Exhibit 10(d)











                        CONSTELLATION ENERGY GROUP, INC.



                       SENIOR EXECUTIVE SUPPLEMENTAL PLAN















                            Effective January 1, 2000




                        CONSTELLATION ENERGY GROUP, INC.

                       SENIOR EXECUTIVE SUPPLEMENTAL PLAN


1.   Objective.  The objective of this Plan is to enhance the benefits  provided
     to certain senior executive officers of Constellation  Energy Group and its
     subsidiaries in order to attract and retain talented executive personnel.

2.   Definitions.  All words  beginning  with an initial  capital letter and not
     otherwise  defined  herein  shall have the meaning set forth in the Pension
     Plan.  All singular  terms defined in this Plan will include the plural and
     vice  versa.  As used  herein,  the  following  terms will have the meaning
     specified below:

     "Average  Annual Base Salary"  means an amount  determined by (a) computing
     the monthly base rate of pay amounts (i.e.,  the types of such pay that are
     includable in the  computation  of Pension Plan  benefits)  paid during the
     prior five consecutive twelve month periods immediately preceding the month
     that includes the date of the computation, and (b) averaging the two twelve
     month periods during which the highest amounts were paid.

     "Average Incentive Award" (or "Average Award") means the average of the two
     highest of the  participant's  five  immediately  prior year awards  earned
     under  Constellation   Energy  Group's  Executive  Annual  Incentive  Plan,
     Constellation Energy Group's Senior Management Annual Incentive Plan and/or
     Other Incentive Awards Program.

     "Benefit Start Date" means the date as of which the participant's benefits,
     if any, under this Plan commence.

     "Cause" means the  participant's  (a) failure to comply with  Constellation
     Energy Group policy, (b) deliberate and continual refusal to satisfactorily
     perform   employment   duties  on  substantially  a  full-time  basis,  (c)
     deliberate  and continual  refusal to act in  accordance  with any specific
     instructions  of a  majority  of  Constellation  Energy  Group's  Board  of
     Directors,   (d)   disclosure,   without  the  consent  of  a  majority  of
     Constellation   Energy   Group's  Board  of  Directors,   of   confidential
     information or trade secrets  concerning  Constellation  Energy Group which
     could  be  materially  damaging  to  Constellation  Energy  Group,  or  (e)
     deliberate




     misconduct which could be materially damaging to Constellation Energy Group
     without  reasonable good faith belief by the participant  that such conduct
     was in the best interest of Constellation Energy Group.

     "Change in Control"  means (a) the purchase or  acquisition  by any person,
     entity or group of persons,  (within the meaning of Section  13(d) or 14(d)
     of the  Securities  Exchange  Act of  1934  (the  "Exchange  Act"),  or any
     comparable  successor  provisions),  of  beneficial  ownership  (within the
     meaning of Rule 13d-3  promulgated under the Exchange Act) of 20 percent or
     more of either  the  outstanding  shares of common  stock of  Constellation
     Energy Group or the combined voting power of  Constellation  Energy Group's
     then outstanding shares of voting securities  entitled to a vote generally,
     or (b) the  consummation  of, following the approval by the stockholders of
     Constellation Energy Group of a reorganization, merger, or consolidation of
     Constellation Energy Group, in each case, with respect to which persons who
     were  stockholders of Constellation  Energy Group immediately prior to such
     reorganization, merger or consolidation do not, immediately thereafter, own
     more  than  50  percent  of the  combined  voting  power  entitled  to vote
     generally  in the  election  of  directors  of the  reorganized,  merged or
     consolidated entity's then outstanding securities,  or (c) a liquidation or
     dissolution of Constellation  Energy Group or the sale of substantially all
     of its assets,  or (d) a change of more than one-half of the members of the
     Board of Directors of Constellation Energy Group within a 90-day period for
     reasons other than the death, disability, or retirement of such members.

     "Committee"  means the Committee on Management of the Board of Directors of
     Constellation Energy Group.

     "Constellation  Energy Group" means  Constellation  Energy  Group,  Inc., a
     Maryland corporation, or its successor.

     "Constellation  Energy Group's  Executive Annual Incentive Plan" means such
     plan or other  incentive plan or  arrangement  designated in writing by the
     Plan Administrator.

     "Constellation  Energy Group's Senior  Management  Annual  Incentive  Plan"
     means  such  plan or other  incentive  plan or  arrangement  designated  in
     writing by the Plan Administrator.


                                        2



     "Demotion" means a transfer to a position with  Constellation  Energy Group
     or  a  subsidiary  of  Constellation   Energy  Group  that  either  (a)  is
     substantially  below the position in which the  participant was employed on
     the date of transfer, or (b) results in a substantial reduction in pay when
     compared to the  participant's  pay on the date of the transfer.  Whether a
     position is substantially below another position shall be determined in the
     reasonable discretion of the Committee, with reference to factors including
     whether the participant  retains principal  responsibility for a department
     or  division,   and  whether  the  participant  remains  eligible  for  the
     perquisites enjoyed by the participant before the position change.

     "Early Receipt  Reduction  Factor" means 100% less 1/3 of 1% for each month
     that the participant is less than age 62 on the participant's Benefit Start
     Date.

     "Interest  Rate"  means  the rate  equal  to the  average  monthly  30-year
     Treasury  bond  rate  for  the  second  calendar   quarter   preceding  the
     computation date, less 50 basis points.

     "Internal Revenue Code Limitations" means the limitations under Section 415
     and/or 401(a)(17) of the Internal Revenue Code.

     "LTD Plan" means the Constellation  Energy Group, Inc. Disability Insurance
     Plan as may be amended from time to time, or any successor plan.

     "Mortality  Table" means the mortality  table used to convert  annuities to
     lump sums in the Pension Plan.

     "Other Incentive Awards Program" means the program(s) designated in writing
     by the Plan  Administrator  applicable to certain  employees  that provides
     awards;  but includes  only the types of awards that are  includable in the
     computation of Pension Plan benefits.

     "Pension Plan" means the Pension Plan of Constellation  Energy Group,  Inc.
     as may be amended from time to time, or any successor plan.

     "Plan"  means  this  Constellation  Energy  Group,  Inc.  Senior  Executive
     Supplemental Plan.


                                        3


     "Plan Administrator" means, as set forth in Section 3, the Committee.

     "Rabbi  Trust"  means the  trust  adopted  by  Constellation  Energy  Group
     pursuant to the Grantor Trust Agreement Dated as of April 30, 1999, between
     Constellation Energy Group and Citibank, N.A.

     "Survivor Annuity  Percentage" means 50%, unless the participant elects, in
     the timing  and  manner  established  by the Plan  Administrator,  a higher
     percentage (in multiples of 5% to a total percentage not to exceed 100%).

     "Termination  From  Employment  With  Constellation  Energy  Group" means a
     participant's  separation from service with Constellation Energy Group or a
     subsidiary  of  Constellation   Energy  Group;   however,  a  participant's
     retirement,  disability,  or transfer of employment to or from a subsidiary
     of  Constellation  Energy  Group shall not  constitute a  Termination  From
     Employment With Constellation Energy Group.

     "Total  SERP  Service"  means  (a)  Credited  Service   accumulated   while
     designated as a participant  with respect to supplemental  pension benefits
     under this Plan or while a participant under the Constellation Energy Group
     Supplemental  Pension Plan, or while a  participant  under any  predecessor
     executive  supplemental  pension  benefit  plan,  plus  (b) one  fourth  of
     Credited Service accumulated while not such a participant.


3.   Plan  Administration.  The Committee is the Plan  Administrator  and has
     sole authority (except as specified otherwise herein) to interpret the Plan
     and,  in  general,  to make  all  other  determinations  advisable  for the
     administration  of the Plan to  achieve  its stated  objective.  Appeals of
     written  decisions  by the Plan  Administrator  may be made to the Board of
     Directors of  Constellation  Energy Group.  Decisions by the Board shall be
     final and not subject to further appeal. The Plan Administrator  shall have
     the  power  to  delegate  all or any  part  of its  duties  to one or  more
     designees, and to withdraw such authority, by written designation.

4.   Eligibility. Each senior executive officer of Constellation Energy Group
     or its subsidiaries may be designated in

                                        4


     writing by the Plan  Administrator  as a participant with respect to one or
     more benefits under the Plan. Once designated, participation shall continue
     until such  designation is withdrawn at the discretion and by written order
     of the Plan Administrator,  provided, however, that such withdrawal may not
     be made with respect to a participant  who has  satisfied  the  eligibility
     requirements to retire (as set forth in Section  5(b)(i)).  Notwithstanding
     the foregoing,  any participant  while classified as disabled under the LTD
     Plan  shall  continue  to  participate  in this Plan  while  classified  as
     disabled and, for purposes of the supplemental  pension benefit provided by
     this Plan,  while  classified  as disabled,  shall be deemed to continue to
     accrue Credited Service until no later than his/her Normal Retirement Date.

5.   Supplemental Pension Benefit.

     (a)  Generally. A participant in the Plan as of January 1, 2000, as well as
          an individual  who becomes a participant  in this Plan after such date
          and  who  was  a  participant  in  the   Constellation   Energy  Group
          Supplemental Pension Plan as of January 1, 2000, shall be eligible for
          supplemental   pension   benefits   under   this   Plan  only  if  the
          participant's  supplemental  pension  benefits  under  this  Plan  are
          greater than the  supplemental  pension  benefits  computed  under the
          Constellation  Energy  Group  Supplemental  Pension  Plan based on the
          participant's age, service,  and eligible  compensation on the date as
          of which benefits  become payable.  Any other  participant in the Plan
          shall be eligible for benefits  under this Plan without  regard to any
          computation under the Constellation  Energy Group Supplemental Pension
          Plan.

     (b) Retirement benefits.

          (i)  Eligibility  for  retirement  benefits.  A  participant  shall be
          eligible  to retire  under  this  Plan on or after  the  participant's
          Normal  Retirement  Date,  or on the first day of any month  preceding
          his/her Normal  Retirement Date, if on his/her  Severance From Service
          Date and while a  participant  he/she has  attained (1) age 55 and has
          accumulated at least 10 years of Credited  Service;  or (2) age 62 and
          has accumulated at least five years of Credited Service.


                                        5


          (ii) Computation of retirement benefits. A participant who is eligible
          to retire  under this Plan will be  entitled to  supplemental  pension
          retirement  benefits under this Plan,  which will be calculated as set
          forth below on the participant's Benefit Start Date:

               (1) add the Average Annual Base Salary and the Average  Incentive
               Award,

               (2) divide the sum by 12,

               (3) multiply  this dollar amount by the  appropriate  percentage,
               determined  as follows:  Chairman of the Board and  President  of
               Constellation  Energy  Group - 60%;  all other  participants  (by
               years of Total SERP Service) 5.5% per year, (maximum is 55%).

               (4) multiply this dollar  amount by the Early  Receipt  Reduction
               Factor; provided,  however, if the participant is age 62 or older
               on his/her Benefit Start Date, such factor shall be one (1),

               (5)  subtract  from this dollar  amount the  charges  relating to
               coverage for a pre-retirement  survivor annuity in excess of 50%,
               and for a post-retirement survivor annuity in excess of 50%, and

               (6) subtract from the remainder the net monthly amount payable to
               the  participant  under the  Pension  Plan  when the  participant
               actually commences such monthly Pension Plan payments (assuming a
               50%   spousal   joint  and   survivor   annuity   for  a  married
               participant),  or, if the participant elects a lump sum under the
               PEP provisions of the Pension Plan, the monthly amount that would
               have been payable  under the Pension Plan as a life annuity for a
               single participant or as a 50% spousal joint and survivor annuity
               for a married  participant,  as of the  Benefit  Start Date under
               this Plan.


                                        6


          (iii) Form of payout of retirement benefits. Each participant entitled
          to  supplemental  pension  retirement  benefits  will receive  his/her
          supplemental  pension  retirement  benefits  payout  in the  form of a
          monthly  payment,  unless the  participant  makes a valid  election to
          receive his/her supplemental pension retirement benefits payout in the
          form of a lump sum.

          A  participant  may  elect to  receive  his/her  supplemental  pension
          retirement  benefits payout in the form of a lump sum by submitting to
          the Plan  Administrator a signed Lump Sum Election Form. The Form must
          be  received by the Plan  Administrator  before the  beginning  of the
          calendar year during which the  participant's  Severance  From Service
          Date  occurs.  The  election  may be  revoked  at any time  before the
          beginning  of  the  calendar  year  during  which  the   participant's
          Severance  From  Service  Date  occurs,  by  submitting  to  the  Plan
          Administrator a signed Lump Sum Revocation Form.

          (iv) Amount,  timing, and source of monthly retirement benefit payout.
          A  participant  entitled to monthly  supplemental  pension  retirement
          benefits will receive monthly payments equal to the amount  determined
          under paragraph  (b)(ii).  Such payments shall commence effective with
          the first of the month  following  the  Participant's  Severance  From
          Service Date. If such participant receives (or would have received but
          for  the   Internal   Revenue   Code   Limitations)   cost  of  living
          adjustment(s)  under the Pension Plan, the monthly payments  hereunder
          will be automatically increased based on the percentage of, and at the
          same time as, such  adjustment(s).  Monthly  payments  hereunder shall
          permanently  cease upon the death of the  participant,  effective with
          the  monthly  payment  for  the  month  following  the  month  of  the
          participant's  death.  Monthly  payments  hereunder  shall  be made in
          accordance  with the  provisions of the Rabbi Trust and, to the extent
          not paid under the terms of the Rabbi Trust,  from  general  corporate
          assets.

          (v) Amount,  timing, and source of lump sum retirement benefit payout.
          A participant  entitled to a lump


                                        7


          sum supplemental  pension  retirement  benefit will receive a lump sum
          payment.  This lump sum  payment  will be  calculated  by a  certified
          actuary and will be equal to the present value of an immediate annuity
          including the estimated present value of post-retirement  supplemental
          survivor annuity  benefits  described in Section 6, and reflecting the
          present  value of any  deferred  Pension Plan  payments  using (1) the
          supplemental   pension  retirement  benefit  amount  calculated  under
          paragraph  (b)(ii),  which is expressed as a monthly  amount,  (2) the
          Interest Rate computed on the  participant's  Benefit Start Date,  and
          (3) the Mortality Table. Such lump sum payment shall be made within 60
          days after the participant's Severance From Service Date. The lump sum
          payment shall be made in accordance  with the  provisions of the Rabbi
          Trust and, to the extent not paid under the terms of the Rabbi  Trust,
          from general  corporate  assets. A participant who receives a lump sum
          payment  shall not be entitled to any cost of living or other  pension
          payment  adjustments or to  post-retirement  survivor annuity coverage
          under the Plan.

          (vi) Death of participant entitled to lump sum payout. In the event of
          the death of a participant  after his/her  Severance From Service Date
          and  before  the  participant  receives  the  lump sum  payment  under
          paragraph  (b)(v),  such  lump  sum  payment  shall  be  made  to  the
          participant's  surviving spouse (as defined in Section 6(i)). The lump
          sum  payment  shall be the same  amount  and made at the same time and
          from the same sources as set forth in paragraph (b)(v). If there is no
          surviving spouse at the date of the  participant's  death, no payments
          shall be made  pursuant  to  Sections 5 or 6. A  surviving  spouse who
          receives a lump sum benefit under this paragraph  (b)(vi) shall not be
          entitled to any cost of living or other pension payment adjustments or
          to post-retirement survivor annuity coverage under the Plan.


                                        8



     (c) Entitlement to benefit upon happening of certain events.

          (i) Computation of gross accrued benefit. The computation of the gross
          accrued  supplemental pension benefit for a participant as of the date
          of the computation will be made as follows:

               (1) add the Average Annual Base Salary and the Average  Incentive
               Award,

               (2) divide the sum by 12, and

               (3) multiply  this dollar amount by the  appropriate  percentage,
               determined  as follows:  Chairman of the Board and  President  of
               Constellation  Energy  Group - 60%;  all other  participants  (by
               years of Total SERP  Service  as of the date of the  computation)
               5.5% per year (maximum is 55%).

          (ii)  Computation of net accrued  benefit.  The computation of the net
          accrued  supplemental pension benefit for a participant as of the date
          of the computation  will be made by subtracting from the gross accrued
          benefit   determined   under  paragraph   (c)(i)  the  amount  of  the
          participant's  Gross Pension  under the Pension Plan  determined as of
          the date of the computation and assuming that monthly payments of such
          Gross  Pension  begin on the  first of the  month  after  the later of
          reaching age 62 or the date of the computation.  If the participant is
          not eligible for payment of a Gross  Pension  under the Pension  Plan,
          the participant's  Accrued Gross Pension  determined as of the date of
          the computation  shall be substituted for the Gross Pension  described
          above, with the appropriate  reduction for early receipt applied as if
          the  participant  were  eligible to begin payment of his Accrued Gross
          Pension on the first of the month after the later of  reaching  age 62
          or the date of the computation.

          (iii)Satisfaction of requirements. A participant who has satisfied the
          age and Credited  Service  requirements  set forth in Section  5(b)(i)
          while eligible as set forth in Section 4, but who does


                                        9



          not retire under the Plan due to Demotion, Termination From Employment
          With Constellation  Energy Group, or the withdrawal of a participant's
          eligibility  to  participate  under  Section 5, shall be  entitled  to
          his/her net accrued  supplemental  pension benefit. The effective date
          of the Demotion, Termination From Employment With Constellation Energy
          Group,  or  eligibility  withdrawal  event  shall  be the date of such
          Demotion, Termination From Employment With Constellation Energy Group,
          or eligibility withdrawal.

          (iv) Other events. A participant,  regardless of his/her age and years
          of  Credited  Service,  shall  be  entitled  to  his/her  net  accrued
          supplemental  pension  benefit  upon  the  happening  of  any  of  the
          following  entitlement  events,  but  only if such  entitlement  event
          occurs while a participant and before a participant retires under this
          Plan:

               (1) Change in Control.  A Change in Control,  followed within two
               years by the participant's Demotion, a participant's  Termination
               From   Employment  With   Constellation   Energy  Group,  or  the
               withdrawal of the participant's  eligibility to participate under
               the Plan, is an  entitlement  event.  The  effective  date of the
               entitlement event shall be the date of the Demotion,  Termination
               From Employment With  Constellation  Energy Group, or eligibility
               withdrawal.

               (2) Plan  amendment.  A Plan  amendment  that has the  effect  of
               reducing  a  participant's  gross  accrued  supplemental  pension
               benefit is an entitlement  event.  In determining  whether such a
               reduction  has   occurred,   the   participant's   gross  accrued
               supplemental  pension  benefit  calculated on the day immediately
               preceding the effective  date of the amendment  shall be compared
               to the participant's gross accrued  supplemental  pension benefit
               calculated on the effective date of the  amendment.  An amendment
               that has the effect of reducing future benefit

                                       10


               accruals is not an  entitlement  event.  It is  intended  that an
               entitlement  event under this  paragraph  (c)(iii)(2)  will occur
               only with  respect  to those  amendments  that are  substantially
               similar to amendments  that are  prohibited  by Internal  Revenue
               Code section  411(d)(6) with respect to qualified  pension plans.
               The  effective  date  of  the  entitlement  event  shall  be  the
               effective date of the Plan amendment.

               (3)  Involuntary  Demotion,   Termination  From  Employment  With
               Constellation  Energy Group,  or eligibility  withdrawal  without
               Cause.  A  participant's   involuntary  Demotion  or  involuntary
               Termination  From  Employment  With  Constellation  Energy  Group
               without Cause, or the withdrawal of a  participant's  eligibility
               to  participate  under Sections 5 or 6 of the Plan without Cause,
               is an entitlement  event.  The effective date of the  entitlement
               event  shall  be  the   effective   date  of  the   participant's
               involuntary  Demotion or involuntary  Termination From Employment
               With Constellation Energy Group without Cause, or the eligibility
               withdrawal without Cause.

          (v) Form of benefit  payout.  Each  participant  entitled  to a payout
          under this  paragraph  (c) will  receive  such payout in the form of a
          lump sum payment.

          (vi)  Amount,  timing,  and source of benefit  payout.  A  participant
          entitled to a payout of his/her net  accrued  benefit,  as a result of
          the  occurrence  of  an  event   described  in  paragraphs   (c)(iii),
          (c)(iv)(1),  (2), or (3) will be entitled to a lump sum benefit.  This
          lump sum benefit  will be  calculated  by a  certified  actuary as the
          present  value,  determined  as of the date of payment,  of an annuity
          beginning  at  age  62  (or  the  participant's  actual  age,  if  the
          participant  is older than age 62 on the date the lump sum  benefit is
          payable),  including  the estimated  present value of  post-retirement
          survivor  annuity  benefits  described in Section 6, using (1) the net
          accrued  benefit  amount  calculated  under  paragraph  (d)(iv) on the
          effective date of the entitlement event, which is

                                       11



          expressed as a monthly  amount,  (2) the Interest Rate computed on the
          date the lump sum benefit is payable, and (3) the Mortality Table. The
          lump sum benefit  shall be payable as of the  participant's  Severance
          From Service Date, and shall be made within 60 days after such date in
          accordance  with the  provisions of the Rabbi Trust and, to the extent
          not paid under the terms of the Rabbi Trust,  from  general  corporate
          assets.  A  participant  who  receives a lump sum  benefit  under this
          paragraph (c)(vi) shall not be entitled to any cost of living or other
          pension payment  adjustments or to pre-retirement  or  post-retirement
          survivor annuity coverage.

          (vii)Death of participant entitled to lump sum payout. In the event of
          the death of a participant  after the occurrence of an event described
          in  paragraphs  (c)(iii),  (c)(iv)(1),  (2),  or (3)  and  before  the
          participant  receives the lump sum payment under paragraph  (c)(vi), a
          lump sum payment shall be made to the  participant's  surviving spouse
          (as defined in Section 6(i)).  The lump sum payment will be calculated
          by a certified  actuary and will be equal to 100% of the lump sum that
          would have been paid to the  participant  under  paragraph (vi), as of
          the date on which the lump sum is payable under this paragraph  (vii),
          provided that the  participant's  date of death is on or after his/her
          Severance  From Service  Date. If the  participant's  date of death is
          before  his/her  Severance From Service Date, 50% shall be substituted
          for 100% in the  preceding  sentence.  The lump sum  benefit  shall be
          payable as of the earlier of the participant's  Severance From Service
          Date or date of death,  and shall be made  within 60 days  after  such
          date in accordance  with the provisions of the Rabbi Trust and, to the
          extent  not paid  under  the terms of the Rabbi  Trust,  from  general
          corporate  assets.  If there is no surviving spouse at the date of the
          participant's  death, no payments shall be made pursuant to Sections 5
          or 6. A surviving  spouse who  receives a lump sum benefit  under this
          paragraph  (c) (vii)  shall not be  entitled  to any cost of living or
          other pension payment adjustments or to pre-retirement or post-


                                       12


          retirement survivor annuity coverage under the Plan.


6.       Supplemental Survivor Annuity Benefit.

         (a)      Survivor annuity benefit.

          (i) Eligibility for survivor annuity benefit. Following the death of a
          participant who is fully vested under the Pension Plan, a supplemental
          survivor  annuity may be paid to the  participant's  surviving  spouse
          until the death of that spouse, using the Survivor Annuity Percentage.
          The participant will not bear the cost of up to a 50% survivor annuity
          benefit,  but will  bear the cost of a  survivor  annuity  benefit  in
          excess of 50%.  For purposes of this  Section  6(a),  a  participant's
          surviving  spouse is the individual  married to the participant on the
          date of the  participant's  death. If there is no surviving spouse, or
          if the participant or the participant's  spouse previously received or
          is  entitled  to  receive  a lump  sum  payment  under  Section  5, no
          supplemental survivor annuity will be payable.

          (ii)  Computation  of  survivor  annuity  benefit.  The  amount of the
          supplemental survivor annuity will be determined as follows:

               (1) if the participant's Benefit Start Date occurred prior to the
               date of death:

                    (a) begin with the monthly  pension  benefit  (under Section
                    5(b) of this Plan) that the  participant was receiving prior
                    to the date of death, and

                    (b)  multiply  this dollar  amount by the  Survivor  Annuity
                    Percentage.

               (2) otherwise:

                    (a) begin with the monthly Early Retirement  pension benefit
                    (under both the Pension  Plan and Section 5(b) of this Plan)
                    to which the participant would have been


                                       13



                    entitled if the participant had been retired at the later of
                    age 60 or  his/her  actual  age on the  date  of  death  for
                    purposes of computing the Early Receipt Reduction Factor,

                    (b)  multiply  this dollar  amount by the  Survivor  Annuity
                    Percentage,

                    (c) subtract from the product the net amount, if any, of the
                    survivor annuity provided on behalf of the participant under
                    the Pension Plan if the participant is  participating in the
                    Traditional  Pension Plan, or the monthly annuity that would
                    have been provided to the participant's spouse assuming that
                    he  or  she  had  been   designated  as  the   participant's
                    beneficiary and had chosen to receive a survivor  benefit in
                    the  form  of a  monthly  annuity,  if  the  participant  is
                    participating in the PEP, and

                    (d) subtract from this dollar amount the charges relating to
                    coverage  (under both the Pension  Plan and this Plan) for a
                    pre-retirement  survivor annuity in excess of 50%, and for a
                    post-retirement survivor annuity in excess of 50%.

          (iii) Form of payout of  survivor  annuity  benefits.  Each  surviving
          spouse  entitled  to a  supplemental  survivor  annuity  benefit  will
          receive  his/her  survivor  annuity  benefit  payout  in the form of a
          monthly payment.

          (iv) Amount,  timing,  and source of monthly  survivor annuity benefit
          payout. A surviving spouse entitled to monthly  supplemental  survivor
          annuity  benefits  will receive a monthly  payment equal to the amount
          determined  under (ii) above.  Such payments shall commence  effective
          with  the  first  day  of  the  month   following  the  month  of  the
          participant's  death. If such surviving spouse receives (or would have
          received but for the Internal Revenue Code Limitations) cost of living

                                       14


          adjustment(s)  under the Pension Plan, the monthly payments  hereunder
          will be automatically increased based on the percentage of, and at the
          same time as, such  adjustment(s).  Monthly  payments  hereunder shall
          permanently  cease upon the death of the surviving  spouse,  effective
          with the  monthly  payment  for the month  following  the month of the
          surviving spouse's death.  Monthly payments hereunder shall be made in
          accordance  with the  provisions of the Rabbi Trust and, to the extent
          not paid under the terms of the Rabbi Trust,  from  general  corporate
          assets.

7.        Death  Benefit.  Constellation  Energy Group shall make  arrangements,
          through its split-dollar life insurance program or otherwise, for life
          insurance coverage for each designated  participant providing that the
          participant's  beneficiary  shall receive,  as a pre-retirement  death
          benefit,  an amount  which is  approximately  equal to three times the
          participant's  base salary control point plus target annual  incentive
          (as determined in the sole discretion of the Plan Administrator),  and
          as a post-retirement  death benefit,  an amount which is approximately
          equal to two times the  participant's  base salary  control point plus
          target annual  incentive (as determined in the sole  discretion of the
          Plan Administrator),  as set forth in a separate agreement between the
          participant and his/her employer.

          As determined in the sole discretion of the Plan Administrator, in the
          event that either (i) a participant  is ineligible to receive the type
          of life insurance  coverage provided to other  participants under this
          Plan,   or  (ii)  such   coverage  is  not   available  on  reasonably
          cost-effective  terms as a result of any  penalty for smoking or other
          factors that are  reflected in the  insurance  carrier's  rates,  then
          Constellation  Energy  Group  shall  provide  a benefit  that,  in the
          discretion of the Plan Administrator,  is substantially  equivalent to
          the cost of the  benefit  provided  to other  participants  under this
          Plan.

 8.       Dependent  Death  Benefit.  For a participant  with a split-dollar
          policy under  Section 7, in the event of the death of a  participant's
          qualified  dependent  while the  participant is an active  employee of
          Constellation  Energy Group or a subsidiary  of  Constellation  Energy
          Group,  Constellation  Energy Group shall make a death benefit payment
          to the

                                       15


          participant,  from  general  corporate  assets.  For  purposes of this
          Section 8,  qualified  dependent  shall  have the same  meaning as set
          forth in Constellation  Energy Group's Family Life Insurance Plan. For
          purposes of this Section 8, the amount of death benefit  payment shall
          be the highest  amount of insurance  that would have been payable with
          respect to such  qualified  dependent  if coverage  had been  provided
          under  Constellation  Energy Group's  Family Life Insurance  Plan. The
          dependent  death  benefit  payment under this Plan shall be grossed-up
          for income tax withholding.

9.        Miscellaneous.  None of the benefits provided under this Plan shall
          be  subject  to  alienation  or  assignment  by  any   participant  or
          beneficiary  nor  shall  any of  them  be  subject  to  attachment  or
          garnishment or other legal process except (i) to the extent  specially
          mandated and directed by applicable State or Federal statute;  (ii) as
          requested by the  participant  or  beneficiary  to satisfy  income tax
          withholding or liability; and (iii) any policy of insurance written by
          a commercial carrier on a split-dollar basis shall be assignable.

          This Plan may be amended from time to time, or suspended or terminated
          at any time, provided, however, that no amendment or termination shall
          reduce any previously accrued  supplemental pension benefit under this
          Plan or impair the rights of any  participant or beneficiary  entitled
          to receive  current or future  payment  hereunder  at the time of such
          action.  All  amendments to this Plan which would increase or decrease
          the compensation of any Officer of Constellation  Energy Group, either
          directly or  indirectly,  must be approved by the Board of  Directors.
          All other permissible  amendments may be made at the written direction
          of the Committee.

          Participation  in  this  Plan  shall  not  constitute  a  contract  of
          employment between Constellation Energy Group and any person and shall
          not be deemed to be  consideration  for, or a condition of,  continued
          employment of any person.

          The Plan, notwithstanding the creation of the Rabbi Trust, is intended
          to be  unfunded  for  purposes of Title I of the  Employee  Retirement
          Income  Security  Act of 1974.  Constellation  Energy Group shall make
          contributions  to the Rabbi Trust in accordance  with the terms of the
          Rabbi Trust.  Any funds which may be invested and any assets which may
          be held to provide benefits under this Plan shall continue for


                                       16



          all  purposes  to be a  part  of  the  general  funds  and  assets  of
          Constellation  Energy  Group and no person  other  than  Constellation
          Energy Group shall by virtue of the  provisions  of this Plan have any
          interest  in such  funds and  assets.  To the  extent  that any person
          acquires a right to receive payments from  Constellation  Energy Group
          under this Plan, such rights shall be no greater than the right of any
          unsecured general creditor of Constellation Energy Group.

          In the event  Constellation  Energy Group becomes a party to a merger,
          consolidation,  sale of  substantially  all of its assets or any other
          corporate  reorganization in which Constellation Energy Group will not
          be the  surviving  corporation  or in which the  holders of the common
          stock of Constellation Energy Group will receive securities of another
          corporation  (in any  such  case,  the  "New  Company"),  then the New
          Company  shall  assume  the rights and  obligations  of  Constellation
          Energy Group under this Plan.

         This Plan shall be governed in all respects by Maryland law.

                                       17