UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              Washington, DC 20549
                                    FORM 8-K



                                 CURRENT REPORT


                Pursuant to Section 13 or 15(d) of the Securities
                              Exchange Act of 1934




                                  July 29, 2003
                                (Date of earliest
                                 event reported)

                                                                                             
       Commission File           Name of Registrant; State of Incorporation; Address of        IRS Employer
       Number                    Principal Executive Offices; and Telephone Number             Identification Number
       ---------------------     ----------------------------------------------------------    ------------------------
       1-16169                   EXELON CORPORATION                                            23-2990190
                                 (a Pennsylvania corporation)
                                 10 South Dearborn Street - 37th Floor
                                 P.O. Box 805379
                                 Chicago, Illinois 60680-5379
                                 (312) 394-7398

       333-85496                 EXELON GENERATION COMPANY, LLC                                23-3064219
                                 (a Pennsylvania limited liability company)
                                 300 Exelon Way
                                 Kennett Square, Pennsylvania 19348
                                 (610) 765-6900








Item 5. Other Events.

As  previously  disclosed,  Exelon  Boston  Generating,  LLC (EBG),  an indirect
subsidiary of Exelon  Corporation  (Exelon) and Exelon Generation  Company,  LLC
(Generation),  has approximately  $1.1 billion of debt outstanding under a $1.25
billion  credit  facility  (EBG  Facility).  The EBG  Facility  was entered into
primarily  to  finance  the  construction  of the  Mystic 8 and 9 and Fore River
generating  units.  The EBG Facility  requires that all of the projects  achieve
"Project  Completion," as defined in the EBG Facility (Project  Completion),  by
June 12, 2003.  On June 11,  2003,  EBG  negotiated  an extension of the Project
Completion  date to July 11, 2003.  On July 3, 2003,  the lenders  under the EBG
Facility  and EBG  executed a letter  agreement as a result of which the lenders
are  precluded  during the period  July 11,  2003  through  August 29, 2003 from
exercising  any  remedies  resulting  from the failure of all of the projects to
achieve Project  Completion.  At that time, EBG stated that it would continue to
monitor the projects,  assess all of its options  relating to the projects,  and
continue  discussions  with  the  lenders.  Mystic  8 and 9  are  in  commercial
operation,  although  construction  has not  progressed  to the point of Project
Completion. Construction of Fore River is substantially complete and the unit is
currently  undergoing  testing.  EBG does not anticipate  that the projects will
achieve Project  Completion by August 29, 2003. The EBG Facility is non-recourse
to Exelon and Generation and an event of default under the EBG Facility does not
constitute an event of default under any other debt instruments of Exelon or its
subsidiaries.

As a result of Exelon's  continuing  evaluation of the projects and  discussions
with the lenders over the past few weeks, Exelon has commenced the process of an
orderly transition out of the ownership of EBG and the projects.  The transition
will  take  place  in  a  manner  that  complies  with   applicable   regulatory
requirements.  For a period of time,  Exelon  expects  to  continue  to  provide
administrative and operational services to EBG in its operation of the projects.
Exelon  informed  the lenders of Exelon's  decision to exit and that it will not
provide  additional  funding to the  projects  beyond its  existing  contractual
obligations. Exelon cannot predict the timing of the transition.

Exelon expects  Generation  will incur an impairment of its EBG related  assets,
which, in aggregate, could reach approximately $550 million after income taxes.

This  combined  Form 8-K is being  filed  separately  by Exelon  and  Generation
(Registrants).   Information   contained   herein  relating  to  any  individual
registrant  has been filed by such  registrant on its own behalf.  No registrant
makes any representation as to information relating to any other registrant.

Except for the historical  information contained herein,  certain of the matters
discussed in this Report are forward-looking  statements,  within the meaning of
the Private Securities  Litigation Reform Act of 1995, that are subject to risks
and  uncertainties.  The  factors  that  could  cause  actual  results to differ
materially  from the  forward-looking  statements  made by a registrant  include
those  factors  discussed  herein,  as well as the  items  discussed  in (a) the
Registrants' 2002 Annual Report on Form 10-K - ITEM 7.  Management's  Discussion
and Analysis of Financial Condition and Results of Operations--Business



Outlook and the  Challenges in Managing Our Business for each of Exelon,  ComEd,
PECO and Generation, (b) the Registrants' 2002 Annual Report on Form 10-K - ITEM
8. Financial  Statements and Supplementary  Data: Exelon - Note 19, ComEd - Note
16, PECO - Note 18 and  Generation - Note 13 and (c) other factors  discussed in
filings with the United States  Securities and Exchange  Commission (SEC) by the
Registrants.  Readers  are  cautioned  not to  place  undue  reliance  on  these
forward-looking statements, which apply only as of the date of this Report. None
of the Registrants undertakes any obligation to publicly release any revision to
its forward-looking statements to reflect events or circumstances after the date
of this Report.











                                   SIGNATURES




Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.




                                            EXELON CORPORATION
                                            EXELON GENERATION COMPANY, LLC



                                            /S/  Robert S. Shapard
                                            ----------------------------
                                            Robert S. Shapard
                                            Executive Vice President and
                                            Chief Financial Officer
                                            Exelon Corporation


July 29, 2003