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Category:Letter
MONTHYEARIR 05000237/20230042024-02-0202 February 2024
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Sixth Ten-Year Interval Inservice Testing Program
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RS-23-097, Constellation Energy Generation, LLC, Advisement of Leadership Changes and Submittal of Updated Standard Practice Procedures Plans2023-10-12012 October 2023
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Response to NRC Dresden Nuclear Power Station, Units 2 and 3 - Comprehensive Engineering Team Inspection Report 05000237/2023011 and 05000249/2023011
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ML23205A1362023-09-20020 September 2023
Proposed Alternative Request RV-02D Associated with the Sixth IST Interval
IR 05000237/20230112023-09-0606 September 2023
Comprehensive Engineering Team Inspection Report 05000237/2023011 and 05000249/2023011
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Security Baseline Inspection Report 05000237/2023402 and 05000249/2023402
IR 05000237/20230022023-08-0808 August 2023
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Request to Use a Provision of a Later Edition of the ASME Boiler & Pressure Vessel Code, Section XI
IR 05000237/20234012023-04-26026 April 2023
Cyber Security Inspection Report 05000237/2023401 and 05000249/2023401
ML23081A0382023-04-25025 April 2023
County, 1 & 2; Nine Mile Point, 2; and Quad Cities, 1 & 2 - Issuance of Amendments to Adopt TSTF-306, Rev. 2, Add Action to LCO 3.3.6.1 to Give Option to Isolate the Penetration
IR 05000237/20235012023-04-21021 April 2023
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ML23110A3202023-04-21021 April 2023
Information Request to Support the NRC Annual Baseline Emergency Action Level and Emergency Plan Changes Inspection
RS-23-057, Supplement to License Amendment Request Regarding Transition to GNF3 Fuel2023-04-17017 April 2023
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Annual Dose Report for 2022
ML23088A2242023-04-0505 April 2023
Regulatory Audit Report Regarding License Amendment Request to Transition to GNF3 Fuel
ML23087A0482023-03-28028 March 2023
Operator Licensing Examination Approval - Dresden Nuclear Power Station, April 2023
2024-02-02
[Table view] |
Text
June 9, 2006 Mr. Christopher M. Crane, President Exelon Nuclear Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555
SUBJECT:
DRESDEN NUCLEAR POWER STATION, UNITS 2 AND 3 - FINAL ACCIDENT SEQUENCE PRECURSOR ANALYSIS OF MAY 2004 LOSS OF OFF-SITE POWER EVENT
Dear Mr. Crane:
Enclosed for your information is the final accident sequence precursor (ASP) analysis of an event which occurred at Dresden Nuclear Power Station (Dresden) in May 2004. This involved a scram of Dresden, Unit 3 due to a loss of offsite power (LOOP), and subsequent inoperability of the standby gas treatment system for Dresden, Units 2 and 3 (Licensee Event Report 249/04-003). The LOOP event resulted in a special inspection performed by the Nuclear Regulatory Commission (NRC), and the inspection findings are discussed in the Dresden, Unit 3, NRC Special Inspection Report 05000249/2004009, dated June 21, 2004 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML041730504). The NRCs Significant Determination Process Phase 1 assessment found that the performance deficiency would have resulted in low risk significance. The results of the final ASP analysis indicate that this condition is an accident precursor (i.e., a condition which results in a change in conditional core damage probability (CCDP) > 1E-6),
as the ASP analysis calculated a mean CCDP of 2.8xE-6.
The enclosed analysis, also available under ADAMS Accession No. ML060240407, has been marked as non-sensitive information, and is publicly available.
If you have any questions regarding the analysis, please contact me at 301-415-2277.
Sincerely,
/RA/
Maitri Banerjee, Senior Project Manager Plant Licensing Branch III-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-237 and 50-249
Enclosure:
Final Precursor Analysis cc w/o encl: See next page
ML060240407, has been marked as non-sensitive information, and is publicly available.
If you have any questions regarding the analysis, please contact me at 301-415-2277.
Sincerely,
/RA/
Maitri Banerjee, Senior Project Manager Plant Licensing Branch III-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-237 and 50-249
Enclosure:
Final Precursor Analysis cc w/o encl: See next page DISTRIBUTION:
PUBLIC LPL3-2 R/F RidsNrrDorlLplL3-2 RidsNRRPMMBanerjee RidsNrrLADClarke RidsAcrsAcnwMailCenter RidsOgcRp RidsRgn3MailCenter RidsNrrDorlDpr ADAMS Accession Numbers: Package: ML061310146 Letter: ML061310141
Enclosure:
ML060240407 OFFICE LPL3-2/PM LPL3-2/LA LPL3-2/BC NAME MBanerjee:ca DClarke DCollins DATE 5/26/2006 5/25/2006 6/9/2006 Dresden Nuclear Power Station, Units 2 and 3 cc:
Site Vice President - Dresden Nuclear Power Station Senior Vice President of Operations Exelon Generation Company, LLC Exelon Generation Company, LLC 6500 N. Dresden Road 4300 Winfield Road Morris, IL 60450-9765 Warrenville, IL 60555 Dresden Nuclear Power Station Plant Manager Vice President - Licensing and Regulatory Exelon Generation Company, LLC Affairs 6500 N. Dresden Road Exelon Generation Company, LLC Morris, IL 60450-9765 4300 Winfield Road Warrenville, IL 60555 Regulatory Assurance Manager - Dresden Exelon Generation Company, LLC Director - Licensing and Regulatory Affairs 6500 N. Dresden Road Exelon Generation Company, LLC Morris, IL 60450-9765 4300 Winfield Road Warrenville, IL 60555 U.S. Nuclear Regulatory Commission Dresden Resident Inspectors Office Assistant General Counsel 6500 N. Dresden Road Exelon Generation Company, LLC Morris, IL 60450-9766 200 Exelon Way Kennett Square, PA 19348 Chairman Grundy County Board Manager Licensing - Dresden, Administration Building Quad Cities and Clinton 1320 Union Street Exelon Generation Company, LLC Morris, IL 60450 4300 Winfield Road Warrenville, IL 60555 Regional Administrator, Region III U.S. Nuclear Regulatory Commission Suite 210 2443 Warrenville Road Lisle, IL 60532-4351 Illinois Emergency Management Agency Division of Disaster Assistance &
Preparedness 110 East Adams Street Springfield, IL 62701-1109 Document Control Desk - Licensing Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555
