ML060390298
| ML060390298 | |
| Person / Time | |
|---|---|
| Site: | Dresden, Quad Cities  |
| Issue date: | 02/03/2006 |
| From: | Satorius M Division Reactor Projects III |
| To: | Crane C Exelon Generation Co, Exelon Nuclear |
| References | |
| RS-06-015 | |
| Download: ML060390298 (4) | |
Text
February 3, 2006 Mr. Christopher M. Crane President and Chief Nuclear Officer Exelon Nuclear Exelon Generation Company, LLC Quad Cities Nuclear Power Station and Dresden Nuclear Power Station 4300 Winfield Road Warrenville, IL 60555
SUBJECT:
COMMITMENTS AND PLANS RELATED TO EXTENDED POWER UPRATE OPERATION AT DRESDEN AND QUAD CITIES NUCLEAR POWER STATIONS
Dear Mr. Crane:
This refers to Exelon Generation Company, LLC (EGC), Letter RS-06-015, dated January 26, 2006, which provided your commitments and plans regarding operation of the Quad Cites Nuclear Power Station Units 1 and 2 and Dresden Nuclear Power Station Units 2 and 3 at extended power uprate (EPU) conditions following the recent discovery of degraded electromatic relief valve (ERV) actuators at Quad Cities. Your commitments included keeping both Quad Cities units at pre-EPU power level (2511 Mwt) until the ERV root cause evaluation is complete, necessary corrective actions are implemented, and a meeting is held with the NRC to discuss those actions. Your letter also discussed your actions and remaining commitments with respect to the steam dryers at the Quad Cities and Dresden Nuclear Power Stations and operation at EPU power.
The NRC staff has conducted a review of the information in your January 26, 2006, letter regarding the commitments and plans related to the ERVs, steam dryers, and operation of the Quad Cities and Dresden units at EPU power levels. The NRC has no regulatory basis to take exception with your proceeding as described in your January 26, 2006 letter. However, based on vibration related problems that have continued to be identified during operation at EPU power levels, the staff expects that your root cause and corrective actions will not be narrowly focused on the ERV issues in terms of flow-induced vibration. Rather, our view is that you need to resolve the questions surrounding the cause of the severe vibration damage, the adequacy of the vibration qualification of the ERVs and other plant components, the location for accelerometer monitoring of susceptible plant components, the establishment of appropriate acceptance criteria for plant vibration, the performance of detailed inspection walkdowns, and the evaluation of results. We look forward to discussing these issues with your staff.
If you have any questions regarding this matter, please contact Mark Ring of my staff at (630) 829-9703.
C. Crane In accordance with 10 CFR 2.390 of the NRCs Rules of Practice, a copy of this letter, and any responses you provide will be made available electronically for public inspection in the NRC Public Document Room or from the Publicly Available Records System (PARS) component of NRCs document system (ADAMS). ADAMS is accessible from the NRC Web site at http://www.nrc.gov/reading-rm/adams.html (the Public Electronic Reading Room).
Sincerely,
/RA/
Mark A. Satorius, Director Division of Reactor Projects Docket Nos. 50-237; 50-249; 50-254; 50-265 License Nos. DPR-19; DRP-25; DPR-29; DPR-30 cc:
Site Vice President - Quad Cities Nuclear Power Station Site Vice President - Dresden Nuclear Power Station Dresden Nuclear Power Station Plant Manager Quad Cities Nuclear Power Station Plant Manager Regulatory Assurance Manager - Quad Cities Regulatory Assurance Manager - Dresden Chief Operating Officer Senior Vice President - Nuclear Services Senior Vice President - Mid-West Regional Operating Group Vice President - Mid-West Operations Support Vice President - Licensing and Regulatory Affairs Director Licensing - Mid-West Regional Operating Group Manager Licensing - Dresden and Quad Cities Senior Counsel, Nuclear, Mid-West Regional Operating Group Document Control Desk - Licensing Vice President - Law and Regulatory Affairs Mid American Energy Company Assistant Attorney General Illinois Department of Nuclear Safety State Liaison Officer, State of Illinois State Liaison Officer, State of Iowa Chairman, Illinois Commerce Commission D. Tubbs, Manager of Nuclear MidAmerican Energy Company
C. Crane In accordance with 10 CFR 2.390 of the NRCs Rules of Practice, a copy of this letter, and any responses you provide will be made available electronically for public inspection in the NRC Public Document Room or from the Publicly Available Records System (PARS) component of NRCs document system (ADAMS). ADAMS is accessible from the NRC Web site at http://www.nrc.gov/reading-rm/adams.html (the Public Electronic Reading Room).
Sincerely,
/RA/
Mark A. Satorius, Director Division of Reactor Projects Docket Nos. 50-237; 50-249; 50-254; 50-265 License Nos. DPR-19; DRP-25; DPR-29; DPR-30 cc:
Site Vice President - Quad Cities Nuclear Power Station Site Vice President - Dresden Nuclear Power Station Dresden Nuclear Power Station Plant Manager Quad Cities Nuclear Power Station Plant Manager Regulatory Assurance Manager - Quad Cities Regulatory Assurance Manager - Dresden Chief Operating Officer Senior Vice President - Nuclear Services Senior Vice President - Mid-West Regional Operating Group Vice President - Mid-West Operations Support Vice President - Licensing and Regulatory Affairs Director Licensing - Mid-West Regional Operating Group Manager Licensing - Dresden and Quad Cities Senior Counsel, Nuclear, Mid-West Regional Operating Group Document Control Desk - Licensing Vice President - Law and Regulatory Affairs Mid American Energy Company Assistant Attorney General Illinois Department of Nuclear Safety State Liaison Officer, State of Illinois State Liaison Officer, State of Iowa Chairman, Illinois Commerce Commission D. Tubbs, Manager of Nuclear MidAmerican Energy Company DOCUMENT NAME: E:\\Filenet\\ML060390298.wpd To receive a copy of this document, indicate in the box: "C" = Copy without attachment/enclosure "E" = Copy with attachment/enclosure "N" = No copy OFFICE RIII E RIII E NRR E
RIII NAME MRing for ABarker:dtp MRing EHackett (per email)
MSatorius DATE 02/03/06 02/03/06 02/03/06 02/03/06 OFFICIAL RECORD COPY
C. Crane ADAMS Distribution:
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