ML062970389
| ML062970389 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 10/24/2006 |
| From: | Pederson C Division of Reactor Safety III |
| To: | Nazar M Indiana Michigan Power Co |
| References | |
| Download: ML062970389 (3) | |
Text
October 24, 2006 Mr. Mano K. Nazar Senior Vice President and Chief Nuclear Officer Indiana Michigan Power Company Nuclear Generation Group One Cook Place Bridgman, MI 49106
SUBJECT:
REACTOR PRESSURE VESSEL (RPV) HEAD LIFTS AT D.C. COOK NUCLEAR POWER PLANT
Dear Mr. Nazar:
This refers to D.C. Cook Letter AEP:NRC:6514, dated September 22, 2006, and our subsequent acknowledgment letter (ML062650461) to you of the same date regarding RPV head lifts (over the RPV) following NRC staff concerns raised regarding the D.C. Cook RPV head drop analysis. In your letter, you indicated that you would perform a more detailed, rigorous quantitative analysis to provide additional safety assurance, and that you would discuss those results with NRC staff prior to subsequent lifts of the RPV head over the RPV with fuel in the vessel during the current refuel outage.
This letter documents our review of that analysis and subsequent clarifications and discussions, culminating in our discussion with your staff on October 23, 2006. During that discussion, we communicated our conclusion that your detailed analysis and commitments including a limitation on lift height, flooding of the reactor cavity, and various administrative controls described in your September 22, 2006 letter, sufficiently addressed our safety concerns for the remaining planned head lift for the current refuel outage.
We request that you immediately notify me at (630) 829-9700 if your understanding differs from that set forth above or if, for any reason, you intend to change, deviate from, or not complete any of the actions documented in your September 22, 2006 letter, as modified or bounded by your current head drop analysis, prior to the change or deviation.
However, please note that additional interaction is necessary to completely resolve the issue for the longer term. Specifically, our inspection of this issue exited with an unresolved item that remains under evaluation with respect to the plants licensing and design bases.
In accordance with 10 CFR 2.390 of the NRCs Rules of Practice, a copy of this letter will be made available electronically for public inspection in the NRC Public Document Room or from
M. Nazar the Publically Available Records (PARS) component of NRCs document system (ADAMS),
accessible from the NRC Web site at http://www.nrc.gov/reading-rm/adams.html (the Public Electronic Reading Room).
Sincerely,
/RA/
Cynthia D. Pederson, Director Division of Reactor Safety Docket Nos. 50-315; 50-316 License Nos. DPR-58; DPR-74 cc:
M. Peifer, Site Vice President L. Weber, Plant Manager S. Simpson, Regulatory Affairs Manager G. White, Michigan Public Service Commission L. Brandon, Michigan Department of Environmental Quality -
Waste and Hazardous Materials Division Emergency Management Division MI Department of State Police State Liaison Officer, State of Michigan
M. Nazar the Publically Available Records (PARS) component of NRCs document system (ADAMS),
accessible from the NRC Web site at http://www.nrc.gov/reading-rm/adams.html (the Public Electronic Reading Room).
Sincerely,
/RA/
Cynthia D. Pederson, Director Division of Reactor Safety Docket Nos. 50-315; 50-316 License Nos. DPR-58; DPR-74 cc:
M. Peifer, Site Vice President L. Weber, Plant Manager S. Simpson, Regulatory Affairs Manager G. White, Michigan Public Service Commission L. Brandon, Michigan Department of Environmental Quality -
Waste and Hazardous Materials Division Emergency Management Division MI Department of State Police State Liaison Officer, State of Michigan DISTRIBUTION:
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