ML052020171
| ML052020171 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 07/15/2005 |
| From: | Korsnick M Constellation Energy Group |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| GL-04-002, TAC MC4687 | |
| Download: ML052020171 (3) | |
Text
Maria Korsnick Vice President 1503 Lake Road Ontario, New York 14519-9364 585.771.3494 585.771.3943 Fax maria.korsnicktconstellation.com Constellation Energy R.E. Ginna Nuclear Power Plant July 15, 2005 U. S. Nuclear Regulatory Commission Washington, DC 20555
SUBJECT:
R.E. Ginna Nuclear Power Plant Docket No. 50-244 Response to NRC Request for Additional Information Re: NRC Generic Letter 2004-02, "Potential Impact of Debris Blockage on Emeraencv Recirculation during! Design Basis Accidents at Pressurized-Water Reactors" (TAC No.
REFERENCES:
(a)
Letter from Ms. Donna Skay (NRC) to Mrs. Mary G. Korsnick (Ginna LLC), dated June 2, 2005, R.E. Ginna Nuclear Power Plant - Request for Additional Information (RAI) Related to Generic Letter 2004-02, "Potential Impact of Debris Blockage on Emergency Sump Recirculation at Pressurized-Water Reactors" (TAC No. MC4687)
(b)
Letter from Mrs. Mary G. Korsnick (Ginna LLC) to Ms. Donna M. Skay (NRC), dated March 7, 2005, 90 Day Response to NRC Generic Letter 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation during Design Basis Accidents at Pressurized-Water Reactors (c)
NRC Generic Letter 2004-02: Potential Impact of Debris Blockage on Emergency Recirculation during Design Basis Accidents at Pressurized-Water Reactors By letter dated June 2, 2005 (Reference a), you requested additional information regarding R.E. Ginna Nuclear Power Plant, LLC's (Ginna LLC's) 90-day response (Reference b) to Generic Letter (GL) 2004-02 (Reference c). The requested information is provided below.
4NAY I M I 3560
Document Control Desk July 15, 2005 Page 2 Reouested Information Your 90-day response indicated that your analysis will be completed by September 1, 2005, but did not discuss the evaluation of chemical and downstream effects. Although the GL did not specifically request that the evaluation of chemical and downstream effects be discussed in the 90-day response, please discuss your plans and schedule for evaluiating chemical and downstream effects and verify i whether your September 1, 2005, response will include an evaluation of these effects.
Ginna LLC's Response Ginna LLC is currently pursuing an "active" self-cleaning strainer as part of our GL 2004-04 resolution.
One of the design criteria Ginna LLC has established with the vendor of the self-cleaning strainer is for the self-cleaning strainer to be capable of keeping the active strainer flow clean in the event chemical precipitation occurs. Preliminary testing done in January 2005 indicates that this criterion can be easily met. A final testing that meets the quality standards of Ginna LLC is currently scheduled to occur in the summer of 2005. At this time, it is unknown whether the vendor report documenting the results of this testing will be available in time to be included in the September 1, 2005 response to the Generic Letter.
As part of the design evaluation of the replacement sump strainer, Ginna LLC will also document that the replacement strainer adequately maintains the functionality of the Emergency Core Cooling System/Reactor Coolant System downstream components.. To determine the bypass flow from the active strainer, a flow test that meets the Ginna LLC quality standard will be performed by the vendor. This testing is also scheduled to occur in the summer of 2005, and again published results may not be available in time to support the September 1, 2005 Generic Letter response. Following completion of the bypass flow test, the methodologies of NEI 04-07 and WCAP-16406-P will be used to evaluate the downstream effects of debris bypass.
The completion date to document the work described above is scheduled for December 30, 2005.
Should you have questions regarding the information in this submittal, please contact George Wrobel at (585) 771-3535 or george.wrobeleconstellation.com.
Very truly yours Mary G. Korsnick
Document Control Desk July 15, 2005 Page 3 STATE OF NEW YORK TO WIT:
COUNTY OF WAYNE I, Mary G. Korsnick, being duly sworn, state that I am Vice President - R.E. Ginna Nuclear Power Plant, LLC (Ginna LLC), and that I am duly authorized to execute and file this request on behalf of Ginna LLC.
To the best of my knowledge and belief, the statements contained in this document are true and correct.
To the extent that these statements are not based on my personal knowledge, they are based upon information provided by other Ginna LLC employees and/or consultants. Such information has been reviewed in accordance with company practice and I believe it to be reliable.
Subscribed and sworn before me a Notary Public in and for the State of New York and County of this /5' day of 2005.
WITNESS my Hand and Notarial Seal:
Notary Public My Commission Expires:
SHARON L MIULER Date Nobly piStale of pe(Yrk P4# ~no. 01MKR17M cc:
S. J. Collins, NRC P. D. Milano, NRC Resident Inspector, NRC Peter R. Smith New York State Energy, Research, and Development Authority 17 Columbia Circle Albany, NY 12203-6399 Paul Eddy NYS Department of Public Service 3 Empire Plaza, I 0th Floor Albany, NY 12223-1350