ML092010499
| ML092010499 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 07/16/2009 |
| From: | Baxter D Duke Energy Carolinas |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| GL-04-002 | |
| Download: ML092010499 (5) | |
Text
Duke DAVE BAXTER Energy.
Vice President Oconee Nuclear Station Duke Energy ON01 VP / 7800 Rochester Highway Seneca, SC 29672 864-873-4460 864-873-4208 fax dabaxter@dukeenergy. com July 16, 2009 U. S. Nuclear Regulatory Commission Washington, DC 20555-0001 ATTENTION:
Document Control Desk
SUBJECT:
Duke Energy Carolinas, LLC (Duke)
Oconee Nuclear Station (ONS), Units 1, 2, & 3 Docket Nos. 50-269, 50-270, & 50-287 NRC Generic Letter 2004-02 "Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized Water Reactors" On September 13, 2004, the Nuclear Regulatory Commission (NRC) issued Generic Letter (GL) 2004-02, "Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized Water Reactors." The GL requested that all pressurized-water reactor (PWR) licensees (1) evaluate the adequacy of the emergency sump recirculation function with respect to potentially adverse effects associated with post-accident debris, and (2) implement any plant modifications determined to be necessary.
During the course of evaluating the adequacy of ONS' Emergency Core Cooling Systems (ECCS) and Building Spray (BS) Systems with respect to Generic Safety Issue 191 (GSI-191),
ONS identified corrective actions necessary to resolve all NRC concerns. Some of those corrective actions were identified as commitments in Duke letter dated September 1, 2005, and updated by letter of June 28, 2006. Other commitments were identified in Duke letter dated December 19, 2007. Three additional corrective actions were identified during final reviews of the GL response that were not included in previous Duke correspondence to NRC. Those corrective actions were provided as additional commitments in Duke's letter dated February 29, 2008.
One of the commitments in Duke's letter dated February 29, 2008, stated that Oconee would address the NRC's "draft" comments on WCAP 16793-NP Rev. 0 within 90 days of receipt of "final" NRC comments. The NRC has been working through NEI to resolve outstanding concerns with the WCAP. Duke has been advised by the Staff to revise the existing commitment to review and respond to changes in WCAP 16793-NP as reflected in Rev. 1, which is expected to be issued to the industry later this year. The NRC expects to issue their Safety Evaluation (SE) by February, 2010. Oconee therefore agrees to address those changes within 90 days of receipt of the NRC's SE for the revised WCAP, as reflected in Enclosure 1.
www. duke-energy.com
, Nuclear Regulatory Commission July16, 2009 Page 2 Duke understands that the NRC staff will consider this additional information and will issue a letter during calendar year 2010 assessing the overall adequacy of Duke's corrective actions for GL 2004-02.
If there are any-questions, please contact Russ Oakley, Oconee Regulatory Compliance, at 864-873-3829.,
I declare that under penalty of perjury that the foregoing is true and correct. Executed on July 16, 2009.
Sincerely, Dave axter, Site Vice President Oconee Nuclear Station Enclosure
, I&4uclear Regulatory Commission July16, 2009 Page 3 xc:
Mr. Luis Reyes, Region II Administrator U.S. Nuclear Regulatory Commission Sam Nunn Atlanta Federal Center, 23 T85 61 Forsyth St., SW Atlanta, GA 30303-8931 Mr. John Stang, Project Manager (ONS)
U.S. Nuclear Regulatory Commission 11555 Rockville Pike Mail Stop 0-8 G9A Rockville, MD 20852-2738 Mr. Eric Riggs, NRC Senior Resident Inspector (Acting)
Oconee Nuclear Station
- Nuclear Regulatory Commission July 16, 2009 Page 1 ONS COMMITMENTS
- Nuclear Regulatory Commission July 16, 2009 Page 2 ONS GL 2004-02 Commitments Commitment No.
Description Completion Date 1
Evaluate and Respond to 90 days after receipt of NRC's Safety Changes made in WCAP Evaluation for WCAP 16793-NP Rev. 1.
16793-NP Rev. 1.