ML101310029
| ML101310029 | |
| Person / Time | |
|---|---|
| Site: | Robinson  |
| Issue date: | 06/09/2010 |
| From: | Orf T J Plant Licensing Branch II |
| To: | McCartney E Carolina Power & Light Co |
| Orf, T J, NRR/DORL/301-415-2788 | |
| References | |
| GL-04-002, TAC MC4709 | |
| Download: ML101310029 (3) | |
Text
UNITED NUCLEAR REGULATORY WASHINGTON, D.C. 20555-0001 June 9, 2010 Mr. Eric McCartney, Vice President Carolina Power &Light Company B. Robinson Steam Electric Plant, Unit NO.2 3581 West Entrance Road Hartsville, South Carolina 29550 GENERIC LETTER 2004-02 SUPPLEMENTAL RESPONSE -H.B. ROBINSON STEAM ELECTRIC PLANT, UNIT 2 (TAC NO. MC4709)
Dear Mr. McCartney:
By letters dated March 7, 2008; December 17, 2008; and March 30, 2010; Carolina Power & Light Company, now doing business as Progress Energy Carolinas (PEC), Inc., submitted supplemental responses to Generic Letter (GL) 2004-02, "Potential Impact of Debris Blockage on Emergency Recirculation during Design Basis Accidents at Pressurized-Water Reactors," for H.B. Robinson Steam Electric Plant, Unit NO.2 (HBRSEP).
The last two submittals were made in response to U.S. Nuclear Regulatory Commission (NRC) requests for additional information dated July 25,2008, and December 3,2009. The NRC staff has reviewed PEC's submittals with a process that involved a detailed review by a team of 10 subject matter experts, with focus on the review areas described in the NRC's "Content Guide for Generic Letter 2004-02 Supplemental Responses" (Agencywide Documents Access and Management System Accession No. ML073110389).
The review process also included a separate review of PEC's submittal informed by inputs from the subject matter experts that focused on whether PEC has demonstrated overall that PEC's corrective actions for GL 2004-02 are adequate.
The NRC staff has no further questions for PEC at this time regarding PEC's planned methods for completion of actions to fully address GL 2004-02, as described in its response dated March 30, 2010. Because not all of the tests and evaluations described in PEC's responses to GL 2004-02 have been completed, the NRC staff understands that PEC plans to report the results of these activities to the NRC by September 30, 2010. Should the planned testing and evaluations indicate that any additional actions are needed to address GL 2004-02, the NRC staff expects that descriptions of planned actions and expected completion dates would be provided by September 30, 2010, as well. The NRC has not issued a final safety evaluation (SE) on WCAP-16793-NP, "Evaluation of Long-Term Cooling Considering Particulate, Fibrous, and Chemical Debris in the Recirculating Fluid." The NRC staff has reviewed the GL 2004-02 submittals for HBRSEP and determined that PEC currently intends to rely on the conclusions reached in WCAP-16793-NP.
Assuming disposition of WCAP-16793-NP results in an NRC staff issuance of an SE, the NRC intends to send a letter requesting that PEC confirm whether it still intends to rely on the conclusions reached in WCAP-16793-NP for HBRSEP. In addition, the letter will likely request a response within 60 days describing: the means that PEC used to determine the amount of debris that bypasses the emergency core cooling system strainer, E. -2 the fiber loading expected per fuel assembly for the cold-leg and hot-leg break scenarios based on information available as of the date of the letter, the available head loss margins with bases for the cold-leg and hot-leg break scenarios using the WCAP-16793 acceptance criteria, and 4. PEC's planned actions for HBRSEP should it exceed an acceptance criterion.
The NRC staff will notify PEC of the expected timeline for any needed actions at the time the SE is issued, or will notify PEC of expectations for additional licensee actions should an SE not be issued. The NRC staff is not requesting any information from PEC on this subject at this time. If you have any further questions on this matter, please contact me at 301-415-2788.
Sincerely, Tracy Orf, Project Manager Plant Licensing Branch II Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-261 Distribution via Listserv E. -2the fiber loading expected per fuel assembly for the cold-leg and hot-leg break scenarios based on information available as of the date of the letter, the available head loss margins with bases for the cold-leg and hot-leg break scenarios using the WCAP-16793 acceptance criteria, and PEC's planned actions for HBRSEP should it exceed an acceptance criterion.
The NRC staff will notify PEC of the expected timeline for any needed actions at the time the SE is issued, or will notify PEC of expectations for additional licensee actions should an SE not be issued. The NRC staff is not requesting any information from PEC on this subject at this time. If you have any further questions on this matter, please contact me at 301-415-2788.
Sincerely, IRA! Tracy Orf, Project Manager Plant Licensing Branch II Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-261 Distribution via Listserv DISTRIBUTION:
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