ML050930030

Units 1 & 2, Request for Additional Information,Bulletin 2003-01 Potential Impact of Debris Blockage on Emergency Sump Recirculation at Pressurized-Water Reactors.

ML050930030
Person / Time
Site:	Surry, North Anna
Issue date:	03/31/2005
From:	Stephen Monarque NRC/NRR/DLPM/LPD2
To:	Christian D Virginia Electric & Power Co (VEPCO)
Monarques, S R, NRR/DLPM, 415-1544
References
BL-03-001
Download: ML050930030 (4)

Text

March 31, 2005 Mr. David A. Christian Sr. Vice President and Chief Nuclear Officer Virginia Electric and Power Company Innsbrook Technical Center 5000 Dominion Blvd.

Glen Allen, Virginia 23060-6711

SUBJECT:

NORTH ANNA AND SURRY POWER STATIONS, UNITS 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION REGARDING NRC BULLETIN 2003-01, POTENTIAL IMPACT OF DEBRIS BLOCKAGE ON EMERGENCY SUMP RECIRCULATION AT PRESSURIZED-WATER REACTORS

Dear Mr. Christian:

By letter dated August 7, 2003, Virginia Electric and Power Company (VEPCO) submitted its 60-day response to NRC Bulletin 2003-01 for the North Anna and Surry Power Stations, Units 1 and 2. Based on its review of the August 7, 2003 letter, the NRC staff issued a request for additional information (RAI) on September 2, 2004. On October 29, 2004, VEPCO provided its response to the NRC staffs RAI. Based on its review of the October 29, 2004 response, the NRC staff has determined that additional information is required in order for the NRC staff to complete its review.

Our questions are provided in the Enclosure. The NRC staff requests a response to the RAI within 30 days of the date of this letter.

Sincerely,

/RA/

Stephen R. Monarque, Project Manager, Section 1 Project Directorate II Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-280, 50-281, 50-338, and 50-339

Enclosure:

As stated

March 31, 2005 Mr. David A. Christian Sr. Vice President and Chief Nuclear Officer Virginia Electric and Power Company Innsbrook Technical Center 5000 Dominion Blvd.

Glen Allen, Virginia 23060-6711

SUBJECT:

NORTH ANNA AND SURRY POWER STATIONS, UNITS 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION REGARDING NRC BULLETIN 2003-01, POTENTIAL IMPACT OF DEBRIS BLOCKAGE ON EMERGENCY SUMP RECIRCULATION AT PRESSURIZED-WATER REACTORS

Dear Mr. Christian:

By letter dated August 7, 2003, Virginia Electric and Power Company (VEPCO) submitted its 60-day response to NRC Bulletin 2003-01 for the North Anna and Surry Power Stations, Units 1 and 2. Based on its review of the August 7, 2003 letter, the NRC staff issued a request for additional information (RAI) on September 2, 2004. On October 29, 2004, VEPCO provided its response to the NRC staffs RAI. Based on its review of the October 29, 2004 response, the NRC staff has determined that additional information is required in order for the NRC staff to complete its review.

Our questions are provided in the Enclosure. The NRC staff requests a response to the RAI within 30 days of the date of this letter.

Sincerely,

/RA/

Stephen R. Monarque, Project Manager, Section 1 Project Directorate II Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-280, 50-281, 50-338, and 50-339

Enclosure:

As stated Distribution: ACRS KLandis,Rgn2 DLPM DPR PUBLIC SMonarque AWang LWhitney PDII-1 Rdg. EDunnington EHackett DSolorio MKowal NGarrett GWilson OGC Rp KCotton CGratton Adams Accession No.: ML050930030 NRR-088 OFFICE PDII-1/PM PDII-2/LA SPLB/SC PDII-1/SC NAME SMonarque EDunnington DSolorio JNakoski DATE 03/30/05 03/30/05 03/30/05 03/31/05 OFFICIAL RECORD COPY

REQUEST FOR ADDITIONAL INFORMATION NRC BULLETIN 2003-01, "POTENTIAL IMPACT OF DEBRIS BLOCKAGE ON EMERGENCY SUMP RECIRCULATION AT PRESSURIZED-WATER REACTORS" NORTH ANNA AND SURRY POWER STATIONS, UNITS 1 AND 2 VIRGINIA ELECTRIC & POWER COMPANY By letter dated September 2, 2004, the NRC staff issued a request for additional information (RAI) to NRC Bulletin 2003-01 for the North Anna and Surry Power Stations, Units 1 and 2. In its RAI, the NRC staff requested that Virginia Electric and Power Company (VEPCO) provide a discussion of the Westinghouse Owners Group (WOG)-recommended compensatory measures that have been or will be implemented at North Anna and Surry, Units 1 and 2, including the evaluations or analyses used to determine which of the WOG-recommended changes were acceptable at North Anna and Surry, Units 1 and 2. VEPCO was also requested to provide a technical justification for those WOG-recommended compensatory measures that were not being implemented at North Anna and Surry, Units 1 and 2.

In its response dated October 29, 2004, VEPCO provided the following information.

The WOG recommendation was to implement the Sump Blockage Control Room Guideline (SBCRG) documented in Volume 2 to WCAP-16204, Revision 1 as an interim compensatory action to reduce the risk associated with sump blockage.

VEPCOs approach may be non-responsive in that it implies that the entirety of Volume I and Appendix A of Volume I to WCAP-16204, Revision 1, Evaluation of Potential ERG and EPG Changes to Address NRC Bulletin 2003-01 Recommendations (PA-SEE-0085) were not considered for its usefulness in further reducing risk from a sump clogging event. Although the 11 candidate operator actions (COAs) evaluated in Volume I of WCAP-16204, Revision 1 either may not be included in the SBCRG, may not be applicable to the North Anna or Surry plant designs, or may not be risk beneficial to North Anna or Surry, it is incumbent upon the licensee to provide technical justifications for not implementing them.

Therefore, VEPCO is requested to provide information that verifies the 11 COAs are included in the SBCRG. In addition, VEPCO is requested to provide a discussion on the plant-specific evaluations and verifications performed in order to justify the applicability and usability of the generic SBCRG for both North Anna and Surry. Finally, provide technical justification for any plant-specific deviations that do not implement any of the 11 COAs.

Enclosure

Virginia Electric and Power Company cc:

Ms. Lillian M. Cuoco, Esq. Office of the Attorney General Senior Counsel Commonwealth of Virginia Dominion Resources Services, Inc. 900 East Main Street Building 475, 5th Floor Richmond, Virginia 23219 Rope Ferry Road Waterford, Connecticut 06385 Mr. Chris L. Funderburk, Director Nuclear Licensing & Operations Support Mr. Donald E. Jernigan Innsbrook Technical Center Site Vice President Dominion Resources Services, Inc.

Surry Power Station 5000 Dominion Blvd.

Virginia Electric and Power Company Glen Allen, Virginia 23060-6711 5570 Hog Island Road Surry, Virginia 23883-0315 Mr. Jack M. Davis Site Vice President Senior Resident Inspector North Anna Power Station Surry Power Station Virginia Electric and Power Company U. S. Nuclear Regulatory Commission Post Office Box 402 5850 Hog Island Road Mineral, Virginia 23117-0402 Surry, Virginia 23883 Mr. C. Lee Lintecum Chairman County Administrator Board of Supervisors of Surry County Louisa County Surry County Courthouse Post Office Box 160 Surry, Virginia 23683 Louisa, Virginia 23093 Dr. W. T. Lough Old Dominion Electric Cooperative Virginia State Corporation Commission 4201 Dominion Blvd.

Division of Energy Regulation Glen Allen, Virginia 23060 Post Office Box 1197 Richmond, Virginia 23218 Senior Resident Inspector North Anna Power Station Dr. Robert B. Stroube, MD, MPH U.S. Nuclear Regulatory Commission State Health Commissioner 1024 Haley Drive Office of the Commissioner Mineral, Virginia 23117 Virginia Department of Health Post Office Box 2448 Richmond, Virginia 23218