ML020420523

Request for Additional Info. Re Section 3.7.9 of ITS

ML020420523
Person / Time
Site:	North Anna
Issue date:	02/11/2002
From:	Stephen Monarque NRC/NRR/DLPM
To:	Christian D Virginia Electric & Power Co (VEPCO)
Monarque S, NRR/DLPM, 415-1544
References
TAC MB1451, TAC MB1452
Download: ML020420523 (4)

Text

February 11, 2002 Mr. David A. Christian Senior Vice President and Chief Nuclear Officer Virginia Electric and Power Company Innsbrook Technical Center-2SW 5000 Dominion Blvd.

Glen Allen, Virginia 23060-6711

SUBJECT:

NORTH ANNA POWER STATION, UNITS 1 AND 2: REQUEST FOR ADDITIONAL INFORMATION REGARDING SECTION 3.7.9 OF THE IMPROVED TECHNICAL SPECIFICATIONS (ITS) (TAC NOS. MB1451 AND MB1452)

Dear Mr. Christian:

The staff reviewed your application dated December 11, 2000, to change the format and content of the Current Technical Specifications to be consistent with NUREG-1431, Standard Technical Specifications - Westinghouse Plants, Revision 1, and certain generic changes to the NUREG. On the basis of our review of the proposed changes for ITS Section 3.7.9, Ultimate Heat Sink, we find that additional information identified in the paragraphs below is required in order for the staff to complete this review.

1) When the term steam dump is referred to in the submittal, does this refer to the use of the turbine bypass valves to route steam directly into the condenser? Describe the systems, sequence of events, success criteria, and automatic/manual operations required for short-term decay heat removal using the Decay Heat Release Valve (DHRV). After short-term heat removal has been accomplished using the DHRV, is long-term heat removal initiated in the same manner and under the same plant conditions as other short-term heat removal scenarios (i.e., condenser cooling using circulating water)? If DHRV cooling was incorporated into the probabilistic risk assessment (PRA), describe how the PRA would be modified to accurately model the scenario of events, plant states, and required supporting equipment. If the DHRV is not modeled in the PRA, but a reduction in the Risk Achievement Worth (RAW) for the North Anna Reservoir is estimated, describe how the magnitude of the anticipated reduction in the RAW was estimated.

2) How long can North Anna Power Station continue to operate at full power if the temperature of the North Anna reservoir exceeds 95 degrees or if the water level of the reservoir falls below 244 Mean Sea Level? If the plant cannot operate at full power under the above conditions, can it operate at reduced power and, if so, at what power level?

Mr. David A. Christian Virginia Electric and Power Company is requested to provide a response to the staffs questions by February 19, 2002, to ensure the ITS amendment issuance date of April 1, 2002, can be achieved.

Sincerely,

/RA/

Stephen R. Monarque, Project Manager, Section 1 Project Directorate II Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-338 and 50-339 cc: See next page

Mr. David A. Christian Virginia Electric and Power Company is requested to provide a response to the staffs questions by February 19, 2002, to ensure the ITS amendment issuance date of April 1, 2002, can be achieved.

Sincerely,

/RA/

Stephen R. Monarque, Project Manager, Section 1 Project Directorate II Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-338 and 50-339 cc: See next page DISTRIBUTION:

PUBLIC NLe TMarsh RLaufer PDII-1 Rdg. (paper copy) OGC TLe KLandis ACRS EDunnington (paper copy) JGolla SMonarque SDinsmore MRubin Accession No. ML020420523 OFFICE PM:PDII/S1 LA :PDII/S2 SC(A):PDII-1 NAME SMonarque;mw EDunnington RLaufer DATE 02/08/02 02/08/02 02/11/02 OFFICIAL RECORD COPY

Mr. David A. Christian North Anna Power Station Virginia Electric and Power Company Units 1 and 2 cc:

Mr. C. Lee Lintecum Mr. David A. Heacock County Administrator Site Vice President Louisa County North Anna Power Station P.O. Box 160 P.O. Box 402 Louisa, Virginia 23093 Mineral, Virginia 23117-0402 Ms. Lillian M. Cuoco, Esq.

Senior Nuclear Counsel Mr. Richard H. Blount, II Dominion Nuclear Connecticut, Inc. Site Vice President Millstone Power Station Surry Power Station Building 475, 5th Floor Virginia Electric and Power Company Rope Ferry Road 5570 Hog Island Road Rt. 156 Surry, Virginia 23883-0315 Waterford, Connecticut 06385 Dr. W. T. Lough Robert B. Strobe, M.D., M.P.H.

Virginia State Corporation State Health Commissioner Commission Office of the Commissioner Division of Energy Regulation Virginia Department of Health P.O. Box 1197 P. O. Box 2448 Richmond, Virginia 23209 Richmond, Virginia 23218 Old Dominion Electric Cooperative Mr. William R. Matthews 4201 Dominion Blvd. Vice President - Nuclear Operations Glen Allen, Virginia 23060 Virginia Electric and Power Company Innsbrook Technical Center 5000 Dominion Boulevard Mr. Stephen P. Sarver, Director Glen Allen, Virginia 23060-6711 Nuclear Licensing & Operations Support Virginia Electric and Power Company Innsbrook Technical Center 5000 Dominion Blvd.

Glen Allen, Virginia 23060-6711 Office of the Attorney General Commonwealth of Virginia 900 East Main Street Richmond, Virginia 23219 Senior Resident Inspector North Anna Power Station U.S. Nuclear Regulatory Commission 1024 Haley Drive Mineral, Virginia 23117