ML080650485
| ML080650485 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 03/10/2008 |
| From: | Siva Lingam NRC/NRR/ADRO/DORL/LPLII-1 |
| To: | Christian D Virginia Electric & Power Co (VEPCO) |
| Lingam, Siva NRR/DORL 415-1564 | |
| References | |
| TAC MD6812, TAC MD6813 | |
| Download: ML080650485 (4) | |
Text
March 10, 2008 Mr. David A. Christian President and Chief Nuclear Officer Virginia Electric and Power Company Innsbrook Technical Center 5000 Dominion Boulevard Glen Allen, VA 23060-6711
SUBJECT:
SURRY POWER STATION, UNIT NOS. 1 AND 2, REQUEST FOR ADDITIONAL INFORMATION (RAI) REGARDING THE REVISION TO VARIOUS SETTING LIMITS AND THE OVERTEMPERATURE T/OVERPOWER T TIME CONSTANTS (TAC NOS. MD6812 AND MD6813)
Dear Mr. Christian:
By letter dated September 19, 2007, Virginia Electric and Power Company (the licensee) proposed technical specification (TS) changes to revise various TS setting limits and the overtemperature T/overpower T time constants in TS 2.3 and TS 3.7 for Surry Power Station, Unit Nos. 1 and 2. The Nuclear Regulatory Commission (NRC) staff is reviewing the submittal and has determined that additional information is required to complete its evaluation.
The NRC staffs RAI is enclosed. The licensee is required to provide a response to the RAI within 30 days.
Sincerely,
/RA/
Siva P. Lingam, Project Manager Plant Licensing Branch II-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-280 and 50-281
Enclosure:
RAI cc w/encl: See next page
- transmitted by memo dated OFFICE NRR/LPL2-1/PM NRR/LPL2-1/LA NRR/DE/EICB/BC NRR/LPL2-1/BC NAME SLingam MO=Brien WKemper MWong DATE 3/4/08 3/10/08 3/4/08*
3/10/08
Enclosure REQUEST FOR ADDITIONAL INFORMATION REGARDING TECHNICAL SPECIFICATION CHANGES TO REVISE VARIOUS SETTING LIMITS AND THE OVERTEMPERATURE T/OVERPOWER T TIME CONSTANTS SURRY POWER STATION, UNIT NOS. 1 AND 2 DOCKET NOS. 50-280 AND 50-281 By application dated September 19, 2007 (Agencywide Documents Access and Management System (ADAMS) Accession Number ML072681096), Virginia Electric and Power Company (the licensee) proposed license amendment to change Surry Power Station, Unit Nos. 1 and 2 (Surry 1 and 2) Technical Specifications (TSs). The proposed change revises various TS setting limits and the overtemperature T/overpower T time constants in TSs, Sections 2.3 and 3.7.
To complete our review of the proposed TS changes, the Nuclear Regulatory Commission (NRC) staff requests the licensees response to the following:
(1), Page 2, the first full paragraph states that for complex tirp functions or functions which had limited margin with respect to the safety analysis limit, other calculational methods were used. Identify which methods were used and their justification.
(2), Page 4, first item 3, states that the distance between the actual trip setpoint and the actual allowable value (AV) is equal to the Channel Operational Test (COT) error components of the total loop uncertainty without any excessive margin included. This statement implies that margin is included in determining AV. Since the licensee is using AV as an acceptable as-found band, the addition of margin to determine the AV will mask the COT testing result, identify all instances where margin is included in determining AVs and justify this deviation from the guidance provided in Regulatory Issue Summary (RIS) 2006-17.
(3), Insert C for Table 3.7-1 and Insert D for Tables 3.7-2, 3.7-3, and 3.7-4, state that the channel should be brought back to within its predefined calibration tolerance before returning the channel to service. The methodology used to determine the calibration tolerance is specified in a document controlled under Title 10 of the Code of Federal Regulations (10 CFR), Part 50, Section 50.59 (10 CFR 50.59). Provide the methodology used to determine the calibration tolerance for the NRC staffs review as this value is used for as-left tolerance defined in RIS 2006-17.
(4)
For all instances where margin has been included in the determination of an AV, a second note should be included in Tables 3.7-1 through 3.7-4 to define the operability of the instrument channel as discussed in RIS 2006-17. Provide the discussion of how this requirement is met by Surry 1 and 2.
(5)
Table 3.7-1, functions 6 and 17 do not have an asterisk by them which implies that Insert C does not apply to them. Justify this exclusion.
Surry Power Station, Units 1 & 2 cc:
Mr. David A. Christian President and Chief Nuclear Officer Virginia Electrical and Power Company Innsbrook Technical Center 5000 Dominion Boulevard Glen Allen, VA 23060-6711 Ms. Lillian M. Cuoco, Esq.
Senior Counsel Dominion Resources Services, Inc.
Building 475, 5th Floor Rope Ferry Road Waterford, Connecticut 06385 Mr. Donald E. Jernigan Site Vice President Surry Power Station Virginia Electric and Power Company 5570 Hog Island Road Surry, Virginia 23883-0315 Senior Resident Inspector Surry Power Station U. S. Nuclear Regulatory Commission 5850 Hog Island Road Surry, Virginia 23883 Chairman Board of Supervisors of Surry County Surry County Courthouse Surry, Virginia 23683 Dr. W. T. Lough Virginia State Corporation Commission Division of Energy Regulation Post Office Box 1197 Richmond, Virginia 23218 Dr. Robert B. Stroube, MD, MPH State Health Commissioner Office of the Commissioner Virginia Department of Health Post Office Box 2448 Richmond, Virginia 23218 Office of the Attorney General Commonwealth of Virginia 900 East Main Street Richmond, Virginia 23219 Mr. Chris L. Funderburk, Director Nuclear Licensing & Operations Support Dominion Resources Services, Inc.
Innsbrook Technical Center 5000 Dominion Blvd.
Glen Allen, Virginia 23060-6711