ML062770017
| ML062770017 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 09/25/2006 |
| From: | Gerald Bichof Virginia Electric & Power Co (VEPCO) |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 06-674 | |
| Download: ML062770017 (5) | |
Text
I I VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 September 25, 2006 U.S. Nuclear Regulatory Commission Serial No.06-674 Attention: Document Control Desk NL&OS/GSS RO Washington, D.C. 20555 Docket Nos.
50-338 50-339 License Nos. NPF-4 NPF-7 VIRGINIA ELECTRIC AND POWER COMPANY (DOMINION)
NORTH ANNA POWER STATION UNITS 1 AND 2 ANNUAL SUBMITTAL OF TECHNICAL SPECIFICATION BASES CHANGES PURSUANT TO TECHNICAL SPECIFICATION 5.5.13.d Pursuant to Technical Specifications 5.5.13.d, "Technical Specification (TS) Bases Control Program," Dominion hereby submits the changes to the Bases of the Technical Specifications implemented since October 2005.
Each Bases change to the Technical Specifications was reviewed and approved by the Station Nuclear Safety and Operating Committee.
It was determined that these changes did not require a change to the Technical Specifications or license, or involve a change to the UFSAR or Bases that required NRC prior approval pursuant to 10 CFR 50.59. A summary of each Bases change implemented since October 2005 is provided in Attachment 1. Attachment 2 is a compact disc of the entire TS Bases through Revision 26 for your information.
If you should have any questions regarding this submittal, please contact Mr. Thomas Shaub at (804) 273-2763.
Sincerely, G.IT. Bischof Vice President - Nuclear Engineering Attachments
- 1. Summary of Bases Changes
- 2. Current Bases through Revision 26 to Technical Specification Bases (CD)
Commitments made in this letter: None Metf
Serial No.06-674 Tech Spec Bases Changes - Rev 26 cc:
U. S. Nuclear Regulatory Commission Region II Sam Nunn Atlanta Federal Center 61 Forsyth Street, SW Suite 23T85 Atlanta, Georgia 30303 Mr. J. T. Reece (without Attachment 2)
NRC Senior Resident Inspector North Anna Power Station Mr. J. E. Reasor, Jr. (without Attachment 2)
Old Dominion Electric Cooperative Innsbrook Corporate Center 4201 Dominion Blvd.
Suite 300 Glen Allen, Virginia 23060 Mr. S. R. Monarque NRC Project Manager U. S. Nuclear Regulatory Commission One White Flint North 11555 Rockville Pike Mail Stop 8-H12 Rockville, Maryland 20852
ATTACHMENT 1 Serial No.06-674
SUMMARY
OF BASES CHANGES FROM OCTOBER 2005 TO OCTOBER 2006 Virginia Electric and Power Company (Dominion)
North Anna Power Station Units 1 and 2
Serial No.06-674 Tech Spec Bases Changes - Rev 26 Summary of Bases Changes Revise Definition of Bank Fully Inserted for TS Bases 3.1.9 (Bases - TS 3.1.9 Background)
This Bases change revised the Bases for TS 3.1.9 to permit the performance of the rod swap measurements with the test banks inserted to 2 steps withdrawn rather than 0 steps withdrawn (fully inserted). The change is based upon an engineering evaluation for performing rod swap measurements. The term "fully inserted" redefined to be from 0 to 2 steps withdrawn for measurements using the rod swap technique.
Clarification of RCS Vent Requirements (Bases - TS 3.4.12 Background - RCS Vent Requirements)
This Bases change clarified the Bases for TS 3.4.12, "RCS Vent Requirements" to state that a PORV Block Valve is maintained in the open position and verified open through administrative controls in lieu of being blocked open in order to establish an RCS vent path to prevent overpressurization.
The PORV Block Valve is a motor operated valve maintained in the open position and, as such, is not required to be subject to an active failure that would close the valve (e.g., spurious operation).
Clarification of Single Failure Protection for TS 3.7.3 (Bases - TS 3.7.3 LCO, Background, and Action E.1)
This Bases change revised the Bases for TS 3.7.3 LCO, Background and Action E.1 to clarify the system configuration for single failure protection of the Main Feedwater System Motor Operator Valves. The change clarified what constitutes a flow path to ensure single failure protection.
Clarification of Underground Fuel Oil Storage Tank Requirements (Bases - TS 3.8.3. Actions A.1, A.2, A.3, and A.4)
This Bases change deleted reference to the ASME Code, Section X1 requirements when performing an inspection of the underground fuel oil storage tanks as referenced.
in the Bases for TS 3.8.3, "Diesel Fuel Oil and Starting Air." The Bases for TS 3.8.3 states that "Every ten years a fuel oil storage tank must be inspected for integrity under the requirements of ASME Code, Section Xl."
Based upon the results of an engineering evaluation, it was determined that Section XI requirements are not applicable to the inspection of the underground fuel oil storage tanks.
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Serial No.06-674 Tech Spec Bases Changes - Rev 26 Revised Frequency for TADOT of P-4 Interlock Surveillance Frequency (Bases -
TS 3.3.2 Applicable Safety Analysis, LCO and Applicability for Item 8.a.
"Engineered Safety Feature Actuation System Interlocks-Reactor Trip, P-4, SR 3.3.2.7 and SR 3.3.2.10)
These changes revised the surveillance requirement frequency and the associated Bases of the TADOT of the Reactor Trip P-4 ESFAS Interlock from "Once per reactor trip breaker cycle" to "18 months," and expanded upon the design bases of the ESFAS P-4 interlock. The changes are consistent with WOG Standard Technical Specification Change Traveler TSTF-444-T, Rev 1 associated with the P-4 interlock.
The Bases changes noted above were submitted to the NRC on March 1, 2005 and incorporated into the Bases upon NRC approval of the associated Technical Specification changes (Amendments 244 for Unit 1 and 225 for Unit 2 issued on October 24, 2005).
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