ML20066C261
| ML20066C261 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 12/31/1990 |
| From: | Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML20066C263 | List: |
| References | |
| 90-779, NUDOCS 9101090398 | |
| Download: ML20066C261 (2) | |
Text
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1 YIltOINIA l$1,1 CTHIC AN1) POWCit COMI'ANY Iticanoxo,V HOINIA 002G1 December 31,1990 U.S. Nuclear Regulatory Commission Serial No.90-779 Attention: Document Control Desk NL&P/JBL:]bl R0 Washington, D.C. 20555 Docket Nos.
50 338 50 339 License Nos. NPF-4 NPF-7 Gentlemen:
VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION UNITS 1 AND 2 SUPPLEMENT TO PROPOSED TECHNICAL SPECIFICATIONS CH ANGE REQUEST - CONTAINMENT ISOL ATION V ALV.ES On February 23,1989, Virginia Electric and Power Company requested a license amendment regarding certain containment isolation valves. Subsequent discussions with the NRC North Anna Project Manager have indicated that one aspect of our proposed change request is unacceptable.
'.e NRC staff disagrees with our determination that certain containment penetrations, which are identified as part of a
" closed" system, are not subject to the testing requirements of 10 CFR 50, Appendix J.
Therefore, we are supplementing our previous submittal by withdrawing that aspect of the request. Instead, we request that these penetrations be considered exempt from the Type C penalty on the Type A test results. This is consistent with the way other
" water-filled" penetrations are treated with respect to Appendix J.
The subject valves are those valves which control service water flow to and from the Recirculation Spray Heat Exchangers (i.e., MOV-SW103A,. B, C, and D and MOV-SW104A, B, C, and D for Unit 1 and MOV SW203A, B, C, and D and MOV SW204A, B, C, and D for Unit 2). These valves are outside of containment and the service water in the piping system does not communicate with the containment atmosphere or any other system inside containment.
As identified in our original submittal, these service water valves receive an "open" signal on a Containment Depressurization Actuation (CDA) signal. Hence, in addition to being part of a closed system, these valves are water filled under accident conditions. Therefore, similar to the discussion of water filled penetrations provided in the original change request, we have added the ## footnote symbol to these valves in Table 3.6-1, Containment Isolation Valves. The ## footnote indicates that the Type C leakage rate penalty is not to be added to the Type A test results. The discussion for justif: cation of this change is the same as for the other " water-filled" penetrations provided as part of our February 23,1989 submittal.
91o109o398 901231
{DR ADoCK o5oo g 8 080135
f.
-This supplemental information is being provided so that our proposed Technical' 4
Specification change request can be approved by the NRC prior to the end of the next North Anna Unit 1 refueling outage-(scheduled for March 26, 1991).
-The supplemental Technical Specifications change pages for North Anna Units 1 and 2 are prnvided in Attachments 1 and 2, respectively.
We have reviewed this submittal with respect to the MERITS version of the North Anna Technical Specifications and have. determined that no change is required to the MERITS submittal.-
This supplemental change has been rev!ewed by the' Station Nuclear Safety and Operating Committee and has been determined not to involve an unreviewed safety' question as defined in 10 CFR 50.59. The supplementalinformation does not change the results of our no significant. hazards consideration determination previously submitted. Therefore, the original no significant hazards consideration determination
.emains bounding.
Should you have any questions or require additionalinformation, please contact us.
~
Very tru k
' yours, q
_\\
W. L. stewart Senior Vice President Nuclear Attachments cc:
U.S. Nuclear Regulatory Commission Region ll =
101 Marietta Street, N.W.
Suite 2900-Atlanta, Georgia 30323 Mr. M. S. Lesser NRC Senior Resident inspector
-North Anna Power Station Commissioner
-Department of Health Room 400 109 Governor Street Richmond, Virginia 23219 i.
s
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