ML20054H678
| ML20054H678 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 06/22/1982 |
| From: | Sinclair J VERMONT YANKEE NUCLEAR POWER CORP. |
| To: | Vassallo D Office of Nuclear Reactor Regulation |
| References | |
| FVY-82-74, NUDOCS 8206240323 | |
| Download: ML20054H678 (1) | |
Text
VERMONT YAN KEE NUCLEAR POWER CORPORATION r
SEVENTY SEVEN GROVE STREET 2.C.2.1 RUTLAND, VERMONT 05701 FVY 82-74 R EPLY TO:
June 22, 1982 ENGINEERING OFFICE 1671 WORCESTER ROAD FRAMINGH AM. M ASSACH USETTS 01701
'"" "" * "'***~*'
United States Nuclear Regulatory Commission Washington, D. C. 20555 Attention:
Orfice of Nuclear Reactor Regulation Mr. Domenic B. Vassallo, Chief Operating Reactors Branch #2 Division of Licensing
References:
(a ) Licence No. DPR-28 (Docket No. 50-271)
(b) Letter, USNRC to VYNPC, dated May 3, 1982
Subject:
Operation of Purge and Vent Valves Under Inerted Conditions
Dear Sir:
Reference (b) informed us that our proposed method of operation of purge and vent valves under inerted conditions was conditionally accepted. You stated that you have information from the valve manufacturer, that valve SB-16-19-9 was in a non-approved orientation and, as a result, may experience high torques under LOCA flow conditions. We have since corrected this condition by re-orienting this valve to an approved orientation.
Additionally, valve SB-16-19-8 was found to be in questionable configuration and was also re-oriented to an approved orientation.
It should be noted that prior to re-orienting these valves, they were administrative 1y maintained closed, and thus, the potential for experiencing high torques was kept to an absolute minimum.
Reference (b) also requested Vermont Yankee to provide an estimated maximum number of hours per year that we expect to purge (or vent), as well as the estimated amount of radioactivity release during the time required to I
close the purge and vent valves following a LOCA. It is presently estimated that this radiological analysis will be complete by August 1, 1982. We believe it is only prudent that we base our estimated purge (or vent) time on the results of this analysis. Until such time as this issue of " allowable hours per year," is resolved. Vermont Yankee will continue to administrative 1y insure that the purge and vent valves are normally maintained in a closed position unless allowed to be open per the Station Technical Specifications.
We trust that this information is acceptable; however, should you have further questions, please do not hesitate to contact us.
Very truly yours, VERMONT YANKEE NUCLEAR POWER CORPORATION h.
8206240323 820622 QI. B* Sinclair I
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