ML20141K887

Forwards Category B Repts Re Util Re Failure of Both Torus Vacuum Breaker Block Valves to Operate on Test

ML20141K887
Person / Time
Site:	Oyster Creek
Issue date:	01/14/1971
From:	Mckinley J Advisory Committee on Reactor Safeguards
To:	Stratton W Advisory Committee on Reactor Safeguards
Shared Package
ML20091A092	List: IA-91-282, Forwards Written Statement Submitted by Sp Russo for ECCS Subcommittee Meeting on 770129,for Info.W/O Encl ML20141K026 ML20141K047 ML20141K056 ML20141K063 ML20141K066 ML20141K070 ML20141K076 ML20141K082 ML20141K091 ML20141K095 ML20141K121 ML20141K137 ML20141K141 ML20141K153 ML20141K163 ML20141K175 ML20141K185 ML20141K190 ML20141K359 ML20141K365 ML20141K368 ML20141K372 ML20141K375 ML20141K379 ML20141K382 ML20141K386 ML20141K390 ML20141K395 ML20141K398 ML20141K402 ML20141K406 ML20141K408 ML20141K415 ML20141K418 ML20141K423 ML20141K426 ML20141K432 ML20141K436 ML20141K441 ML20141K618 ML20141K620 ML20141K625 ML20141K626 ML20141K630 ML20141K633 ML20141K635 ML20141K637 ML20141K641 ML20141K643 ... further results
References
FOIA-91-282 NUDOCS 9203260053
Download: ML20141K887 (2)

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January 14, 1971 Wt,.i f ul W. R. Stratton, Chairman Oyster Creek Subcosaittes C. P. Stess, Vice Chairman, ACKS CATE00RY B REPORTS - OYET1ER CRREX JERSEY CKWRAL POWER & LICifT i

COMPANY LETTER MTED DECEMBER 23, 1970 AND DRL LETTER DATED JANUARY 3, 1971 Attached is a brief eumary of the information presented in the subject correspondenen. No ACRS action appears warranted.

The6e itees should be incorporeted in your set of project docussents to maintain an up-to-date description of the plant, organisation, pro-eedures, etc.

Dricinta Signed by J. C.1;cKinley I

j J. C. 14cKinley 8

Staff Assistant

}l Attachments:

1) Summary i

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2) Jersey Central Power 4. Light I

Co 1tr dtd 12/23/70

3) DRL ltr dtd 1/5/71 l

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OTSTER CLIEK Jersey Central power & 1.tsht Castpany letter dated i ~ i.

Deeeisber 13. 1970 reporte the 1 allure ef betk torius n'9 vacuum breskar block valves to operata en test.

$4 4 The Terus to reactor Wilding vuvum breaker, air.

operated, butterfly-type, block valves were being tested as part of the routine surveillance program for this aquipment. When a pressure of 0.4 peig was applied to the reactor Wilding stee of the dit f orential pressure evitch, neither valve opened i

as required.

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Yhe cause of failure appears to be insproperly adjusted operating link.asee and some ruet on a thrust plate. Af ter cleaning and sidjustment satisf actory operation was again obtained. The test frequency has been increased to reestablish coniidence in the performance of these valves.

i No ACRS action appears warranted.

DRt. l e t t e r da t e d J er.u ary 3. 1971 a ppr ove s Chang e No. 2 to the Technical Spectiteations which will allow the control rod withdravel prohibit functions to be per f orr.ed by either the Interwdiate Range or Source g stems during rasetor startup.

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Ho ACRS action appears warranted.

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