ML20141L843

Forwards Util Reporting Discovery of Cracks in Seat Bushings of Two Main Steam Safety Valves at Plant

ML20141L843
Person / Time
Site:	Oyster Creek
Issue date:	05/04/1972
From:	Skovholt D US ATOMIC ENERGY COMMISSION (AEC)
To:	Siess C 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 9203270023
Download: ML20141L843 (2)

Text

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\ ATOMIC ENERGY COMMISSION

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, IT. CMeter P. Elect Cna!:m, Advie:ry Ccerdttee en F.eacter Enferaarde

, U. S. Atc.r.!e Energ/ Ccerrlecicn hr hir.ct c n , D. C. 205 %

Lear I'". Sie e r :

Sixteen (1H c pies cf the follouirq nre trar=dtted fcr the 1

Cemittee'r- information:

Letter f rom Jersey Central Power 6 Light Company dated May 1,1972, reporting the discovery of cracks in the seat bushings of two main steam safety valves at the Oyster Creek Station.

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Sincerely, C5 g ' q ~ pr - , $b' 'M hp f ',/fkn Y h '

((h dy L* , Q. * '[}j Donald J. Skovholt Assistant Director for Feactor Cperations Division of Reactor Licensing

Enclosures:

As stated kl o]! <;(..:

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l SUFFLDENT NO.153 CATEGOET I

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t r ereex e; WRS Core Spray Sntse Uster itenemer Study Jersey Central Power 6_ Liaht Company letter dated _Ayril 24. 1972

-forwards additional information ter the Core Spray System Water Itausmer Study (See Supplement so.150, pages So and 53). The licensee has rechecked his measurements of etring stearances confirme that pipe dispincoments of up to i 2-1/2" are valid for use in the stress analysis. The licensee doctinee the AEC suggestion to perform additional water kommer tests and prefers l

to rely on mondestructive tests. The licensee sistmo that there 4

was only one stress cycle associated with each water hammer but has analysed for multiple cycles.

No ACES action is recoermonded.

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The enclosed material may be discarded af ter your review.

OCH)-

WES $sfety Valve Bests b

ACRS Jerset Central Power 6 tiaht Cogpfnv letter detod May 1.1972 reporte the discovery of cracke in the seat bushin8e of two out of five safety valver inspected. The cracks appear to be transgranuter and entend

' to a depth of about 150 mile, one cracked ~eushing has been eent to i CE Vallecitos for further metallographic examination. The investi-

, sation is continuing, a

l The Division of Compliance reported em this to the Commsittee at the

' 145the meeting (May 1972),

i No ACRS ction te recommended.

The enclosed material should be retained pending completion of the inve s tigation.

OCH)-_

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