ML20126D190
| ML20126D190 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley, Salem, Sequoyah, North Anna, Diablo Canyon, Farley, Cook, Zion, Trojan  |
| Issue date: | 08/12/1977 |
| From: | Nolan F, Whitt K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| References | |
| FOIA-79-149 PNO-II-77-143, NUDOCS 8004220084 | |
| Download: ML20126D190 (1) | |
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JRELIMINARYNOTIFICATION
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August-12, 1977 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-77-143
,lh This prelimir.ary noti Neation constitutes EARLY notice of an event of
.y POSSIBLE safety or puolic interest s1gnificance.
The information y'#
,y preser.ted is as initially received without verification or evaldation f
and is casically all that is known by IE staff on this cate.
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FACILIT'/:
Westinghouse Electric Corporation
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Pitt:curgh, Pennsylvania N_
,_ / J 1U3J_ECT:
FAILURE OF SAFEGUARDS SYSTEMS PUMPS TFe Westinghouse Electric Corporation notified NRC on August 12, 1977 that a production lot of abuut forty (40) pumps supplied by Facific Pump Company appears to have been manufactured using snafts made of inferior
.'atarial. The pumps are used for primary system charging and high d 7.-
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rrenure safety irjection in the emergency core cooling systems for pra:surized water reactors.
One or more of the pumps have failed at "3
tha D. C. Cook, Trojen, and Beaver Valley plants.
Other facilith.
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tha'. presently have the suspected pumps installed in the charging and safeguards syst as are: Zion, Salem, Farley, Diablo Canyon, Sequoyan,
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and North Anna. Of these, Zion, Salem and Farley are in the operational ph::e.
Westinghause personnel are presently conducting an investigation to
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detennine the cause of the failures.
The early indications are that
~J-the pump shaf t matorial may not have been heat treated properly causing brittle fatigue failura.
The failures have been experienced af ter mre then 5,000 'tcurs of pump operation.
Some of the suspect pumps have operated suostsntially longer than 5,000 hoitrs witnout problems.
All utilities with suspect pumps have been notified by Westingh'ouse.
Mtdia interest has nnt been evident and is not anticioated.
?HC lieadquartern ws notified of this occur-@t by a Westinghouse repr sentative at approxirrately 2:00 p.m. on August 12, 1977.
Contact:
KWWhitt. IE x28019 FNo1an. IE x28019 Di s tri bu tion:
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t.hairman riendrie l
Comissioner Kennady S. J. Chilk, SECY C. C. Kamerer, CA Cc:miissiorer Gilinsky (For Distribution)
Transmitted: MNBB P Sidg _
E. Volgenau, IE L. V. Gossick, E00 E. G. Case, NRR Region S. H. Hcnauer. E00
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J. J. Fouchard, PA SS Bldg (MAIL)
W. G. Mcdonald, MIPC C. V. Sm E 7 1tiSS R. J. McTiernan, CIA R. G. Ryan, OSP R. Minogue, SD H. K. Shapar, ELD u,----.
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t PRELIMINARY NOTIFICATICN l
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