ML20141L006

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Forwards from Util Advising of Failure of Isolation Condenser DC Motor Operated Condensate Return Valve V-14-35 at Plant
ML20141L006
Person / Time
Site: Oyster Creek
Issue date: 12/20/1971
From: Morris P
US ATOMIC ENERGY COMMISSION (AEC)
To: Bush S
Advisory Committee on Reactor Safeguards
Shared Package
ML20091A092 List: ... further results
References
FOIA-91-282 NUDOCS 9203260275
Download: ML20141L006 (3)
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Text

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UNITED STATES

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. ATOMIC ENERGY COMMISSION

. d W ASHINGTON, D C. 20lel

'f; December 20, 1971

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Do ' tee No. 50-219 Dr. Spencer H. Bush Chairman, Advisory Committee on Reactor Safeguards U. S. Atomic Energy Commission

'! Washington, D. C. 20545 1

Dear Dr. Bush:

Three (3) copics of the following are transmitted for information the Committee:

Letter froc Jersey Central Power & Light Company dated December 14, 1971, advising of failure of Isolation Condenser DC motor operated condensate return valve, V-14-33 at Oyster Creek. >

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Letter from Jersey Central Power 6 Light Company [,94 $ ,7. A dated December 14, 1971, providing an interim report regarding the failure of Main Steam Isolation f nej '

Valve NS03B to fully close during a surveillance test [-

g to measure valve closure time at Oyster Creek.

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b N 0- Sincerely,

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kIM Peter A. Worris, Director Division of Reactor Licensing

Enclosures:

As stated.

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Oyster cre 6 Jesuary 21, 1972 WP.S Radweste storane Jersey Central Power and tiaht Company TVI dated December 4.1971 requests a temporary change in the Technical Specifications to allow the storage of 1.5 curies of liquid redveste in the storage tanks instead of 0.7 curies This change to f or the period Decostber 5,1971 to Deceenber 12, 1971.

A perr.anent change to the specifications is plammed.

I No ACRS action is recommended.

! N enclosed material may be discarded af ter your review.

(Jcm VKr. hain Steen foolation Valve Leakane I.

I ACRS Lersey Central Power end 1.inht Company. letter dated December 13. 1971 -

reports an oil test in the hydraulic dashpot of one isolation valve and t.he excessive leakage past the seat of the same valve. Rapairs were l swde and leak tightness restored. N valve will be retested at the next planned cold shutdown but no later than the next refueling (April 1972).

No ACRS action is recomunended.

The eactosed matertal should be retained as part of the pernament record.

I (JC VRS Misoperation of. Diesel treskit Jersey Central Power and 1.taht company letter dated December 13. 1971 reports an incident of an operator closing the generator breaker evitch onto a diesel generator that was at a standstill. The unit .as tested and found to be undamaged.

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Ho ACRS action is reccamended. .

N enclosed material may be discarded after your review.

(Jcu omet > .. .. ACRS.. . . . . . . .. . . . .- ~ . .

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un> 1/21/72 Form AIC-lit gRev. 9.H) AICM 0240 c,[ix[$$AAN~NNona orrx: i noi. o . .orses

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$UFr'D ENT Wo. 149 CATsCotY B , ,, . ,

Oyster Creek (Cont 'd) Janumry 21, 1971 f.$ 4 g.,p p:&

WR8 Gare Spray Water 8 r Study gf p-Jersey Central Pwer and Llaht Commeany letter dated December 15. 1971 forwards the final report, on the Core Spray Syst.aus Water Emmmer Study (See suppleasent to.143) . N licensee conc 1 mees that the Cece Spray Systees is euttable for sentinued operation and the jockey pump modt-fication has eliminated the water hanumer problem.

A study was perf rmed to evaluate the effects of water h r en the

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piping componente and included stress and fatigue smalysis and cesspartoon I with low cycle fatigue tests. N piping was sondestructively tested.

! N piping was found to be satisfactory. Operation via.h the jockey j pump indicates that the water hasamer problem has boca ellainated.

No ACKS action is recoemeended.

I l N enclosed material ser.y be discarded af ter your review.

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VRS Main steen Isolation Yalve Fatture ACRS Jersey Central Powet_ and Limht Company letter dated December 14. 1971 reports the f ailure of a section of the hydraulic dashpot that prevented one main steam isolation valve from closing fully. A cast iron cushion spud failed and medged in the me:hanism. N other valves were inspected I and another failed spud was found. Replacements wre manuf actured and the l valve operators were repaired and the valves returned to service. The j cause of the failures is still inneer investigation but is specultsed to be a shock leadind during a startup procedure..

No ACRS action is recommsended.

I N enclosed meterial should be roteined isntti the investigation is I coerple ted.

fxy) i WR5 Motor Operated Valve Failure Jersey Coctral Power and Limht _Commeny letter dated Decembe-- 14. 1971 reports the f atture of a motor operated valve from the Isolation Condenser.

N DC motor burned out apparently due to oil leakage. N motor was repaired and returned to service. ndditional action is being taham to amours that oti does not accumulate in motors.  ;

- - llo ACRS acjj on i s r econnendgd . N enclosed material may be discardet att.er your revtew.

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