ML20003C385

AO 50-219/74/27:on 740417,insp Revealed Bergen-Paterson Hydraulic Shock & Sway Arrestors in Drywell Inoperable.Cause Undetermined.Units Will Be Replaced During Present Refueling Outage

ML20003C385
Person / Time
Site:	Oyster Creek
Issue date:	04/18/1974
From:	Reeves D JERSEY CENTRAL POWER & LIGHT CO.
To:
References
AO-50-219-74-27, NUDOCS 8103030200
Download: ML20003C385 (2)

Text

l Tice of 1500 2cn -

. D!s covery:

4/13', _ _

OYSTER CREEK NL'Ct.EMI GENEP Tb'G STATION t FORKED RIVER, SEW JEESEY 08731

- Abnormal Occurrence Report No. 50-219/74/ 3 al 8

N/A a Violation of the Tcchnical Specifications, paragraph jcN EEt Failuro of thrco hydraulic shock and sway arrestors (two conse-i located on the main stcan line and one on the feedwater :c. line).

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cration, This event is censidered to be an abnormal 1.150 occurrence as de-fined in the Technical Specifications, paragraph Jeen PRIOR Routino Shutdown Nctural 3CE

~ Steady State Power '

= Operation Hot Stendby load Changes During

~ Cold Shutdown Routino Power Operation X _ Refueling Shutdown Other (Specify)

_ Routine Startup ~

the Operation ihe plcnt was shutdo.m with reactor coolant <212*F..and propylene in the process of preparing for refueling operations. . -

2. . w ,

an inspection was conducted of all Bergen ON On A,pzil 17, 1974, JNCE:

Paterson hydraulic shock and sway arrestor units installed in the drywell. . As a result of this inspection, three units, re-

• built in Septenber 1973 with molded polyurethane material, ,,, , ,

f were found inoperable as detornined by the absence of fluid -

level indication in the accu:ulators. The inoperable units -

~~"'""~" P00R ORIGINAL. ....

b/ o303 O? DO

N 83%cs . tweWan

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487530 South !!ain Stcan 23' 487512 South 1!ain Sto:= 51' 4S7519 South Feedwnter 51' APPARP.!.T CAU3E Design _ Proceduro 0F OCCURr2SCE: ~

lbnufacture Unusual Service Cendition Installation / Inc. Environ ental l Construction Corponent Failure

_ Operr. tor _ Other (Specify)

None of the units have as yet been disasser. bled and, conse-quently, the failure nechanism is unknown at this ti e.

ANALYSIS OF Had the design scistic ovent occurred during power operation, OCCURPE CB: -

the restraining capt.bil:. ties of these units esy have been

' ~

seriously icpaired and, consequentily, degraded the 'st;ructural integrity of the steam and feedwater lines in question.

C0aracrIVE Current plens are to replaco 'those units and others in the AWICN: -

pricary containcent which still contain colded polymrethane v

natorial with units rebuilt exclusively with othyleno propylene naterial. '

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,u 3 FAILURE DATA: Hanufacturer: Bergen-Paterson Type: IISSA-10 .

Serial Nos. : 487530 -

487512 _'

487519 4 f ,, ,( _ .

7

, l P00R ORIGINAL ....