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AO 50-219/74/40:on 740715,one Bergen-Paterson Hydraulic Shock & Sway Arrestor on South Core Spray Sys in Drywell Noted Inoperable.Caused by Loss of Hydraulic Fluid.Unit Replaced
	ML20084C921
Person / Time
Site:	Oyster Creek
Issue date:	07/16/1974
From:	Carroll J, Parsall R; JERSEY CENTRAL POWER & LIGHT CO.
To:	James O'Reilly; NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
	AO-50-219-74-40, NUDOCS 8304080350
	Download: ML20084C921 (3)
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Subjnt. Ahnornial Occurrence Report No. 50-219/74/40 The folic;.ing is a prelirinary report being subnitted in compliance wiih the TorbnicM c, m ri ri c:

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                                                                                                      'y DRADOCK05000$                                  COPY SFN1' REGION                                      __

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Initial Telephone Date o ' Ituport Dat e : 7/16/74 Occurrence: 3 4 q 7/15/74 Initial 1lritt en Tir:e of j Report Dat e : 7/16/74 Occurrence: 1400 OYST!ilt CREEL: NUCLEAR CliNIIRATING STATION FORKED RIVli!t, NE!! JEllSEY 08731 Nmomal Occurrence Report No. 50-219/74/ 40 r IlEN f1FI CAT 10:; Inoperability of one Bergen-Paterson !!ydraulic Shock and Swdy ', OF OCCU!!!1:CE Arrest or locat ed on the scutt' core spray systen in the drvwell; - ' This event in considered to be an abnornal occurrence as de- ; fined in the Tech: 'c,1 9 'c!4 ! c ra ! cr.s , p ra3raph 1. ; ", r n d ' t OJ'.!H T10XS Hu O'. TO OCCIE:RIN Ct Steady State i;o.eer Routine Shutde..in llot Standby

Operation I Cold Shutde n 1.oad Changes During _ _ tciuclin .,auido.u emo r , ,m "e .7er ope r:.ti er, lloutine Startup x Othc r (Speci fy) Operation The reactor vas shutdcen .i t h react m c ' to ta p rature ~ 1

                               ] css than 21:0 F.                                                                                         >

DESCRI PTION An inspection of the dryuel] shock and sway arrestors, ! 0F OCCURRENCE.

                              ' erf c: Pat erson Type IF."A~ 13, J ocnted rn                      inoperabic unit       en                !

e the south core spray system. The inoperable unit was installed ! in the drywell during t he Snring hefueling Out ar,e a ft er i t hr..i ' 1, rel , 1

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1; Ai7id * 'V: !9 ~ < 0:- (L L'l; Pre e6re l , 4: 1.' n. ! b c i o : Unusual Servir< Cm htion Insta li:'t i m ' Inc. Environi:> nt al Conr t ru ct i r n X Compo1ent Fai l ure ' _ _ 0;irrnto. Other (S p e c i .y ) ' I I l 1 -

                                               .        3 Abnormal Occurrence                                                       -

Rep art I,'o. 50-219/74/40 Par,e 2 l

1 The cause of the snubber inoperability was due to loss of l l

hydraulic fluid. Examination of the unit revealed two small cuts on the rain cylinder shaft U-cup caused by burrs on the piston. K1ALYSIS OF The s a fe t '. ,i gnifi cance of this occurrence was a partial loss . OCCURRENCE: of seisnic restrainine ability for the affected systen. 11ad l the plant suf fered .. der.ign bases carthquake, the probabili ty

1h;t the enn h core spra wsten unuid have suffered structe,'

w , u, ao: , l CORRECTIVE The failed unit was replaced with an identical snubber which f ACr101: }

                                                                            .-s Ichuilf 1:ith et Im1 on..         pynpy1ogn r,-tr~j7,1 333 779,, 3 3 7c test ed to 4,000 psi .                                                                                              ,

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                                                                           'l ype - IISS 't- 1 C                                                                                                 i Serial Ke:.ber - 487F i

i s i ! 4 i s i i i i I l l n .iq r, 9 y 'ccparcd hv .\.J .1 N' . h (.'L8 6. q1 )k Dat n ; 7/l f,/ 74 ' _ _ _ _ _ _ _ _ . . _ _ _ _ . _ _ _ _ _ _ _ _ - . _ _ _ _ _ __ . _ _ _ _ _ __}}

ML20084C921

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