ML20084C478

Preliminary AO 50-219/74-53:on 741014,stack Gas Sample Sys Discovered Not Functioning Properly While Reactor Not in Isolated Condition.Caused by Excessive Air Flow to Pump Reducing Vacuum at Filter.Loose Fitting Replaced

ML20084C478
Person / Time
Site:	Oyster Creek
Issue date:	10/15/1974
From:	Carroll J JERSEY CENTRAL POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20084C439	List: ML20084C435 ML20084C478
References
AO-50-219-74-53, NUDOCS 8304080067
Download: ML20084C478 (4)

Text

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' 1 To  : James P.'O'Reilly . ,

'i.nirectorate of Regulatory Operations .,

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1631 Park Avenuo .

,uKing'of Prussia, Pennsylvania 19406

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d Frtmas ~ Jersey' Central Power & Light % my  ?

i Oyster: Creek th1 clear Generating' Station  ;

Docket #50-219 , .

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. Fotked River, New Jersey 08731 t

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' subject: Abnormal Occurrence Report No. 50-219/74/53 .

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' 2e:following is a prelimiery report being submitted

-in.coupliance with the Technical Specifications, . (

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>paragraldi 6.6.2 '.,'

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'.-Preliminary Approval ,

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. T. Carroll,:Jr. .Date des Mr. A. Giambusso t

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bport Dates 10/1S/74

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Occurrenc3:

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. GYSTER CREEK NUCLEAR GENERATING STATION

' FORKED RIVER, NEW JERSEY 08731 Abno+=41 Occurrence Report No. 50-219/74/_53_ ,

ltENTIFICATICH Violation of tha Technical Spedifications, paragraph 3.6.A.3.

2 OCCURRENCE:

.When it was discovered that the stack gas samplo system was not functioning properly while the reactor was not 'in an isolated s

condition.

i Dis event is considered to be an abnormal occurrence as de .

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' . fined in the Technical Specificaticas,- paragraph 1.15 R and D. q n

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.t-CNDITIONS PRIOR '

@ OCCURRE1K'E: _ Steady State Power Routine' Shutdown Hot Skandby ,,,j Operation Cold' Shutdown Load Changen During Refueling Shutdown Routine Power Operation i:

'X Poutine Startup Other (Specify)- I Operation .  !

A Mmal reactor startup was in progress with the reactor mode  ;

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~:~ "."iewitch.~1n.'the7STARTUP" position. Reactor water teceerature was .

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< 212 F. .

ESCRIPTION I D OCCURRENCE: On 10/14/74 at 1230 the stack gas sample pump was replaced, with i

i the reactor in an isolated condition, as a preventivo maintenance con-sideration. At 1730 on 10/14/74 the atack gas cample ayaten was re-turned to service and appeared to operatf pro::ppn.c/p . . .u -<perlyi.; At, .0033. on 10/15/74 the main steam isolation valves were opened in the course

. 1 of a reactor startup.

At,0100 . on 10/15/74 an equipment operator noted that the atack

' '.'." ,1 m,J"', c./gan';,naspislfMdp apM) tow 8MdtEg'.~EE'a hl6her i tlian , normal temper-

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s filter was replaccd in an

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.' propsrly. ctack gas loE flow alcrm wanOt =eed in the contre 1  :

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.y is normal to receive the low flow al&tm '!act uated by vacuum at the filter) during filter replacement. I'-l

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, c:At,0629- on 10/15/74 further investigation of the -stack gas aan-pie system was conducted. Sagle air flow indication was normal, however, there was no indication of vacuum at the filter and the pump oil. level was low. %e pump was refilled with oil and an indication of vacuan at the filter was olisarved although air flow could not be regulated and pump 611 level decreased rapidly. On the basis of these .,

observations the stack gas s'asple system was considered to be .f.inopera-

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tive and at 0630 the reactor' was isolated,).

Design [ 'f Prodedure .

l fPARENTCAtNE Manufacture .O Ifnusual Service Condition J OCCURR2NCB Installation ,,,, ,,Inc. Environmental I Construction Component Failure Operator 4.. X Other (specify) - '

- Rwaina. tion of the pump revealed a loono fitting between the oil ,,

flow regulating valvo and the oil reservior which feeds to the pump

s suction. We loose fitting permitted excessive air flow to the ptap suction through the oiling system and so reduced or eliminated .the y, ;1%./.vahitin.lf11M ..Y.'.'"'/"E;'[ ' P8 's ^b-lf. U. 7 ' 7'"7.'? ?"'l t.: (it.p g,T e " g g p 7 ': y;p. L, . ,.

i L10d,YSIS CP KCtJRTENCE: As it is not possibic to determine the exact time at which the stack gas sample systen became inoperative, it must be assumed that

"'the plant was operated in violation of Technical specification para-

, graph 3.6.A.3 during the time that the reactor was not isolated (from

. g.g., i.0033 on'10/15/74 to 0630' on 10/15/74). 'this period of S Hr. and 57 min, is however less than the 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> unmonitored period described

.6-3 a h2 e Technical ifications.

Abncrami Occurrenco. . ,

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Rapc;t No.. 50-219/74/53

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CORRY.CIIVB a.'~S ACTIm : %e stack gas sample ptusp was nwamined and,,tha ' loose fitting. Ts

. '.s tightened. he -system was then returned to service aria observed . ,

to operata normally. . ,

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