ML19340B892

LER 80-081/03L-0:on 801005,during Shutdown to Perform Maint on Reactor Bldg Vent Sample Pumps Due to Repeated Blown Fuses,Flow Alarm Was Annunciating on Control Room Panel C-903.Caused by Instrument Drift.Erroneous Alarm Reset

ML19340B892
Person / Time
Site:	Pilgrim
Issue date:	11/03/1980
From:	Mcloughlin M BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19340B889	List: ML19340B888 ML19340B892
References
LER-80-081-03L, LER-80-81-3L, NUDOCS 8011120526
Download: ML19340B892 (1)

Text

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- . LICENSEE EVENT REPORT CONTROL BLOCK: l l l l l l l@ (PLEAsE PRINT OR TYPE ALL REQUIRED INPCF.MATION) lo l t8l 9lM l A 7

l Pl Pl Sl 1l@l150 l 0 l - l 0 luCENSE UCENSEE Co0E i4 0 l 0NUM8ER l0 l0 l -l 0 l 0 l@l  ;$ 428 l 1uCENSE l 1 l 1TYPE l 1JOl@lS7 CATl SS lg CCN'T lolil

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69 EV ENT CATE 74 75 REPORT QATE 80 EVENT DESCRIPTION AND PROSABLE CONSEQUENCES h Iol2l l During a plant shutdown from October i to October 6, 1980 maintenance was performed on l ,

,o,3,  ; the Reactor Building Vent Sample Pu=ps because of repeat.ed blown fuses experienced on i io,,,i September 30 and October 1,1980. Upon returning the pumps to service a flow alarm l 1o isl I was annunciating on control room panel C-903. The R3V-PRM sa=ple pumps were j ga g ,; rebuilt, the sample line purged and the alarm system adjusted. All maintenance and g 1

lol7l l djust! Cnts were Completed and the system returned to service prior to startup. l ,

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,,,, SECUENTIAL OCCUR RENCE REPCRT REVISICN gggfgo EVENT YEA R REPCRT No. CODE TYPE No.

@ aeg 1810nl 1-1 10l 81 Il l/l 10 l 3 I ltl l-l 101 L2i n  :. a u a :9 20 u n Wx'M '?CIf8J eVA'Er 5*"EEeE" v c Neur: ^'u Tr"TE' Po"R%e. "Tu"/.0E /'

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CAUSE DESCRIPTION AND CCARECTIVE ACTIONS h li6o} l The blown fuses were the result of moisture accumulating in the samole lines. Purcing l

[i jil l the samole lines eliminated this problem. The erroneous samole flow alar, reoutred a I

,,43, j minor reset adjustment to correct. The existing alarm system is adequate to detect I

, ;3; l si=ilar problems; therefore no further corrective action is olanned. I l i i41 I l 7 aa s0 ST  % PCWER QTHER STATUS 31 RY OtScovERY CESCRIPTtcN N.A. Operational Event li l 5 l l El@ l 1 l 0 l 0i2l@ln

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A!nviTY Cc'ETENr RELEASEo e7 m EASE tocATioN cP REuASE @

li Ie 8I 9W @ LzJ@l 7 1.

AucuNTonACriviTv N.A.

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45

@ N.A. l l It 80 PER$CNNEL EXPCSURES NUWGER TYPE DESCRtPT1CN l i l 71 I ol ni n @l z i@l N.A. I

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l7 t l s8 l9l 0l 0 l 0 l@l12 11 l

80 TOSS oF on DAMAGE To PACIUTY TYPE CESCRIPT!cN 11191l,,,,,IJ@l N.A. I 7 8 9 to 30 l2lol N*A* l lll l lll 7 8 9 10 68 69 60 -

Mr. M. Thomas McLoughlin . dd7-7M-7RbX6) L