05000293/LER-1981-027-03, /03L-0:on 810616,while Performing Rod Block Monitor Surveillance Test 8.M.2.3.1,step 31 High Rod Block Came on at 123% Vs 94% Power.Caused by Failed Trip Ref Card. Card Replaced in Kind

/03L-0:on 810616,while Performing Rod Block Monitor Surveillance Test 8.M.2.3.1,step 31 High Rod Block Came on at 123% Vs 94% Power.Caused by Failed Trip Ref Card. Card Replaced in Kind

ML20009E996
Person / Time
Site:	Pilgrim
Issue date:	07/16/1981
From:	Mcloughlin M BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20009E986	List: 05000293/LER-1981-027, Forwards LER 81-027/03L-0 05000293/LER-1981-027-03, /03L-0:on 810616,while Performing Rod Block Monitor Surveillance Test 8.M.2.3.1,step 31 High Rod Block Came on at 123% Vs 94% Power.Caused by Failed Trip Ref Card. Card Replaced in Kind
References
LER-81-027-03L, LER-81-27-3L, NUDOCS 8107280594
Download: ML20009E996 (1)

LER-1981-027, /03L-0:on 810616,while Performing Rod Block Monitor Surveillance Test 8.M.2.3.1,step 31 High Rod Block Came on at 123% Vs 94% Power.Caused by Failed Trip Ref Card. Card Replaced in Kind

Event date:
Report date:
2931981027R03 - NRC Website

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9 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES O'o lo l2l lOn June 16, 1981, at 1500 hours0.0174 days <br />0.417 hours <br />0.00248 weeks <br />5.7075e-4 months <br />, while performing rod block monitor surveillance l

test No. 8.M.2.3.1, step 31 "High Rod Block" came on at 123% power vice 94% power.

l Io i3I I l o !.1 l The redundant trip channel was verified opere'.21e

=ad repairs ef fected to the in-l l o I s l i operable trip channel. The inoperable trip channel was calibrated and returned to l

lo (6 l l service at 0145 hours0.00168 days <br />0.0403 hours <br />2.397487e-4 weeks <br />5.51725e-5 months <br /> on June 17, 1981.

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44 47 CAUSE DESCRIPTION ANO CORRECTIVE ACTIONS h l. 6 o l lCause - Failed trip reference card in one channel of trip circuit.

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