ML20028B466

LER 82-021/03L-0:on 821023,relay 917-16A-K44B Failed to Open Contacts When de-energized.Cause Not Determined.Relay Replaced & Correct Operation Verified.Monitoring Program Implemented to Determine Need for Generic Replacement

ML20028B466
Person / Time
Site:	Cooper
Issue date:	11/19/1982
From:	Bednar L NEBRASKA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20028B460	List: ML20028B459 ML20028B466
References
LER-82-021-03L, LER-82-21-3L, NUDOCS 8211300406
Download: ML20028B466 (1)

Text

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60 61 DOCKET NuveE R Ni 69 EVENT DATE 74 7b REPORT DATE 80 EVENT DESCHIPTION AND PROBAOLE CONSEQUENCES h I O I 2 I l Durine routine testing of the Maia Steam Line Process Radiation Monitoring instrumen-1 o 3 ltation, a relay designated 917-16A-K44B failed to open its contacts when deenergized.l o 4 1This relay is associated with the MSIV Isolation Lonic which remained operable. The i 10151 l automatic closure of a reactor water isolation valve on high radiation level was inood O 6 lornblo; hur eho rodundnne un1vo u,v nnornblo. The "R" ('e n v i n T fan 1neinn t.rn c: immod i n t- l 10 l 7 l l ol y n1n, aa in the trio condition as 'oer Tech. Spec. 3.7.D.2. This occurrence presented i O la l I no adverse consecuences to public health and safety. I 7 8 9 80 SYSTEM CAUSE CAUSE COVP. VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE O 9 l s l D l h [yd h [A_j h l R l E l L l A l Y l X lh l Alh W h 10 7 8 9 81 82 13 18 59 20

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J3 34 3b 36 37 40 43 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS i O IRelav 917-16A-K44B is a GE HFA relay. It was inspected as per GE Service Information l i l Letter No. 44 in September 1981 and did not need replacement. Cause of the relay faily il l7l l ure could not be determined. Relay was replaced and correct operation verified. A mont I i I 3 I [_i_toring program has been implemented to determine need for generic replacement. A l lil4l l preventive maintenance replacement program has been initiated for the relay coils. I i 7 8 g 80 S A S ". POWER oTHER STATUS IS OV RY DISCOVERY DESCRIPTION i 5 (_gjh l 1 l 0 l 0 l@l NA l [B_j@l Surveillance Testing l ACTIVITY CO TENT RELE ASED OARELE ASE AMOUNT OF ACTIVITY LOCATION US RELE ASE 7

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