05000293/LER-1980-075-03, /03L-0:on 790222 & 0807,fire Detection Alarms & Master Solenoid Relay Found Inoperable.Caused by Defective Wiring & Moisture.Wiring Changed & Detector Dried

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/03L-0:on 790222 & 0807,fire Detection Alarms & Master Solenoid Relay Found Inoperable.Caused by Defective Wiring & Moisture.Wiring Changed & Detector Dried
ML20002A778
Person / Time
Site: Pilgrim
Issue date: 11/14/1980
From: Mcloughlin M
BOSTON EDISON CO.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20002A777 List:
References
LER-80-075-03L, LER-80-75-3L, NUDOCS 8011210521
Download: ML20002A778 (1)
v • d • e


LER-1980-075, /03L-0:on 790222 & 0807,fire Detection Alarms & Master Solenoid Relay Found Inoperable.Caused by Defective Wiring & Moisture.Wiring Changed & Detector Dried
Event date:
Report date:
2931980075R03 - NRC Website
v • d • e

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LICENSEE EVENT REPORT CONTRO 8 LOCK: l-l l

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8 60 61 DOCKET NUMSER 68 69 EVENT QATE 74 75 REPORT QATE 80 EVENT DESCRIPTION AND PROB A8LE CONSEQUENCES h Fire detection alarms for the Retention Building and HPCI Turbine Room were found in- [

t o 121 l f773-] l operable on February 22 and August 7,1979 the Cardox system's Master solenoid relay l For each of these events a fire watch was immediately initiated l l o i41 l was found inoperable.

Io isJ l and corrective action taken. The fire watch precluded the development of conditions l

1o is l l adverse to safety therefore these events did not represent a danger to the health l

lol7ll and welfare of the public.

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44 47 CAUSE DESCRIPTION ANo CORRECTIVE ACTIONS li ;ol l The retention building fire alarm detector required a wiring change to prevent re-l PDCR 79-04 was implemented on March 8.1979 to preclude recurrence of this I 1i ii I l ~ currence.

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problem. The HPCI turbine room detector failed due to moisture.

It was dried and g

,;3l l returned to service within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. A fire watch with instructions to manually l

initiate the cardox system was maintained until its failed relay was replaced and the l ii,4i j system tested and returned to ervd9Edoor 7

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P *ciuTY STATUS

% POWER oTHER STATUS ciSCOVERY otScoVERY DESCRIPTION N.A.

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l Bl@l Routine Surveillance l

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68 69 80 3 7

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.Mr. M. Thomas McLoughlin 617-746-7900 o

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