05000316/LER-1982-098-03, /03L-0:on 821127,fire Detection Sys Alarm for 4 Kv Switchgear Room Received Due to Pyralarm Detector Alarming. Caused by Low Alarm Setpoint.Pyralarm Replaced

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/03L-0:on 821127,fire Detection Sys Alarm for 4 Kv Switchgear Room Received Due to Pyralarm Detector Alarming. Caused by Low Alarm Setpoint.Pyralarm Replaced
ML20028C270
Person / Time
Site: Cook 
Issue date: 12/22/1982
From: Palmer R
INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20028C263 List:
References
LER-82-098-03L, LER-82-98-3L, NUDOCS 8301070284
Download: ML20028C270 (1)
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LER-1982-098, /03L-0:on 821127,fire Detection Sys Alarm for 4 Kv Switchgear Room Received Due to Pyralarm Detector Alarming. Caused by Low Alarm Setpoint.Pyralarm Replaced
Event date:
Report date:
3161982098R03 - NRC Website
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text

LICENSEE EVENT REPORT CONTROL BLOCK:

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60 61 DGCK ET NUMBE R 68 63 EVENT DATE 14 15 REPORT DATE na EVENT DESCRIPTION AND PROSABLE CONSEQUENCES h i DURING NORMAL OPERATION, A FIRE DETECTION SYSTEM ALARM FOR THF 4W WTTrH t o,2 i i o ia 11 RECEIVED DUE TO A PYRAI. ARM DETECTOR ALARMING FOR No APPARENT REAS FIRE WATCHES l

Lo L.4J l WERE ESTABLISHED IN THE AFFECTED ZONE OF THE ALARMING DETECTOR LoIsI LCORRECTED. THIS CONDITION REMOVED ANY FURTHER CAPABILITY FOR THE FIRE DETECTIO s

g t o 1611 SYSTEM TO ALARM IN THE CONTROL ROOM IF ANY ADDITIONAL PYRALARMS WITHIN TH l

i o I il l ALARMED. THIS DESIGN FEATURE WAS EXPLAINED IN DETAIL IN R0-05 4

1 WAS NON-CONSERVATIVE WITH RESPECT TO TECHNICAL SPECIFICATION 3.3.3.8.

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, d L OPERATION DEPARTMENT PERSONNEL IMMEDIATELY REPLACED THE ALARMING DETECTOR. THIS WAS j i: Ii11 PERFORMED TO MINIMIZE DETECTOR IN0PERABILITY TIME AS EXPLAINED IN R0-050/315-096.

i u L_j 1 THE NEW DETECTOR WAS VERIFIED 70 BE OPERATING CORRECTLY AND THE SYSTEM WAS RETURNED i

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