05000249/LER-1979-023-03, /03L-0:on 790823,source Range Monitor Calibr Supplied Rod Block Trip at 1.03E5,exceeding Tech Specs Limit.Caused by Drift & Temp Dependency in Source Range Monitor.Defective Component Not Yet Identified

/03L-0:on 790823,source Range Monitor Calibr Supplied Rod Block Trip at 1.03E5,exceeding Tech Specs Limit.Caused by Drift & Temp Dependency in Source Range Monitor.Defective Component Not Yet Identified

ML17338B328
Person / Time
Site:	Dresden
Issue date:	09/17/1979
From:	Korchynsky M COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17174A032	List: 05000249/LER-1979-023-03, /03L-0:on 790823,source Range Monitor Calibr Supplied Rod Block Trip at 1.03E5,exceeding Tech Specs Limit.Caused by Drift & Temp Dependency in Source Range Monitor.Defective Component Not Yet Identified
References
LER-79-023-03L-01, LER-79-23-3L-1, NUDOCS 7909280429
Download: ML17338B328 (2)

LER-1979-023, /03L-0:on 790823,source Range Monitor Calibr Supplied Rod Block Trip at 1.03E5,exceeding Tech Specs Limit.Caused by Drift & Temp Dependency in Source Range Monitor.Defective Component Not Yet Identified

Event date:
Report date:
2491979023R03 - NRC Website

text

U. S. NUCLEAR REGULATORY COMMISSION

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8 60 61 DOCKET NUMBER GG 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES Q10 Phile performing weekly surveillance DES 700-3 (Source Range Monitor Calibration) f ~3 on two separate occasions, SRM /I21 supp 1ied required Rod Block Trip at 1. 03E5 remaining SHN channels were operable and would have rovided re uired Rod Block.

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