05000254/LER-1982-037-03, /03L-0:on 821213,during Automatic Blowdown Test, Automatic Blowdown Timer 287-105B Tripped at 131 in Excess of Tech Specs.Caused by Instrument Setpoint Drift. Timer Readjusted to Trip at 102

/03L-0:on 821213,during Automatic Blowdown Test, Automatic Blowdown Timer 287-105B Tripped at 131 in Excess of Tech Specs.Caused by Instrument Setpoint Drift. Timer Readjusted to Trip at 102

ML20028D105
Person / Time
Site:	Quad Cities
Issue date:	12/29/1982
From:	Leaverton W COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20028D096	List: 05000254/LER-1982-037, Forwards LER 82-037/03L-0 05000254/LER-1982-037-03, /03L-0:on 821213,during Automatic Blowdown Test, Automatic Blowdown Timer 287-105B Tripped at 131 in Excess of Tech Specs.Caused by Instrument Setpoint Drift. Timer Readjusted to Trip at 102
References
LER-82-037-03L-04, LER-82-37-3L-4, NUDOCS 8301170089
Download: ML20028D105 (1)

LER-1982-037, /03L-0:on 821213,during Automatic Blowdown Test, Automatic Blowdown Timer 287-105B Tripped at 131 in Excess of Tech Specs.Caused by Instrument Setpoint Drift. Timer Readjusted to Trip at 102

Event date:
Report date:
2541982037R03 - NRC Website

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NRC FORy 386 U.S. NUCLEAR REGULATORY COMMISSION (7 77}

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8 60 61 DOCKET NUM8ER 68 69 EVENT OATE 74 75 RE*CRT DATE 80 EVENT OESCRIPTION AND PRO 8 ABLE CONSEQUENCES h 10 l 2 l l While performing the Automatic Blowdown Loqic Test, orocedure OtiS 700-1 (Temocrary l

g; Procedure 1766), Automatic Blowdown Timer 207-1058 was found to trip at 131 seconds.l 10141 l This time was in excess of the Technical Specification Table 3.2.2 allowabic limit l

10161 l of 120 seconds or less.

Even though this time was in excess of the Technical l

lO is l l Spec i fi ca t i on limit, the timer was operational and would not have prevented the l

10 l 71 i ful fillment of the functional requirements of the Automatic Pressure Relief System. l In addition, the redundant 287-105A ADS timer tripped in less than 120 seconds, and 1018l l thus, would have provided the ADS functional requi rement s wi thin the reaui red t ime l

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NAME OF PREPARER PHONE: