ML19225A013

LER 79-016/03L-0 on 790611:pressurizer Pressure Channel for One of Two power-operated Pressurizer Relief Valves Found to Be Reading 250 PSI Lower than Actual Pressure.Caused by Shift at Zero Point.Zero Point Readjusted

ML19225A013
Person / Time
Site:	Millstone
Issue date:	07/10/1979
From:	Stratman R NORTHEAST UTILITIES
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19225A011	List: ML19225A010 ML19225A013
References
LER-79-016-03L, LER-79-16-3L, NUDOCS 7907170115
Download: ML19225A013 (1)

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LVENT DF.CCillP Tio J AND fl<OD AI'LE Coi J LOU E ',CE S of tua pop r j STJ [ DurinrLa plant cooldown the pressurizer pressure channel for onn ,

operated pressurizer relief valves was found to be reading approximately 250 PSI l'he cooldo'.-m was continued in accordance _j g[ lov;er than actual pressurizer pressure.

The with the Action Statement of Section 3.4.9.3 of the Technical Specifications. _l gg

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pressure transmitter for the affected channal was adjusted, a calibration checi:

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121') L p rr red and the channel restored to service within 13 hours1.50463e-4 days <br />0.00361 hours <br />2.149471e-5 weeks <br />4.9465e-6 months <br />.

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