05000293/LER-1980-086-04, /04L-0:on 801024,condenser Delta T Exceeded Tech Spec Limit.Caused by Increasing Sea Water Temp & Lowering Tide Level

/04L-0:on 801024,condenser Delta T Exceeded Tech Spec Limit.Caused by Increasing Sea Water Temp & Lowering Tide Level

ML19345B449
Person / Time
Site:	Pilgrim
Issue date:	11/24/1980
From:	Mcloughlin M BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19345B447	List: 05000293/LER-1980-086, Forwards LER 80-086/04L-0 05000293/LER-1980-086-04, /04L-0:on 801024,condenser Delta T Exceeded Tech Spec Limit.Caused by Increasing Sea Water Temp & Lowering Tide Level
References
LER-80-086-04L, LER-80-86-4L, NUDOCS 8012010347
Download: ML19345B449 (1)

LER-1980-086, /04L-0:on 801024,condenser Delta T Exceeded Tech Spec Limit.Caused by Increasing Sea Water Temp & Lowering Tide Level

Event date:
Report date:
2931980086R04 - NRC Website

text

U.S. NUCLEAR REGULATORY COMMISSION

NRC FCCM 334

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8' 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE so EVENT DESCRIPT.ON AND PROB ABLE CONSEQUENCES h l On October 24, 1980 at approximately 1700 hrs. the condenser delta T exceeded the Tecil-O 2 g l nical Specification 320F limit. The condencer delta T, the temperature difference l

g l between the inlet and discharge canal water temperature as recorded on computer point l I O l s i l C050 reached 32.030F. The displayed computer temperature is an average calculated l

g l over a duration of one hour.

Reactor power was immediately reduced approximately 7 l

[TTTl I percent for 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> to maintain condenser delta T below 320F.

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3J 34 35 36 31 40 41 42 43 44 47 CAUSE DESCNIPTION AND CORRECTIVE ACTIONS h l i l O l l An increasing sea water temperature and lowerint tide level resulted in this minor I

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No adverse environmental effects were expected or exnerienced as a I

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_M. Thomas McLoughlin