05000267/LER-1981-007-03, /03T-0:on 810108,during Pcrv Cooling Water Sys Data Evaluation,Violation of Limiting Conditions of Operation Found Re Loop 2 Inlet & Outlet Average Temp Below Tech Spec Limit.Caused by Insufficient Heat Input

/03T-0:on 810108,during Pcrv Cooling Water Sys Data Evaluation,Violation of Limiting Conditions of Operation Found Re Loop 2 Inlet & Outlet Average Temp Below Tech Spec Limit.Caused by Insufficient Heat Input

ML20003B086
Person / Time
Site:	Fort Saint Vrain
Issue date:	02/03/1981
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20003B079	List: 05000267/LER-1981-007, Forwards LER 81-007/03T-0 05000267/LER-1981-007-03, /03T-0:on 810108,during Pcrv Cooling Water Sys Data Evaluation,Violation of Limiting Conditions of Operation Found Re Loop 2 Inlet & Outlet Average Temp Below Tech Spec Limit.Caused by Insufficient Heat Input
References
LER-81-007-03T, LER-81-7-3T, NUDOCS 8102100334
Download: ML20003B086 (1)

LER-1981-007, /03T-0:on 810108,during Pcrv Cooling Water Sys Data Evaluation,Violation of Limiting Conditions of Operation Found Re Loop 2 Inlet & Outlet Average Temp Below Tech Spec Limit.Caused by Insufficient Heat Input

Event date:
Report date:
2671981007R03 - NRC Website

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, 3,;; l While evaluating FCRV cooling water system data in preparation of a reportable occur- ]

rence, it was determined that a violation of an LCO had occurred rather than operation; gg,3, l o ! A l l in a decraded mode as was originally b elieved. *

he Loop 2 inlet and outlet aver sze l

l 3 i s J l temperature was below 100 decrees F.

f rom 0430 hours0.00498 days <br />0.119 hours <br />7.109788e-4 weeks <br />1.63615e-4 months <br /> January 8.1981. until 1000 hours0.0116 days <br />0.278 hours <br />0.00165 weeks <br />3.805e-4 months <br /> t

[;jejtJanuary 10. 1981. contrari to LCO 4.2.15(e) and-is reportable per Fort St. Vrain Tech-l l3iil lnical Specificat. ion AC 7.5.2 N 2.

Previous operation below 100 degrees F. was re-l l ported in Reportable Oce'urrences 79-07 and 77-28.

There are no consecuences of this 1

,3i4, a s event and no ef 6ct on public health or'saf ety.

A redundant system iras inoperable for a

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64 47 CAUSE CESCRIPTICN AND CCRRECTIVE ACT10N3 h ji j a } l The cause of the event was f ailure to maintain sufficient heat input to the cooling l

g i system from the surge tank heating coils. The low heat input allowed the cooline l

vater system temperature to decrease below the LCO limit while the reactor was shut-l

,,,,, ldown. All Licensed Operators will be re-instructed in PCRV cooling water system oper-j

,,,,, gation. Evaluation of effects on top head liner material requested.

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