ML20003B086

LER 81-007/03T-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

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: ML20003B078 ML20003B086
References
LER-81-007-03T, LER-81-7-3T, NUDOCS 8102100334
Download: ML20003B086 (1)

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'C/ 'Nic FOIM 366 U. S. NUCLE A? REGULAT03Y Covul5SION Ii.711 LICENSEE EVENT REPORT CONTROL BLOCK. l l l l l l l (PLE ASE PRINT OR TYPE ALL RECulRED INFORMATIONI 1 e lo !il.I,C l 0uCENsEE  ! r t scc:4 i v l 1l@l. 0101 - 10101010101 - 1010 a!@l 4 l ocENsE t 111210 T,,E ol@l.,s7u l Jg 1 i. venst wo.e 2.

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H EVENT D ATg 74 a agegRT C ATE WO EVENT CESCRIPTION AND PRCB ABLE CONSECUENCES h

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

gg,3,  ; rence, it was determined that a violation of an LCO had occurred rather than operation; 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

,3i4, l ported in Reportable Oce'urrences 79-07 and 77-28. There are no consecuences of this 1 a s event and no ef 6ct on public health or'saf ety.

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7 A redundant system iras inoperable for a Y$CE *[CTE de^'55E cCveesENT cCcf sLB((ct sCoMb period of about lois]

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9 10 11 12 13 14 13 20 SE OVE NTI A L 00Cy e n E NOE RE*CRT REvisiCN lea ao DVENT vt AR A E*CRT No. COCE TvPE No.

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1. J J4 J3 .6 (J 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. l 7 8 ) 90 sT  % POWER oTWER $7A TUS 5C v oISCOVERv 0ESCRiPT!oN lii5i W@ l 0 l 0 l 0 l@l nN/A l l Al@l Discovered During Data Review l

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