ML20004D578

LER 81-036/01T-0:on 810512,liquid Waste Discharge Exceeded Specified Limit for Tritium Concentration.Caused by Design Deficiency.Downstream of Valve HV 6212,150-200 Gallon Dead Leg Released Regardless of Dilution Flow Adequacy

ML20004D578
Person / Time
Site:	Fort Saint Vrain
Issue date:	05/27/1981
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20004D553	List: ML20004D552 ML20004D578
References
LER-81-036-01T, LER-81-36-1T, NUDOCS 8106090547
Download: ML20004D578 (1)

Text

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EVENT DESCRIPTION AND PROO A8LE CONSEQUENCES h IOI21l nO Thursday, May 14, 1981, at 1300 hours0.015 days <br />0.361 hours <br />0.00215 weeks <br />4.9465e-4 months <br /> it was determined that the concentration l 2

ITTT'l I of tritium in an unrestricted area following liquid waste release number 460, which l  !

I 1o141Iwas made on May 12, 1981, exceeded the limit specified in LCO 4.8.2(a). Reportable i  !

1 ITTT1 I per Fort St. Vrain Technical Specification AC 7.5.2(a)2. No accompanying occurrence. l l 0 l6 g l Reportable occurrences RO 80-52, 80-67, and 81-013 deal with a related subject area. l 10171 I l l I

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h j l i t a l IThe' design of the Fort St. Vrain licuid waste discharte system is inadequate to avoid I f I

m Iproblems arising from a 150-200 gallon dead leg downstream of automatic valve HV 6212 I iii7j lwhich is released regardless of dilution flow adequacy. Reliability of dilution flow I g l and possibility of relocating automatic valve closure capability upon inadequate

. I ii i4i l dilution flow being investigated. Final resolution to be submitted in a supplemental l  ;

7 s 9 report. so ST  % POWER OTHER STATUS SIS O RY DISCOVERY DESCRIPTlCN +

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p PHONE:

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