05000267/LER-1981-036-01, /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

/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:
References
LER-81-036-01T, LER-81-36-1T, NUDOCS 8106090547
Download: ML20004D578 (1)

LER-1981-036, /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

Event date:
Report date:
2671981036R01 - NRC Website

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EVENT DESCRIPTION AND PROO A8LE CONSEQUENCES h IOI21l n 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

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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.

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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

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PERSONNEL EXPOS ES I

NUMBER TYPE

DESCRIPTION

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DESCRIPTION

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