ML19305C061

LER 80-006/03L-0:on 800218,w/reactor at Less than 2% Power, Vent Stack Snubber VSS-117 Was Inoperable & Degraded Mode of Tech Spec LCO 4.3.10 Existed.Caused by Taking Reactor Critical W/Vent Stack Snubber Out of Svc for Maint

ML19305C061
Person / Time
Site:	Fort Saint Vrain
Issue date:	03/19/1980
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19305C059	List: ML19305C058 ML19305C061
References
LER-80-006-03L, LER-80-6-3L, NUDOCS 8003250537
Download: ML19305C061 (1)

Text

NRC FORM 364 U. S. NUCLEAO R E!ULATCY COMMISSION

. . LICENSEE EVENT REPORT CONTROL eLOCx: l l l l l l l (PLEAsE PRINT OR TYPE ALL REQUIRED INFCCMATION)

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68 lg 7 8 9 UCENSEE CODE 14 15 uCENSE NLMBER J

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i 8 60 St DOCKET NUMagR 68 69 EVENT DATE EVENT DESCRIPTION AND PROBA8LE CONSEQUENCES h lTITI l On February 18, 1980, with the reactor critical at less than 2Z power, it was l ITTTII determined that a vent stack snubber, VSS-117, was inoperable and a degraded mode of I lo l4I I Fo rt S t. Vrain Technical Specification LCO 4.3.10 existed. This is reportable per I ITTTI l Fort St. Vrain Technical Specification AC 7.5.2(b)3. The reactor was taken sub- l  !

iTTii1 I critical and remained suberitical till the snubber was replaced. No accompanying oc-l lo til I currence. No affect on public health or safety. A similar occurrence was RO 79-64. l I

10181 1 so 7 es CE oE SU C E COMPONENT CODE 508 DE SU E lTI n I A l A lh [A_jh l C lh l Sl Ul Pl 0l Rl Tlh Wh [_Z_j h 13 18 19 20 7 8 9 10 11 12 SEQUENTIAL OCCURRENCE REPORT REVISION gggjag EVENTYEAR REPCRT No. CCCE TYPE No.

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44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS @

gl VSS-117, a vent stack snubber, was removed from service during a maintenance shut- I

['iTO l dcwn without informing the Shif t Supervisor. On February 17, 1980, the reactor was I

, l taken critical with operations personnel unaware that VSS-117 had been removed. I gl Personnel involved were reprimanded and the igortance of following approved pro- l gl cedures re-emphasized. No other corrective action anticipated or required. I 7 e e s0 A 4 POWER OTHER STAT 1.is 01 MY Disco 4ERY DESCRI TION i 5 (_C,_j @ lo 10 11 l @ lN/A l W@l Plant Personnel Observation l 1

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