05000267/LER-1981-038-03, /03L-0:on 810507,two Class I Hydraulic Shock Suppressors Removed from Svc.Caused by Decision to Modify Suppressors to Original Configuration W/Zero Bleed Rate Block Valves

/03L-0:on 810507,two Class I Hydraulic Shock Suppressors Removed from Svc.Caused by Decision to Modify Suppressors to Original Configuration W/Zero Bleed Rate Block Valves

ML20009A550
Person / Time
Site:	Fort Saint Vrain
Issue date:	06/05/1981
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20009A543	List: 05000267/LER-1981-038, Forwards LER 81-038/03L-0.Detailed Event Analysis Encl 05000267/LER-1981-038-03, /03L-0:on 810507,two Class I Hydraulic Shock Suppressors Removed from Svc.Caused by Decision to Modify Suppressors to Original Configuration W/Zero Bleed Rate Block Valves
References
LER-81-038-03L, LER-81-38-3L, NUDOCS 8107130302
Download: ML20009A550 (1)

LER-1981-038, /03L-0:on 810507,two Class I Hydraulic Shock Suppressors Removed from Svc.Caused by Decision to Modify Suppressors to Original Configuration W/Zero Bleed Rate Block Valves

Event date:
Report date:
2671981038R03 - NRC Website

text

e U. S. NUCLEAR REGULATORY COMMISSION NRC FORM 366 W 771 LICENSEE EVENT REPORT CONTROL BLOCK: l l

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60 61 DOCKET NUM8 ER 68 69 EVENT DATE 74 75 REPORT C ATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h Io I l l During normal operation, two Class I hydraulic shock suppressors were removed from j

j o ;3; l service. Reportable per Fort St. Vrain Technical Specificatiort AC 7. 5. 2(b)2 as a de-l lolal I graded mode of LCO 4.3.10.

Similar reports are Ro 80-63 and 79-13.

There was no af-]

fect on the safety or health of the public.

The snubbers removed were VSS-123 and l

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l lojeil VSS-113.

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10181 l 80 SYSTEM

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12 13 18 19 20 SEQUE NTI AL OCCURRENCE RE50RT REVISION LER RO EVENT YE AR REPORT NO.

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.>ti 34 40 41 42 43 44 47 CAUSE CESCRIPTION AND CORRECTIVE /4. IONS h lt l 0 l l Non bleeding hydraulic vent stock shock suoeressors were reclnced hv enen v4th hivod I lt ;ij l capacity. Engineering evalutation determined that the bleed rate should be zero and I Latter evaluations deter-1 g,,,j l the snubbers were adjusted to zero bleed rate in place.

l mined the shock suppressors should be returned to originr.1 non-bleeding configuration.]

g,;3, g l Two snubbers were removed from service, one was modified and both returned to service 7

8 9 STA S

% POWER OTHER STATUS IS O RY D.SCOVERY DESCRIPTION li 15 l dh l o l 7 I o lhl N/3 l

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