ML20009A550

LER 81-038/03L-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

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: ML20009A542 ML20009A550
References
LER-81-038-03L, LER-81-38-3L, NUDOCS 8107130302
Download: ML20009A550 (1)

Text

e U. S. NUCLEAR REGULATORY COMMISSION NRC FORM 366 W 771 LICENSEE EVENT REPORT CONTROL BLOCK: l l 1 I I l lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) lo !il8 9IC loLICENSEE Ir lSCODE lv i1 l@lo lo l- Io lo lo lo lo l- lo lo l@l al llLICENSE 25 26 112l TYPE ol@l JO l

57 CAT 58 Ig 7 is 15 LICENSE NUMBER CON'T 10111 S$RCE dlo l s lo lo 10 l216 l7 hjolsln 68 69 17 19 11 @ln l 6I ol sl Rl !l@

EVENT DATE 74 75 REPORT C ATE 80 7 8 60 61 DOCKET NUM8 ER EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h j Io I l l During normal operation, two Class I hydraulic shock suppressors were removed from 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-]

lol3; ; fect on the safety or health of the public. The snubbers removed were VSS-123 and l l

lojeil VSS-113.

1 10171 1 l

10181 l 80 CAUSE COYP. VA LV E SYSTEM CAUSE CODE CODE SUSCODE COMPONENT CODE SUSCODE SUSCOCE 10191 l v Iv l@ lx J@ LxJ@ l s I u I r i o I a i r l@ Lp_J@ tz_J @ 18 19 20

' 9 f0 ti_ 12 13 s REVISION SEQUE NTI AL OCCURRENCE RE50RT REPORT NO. CODE TYPF No.

EVENT YE AR

@ ,aeg LER RO 1811l l-l 1013181 1/l 10131 It I l-1 lol 32 u 24 26 27 28 29 30 31

_ 21 22 23 HOURS S B t O FOR1h 8. SU PL E MAN FACTURER TAK N A O ON PL NT *T LxJ@LzJ@ LzJ@ Iz_J64 IoIoIoIoI 34 40 LvJ 41

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44 47 33 34 36 .>ti 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 g,,,j l the snubbers were adjusted to zero bleed rate in place. Latter evaluations deter- 1 g,;3, l mined the shock suppressors should be returned to originr.1 non-bleeding configuration.]

g l Two snubbers were removed from service, one was modified and both returned to service 7 8 9 IS O RY D.SCOVERY DESCRIPTION STA S  % POWER OTHER STATUS l Wh[ Eeview of St ation Logs l li 15 l dh l o l 7 I o lhl N/3 _

ACTIVITY CONTENT LOCATION OF RELE ASE RELEASED OF RELE ASE AYOUNT OF ACTIVITY I

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' * * ,ERSOw'L i~J'IES

% veer oESCniPTiON@ l li, l 48l9l ol of ol@l N/A i, i2 8o LOSS OF OR D AM AGE TO F ACILITY TYPE DESCRIPTION I

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• 3 ' 8107130302 810605 NRC USE ONLY 8

" PDR ADOCK 05000267 issue o SCRiPTiON h l lllllllllI!!2 l2loj h N/A __

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7 9 7 to NAME OF PREP ARER y

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