ML19347A950

LER 80-047/03L-0:on 800825,several Hydraulic Snubbers Were Found Inoperable.Caused by Improper Hot Position Adjustment on Constant Support Hangers.Snubbers Repaired or Readjusted

ML19347A950
Person / Time
Site:	Fort Saint Vrain
Issue date:	09/24/1980
From:	Gibson J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19347A942	List: ML19347A941 ML19347A950
References
LER-80-047-03L, LER-80-47-3L, NUDOCS 8009300563
Download: ML19347A950 (1)

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NRC FO~M 384 U. S. NUCLEAO RESULATCRY COMMISSION (7 77) 1.lCENSEE EVENT REPORT l CONTROL 8 LOCK: l l l l l l (PLEASE PRINT OR TYPE. ALL REQUIRED INFORMATION) l l Io I st 9l l ClvCENsEE 7 0l FlCOoE Sl Vl 1l@is 0 l 0 l uCEssENvM8ER i4 -l 0 l 0 l 0 l 0 l 0 l -@l 2n l 2eO4 ll 10 l 1 l 2 l 01@ls7 CAT sa @

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EVENT OESCRIPTION ANO PROSA8LE CONSEQUENCES h I o i 2 I l On August 25. 1980, while operating at 50% thermal never and t50 W electrical cover. I l o l a i i a scheduled surveillance showed several hydraulic snubbers to be inoperable. Nine of I l o 141 l these snubbers could not be repaired in the 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> period allowed by LCO 4.3.10, and l l o i s i I a 36 hour4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> orderly shutdown period was entered. This caused the plant to begin a l l o l6 l l Scheduled maintenance period one day early. No affect on public health or safety. ,

I o I 7 I l Shutdown reouired by LCO 4.3.10." D.eportable oer Fort St. Vrain Teebnical Specifica- l l o i a i i tion AC 7.5.2(b)2. I SE'E "#"$t C0 sNCO$E COMPONENT CODE Su8 " 'E O Su E l Hl Bl@ [Bj@ l A l@ l S l U ; P l 0 lR lT lh l Dl@ J @

[TlT] 20 4 9 10 11 12 13 18 19

_ SEQUENTIAL OCCURRENCE REPORT REVISION LER Ro E REPORT No. CCCE TYPE No.

@ag l 8l0l 21 VENT YEAR 22 l-l 23 l0l4l7l 24 26 l/l 27 l0 l3 l 28 29 lL l 30 l-l 31 W

32 N AC ON oP NT M MouR$ $8 t PoR 8. $UP La MANuP C RER lsl@lsl@ IAl@

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se 3 lolol21ol 40 LeJ@

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I CAUSE DESCRIPTION AND CORRECTIVE ACTIONS l i l o l l Investigation of the problem revealed the ennstant sucoort hanu rs (sorine haneers) I l i li i l vere not properly adjusted for the hot position: These hangers were not carrving the I

,,,7, l appropriate loads in the hot positions. The affected~ snubbers were repaired or re- l g l adjusted as required and the plant was shutdown in accordance with the requirements l gof LCO 4.3.10. Snubber repair was completed during scheduled maintenance shutdown 1 7 a ,perloo. surveillance interval ad ted to 31 days. 80

'sTDN  % POWER oTHER STATUS 31 Y OISCOVERY DESCRIPTICN li is i LEJ@ l o I 5 I o l@l N/A I I 8 l@l aoutine scheduted surveittsnee Test i ACTIVITY CO TENT RELE Asto Op mELEASE A.JOUNT OP ACTtVITY LOCATION OP RELEASE WW7 4 9

@ [Z_]gl N/A to is 44 l l N/A 45 40 l

PER$oNNEL EXPOSURES NUM8ER TYPE DESCRIPTio4 y l 0] 0l 0l@ J @ l N/A l PERsoNNE'L iNau'd.Es Nuv8ER ;EsCRiPTioN@

7 i a 8 9 l0l0l0l@l N/A11 12 80 l

LOSS OP oR OAMA JE To FACILITY TYPE DESCR PTION I

• I 98 I9Lz_l@LN/A I 80 8009300 7 to PutuciT- -f NRC usE cNtY issuto Mg r lllllllIllIll:*:

m LNJ@oE4CRiPTioN lN/A l NAME OF PREPARER N PHONE: 303) 785-2253