05000267/LER-1980-047-03, /03L-0:on 800825,several Hydraulic Snubbers Were Found Inoperable.Caused by Improper Hot Position Adjustment on Constant Support Hangers.Snubbers Repaired or Readjusted

/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: 05000267/LER-1980-047, Forwards LER 80-047/03L-0
References
LER-80-047-03L, LER-80-47-3L, NUDOCS 8009300563
Download: ML19347A950 (1)

LER-1980-047, /03L-0:on 800825,several Hydraulic Snubbers Were Found Inoperable.Caused by Improper Hot Position Adjustment on Constant Support Hangers.Snubbers Repaired or Readjusted

Event date:
Report date:
2671980047R03 - NRC Website

text

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/s REPORT CATE 80 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.

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42 42 4A 47 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

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surveillance interval ad ted to 31 days.

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