05000312/LER-1981-017, Forwards LER 81-017/03L-0 & Submits Detailed Event Analysis

Forwards LER 81-017/03L-0 & Submits Detailed Event Analysis

ML20003F838
Person / Time
Site:	Rancho Seco
Issue date:	04/16/1981
From:	Mattimoe J SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20003F839	List: 05000312/LER-1981-017, Forwards LER 81-017/03L-0 & Submits Detailed Event Analysis 05000312/LER-1981-017-03, /03L-0:on 810316,unistrut Cable Tray Support H-80 Found 3 Ft Out of Position & Not Fastened W/Anchor Bolts. Probably Caused by Relocation to Facilitate Movement of Equipment.Support Relocated & Fastened
References
NUDOCS 8104230688
Download: ML20003F838 (2)

LER-1981-017, Forwards LER 81-017/03L-0 & Submits Detailed Event Analysis

Event date:
Report date:
3121981017R00 - NRC Website

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SACRAMENTO MUNICIPAL UTILITY DISTRICT CJ 6201 S Street. Box 15830. Sacramento. California 95813; (916) 452 3211 April 16, 1981

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c' R. H. ENGELKEN, OIRECTOR 9}

gRS 3 REGION V 0FFICE OF INSPECTION & ENFORCEMENT 8'p#gg

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U. S. NUCLEA.R REGULATORY COMitlSSION g

1990 NORTH CALIFORNIA BOULEVARD s

WALNUT CREEK PLAZA, SulTE 202 4

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WALNUT CREEK CA 94596 OPERATING LICENSE DPR-54 OOCKET NO. 50-312 REPORTABLE OCCURRENCE 81-17 in accordance with. Technical Specifications for Rancho.Seco Nuclear Generating Station, Section 6.9.4.2b, and Regulatory Guide 1.16, Revision 4, Section C.2t,(3), the Sacramento Municipal Utility District is hereby subm.itting a thirty-day report of Reportable Occurrence 81-17 On March 16, 1981, while reviewing recent NCRs (Non Conformance Reports), it was found that a particular cable tray support, designated as Support No. H-80, was not located in its proper position.

The support, located in the Reactor Building in the vicinity of ti.e letdown coolers, is a typical "unistrut" l

cable tray support normally fastened via concrete anchor I

bolts.

Design d'rawings and the location of imbedded concrete anchors indicated the proper location of the support.

Rather than being in its proper location, the support was found relocated approximately three feet and not fastened via its anchor bolts.

A NCR was written, a work request processed, the support relocated to its proper position and fastened in place.

This particular support's location is in a heav ly ' traversed area.

It is probable that the support was unfastened and relocated to facilitate movement of equipeent and inadvertently not returned to its proper position.

Since there have been..o previous similar occurrences, it is the District's contention

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y-R. H. Engleken April 16, 1981 that this occurrence was an isolated case.

Further corrective action is deemed unnecessary unless a future recurrence warrants otherwise.

There were no plant transients nor power reductions associated with this event.

fb John U. Mattimoe Assistant General Manager and Chisf Engineer cc:

ISE Oashington (30)

MIPC (3)

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