05000285/LER-1979-007-01, /01T-3:on 800305,during Review Required by IE Bulletin 79-01,Barksdale Pressure Switch Not Found Environmentally Qualified.Caused by Switch Not Being Properly Specified for Intended Svc.Switch Will Be Upgraded

/01T-3:on 800305,during Review Required by IE Bulletin 79-01,Barksdale Pressure Switch Not Found Environmentally Qualified.Caused by Switch Not Being Properly Specified for Intended Svc.Switch Will Be Upgraded

ML19312D510
Person / Time
Site:	Fort Calhoun
Issue date:	03/19/1980
From:	Mehaffey R OMAHA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19312D500	List: 05000285/LER-1979-007-01, /01T-3:on 800305,during Review Required by IE Bulletin 79-01,Barksdale Pressure Switch Not Found Environmentally Qualified.Caused by Switch Not Being Properly Specified for Intended Svc.Switch Will Be Upgraded ML19312D499
References
LER-79-007-01T, LER-79-7-1T, NUDOCS 8003240524
Download: ML19312D510 (3)

LER-1979-007, /01T-3:on 800305,during Review Required by IE Bulletin 79-01,Barksdale Pressure Switch Not Found Environmentally Qualified.Caused by Switch Not Being Properly Specified for Intended Svc.Switch Will Be Upgraded

Event date:
Report date:
2851979007R01 - NRC Website

text

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(7 77L LICENSEE EVENT REPORT o@

CONTROL BLOCK: l l

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l l

l (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

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60 61 COCK ET NUMBER 68 59 EVENT C ATE I4 75 RE*CRT OATE 30 EVENT DESCRIPTION AND PRCB ASLE CONSEQUENCES h I o 12 I l During the review required by IE 79-013 the Barksdale pressure switch which inter-I locks with'a contain=ent isolation signal to isolate the instrument air header en I

t o i 3, j l o 14 l l lov header pressure and containment isolation was found to not have enviren= ental 1

l0,sl l qualifications. The operators have been instructed to manually isolate the contain- ]

lo se 1 l =ent instru=ent air header if low pressure is indicated during an accident.

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8 9 SYSTEM

CAUSE

CAUSE COVP.

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10 11 12 1J 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVl510N Lgg a0 EVENTvEAR REPORT NO.

CCOE TYPE NO.

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33 J4 35 36 37 40 di 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h l i t oj l The 3arksdale D2T pressure svitch was not srecified croreriv fer its intended serrice]

It lil l The oterstors have been instructed to isolate instr. ent W to tha c ~+ C -- t l during an accident if the system shows lov pressure.

The pressure switch vill be l

i1,7l g,;3; l upgrading to LOCA qualifications or moved to a less severe environment.

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% PCWER OTl4ER STATUS 015 RY CISCOVERY OESCRiPTION IE Bulletin 70-013 l

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CO# TENT AMOUNT OF ACTIVITY @ l LOCATION OF REMASE @

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PERsCNNE N u'4Es oEsCRiPTiON@

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LIP.79-007, Supplement 3

. Omaha'Public Power District' Fort'Calhoun Statica Unit-No. 1-Docket No.LO5000235 Attachment No. 1

Safety Analysis

The pressure switch PC-16h9 serves to isolate the containment instrument-air header if the pressure falls belov -70 psig and containment isolation is required. The instrument air header is left in service to enhance shutdown

. operation.

~In the event that the header and pressure switch fail, adequate in-strumentation exists outside the containment to detect a lov system pressure.

'At' this-time the header =ay be manually isolated. An operations memorandum has been issued to instruct the operators to isolate the header on-lov pres-

~

.sure.

In the long term, an Engineering Evaluation Assistance Request vill be issued to upgrade the pressuma.svitch to LOCA qualifications or to =ove the-existing pressure switch cutside containment.

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/ Docket No.-105000235:

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LAttachment No. 2

. Failure Data.

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