ML20151C190

RO P-1-76:on 760119,inadequate Design Pressure Ratings Found on Relief Switches DPS-9051 & 9052,transmitter PT-173 & Reactor Protection Containment Pressure Switches PS-664,665, 666 & 667.Caused by Inadequate Design Specs

ML20151C190
Person / Time
Site:	Big Rock Point File:Consumers Energy icon.png
Issue date:	01/20/1976
From:	Sewell R CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
RO-P-1-76, NUDOCS 8103090150
Download: ML20151C190 (2)

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• 4. IDENTIFICATION OF OCCURRENCE - CONTAIMMENT' PRESSURE ~AND

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r:: 'i . DESCf:IPTION OF OCCUnnZNCE DURIN3 REVIEN OF TESTING RE0VIRE-D NEUIS ASSOCI ATED '<.'ITH 10 CFR 50, APPENDIX J, THE TOLLO'.!IllG -IN-f.i STi:U'!E!iT AND CONTFs0LS WERE IDENTIFIED AS HAVIN3 ' INADEQUATE DESIGi!

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P( f 8. M!$ LYSIS OF OCCURRENCE - THE POCCIPILITY EXISTS THAT AUTO'MTIC CC' T AI' y"I Vt.CUU1 r.ELIEF FUNCTION VOULD NOT DE OPER ABLE IN THE

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L$ t."TE.1 BEI3 EXPOSED TO PRESSURES GREATER THAN 15 PSIG.

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.n. PG-56r THr.0U'M 557 ARE DEEMED ADEQUATE FOR THEIR SCRAM ISOLATI0')

Fuf:CII0'! SI':CE IT OCCURS AT A PT.ESSUiG FAR LO'.'Eff THAN THE PRESSU.' E i- -

! vt!IC" "OULD A USE S ITCH DIS ABILITY. PT-173 UD'dLD PROBABLY RUMUEE F '

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9. COMEC1 IV? ACT10*! - PROCEDURAL CD'JTROLS TO ISOLATE PT-173 AND dos-9.%) /.Nn 'OS-9052 AND SUBSE9UENTLY RETuriN TO OPERATIOil AT

[l, ' ;;- P;;ESSJ:'ES LEOS THAM 13 PSIG ARE BEING DEVELOPED.

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