ML19249F014

RO 77-045:on 770916,found That Loss of Air Supply to Containment Bldg Purge Isolation Valves Will Result in Depressurization of Seal Rings.Caused by Valves Not Being Provided W/Redundant Supply to Maintain Seal Ring Pressure

ML19249F014
Person / Time
Site:	Palisades
Issue date:	09/30/1979
From:	CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
References
NUDOCS 7910030538
Download: ML19249F014 (1)

Text

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CORRECTD UCENSEE EVENT REPORT Palisades CONTROL BLOCK:l l l l l l l (pLEASE PRINT ALL REQUIRED INFORMATION) 1 6 UCENSEE UCENSE EVENT NAME UCENSE NUMSER TYPE TYPE loE 7 89 xlrl?IAlLl1l 14 lGl0l-l0l0l0l0l0l-l0l0l 15 25 l h l 1 l1l1l1l 26 30 l 0 l 1l 31 32 mEponT aEpenT TYPE SQURCE CCCXET NUMBER EVENT CATE AEPCRT DATE 01 CCNT l

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• l lT l lLl l 0l 5 l 0l-l 0 l 2 l 5 l 5l l0! 9l1l6l7l7 l 0 l 912 l 9l 7l 7 7 8 57 58 59 60 61 68 69 74 75 80 EVENT CESCRIPTION Ql 7 89 Investigation has revealed that loss of the air supply to the antain=ent building 80 l

Ql 7 89 purge isolation valtes (CV-1803, -1805, -1806, -1807, -1813 ant. -181h) vill result 80 l

hl in decressurizatien of thh s6rinesDeh eculd cause _ ss of containment intec ityl o5 "his failure node had not cea . in the FSAR. Seal tressures are beine 7 89 80 6 l Checked once per shift to verify operability of seal ri*ng air Sunply. (ER-77-Oh5) l 7 89 pseat corrected 80 SYsitM CAUSE COMpOMNT COMACNENT CoCa CecE CCupoNENT CCat supptan um;rACrunca votATioN 07 l Sl Dl W lVl Al LlVl Ej Xl l Al lCl5l8l7 [p_j 7 89 10 11 12 17 43 44 47 48 CAUSE CESCRIPTION gl The valves (Continental Equip / Type 9220) are not provided with a redundant air l 7 89 80 C9 l surply to naintain seal ring pressure.

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A redundant air source will be provided as l 7 89 80

] 0(_ scon as feasible. l racuTY

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ufTwoo cF 80 STA'US  % POWEA CTHER STATUS OtSCOVERY CISCOVERY CESCAlPTICN 11 l1l 0l 0l l N/A l d45 N/A l 7 8 9 10 12 13 44 48 80 CCRTENT RELEASE 0 AMOUNT CF ACTlVfTY LCCATCN CF RELEASE 12 d CFdRELEASE N/3 l l l N/a l 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE CESCAIPT1CN 3 l0l O! 0l l Zl l N/A l 7 89 11 12 13 , eo PERSONNEL INJUA;ES CESCATpT10N D.: 0

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ao FR02A3LE CONSEO.UETCES h; l 15 l N/A J 'J L U ~' 'l ' [ [ . /, (d) / /

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} l N/A / f 7 89 10 (- 80 PUBUC!TY ~b 7@D0%538

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17 i N/A e-7 89 i 50 AOCITIONAL FACTCAS bhbbkb3

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