05000255/LER-2077-045, License Event Report 1977-045-00 Re Containment Building Isolation Valves

License Event Report 1977-045-00 Re Containment Building Isolation Valves

ML18348A215
Person / Time
Site:	Palisades
Issue date:	09/30/1977
From:	Hoffman D Consumers Power Co
To:	James Keppler NRC/RGN-III
References
LER 1977-045-00
Download: ML18348A215 (2)

LER-2077-045, License Event Report 1977-045-00 Re Containment Building Isolation Valves

Event date:
Report date:
2552077045R00 - NRC Website

text

consumers Power company J

General Offices: 212 West Michigan Avenue, Jackson, Michigan 49201

• Area Code 517 788-0550 September 30, 1977 Mr James G Keppler Office of Inspection and Enforcement Region III US Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 DOCKET 50-255 - LICENSE DPR PALISADES PLANT - ER-77 CONTAINMENT BUILDING ISOLATION VALVES Attached is a reportable occurrence relating to the containment isolation valves at the Palisades Plant.

David P Hoffman Assistant Nuclear Licensing Administrator CC:

ASchwencer, USNRC

- ocr s 1977

.. ~, *..

I lCENSEE EVENT REPORT

• . --.,...CONTROL BLOCK: I 1

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Palisades I

I I I [PLEASE PRINT ALL REQUIRED INFORMATION]

6 LICEb!SEE

• NAME LICENSE NUMBER

~-I Ml"rl Pl Al LI ii 9

. 14 lo lol-lo Iola lolol-lo lo I 15 25 LICENSE TYPE l411lil1l1I 26 30 EVENT.

TYPE Io I 1 I 31 32 CCCKl;T NUMBER EVENT CATE REPORT CATE

@ill coN'T r

• 1 ** 1 7

8 57 58 lol5lol-I 01215151 lol2l1l6l1l1I lol2l3lol1l1I

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68 69 74 75 80 EVENT OESCRIPTION lal21 I Investigation has revealed that loss of the air supply to the containment building I

.7 89 00*

flol31 I purge isolation valves ( CV-1803, 1805, 1806, 1807, 1813 and. 1814) will result in I

7.

8 9 80 lol41 I depressurization of the seal bladders, which could caus.e loss of containment in- *

. I 7

8 9 80 lolsl

• 1 tegrity.

This failure mode had not been considered in the FS.AR.

Seal pressures I

7 8 9 80

lol61 I are being checked once per shift to verif'y operability of seal bladder air supply.

)

. 7 8 9 PRIME (ER-77-045) 80 SYSTEM

CAUSE

COMPONENT COMPON811T COCE COOE COMPONENT COCE SUPPLIER MANUFACTURER VIOLATION

.@El I 8 I D I ~ Iv I A I LI v I EI x I w

I c I 5 I 8 17 I l!J 7

8 9 10 11 12 17 43 44 47 48 CAUSE OESCRIPTION.

fol0I I The valves (Continental Eq_uip/Type 9220) are not provided with a redundant. air 7

8 9

jo191 I to maintain seal pressure..

7 8 9

• ~ feasible.

. ~

FACILITY A redundant air source will be provided as soon as STATUS

% POWER OTHER STATUS METHOO OF CISCO VERY OISCOVERY OESCRIPTION supply I*

80 I

80 I

80

Iill] w 11 Io Io I N/A L£J N,__/ A ___

. ____ _.l 7

8 9

10 12 13 44 45 46 80 FORM OF ACTIVITY CONTENT EJ~

RELEASEC OF RELEASE I AMOUNT OF ACTIVITY W

W --___

N/_A ____ I LOCATION OF RELEASE l.___. __________ N_/_A __ _..._. ______ ___.I 7

8 9

10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE OESCRIPTION ITEi 1010101 L!.J N/A 7

8 9 11 12 13 80 PERS'ONNEL INJURIES NUMBER OESCRIPTION IIEI lo I 0101 N/A 7

8 9 11 12 80

)[Ifil PROBABLE CQNSEQUENCES N/A 7

8 9 80 LOSS OR DAMAGE TO FACILITY TYPE

DESCRIPTION

'[ill w 7

8 9 10 80 PUBLICITY EI?l N/A

~

80 OOITIONAL FACTORS N/A

. 1 8 7

8 9 80

• illfil 7

8 9 80