ML18348A215

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)

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 *

* ~ ~ Palisades

• . --.,...CONTROL BLOCK: I I . . I I 6I . [PLEASE PRINT ALL REQUIRED INFORMATION]

1

.. LICEb!SEE LICENSE EVENT .

• NAME LICENSE NUMBER TYPE TYPE

~-I Ml"rl Pl Al LI ii 15 lo lol-lo Iola lolol-lo lo I l411lil1l1I Io I 1 I

. 9 . 14 25 26 30 31 32 CCCKl;T NUMBER EVENT CATE REPORT CATE

@ill coN'T r *1 1 7 8 57 58 lol5lol-I 01215151 lol2l1l6l1l1I lol2l3lol1l1I

~ 68 69 74 75 . 80 EVENT OESCRIPTION lal 21 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 SYSTEM CAUSE PRIME COMPONENT COMPON811T (ER-77-045) 80 w

COCE COOE COMPONENT COCE SUPPLIER MANUFACTURER VIOLATION

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

7 8 9 80

jo191 I to maintain seal pressure.. A redundant air source will be provided as soon as I 7 8 9 80

• ~ feasible . I

.~ METHOO OF 80 FACILITY

% POWER OTHER STATUS CISCO VERY OISCOVERY OESCRIPTION w

STATUS

Iill] 11 Io Io I N/A L£J .____ _ _ _ _ N,__/A_ _ _._ _ _ _ _.l 7 8 9 FORM OF 10 12 13 44 45 46 80 W I--___N/_A_ _ _ _I ACTIVITY CONTENT EJ~

RELEASEC W OF RELEASE AMOUNT OF ACTIVITY l.___.__________N_/_A___..._._________.I LOCATION OF RELEASE 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 7

IIEI lo I 010111 8 9 12 N/A 80 PROBABLE CQNSEQUENCES

)[Ifil N/A 7 8 9 80 LOSS OR DAMAGE TO FACILITY 7

'[ill 8 9 w

TYPE 10 DESCRIPTION 80 PUBLICITY EI?l N/A 80

~.

.18 7 8 9

. OOITIONAL FACTORS N/A 80

• illfil8 9 7 80