ML18353A841

Licensee Event Report ER-76-01 - Sirw Vent Plugged

ML18353A841
Person / Time
Site:	Palisades
Issue date:	01/23/1976
From:	Bixel D Consumers Power Co
To:	James Keppler NRC/RGN-III
References
LER 1976-001-00
Download: ML18353A841 (2)

Text

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consumers

• Power company General Offices: 212 West Michigan Avenue, Jackson, Michigan 49201

• Area Code 517 788-0550 January 23, 1976

~:egulatory Docket FU~

Mr James G. Keppler Office of Inspection Enforcement Region III US Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 DOCKET 50-255, LICENSE DPR-20 PALISADES PLANT, ER-76-01, SIRW VENT PLUGGED Attached is a reportable occurrence which relates to the Palisades Plant and has been classified as a failure or mal~.lllction which could prevent the fulfillment of the functional requirements of a system used to cope with accidents analyzed in the FSAR. Rapid operator action prevented any damage to the plant or release to the environment.

David A. Bixel Assistant Nuclear Licensi.ng Administrator CC: File

• (. e 1976 b

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LI.SEE_. EVENT REPORT Palisades CONTROL BLOCK: .._I--L..-..1.l---1.*l___,,l_-....JIL-....ll (PLEASE.PRINT~ REQUIRED INFORMATION) 1 6 LICENSE EVENT LICENSE NUMBER TYPE . TYPE Io Io 1-1 o I o I o I oI ol -1 o I o. I 14 I l 11 I l I l I Io 11 I 15 25 26 30 31 32 7

@E] CON'T .....

8 1 __.____.1 57 58 REPOR1 rPE1 59 sue REPORT 60 61 DOCKET NUMBER lol5lol-lol2l 5l 5l

. 68 69 EVENT DATE 1011111011161 74 75 REPORT DATE 1011121311161 80 EVENT DESCRIPTION lol2I !The reactor cavity was being filled from the SIRW tank with :an SI pump. Invest_igation I 7 8 9 80 lol31 lof an unusual noise revealed that the SIRW tank was slightly dented near the top. I 7 8 9 . . 80 lol41 IRapja operator action terminated the tank draining within 2 minutes of the denting I 7 8 9 80 lol51 I occurrence (noise) and no significant damage to the tank occurred (ER-76-01). J 7 8 9 80

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7. 8 9 PRIME 80 SYSTEM CAUSE COMPONENT COMPONENT CODE CODE COMPONENT CODE SUPPLIER MANUFACTURER VIOLATDN 7

@El 8 9 10 Wl'J w 11 Ix I x I x I xi xi xi 12 17 L!J 43 44 Iz I 9 I9 I9 I 47 l!J 48.

CAUSE DESCRIPTION lol0I I Investigation revealed that the vent screen had become plugged with ice and snow caus- I 7 8 9 80

~ I ing a vacuum to occur in the tank as it was draining. The vent screen was temporarily I 7 8 9 80 I removed and the tank aentea area returned to normal. A tank leak.age test has been I

• 9 .

FACILITY METHOD OF 80 STATUS  % POWER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION EE] lliJ I 0 I 0 I0 I l.____ _;.NA _ ___.I L'.:.J NA.

7 .8 9 10 12 13 44 45 46 80 FORM OF ACTIVITY CONTENT 7

rn 8 RELEASED

~

9 OF RELEASE L£.1 10 AMOUNT OF ACTIVITY

. . _ I_ _ _ _

11 N..;. . A_ _ __.I .

44 45 LOCATION OF RELEASE NA 80 I

PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION

[ill.I olo lo 11I . W 7 8 9 12 . 13 NA 80 PERS'ONNEL INJURIES NUM'BER DESCRIPTION EE]lololol NA 7 8 9 11 12 80 Probable Consequences EJfil I Could have damaged tank and/or prevented full use of t~e SIRW.

7 8 9 80 LOSS OR DAMAGE TO FACILITY TYPE DESCRIPTION

~ lli.J NA.

7 '8 9 10 80 PUBLICITY

(!El8 9j....._..~~~~~~~~~-----~---:~~~~~~~N~A~;__~~~~~~~~~~~~~----l 7 80 I

7 8* 9 ADDITIONAL FACTORS I (Continued From Line 10) conducted satisfactorily and the vent ~11 be redesigned to 80 I

illfil89I g11re a 1 arger open area and a 1 arge yent hole opening.

7

! =.... 80

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