05000255/LER-1976-001, :on 760110,while Filling Reactor Cavity from Sirw Tank W/Safety Injection Pump,Unusual Noise Investigation Revealed Slightly Dented Sirw Tank.Caused by Vacuum in Tank Due to Plugged Vent W/Snow & Ice
| ML20085E623 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 01/23/1976 |
| From: | Bixel D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| Shared Package | |
| ML20085E626 | List: |
| References | |
| LER-76-001, LER-76-1, NUDOCS 8308150446 | |
| Download: ML20085E623 (2) | |
| Event date: | |
|---|---|
| Report date: | |
| 2551976001R00 - NRC Website | |
text
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LI EE EVENT REPORT
/m Palisad:s CONTROL BLOCX:l l
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(PLEASE\\-%.3h ALL RELUIRED INFIRMA 1
6 UCENSEE LCENSE EVENT NAME LCENSE NUMBER TYPE TYPE j lM lIl P l Al Ll 1l l0 l 0 l-l O l Ol 0l 0l Ol-l 0 l 0.l lk l 1l1l 1l 1l l0l1l 7 89 14
.15 25 26 30 31 32 TYP S
DOCKET NUMBER EVENT CATE REPCAT DATE O 1 CONT l l
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l lO 15101-101215l 51 l 0 l1l1l ol 7l 6l l0 l1 l213 l7 l6 l 7 8 57 58 59 60 61 68 69 74 75 80 EVENT OESCR:PTION HB lThe reactor cavity was being filled from the SIRW tank with an SI pump.
Investigation l 7 89 80 M l of an unusual noise revealed that the SIRW tank was slightly dented near the top.
l 7 89 80 EE l hpf a operator action teminated the tank draining within 2 minutes of the denting l
7 89 eo E l occurrence (noise) and no significant damage to the tank occurred (ER-76-01).
l 7 89 80 EE I i
7 89 80 paug SYSTEM
CAUSE
CCMPCNENT COMPONENT COCE CCCE CCMPONENT CCCE SUPSM A MatAFAwM VOLATCN SE l S l F l lB l lX l X l X l Xl Xl Xl lAl lz 19 l919 l [N J 7 89 10 11 12 17 43 44 47 48_
CAUSE DESCRIPTION O8 l Investization revealed that the vent screen hcd become plugged with ice and snow caus-l 7 89 80 09 l ing a vacuum to occur in the tank as it was draining.
The vent screen was tenporarily l 7 89 80 F
l -nvaa m.a 9a tank aented area retumed to no mal.
A tank leakage test has been l
% POWEA CTHEA STATUS OtSCOVERY 06COVERY CESCAiPTON 8
[xj lololoi l NA l
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NA l
7 8 9
10 12 13 44 45 46 80 ACTMTV CONTENT RELEASED OF AELEASE AMOUNT OF ACTMTV LOCATCN OF AELEASE Iz I Lz_J l
NA I
I NA I
7 8 9
10 11 44 45 80 PERSONNEL EXPOSUAES NUMBEA TYPE DESCA.PTON 1
l olo lo l Izl I
NA l
7 89 11 12 13 80 PEASONNEL INJUAiES NUM'6E R DESCRIPTCN l 0l0 l0 l l
NA l
14 7 89 11 12 80 Probable Consequences 15 l Could have damaged tank and/or orevented full use of the SIRW.
l 7 89 80 LOSS OR OAMAGE TO FACILITY TYPE DESCRIPTON dl NA l
1 8150446 760123 7 89 10 80 ADOCK 05000255 PUBLICITY g
17 l PDR NA l
7 89 eo l
l ADDITIONAL FACTORS h l (Continued From Line 10) conducted satisfactorily and tha vent will be redesigned to l 7 89 80 19 l c4 -ra inrea vent hole onenine.
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7 89 "
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General Offices: 212 West Michsgen Avenue, Jackson, Michigan 49201. Area Code 517788-0550 January 23, 1976 4
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Mr James G. Keppler Office of Inspecticn Enforcement Region III US Nuclear Regulatory Co= mission C) 4 D'
799 Roosevelt Road
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0 Glen Ellyn, IL 60137 m
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 malfunction 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.
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David A. Sixel f
Assistant Nuclear Licensing Administrator
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- 1976