ML17317B070

LER 79-017/03L-0 on 790312:spent Fuel Pit Exhaust Ventilation Unit Flow Failed to Meet Acceptance Criteria. Caused by Slight Closing of Intake Grills Due to Sys Vibration.Grill Damper Linkage Securely Fastened

ML17317B070
Person / Time
Site:	Cook
Issue date:	04/03/1979
From:	Beilman T INDIANA MICHIGAN POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17317B068	List: ML17317B067 ML17317B069 ML17317B070
References
LER-79-017-03L, LER-79-17-3L, NUDOCS 7904090190
Download: ML17317B070 (2)

Text

NRC FORM 366 U. S. NUCLEAR REGULATORY COMMISSION LICENSEE EVENT REPOR r+

CONTROL BLOCK: Qi (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 6 Q4~

I N I 0 C C 1 Qz 0 0 0 0 0 0 0 0 0 0 0 Q3 A 1 1 1 1 Qs 7 8 9 LICENSEE CODE 14 LICENSE NUMBER 25 26 LICENSE TYPE 30 57 CAT 58 CON'T

~oi REPoRT

~LQB 0 5 0 0 0 DOCKET NUMBER 3 1 5 68 Q7 69 0 3 1 2 EVENT DATE 7 9 74 Qs 0 75 4 0 3 REPORT DATE 7 9 80 0

EVENT DESCRIPTION AND PROBABLE CONSEQUENCES ~10 DURING A ROUTINE SURVEILLANCE TEST IT WAS DISCOVERED THAT THE SPENT FUEL PIT EXHAUST VENTILATION UNIT FLOW FAILED TO MEET THE ACCEPTANCE CRITERIA IDENTIFIED IN T.S. 4.9.12

~OB

~O7

~OS 80 7 8 9 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE

~09 ~Ap E ~BQR X X X X X X ~ZQTE ~Z

~

OTT Gz QT4 QTE 7 8 9 10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION Q17 LERiRP REPQRT ACTION FUTURE EY+NT+EAR 21 22 EFFECT

+23 SHUTDOWN

~01 24 REPORT NO.

7 26 QH 27

~0~

28 ATTACHMENT CODE 29 NPRDQ TYPE

+L 30 PRIME COMP.

31 NO.

32 0

COMPONENT TAKEN ACTION ON PLANT METHOD HOURS +22 SUBMITTED FORM SUB. SUPPLIER MANUFACTURER

~BOER ~KQig ~2OEE ~ZOET 0 0 0 0 +N Qzz ~NQz4 ~NORE A 2 0 Qzs 33 34 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS &27 THROUGH INVESTIGATION THE CAUSE LNS DETERMINED TO BE THE UNIT'S INTAKE GRILLS WHICH APPEARED TO HAVE CLOSED SLIGHTLY DUE TO SYSTEM VIBRATION. THE GRILLS WERE REOPENED AND THE TEST WAS PERFORMED WITH SATISFACTORY RESULTS. TO PREVENT RECURRENCE, THE GRILL DAMPER LINKAGE WAS SECURELY FASTENED TO PROHIBIT INADVERTANT 3

MOVEMENT.

4

~O 7 8 9 80 FACILITY STATUS NP POWER OTHER STATUS Q METHOD OF DISCOVERY DISCOVERY DESCRIPTION Q32 CQ LJO 5 E 26 1 0 0 29 NA 44

~BQ31 45 46 SURVEILLANCE TEST 80 ACTIVITY CONTENT RELEASED OF RELEASE AMOUNTOF ACTIVITYQ36 6 ~Z Q33 ~ZQ34 NA NA 7 8 9 10 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION +39 7 ~00 0 Q37 ~ZQ33 NIE 80 7 8 9 11 12 13 PERSONNEL INJURIES NUMBER DESCRIPTION 41 3 ~00 0 Q43 . NA 80 7 8 9 11 12 LOSS OF OR DAMAGE To FACILITY 43 TYPE DESCRIPTION raw ZO 7 8 9 10 NA 80 PUBLICITY NRC USE ONLY ISSUED DESCRIPTION o

~20 ~NQ44 NA 68 69 80 o 4

& 9 10 (

0 T. P.. Bei1man 616-465-5901 NAME OF PREPARER

C ~

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