ML17317A829

LER#78-096/03L-0 on 781209:during Rapid Load Reduction from 100% to 88%,axial Flux Difference Went Outside Target Band. Air Leak on a Condenser Vacuum Breaker Caused Increase in Back Pressure on Main Condenser

ML17317A829
Person / Time
Site:	Cook
Issue date:	12/20/1978
From:	INDIANA MICHIGAN POWER CO.
To:
Shared Package
ML17317A823	List: ML17317A822 ML17317A824 ML17317A825 ML17317A826 ML17317A827 ML17317A828 ML17317A829 ML17317A830 ML17317A831
References
LER-78-096-03L, LER-78-96-3L, NUDOCS 7812270277
Download: ML17317A829 (2)

Text

NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION I7-77)

LICENSEE EVENT REPORT CONTROL BLOCK: Qi {PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

Q~Q 1 6

[0D1] M I D C C 2 Q2 0 0 0 0 0 0 0 0 03 7 8 9 LICENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE 30 57 CAT 58 COW T 7

1 8

soI'JR(f ~LO0 60 61 5 0 0 0 DOCKETNUMBER 3 1 6 68 0 69 1

2 0 EVENT DATE 9 7 8QB 74 75

l. 2 2 REPORT DATE 80 QB EVENT DESCRIPTION AND PROBABLE CONSFQUENCE6 Q10

~o2 DURING A RAPID LOAD REDUCTION FROM lOOX to 88

~O3 OUTSIDE THE TARGET BAND. THE AXIAL FLUX DIFF R TARGET BAND IN 10 MINUTES IN C MP I

~OS TECH. SPEC. 3.2.1. SINCE THE TIME OUTSIDE THE TARG T B 4

~OB FACTORS WERE NOT S RETURN TO RATED T

~os 80 7 8 SYSTEM CAUSE CAUSE COMP. VALVE.

CODE CODE SUBCODE COMPONENTCODE SUBCODE SUBCODE

~Os 7 8

~zz 9 10 Q>>

11 x Q>> LgJQ>>

12 13 18 Q4 LZJQ>>

19 LZJQEE 20 SEQUENTIAL OCCURRENCE REPORT REVISION Q17 LERIRP REPQRT ACTION FUTURE

~ EVENT YEAR

~70 21 22 EFFECT

~

23 SHUTDOWN

~09 24 REPORT NO.

6 26 Q~

27 QQ 28 ATTACHMENT CODE 29 NPRDQ TYPE

~L 30 PRIMECOMP.

Q 31 NO.

Qo 32 COMPONENT TAKEN ACTION ONPI.ANT - METHOD HOURS Q22 SUBMITTED FORM SUB. SUPPLIER MANUFACTURER

~QTR~ZQTR ~SQER ~ZQ>> O. O O O N Q22 ~<Q4 ~iQEE Z 0 0 0 QEE 33 34 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Q27 o AN AIR LEAK ON "A" CONDENSER VACUUM BREAKER D THE MAIN CONDENSER. LOAD WAS REDUCED WITH RODS AND F D MAIN STEAM. BORATION AND CONTROL WITHDRAWAL RESTORED AXIAL FLUX WITHIN LIMITS I 3 10 MINUTES. NO OTHER CORRECTIVE ACTION PLANNED.

7 8 9 80 FACILITY STATUS  % POWER OTHERSTATUS Q 'AQRT

~3P ~

METHOD OF DISCOVERY DISCOVERY DESCRIPTION Q32

~TE ~FQER ~IO 10 0 QE NA 44 45 OPERATOR OBSERVATION 80 7 8 9 12 13 46 6

ACTIVITY Z Q33 CONTENT RELEASED OF RELEASE Z Q34

~

AMOUNT OF ACTIVITY NA

~ NA LOCATION OF RELEASE Q 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES EKI ~OQ NUMBER TYPE DESCRIPTION Q39 z QEE NA 7 8 9 11 12 13 80 PERSONNEL INJURIES NUMBER DESCRIPTION 4i 7 8

~00 9

OQ42 11 12 80 LOSS OF OR DAMAGE TO FACILITY 43 TYPE DESCRIPTION 9 Z Q42 NA 7 8 9 10 80 O

ISSUED PUBLICITY LJNQ44 DESCRIPTION NA

~ NRC USE ONLY 4

7 8 9 10 68 69 80 g 0

NAMEoFPREPARER J. A. Steinbauer (6" 6) 464-4901

~ h n