ML17326A610

LER 80-012/03L-0:on 800305,while Performing Surveillance Test,Steam Generator Water Level low-low Trip Bistable Found to Trip at 11:05% Narrow Range Instrument Span.Cause Unstated.Bistable Recalibr & Returned to Svc

ML17326A610
Person / Time
Site:	Cook
Issue date:	03/25/1980
From:	Rischling J INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17326A609	List: ML17326A608 ML17326A610
References
LER-80-012-03L, LER-80-12-3L, NUDOCS 8004010500
Download: ML17326A610 (2)

Text

<'NRC7FMrNI 366 U. CLEAR REGULATORY COMMISSION (7.77)

LICENSEE EVENT REPORT CONTROL BLOCK: QI (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

I

~0 7 8 9 M I D LICENSEE CODE C C 2Q70 14 15 0 0 0 0 0 0 LICENSE NUMBER 0 0 0 0 25 Q7 26 4 1 LICENSE 1 1 TYPE30 1 Q4~Qq 57 CAT 58 CON'T REPDRT

~01 ~LQB 0 5 0 0 0 3 ~

1 6 7 0 3 0 5 8 0 B 0 3 2 5 8 0 ee 7 8 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES ~10 WHILE PERFORMING A SURVEILLANCE TEST, A STEAM GENERATOR WATER LEVEL-LOW-LOW REACTOR

~03 TRIP BISTABLE WAS FOUND TO TRIP AT A VALUE CORRESPONDING TO 11:05 PERCENT NARROW RANGE INSTRUMENT SPAN. THIS IS NON-CONSERVATIVE IN RESPECT TO T.S. TABLE 2.2-1

~06 ITEM 13 AND TABLE 3.3-1 ITEM 14. THE APPLICABLE ACTION REQUIREMENTS WERE FULFILLED

~06 PREVIOUS OCCURRENCES INCLUDE 50-315/79-50,78-52 AND 050-316/79-7.

~07

~08 7 8 80 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE 7 8

~IA 9 10 Q77 ~E 11 Q77 ~E 12 Q73 13 I N S T R 0 18 Q74 ~S 19 Q7s ~Z 20 Q78 SEQUENTIAL OCCURRENCE REPORT REVISION Q77 LERIRO RE7oa7 ACTION FUTURE EVENT YEAR

~80 21

'FFECT 22

~

23 SHUTDOWN

~01 2:

24 REPORT NO, 26

~W 27

~03 28 ATTACHMENT CODE 29 NPRD 4

~L, TYPE 30 PRIME COMP.

31 NO.

0 COMPONENT TAKEN ACTIQN 33 Q1B ~

34 QIB ON PLANT

~Q20 35 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Q27 METHOD

~Q2 36 37 HOURS Q22 40

~

SUBMITTED 41 Q23 FORM SUB.

~YQ24 42 SUPPLIER PJ 43

~

Q26 44 MANUFACTURER F 1 8 0 47 Q26 o THE BISTABLE WAS RECALIBRATEO AND RETURNED TO SERVICE. INVESTIGATION ALSO INCLUDED A REVIEW OF PREVIOUS SURVEILLANCE DATA, WHICH INDICATED THAT THIS BISTABLE HAD PREVIOUSLY ORIFTFD. AS A PRECAUTIONARY MEASURE THE BISTABLE, MANUFACTURED BY 3

FOXBORO-MODEL NUMBER 63-U-BC-OHEA-F, WAS REPLACED. THE NEW BISTABLE WAS CALIBRATED, TESTED WITH THE APPROPRIATE SURVEILLANCE TEST PROCEDURE, AND RETURNED TO SERIVICE.

4

~Q 7 8 9 80 FACILITY METHOD OF STATUS tePOWER OTHER STATUS Q30 DISCOVERY DISCOVERY DESCRIPTION Q32 Cg LJQ 7

6 8 9 E 26 ACTIVITY CONTENT 10 1 0 0 12 29 13 NA 44

~BQ31 45 46 SURVEILLANCE TEST 80

~ls RELEASED OF RELEASE

~Z AMOUNT OF ACTIVITY NA Q NA LOCATION OF RELEASE Q Q33 ~ZQ34 7 8 9 10 44 45 80 PERSONNEL EXPOSURES

'77 ~0 "0 NUMBER 0

TYPE

~ZQ38 DESCRIPTION Q39 NA 7 8 9 11 Q37 PERSONNEL INJURIES

'2 13 80 '

8 9 11 12 80 LOSS OF OR DAMAGE TO FACILITY TYPE DESCRIPTION Q43 Z Q42 7 8 9 10 80 o

ISSUED

~NO PUBLICITY DESCRIPTION ~ NA NRC USE ONLY aN P~

7 68 69 9

8OO4 p>>

7 8 10 80 o

~ ~ P 0

NAME OF PREPARER

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