ML17317A930

LER 79-001/03L-0 on 790122:during Mode 1,position of Rod F-6 Showed Deviation of Greater than 12 Steps from Demand Position.Caused by Drift in Signal Conditioning Module

ML17317A930
Person / Time
Site:	Cook
Issue date:	02/09/1979
From:	Beilman T INDIANA MICHIGAN POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17317A928	List: ML17317A927 ML17317A930
References
LER-79-001-03L-01, LER-79-1-3L-1, NUDOCS 7902130164
Download: ML17317A930 (2)

Text

NRC FORM 366 U. S. NUCLEAR REGULATORY COMMISSION (777)

LICENSEE EVENT REPORT CONTROL BLOCK: Q1 (PLEASE PRINT DR TYPE ALI. REQUIRED INFORMATION) 1 6

~o) 7 8 9 N I 0 LICENSEE CODE 0 0 I 14 QE 15 0 0 0 0 0 0 LICENSE NUMBER 0 0 0 0 0 25 Qg 26 4 I I LICENSE TYPE I I 30 04~02 57 CAT 58 KO'JLQB 7

CON'T 8 60 61 o 5 o o o DOCKET NUMBER 68 07 69 o

EVENT DATE 2 7 9 74 Qs o 75 2

REPORT DATE 80 QB EVENT DESCRIPTION AND PROBABLE CONSEQUENCES QIO WHILE IN MODE I THE INDICATED POSITION OF ROD F-6 INDICATED A

~O3 DEVIATION OF GREATER THAN TWELVE STEPS FROM DEMAND POSITION. THIS IS IN EXCESS OF THE LIMIT IMPOSED BY 'T.S. 3.I.3.2. SIMILAR OCCURRENCES

~os OF THIS TYPE PREVIOUSLY SUBMITTED ARE: 050-03I5/76-13, 44 AND 54;

~OB 03I5/77-27A28,33 AND 34; 03I5/78-04-.07,38,40,46, AND 050-03I6/78-07,

~O7 08,22p31,4I,48,64,75,84, AND 93.

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

~IE QTT E Q12 ~2Q73 12 13 I N E T R u 18 04 ~QTE 19

~Z 20 QTR 7 8 9 10 11 SEQUENTIAL OCCURRENCE REPORT REVISION REPORT NO. CODE TYPE NO.

U LF R]RP EVENT YEAR 017 REPoRT LU~

21 22 23 L0001J26 24 27 28 29 30 31 32 ACTION FUTURE EFFECT SHUTDOWN ATTACHMENT NPRDJI PRIME COMP. COMPONENT TAKEN ACTION ON PLANT METHOD HOURS +22 SUBMITTED FORM SUB. SUPPLIER MANUFACTURER 0 0 0 0 N 2 0 072 ~072 ~022 ~027 Q22 ~NQg4 ~NQEE W I Q24 33 34 35 36 3/ 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Q27

~1 o THE CAUSE WAS TRACED TO THE SIGNAL CONDITIONING MODULE WHICH HAD DRIFTED LOW. THE MODULE WAS RESPANNED AND THE INDICATED POSITION OF THE ROD RETURNED TO 'WITHIN SPECIFICATIONS. THE ROOT CAUSE OF THIS PROBLEM HAS NOT YET BEEN DETERMINED ALTHOUGH AN ENGINEERING 3

4 REVIEW IS IN PROGRESS.

80 7 8 9 FACILITY S TATUS E

Qgg ~IO

% POWER 0 Qgg NA OTHERSTATUS 03P METHOD OF DISCOVERY

~AQET OPERATIONAL EVENT DISCOVERY DESCRIPTION Q32 7 8 9 10 12 13 44 45 46 80 ACTIVITY CONTENT RELEASED OF RELEASE AMOUNT OF ACTIVITY Q NA LOCATION OF RELEASE Q36 7 8 9 Z

Q 10 Z

Q NA 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION

~00 0 QET Z Qg NA 7 8 9 11 12 13 80 PERSONNEL INJURIES 7 8 9 11 12 80 LOSS OF OR DAMAGE.TO FACILITY 43 TYPE DESCRIPTION Z NA Q4, 8 9 10 80 PUBLICITY NRC USE ONLY Eg a

9 10 68 69 80 o 7 8 0

T. P. ~ B 'e'I iman PHPNF, 6 I 6-465-590 I NAME OF PREPARER

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