ML17317A826

LER#78-093/03L-0 on 781125:rod Position Indication(Rpi)For Control Rod H-8 Exceeded 12 Step Limit.Caused by H-8 Drift

ML17317A826
Person / Time
Site:	Cook
Issue date:	12/20/1978
From:	Rischling J INDIANA MICHIGAN POWER CO.
To:
Shared Package
ML17317A823	List: ML17317A822 ML17317A824 ML17317A825 ML17317A826 ML17317A827 ML17317A828 ML17317A829 ML17317A830 ML17317A831
References
LER-78-093-03L, LER-78-93-3L, NUDOCS 7812270264
Download: ML17317A826 (2)

Text

NRC FORM 366 U. S. NUClEAR REGULATORY COMMISSION (7.77)

LICENSEE EVENT REPORT CONTROL BLOCK:" I Q1 tPLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

~o1 7 8 9 M I D LICENSEE CODE C C 2Q2 14 15 0 0 0 6

0 0 0 0 LICENSE NUMBER 0 P P 25 Q3 26 LICENSE TYPE 30 O~O57 CAT 58 7

CON'T 8

SOURCE LgQB 0 60 61 5 0 0 0>>

DOCKET NUMBER 6

68 Q7 69 EVENT DATE 74 Qs 1 75 2 2 0 REPORT DATE 7 8 80 QB EVENT DESCRIPTION AND PROBABlE CONSEQUENCES Q10 WHILE INCREASING POWER ON 'OVEMBER 25 AND 26 ROD POSITION INDICATION RPI FOR CONTEGL ROD H- 8 EXCEEDED %HE 1 2 STEP LIMIT OF T . S ~ 3 ~ 1 . 3 ~ 2 ON 'I%0 OCCAS ONS I ON BOTH OCCASIONS THE APPLICABLE ACTION REQUIREMENTS WERE FULFILLED. PREVIOUS OCCURRENCES INCLUDE: EO 050 315/76 13 '4 g 54 g 77 27 E 28 4 33 34 @

'8 04 07 38 46 ~

o 6 BQ-050 316/78 07i08i22i3li4li64 75 84 ~

~OS 80 7 8 9

~ SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE 9

~IE 10 Ql> E Qn ~z

'12 Qn 13 x N 6 T R 0 04 18

~x 19 0>> z 20 Qn 7 8 11 SEQUENTIAL OCCURRENCE REPORT REVISION LE U ~o>>

EVENT YEAR REPORT NO. CODE TYPE NO.

Q17 LER/RO REPORT 21 22 23 24 26 U~

27 M~

28 29 UL 30 31 32 ACTION FUTURE EFFECT SHUTDOWN ATTACHMENT NPRDQ PRIME COMP. COMPONENT TAKEN ACTION ON PLANT METHOD HOURS Q22 SUBMITTED FORM SUB. SUPPLIER MANUFACTURER 33 018 ~~0~~

34

~~Q20 35

~~Q2 36 LO 37 0 0 0 40 41 N Qn ~NQ>4 42 IJLIQ25 43 44 47 S

CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Q27 INVESTIGATION HEVFMZD EHAT 1HE SIGNAL CONDITIONING NODULE HAD DRIFZED POR H-8.

AFZER VERIFYING THE POSITION OF EGD H-8 BY MEASURING THE Em'S SECONDAHY COIL VOLTAGE CZ3 /

THE SIGNAL CCNDITXONING NODULE WAS AMUSTED FOR KSE PROPER OUTPUT AND RPI POR H-8 WAS RETURNED TO SERVICE INDICATING THE CORRECT EGD POSITION. AN ENGINEERING REVIEW 4

IS IN -PKGHESS TO DETERMINE THE ROOT CAUSE OF THXS EKCUEPZNG PROBLEM.

80 7 8 9 FACILITY STATUS  % POWER OTHERSTATUS ~

~3P METHOD OF DISCOVERY DISCOVERY DESCRIPTION Q32 CE38 1 6 ~C Q28 ~06 10 6

12 Q29 13 NA 44

~Q3>

45 OPEROOOR OESERVATXON 46 80 7 9 ACTIVITY CONTENT RELEASED OF RElEASE AMOUNTOF ACTIVITY LOCATION OF RELEASE Q EZ 7 8 L~JQ 9

Lies 10 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION Q39 7 8

~00 9

0 11 Q~~ ~ZQ><

12 13 80 PERSONNEL INJURIES NUMBER DESCRIPTION 41 7

a 8

~00 9

o 11 Q40 12 NA 80 LOSS OF OR DAMAGE,TO FACILITY DESCRIPTION Q43 TYPE Z Q42 NA 8 9 10 80 7

p PUBLICITY ISSUED

~Q44 DESCRIPTION ~ NRC USE ONLY C4 a

10 68 69 80 a 7 8 9 0

NAME OF PREPARER L. PHONE: L 0

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