ML17331A531

LER 80-037/03L-0:on 801207,transmitter NPP-153 Found to Have Excessive Nonconservative Drift Causing Pressurizer Pressure High Reactor Trip Bistable Setpoint to Exceed Tech Spec Limits.Caused by Setpoint Drift.Transmitter Recalibr

ML17331A531
Person / Time
Site:	Cook
Issue date:	01/06/1981
From:	Rischling J INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17326A816	List: ML17326A815 ML17331A531
References
LER-80-037-03L, LER-80-37-3L, NUDOCS 8101090692
Download: ML17331A531 (4)

Text

NRC FORM 366 U. S. NUCLEAR REGULATORY COMMISSION

{7.77)

LICENSEE EVE NT REPORT CON OL BLOCK: Qi (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) o 1

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8 9

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M 7RP I D J,

LICENSEE CODE I

14 15 6

LICENSE NUMBER 25 Q3 26 LICENSE TYPE 30 Q~0 57 CAT 58 CON'T QB 0 1 0 6 8 1 Qg SOURCE MLQB 07 68 69 EVENT DATE 74 75 REPORT DATE 80 7 8 60 61 DOCKET NUMBER EVENT DESCRIPTION AND PROBABLE CONSEQUENCES Q10

~02 DURING LOW POWER OPERATION A 20 PS IG DIFF

~03 CHANNELS EXISTED ~ TRANSMITTER NPP-153 WAS FOUND TO HAVE EXCESS I E 4 CONSERVATIVE DIRECTION CAUSING THE CORRESPONDING PRESSURI ER TRI'P BISTABLE SETPOINT TO EXCE ED THE LCO LIMIT BY 4 32 PSIG T'. S ~ TABLE 2 ~ 2-

~o6 . 10 THE APPROPRIATE ACTION RE UIREMENT OF T S. T B

~o7 OCCURRENCES INCLUDE: 050-315 79-42.

1

~OB 80 7 8 9 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE zz ~IA Q>> ~EQ12 ~EQ13 I N S T R U Q4 ~TQ15 ~Z QB LU'l 8 9 10 12 13 18 19 20 7

SEQUENTIA L OCCURRENCE REPORT REVISION Q17 LERIRP REPORT ACTION FUTURE EVENT YEAR

~80 21 22 EFFECT

~ LLLI 23 SHUTDOWN 24 REPORT NO.

0 3 7 26 3

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27 28 ATTACHMENT CODE 29 NPRDQ TYPE 30 PRIME COMP.

31 +0'OMPONENT HOURS Q22 SUBMITTED FORM SUB. SUPPLIER MANUFACTURER ON PLANT

~Q TAKEN ACTION METHOD

~EQ18 ~ZQig 33 34

~ZQ20 35

~ZQ21 36 37 40

~~Q 41 42 IJLI 43 44 47 Q26 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Q27 o T E P NPP- ND NPS-15 WERE FOUND TO HAVE DRIFTED EXCESSIVELY. ONLY TRANSMITTER NPP-15

~12 BARTON-MODEL NO ~ 763 DRIFTED EXCESSIVELY IN A NON-CONSERVATIVE DIRECTION SUCH THAT 3 THE REACTOR TRIP BISTABLE TRIP SETPOINT WOULD EXCEED THE LCO VALUE. SINCE RECALI-4 BRATING THESE TRANSMITTERS THE PRESSURIZER PRESSURE INDICATION SEE ATTACHED PAGE

~O 80 7 8 9 FACILITY METHOD OF STATUS POWER OTHER STATUS QSO DISCOVERY DISCOVERY DESCRIPTION Q32 uO R%%d CO 7

1 5 8 9 X 28 10 0 0 6 12 29 13 NA 44

~BQ31 45 46 OPERATOR OBSERVATION 80 ACTIVITY CONTENT RELEASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF REI.EASE 7 8 9 Z Q33 10 Z

Q NA 44 45 NA 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION Q3g 7

8

~00 0 OTL~lQRR 11 12 13 80 7 9 PERSONNEI INJURIES NUMBER DESCRIPTION 41 3 ~OO O QER NA 80 7 8 9 11 12 LOSS OF OR DAMAGE TO FACILITY 43 TYPE DESCRIPTION Z Q42 NA Sto co 8 10 80 9

O ISSUED PUBLICITY L~JO 10 DESCRIPTION ~NA NRC USF. ONLY 68 69 80. g 7 8 9

,0 NAME OF PREPARER JaCk L. Ri SChl in (616) 465-5901

1 ~ '

ATTACHMENT TO LER 0'0-037/03~-0 SUPPLEMENT TO CAUSE DESCRIPTION HAS BEEN CHECKED PERIODICALLY TO ENSURE NO ADDITIONAL INSTRUMENT DRIFT PROBLEMS HAVE OCCURRED. NO FURTHER ACTION IS REQUIRED AS A RESULT OF THIS EVENT.

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