05000316/LER-1980-037-03, /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

/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: 05000316/LER-1980-037, Forwards LER 80-037/03L-0 05000316/LER-1980-037-03, /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
References
LER-80-037-03L, LER-80-37-3L, NUDOCS 8101090692
Download: ML17331A531 (4)

LER-1980-037, /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

Event date:
Report date:
3161980037R03 - NRC Website

text

U. S. NUCLEAR REGULATORY COMMISSION NT REPORT (PLEASE PRINT OR TYPE ALLREQUIRED INFORMATION)

NRC FORM 366

{7.77) 3 Q~0 25 26 LICENSE TYPE 30 57 CAT 58 Q

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1 0

6 8

1 Qg EVENT DATE 74 75 REPORT DATE 80 LICENSEE EVE CON OL BLOCK:

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9 LICENSEE CODE 14 15 LICENSE NUMBER CON'T SOURCE MLQB 07 7

8 60 61 DOCKET NUMBER 68 69 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 EXCEED THE LCO LIMIT BY 4 32 PSIG T'. S

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TABLE 2 ~ 2-

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. 10 THE APPROPRIATE ACTION RE UIREMENT OF T S.

T B

~o7 OCCURRENCES INCLUDE:

050-315 79-42.

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COMP.

VALVE COMPONENT CODE SUBCODE SUBCODE I

N S

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~TQ15

~Z QB 13 18 19 20 L

OCCURRENCE REPORT 3

CODE TYPE LLLI U~ LU'l 26 27 28 29 30 31 ATTACHMENT NPRDQ PRIME COMP.

HOURS Q22 SUBMITTED FORM SUB.

SUPPLIER

~~Q ~Q IJLI 40 41 42 43 44 SYSTEM

CAUSE

CAUSE CODE CODE SUBCODE

~IA Q>>

~EQ12

~EQ13 7

8 9

10 12 SEQUENTIA LERIRP EVENTYEAR REPORT NO.

Q17 REPORT

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7 21 22 23 24 ACTION FUTURE EFFECT SHUTDOWN TAKEN ACTION ON PLANT METHOD

~EQ18 ~ZQig

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~ZQ21 33 34 35 36 37 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Q27 o

T E

P zz REVISION

+0'OMPONENT MANUFACTURER 47 Q26 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-7 8

9 FACILITY STATUS R%%d POWER OTHER STATUS QSO 1

5 X

28 0

0 6

29 NA 80 METHOD OF DISCOVERY DISCOVERY DESCRIPTION Q32 CO uO ~O

~BQ31 OPERATOR OBSERVATION 7

8 9

10 12 13 44 45 46 ACTIVITY CONTENT RELEASED OF RELEASE AMOUNTOF ACTIVITY LOCATIONOF REI.EASE Z

Q33 Z Q NA 7

8 9

10 44 45 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION Q3g 7 ~00 0 OTL~lQRR 7

8 9

11 12 13 PERSONNEI INJURIES NUMBER DESCRIPTION 41 3

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QER NA 80 NA 80 80 80 7

8 9

11 12 LOSS OF OR DAMAGETO FACILITY 43 TYPE

DESCRIPTION

Z Q42 NA 9

10 PUBLICITY ISSUED DESCRIPTION~

L~JO NA 9

10 Sto co 80 NRC USF. ONLY

80. g

,0 8

O 68 69 7

8 (616) 465-5901 NAME OF PREPARER JaCk L. Ri SChl in 4

BRATING THESE TRANSMITTERS THE PRESSURIZER PRESSURE INDICATION SEE ATTACHED PAGE

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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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