ML20009B535

LER 81-017/03L-0:on 810515,discovered That High Pressure Reactor Trip Setpoints for Pressure Transmitters Were Higher than Tech Spec.Caused by Setpoint Drift.Instruments Recalibr

ML20009B535
Person / Time
Site:	Kewaunee
Issue date:	06/12/1981
From:	Molzahn D WISCONSIN PUBLIC SERVICE CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20009B532	List: ML20009B531 ML20009B533 ML20009B535 ML20009B538
References
LER-81-017-03L, LER-81-17-3L, NUDOCS 8107160242
Download: ML20009B535 (1)

Text

NRC FORM 366 U. S. NUCLEAR REGULATORY COMMISSION 3 (7-77) '

- LICENSEE EVENT REPORT CONTROL BLOCK: l l l  ! l l l (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6 lo lil8 lw 7 9 II IK IN lP l 1 l@l 0 l0 l- l 0 l0 LICENSEE CODE 14 15 l 0 l 0 l n l- ln l n LICENSE NUMBEH 26 l@l26 ALICENSE l1 l1TYPEIll1l@l JO l

5 7 C A T 58 l@

CON'T I lil 7 8 S$RC[ 60 l Ll@l015 61 l0 10 10 l3 l0 15 DOCKET NUMBER 68 l@l0 69 15 11 16 l8 11 75l@l016l1l5l8 EVENT DATE 74 REPORT DATE l180l@

EVENT DESCRIPTION AND PROBABLE CONSECUENCES h I o l 2 l lDuring the performance of surveillance testing it was discovered that two l 10131 lpressurizer pressure transmitters had drif ted, causing the high pressurc l o 4 Ireactor trip setpoint for those transmitters to be 1 psig and 5.6 psig l l o I s l labove Tech. Spec. limits respectively. The remaining channel was l 0 6 lwithin Tech. Spec. limits. If required the high pressure reactor trip l 10 l 7 l lwould not have occurred within the limits of Technical Specification l l a Ia l lTS 2.3.a.2.A. 80 l

7 8 9 C DE CODE S BCO E COWONENT CODE SUB DE SU E 1019l lI l A l@ y@ y@ lIl Nl Sl Tl Rl Ul@ W@ W @

SEQUENTI AL OCCURRENCE REPORT REVISION LE R;RO EVENT YE AR REPOR' NO. CODE TYPE N O.

@ REP g l218l1l

[--j l 0 l 1l7 l y l0l3l lL l 30 l-l l0l

_ 22 23 24 26 27 2d 29 31 32 T K N ACT N O PL s ET O HOURS S B ITT FOR 6U0. SUPPLt R MAN FACTURER l El@[Z_,J@

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41 42 43 l F l 1 l 8 l 0 lg 44 47 CAUSE CSSCRIPTION AND CORRECTIVE ACTIONS h lil0llThe cause of both instruments being out of specification was  ;

i i l determined to be instrument drif;::. Both instruments were l lil7llrecalibrated and brought within specifications. A document review has shown l liI?l lthese instruments to be reliable in the past. No failures were found and no I g Ifurther action is deemed necessary at this time. l 7 8 9 80 STA S  % POWER OTHER STATUS IS U R DISCOVERY DESCRIPTION L'_lf_I W@ l 0101 Ol@l NA l W @l Surveillance Testing l j ACTIVITY CO TENT l RELEASED OF RELE ASE AMOUP.T GF ACTIVITY LOCATION OF RELEASE

! l.,1_} 6 l d @ W@l NA l l NA l

! 7 8 9 10 11 44 45 80 j PERSONNEL EXPOSURES NOV8ER TYPE DESCRIPTION y l0l0l0l@[ZJ@l _

NA l l PERSON NE L INJUI IES I NUMBER DESCRIPTION 1 s l l 7 8 9 l 0 l 0 l 0 l@l12NA 11 80 LOSS OF OR DAMAGE TO FACILtTV TYPE DESCRIPTION 1 9 W@l NA 8 l

PustiETY 8107160242 010612 NRC USE ONLY PDR ADOCK 05000305 ,

7 2 o 8 9 ISSUE (E l u, to "

[@ DESCRIPTION h s PDR g 68 69 lll;;;ggg;;;ly 80 5 D. J. Molzahn SW !b gHONE: (414) 388-2560 0 N AME OF PREPARER ",

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