ML20028A037

LER 82-008/03L-0:on 821006,low Steam Line Pressure Setting for Pressure Instrument 2PT-478 Found Lower than Allowed by Tech Specs.Caused by Bumping of Setpoint Adjustment Knob.Instrument Tested & Realigned

ML20028A037
Person / Time
Site:	Point Beach
Issue date:	11/05/1982
From:	Fay C WISCONSIN ELECTRIC POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20028A028	List: ML20028A027 ML20028A037
References
LER-82-008-03L-01, LER-82-8-3L-1, NUDOCS 8211160295
Download: ML20028A037 (2)

Text

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LICENSEE EVENT REPORT a,

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7 8 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h 10121 ion 10/06/82, during normal operation, periodic testing per ICP 2.1 found l O a I the low steam line pressure setting for pressure instrument 2PT-478 loweq O 4 lthan allowed by Technical Specification Table 15.3.5-1, 2PT-478 is one l p; g1 gof three pressure instruments for the "B" steam generator which make up l O s la two out of three logic for initiating a SI signal on low steam line l l 0 l 7 ] l pressure. The other two instruments were found to be operable. This l l O la l l event is reportable IAW Technical Specification t.15. 6. 9. 2.B. l. l 80 7 8 9 DE CODE SUBCO E COMPONENT CODE SUBCOdE SU E y lIlB l@ l Xl@ W@ lIlN lS lT lR lU l@ g@ W @

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3 l0l0l0l 31 40 l g g ] g ] g 41 42 43 lFl1l8l0lg 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h g lThe cause of the out-of-specification setpoint is attributed to bumping l

[ijillof the setpoint adjustment knob during installation of a thumbscrew l

, 7 l securing the module to the instrument rack. The pressure instrument wasl 3 3 l tested satisfactorily, realigned and returned to service on October 6, l g l1982. 80 l

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a, ATTACHMENT TO LICENSEE EVENT REPORT NO. 82-008/03L-0 Wisconsin Electric Power Company Point Beach Nuclear Plant Unit 2 Docket No. 50-301 During normal operation on October 6, 1982, periodic testing (per the requirements of Technical Specification 15.4.5, plant procedure ICP 2.1) of the Unit 2 reactor protection and safeguards analog systems revealed the low steam line pressure setpoint for pressure instrument 2PT-478 lower than allowed by Technical Specification. Table 15.3.5-1. The setpoint was found at 416.5 psig, approximately 85 psig lower than the setpoint

-requirement of >500 psig. 2PT-478 was one of three pressure instruments for the "B" steam generator which make up a two-of-three logic for initiating a safety injection signal on low steam line pressure.

The event had no effect on the public health and safety as the two other channels were fully operational. 2PT-478 would still have initiated the required signal, but at a lower pressure than specified.

After the previous ICP'2.1 testing (September 8, 1982) the pressure instrument module was secured to the instrument rack with a thumb screw. It is believed that during this installation, tne setpoint adjustment knob was bumpad causing the setpoint misalignment.

The pressure instrument was tested satisfactorily, realigned, and returned to service on October 6, 1982.

This event has been discussed with the instrument technicians to emphasize the importance of using extreme care while working around sensitive equipment. Increased technician awareness should prevent occurrences of this type in the future.

The event is being reported as required by Technical Specification 15.6.9.2.B.1.

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