05000287/LER-1982-002, Forwards LER 82-002/03L-0.Detailed Event Analysis Encl

Forwards LER 82-002/03L-0.Detailed Event Analysis Encl

ML20050B010
Person / Time
Site:	Oconee
Issue date:	03/12/1982
From:	Parker W DUKE POWER CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20050B011	List: 05000287/LER-1982-002, Forwards LER 82-002/03L-0.Detailed Event Analysis Encl 05000287/LER-1982-002-03, /03L-0:on 820210,reactor Protection Sys Channel B Hot Leg Temp Readings Were Lower than Those of Channels A,C & D.Caused by Failure of Liner Bridge in Input Circuitry for Channel B Indication.Bridge Replaced
References
NUDOCS 8204020496
Download: ML20050B010 (2)

LER-1982-002, Forwards LER 82-002/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
2871982002R00 - NRC Website

text

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DlIKE POWER COMPANY POWEN UUILDING

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422 south Cucucu SinEET, CIIAHIDTTE, N. G ana42

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O wlLLI AM O. PA R M E R, J R.

Vier Potsiorne Tettenonc: Anta 704 s i r.- e.oo.,cv,on March 12, 1982 v a-40s3 9

/N Mr. James P. O'Reilly, Regional Administrator p

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U. S. Nuclear Regulatory Connission Region II "UC, n

101 Marietta Street, Suite 3100 4p

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Atlanta, Georgia 30303 2

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g-Re: Oconee Nuclear Station j

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Docket No. 50-287

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Dear Mr. S'Reilly:

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s Please find attached Reportable Occurrence Report R0-287/82-02. This report is submitted pursuant to Oconee Nuclear Station Technical Specification

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6.6.2.1.b(1) which concerns reactor protection system settings which are found to be less conservative than those established by the Technical Spec-ifications but which do not prevent the fulfillment of the functional requirements of the affected systems. This report describes an incident which is considered to be of no significance with respect to its effect on the health and safety of the public.

Ve truly yours, I

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d. e William O. Parker, J i.

JFK/php Attachment i

cc: Director Records Center Office of Management & Program Analysis Institute of Nuclear Power Operations U. S. Nuclear Regulatory Commission 1820 Water Place Washington, D. C. 20555 Atlanta, Georgia 30339

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Mr. W. T. Orders NRC Resident Inspector Oconee Nuclear Station i

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l OFFICI AL COPY, b' ' b 9

82040204 % 820312 PDR ADOCK 05000287 f

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DUKE POWER COMPANY OCONEE NUCLEAR STATION UNIT 3

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Report Number: R0-287/82-02 I

3eport Date: March 12, 1982 Occurrence Date: February 10, 1982 j

Facility: Oconee Nuclear Station Unit 3, Seneca, South Carolina i

Identift ation of Occurrence: RPS Channel 'B' Hot Leg Temperature Instrument inoperable Conditions Prior to Occurrence:

100% FP Description of Occurrence:

On February 10, 1982, the RPS Channel 'B' Hot Leg Temperature indication was declared inoperable due to readings i

i that were lower than Channels

'A',

'C', and

'D'.

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Apparent Cause of Occurrence: The apparent cause of this occurrence was the failure of a Linear Bridge in the input circuitry for the RPS Channel

'B' indication.

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Analysis of Occurrence: Channels

'A',

'C', and 'D' of the RPS Hot Leg Temperature indication were operational, and the Channel 'B' indicator i

was placed in the TRIP / BYPASS condition during this incident. Thus, the 4

l health and safety of the public were not affected by the incident-

Corrective Action

Channel

'B' of the RPS Hot Leg Temperature indication j

was placed in the TRIP / BYPASS condition. The Linear Bridge was replaced j

and the Channel 'B' indication was calibrated and returned to service.

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