05000302/LER-1981-066-03, /03L-0:on 811010,various Reactor Protection Instruments Found Out of Tolerance.Caused by Bellows Failure,Instrument Drift & Loose Test Point Output Terminal. Bellows Replaced,Terminal Tightened & Instruments Recalibr

/03L-0:on 811010,various Reactor Protection Instruments Found Out of Tolerance.Caused by Bellows Failure,Instrument Drift & Loose Test Point Output Terminal. Bellows Replaced,Terminal Tightened & Instruments Recalibr

ML20005C027
Person / Time
Site:	Crystal River
Issue date:	11/06/1981
From:	Hernandez V FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20005C024	List: 05000302/LER-1981-066, Forwards LER 81-066/03L-0 05000302/LER-1981-066-03, /03L-0:on 811010,various Reactor Protection Instruments Found Out of Tolerance.Caused by Bellows Failure,Instrument Drift & Loose Test Point Output Terminal. Bellows Replaced,Terminal Tightened & Instruments Recalibr
References
LER-81-066-03L, LER-81-66-3L, NUDOCS 8111180239
Download: ML20005C027 (2)

LER-1981-066, /03L-0:on 811010,various Reactor Protection Instruments Found Out of Tolerance.Caused by Bellows Failure,Instrument Drift & Loose Test Point Output Terminal. Bellows Replaced,Terminal Tightened & Instruments Recalibr

Event date:
Report date:
3021981066R03 - NRC Website

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,cSCRIPTION AND PROBABLE CONSEQUENCES h l o 121 l During performance of shutdown surveillance activities various reactor rirnrocrinn 1

instruments were found out-of-tolerance. These events were not attributed to a srecific I 3 g 10141 l shutdown activity,as required by Reg. Guide 1.16 and, therefore, are reportable as I

,being contrary to T.S. 3.3.1.1.

There was no effect upon the health or safety of the l

general public. Nine instruments (RC-14A-DPT4 on 10/10/81; RC-14A-DPTl on 10/11/81; I

y RC-14B-DPT4 and RC-14B-DPT1 on 10/13/81; RC-14B-DPT2 on 10/17/81; RC-14B-DPT3 on 10/20/81l RC-3B-PT1 and RC-3B-PT2 on 10/26/81 RC-3A-PTl on 10/27/81) were out-of-tolerance. This 10181 l s the ninth event reported under tfiis Specification.

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- 14A-DPT4 had a bellows failure. The bellows was rep 1' aced.

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was tightened. All instruments were satisfactorily recalibrated. No further corrective l action is deemed necessary.

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SUPPLEMENTARY INFORMATION Report No.:

50-302/81-066/03L-0 Facility:

Crystal River Unit 3 Report Date:

November 6,1981 Occurrence Date:

October 10, 1981 Identification of Occurrence:

Various reactor protection instruments were found o it-of-toler-ance during shutdown surveillance activities. These events were not atttibuted to specific shutdown activities as required by Regulatory Guide 1.16, and, therefore, are being reported as contrary to Technical Specification 3.3.1.1.

Conditions Prior to Occurrence:

Mode 6 refueling (0%).

Description of Occurrence:

On October 10, 1981, during performance of SP-112, Calibration of the Reactor Protection System, RC-14A-DPT4 was found out-of-tolerance. On October 11, 1981, during performance of SP-112, RC-14A-DPT1 was found out-of-tolerance. On October 13, 1981, during performance of SP-112, RC-14B-DPT4 and RC-14B-DPTI were found out-of-tolerance. On October 17, 1981, during performance of SP-112, RC-14B-DPT2 was found out-of-tolerance. On October 20, 1981, during performance of SP-112, RC-14B-DPT3 was found out-of-tolerance. On October 26, 1981, during performance of SP-112, RC-3B-PTl and RC-3B-PT2 were found out-of-tolerance.

On October 27, 198], during performance of SP-ll2, RC-3A-PTl was found out-of-tolerance.

Designation of Apparent Cause:

RC-14A-DPT4 had a bellows failure. The bellows was replaced.

RC-14A-DPT1, RC-14B-DPT4, RC-14B-DPT1,and RC-14B-DPT2, RC-3B-PT1,and RC-3B-PT2,and RC-3A-PT1,all failed due to in-strument drift.

RC-14B-DPT3 had a loose test point output terminal. The terminal was tightened.

Aaalysis of Occurrence:

There was no effect upon the health or safety of the general public.

Corrective Action

All instruments were satisfactorily recalibrated. No further corrective action is deemed necessary.

Failure Data:

Nine instruments were found out-of-tolerance. This is the ninth event reported under this Spe,cification.

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