05000260/LER-1980-020-03, /03L-0:on 800421,high Pressure Switch PS-3-22D Found Exceeding Setpoint During Normal Operation.Caused by Setpoint Drift.Barksdale BST-A12SS Switch Inspected,Calibr & Functionally Tested

/03L-0:on 800421,high Pressure Switch PS-3-22D Found Exceeding Setpoint During Normal Operation.Caused by Setpoint Drift.Barksdale BST-A12SS Switch Inspected,Calibr & Functionally Tested

ML18025A891
Person / Time
Site:	Browns Ferry
Issue date:	05/20/1980
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18025A890	List: 05000260/LER-1980-020, Forwards LER 80-020/03L-0 05000260/LER-1980-020-03, /03L-0:on 800421,high Pressure Switch PS-3-22D Found Exceeding Setpoint During Normal Operation.Caused by Setpoint Drift.Barksdale BST-A12SS Switch Inspected,Calibr & Functionally Tested
References
LER-80-020-03L-01, LER-80-20-3L-1, NUDOCS 8005280771
Download: ML18025A891 (4)

LER-1980-020, /03L-0:on 800421,high Pressure Switch PS-3-22D Found Exceeding Setpoint During Normal Operation.Caused by Setpoint Drift.Barksdale BST-A12SS Switch Inspected,Calibr & Functionally Tested

Event date:
Report date:
2601980020R03 - NRC Website

text

U. S. NUCLEAR REGULATORY COMMISSION NRC FORM 366 27477)

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(PLEASE PRINT OR TYPE ALLREQUIRED INFORMATION)

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60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 60 EVENT DESCRIPTION AND PRO8ABLE CONSEQUENCES 010 During normal operation reactor hi h-ressure switch PS-'3-22D was found to exceed setpoint during performance of S ~I ~

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channels were operable.

There were no significant resultin events.

There was no danger to health or safety of the public.

Previous occurrences:

BFRO-50-259/73023, 259/73031 and 259/73039

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Cause of event

was setpoint drift.

The switch was inspected, calibrated and functionally tested for repeatabiU.ty.

Barksdale, Model B2T-A12SS pressure switch.

No recurrence control required, due to low occurrence of event.

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.'~ + 'Tennessee Valley Author Srtowns Ferry Nuclear Plant Form BF-37 BP 15. 2 1/10/79 LER SUPPLEMENTAL INFORMATION BFRO-'50-260 / 8020 Technical Specification Involved Reported Under Technical Specification 6

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Date of Occurrence 4/21/80 Time of Occurrence

0835, Unit Identitication and

~Jeac~ri tion'of Occurrenre:

During performance of S.T.. 4.1. A-5 reactor high-pressure switch.PS-3-22D was found to exceed the setpoint.

Conditions Prior to Occurrence:

Unit 1 8 0%

Unit 2 8 95%

Unit 3 8 100%

Action specified in the Technical Specification SurveiHance Requirements met due to ino erable e ui ment.

Describe.

NA Apparent Cause of Occurrence:

Cause,was attributed to setpoint drift.

An~al sis of Occurrence:

There was no damage to plant equipment.

There was no activity release, no personnel exposure or injury,and no danger.to health or safety of the public.

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Corrective Action

The"switch was inspected, calibrated and functionally tested for repeatability.

Failure Data:

BPRO-50-259/73023, 259/73031, and 259/73039

+Retention:

eriod - Lifetime; Responsibility - Administrative Supervisor

~Revision:

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