05000259/LER-1980-046-03, /03L-0:on 800605,during Power Operation,While Performing Surveillance Test,Core Spray Pump Discharge Pressure switch,PS-75-44,exceeded Setpoint.Caused by Instrument Drift.Switch Was Inspected,Calibr & Tested

/03L-0:on 800605,during Power Operation,While Performing Surveillance Test,Core Spray Pump Discharge Pressure switch,PS-75-44,exceeded Setpoint.Caused by Instrument Drift.Switch Was Inspected,Calibr & Tested

ML19320A946
Person / Time
Site:	Browns Ferry
Issue date:	06/27/1980
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19320A942	List: 05000259/LER-1980-046, Forwards LER 80-046/03L-0 05000259/LER-1980-046-03, /03L-0:on 800605,during Power Operation,While Performing Surveillance Test,Core Spray Pump Discharge Pressure switch,PS-75-44,exceeded Setpoint.Caused by Instrument Drift.Switch Was Inspected,Calibr & Tested
References
LER-80-046-03L, LER-80-46-3L, NUDOCS 8007080308
Download: ML19320A946 (2)

LER-1980-046, /03L-0:on 800605,during Power Operation,While Performing Surveillance Test,Core Spray Pump Discharge Pressure switch,PS-75-44,exceeded Setpoint.Caused by Instrument Drift.Switch Was Inspected,Calibr & Tested

Event date:
Report date:
2591980046R03 - NRC Website

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61 00';K E T *.Uwe E n b6 64 EVENT DATE 74 75 REPORT DATE 80 Evr:N f DESCntPTION AND PROH ABLE CONSCOUENCES h g l During normal operation while performing Surveillance Instruction 4.2.B-21, core j

g l spray pump discharge pressure switch PS-75-44 was found to exceed setpoint l contrary to T.S. Table 3.2.B.

There were no significant resulting events. There j

o 4 lols; l was no danger to health or safety of the public. Redundant channels were operable.

j l0lr,; l Previous occur'rence: BFRO-50-259/78003.

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.g ceusE DESCPIPTION AND CQAHECTIVE ACTIONS h l i l o l l Cause of event was instrtr y setpoint drif t.

The Mercoid pressure switch, Model j

ii li l l DA-7004-804, was inspected, recalibrated and functionally tested for repeatability.

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Fcrm BF-17 Drowns Ferry Nuclear Plant BF 15.2 1/10/79 LER SUPPLEMENTAL INFORMATION BFRO-50 259 / 80 46 Technical Specification Involved Reported Under Technical Specification

6. 7. 2.b (2)

Date of Occurrenec 6/5/80 Time of Occurrence 1300 Unit 1

Identification and_ Description'or Occurrence:

While performing Surveillance Instruction 4.2.B-21 core spray pump discharge pressure switch PS-75-44 was found to exceed setpoint.

1 Conditions ' Prior to Occurrence:

Unit 1 0 85%

Unit 2 0 96%

Unit 3 0 100%

Action specified in the Technical Specification Surveillance Requirements met due to inoperable eriuipment.

Describe.

NA Apparent cause of Occurrence:

Cause of event was instrument setpoint drift.

Analysis of Occurrence:

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

Corrective Action

The pressure switch was inspected, recalibrated and functionally tested for s

repeatability.

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Failure Data:

BFRO-50-259/78003

• Retention:

criod - Lifetime; Responsibility - Administrative Supervisor h

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• Revision:

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