ML20004D746

LER 81-022/03L-0:on 810507,during Refueling,Relay 14A-K19B Found to Exceed Tech Spec Table 3.2.B Requirement for Operation of 6 to 8-s.Caused by Time Delay Relay Out of Calibr.Time Delay Relay Adjusted

ML20004D746
Person / Time
Site:	Browns Ferry
Issue date:	06/03/1981
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20004D726	List: ML20004D725 ML20004D746
References
LER-81-022-03L-02, LER-81-22-3L-2, NUDOCS 8106090719
Download: ML20004D746 (2)

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[,y l During refueling, while performing core spray timer calibration (SI 4.2.B-39D) .

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,g i relay 14A-K19B was found to operate in 8.04 seconds, exceeding T.S. table 3.2.B There was no danger to the health or safety of the i g g ; requirement of 6 to 8 seconds.

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Tennessee Valley Authority Form BF-17

. Browns Ferry Nuclear Plant BF 15.2 3/24/81 LER SUPPLEMENTAL INFORMATION BFRO-50 ___259 / 81022 Technical Specification Involved Table 3.2.8 Reported Under Technical Specification 6.7.2.b(2)

Date of Occurrence 5/7/81 Time of Occurrence 000 Unit 1 Identification and Pescription of Occurrence:

Core spray auto-sequencing timer 14A-Kl9B was found to operate in 8.04 seconds during SI 4.2.B-39D. T.S. Table 3.2.B requires between 6 and 8 seconds.

Conditions Prior to Occurrence:

Unit I refueling outage Unit 2 at 40%

Unit 3 at 60%

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

Met requirements of T.S. Table 3.2.B.

Agrent Cause of Occurrence:

Time delay relay out of calibration.

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A_nalysis of Occurrence:

There was no danger to the health or safety of the public, no release of activity, no damage to the plant or equipment, and no resulting significant chain of events.

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Corrective Action:

l Relay was adjusted, tested, and returned to service. Relays are scheduled to be replaced by Agastat timers on P0109. Units 2 and 3 have had relays replaced.

l Failure Data:

None l .-.

.

• Retention : Period - Lifetime; Responsibility - Document Control Supervisor

• Revision:

. _ . .