05000259/LER-1980-051-03, /03L-0:on 800626,scram Discharge Vol High Water Level Switch LS-84-45A Failed.Caused by Float Lodged in SL-305-E3-X Level Switches.Float Chamber Flushed

/03L-0:on 800626,scram Discharge Vol High Water Level Switch LS-84-45A Failed.Caused by Float Lodged in SL-305-E3-X Level Switches.Float Chamber Flushed

ML19326D877
Person / Time
Site:	Browns Ferry
Issue date:	07/18/1980
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19326D876	List: 05000259/LER-1980-051-03, /03L-0:on 800626,scram Discharge Vol High Water Level Switch LS-84-45A Failed.Caused by Float Lodged in SL-305-E3-X Level Switches.Float Chamber Flushed
References
LER-80-051-03L, LER-80-51-3L, NUDOCS 8007230491
Download: ML19326D877 (2)

LER-1980-051, /03L-0:on 800626,scram Discharge Vol High Water Level Switch LS-84-45A Failed.Caused by Float Lodged in SL-305-E3-X Level Switches.Float Chamber Flushed

Event date:
Report date:
2591980051R03 - NRC Website

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n,7l lDuring normal operation while performing S.I. 4.1.A-8, scram discharge volume high j

water level switch LS-84-45A f ailed to' operate at the prescribed setpoints(T.S. 3.1. A)..

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3G J1 43 41 42 43 da CAUSE DESCRIPflON t.40 CC5mECftVE ACTIONS h l i g g lThe float was stuck in the Model. SL-305-E3-X level switches.

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i gij 11ushed.the switch inspected, and functionally tested for repeatability.

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LER SUPPLEMENTAL INFORMATION 1

BFRO 259 / 8051 Technical Specification Involved Table 3.1.'A Reported Under Technical Specification

6. 7. 2. b (2) e*

Dnte of Occurrence 6/26/80 Time of Occurrence 1030 Unit _ l Identification and Description'of Occurrence:

LS-85-45A,, scram discharge volume high water level switch failed to operate at the r-prescribed setpoint during the performance of SI 4.1. A-8.

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- Conditions ~ Prior to Occurrence:

Unit 1 at 70% We Unit 2 ac 90% We Unit 3 at 99% We s

Actna specified in the Technical Specific.ation Surveillance Requirements m.

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Describe.

N/A problem corrected with flushing.

Apparent Cause of Oc:currenec:

Float was stuck on switch.

Analysis of Occurrence:

There was no damage to plant equipment.

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

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Corrective Action

The float chaw eT was flushed, the switch inspected,and functionally tested for repeatability.

Recurrence control will consist of more f requent testing of the switches.

Procedures will also be revised to flush switches during unit outages but not more frequently than monthly.

F,uil re Datt 3

None

• Retyntion:

Perimi - Lifetime; Responsibility - Administrative Supervism

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