05000260/LER-1981-027-03, /03L-0:on 810604,during Mod Outage,Switch 2-PdIS-75-56 Was Found Outside Tech Spec Limits.Caused by Setpoint Drift of Barton Model 288 D/P Switch.Switch Recalibr

/03L-0:on 810604,during Mod Outage,Switch 2-PdIS-75-56 Was Found Outside Tech Spec Limits.Caused by Setpoint Drift of Barton Model 288 D/P Switch.Switch Recalibr

ML20009G010
Person / Time
Site:	Browns Ferry
Issue date:	07/10/1981
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009G000	List: 05000260/LER-1981-027, Forwards LER 81-027/03L-0 05000260/LER-1981-027-03, /03L-0:on 810604,during Mod Outage,Switch 2-PdIS-75-56 Was Found Outside Tech Spec Limits.Caused by Setpoint Drift of Barton Model 288 D/P Switch.Switch Recalibr
References
LER-81-027-03L-02, LER-81-27-3L-2, NUDOCS 8108030234
Download: ML20009G010 (2)

LER-1981-027, /03L-0:on 810604,during Mod Outage,Switch 2-PdIS-75-56 Was Found Outside Tech Spec Limits.Caused by Setpoint Drift of Barton Model 288 D/P Switch.Switch Recalibr

Event date:
Report date:
2601981027R03 - NRC Website

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la t-J l During a mndification outage, while performing core spray sparger to RPV d/p g,3 g ] I 4.2.B-24), switch 2-PdIS-75-56 was found at 1.5 psid.

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Hnported Unde:r Technica! Sp cification 6.7.2.b (1)

• na t e due NRc._.7./4/81 _

Date of O< currr.nce 6/4/81 Time of occut rena 0930.,_ Unit __.,2_,.

'derJificar, ion and Ir:.scriptwn of ()cedrrence Core sprav soarger to PPV d/p switch 2-PdIS-75-56 was found at 1.5 osid (AF decreasing). The T.S. table 3.2.B limit is 2 + 0.4 psid.

(' >ntiit tons Prior 'o Occur; ence trni t 1 - refueling outage.

tin i t 2 - modification outage.

Unit 3 - at 100%.

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Describe,

None Apparent Caupe gf Orcuri;ence' Setnoint drift.

Anaivsis of ()ccurrence There was no danger to the health or safety of the pub 1!.c, no release of activity, no damage to the plant or equipment, and no resulting significant chain or events.

( on. ci s ce A c t ic in :

The Barton model 288 d/p switch was recalibrated and successfully tested for repeatability. This is considered a random event and no recurrence control is required.

Failure Data:

BFRn-50-259/8087, 8101 Hetention :

PerWd. Lifetime; Responsibility - Document Control Supervisor

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T H evision.

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