05000259/LER-1979-026-03, /03L-0:on 790926,recirculation Pumps a & B Tripped During Troubleshooting on Main Sea Level Temp Relays.Caused by Troubleshooting on Wrong Terminal Strip.Strips Relabeled for Better Identification.Pumps Restored to Svc

/03L-0:on 790926,recirculation Pumps a & B Tripped During Troubleshooting on Main Sea Level Temp Relays.Caused by Troubleshooting on Wrong Terminal Strip.Strips Relabeled for Better Identification.Pumps Restored to Svc

ML19259D706
Person / Time
Site:	Browns Ferry
Issue date:	10/22/1979
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19259D698	List: 05000259/LER-1979-026, Forwards LER 79-026/03L-0 05000259/LER-1979-026-03, /03L-0:on 790926,recirculation Pumps a & B Tripped During Troubleshooting on Main Sea Level Temp Relays.Caused by Troubleshooting on Wrong Terminal Strip.Strips Relabeled for Better Identification.Pumps Restored to Svc
References
LER-79-026-03L, LER-79-26-3L, NUDOCS 7910260269
Download: ML19259D706 (2)

LER-1979-026, /03L-0:on 790926,recirculation Pumps a & B Tripped During Troubleshooting on Main Sea Level Temp Relays.Caused by Troubleshooting on Wrong Terminal Strip.Strips Relabeled for Better Identification.Pumps Restored to Svc

Event date:
Report date:
2591979026R03 - NRC Website

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EVEN T DEJ'lHJ' ION AND PROP A8LE CONC.COUENCES h ITTTl Lpurins_ normal _ operation, A and_ B recirculation, pumps tripp_ed_ during trouble shooting _

l 'i.'. i,of MSL te3pe_r_at3re__ relays. The troubleshooting _was performed on the wrong terminals 3 C 2 t_iE._the auxi_lia_ry instrument room. _ U-l operated, for, 28_minut_es with no recirculation j 3i, pu.mps_,(T.S. 3. 6.F.5). _ _. _ _ _. _There was no hazard to the public health or safety. There havei

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CAUSE DE9.I'iaTION AND CORRECTIVE ACTIONS h

!t l Troubleshooting on the wrong terminal strip in the auxiliary instrument room. Termi _,

l nal strips have been relabeled to better identify the strip and terminal numbers. Load i

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was reduced to 35 percent and the recirculation pumps restored to service. No further

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1/10 N LER SUPPLEMENTAL INFORMATION BFW

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il-. r;p i. :. [ ' ' e: 1 r. rf e While attempting to identify a bad steamline temperature switch,both recirculation pumps were tripped. Gperators followed the immediate operator actions in E0I-1.

(?..dit: 'n:: Prior to Occurre:.e:

Unit 1 operating at 98 percent power.

Unit 2 @ 100% cover.

Unit 3 in cefueling outage.

Acuan spectfieu in the Technical Specific?tien Surveillance Requirements met due-to tr. operable eguipment. _ Describe.

The reactor was operated 28 minutes without the recirculation pumps in operation.

T. S. 3.6.F.5 allows steady-state operation up to 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> with both pumps out of service.

App. ire r.: C a u :..-,f Occug< n:.c :

Operator identified wrong terminal strip.

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- r P00R ORGINAL

(! ort < :!;ve Actir.n Terminal strips have been relabeled to better identify strip and terminal numbers.

Failure Data:

7 None

'R eten tion :

Permd - Lifetime; Respensibility - Ad=2ini:.trative Supervisor

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