05000334/LER-1980-010-03, /03L-0:on 800131,refueling Team Was Given Go Ahead for Core Alterations.Fifteen Minutes Later,Inservice Boric Acid Transfer Pump CH-P-2B Tripped on Thermal Overload. Probably Caused by Faulty Blender Controls Shifting Speed

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/03L-0:on 800131,refueling Team Was Given Go Ahead for Core Alterations.Fifteen Minutes Later,Inservice Boric Acid Transfer Pump CH-P-2B Tripped on Thermal Overload. Probably Caused by Faulty Blender Controls Shifting Speed
ML19344D296
Person / Time
Site: Beaver Valley
Issue date: 03/04/1980
From: Werling J
DUQUESNE LIGHT CO.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19344D281 List:
References
LER-80-010-03L, LER-80-10-3L, NUDOCS 8003110643
Download: ML19344D296 (1)
v • d • e


LER-1980-010, /03L-0:on 800131,refueling Team Was Given Go Ahead for Core Alterations.Fifteen Minutes Later,Inservice Boric Acid Transfer Pump CH-P-2B Tripped on Thermal Overload. Probably Caused by Faulty Blender Controls Shifting Speed
Event date:
Report date:
3341980010R03 - NRC Website
v • d • e

text

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en i r. fag.a EVENT DESCRIPTICN AND PA09 A8LE CV.StCUENCES h I 3 i 21 l At 1315 hours0.0152 days <br />0.365 hours <br />0.00217 weeks <br />5.003575e-4 months <br /> on 1/30/80. the refueling team was advised that all prerequisites were; At 1330 lumrs, the inservice Horic Acid l

g g l met and core alterations could start.

10 l a l l Transfer Pump [Cil-P-2B] tripped on thermal overload. Core alterations were stopped l In i s t l at this time. Core alteration was resumed at 1400 hours0.0162 days <br />0.389 hours <br />0.00231 weeks <br />5.327e-4 months <br /> after verifying the pump

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10 t.51 l recirculation pressure was above the reonired technical specification value. No f

l o l 7 l [ decradation to any margins of safety either to the plant or the public resulted.

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a3 30 3I 40 el 42 4J 44 47 CAUSE DESCRIPTION AND CCARECTivE ACTIC.NS h lijot]The cause was not definitely determined. Numerous blender operations due to faulty l g,;ii; blender controls shifted [Cil-P-2B] the Boric Acid Transfer pumps from slow to fast

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,,,,jl speed and back numerous times. Blender operation was suspended and makeup to l

Blender controls [FCV-CH-119A} were j

g l [Cil-TK-1B] Boric Acid Tank was stopped.

1 repaired on 2/2/80. thus precluding any further problems.

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