05000346/LER-1977-113-03, /03L-1:on 771216,auxiliary Feedwater Valves AF 599 & AF 608 Discovered Closed & Breakers to Motor Operated Valves Ms 107A,AF 3871 & AF 3872 Open,Resulting in Inoperability of Auxiliary Feedwater Trains

/03L-1:on 771216,auxiliary Feedwater Valves AF 599 & AF 608 Discovered Closed & Breakers to Motor Operated Valves Ms 107A,AF 3871 & AF 3872 Open,Resulting in Inoperability of Auxiliary Feedwater Trains

ML19329B943
Person / Time
Site:	Davis Besse
Issue date:	01/11/1978
From:	Jerrica Johnson TOLEDO EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19329B942	List: 05000346/LER-1977-113-03, /03L-1:on 771216,auxiliary Feedwater Valves AF 599 & AF 608 Discovered Closed & Breakers to Motor Operated Valves Ms 107A,AF 3871 & AF 3872 Open,Resulting in Inoperability of Auxiliary Feedwater Trains ML19329B941
References
FOIA-79-149 LER-77-113-03L, LER-77-113-3L, NUDOCS 8002070543
Download: ML19329B943 (1)

LER-1977-113, /03L-1:on 771216,auxiliary Feedwater Valves AF 599 & AF 608 Discovered Closed & Breakers to Motor Operated Valves Ms 107A,AF 3871 & AF 3872 Open,Resulting in Inoperability of Auxiliary Feedwater Trains

Event date:
Report date:
3461977113R03 - NRC Website

text

U. S. NUCLEAR REGULATORY Co.1t_tiSSloN NRC FtRM 366 (7 77)

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8 60 61 OCCKET NUM8ER 6a 69 EVENT DATE 74 75 REPORT QATE do EVENT CESCRIPTION AND PROBA8LE CONSEQUENCES h I o i 2 I I At 1315 hours0.0152 days <br />0.365 hours <br />0.00217 weeks <br />5.003575e-4 months <br /> on December 16, 1977, it was discovered that Auxiliary Feedwater Valves l

AF 599 and AF 608 were closed, and the breakers to motor operated' valves MS 107A, l

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,,,,,,; AF 3871 and AF 3872 were open. This rendered both Auxiliary Feedwater Trains inoperaq ble and placed the unit in excess of Tech Spec 3.7.1.2 and in Limiting Condition For l lo Is1 l g o,,, l Operation 3.0.3.

There was 'no danger to 'the health and safety of the public or to l

joIyl l unit personnel. Valves AF 599 and AF 608 would have opened returning AFP 1-1 to l

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operability if a steam line or feedwater piping rupture had occurred.

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CAUSE DEsCRIPT1oN ANo CORRECTIVE ACTloNs h

' S 1i i o I l The Cause was personnel error; an operator performing a Surveillance Test misread one l At l g l of the steps and closed AF 599 and AF 608 and opened the aforementioned breakers.

l 1345 hours0.0156 days <br />0.374 hours <br />0.00222 weeks <br />5.117725e-4 months <br /> on December 16, 1977, valves AF 599 and AF 608 were opened and the breakers;

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[ to MS 107A, AF 3871 and AF 3872 closed.

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