05000346/LER-1978-009-03, /03L-0:on 780112,component Cooling Water Heat Exchanger 1-1 Outlet Isolation Valve SW 1424 Declared Inoperable.Caused by Component Failure.Solenoid Valve in Control Scheme Found Burned Out.Unit Removed

/03L-0:on 780112,component Cooling Water Heat Exchanger 1-1 Outlet Isolation Valve SW 1424 Declared Inoperable.Caused by Component Failure.Solenoid Valve in Control Scheme Found Burned Out.Unit Removed

ML19326A153
Person / Time
Site:	Davis Besse
Issue date:	02/08/1978
From:	Kovach S TOLEDO EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19326A149	List: 05000346/LER-1978-009, Forwards LER 78-009/03L-0 05000346/LER-1978-009-03, /03L-0:on 780112,component Cooling Water Heat Exchanger 1-1 Outlet Isolation Valve SW 1424 Declared Inoperable.Caused by Component Failure.Solenoid Valve in Control Scheme Found Burned Out.Unit Removed
References
LER-78-009-03L, LER-78-9-3L, NUDOCS 8002030028
Download: ML19326A153 (2)

LER-1978-009, /03L-0:on 780112,component Cooling Water Heat Exchanger 1-1 Outlet Isolation Valve SW 1424 Declared Inoperable.Caused by Component Failure.Solenoid Valve in Control Scheme Found Burned Out.Unit Removed

Event date:
Report date:
3461978009R03 - NRC Website

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Component Cooling Water (CCW) Heat l

ia64l l Exchanger 1-1 Outlet Isolation Valve SW 1424 was declared inoperable.

This olaced thel

3tsjl unit in the Action Statement of Tech Spec 3.7.3.1.

There was no danger to the health j

o is l land safetf of the public or to unit personnel.

The other two CC'J Heat Exchangers 1

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47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h liiollThe cause of this occurrence is comoonent failure. A solenoid valve in the Control i

t;;3 l l scheme was found burr.ed out.

The unit was removed from the Action Statement of Tech i

l Spec 3.7.3.1 on 1/13/78 at 1825 hours0.0211 days <br />0.507 hours <br />0.00302 weeks <br />6.944125e-4 months <br /> when Component Cooling Water Pumo 1-1 was stooned

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The defective solenoid will be reolaced when carCs are received.

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DAVIS-BESSE UNIT ONE NUCLEAR POWER STATION j

SUPPLEMENTAL INFORMATION FCR LER NP-33-78-11 DATE OF EVENT:

January 12, 1978 FACILITY:

Davis-Besse Unit 1 IDENTIFICATION OF OCCURRENCE:

Component Cooling Water Heat Exchanger 1-1 Outlet Isolation Valve SW L424 was inoperable.

Conditions Prior to Occurrence: The unit was in Mode 4, with Power (W.CO = 0, and Load (MWE) = 0.

Descriotion of Occurrenae: At 1930 hours0.0223 days <br />0.536 hours <br />0.00319 weeks <br />7.34365e-4 months <br /> on January 12, 1978, a Reactor Operator found that SW L424 was not operating properly - it sometimes stuck open and some-times stuck closed.

Component Cooling Water Heat Exchanger 1-1 Outlet Isolacion Valve SW 1424 was declared inoperable.

This placed the unit in the Action State-ment of Technical Specification 3.7.3.1 which requires two independent operable component cooling water loops in Modes 1, 2, 3 and 4

-- Designation of Accarent Cause of Occurrence:

The cause of this occurrence is attri-uted to component failure. A solenoid valve in the control scheme was. found burned

- out.

Analysis of Occurrence: There was no danger to the health and safety of the public or to unit personnel.

The other two Component Cooling Water Heat Exchangers were operable during the time that SW 1424 was inoperable. Also, SW 1424 was placed in the fail-safe position (open).

Corrective Action

The unit was removed from the Action Statement of Technical Specification 3.7.3.1 on January 13, 1978 at 1325 hours0.0153 days <br />0.368 hours <br />0.00219 weeks <br />5.041625e-4 months <br /> when Component Cooling Water Pump 1-1 was stopped and 1-3 started.

Component Cooling Water Pump 1-2 remained in operation.

The unit thea had two operable cooling water loops.

The defective solenoid was removed, but no replacement was available on site.

Another solenoid was ordered from the valve vendor, Hammel-Dahl.

This will be installed upon its arrival which is estimated to be January 24, 1978.

Failure Data: On Decer.ber 12, 1977, Service Water Outlet Isolation Valve in Com-ponent Cooling Water Loop 1-2 Heat Exchanger was found to be closed.

The cause of the December event, however, was personnel error.

LER #78-009

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