05000336/LER-1978-019-03, /03X-2 on 780803:while Operating 13U Diesel for Surveillance,Leaking Injector Pump Observed.Caused by Elemental Lead Inclusions,Resulting in Stress Risers at Surface of Valve Cages

/03X-2 on 780803:while Operating 13U Diesel for Surveillance,Leaking Injector Pump Observed.Caused by Elemental Lead Inclusions,Resulting in Stress Risers at Surface of Valve Cages

ML19273B915
Person / Time
Site:	Millstone
Issue date:	06/14/1979
From:	Stratman R NORTHEAST UTILITIES
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19273B913	List: 05000336/LER-1978-019, Forwards LER 78-019/03X-2 05000336/LER-1978-019-03, /03X-2 on 780803:while Operating 13U Diesel for Surveillance,Leaking Injector Pump Observed.Caused by Elemental Lead Inclusions,Resulting in Stress Risers at Surface of Valve Cages
References
LER-78-019-03X, LER-78-19-3X, NUDOCS 7906180499
Download: ML19273B915 (2)

LER-1978-019, /03X-2 on 780803:while Operating 13U Diesel for Surveillance,Leaking Injector Pump Observed.Caused by Elemental Lead Inclusions,Resulting in Stress Risers at Surface of Valve Cages

Event date:
Report date:
3361978019R03 - NRC Website

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im LVEN T DESCnWUoN AND PnO9AHLE CoNSEoUfMCCS h O ITl l Uhile operating the 130 diesel for surveillance,ji leaking injector rgnp was j

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observed.

In accordance with Technical Specification, Section 3.8.1.1, action ~

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statement (a), the 13U diesel was declared inoperable and the operability of the I

O gl remaining A.C. sources was verified.

The diesel is a Fairbanks-Morse Model

'j o riq l 38TD8-1/8, and is rated at 2,750 kilowatts.

The failed part was an in.icctor pump

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valve cage, part number 116103127.

A second failure of a valve cage occurred arr i

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cAust otscnWflON AND CONNECTIVE ACTIONS h lT[Til l A crack was found in the valve cage in botji instanclcs_amLib.e_naans_were replac.ci J

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In both cases the 130 dies _el was restarted ancLit.s_oparability verified.

it had i

g[ been out of service about 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> and 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> respectively.

Following the second l

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fai' lure all the caqes on the 13U diesel were checked and no other cracks were found.

I [Tla 1 An analysis of the failed parts by the vendor showed nanufacturing defects.'

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R. A. Stratman 203-447-1791

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