ML20086J116

Telecopy AO 74-39:on 741221,drywell Equipment Drain Sump Isolation Valve AO-3-20-74 Failed to Close on Primary Containment Isolation Sys Isolation.Caused by Solenoid Valve Stuck in Energized Position,Presenting Valve Closure

ML20086J116
Person / Time
Site:	Peach Bottom
Issue date:	12/23/1974
From:	Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20086J115	List: ML20086J111 ML20086J116
References
AO-74-39, NUDOCS 8401230194
Download: ML20086J116 (1)

Text

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ii.E.C. region 1 P. :. ulat ory Op.:t at t.ne4 i/(ftee on ficccuber /1. 1974. ,

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P.ef etence : 1.lcon se !iueber DPR-36 i  ; .

T ec hn i c.t i Specification P.cferencn: 3.7. ~},  : . .. j ,

teport .N o . : 30-276-74-G9 'h r. -

Report Date: Deco.ber 21, 1974 'k1 '

Meurtence Mte: actember /1 l'174 _

Tacility: Frach Lotto 3 A:?nic Pov.'r St.ition .

/

it . D . 1, Delta, Pvnnuylvt.nin 17.114 .g . ./

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Identifteation of Ocentrence:

3ryw,11 wqu ipr ent drain nurp inulat tuu valve /.0-3-20-94 failed to close

n a TCl3 t rolat ion.

C.nyt t t t.'n

• I'rie? r t.o O': cur r cru.er t

';n t t 3 evera'.ing at 3102 Wr . 98 . f,?. ; ouer. 3  !:tartup Tort 27. Turbine rr 1 ;-

had jmtt twvn rerforr.ed cuu91ng reactor scrau and groWJ 2 and ) PCIS l a.o la t io n.

Dencriptien of Occurronen:

During the TCIS loc la t ion. A0-3-20-94 fa t teil to luolate. The valve; ni m issited to luolute on a tunnal elenure nipunt.

Destznation of appor.'nt Caui<e of Occurrence:

The :<olenald valv. which de-energize . to blee ! -the air of f the di sphru .

stuck in the energized pur.ition prevent in6 volve clonure.

An:alyst of Occurrence:

ilw other (nulaticu valve to this l ine. AO .3 *20 ')5. d id c lose to - luol .it e the line. Therefore, there is ntnitu t ru fety . implication.

j . Corrective. Action:

The serienoid vntve was rebuilt and sat tafactory operation vortfled within

• Iv?urs of the occurrence.

To11 ore Data:

S ir.i tar occu rrencese were reported as Abnorral Occurrence Report'Nunberr

/.0 '20.277-14-1 nnd i.0-50-276-74-26.

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