ML19256A131

LER 78-054/03L-0:on 780930 Torus Vacuum Relief Valve AO-1601-20B Would Not Close.Alarm Received.Valve Fully Open. Caused by Blown Fuse in Control Circuit Due to Short in AO-1601-203 Air Operated Solenoid Valve

ML19256A131
Person / Time
Site:	Dresden
Issue date:	10/24/1978
From:	Parcell COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17173A324	List: ML17173A323 ML19256A131
References
LER-78-054-03L, LER-78-54-3L, NUDOCS 7811030145
Download: ML19256A131 (1)

Text

... . .. .m.. . - _ . . . ~ . . . .

LICENSEE EVENT REPORT ccNincL etoc<: l l l l l l l@ {PLEASE PRINT OR TYPE ALL REQUIRED INFORMATICNI IM i lI l LlDlRlS 2 @jd l 0 l -l 0 ! 0 l 0 0l0l-l0l0l@l4

/ d ') L I C :, LE CUL L 14 '5 ULE .5 L NUYet 44 4 '

.6 1 l. 15E lI 1N lPE1JJl@l$1 L+

l tai ed l@

covt 3 ') l'i N'Nt l Llh[_01 5 l 0 l 0 l 0 l 2 l 3 l 7 @l 0 l 9 l 3 l O I 7 fljhl1l0!2l4l7lRlh LVE'4T GESCRIPTION A DPRCOA C Sf ' NCE3 0 .I l During normal steadv state operation, the Torus Vacuum Relief Valve A0-1601-20B not I

o i l closed alarm was received in the control room. An immediate visual inspection I ai.1l verified the valve to be fully open. Per T.S. 3. 7. A.3.b. backun vacuum breaker io ,i [ 1601-11B was secured closed to maintain primary containmant intenrity. This is the l l o 10 [f_irst event of this type. I i I / } l mi I u0 SYSTE'1 C AUS E C AUSE C O*.* P. VALVE COD- CODE SUSCCCE CO'#CNENT COD ~ S U d GC C E SUSCCDE aiis l Si Alh [Ejh a u l Au lh lVu l A l L lV l0 lP 'hul Elh lF lh .., ..

T 12 N T l f. L CCCU O P E *.CE PEFORT NE EISION

, ,. . :N T N E L1 hE 30 I T NO. CCDE TYPE N O.

';j

+ .

. , Ll. 7 t 8 ! l1 l0!514l lA lo !3 l l- Ll l-l L!

. u u ., u = .a n n

/,r. T i ", *4 prycr ;Ht i f DC". . ATTACHVENT N W O.4 PPI'/E CC MP. CC'.* PO N r N T l ar L's ..iGT.A

>Tr.i'E JN A. ANT ME THGs PCUPS 122 O) JU3V T*ED FCRM dUS. CUPPLIEit UANUFACTLPEr1 lA!$ [!@ l Z i@ lZl@ l 0 10 l 0 !'o a lN {@ lNl(9) lN!(Q ly10 1 915l@

w

a. t n 4i 42 .a u o

ALTE DE:'JRIPTION a*.'D COPPECTIVE ACTIONS

,i a l The A0-1601-20B air operator solenoid valve (Type AU3) shorted resulting in a control !

g ircuit blown fuse. The valve failed open as designed. The solenoid and fuse were l

.j j replaced and the valve verified operational by operability surveillance. No additionai

, , l action is required since this is not a recccurring event.

i ii i I s 1 40 r sa.. : t r Y '.* E Tu n D C F 51Afus *4 PG'A F H oTHERSTATur DiscOV E R Y DISCOVEHy DESCntPTION NA 5 l 1lE l@ l 100 l 9 l 3 l@l

,1 12 11 44 l l45A l@l'46 Annunciator Alarm 80 l

ACTIVITY CON Tr N y RELL1SEO GFRELCACF AVOUNT OF ACTaVtTY LOCATION OF HEL L 3E NA NA l 6 l l 7. l h 10l 7 [t) t 9 ti 44 l l 45 '!3 l

PErdCM.E L E.sPmUHi S NUM3EH rYPE CESCPIPTION 1

7 l l 0 l 0 l0 l@l 7, (@l NA j i ) 11 17 13 SJ F EPCNNE L 'NJUHIES N r.'tq q OTscit PYiON

t. 10 ' O ' O 'Ol NA 4 b n" u ten oF an .uvar r ro racitiTv co Tict . 2Cnw fin'.

I + 1 l Z !:g[ NA l t ; m eo

$, NRCUGfCNLY u:U sCnunoN h ,

I O I !1]DI NA I IIIIlllIIllIl}

'. Jp v s.

4 W, t O [>

t,8 09 4.%

o N A v r.:. FP EPAREn Parcell PHONE: 265 g

- - . - - - -. -. -