ML19340A136

LER 78-010/03L-0:on 780322,no Flow Found Through B LPIS Cooler During Performance Test.Caused by Broken Valve Position Indicator.Valve Opened & Indicator Repaired

ML19340A136
Person / Time
Site:	Oconee
Issue date:	04/21/1978
From:	Ken Wilson DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19340A133	List: ML19340A136
References
LER-78-010-03L, LER-78-10-3L, NUDOCS 8001100601
Download: ML19340A136 (2)

Text

, . - -

E

' h' a.u: m ponu ans u. s.tucLsAn cucut.Arony commission LICENSEE EVENT REPORT EXHlBIT A CONTROL ELoCC l l l l l l jh (PLEASE PRINT oR TYPt ALL REQutREO INFoAMAnoM ITTil. I.s I .uca....

> C IN is coo. l e 13 l@lo 10 l -l oucro..10

i. i. I o l 01 -1012.. ol@l u-e.a = 4uco I i .i lit I i.l@l., c.I,,.l @

rv,.

con'T lotiI

> 8 7$ lL @lofs 10loIolg IRl7 @ln I,b l tvt47 00 65 occzg7NumetR es es 9f 07ATEI g @l0 14 ! ? l1 I7 l8 l@

7. is *EPCAT OArg se svtNT otscairnca Ano paosAsts cousscusNess @

lo t 2l l Durine a performance test on the LPSW system, it was discovered that no l l"3TTl I flow was indicated through the B LPI Cooler. Investigation revealed that I f'o"TT1 I valve 3LPSW-78 was closed, preventing the flow. This valve is normally I eI open. The valve was returned to its open condition. The inoperability of  ;

t o is 11 LPI Cooler B did not prevent the system f rom performing its de:ay heat ,

io ;i; l removal requirements; if needed, because only one cooler is required and  ;

1 io,eil Cooler A was available. l l SCIE" TSE stfe$e ceumaswT:coe s su'NUr loisi r 8 l W I A l@ [3_j@ l B l@ II I N I! S T l R l U l@ ue."o'c's[.I j @ l_zj @

• to 11 12 12 is I. 20 StoutNTIAL  % A ttact 4tPCMT AEVi$3ose.

EvimT vtAn maronf No. cCct ft t No,

@ ,"q,g f,gr pino1 718 I l-1 I o f 1101 1A 2i :2 a 2. a 21 lo'J.J.

s IL I L--J U

2a ai 22 EN "S!,! o!!,' der ** "

. =sTr$" '"s'u",'87' uf=*u",'*E".Ian lE u l@l*B l@

l,z!@ lZ j@ l ofI cuas@10l

!o [],.j @ 'U'f"r"rE' (Y_,,j@ da'E lL l@.

l s a as

. .. ar ., l All l8 l 0l@

.a .,

i

\

cAuss cesemipncu Axoccanaenvs Acncus @

iiioi l The cause of the valve closure was the fact that the valve opens " backwards", l (clockwise-to-open) and its position indicator was broken. ':he valve was ,

i,,,jl l

gi noticed to be partially open earlier the same day during a valve lineup ,

gl check and when the operator " opened" the valve he, in fact, closed it. ,

,,,.i; Corrective actions included opening the valve and repairing the indicator. ,

r ae A  % 8CY .TMEASTATV3 0,5Co MY 043coVERY oE3cMirTICN li_L5 l l.f j@ l 11 o'.4lol@l NA l' l B I@l* During performance test e g.ny,y g,m u u - a I

..< m .

l i I s I LZJ @o, .. m.Lz.JOl_ou T NA o, . ,,,,, @ l l NA to.An .. ..,,A., @

l

' m e,,,'.'s x,ess ..

a

.u.... ,,,,

li t r i l o f o f ol@LZ.J@(..,c... ,o, @NA

" l

. me.. A' ,uuL =

vo... o.sc.,no @

fTo1IoI010l@l

, . . ,, n NA l

b". * "l'",'#o',', '" @

• NA 1 . L. aj@l.. l

,s Nac use oNi.y L 2. La.J d. sus @Se"semrnoa@

l i.

NA l

[!!IIIlttlltl

.o l

l NAME CF PREPAAER K. R. Wilson ,,cy,; tynn 27, g197 l 8 0 01100 b@ l l

. . 3

' DUKE POWER COMPANY OCONEE UNIT 3-Report Number: 'RO-287/78-10 Report Date: April 21, 1978.

Occurrence Date: March 22, 1978 -

j- Facility: - Oconee Unit 3, Seneca, South Carolina Identification of Occurrence: Low Pressure Injection System Cooler B Inoperable Conditions Prior to Occurrence:

100% Full Power Description of Occurrence:

i

- At approximately 0630 on March 22, 1978 during the performance of OP/3/A/1104/10, Low Pressure Service Water (LPSW) System Valve Lineup Check, it was noted that valve 3LPSW-78 was neither fully open or closed. The utility operator was

' directed to open the valve; but, when he attempted to do so, he inadvertently closed the valve. The valve operates in the unusual clockwise-to-open configuration. .The mechanical position indicator was broken so that his error was not immediately detectable. At approximately 0830 during the performance of PT/3/A /025/1, LPSW Performance Test, it-was discovered that no flow could be established through the B cooler. The subsequent investigation indicated the' erroneous valve closure and the valve was opened by 0845.

Apparent Caus' of Occurrence:

l . The cause.of the occurrence was the broken position indicator coupled with the clockwise-to-coen characteristic of the handwheel.

Analysis of Occurrents:

^

The closure of valve LPSW-78 removed LP Cooler B'from service. One cooler is necessary for decay heat removal (FSAR Section 6.1.2.7).

Since LP Cooler A was available, the occurrence caused no loss-of-function to the system.

, Public health and safety were not endangered.

1 Corrective Action: i i

The valve was' opened to return LP Cooler- B to service. All clockwise-to-open'valvesfat-the Oconee Station will be identified and tagged and-any.

broken position indicators:will be repaired.

r w

t-

,J v , . . , , , ~,. -

- r