ML19208B214

LER 79-076/01T-0:on 790902,cable Separation Irregularities Were Discovered within HPCI Sys.Caused by Design Error.A/E Currently in Process of Formulating Proposed Design Change Request

ML19208B214
Person / Time
Site:	Hatch
Issue date:	09/11/1979
From:	Coggin C GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19208B212	List: ML19208B211 ML19208B214
References
LER-79-076-01T, LER-79-76-1T, NUDOCS 7909190356
Download: ML19208B214 (3)

Text

f j .7; n

.~..~.m..... c. .m. . _ , ,.

com net t. toc.; L' i

! '  : 1 IO oum nom on i v'1 i t 'a ou"" o "" oa>" nom EIi] GlAI l l IHI1 I@10 1 0 I 0 10m 10 10 10 100 IO 1 0 }IC mf m.I1}lI1l1l@ ;e rlG')

r 9 .,[ m ;F.x l

m a .. m . . u.. . . .

. roc a .

C, >

[T> i il l 3 12 11 !G' L,Ol.9 ' o 1217J. 9_!Ol DJ 9 81 11 I 7J3 '@

i a P.!.% l r. '@ [0 15 10n !0

~

ci . s. . w.a

. !O {in . . . i. i m T o.a . a ,, ewn om o ivua r,tsc;um m ; :o mou .a ac .r. tour:a '.UG ITTB [The NSSS Sur, plier contacted._91 t ant mnaaement about t nossible cable separation irrenul- j Epq prities within the HPCI system after discovering a similar problem at anoth;r B'R j

[TF. .. '1 [p l a n t . At IP00 hours on 9-2-79 with reactor of Unit 1 at steady state po'<:er of 1892 j ETE] U5!t olart erhineerinc personnel confirmed USSS supplier's coment s rrardii.g HPCI. 1

[c_LO [ Plant en{L i nnerino nermmnol revieund wirinq diaori"n and confirre I a problei lith ._ j 0171 [l[PCI cable separation did exist. This is a non-repeti tive occurrcnce. ._ _ j iTIT]E i9 3

_ _ _ _ _ _ . _ _U I

$YL. *1

. C A '.,,5

• CAU'" C OY P. Vftvs C O .' i C .~ :. f $Ut i C E CC '.' .t NT C"a' ESCCO- $ t,E: . C *

[ E-)

7 .,

15IF.l@s.

s, to

.l _B :m s:

3 ' ,L._.A l O-s / 1_7. I Z 17 l Z 17 12 'i@-

o i:

l Z I(i?)

a

. [ 7 ] (M.

m Si UU~ ' li/.t 0C01,4 V 'iE ltif(CtI Ri VI'.I U N in _ ) ) i' Iii s HL 5 f.fil

• O C 0" TY' i)

O .U",t . w.n r- l [ 7 ! 9 i i

L._2 6 .2 l-.

[ 0 J 7 i 6_]

21 au

[- 'la [0 !) j

3 i

[Tl u

l-31

' .n i L s .,

. CI L_l'J E t' T i ' e. ( ifcr;- -

,-_,y f,9 y f r , e r ;)  ?.r.nt , g ( w yr C t s .P. C C - D'". NT T A l f rJ / LI: . C '. i t.e 'e l ilmm) UOM }b . W 14 i O FGi .i M 5. LL i Lli .V A s ( r ? ! ~. 4 s l'

[x__ %al.._ .,.v F.i .9 [_ZjC) o o .!

7__h3 3

[0l0IO'OIo l Y l L'M.,

u

[ YA!Cj?

u

. . _ .s. .Zl@lZ !9 !9 i9 W 43 a ,

cescu ta sc: a nu ,e.a cc,m.a a e e nm.m Qg l i o ! Li t_.ns d i s coverod tha t t ha control circuit- for Hatch Unit 1 Division 1 Eel-F002 HPCI j li~Til Lf teca iselation valve ur. routed with ADS system control cables. Sepy stint critecia !

U_n] 1 per desian no'en uac. not nat. Desian error war determined to be_ the cause of the l

[E Loccurrence. Architect-onainer.r was notified _of the HPCI/ ADS cable separat icn Ech- J

[ i i ilc Ll cm. Thev are currently in the orocess of formulatina (continued) _ _._]

r , w 8.* E W O ~1 C F w F Mit i1Y a ,-

$4/.iU; * .F O.'e H C ' n E st S T A I L*L DIV.usthY Disc ovtH V ter 5^nti i ton 32) 9 lE!@ l01717 91 7 8 9 10 IJ 11 MA 41 l [ D W Motification from NSSS Supplier 4 ', v '6 . to l

/stilVI T Y CCeiENT l'[Lff'*n _i,F OfLt C i /,UC,,.'.Ni O f AC T:VIT Y ', L OC.u lON OF Id t [ / 'T h NA 3 NA

[ i l c l wl Z ! ? .-a I__7 7 l L

c ,

Ci 10 I O o b l. I O-e o NA D OM o, i

rtnsc u .u eo....iis -

o .

',,- [ ._,/

r. i -rn cm nain: .d ' l9I n /

M~9~

~

Iiix Lg l 0 l 0. .f . l MA _ t _ _ _ . _ . _ _

L o,.

$ o r (Ji t... ia .

T o , ACit liv t{} Q , ,,

]

[ . . ..,7[;. :,1 j

l-w,p.m. - . ___

MA .- --. q_ . -. . _ _ _ ..

l nmtenv r..e u,,_. muo r. n s . Q9 590919 O?~~l n Ps lm__.._____._._.______._._

m.

2 UA l tiI; i : 1 J' .'

< io ... . . , ..

r. .. . c, - q c , , , , . C. l. Coqcin, Sunt. ri t. i.nq . Lecv ,,g. d l.].-367-//bl _ _ __ _ 'f

Georgia Power Co:cpany Tlant E. 1. ilatch .

Baxley, Georiga 31513 ,

Cause Description and Corrective Actions (continued) a proposed de ian change request (PDCR) to provide for proper cable sep-aration by electrical division type. Upon receipt of the engineering pack-age frcai the arc hiter.t-engineer, the package will be reviewed and implement-ed as recessary, ii i:nciated LER will follow design change implcraent.ation.

D D oo O p g - ~

O J1) _ 5] _ 1 Al a

-, n' a b, (b!

Ha r ra t.t v e Report for LCR 50.-921/1970-076, Rev. 0 Plant managenent was contacted on A u r;u c t 31, 1070, (circal by the NSSS supplier in regards to possible cable separation i rre gu l a r i t. i c s within the  !!PCI systen. USSS nupplier's concern stenned from the discovery of such a problem at another BUR plant and thev (i.e. N SSS supplieri requested Hatch to revieu cable routing of the HPCI inboard ste m iaolation valve for similar probleen. On 0-2-70, at 1R00 hours, plant engineering personne) confirned the MSSS supplier's nuspicion of p o s s i. 510 cable seprartion irregularities within the HPCI  :.y s i c n tfter h a vi n r; investigated the probleu. The Unit 1 reactor was at a stcade state pouer of 189 2 Dlt at the tino of prob 2cn confinnation.

Imnediate corrective action included notification of the a rch i t ec t.-cn gi n e e r a b ou t. the cable separation probica. They were requested to provide a proposed clo s i g n ch a n t:0 r e q u e 'i t (PDCR) for proper cable separetion. Dcsign chance shouli include re-routin;, of control cable: for the inboard stean isolation valve for HPCI and RCIC system no that m i x in r; o

HPCI, PCIC, and ADC cables vill be corrected. Cause of this deviction is attributed to design error. Redundant ny s t t r.a were operab3c and caprble of p e r f o r:li n g their intended functions.

Supplenental action shall incl u de review of the proposed design ch a n r;c request upon receipt and iuplenent.ation thereof as a formal design c h a n c.e . Follouinc, receipt of the engineering package and its implementation, an update to the LER uill be issued.

At the time of the occurrence, Unit ? uan at a stendv state power of 2390 MWt. Cable routing was reviewed and discrepancies uere also found with HPCI inboa"J steLM isolation valvo control cable separation in that it also mixcd with RCIC and ADS cables. A nroposed design chrnge request is being be issued by the architect-engineer and upon receipt, will reviewed and inplemented as necessary to provide proper cable separation betueen electrical divisions /systens.

D**]Oo o Ju O g

- " ~

A o _J1J. _a , G On v (3

-