ML19208B464

LER 79-100/03L-0:on 790905,while at 89% Power During Load Increase,Critical Mass Peaking Factor Was 2.57,exceeding 2.38 Limit.Computer Update Did Not Correct Problem.Caused by Inadequate Personnel Action

ML19208B464
Person / Time
Site:	Hatch
Issue date:	09/17/1979
From:	Coggin C GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19208B463	List: ML19208B462 ML19208B464
References
LER-79-100-03L, LER-79-100-3L, NUDOCS 7909200350
Download: ML19208B464 (2)

Text

II . . . . . , . - g, .. . ..

1 w p . . ;. ;.: :. . . . s . .'. ' w r , t COrdinOL BLOCR l l l l l l (PLE ASE PRINT On TYPt J.LL RLOUtHtO luf Cit'.1ATIONI Jo li j l GI Al E l I I Hj 2 j@l 0 ] 01.-l 010_l _ 01010 l- 1010 l@!411 l1 11 11_l@js ce. l_j i ,, @

a a uu,a ut.~ n .. a. oce.a nPt ..>

> y t. t.ct..su Com Cs fiU i 3.:l" LLj@l 015 l 010 l 0 l 31616 e.;t@lLJ0 I 9E\ENI I 015 DAll I 719 !@[019l'.iFQrt 84 83 l1 1717_l9 i D Ai r. L3l@

i C L's _ 61 DO .;E I t;U$.y E H tvr a ntsemnon Ar:n enonActt conrtoutncer. @

jo j2; L'hile at ~89% power during a load increase, CMPF was fotind to be 2.570. The limit isi Flow increased and a computer update was performed to reduce CMPF. After 2  ;

,o,,j  ; 2.38.

hours, the power had not dropped significantly and the APRMs had not been adjusted in [

p , ,, , t violation of* Tech. Spec. 3.2.2. Following the two hours, the rod pattern was adjusted j n 3 ,

g g ; [ and another computer update t:as performed.

CMPF dropped to 2.105. This is a repeti- ;

ccurrence - see LER 2-79-58. There were no consequences to the hebith and safetz o  ;

Lv ti of the public.  ;

gg L3 7 8 9 C O' 'P. vetyr SYST E P.1 CAUsr C A US E CGOE CODE SUBCOOE CCWCNENT CODE SUSCCOE stistcar O o QJ_l_J @ [ Aj@ [ X l @ l Z I Z I Z I Z I Z l Z l@ l Z l@ lZ  ? .3

• lu N l@

9 10 17 12 7 8 Ii fE VI' lON SE Ct!T Nil Al CCCU44f\CE ICf Orti y

E V E *J1 Y E Ns R E F' OR I *.O. C C O :. 1YPE *O p p eg ec"T ln 1l 010] l A' [0 i 3z.,l [L l 1! [r0j

@ s(owta ;l 71 9' -t [r-J a n u 32 n-ATT ACHU 1 P.P H D.t . F'H t V F CO*.'P. CO*/PCN' NT ACTCN F UTl'T L EF5ECT Sm f T DM.!J hl A NL 3 /Cl'. CI; h O'J F L A' 1 Vi THO:J MC'JitS 12 LUW61 ^6 L D F CIRIM t EU5Ptt?

T A *'. 3 N ACTIC ILj@l._Zj@ [_1j@ [010'0!Oj bij@ U!.j@ LZ l@ LL]9l9I9j@

u u L1]@

n n 3 .- ca e a n u a cAust ccscamnon, No ccantciivt Acuom @

[siui lFollowina moverent of control rods, CF.PF was found to exceed its linit. Initial cor- j li li l Irective action taken did not significantly. reduce CMPF and the 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> tiim lirit hild._.J g { elapsed before further action was coEnleted. The rod pattern was adiusted cud a com- 1 i 3 lputer update nts perforned which corrected the peakinq problem. Personnel involved I i

ip lhave been advised that action taken was inadequate and have been reinstructed on E3 7 C S a,* E T H O"J CF .

F ;. Cit i T Y ">r 2 LIAlus *. PGAEH OT HE Ft ST ATUS OtsCOV E HY OtSCOVEltY DESCniPilO'i N/A l lBl@l" Engineering observation I li [s] l f !@ l0 18 l9 "l@!" "" '

" , Chiry Co'OmJT tOcAuoN O, ,uEm @

..uimo c.,nufxE D p l I 7! @ LZj@l -oUni N/A g .sCm,1Y @ l l N/A l 44 4 's IJ 7 8 'A IJ 11 PEllSGN'4[( f y PC',UHE $

,;U'.t.i l H lYFE DE50 HIP 110'J J I

liIil 10 i 010 j$1 Z!@l N/A mom uj 0 n

,o.m . n,mema't.nas on;HiPnm@ d a vjl

.lTl[0_[0_[0j@l N/A m r, A1~_- l e s u u

@ j y Al . _p

, ii

, z 3, b i s,o,oi,rvOc sJ ; 1_ ,jg' o ._ /c, m w., GH n, . .

n.. t. no. - n o, v tTL; ~

[) 1] L71@l N/A

~

~J t,a es 's 1>

t J H C L,P.f UJ1 Y

1. U' l " 'I V b *

.. . w ouuanwt LuoJ11LlhL N/A 7000200 3 50 .

i LLLi ! i i i LLLL,,j y Pi tt).N 6 N.*** - __

.ifr l't ;a P.T i t ! ? (

-_ _- . , . .Ccorgia Power Compa.ty -

Plant E. I. Hatch Baxley, Georgia 21533 '

Cause Description and Corrective Actions (Cont.)

appropriate procedures.

O e

e 9

. er e f e

0

• fl D o ,c] _b orin W l;uT d~

a o Lru u al; t, 'G

/s 7bb

-