ML19276E488

LER 79-008/01T-0 on 790219:steady State Power Level Exceeded License Limit by Less than 2% for About 6-h.Caused by Error Calculating Scanned Feedwater Flow.Power Reduced to License Limit

ML19276E488
Person / Time
Site:	Peach Bottom
Issue date:	03/05/1979
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19276E480	List: ML19276E479 ML19276E488
References
LER-79-008-01T, LER-79-8-1T, NUDOCS 7903140270
Download: ML19276E488 (1)

Text

,e e eru.,t .iof

" , nort t An o r .;oi a i on . cor.t.usr, ion J 7r Unit 2 l.lCf NSFE EVF f'T flEPOlt ! Pr.po r t I:o.-2-79-8/lT-0 CONTHot Rt OCK:

L_ LL LJl_J, C'i)

, ~.

- i i asr enio "o i .,i at t "i oo"u o "a on .n nom E LP_l.A.lP 8 9 lB ls 2 G._.9J._oI -ls_Lol_.o I of a 1 -1_oJ. ol(R.4J_i_Lt.J 1.1i J@l._ .1_J G' LIC E 'd[ C (.Of)f -14 15 6 l ' f 'v '. t *4i ': es s .s. i.55 ' ' '

t it 5-arr r E e

$$ $ ltoL @ l0 l5 l 0l -l Ol2 l7 l 7 @[0_j 2_[1_{g J 7.. [9_K ')Lo_IlJ oJ1L7. l.9J G t, i "

Docr.trouvnH wi ..,

mNr o or ",

err u em e EVENT DESCniPTION AND PROBANT.E CONSEQUENCE S h 21 Steady _ptate power level ex_ce_eded___the licens_e_ limit of 3293_MWT by..less _j i

a l than 2% for a period of about 6_ hours. The_ core _ parameters of_i.mportance . _ _ __l

, 4 I with regard to fuel integrity _we_re well within_their respec_tive_ limits _ _. . _ _ _ _j i TT1 1 during this period. Safety significance was_ minimal. _

_ _ _ _ _ l I

. 7 3 8  !

g g . _ - - - . . _ . . . - _ - _ _ - _

H3 SYSTEM CAU?E C AUSE 8 9P CCDE SI 'H C' ' $

t e. i . t CODE CO*"Gur*;IC'WI 'i4 8 i Ut d2]8 I R l C l@ [Ej@ [EJ C'3) L1 I n s I T J_Rlu JC9) [JG) L Z.J P 9 10 11 1J t3 to '

"I qut N il A t ,a ani?<n 1 sqrout "I V K  !

• J MNT YEAH HEmafNo te 5 istr O ,"L E H 'POK4";LvI 1-1 7 I 91 eci n u L.o 2 o J._8 J..1-1 Lo l1.1~

ITI L,--I IoI AcnoN roruoE trrrcr sH. *o r ne ,,N r i v.o . m u s.o 4 rH en t.- i o. .n rn TAKEN AC TION O*4 Pt A *d i .f] POD isQUH; s' i w t ti t. s q. p + s e triq :s r t

• iia' vgaip u lEl@lZl@

n u lzl@

n l Z l@I)

LoIoIoIo1w I.nYl(> ) - L,, Y_J @ [n y j('.[) [ Gj_018.J.0_j@

.n ,,

CAUSE CESCRIPTION AND COHRECTIVE AC TIC'G h) o l A 0.hMLBS./Ilr. delta between real and computer scanned fdwtr_fl.ow was_.. _

_]

i I found, causing a 2% low P1 thermal _yower calc._This ind_ic_ated._that_the..._ _ . __]

j l reactor was still within lic. the,Inal limits. Power was then r_ educed ,to_ _ _ __]

g] the lic. limit as determined by P1 GWE. All other core parameters were.___ l 4 [ calculated by the Rx Engr. to be within lic. limits during the event. I 8 9 Pn F ACll.l T V f. '?I TH' 1) f 5F STATUS %POWEH O T H F P S T A i tr; \ t>:s ovi ta y t n ' r i r, F r i , fA s i 48 t it e; (1,

[ AJ@Loperator observation JT] l E l@ l ll 0 l o"l@l" N/A 8 Jnv.,Y cob , "

J neutun OrnttrAu ~,ou.:10,cm,,(9 .

mso...,..,..m,s .(a W@ m zl@l

~

e n/A l l N/A _ _ l 8 s. ,,

.n 4s m, OE HsON'Ji t i e ro ,t..nt ; ..

NUYUf F1 TYFL D[ ZO F fin'J I 4

~

TTl8 9Io I o Io l@LzJ@l n^ l il 17 13 PE HSONfJ E L INJt! HIE S 93 NUYPCH Of 5Cill# fiUN OI ")

JB lo lo lo @lI?

fl 9 1) n/A l pi Lnn OSS OFo r08 .<4 UnAM o N Ai.t 19 7 til t i y @,

700324o27o'

. n o.

.FaIzl@l,o

~ 9 n/A ___]

PUHL (,11 y e, IS".U E D ~ / '

E L,N,j@DESCHlf l f TON -n/A d J LJ .LLL LL L!.J _LLJ d2h[ . .

m

, y ,. .-