05000366/LER-1980-107-03, /03L-0:on 800719,during Routine Power Ascension, Determined That Method for Verifying Jet Pump Operability Not in Compliance W/Tech Specs.Caused by Inaccurate Method Re Calculating Delta P Variance.Method Revised

/03L-0:on 800719,during Routine Power Ascension, Determined That Method for Verifying Jet Pump Operability Not in Compliance W/Tech Specs.Caused by Inaccurate Method Re Calculating Delta P Variance.Method Revised

ML19330C747
Person / Time
Site:	Hatch
Issue date:	08/04/1980
From:	Coggin C GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19330C744	List: 05000366/LER-1980-107, Forwards LER 80-107/03L-0 05000366/LER-1980-107-03, /03L-0:on 800719,during Routine Power Ascension, Determined That Method for Verifying Jet Pump Operability Not in Compliance W/Tech Specs.Caused by Inaccurate Method Re Calculating Delta P Variance.Method Revised
References
LER-80-107-03L, LER-80-107-3L, NUDOCS 8008110413
Download: ML19330C747 (2)

LER-1980-107, /03L-0:on 800719,during Routine Power Ascension, Determined That Method for Verifying Jet Pump Operability Not in Compliance W/Tech Specs.Caused by Inaccurate Method Re Calculating Delta P Variance.Method Revised

Event date:
Report date:
3661980107R03 - NRC Website

text

u.s nuet u.u necut.,vrony cow.wt; ton l

t i

ieonM u h

LICENSEC EVENT REPOR f I

mj f

j($

(PLLA';L fium OH MN Alt. nt_ovento Ugogmnom l

,. -)

L, ],]

j_)

co;;inDL HL Off",

l l

l,a

_ LO l 0 [ - ),_0j 0 l_0_L' O [0 l - 10 [G fW._._4.[j].._1.[j k1.lOf1 s

@ l.u: I A j E__l T I H l ? G4 n

u ou t. : nn

.e w w v.

f j

uu w. s.m a 8 9 um i ur;e 14

@[ 0_L Sj_ O! /d aj_ 0.j 1

s.

'Q" [wr)[ O l 5 j 0 [ 0 l 0 l 3] 6 j 6 '1'M 0 Q j 1] 918 [0j

.g s

L l]

a n

m mi c.u t a

A e

m be ivrm su

- d o

o r,out r exvm L Vf NT D! ',M FIH)N /.f..') L HOD Aid & CO!s7L OijE i LS v e r i f _ind e t.p_unpa psy- __]

u y lliuring rou t in e power a r, c e n c i o n the method of 3

r ev iewed and found not to be in f,11 coppltance vith_ Tech l

g jab]1ily was

] l Spec requireuents.

The noncompliance involved the enJculational ne-J p;][thod of deterniolan jet pump del tu P variances.

There vero no errects l

l p [upnn public health and saf et y due to this event.

_.J

~~G L.__ _ _ _ __.__.

._ __.-~____._. -__ -

_._ ~

4

_ _. _.. _ _,., _ _ ~. _ _ _

CG'.Y, y;,1 y g 6 9 SY'. U "

CM l* E C M,*.6 CO!.9 mJ'n COtM SukugE sur:co n CCD; C oiiE

' M.

00

.I

. ?. _?

{.

23 t

1-1)

O 9

16.

1) il 13 I;LVIN W CCCUPl.T T CC M 7041 M O'JL t;1' At (QC TiPE F:q I LF OH f f.O.

oI [d"l b~j

{$~'

L66, u,l LVIN1 YL/ ?!

~Q) ld j 0 J~3 j

],

P" {j ~B

([-.-

[ 1.

O C

r h

(Tj 31 6 ]j 7[

.'b (g n xL a, t *.1 rJ. 'O =

r,. l *. '. q.2, ac t.*g. c n,

l'OU T *,

sim ",*) ; ; Lii

IGMtsti,

$U;.Pt 4 E FT PJA:a t/ :ltt o f.C T In:t t U* i t 11Inti H.at;;

0 0l

[.l9 p_l',3

[..Z.liO'e [2 9 9 ! !) j(D; 1/ Ks is

/CI.

r*; s : /. 7 T.*E' %,

F, v

q, 31 49 43 4) n 4g f

.)

.~ d

.~s._

1s- - - - gg *31 n

a, ConHECilVE t.Cl to!d h C/J TE : ' CR'i TION rc v. etz i n g }n P -2.-9 / 0 0.l e t P u mp_ht c <- v i t y, it v.. a fonmi net to r e n t_J gd}j[Uhile s 4n.1 r.c g_..l u

e qq l tl e full r e r;u i c e ien t : of Tech F,ec li. 4. 1. 7. c which in Im r t i

1 del ti P of a 11 j e t !

he conparnd to_Ip avernLo del 1a p reanurrDonf 4

{jq jthnt in the r e.1 p a n t i v r-

1. o o p.

W P-2-9'iOO vat r e '.- i n e d c ;. n r e nc i t.

an?

}

q l puupt in in full corp 1fonce uit h the

'l e c h r_1, c c vern t reneu r s.

-- __ J' b>

.3_17g Lnou 7

8 9 U THOM Of DISCOVEW U* SCRu il'f 4 p

F Af HII(

O filH $1/. I U.=

Di' C O'JL ftY

- _i _g,

_ g1 l 3.p$

l.'A l P. l

[

Proced.:re revier

.l

$ i rs 101

. 5 PO.".f G n

I ;g

_J_

m 4:

C,

4.,

s e e te u

11

/ C. eV1 f Y tO'!fLT I LCC A UCN Or PE! *.C J

I:t M A..L U O! td l L A. J A'.10Uf4f Of ACliVt TY NA l

l NA G E._Jl1L_El ('d) i(_E L]____

o t

JG a

e

.7 8 9 to o

mw.trt twt us

_._.]

61 d.ht ( e l

') Y S [

OsJ g t Gi l 0'4 lWl l 0if J U !@l.l. j$5I

'a N^

m e 1 u

o F[!' 0 4.Ett!.Jt T N f

NUVIiit

! t f ( hip 1 o',4 '

__.____J NA L}._ Ok.RlJ L 4 o

p_ '_..l [. O' O

. a

..i a <.

n i.-

i wc os o.i e, m ic Fen n y 1Yo D L:.Cil w i l(IN L_

p,0 O

J 1

10 O

8008110 4

_ll l l f l. _l.l.

h'PT I TJ 15.sU NA

_O l

Ml f.3 03 s

o 1

e 9 1:

%.!' ",. $ P TV, (;I M,. L 9 I 2 _u'l b_L.l". "[$ I 1

E E

- bt!D t.

1I.

w..._.._

o.

i LER f:

50-366/1980-107 Licensee:

Georgia Power Company Facility Name:

Edwin I.

llatch Docket #:

50-366

Narrative

Report for LER 50-366/1980-107 During a routine power ascension after a control rod pattern adjustment on 7-19-80, the method of verifying jet pump operability was found not to fully comply with Tech Specs 4.4.1.2.c requirements.

Tech Specs

require, in

part, that individual.

jet pump differential pressure measurements be compared to the average differential pressure of all 10 jet pumps in its own loop.

If any of the variances from the average are 10% or greater, further engineering analysis is required.

However, it was discovered that HNP-2-9400, Jet Pump Integrity, calculates these variances based on the average differential pressure of all 20 jet pumps on both loops.

Upon discovery of the procedure error, llNP-2-9400 was revised to fully meet the Tech Specs requireuents.

The impact of this error on e.s t calculations and results was determined to be negligiF_'e due to the fact that both loops usually have similar average differential pressure values; consequently, the variancer, from the average calculated by both methods are usually similar in magnitude.

In addition, the Unit 1 Tech Specs and procedure HNP-1-9400, require that the variances be compared to the average of all 20 jet pumps in both loops, a f act _ - which further explains how this discrepancy originally occurred.