05000368/LER-1979-012-03, /03L-0 on 790127:core Protection Computer Channel B Failed,Resulting in Trips.Caused by Analog High Level Amplifier Card Improperly Seating in Connector.Card Reseated & Functional Test Conducted

From kanterella
(Redirected from ML19282A787)
Jump to navigation Jump to search
/03L-0 on 790127:core Protection Computer Channel B Failed,Resulting in Trips.Caused by Analog High Level Amplifier Card Improperly Seating in Connector.Card Reseated & Functional Test Conducted
ML19282A787
Person / Time
Site: Arkansas Nuclear 
Issue date: 02/26/1979
From: Shively C
ARKANSAS POWER & LIGHT CO.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19282A780 List:
References
LER-79-012-03L, LER-79-12-3L, NUDOCS 7903060497
Download: ML19282A787 (1)


LER-1979-012, /03L-0 on 790127:core Protection Computer Channel B Failed,Resulting in Trips.Caused by Analog High Level Amplifier Card Improperly Seating in Connector.Card Reseated & Functional Test Conducted
Event date:
Report date:
3681979012R03 - NRC Website

text

NnC F OttM F4 u 5 P.UCL E A A REGut ATOHY CeMuissa0N U lli LICENSEE EVENT HEPORT EXHIBIT A cor.rnot stoca j __1_.[ _!_j intt Ast rer on iver att 9toumro iss ORMATtGW

[_d l AlR l A l Nj o [2 jg[ 0jo 1-l0 0 i 0{ q 0 jjy0 jg_ }l j 1 l1 {Jg[_y_;

)

a s twisue coot n

,_eN n,.

_n

<t t

s i m,,,

COYr l.S_L.!j

[;7.Se' QMl.0 [ 5 jo g l 0 l316 l 8 J(gjl 12 l 7J 7_j_9f. _T)l 0 l2 l 2j6 17 l 9 }(9

.m i r.,~,,,

o,.1

. u

.e.o.o mA1,

~

tut s r un scme rm a.a enunm r cava cutwr; @

[, [ T] I During Power Escalation Testing, Mode 1 operator CPC Channel "B"

g ML failed, resulting in Dalt G LPD Trips.

Channel "B" CPC was declared 3

gi inoperable and placed in bypass.

Other occurrences intolving CPC "It" Lei.J Eare [.liR 50-368/79-006,79-007, and 79-011.

Reportable per T.S.6.9.1.9 LaJ' J L__Lbl.

j fRI

__J s

7 il

'l ti) h * ', I ( L' s ' [,

A. 't r

I i 61l

(: Lt t

'l a

e

  • t 'd '

1.t a.y>

,g

,,;,g

,,g,,

( [

d 7

M 7

4.

tt i4 1) et i

j. j

.Ea

,t' r

i+d+

1 rt k]

t *. ' - A :

i ' f45

- l st t l'I '=

's J N y a gg

( b ( N T v t A pt 8,6 P O ?l.;,1 l7I91 L-J LILLLLU Ld to 13 !

ILJ LB LUJ s

d4 s

.l

_.1 S*.

A C I t*,'e S tei g.ea f fisI 1

.41i 8) 84 i 4.P O Aus I ' l (;

8 i&

.3 %

7"]

A??Ac v[$1 ess 64 5 4 t' I '

r

't *V'

,[ N f IA8l7d A( I a,'j'd le fi

't I i

t 88&N n' A t

, i'[ f r

\\

=

(

(

(

h

)

JJ J4

)>

a J-41 4'

S; 43 se gj c e est er:;cn. res.u a ce.me c o a ac rw., (t9 [T TTl I Intuitirat. ion revealed the analor his'h level amplifie: card was not i

LW_) I properly seating in its connector.

Card was rescated and functional i

mI test conducted.

CPC "I;" was returned to service in less than 5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />

, 3

[

meeting requirements of Action Stateu"nt T.S.3.3-1 #2.

I i

4 i

a e s fA3611 f

/'~}

v(i ir s r A w.

s rem u.u st m a

,- ~,

, n,., @

l i l ', ] [jlj @ l 0 l 1 19 h][Pwr, Esc. Test l

.[A J@LNA j

Ad TIVI] W Lu f(NT 3

HE L f A A in Of HE L E A.

tij g tyg'et n '* s

- j i

NA A.

Y

.,afv (VI

  • ng (Ar l

3 4 9 Ib II 44 4,

Pt *1 kU*e N l t l

  • PG".t Ht5 g

..vom n,.

u,s.

,,1.o. 3 101ofDi@[U @[ NA i /

,, 4 o

o n

j Pt W.esNNf L v52We [1

.P^'

.w w u

i - 1010l0f[ u nu NA l

n u

L Ln uf W4 C AV ALE 10 f A':lti f f l vPI Of sCf.iP i TON [Z_J@l NA

. 3 l

P., tr a if I I V t

,ssu o vi so. -, n w.

. :'m xv LNJ81 NA 2

j !;

i lll;jj;;j

. 2 io 4

m N4w cr pr.cerni o Cris N- %iE!Y 501/ % 8-2519 y,,

7903060497