ML19269B944

From kanterella
Jump to navigation Jump to search
LER 78-049/03L-0 on 781218:surveillance Testing Revealed B Rod Block Monitor Set Points Had Shifted Upwards Approx 15%. Caused by Failure of Zener Diode in Flow Bias Circuitry Power Supply
ML19269B944
Person / Time
Site: Peach Bottom Constellation icon.png
Issue date: 01/10/1979
From: Cooney M
PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
LER-78-049-03L, LER-78-49-3L, NUDOCS 7901190083
Download: ML19269B944 (1)


Text

n. . .f... 4 cc, o i , e c t c <- - . -.// W

. el Niitivi U r oe . ,t. n i<. '

1 . , . . q.. 'ry ' s ii . .i...

it? e m.. < u

> . . , i , , - , , ,,

'i i r W, , .r:

nic L3 .scrc M m upwurd at.ifi vf et i m-  ;.

201210ck IIcnitor. "he applict.ble Tecimical Jp- cificatun u . .: Z.

This is a ecnditicn of cperatir.g in the legaled ude :n r m.it+el . an 1 raportable under Tc:hnical Epocifiestien 6.9.?.L if).

THIS DOCUMENT CONTAINS POOR QUALITY PAGES u s e. . .n w . a r c a y c ow. . <

LICEf6CC EVEfJT Rf PORT

' l ' '

5 7 + *. m 4 *

  • v o '. .

.rs t i _.._L_ l

! r'{ oit er.'o o<m 1.- .t u ..s o ;

M 'l !r k > > [a _h_ yIg Q L '

! l (^

, i ' ' j ._, [ .

.Ii,' ' l' Qjf I r,( }' I ; i s 1.

I: ' 17 M M I 21 1l IC 'Er.

a II ' 'O

, . . .. . .ci' . r n >. u n_ r i c,t1.E- @ ,O i gj [ __ _ '.!hile 2t never,_ sur_jeillr.aue te:tik_ reve lled + h it tv.o ~3 2>i dlcri l_.' 1 n., nit r (FE') cet pcinta had chif ted 2pwird: nprcri:.atol

erc ent.

E,i *hi:: chift .iould c.uce rol blocks to accur 2t 1 hid.o r : <r1-. 21. . _ _ _ _

[ ; J ~1 i P.edunlant chmnel '6 22M w2; ta s t ej mi fe r.d o r.>r lbi t . lie +. c. 11- _.

f. i '. l

. c:.nc e l a rinim. i ._ _- . _ . . -. . ._ . . . . _

{__1] _ _ _ _ . . _ _ _ . _ . . _ _ _ _ _ _ _ _ _. ___ . . _ ._. ._. ._

MdI _._ _. ._ _ . . - _ _ _ . . _ . . . _ . _ . -

til dj ' 1 W (h W b, II I:I l C lT I 2 l U l.'

(2 [.d lJJi- Q> -

.i.

I. s e L2_ I5 ] I. -~.d Ed. .b.i.] [1d [21__] ' . '_" j I -. '

. i1 f

't g L

( A j [,0 ji (_Z.j[' (3 j() 1010[0l"01 gj(

  • g Y t'  : !( 3'0l:l' m

.&' i ri  ; t'. ,. 4 i r [ 7 r i,p3'ye e  ; p (1] i T_he. upwardg)f t of F2:1 cet reint : w_2 cauced o" 'he f.:ilu 2 er 2 : n2 Q ] l. 21 Je in the flow blac circuitry pc,;er .'upply. ~1.a 3efectice Lice v.1:

[.T [ l l_ r?placcf., Th:s instru:.ent ws ro:111brated ;md re cumed,;c co n ce ithin EE) [ _ 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

E T D L_ ..__._____. _ _

. .. :ss, g,, .

(] ] [Ef l0 l U[ '!/A l [ ((_Surveill;nce Tect g ~

l 'E [_5l f [5j' ' :

  • i_[I[ _

I

[___ E/5 m I oiu 0: o r [_;j ~1  ::/1,

. -V

,, .m

_ .0[ d;' d ,_ hA _ _ _ _ _ . . _ _k.

\\

ti ;

(__ lU. . ( __ I'/A .

s g, ( 'i-* '$

g

'. II!.s -l , f  !

I I'I l !  !

f/t . g fj p'~.u.ne ./

e t,

( s _t _i's) a,.1 1, r;_,._), w l '. 6 . r.. 4 4 s. i _ _ _ . . ___ _. "_4*

2- -

. .t a;s. , a 90 9008