ML20037A577
| ML20037A577 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse, Oconee, Crystal River, Rancho Seco, Crane  |
| Issue date: | 05/19/1978 |
| From: | Bulter W, Butler W Office of Nuclear Reactor Regulation |
| To: | Reid R Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8003160010 | |
| Download: ML20037A577 (1) | |
Text
_.
G-s
- , -[-
~
~
?-
,,,,sd>J g4
.g,
~
- _ r.
..: ~
~
77 7,,
I; p.7,.
- - -.t
. if,_ - ~ p t.
a.
'7 D
$Y.13 578 s
a...-.. ~.. ".
y-'.,.
f.t.
n
- U,. T.e 3 :
v u
- g_.....m,z.
xw.
o:.
- g. g
- wm a -
"~~?
~
m w
- x.~
+
7.
- , - a g
.~
D$5dj d. Q,(Sg Q.,1 f,'_,
, f m,n-v
' %e:Q i ld W W I K j [:
5 d
R. W. Reid,' Chief. Operating Reactors Branch #4, E
g
- ., S MEMORANDtN F,0R
- u Division of Operating Reactors J-
^
y n-
- - 2;w.in 4
u.-
~
n v.
y n..
~ ~.
W. R. Dutler, Chief, Plant Systc::s Branch FRCI: 9.
3 :;
2ctors
- . 9p.n,cq Division of Cperatt.,
/
al w.
d
'. pcx BABC0CK a VILCOI NOTIFICATION UNDER 10 CFR 21 I
SUBJECT:
" ~
RE:
REACTOR PROTECTION SYSTEM GROUNDING j.
Piant flares: Arkansas - 1 Crystal River - 3 Davis-Besse - 1 Oconee - 1/2/3 Rancho Seco l
i Three ;;ile I 1&2 Dcchet Nu-ters:
50-313, Q,202. 50-3M 50-259/2iv/ tow S0-312 50-259/320 Eabco:k a Milecx (B&W). by lettar dated : arch 9.1978, sub=f tted a report regarding an ita which 3 5 ti believes to te reportable undar the ;. :<fstens of 10 CF2 Part 21. The report doc =ented the evaluation of a a a li concern wherein it was pcstulated that a loss of ground could cause ha "eclear Instru.entatien/ Reactor Prctection System (MI/PJS) of certain 31 'i cuc12cr plants to fail to perfom its intanded
- Also, function. A copy of the. report is provided as Encicsure 1.
certain additienal informatica submitted by B & W ccacerning NI/RPS grounding is provideo c-Enc 1csure 2.
He request that the licensce of che above listed nuclear units be provided with a copyoof these enclosures and that the licansees be requested to
~
review the grounding system with regard to the concern raised by B & W and to submit their evaluation and proposed corrective acticns where required.
Further. if the licensees do not have an ongoing test progra:n to verify, 6
on a periodic basis, the ground continuity of the NI/RPS channels, we teculd i
require them to prc=ptly for::ulata and institute such a test program, i
I b
D**
'3'
! 8f' s +:9 t
'I l
A
- )L R. Butler, Chief.
i fM l
80031600to Plant Syste-s Branch A
l Division of Operating T:cactors l
t 00 rih 73isU C: c ':_ t.
- 11. Ch h 2. s -
i
. ia/5C ' DCR:PS3/C
.... M I
P DCR:
11B COR_:
... E E377
~ ~ ' ~ '
4'c2 0 % ;_pab Dmpt N WRButler f.y4EMa'nhut t
r m.,
OElh /78 05/ ik78 05ffi/78 ISO /m
! '~
, a - c :':
See-next-pag +. _ _. -..
. __. :: f._ _ _
=V 4
- ~ ~ ~
-- - - i -
_ _.. _,. - -. 7. V W Wm xeme. i.v.....:
7.~
. -E. '. -
, '. 5.,. ac m_um. 31_cas.i..xzcx o
-=,*s.
_ _ ~
_ _ _ _