ML20037B906
| ML20037B906 | |
| Person / Time | |
|---|---|
| Site: | Humboldt Bay |
| Issue date: | 12/01/1980 |
| From: | Crane P PACIFIC GAS & ELECTRIC CO. |
| To: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| IEB-79-26, NUDOCS 8101120252 | |
| Download: ML20037B906 (2) | |
Text
,
'"o%.$
o rn e
c">
V'.
DAC*7 T_ ^v f".. 1 O 7_ __ "f"_7i C 8717 T C 4C. 'O 1 D_A'.
V '. '.
. _ ~
"J*.a.~.:.
c2 iG ;,
., r.f,q. --'y.. <. n. y.,[;;;.m m.
e r-n,
- a...
knecwron me.:n3 c3
-4
_._-..,e_
_1,
,.o m,o
. n.
9 ' & ;,,
f u n 0._
m m.
m.-
m.
,x.
noncar - 2: -
.7 u.
g;s.
c ~
.a s v
....4 u...
m...,
~
-e=<.
.m
>=~.
..rg
~,.
e-...
3,
~,...
~.,
s y
+
x...
. 3
, 3.,.,.s-m..
ve..,.
m;
" * * ~ " "
I'r. R. H. E'ngelken, Director
- c. _ _c : _ --
a
_,, a
-. - -.m_-_-_.i m
m
.s.
--..-.m
- p e*
..__.__r
..~,.i.-,-.
L'..,.. a _, c.y L.. -.
v.
~--v 1,? C,.1,
.'.,.7.;*.......,,
-tm,m
- s. m
.. p ;, -..
c,,
m.
u
..~,T..._ <. -..,., L-i _, ; :.,J v.
m flc. ;C t..O. 5U-133
._ li n ' i..O.
L r N- /
^.,,
s.
_.-.3..
u _ ;c er.x ca icar lec;cr c.ated Aucust 29, 1930,
.irc.;.. - __. -. c _ _ ; _.1.o.
.a,
. ~ zicion.t., concern mg cne g
c;n ma,aa.
uu 1monatica requestou is
. ~ _.... _.. _. _... _ - _.. __.
c -,,.u -w w a a; t....e re,. ic,a
_ _ _ _ _ _ _ -...,.. m.. e w,,
x.. -
i
.:. c.,. n....,u,,.,
p n
.a s'
/ i
/
f.
J
/,'.
//
i
/
/
/
I 11:
(
/
.;u/
q Q
G
(
s
-mv
/
i
?
v._,... _
/
- a., -..
a.
of fice of Ic ' ectica.mi P.n rarcurenc r a. s ' of P.uctor &eratiana En y ctica
. :lar s p:latc y Cmriinsien 2
Ma, D. C. 20555 Co; tant : uuac. nit Branca U.
. :uclear IbJulatory Ccanissica
'Nain, ton, D. C. 20555 1/0//Lo252-EfN
";21C '
'.C
';D ELF.CTRIC CG:!PA'.'Y
~'
lic;;c.o!.DT ". AY PU.?ER P!./d;T 1: NIT NO. 3
^
- 7cket No. 50-133 License No. DPR-7 lGTACHiENT A RESPONSE TO I.E. SULLEfIN No. 79-26, Rev. 1 DATED AUGUST 29, 1980 1.E. 3ulletin 79-26, 7evisica 1 concerning boron loss from Ek'R control blades. requested rhnt
..e provide a written report describing our findings relative to the follcwing items:
1.
"The operating historv of the reactor is to be reviewed to establish a record of the current 330 depletion averaged over the upper one-fturch of the blade for overy control blade; the record is to be caintained on a continuing basis. This action is required on all reactors whether shutdown for refueling or operatig."
Cur creratinc history has been reviewed and a hand calculated conservative estimara or tne current s** deoletion established for the upper one-fourta of all the reactor centrol blades.
k'e will refine the calculations and maintain this recora up-to-date following the resolution of the scismic issue ana our suosequent startup.
2.
"!dantify any control 'olades predicted to have greater than 34 uepletion averageu over the upper one-fourth of the percent a*
blade by tne next retue11ag outage.
2.
tescrice your plans for replacement of identified control
- laies.
acasac.;..nch you plan to take justifying continued
- scrt;.e aexc refueling specifically addressing
> arac ca, cas..
.ae otuaes.ith greater than 42 percent depletion averaged cv upper cr.u-icurth of the blade; and (2) the condition
.... -.~
- here you.ini 3reater than 26 percent of the control blades greater than 34 percent depletion averaged a l c u i r. t m. to aave upper cne-fcurth of the blade."
over ta; 10 mee. ;;
u_
c;.;. utea to have q;, eater than 34 percent 3 r :: ~rcent of the 'olade have been identified by
... 'r $
w our
.ervativ : hans calculated estimate. Plans for replacement of thee ;1ades have not and will not be established until resolution of the
-*sent seismic icane ia determined and a nore precise calculation is ". formed.
Following the resolution of the seismic issue, we will inform you of our plans for blade replacement.
pres. nt ly :.hutdown and must remain shutdown because of Since v.- are license requirements related to the seismic issue, Item 2.b. is not a;.p t icable.
3 / '.. Je will propose a schedule for perforning the tests and examinations specified in Items 3 and 4 following resolution of the scismic issues.
t