ML20141B508
| ML20141B508 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 03/26/1986 |
| From: | Bailey J GEORGIA POWER CO. |
| To: | Youngblood B Office of Nuclear Reactor Regulation |
| References | |
| GN-822, NUDOCS 8604070050 | |
| Download: ML20141B508 (4) | |
Text
_
Georgia Power Company o
Route 2, Box 299A Waynesboro, Georgia 30830 Telephone 404 554-9961 404 724-8114 Southern Company Services, Inc.
Post Office Box 2625 Birmingham, Alabama 35202 Telephone 205 870-6011 Vogtle Proj.ect March 26, 1986 Director of Nuclear Reactor Regulation File: X7BC35 Attention:
Mr. B. J. Youngblood Log:
GN-822 PWR Project Directorate #4 Division of PWR Licensing A U. S. Nuclear Regulatory Commission Washington, D.C.
20555 NRC DOCKET NUMBERS 50-424 AND 50-425 CONSTRUCTION PERMIT NUMBERS CPPR-108 AND CPPR-109 V0GTLE ELECTRIC GENERATING PIANT - UNITS 1 AND 2 MODIFICATIONS TO THE POWER BLOCK BACKFILL
Dear Mr. Denton:
This is to advise you that Georgia Power Company (GPC) is making some minor modifications to the power block backfill as discussed below. None of these changes have any effect on safety-related structures, systems or components.
The top layers over the in-situ slopes forming the west side of the power block excavation and above elevation 206 will be backfilled with Category 2 material to 95 percent of the maximum density determined in accordance with ASTM D 1557. This area, which is bounded by the coordinates N73+49 to N86+20 and E89+79 to E91+38 and shown in Figures 1 and 2, was previously considered a part of the Category 1 backfill area.
This modification to the backfill is justified because:
o The top layers are above the water table and will not affect the liquefaction analysis. Although as explained below liquefaction in this area would not be a licensing concern.
o The area is above the excavation slopes which are composed of in-situ soils and are therefore not used to support Category 1 structures, systems, or components.
o The area is remote from Category 1 structures and will not affect their foundation support in any way.
/
ganta afb M
A
7 e
Director of Nuclear Reactor Regulation File: X7BC35 March 26, 1986 Log:
GN-822 Page 2 In addition, GPC will substitute up to 24 inches of graded aggregate material for the sand and silty sand backfill as the power block fill is brought to finished grade. This material, which will be compacted to 97 percent of the maximum density determined in accordance with ASTM D 1557, will serve to protect the sand and silty sand Category 1 backfill from erosion and vehicular traffic. Acceptance of the lifts of the graded aggregate material will be based on field density tests made at a depth of 6 inches. None of the graded aggregate material is used to support Category 1 structures. This substitution of aggregate is an improvement, particularly with regard to erosion resistance of the backfill.
r GPC will include these minor changes in a future FSAR amendment. These changes will be implemented beginning April 15, 1986.
If. there are any questions for clarification, please let me know.'
Sincerely, l.
J. A. Bailey Project Licensing Manager JAB /sm Enclosure xc:
R. E. Conway G. Bockhold, Jr.
R. A. Thomas D. C. Teper J. E. Joiner, Esquire W. C. Ramsey B. W. Churchill, Esquire L. T. Gucwa M. A. Miller (2)
M. H. Googe B. Jones, Esquire M. A. Perovich Vogtle Project file NRC Resident Inspector 0053V
j
..e.-
p y
v i
?E
[ g l
gr i
tr T
I N
q
.* ee l
4
==t.
W
.,e J
,. m C
l l
/,Y Q
- 43:9,o.
g l
u A<,,/
l
/*b* *MA. oar l
$**;gkt;m,c.,--..
?::~ ~ /, ;
g.4c: my
,f/"
g 8t'st ;
J
--- q..
~
s....
,4 r VeJ(
" Q Q,.:.s.,-
eW.--
Q7 g-
- 9* =3 l 4.tn: L -
ame.s _ _. _[g_..
.e
- ~--.
l nZ9.u~ %- - ---,., m-c _i
- 7..,MQE d.(O,6E
=-r~= W;^*.m.s..f_ds. a4.~Q.
, eAMW C" /)
~
~ - - '-
./
- - w M h " ' * -' ~--
n yp N 9 fo+ YO O-4.._. f. 'l i I.... M.. j
[b 4._...
a.ff.
3
.. \\.,-
. j
.."a-f............ - -
.I c.
- =. -o h.- t
.. - -.'.i'?,.i,s.q..,
y.
4g
,:,;;;.=,,.-
l t
- =
9
,,i L:.:.. :. r.
i
.s.:.r:-
c.
J.
l-
! f5
- ,/
- '#'~'.,,.....
d.! lN h
.,,, ":'{A.,~- -.
4 a ' ; ?. g.
g; :.,.:...
N hv,/
I
~
- ?
- t f,- {.,
p.,
w u..p.w-
,o
- - _ r ---__ _
- e.,. j
. va.a. es.a._
- y. J.,,.
a 5
.=
. $..w #c...,.,.--
y s
f.f;. p..,;%.,a. :::::j
}
.r
' ',, -:.s.*2 r;,
- r '.
~ ~ ' '
,,. L. a,.*,,.;,,f.. -
<{l ~: ?
l a.
a..
- i.....
.. ~,
..)y +,...
i.,..
-. - ~.-
. y -
,,,1,. a..
3,,-,
i t
i l
s L_
9
._.[
s l e. d; p..f,y'. i. ]).(,j L
=e. &.:,.
t t.;;
9
- o.
s.,.
. >.7 i
- t...g.e,.
g....+.
- m
.i. r
~
pgg......>u... p... - :,r....i - A
- L.
gg
~
3 4,g4 A.-
g)
,
l J
he,;. )...
..I l
a l,,
.r, l
-L'
~I N
l I
g ll
....,, _ a y
.,,..,I I
(
1 r.,
'.N:.......
..I,'.:
,_ {
.9 I
4,. ~.W.'"l
[
3 4
ili t,*..- q ;.=,__
~~
,,1 g
T g.
.aL.*."*,g q
/'.-
c- --,.-
r.-
li
- =."~;.
1
',t I
";..",, f y,lc'.ew
' P*
T[/
/
y g,f ; /
\\
t *. -
- . 0
)[:
p M f-}':- 3..),..
t * * * -.
t n.
~,
w.
d;4--
~4-
... {,.4
(
fa-
). Q. <k.:
t
,-2::::.v..
t ;;;;;;7.
..,4,;m e.p !:-^-e
=
.t 'l,e n [n. XV.r.. -, J e. m' >... %;.. al 4!
i A
s x'2....r.e' W <
s
. t.W_...
L l't.r,._ Q_ C O5= % m f
- %_ts
-y w-
'~
N r7_
... (f.; a.f. p; n;.c, QR,fe.:tr.; r t
l l
lP"" :
P "'*
. j
..j.._..,..;."..
- : tz.*
,;m i, :
- p.. L, i t w..
x w:,
q uwe
- , s.a. y4 s. ic<..
I '. i,
- /.:.
-w-
~
l
.3
. o.
t*
I f~
-i 8
i Fi&uRE.1
s 1
s d
Cd7Edk19Y 2 13ACKRLL @ 95 %
r AT ChodtyO I64 0G " '
/8S'G' 225,gt214of 1
I
'.-_0-0 TENDONGALLERV, QNTROL $ FUEL MANDL/AG
~~
- FIN GR m,
- jrgg,
-~
M / / 7 "/ / - r,,,
1
,,, y 3
g,,,,
2 f
f&
.596+G5
,%_' cur stape QL _
y
.g s 175 f f'
.. wJ L...]
~]
rh
_/== i e-.
htt, @ 97%[
CATEGGeV.I J
(
l fgg w
.,-[
B
, -.LJ l
8 s,
6:
s t
-m
=r m x
o y
SECTION &
w l
l l
RGuRE 2.
-