ML20099C985
| ML20099C985 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 11/15/1984 |
| From: | Vandewalle D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| IEB-84-03, IEB-84-3, NUDOCS 8411200142 | |
| Download: ML20099C985 (5) | |
Text
7
,/ -,
3 L,,
4
- Consumers L David J VendeWolle Company _
Nnxiear Lkensing
"~" ' ' ;
iGeneral offices: - 1945 West Parnell Road, Jackson, MI 49201 e (517) 7881636
- November 15,:1984-James G Keppler; Administrator' Region III US Nuclear Regulatory Commission 1799 Roosevelt Road Glen Ellyn,:IL ^60137 DOCKET.50-755 - LICENSE DPR PALISADES PLANT - RESPONSE TO IE BULLETIN 84-03 REFUELING CAVITY WATER SEAL IE Eulletin 84-03 dated August 24, 1984 describes an-incident' involving the failure of-a refueling cavity water seal.with the-refueling cavity' flooded in preparation for refueling and requires a response prior to beginning refueling or within 90 days of receipt of the Bulletin, whichever is sooner..Our response follows:
The Palisades refueling cavity water seal is a passive seal. As shown in attached Figure 1, it consists of a rubber seal which fits over the one-inch
. gap between the reactor flange and the refueling cavity floor. Over t'nis rubber seal is a metal cover which fits securely onto the seal. The seal cover secured by 36 hold-down clamps and centering bolts as shown.
Thest actions assure that any leak due to improper installation of the seal rill be detected before any fuel is moved. The seal installation procedure requires that all of the hold-down clamps are secured and that the centering bolts are torqued properly. The procedure also requires that the seal be leak tested, using compressed air, following installation.
In addition, the reactor cavity filling procedure requires that the leak channel beneath the seal-(as shown in Figure 1) be monitored as the reactor cavity is filled.
Once the reactor cavity is filled there is no mechanism for a serious seal f ailure '. The sealing surfaces are at the cavity / reactor gap and at'the seal edges. Both boundaries must fail for a leak and then it would be a small local leak because even if the complete rubber seal were to fail the seal cover would be forced down by water pressure keeping the leak rate to very low i
- levels, l-The design of the Palisades spent fuel pool and transfer mechanism is such that draining the reactor cavity would not uncover fuel in the pool ~or transfer tube. Only fuel in the Refueling Machine or Service Platform would be' subject to being. uncovered. However, an analysis assuming complete loss
$hh20000h5
- OC1184-0004A-NLO2' PDR el
g---Q y ; y
- ~-
gr m.
L v.
~,
r
.e
^-
W. e
_ -:3 5
[JGKeppler/ Administrator 1 T
l Palisades Plant ;
2_,
4
> RESPONSE TO IEB-84-03 '
'I h
3Novemberf15;U1984 1
fNi c
-l
'.'of: the rubber ? se'al' and' seating of' the seal cover? shows, that potential refuel -
- ing cavity water seal leaks would be well' within'. makeup capabilities. dNo --
~
V changes:to existing: emergency; procedures'areirequired to address ~the concerns a
of this' Bulletin.
i
.y M
a idfJ andeWalle :-
' Director - Nuclear-Licensing :
< CC Di ector, Office of: Nuclear-Reactor Regulation
. Director,' Office'of Inspection and Enforcement:
yNRC Resident' Inspector - Palisades
' Attachment-9
)
('
i w
=OC1184-0004A-NLO2
~
w, L,,.,.
,,,re.
y v--
M'.
p,~ -
gy
- y. 3:T LN; a
~
%;p ; ~ N 3-A ~%
},'
y y
e i
-)'.
L-3 r
s
. CONSUMERS POWER COMPANY.
Palisades Plant
.- f.
. Docket.50-255;-? License DPR-20 i
REPONSE TO IE BULLETIN 84-03'
.At!the request'of-the Commission and' pursuant to the' Atomic Energy?Act ofJ1954..
7
.and the Energy Reorganization'Act'of:1974, as' amended, and the Commission's-
- Rule and Regulations thereunder, Consumers _ Power Company submits our responsel to IE Bulletin 84-03 dated August 24,M1984, entitled,-" Refueling Cavity' Water..
._ Seal." Consumers Power Company's response ~.is. dated November: 15, 1934.
CONSUMERS POWER C'MPANY O
k R B DeWitt, Vice President NuclearLOperations Sworn and subscribed to before me'.this.15th day.of' November 1984.-
I L(A SherryLDurby, Notary: Pub [ih Jackson County, Michigan My commission expires November 5, 1986.
J SHERRY LYNN DURFEY Notary Public, Jackson County, Mieg.-
i My Commission Expires Nov. 5,1936 OC1184-0004B-N502
- WW ~mp6 m'
tw n.: "
n-M g:,
sn
.:ew
~
p e-
. +.,. ~,.
.w
-r,
x,,
- r.n
..n r
y sw. e
- ~?
y w.. ap.
.s
,m
.. q.y -
v cpN, w
" #?l&gg t
- x_.
.g,..
~
,,l
- '!!
- .3 s
, ;' M y _, Y (N T ' '
'L
~~
' ?, ~ g.
.,. g,.,
.y', 4 3
77.o.
'. q w c --g 7p y y
y,
~
' %^
-405' W
K, a
y.,
,g s
x
-w'-
t--c.;;.,
, \\. - i..,
g q,i.
_.- _ j
.- :.w
,C f t;
-jg.4
.i*'
-4 7
L
).
f h'$
'h s n 'j 'v,,
r
\\
's
.'A a._ '
/
, s.
s
,,.u mw s
t s.
i ~
a e >,.
+
$ %'N T r
E^*f y
._y j, l jiQ 4
sef;,.
'l',
Q_ *.- y. p.,n..
(
_y, cc s.L.a: >
f y:'
- w
.r A (v...
+
, < c,,f..v
+
r i
~"-l.
s
~.p.,
1 w:
,s
.,7..
m t.,
3 e
o
. },
.c 6
- t,g
, +
~
e
-n3_
m, > m-v-(
s., p7'
,n. ;
z,; ;;
?
x
. :E +. >
4 9
s s
~34y
- ';f.
3 z
'h
-k '
L i "'
(
Q -l. ", s
+
= ',
a t
....,. ;m
- 9 3;
p
,.v.
g s
- :.s s
'I'$ }
p,
,. '~
o
+
gz z 1
. b e 2.
fdj
). Q i[-
' 5
.s' 43
- g
.! d 4 M.'s r
t o,'
s m
1 1
m s
g.
p
. 3 t
h 1,
F
[
L
^
~
'h ' '
^ '.. '
'N^-~
< 'y e
y
. ~
r
[ q _j i
A a,* : _ p.;
s
< m s
~
~.
5 k
-?
E
_ -. g.
t p<
p.
p 3-
t e.
[ '
g.
" 1l r
,..,y,
^
- ~
J 4
s L:"
s r
s
, i
! ATTACHMENT.1' s
1m t
- )
".g-
'A.'
Y"_
Consumers-PowertC'mpanyt..(, ". _
'.Q o
q';
~
Palisades Plant
.Dockett.50-255D =s-s M
g.
._4_
4 m
~
..ly.
i 1 RESPONSE TO IE" BULLETIN:84-03 y
d
~ ~~
a ~
1 REFUELING CAVITY WATER:. SEAL I
FIGURE 1 i
y-7 W.-
{-;
y.
e a
o
/
k
.c'
(
v V
i.
q-o; f'
sR r
6 3
I
-I
+>cc:
h b
'i k.-'
- s s
1 R::
1-Page 9
J.
-)
1 O.;.
- <D' TOC 1184 -0004B-NLO2/
d a
4:
- 5,
t L'
b d
j-.- -
y 4
-d
'}r.
~
[
Ng 'e V
N d' M'.R f
5 Th M
j
g l
PALISADES RZACTOR CAVITY SEAL 5
J J { :}-
L ' j -l'(".
h If f f.!
' h l
/
l l
/
t i
i i
=;.-
t
. {_ l
' i. l
.j.
I ww
/
~*
f/N///////////7//
/,'
Il 7
i m'm rmj
!l A,
w r-j I
l t
1 i
.t i
1 l
! '1 W'!
.I DEC)<.
)
4;j 4-1 -+
REE 1
.,4 i
ll
.R$ ACTOR VESSEL R.ANGE Il.
REF Il i I i s lf D
- lO GAGE REW 1.
Seal Cover b.
Hold-devn Bolt 2.
Seal 5
Center Bolt
=3 Hold-down Cirq
Reference:
950Y2hk." MI-33 Sh 678-1 and Sh 170-1
..-m=
--+=,_e v
.w
,e-
-w,.er--=-
%.v ew=r.ew r-.
--