ML19345C182
| ML19345C182 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 10/29/1980 |
| From: | Paulson W Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8012040081 | |
| Download: ML19345C182 (30) | |
Text
-
.n.-
pa per
+i k
UNITED STATES
_E NUCLEAR REGULATORY COMMISSION o
g rl WASHINGTON, D. C. 30555 October 29, 1980 4...../
n 7
wm d
G
-Docket No. 50-219
^
e sca
.n.
c: n CG n
LICENSEE: JERSEY CENTRAL POWEP. AND LIGHT COMPANY (JCP&L)
IW s
N FACILITY: OYSTER CREEK NUCLEAR GENERATING STATION W
g
SUBJECT:
SUMr%RY OF MEETING HELD ON OCTOBER 21, 1980 TO DISCUSS JCP&L's
'l PROPOSAL TO REPLACE THE OYSTER CREEK CORE SPRAY SPARGERS WITH A NEW OVERHEAD GRID SPARGER DESIGN On October 21, 1980, a meeting was held in Bethesda, Maryland with repre-sentatives of JCP&L and their consultants.
A list of attendees is enclosed (Enclosure 1). The meeting agenda is listed on Enclosure 2.
The purpose of the meeting was to discuss JCP&L's proposed new overhead grid sparger design.
Scheduled inservice inspection and subsequent tests of the reactor internals during the 1978 refueling outage at the Oyster Creek Nuclear Generating Station identified and confirmed the existence of a crack in a portion of one of the two core spray system spargers inside the reactor vessel.
Action was taken during the Fall 1978 outage to strengthen the sparger at the crack location by the installation of a mechar.ical clamp assembly.
During the 1980 refueling additional cracks were discovered by a signi-ficantly improved proced::rc for inservice inspection of the spargers.
(Itis not known whether these are new cracks, or previously existing cracks that were overlooked during the 1978 inspection.)
Our Safety Evaluation dated May 15, 1980 concluded that the proposeal intarim repair of the spargers (addition of seven clamp assemblies to the uppr r Sparger and two clamp assemblies to the lower sparger) is adequate for the present t.eidi-tions of the spargers; however, we concluded that the licensee's design of replacement core spargers should be accelerated ar.4 that the spargers should be replaced during the 1981 refueling outage.
The new Oyster Creek sparger design is based on a design used in a foreign plant. Sketches of the new sparger arrangement are shown in Enclosure 3.
The General Electric Company is the primary contracto: and MPR ~ Associates are design consultants. The features of the new sparger design as stated by the licensee include:
e 1 Spray Nozzle Per 4 Bundles e Water Supplied Through Existing RPV Nozzles Internal Piping Replaced With Flexible LPCI (BWR Mark VI) Type Coupling e
System Supported by Sandwiching Betweer Shroud and Head e
-e Has Internal Disconnects e Face Seal with Spring Loading e No Significant Effect on Reactor Performance The licensee indicated that they intend to conduct a spray test program, demon-strate vibration adequacy, and perform hydraulic tests for the new sparger system.
s onooo 09
,. JCP&L indicated that they intend to make a formal submittal in Decerber 1980.
/
bo
' bl% JfW' W. A. Paulson, Project Manager Operating Reactors Branch #5 Division of Licensing
Enclosures:
1.
List of Attendees 2.
Meeting Agenda 3.
New Sparger Arrangement Sketches cc w/ enclosures:
See next page
Mr. I. R. Finf rock, J r. October 29, 1980 cc G. F. Trowbridge, Esquire Gene Fisher Shaw, Pittman, Potts and Trowbridge Bureau Chief 1800 M Street, N. W.
Bureau of Radiation Protection Washington, D. C.
20036 380 Scotts Road Trenton, New Jersey 08628 GPU Service Corporation ATTN. Mr. E. G. Wallace Commissioner Licensing Manager New Jersey Department of Energy 260 Cherry Hill Road 101 Commerce Street Parsippany, New Jersey 07054 Newark, New Jersey 07102 Natural Resources Defense Council Plant Superintendent 91715th Street, N. W.
Oyster Creek Nuclear Generating Washington, D. C.
20006 Station P. O. Box 388 Forked River, New Jersey 08731 Steven P. Russo, Esquire 248 Washington Street Resident Inspector P. O. Box 1060 c/o U. S. NRC Tons River, New Jersey 08753 P. O. Box 445 Forked River, New Jersey 08731 Joseph W. Ferraro, Jr., Esquire Deputy Attorney General Director, Technical Assessnent Div.
State of New Jersey Office of Radiation Programs Department of Law and Public Safety (AW-459) 1100 Rayaond Boulevard U. S. Environmental Protection Newart, New Jersey 07012 Agency Crystal Mall #2 Ocean County Library Arlington Virginia 20460 Brick Township Branch 401 Chambers Bridge Road U. S. Environmental Protection Brick Town, New Jersey 08723 Agency Region II Office Mayor ATTN: EIS C0ORDINATOR Lacey Township 26 Federal Plaza New York, New York 10007 P. O. Box 475 08731 Forked River, New Jersey Commissioner Department of Public Utilities State of New Jersey 101 Commerce Street Newark, New Jersey 07102 i
LIST OF ATTENDEES.
MEETING JCP&L & NRC - OCTOBER 21, 1980 NRC JCP&L W. Paulson T. M. Crimins J. R. Fair R. L. Lorenzo W. Hodges J. Meycizelli S. Sun James Knubel H. Balukjian K. Wichman BECO S. J. Weems J. M. Fulton R. A. Hermann J. W. Nicholson C. Y. Cheng MPR ASSOCIATES GE W. R. Schmidt R. G. Furgeson J. Mancinelli J. G. Erben J. H. Oates i
i l
Enciosure 2 MEETING AGENDA JCP&L CORE SPRAY SPARGER REPLACEMENT OCTOBER 21, 1980 I.
INTRODUCTION J. KNUBEL/ NUCLEAR SAFETY & LICENSING A.
1978 AND 1980 SER'S B.
COMMITMENT TO INSTALL NEW SPARGERS C.
DECISION TO REPLACE INTERNAL SUPPLY PIPING II.
CURRENT PROJECT STATUS J. MANCINELLI/ GENERATION ENGINEERING A.
REPLACEMENT EFFORT B.
CHOICE OF DESIGN C.
DISPOSITION OF EXISTING SPARGERS AND PIPING D.
DESIGN CRITERIA FOR NEW SPARGER III.
OVERHEAD GRID SYSTEM W. SCHMIDT/MPR ASSOCIATES A.
MECHANICAL DESIGN B.
IMPACT ON EXISTING REACTOR DESIGN / PERFORMANCE C.
DESIGN QUALIFICATION D.
SCHEDULE IV.
SUMMARY
J. KNUBEL
A).
REPLACEMENT EFFORT PROJECT (1ANAGEMENT 4
JCP8L GENERATION ENGINEERING DESIGN CONSULTANTS PRIMARY CONTRACTOR MPR ASSOCIATES GENERAL ELECTRIC i
DESIGN TESTING FABRICATION TOOLING AND INSTALLATION i
I l
l j
l l
J 4
u a
IN APRIL OF 1980 JCP8L REQUESTED GENERAL ELECTRIC TO PROCEED WITH TWO PARALLEL EFFORTS TO REPLACE THE OYSTER CREEK CORE SPRAY SPARGERS AND THE IN-VESSEL PIPING.
i A.
DIRECT REPLACEMENT B.
OVERHEAD GRID DESIGN s
a_
e e
p w-
}
B.
CHOICE OF DESIGN FOLLOWING AN EXTENSIVE INVESTIGATION OF BOTH ALTERf1ATIVES, JCP&L DECIDED TO CONCENTRATE ALL FUTURE EFFORT ON THE OVERHEAD GRID DESIGN, AilD i
IMPLEMENTATION, DUE TO SIGNIFICANT DESIGil ADVANTAGES 4
MAlli ADVANTAGES STRAIGHT FORWARD, CONSERVATIVE SPRAY DISTRIBUTION REMOVABILITY REPLACEABILITY MINIMIZATION OF IN-VESSEL IllSTALLATI0il TIME
6-5 i
C.
DISPOSITION 0F EXISTING SPARGERS AND PIPING
\\
THE EXISTING SPARGERS SHALL BE REMOVED.
i l
THE INTERNAL PIPING BETWEEN THE:RPV N0ZZLES AND THE SHROUD SHALL.BE REMOVED.
i THUS PRECLUDING THE NEED FOR AUGMENTED ISI ON ABANDON HARDWARE AND NULLIFYING THE-CONCERN OVER LOOSE PARTS.
J T
4 l
0YSTER CREEK OVERHEAD CORE SPRAY SPARGER DESIGN CRITERIA SAFETY ESSENTIAL 2.45 GPM/ BUNDLE DUAL SYSTEMS - 100% REDUNDANCY OilE SPRAY N0ZZLE PER 4 BUNDLES MINIMUM IMPACT ON EXISTING INTERNALS AND REACTOR OPERATIONS REMOVABLE FOR IN SERVICE INf,PECTION WATER SUPPLIED THROUGH EXISTING REACTOR PRESSURE VESSEL N0ZZLES MATERIAL - TYPE 316K STAINLESS STEEL OR 304L w/.02 MAX CARBON e
. =.
e OVERilEAD GRID SPARGER DESIGN I.
DESIGN CRITERIA II.
MECliANICAL DESIGN FEATURES A.
5" SPARGER WITl! 3 ]/2" CROSS PIPES B.
ONE NOZZLE, DIRECTLY OVER!!EAD, FOR 4 BUNDLES C.
INLET' PIPING ARRANGEMENT I
4 D.
INLET PIPE SEAL i
SLIP JOINT OR FACE SEAL I
E. SPARGER SUPPORT RING SANDWICHED BETWEEN SliROUD llEAD AND FLANGE o
~ OVERHEAD SUPPORT GRID e
e h
4
+
.-e-v.
c-2 pgg 038%
mse csex wa SenAYSPARGER DEstc i CRITGIA e ammesse m e 2.45 C4 2 u E e DuAt. Sysics - ICT. Re:mcr e Ote SPRAY'I M : FER 4 EL?Ct.ES e MItem Ie.=AcT a: ExisTIts Itaswu no REAcTea CesATras 4
e PE'GVAELE FG EEPJ-3.ItG NO STCRME I
e WATa SUFFue Tsa.m ExIsTIrs REAcTea s
Passsuas VESSEL ibn es e PATSIAL - IYPE 31EL ca 315K STAIM.Ess STEEL m 304L w/.02 Tax CAsam CAD - 8 8NM
)
4 ye a
L f.
f L
6 o
c.
=
A
$5
?d
?a r
R h*
Oa l'o2 a.
N o
==
l AO TO S>
23
-- 1
, m I
5 e E 5 5 g r, ~ u
- v. y
[
/
_i
/_
d eu@
D l :
=
E U
a m
5 Y
.2 A
5 C5 Of; 5
ee q
g l
2 6
O I
e b
em E
$2 E-l !.M ll
~'
l,-n se Us
~
i o
b of x
a.:
9 3
o g
l 8
v
$a 8
8 t.s
%/
wG O
O g
ss e
I
e e
M a 2 %L h
e n
a-g st:
9
- g et, tu D
Ee 2
gg f *"
' /,**,
..\\,
gm, ~ 2.,
C7,qq cy?g D
- s.. o e4D ego
(
i
\\
=,:
Mc%Lo 'h, edD Ui 6
i G;M Y
No
-l9 e a '-
j 6
L i
G r
s g
htT~ N i Z+o d ? G
- ~~c7 ? 4
- ~d ' s %.,.
E
/
- %D
- %D
..%D e4D of
. ;.=
~
?
D
%D O
QO
=
=.
f_.T
..MI'4
,'-~
ph~NDdM 6D d I*o GIT
(
i I
i OQo e
~
who l
41D f
--.'.4 j9
%{D A.r _
,i, I
I
- 'k3 1
(,
3 hhg 6b-sk3 b1 b (7 CO e
O I
Q.$.r._
kig/>
i Opd i
8 P_s
%p'd i
R g ')
{
,7
, 86
=.
'..% j_'d
-+
=. ~. +..
==...
N
.h h
%f,_
ch9
.&_ 9 a
=
.=;...
j.
J O
E O
D D
44 N
=.-
A A
A
- f,g
' M dIt diD dit d?D i dN
/
}
fD hiD hiD
%:D
- %LD f/
fo l"4}o h do @ wi 6
'~
,e
=
.. ~
,D I
6 Q
l h
Q
.J h
5 4[4_fj
-_e-MS N.. %..
_, /
y a
~
L
PD**RD *AD'TOiPIas ta h se a m c a:3 s
x 3
N eS, gs Ys
(
Ss av 8"
l]f 35 i-a y
' p'X X-xw f
v vv v
',; %v v
9%
d%
Jh d^
6%
~
O k
/
0
\\
fpp X X,Vw X X X;
a N
i y
m, ee y
y no co G
4 y
u-a I
Y
.y,?o Y
Y Y,
Y~s 6%
6%
d%
o 6%
a a
'b 5
2 $
X fX X >U s.
e N
8 R
.o ee v
,0 9 t
09*D "D
l' T.
d JSJ eJ A1 m
O'
<o w9
% co l
\\
8 I
l d
e o
GC
?
00 1
8.D e
d 3
?
c o
L:
~y~
d 4s GC' a
=
' i.
~
f l
l /[ W m
m e
hu 25 tuu 00 l I
??-
50 3
- g l
- !((
D M
!{
g p"
in
<#3 I !
3s cx s-no i
o
_ _ _, 0 5
( i 1 g
a E.
s v
O k
h i.
s hR N
si
\\-
.e
. e Q
{
h WW C
J
?
1 tal Jgs E
e a
ss u
- )
="
~
>s
.:E s
s8
'4' O
o W CO uk D
E
_z ".
om 3
a zW
> ED d 5
5>
h U O g
=
w t
a Is
- a j=
wS E o
m e.
e-w o WA k
ww o _<;i g
. a 9'
si o=
w n,
e O
ww a
's t
- o w e,
g i
U 4
oj
=
c o
o D
e, g%
e om e
,h O
W S
O D
t o
wa 3
D J
g O
s g
f
\\
s o
k 5"s E$
'w W ~f Jl O ?.
?
u s
y!.t, M- ~ qD e
e J.
'h
- n O
C "a, zR v,
b g
,1.-[l.,aP wQ'M wh.ighjj wu g=
20 t
j UZ
@O i_,
s q
- w. u,s.
.e.
s h
'i h ffs,
[ Ibk5@-i!R4[.2 i j:p'.s
- s : h '#."'4's.'!.6 / * 's'4U1M.Of-d%'N'.'h 8
i g%4,
g C
_ _,,,h!
j f>wwh 8
lll h_
C e
z35$
ov
,1 l
y
/ [idi ii. ~i i
I stM;
[
[
Es
?r fess TO O C3 f
w*
J
- U Iz e
Og
- or o o
w um c
I4 W Ohg $
ow OW O
006o O r
g E
J m
cw g
o n
-o me c3c6 e o
W iti W
20 z
ww e
De Eo g
u WO cd N
V ww
,j o E
J gu W
tt o 0
O'.
e O
>d 4
gU e
3 w(
ua W
W d
%o
- M MD o
o U, *< E$g m
g
.g 4
- 3 a
s
- e sa um o
g n
sd "i
6 1
E_?_
d 4.
i o
w
<w c*
- C L* 3 a
wwo o*
d
)
o w
a sax Q
\\
jf U
h,um4
..h.:\\I/9;b[6Sf,%
- ~. vf
.y,v,,,
O i Gl E
~_K
[ ?s;\\;m A y "
\\%_.r)
O ane 8
t
.p e
l e
.}
l ~%v o
E c-.,
W C
- l'
'/
J l
E 2
m e
a.
c
=
W G
a i
g g
z E
r, n
8 w
s n,
5 m >
~
]
U, a
a<
..)
A
\\
\\
2 n
o y.. 4 s
/:, -",l 1
1 s
s g
N-:g.,
c c
c
).
d 9
I
\\'g y
e yI 1%
' /* f
,I
'E..' 9\\
N v
2 Xs g
t j
g I
)
cU i
8
'., gl,,
sg e
3
)
L O
C
/
Trv 2<
]
y 6
e 5
a i
0 3
d5 Sox C
a~d A
o g
- gk w
a y
E See E
u y E
fig U
M Uu W
?.
i O
4 s
ww$
,E
- =
s G
{
528 i
4 '-
~
c9 wA
- 1 1
W O
O y
z D
o 4
O h
fu O y@
at m
rz O
n o
$U 9<@@3 9
b 3
1C d
O E
O D
W*
8 Jgs m o
G D v' '0 <W X
t-H
. G CD o
o m
O w
m
@HOz ct O
y w
O m.
O a
.Ero l
tv-O O
e O,0 Ch I
WWDu o
O 0
C 000o wEa 5=====d m
O z
==
w O
m
_c O
O 5
HJ
.f, o f
0
<OLH g
p====s 220<
W 3 o c===
~
m.
N b
5.5 l
l
/
m*O
" b. -
s s
{
O[
/ \\ OT i
N z:
/,
/
b.
2 c<O-i 9!
s:
E_55
, e \\
\\ [, /
e j
w
$N,...
s,mo).
k 3,
~
p======a
.=
=
w l
E._=====
=
03 s
\\
l
)
WC J
W g
c o
J oC O
O 0 0-zm O
O o
h U
O b<
m_ g 2
n X1
~
O WW D
VC vC O
E O
e*J'
,e O
)
,1 a.
l i
1 1
040 I
Cl 7.393 OI A.
r 5.053 O! A.100 END OF INNER SLEEVEi A
~xt
'l 4h i
N i
.500 T Y P,
!]
5.563 Of A.
l ra-VA:sij N250 N
$$i e
en 5.000 OI A.
.750
, U!
ST Et. LITE H AROF AO!NG g' "' I TYP.
BOThSuarACE5 tM p.
a ve 54
)
i.
id
--- 6.f 43 O! A. (10 END OF OUTER SLEEVEl 4
D E T Al L C_
60.D - 2 z.
fr 6 8'O
%y._
p-wy--
e w g
..~,,
ggph 4, JLL3LA[
9 9 70 %l0 ~D
. o' J
=
X N
\\
O M
W c
~
I h
X1 o
I W
2 z
G
'L N W T3
~
mO c_
U N@
'U
~
d 00
'o
=
mW z
Om W
.W
~
W g
.O 2
go 00<
00-k
[
1
'R t0 W Z O'N
& D O
O C
~m j
.D tn
-I N
N
- J -- -
't Ws
=
=
O HQ D
O tO LA CD 4
O m
3
-.h -
=
=-
i N
A mssssss wm s
,i VN i
d V B G G GV///j/
If N' wsomsms.
c
/
v
/
/ u,
\\
'g 1 WEW, L.
.de A 3
/
?
/
o O
.O O
C O
O W
~
o J
' q
=
=
g C
~
I O
H O
O w-O O
Z 3
O W
m O,
g tn
-a O.
LD
~N t
,0/*
a s
u i (
11 4 1Lb oW-t 5
3 3.
~
'V 5-e 8
- e. 5 (Y
o N).s1
+
i uJ t
h 8
A t
i
\\
E
~
^
\\.
s 0,
\\
\\
0 k
U G.
e.
I, 3
~
/x\\
2
\\
2
\\s/
Z s
\\
s x
\\
\\
4.
i l
o'O'~s b
QC Q
rl Ft i
8 i
. dl j
f oo o
o 0
4 G
u J
m 6
g 2'
S E
E u
E s
~
s w
a
~
g l
)
.I l
t 4
// / O
(..
j m
% rCh, I
=
i' a
v) i IW:
i Fy l
u u u s
1 u
se
$5 D
8
/
9 8
2
/ 4 A
u
/
u i
DND
./
E ul y
v
/
s j
NDsM 3
t l-z N-I a
1 0
t.
y'/,h,.
p.
[
-i 3e m
D u
p.
t.
s E
d
' N 5
s:
5 m
g y
Ys s e%
W\\ ?
l e
e a
e
o*J' o'o o
g J, c c Ju c Ju.
c 30*
- m m.
l c;T ~'3g~ico 4
\\
l fl 9
f
) c'.\\
[
/9 k fG btlb-d ll y3 a
/
=
a p ij g
e j e: 'o e:
/
t-j
(
4l
\\
{
O l
Mt l l _%
Ihl
._ _ _ _ {l _
\\
C
]
s-
\\a KI Nr I }o c J
li m/
- s c
us oa E
/
/
)) lll' @ 6 )
ok>{e']lllOh If e
R
/
w:h cal N"
I 270*
_ SPARGtE:R SuPPoA.T
- PLAV bm 3-(.-Eo 1
n,
- J'o.
III.
IMPACT ON REACTOR PERFORMANCE A.
SPACE IS AVAILABLE B.
INCREASED AP (<0.8 PSI) ACCEPTABLE RECIRC SYSTEM FLOW SilROUD LOADS IlYDRAULIC STABILITY ADDITIONAL WEIGHT REGUIRES REEVALUATION OF C.
SEISMIC STRESSES IN SliROUD NOT EXPECTED TO BE A PROBLEM i
f
SUfTARY_
OVERilEAD DUAL SYSTEM SPARGER IS FEASIBLE 1 SPRAY fl0ZZLE PER 4 BUNDLES WATER SUPPLIED THROUGH EXISTIllG RPV N0ZZLES INTERNAL PIPIflG REPLACED WITH PROVEli FLEXIBLE LPCI TYPE COOLING NO SIGNIFICANT EFFECT ON REACTOR PERFORMANCE SYSTEM SUPPORTED BY SANDWICHING BETWEEfi SHROUD AND HEAD HAS INTERNAL DISC 0NilECTS FACE SEAL WITH SPRIllG LOADING 9
l 1
.-...-....=
. ve..
i SPRAY TEST PRdGRAM P
i MODULAR SPRAY TESTS OF SEVERAL NOZZLES s
A.
ONE NOZZLE FOR 4 BUNDLES ONE NOZZLE FOR.ONE (PERIPHERAL) BUNDLE B.
TESTS TO BE PERFORMED IN STEAM 1 ATMOSPilERE 2 ATMOSPilERES L
4 ATMOSPHERES L
l 6 ATMOSPHERES i
7.3 ATMOSPHERES s
h 1
4 6
1
+
f I
i t
l 1
, ~.
r-
.....r,--
.v-
6 a.v..
DEMOf1STRATIO?! 0F VIBRITION ADEQUACY A.
VERY CONSERVATIVE DESIGN CRITERIA (STRESS < ]O,000 PSI ASSUMING
- MAXIMUM llYDRAl" FORCES NAT' L FREQ.
TATION FREQ.
2% DAMPING:
ALIFICATION)
B.
DETAILED ANALYSIS C.
IN-SilOP LOW-IMPEDANCE VIBRATION TEST TO DETERMINE ACTUAL FREQUENCIES AND M3DE S!! APES AND CONFIRM ANALYSES 0
9
. so..
ilYDRAULIC TESTS A.
FULL SCALE FLOW DISTRIBUTION OF SPARGER B.
FULL SCALE FLOW TESTS OF INLET PIPE COUPLING INTERNAL DISCONNECT SEAL e
0 e
9
4 ME 1 h.
D'009 b_b _o 4'd -
s r
3 G
U.,n..?.._
.e o..
r e
d
')
- 4.,~ ?,
o 3
.n
__ q.M _ :.,
., 'o _
Q a
s
- o k
f c
cdd 2
- A?
=
s a.. s N
d4 !!,.
n 3
pT
- .,.w 3' c.V w' =
.h h h er 7
- f a
b' O
h N.s
.a
.k Q
1 e
b
%. *h h4 t;
,...$,('
e fl
._s
.;J~.4
.i l
...b.,
4 e
4
.g s
A O
p 3
2 5',
s' ::
5 In '
y j
22 2 0
'2 y
w p..
w.
N' Nl J
?
~
..T A_
d
}
r m
~C 5
2 3 g
N
- ?
E m
=
un wl u
u c-w U
N, 4#k d
= --. --
1_
3 g
5 sl,r l
x SD
@1 0
=+
45 o
v a
N N
3 i*
D..
2r 3
3 N Cl c
gu r
i
.2
- 3" e4 b
b 5-n 2
E t
J Y
k..
a 4
O d
4 O
M C
i:
wc
..o
-~
- 2
.E 4