ML19309G075
| ML19309G075 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 04/07/1980 |
| From: | Wiggington D Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8005020319 | |
| Download: ML19309G075 (4) | |
Text
80050 9 3,%7 Meeting Summary for Beaver Valley 1 APRIL
- !300 Docket Files NRC PDR Gerald Charnoff, Esquire Local PUR Jay E. Silberg, Esquire ORBI Reading Shaw, Pittman, Potts and Trowbridge NRR Reading 1800 M Street, N.W.
H. Denton Washington, D. C.
20036 D.
senhut Karin Carter Esquire R. Tedesco Special Assistant Attorney General G. Zech Bureau of Administrative Enforcement B.
r 5th Floor Executive House j
Harrisburg, Pennsylvania 17120 L. Shao J.
le Mr. Roger Tapan p,
))
Stone and Webster Engineering T. J. Carter Corporation A. Schwencer P. O. Box 2325 D. Ziemann Boston, Massachusetts 02107 P. Check Mr. F. Noon G. Lainas D. Crutchfield R & D Center
- 6. Grimes Westinghouse Electric Corporation Bt:1 ding 7-303 T. Ippolito R. Reid Pittsburgh, Pennsylvania 15230 V. Noonan B. F. Jones Memorial Library G. Knighton 663 Franklin Avenue D. Brinkman Aliquippa, Pennsylvania 15001 Project Manager OELD Mr. John Carey, Director Ol&E (3)
Nuclear Operations C. Parrish/P. Kreutzer Duquesne Light Company ACRS (16) 435 Sixth Avenue NRC Participants Pittsbu rgh, Pennsylvania 15219 NSIC RA Mr. R. E. Ma rt i n
. James A. Werling Duquesne Light Company Plant Superintendent 435 Sixth Avenue Beaver Valley Power Station Pittsburgh, Pennsylvania 15219 P. O. Box 4 Shippingpart, Pennsylvania 15077 M
nF n U
Mr. John A. Levin City of Pittsburgh Public Utility Comission 313 City-County Building P. O. Box 3265 Pittsburgh, Pennsylvania 1521S Harrisburg, Pennsylvania 17120 Mr. J. D. Sieber, Superintendent of Licensing and Conpliance Duquesne Light Company Post Office Box 4 Shippingport, Pennsylvania 15077 l
f nou
'o UNITED STATES
'g 8'
NUCLEAR REGULATORY COMMISSION o
E WASHINGTON, D. C. 20666 8
APRIL 7 1990
'% *.. ift NO:
50-334 LICENSEE:
DUQUESNE LIGHT COMPANY FACILITY:
BEAVER VALLEY POWER STATION, UNIT NO. 1
SUBJECT:
MEETING
SUMMARY
- RECIRCULATION SPRAY HEAT EXCHANGER SYSTEM INTEGRITY The staff met with Duquesne Light Company, the licensee, and Stone and Webster, the licensee's Architect-Engineer, on March 26, 1980, to discuss the system integrity of the recirculation spray heat exchangers for Beaver Valley, Unit No. 1.
The list of attendees is attached as Enclosure 1.
The meeting was called by the NRC as an indirect result of Lessons Learned reviews of containment isolations on phase A and phase B signals.
The licensee's submittals indicated that river water flows through containment after an accident to cool the recirculation spray heat exchangers.
These heat exchangers provide containment cooling and ECCS cooling following an accident.
To avoid boron dilution of the sump water, any anticipated leakage in the heat exchanger is to the river water inside the tubes.
In order to assure recirculation spray heat exchanger tube leakage does not result in unacceptable liquid discharges to the cooling tower and river, a review of the system integrity was deemed necessary.
The licensee provided a general description of the system operation and design parameters (see Enclosure 2).
During the meeting, the following information was also provided by the licensee and Stone and Webster.
Radiation Monitor Each discharge line monitor is in a sample bypass line.
Bypass flow is provided through a pump that starts on containment isolation phase B signal (CIB).
The pump is thought to be a centrifugal pump.
There are no check valves on the bypass line although there may be manual shutoff valves.
The radiation monitors are not Class 1E, and their surveillance is not covered by the technical specifications.
l The radiation monitors on the discharge lines (one for each heat exchanger) are l
powered from one train of the emergency busses.
The radiation monitor on the common discharge header is powered from the other train of the emergency busses.
s There are alarms and indicators in the control room.
The alarms are set for high radiation at 2.2 x 104 counts per minute and high-high radiation at 2.2 x 10s counts per minute.
The high-high level corresponds to l
1 microcurie per milliliter.
l l
2 APRit 7 1980 The radiation monitors are shielded by 6 inches of lead to minimize backgrcund interference.
O Recirculation Spray Heat Exchanger River water is in the tube side and although the water has been drained j
from the tubes, they cannot be considered as dry.
Chlorinated river water was pumped through the tubes to flush them during construction.
Containment sump water is on the shell side.
The shell side is drained and i in be assumed to be wet by intermittent condensation.
Vent holes in the ;nell allow the entrained air to escape once the spray pumps come on; the holes weep sump water during operation.
l All recirculation spray pumps (two inside containment and two outside containment) come on automatically at the same time following a CIB.
The four heat exchangers begin operation at the same time although only two 1
are required (each heat exchanger has 50 percent capacity for heat removal following an accident).
After one day, only one heat exchanger is required to maintain heat removal capability.
Manual action taken by the reactor operators to shut off a heat exchanger will also shut off the spray pump to that heat exchanger.
Following receipt of the alarm from the radiation monitor, Beaver Valley assumes operator action within 10 minutes.
i Heat exchanger tubes were specified to be rolled through most of the tube sheet and welded.
Recirculation Spray Pumps One outside recirculation spray pump and one inside pump are on one train of the emergency busses while the other outside and inside pumps are on l
the other train.
Relief Valves Each discharge line has a relief valve which discharges locally in the auxiliary building.
Relief is on temperature.
Testing The Technical Specification requirements for surveillance testing of the integrity of the Recirculation Spray system is contained in Surveillance Requirements 4.6.2.2 and is limited to starting of pumps, verifying position and locked status of valves, cycling of valves, testing start and delay signals to pumps, flow and pressure testing of outside recircula-tion pumps, and an air or smoke test of the spray nozzles for obstruction.
3 APRIL 7 1900 The licensee performs a limited test of the heat exchanger during Type C containment leak testing of the isolation valves in the river water system.
An air test at 70 psia and a measurement of the amount of air required to maintain the pressure provides some indication of the leak tightness of the valves, pipes, connections, and the heat exchanger tubes.
The discussions with the licensee centered on the need for analyses and re-review of the integrity. and operation of the recirculation spray system.
The licensee agreed to perform an analysis of the consequences of failures of the systems components (Radiation Monitor, Relief Valves, Heat Exchangers, piping and bellows, expansion joints, etc.) and to assure there is adequate mitigating actions, systems, procedures, and testing to reduce the potential consequences of loss of integrity.
It was agreed that another meeting would be held as soon as the licensee was prepared to discuss his findings.
This meeting is anticipated to occur in late April.
i D. Wiggingt n Senior Project Manager Operating Reactors Branch 1 G
S
\\
DECAY HEAT EXCHANGER MEETING BEAVER VALLEY 1 3-26-80 ATTENDEE ORG Dave Wiggington NRR-0RB-1 Jack Sieber Duquesne Light J. J. Carey Duquesne Light Rich Prokopovich Duquesne Light Bill Drotleff Stone & Webster Bob Vanasse Stone & Webster J. J. Moran Stone & Webster Roger Tappan Stone & Webster Charles Ader Stone & Webster Frank Elia, Jr.
Stone & Webster Frank Sestak, Jr.
Stone & Webster W. B. Dodson Stone & Webster J. D. Kellams VEPC0 J. E. Rosenthal NRC/ DOR /RSB J. Zudans NRC/ DOR /EB K. Wichman NRC/00R/EB T. A. Ippplito NRC/ DOR R. Woods NRC/IE J. Pulsip;pr,'
NRC/NRR/CSB A. SchwenceP NRC/0RB-1 C. Cheng NRC/ DOR l
l t
9 NECs QCUL.aTHOT _1 SPRAY /RH ER
]
W4ATER SCHEEJ ATIC CIBp~ kOUTSIDE CONTAINMENTW+-INSIDE CONTAINM i
FROM RIVER WATER PUMP l
^^ ^^
d.
.~
I b' -
E
$2 MOV(TYR)
~~
A FLOW ELEMENT
~
h an na VW T
w k
B C
[_J 4:: Y AA AA
~
M~~
i
,w C
_I AA A6 M
Cl h r,--
w m
~
M FROM RIVER T
M y
D WATER PUMP L
l l
W
~
k.L RECIRCUL ATION TO T
seR^v coo'ERs circ WATER OUTSIDE RECiRCUL A. TION INSIDE RECIRCULATION SPRAY PUMPS SPRAY PUMPS 60-16305
~~~l' l
f\\
~
~
R ECDRCULATDODS SPRaV/
RIUGR tJATER GVSTBCRO OUTSIDE CONTAIN MENT =
INSIDE CONTAINMENT E L 848'-l O"-
aaaaa R ADI ATION MONITOR Q
EL.
g
_ _ y 7 3 8'-6" g T. { 736'-0" EL* 685'-6a OUTSIDE b 736-lI RECIRCU LATION SPRAY PUMP M
M; ::
i_
=
EL.
CH ARGE C-EL. 709'-6"
-M--
-701'-7" TUNNEL RIVER WATER MOV(TYR)
EL.
PUMP 699'-I,,
RECIRCUL ATION OHIO RIVER SPRAY COOLER
_=y
=
A E L. 6 41'- O" Q
Y E L. 690'- i l"
!R2 ECB MCU L ATIOD5 SPRAY COOLERS FUNCTION-CONTAINMENT HEAT REMOVAL l
DESIGN-ASME III, CLASS C TEMA CLASS R SHELL & TUBE MATERIALS-TUBES-304L S.S.
TUBESHEETS-304L S.S.
SHELL-304L S.S.
CHANNEL-C.S.
CHANNEL COVER-C.S.
FABRICATION-FULL RADIOGRAPH, SHELL & TUBE l
-WELDED DIAPHRAGM SEAL ON CHANNEL COVER j
-EXPANDED & SEAL WELDED TUBE 5-TO-TUBESHEETS i
a ao;fa;3
RECERCU L ATION SPRAY COOLERS DESIGN CONDITIONS SHELL TUBE PRESSURE,PSIG 150 150 INT./48 EXT.
TEMPERATURE, F
280 280 OPERAT!MG CONDITIONS SHELL TUBE RECIRCULATION FLUID SPRAY RIVER WATER FLOW (GPM?
3400 4000 TEMPERATURE IN F
< 280
< 86 PRESSURE IN (APPROX.?
80-90 PSIG
<66 PSIG (1) PLUS CONTAINMENT PRESSURE i
bb h
1 o'
2 6
n.>
4 F
. 'J 4
u.
y z
u, w
- = y) i tt s d "e 5.
) :n.
Q* 5-f gE d
F 6
3, s
.N z-
~ ~ '
'i 3
ip 4
- g 1 O10 W
8 8
- g l
9
- [
.)T 4j R,:. -.
- p. jub,,.
. h5 6 p;,e. j.
m y
t g,
f.a u m a n
v ao~
~.i c
N..-]..l 9h N
8 n
y
, q ;, -
',". - m a a g
. r.
r
,m Ili + S[T'
^
&g.
5I
-N'S M
/
. JJ !
't t
'y* T I
/
i_
t_
,i ill
(
rn ggl 1)
.(
-i A,
l4
,5, 5
r t
rl p
5
?
O to 3
l 1
st 1
J li 5'
d f
h' l
\\
i r
a 1
c c
A,p c p
c I
I 6$bL_,
i q
lj I l! $ +
l y
B.
--[j g?
, il
- 3l-
}
- ~w y
1 g
%4* L r b _$.
1-l --
89 g,
g
,_a g
- , qc
\\
..L L'
L_
4 t
i b
A.. bJj 1
,, k. l J%aLMU n ai!
11 oc ibn h
(f
,l 4._
g
-a, A *7.III
. f
{ ;g 4.44 g ia
.y
, g!
L* ee e
3 ",3
.g p
gq 1
g; p}a[Ir r} @
j 4.c. c.fic:
a MM $2 7{.
c
-m c
s.
in. llN; 3.. d-
}'
7 1
5 a
[
's 31/
[
fil p" '. ;;
Jp p
' ~n n y'
g l1
=ptv.
.g 4,
',3 Ijj m '.og#q ijn I
D r.~. _
_ 7_. 6_'.W. _.,_. p 3 ;.R
_i
/
- i. N_._.
b+f4, T _';l_.__m. _..adg&
~ i.
g P,,
l
,t,t t.I! pt. k qi y ' Q,, s:f-1 I
p; 5,
_A,1.I I.
4 gi se i.
- i
,,i i s 3
.,J n., _
- e,d!
p
!. '- 2jy %,m,$
0 h
y A( n-l\\
H
\\
^
i s I;{
i
- - r-s
~N
~': M;{}. '
t $$
ll Sy-,
z
'; 4.L_ _..-._;..L. -........,
5+
Na.
., -[]_,. ]..
4 m. - -,4.x i
g I
o n
f' a,
u I.3 M H
e, l -_ __ __._J L._ _ llpy.s
'- ! f t, t-I
. p; La j
.}jij[] u,. IIE' l
I
-f/4
[O
'g4
' y' Jji, j l
?
e,I a..
=-
t.
-x
.y
'~
~
~
- ,g ---
- _ges=--- p#i.1[~
[
t 3' 1 )n cr=.'_ _ n__L i
a
. _=-
5.,
r-sad \\
l 1
u, -
92
.i t
.