ML20092L535
| ML20092L535 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 06/27/1984 |
| From: | Ramsey W GEORGIA POWER CO., SOUTHERN COMPANY SERVICES, INC. |
| To: | |
| Shared Package | |
| ML20092L529 | List: |
| References | |
| NUDOCS 8406290432 | |
| Download: ML20092L535 (79) | |
Text
{{#Wiki_filter:- FILED: June 27, 1984 UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION {_ BEFORE THE ATOMIC SAFETY AND LICENSING BOARD In the Matter of )
) Docket Nos. 50-424 GEORGIA POWER COMPANY, ET AL. ) 50-425
)
(Vogtle Electric Generating Plant, ) Units 1 and 2) ) AFFIDAVIT OF WILLIAM C. RAMSEY State of Alabama l' County of Jefferson
- Af ter. being duly sworn according to law, the undersigned af fiant, William C. Ramsey, states and deposes that the following is true and correct and of his own personal knowledge.-
.1. I am William C.-Ramsey. I am employed by Southern Company Services, Inc. as Manager-Nuclear Plant Projects Licensing, Nuclear Safety and Fuel. I am a mechanical engineer and I have been involved in Nuclear Power Plant Design for the past thirteen years. I am a member of ASME, Chairman of the AIF Seismic Qualification Working Group, a member of the AIF Equipment Qualification Subcommittee, and a member
-of the EPRI Technical Advisory Committees for Electrical and Mechanical Equipment Qualification. I organized and chaired the Vogtle Electric Generating Plant Equipment Qualification Task Force.
t
- 2. Dose Rate: The qualification tests for the electric cables used at Vogtle complied with IEEE Standard 383-1974, "IEEE Standard for Type Test of Class 1E Electric Cables, Field Splices, and Connections
! for Nuclear' Power Generating Stations," which was endorsed in NRC Regulatory Guide 1.131, " Qualification Tests of Electric Cables, Field _, 8406290432 840627 ~ PDR ADOCK 05000424
- O PDR i T
l
I Splices, and Connections for Light-Water-Cooled Nuclear Power Plants" (August 1977). Paragraphs 2.3.3.3 and 2.4.2 provide that the rate of 6 radiation exposure shall not be greater than 1 x 10 rad per hour.
- 3. Synergism: The qualification tests for electric cables considered the synergistic effects of heat and radiation. FSAR, Table 3.11.B.3-1 (Sheet 11). In accordance with Section 2.3.3 and subsections 2.3.3.1 - 2.3.3.4 of IEEE-383-1974, cable was subjected first to circulating air oven aging, then to gamma radiation in air. An inert atmosphere was not used.
- 4. Terminal Blocks: Thece are no terminal blocks in safety-related applications inside the Vogtle containment. Also, there are no terminal blocks in safety-related applications outside containment that are necessary for accident mitigation and that could be exposed to, and therefore need be qualified against, a steam environment.
- 5. Limitorque Motor Operators: In 1981 and 1982, Limitorque Motor Operators failed environmental qualification tests in high-temperature steam environments. As a result, Westinghouse and Limitorque designed new motors, which were then successfully qualified for a high temperature steam environment (420 F). Negotiations for the procurement of these new motors as replacements for unqualified motors at Vogtle commenced in September 1982 and were recently completed. Applicants have ordered these new motors as replacements for the motors in containment.
- 6. Hydrogen Recombiners: In addition to the tests listed in the FSAR at S 6.2.5.4.1, the electrical components of the Westinghouse electric recombiner were subjected to 2 x 10 rad radiation. WCAP-7820 (Supp. 2) (Oct. 1973) at S 3.6 (Attachment I hereto). Then, to meet i
I l the requirements of IEEE-383-1974, the power cable was subjected to ! l thermal aging, irradiation, post-LOCA containment steam and spray f i exposure and voltage tests. WCAP-7820, Supp. 7 (August 1977) at 9, l 12 (Attachment 2 hereto). The Westinghouse recombiner does not have f l pressure transducers. l
, .. ~ ) '
. . /, ;
i ,(i
'%g.bs -
William C. Ramsey [
/ l Subscribed and sworn to me i this ./6 '{ day of June, 1984. 1
, . i ,
l,
,X, Acb isl} O /!Le i Notary Public / f My Commission expires: {[/d , / /
/ '
I t l i l I
- i 1
1 i t t
?
l f
m--
.t'.
F June 27, 1984
- ): t f
UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION BEFORE THE ATOMIC SAFETY 10H) LICENSING BOARD f
.In the Matter-of )
)
GEORGIA POWER COMPANY, --ET AL. ) Docket Nos. 50-424 6
) 50-425 i (Vogtle. Electric Generating Plant,)
Units-I and 2)
) ,
c CERTIFICATE OF SERVICE : i I hereby certify that copies of the " Affidavit of William C. Ramsey," dated June 26, 1984, were served upon i the personsLon the attached Service List by deposit in the : United States mail, postage prepaid, this 27th day of June, l 1984. p Af%t /2deV / t SQw6rge/F. Trowbridge j/ DATED: June 27, 1984 l t_.
t-f UNITED STATES OF AMERICA I NUCLEAR REGULATORY COMMISSION BEFORE THE ATOMIC SAFETY AND LICENSING BOARD l l In the Matter of )
)
GEORGIA POWER COMPANY, ET AL. ) Docket Nos. 50-424
) 50-425 '
(Vogtle Electric Generating Plant, ) Units 1 and 2) ) SERVICE LIST l Morton B.'Margulies, Chairman Atomic Safety and Licensing . Atomic Safety and Licensing Board Board Panel U.S. Nuclear Regulatory Commission U.S. Nuclear Regulatory Commission i Washington, D.C. 20555 Washington, D.C. 20555 Mr. Gustave A. Linenberger Docketing and Service Section l Atamic Safety and Licensing Board Office of the Secretary U.S. Nuclear Regulatory Commission U.S. Nuclear Regulatory Commission ; Washington, D.C. 20555 Washington, D.C. 20555 , Dr. Oscar H. Paris Bernard M. Bordenick, Esq. ' Atomic Safety and Licensing Board Office of Executive Legal Director , U.S. Nuclear Regulatory Commission U.S. Nuclear Regulatory Commission ! Washington, D.C. 20555 Washington, D.C. 20555 l t l Atomic Safety and' Licensing Board Tim Johnson l- Panel Campaign for a Prosperous Georgia , 175 Trinity Avenue. S.W.
.U.S. Nuclear Regulatory Commission ;
Washington, D.C. 20555 Atlanta, GA 30303 j Douglas C. Teper Carol A. Stangler j 1253 Lenox Circle 425 Euclid Terrace . Atlanta, GA .30306 Atlanta, GA 30307 l i- Jeanne Shorthouse Dan Feig- . 507 Atlanta Avenue 1130 Alta Avenua , l Atlanta, GA- 30315 Atlanta, GA 30307 i Laurie Fowler & Vicki Breman Legal Environmental Assistance ; Foundation ; 1102 Healey Building ! Atlanta, GA 30303 i
f.;,. ~ ',
~,
{s .
~ t "'
WESTil GHOUSTCLA$$ 3 7 '
- i
,~ ,
mN ~ '
. ) L' ,
4 .
\* ' ~
m . t 4 x s
.uk i N s , s -
C -
.+s .
sy i,
% s
)
{,) B di - .,' - ,
, . ,s ,
1 . s t x , s
, . y .
ELECTRIC HYDROGEN, RECOMBINER , LWR CONTAINMENTS , 6 SU,P 'LEMENTAL TEST NUMBER 2
- v. ,
s -s s t : i
. l J. F. Wilsen O
Oct.1977 . t
, [ *,
APPROVED ' N # WW C. Eicheldinger, Manager
- Nuclear Safety Decartman ,1
, e, i :! .
- i;
,1 :.
Work Performed Under Shop Order No. EJPP 917 l ,. . l 3
. .l i
'T WESTINGHOUSE ELECTRIC CORPORATION 1
![
Nuclear Energy Systems P. O. Box 355 Pittsburgh, Pennryivania 15230 il I: 1 i
l
- e. -,, . ;
u,.m., - ' l! I l 1 I TABLE OF CONTENTS Section Title Page '
- {;
1 INTRODUCTION . t : 2
SUMMARY
2 i: 3 TEST AND TEST RESULTS 3
- 31. Seismic Tests of Poor _ Supply and Control Panel
, to IEEE 344 1975 * [
3 3 2. Test Method 4 3 ;, 3 3.. Recombiner Heater Capability Under Off Design
~
Conditions 4
- 34. Test Method 4 I
3 5. Oustification of Pcwer Cables to IEEE 383 1974 g 3 8. Test Material g 3 7. Test Procedure for Post.LOCA Environmental ! Tests (IEEE 383, Par. 2.4 12
- 38.
.. Steam and Soray Testing 12 [
3 9. Voltage Testing 14 I ; l' 310. Flame Testing (IEEE 383, Par. 2.$) 14 3 l 3-11. High. Temperature Environmental Tcsts of Power l Supply and Control Panel 15 3-12. Test Method 15 " I 313. Cold Reference Junction Box for Recombiner Thermocouples 15 314. Automatic Temperature Control 17 lfij L F I I l j _%.v,m.,,-,. .,s=
- m. , .
.%A-:e 52. ? - g..... .
- 1
-w .
~ m ;n *.
- LIST OF ILLUSTRATIONS . !
j Figure
.- Title p,, ;
31 Operating Basis Earthquake, OBE 1 5 S2 Sine Best input for Testing 6 3'3 Acceleration Versus Frecuency 7 l S4 Acceleration Frequency 8 i 35 Heater Temperature (*F) 10 34 Test Setup for Steam Exposure 13 37 Power Supply Test - 16 ; 38 Cold Reference Junction Box Circuit Schematic 18 e i
. i 6
. h. -
i! i i* < 4
- i I
i I l
!h
.r i
i*
.-_..'_..b....-...- -- - -- ----
- ,,e -,- r d -
_ -* *w s- r-ews.r----+ g- - er~ e - --a w - Mv +w-v - -w--' -M- 9 w.' cer--- -w+-nvv -
r- . . , O . v, LIST OF TABLES Table Title p,g, 3-1 Hester Test With Elements Dirconnected 11 32 Heater Test Reserve Capuity 11 an. O a
** 0
- e %
e b e e e
, - - eemog g s- e W'% %84 NMW , r*=aN Ob e'e * "
O w ----. - - - . -.-p---,
m w. . SECTION 1 INTRODUCTION The Westinghouse Electr:c Corporation has developed, tested, and produced an electric hydro gen recombiner for installation inside reactor containment for use following a postulated loss-of coolant accident where such equipment is needed to meet tne requirements of USNRC Guide 1.7. The development and qualification program for the electric recombiner has involved extensive testing on both prototyoe and the production rvcombiners. This testing was desenbed in WCAP 7709 L and Supplements 1, 2, 3, 4.-5 and 6 and demonstrates cualification of the recombiner to IEEE 323 1974 and IEEE 344 1975. This report provides qualification test results for the recombiner power cable (located Inside the containment), the recombiner control and power suoply panels (located
- outside the containment) and additional features which may be selected by the customer.
Also included are results of testing which further demonstrate the conservative design of
~
- the recombiner.
Supplement 7 concludes the quellfication documentation for this hydrogen recombiner modeL e e 4 e
-, ., .e,we y*===' e .wuh -- --- N"*'" *C * ~~' ~
F ' SECTION 2
SUMMARY
The fo!!cwing tests were performed on the recombiner to provide additional information. a Seismic tests were performed on the power supply and control panel using , both biaxial, random frequency tests, and biaxial sine beat tests with the equipment energized. These tests again demonstrate the ability of thnen components to withstand seismic events. r a Capability of the recombiner to operate witn some heaters inoperative was demonstrated by disconnecting va7ying numbers of heater elem "s, then testing to determine temperature distribution and maximum oower attainable. s' Power cables were qualified to IEEE-3831974 by performing environmental and flame tests, e Power supply and control panel short term upcration in a high temperature ; environment was demonstrated by operation in a temperature-controlled environment for 10 days. The power supply was operated at 135*P and the i control panel at 155'7.
. e A cold reference junction box. which perrcits the use of copper containment '
penetrations for the recombiner thermocouples, was developed and tested to facilitate recombiner installation, a An automatic temperature controller for the recombinar was developed and tested to permit automatic temperature controt for the recombiner should this mode of operation be desirable. *
~w'Wm , ' . . ee , %#ye p- r r - ww. .___ _ pe speer e a w ,-wee . +,* w .M y- f >. mesas-a. 3 47 2..W. w e e
g -ww ,, - , , - --- - - - - - --
r n:
--~
l SECTION 3 { TESTS AND TEST RESULTS i f 3 1. SEISMIC TESTS OF POWER SUPPLY AND CONTROL PANEL TO ; IEEE 344-1975 i The power supply and control panel have been previously subjected to sirigle. axis sine beat testing *while in the nonenergized mode. This informetic- is reported in WCAP 7709 L Supplement 2. These previous tests were performed on both a prototype and producticn l power supply and control panels. Since these tests were performed, IEEE 344 1975 revision has been issued. - A new seismic test was performed using biaxial motion and both random frequency and sine best input. These tests were performed on a production power supply which was energized
- et normal' power. These tests again demonstrate the ability of the power supply and control :
panel to perform their intended function after five Operating Basis Earthquakes (OBE) and i a Sefe Shutdown Earthquake (SSE).
. i 3 2. Test Method The powei wuuly een.1 curitrol panos were mountee on tme dri re plate of a vibration table at
- the Westinghouse Advanced Energy Systems located at Large, Pennsylvania. The control panel -
1 . . ~was electrically egnnected to the power supply which was then connected to an electrical feed (electric recombiner heaters held in a rack). The test series consisted of resonance i frequency search plus five OPE's followed by an SSE. The input for the five OBE's was a , t blaxlal, random frequency while the SSE was a biaxial, sHe beat inout. The angle of ; motion of the table was set to produce vertical accelerations which wert 2/3 the magnitude of the hori2cntal acceleration. For the sine beat test, four sesarate tests were run. First, the ; equipment was mounted 45' to the horizontal plane of motion, then rotated 90' for each of the next three test runs in accordance with paragraph 6.6.6 of IEEE 344-1975. ! i The acceleration levels for the OBE tests are shown on figure 31. The crcinate is the retoonia ' spectra with a 2.5 percent damping factor. The inout was made uo of decaying sinusoids ! covering the frequency range of 1.25 to 35.0 Hz.
-- --y n- - - , . ---.
The sine beat test was performed at each resonance frequency and at tne folicwing frequencies: 1,25,1.75, 2.5, 3.5, 5, 7, 9.5,13,18, 24.5 and 33.5 Hz. Each sine beat test consisted of five bests, each containing 10 cycles as shown in figure 3 2. The osak horizontal accelerations are ' ~~ sh'own on figures 3 3 and 3 4 The sine best test was run four times. (Once for each equipment mounting direction) without component failure. It was necessery to edd one wiring harness strap and to modify the temperature indicator mounting bracket early in the sine beat test, however, a total of four consecutive tests were run with the equioment in its final configuration. (The wiring harness straps and modified bracket will be incorporated in the new equipment.) ' This testing conforms to the requirements of IEEE 344-1975. " Recommended Practices for Seismic Qualification of Class 1E Equipment for Nuclear Power Generating Stations." 33, RECOMBINER HEATER CAPABILITY UNDER OFF DSSIGN CONDITIONS The purpose of this test was to demonstrate the reserve capacity of the hydrogen recombiner heater tystem The heater banks and heater elements have been successfully testeo under ex-treme post.LOCA environmental conditions as reported in WCAP.7709.L Supplements 2. 3,4, and 5. These tests include post.l.OCA environmental exposure for one year. Based on these tests, no heater element failures would be credicted during recombiner post LOCA se vies.
. However, to demonstrate by test, the extent of the recomoiner's ability to operate with less than the full complement of operational heater elements, a test series was cerformed.
3 4. Test Method For this test, a production recombiner, power sucoly and control canel were connected to a , power source. Thermocoupin were attached to each heater bank and were read out on a strio recorder. The power outour of the recombiner was rneasured with the power meter on the , control panel. The control panel was ecuioped for automatic and manual power control as , desqribed in peregraph 314 of this report. Before test readings were taken, the exact voltage of the input powe'r was measured and readings were normalized to 480 Vac. To establish a reference beris, the recombiner was first tested with all heater elements coerational. The recombiner was heated to 1200*F and stabilized at inis temoerature. Readings were taken to measure the steady. state power recuired to maintain tnis temperatura. The power centrotter was then set on full power and this value was cecorded. This latter value is the maximum power the recombiner will draw at 1200'F. (Heater element filament resistance is slightly temperature dependent). l l
% .w . . . - - - - --
. - _ _4 __ _ _ ~ . - . _ _ __ _ _ - _ _
h=&:me:c~ - -
,u.-.
I. $[ s s ' .' .
- Itacs.1 100.0 b
10 0 "1 f.
/
M G
- aw-l.0 -
5 6 W-W
=
r i 4 l O,I - 0,01 io.o ico.o :
- o. i o FRE.QtiENCY (Hz)
Figure 31. Operating Basis Earthqua'w e. OBE 1 T - =* ' a -q- 7 p ym ee -y- y y Pt---.-- y +- -
8 6106-9 I I
% )k l ) !
I_
.A f L
\ _]
%-- - s
%- _.]
8 _/
-A. -
s u ' l M a
$ L /
had g a -F r y W n' U [ l e . 2 1 1 . .- _4 _h ' ed n : w I EU h I 3 s J 3
= .E.
, v. -
I e in w W r I a = n '
< u e k
" I w
, I l
. M w
s Y k1 _ 1 -
. 5
- \c '
j s - / 1 1
-l
% l a
h, w c 2 . - l M W t y 8 , Y v l
%% l
- , - .....sme --.-. a 'I 6 .
6
8
'$7 h N e e (
w I
- m t
I
- e E ,
3
- N 5 C. d. l o . '
_ n zw - m I o w f5 u 4
.C ~
v
- n ( ,
ci N. l 3
.? ,
u. I *
. i t . ,
ll l ll l l l l I l l l l l l ll l e e m.
- o. . o. i m - - e ;
(8.6) N011VW31300V ly1N0ZlWOH , 10dWI 310V1 3AIBO :
,_ _ , , . . .m
~ - . . , _ _ , . _ _ . . - , _ . . . _ . . , _ . , _
- ' ' ' ' " ' ' ' ^" w w- , , , . . , , , _ _ , , . __
l .. . i 1 e 6tedr-i
~
2.2 2.0 - I.6 . i 7 i.6 i
, i.s -
! -e i E e- - !. =; 1.2 - 1 ; a _, e 8 1. 0 4 1 om << F- {
~~^
tsJ ., I rm *= o.8 - l o a - 1 -
;;; o.6 1 I o i z 4
O.4 - 1, 1 i o.2 -
. I I I i i i I I I I I I l l 1 I I i G.0 0 2 4 6 8 10 12 14 16 18 20 22 24- 26 28 30 32 34 36 f
1
- , FREQUEllCY (fir) i l
E 4 i l } j Figure 3 4. Acceleration Frequency f l i - 3
) !'
1 <
.o
%. Following this, hester elements were disconnected in various heater banks as listed in table 31 This reduced the number of operational heater elements. The same test was then run for each
~
case listed in this table. The temperature distribution within the,recombiner for various combi. 1 nations of hester elements disconnected is shown on figure 3 5. This shows that only sliant veristions occur in the temperature profile. Table 3 2 shows the amount of reserve capacity in the recombiner.with various numbers of heater elements in nonoperation. 3 5. QUALIFICATION OF POWER, CABLES TO lEEE 383 1974 The power cables for the recombiner have been previously tested, along with the hester banks in the post LOCA steam and spray environment, subjected to 2 x 108 rad 1rradiation and seismically tested with the recombiner. This testing demonstrated that the cables are well j qualified for the intended service; however, the testing did not completely conform to the procedure outlined in IEEE 383 1974, Standard for Type Test of Class 1E Electric Cables. Field Splices and Connections for Nuclear Power Generating Stations. To meet the requirements
~
of Section 2.4 of the Standard, which treau environmental exposure, a se' ries of tests were
~
performed which included thermal aging, istadiation, post LOCA containment st7am and scray exposure and voltage tests. These tests were performed on cable take from a production run, i l IEEE 3831974 also includes Flame Testing under. its paragrach 2.5. This test is to demonstrate that the Cable does not Dropagate fire. The recombiner power cable was tested in accordance with this paragraoh. i 38; Test Material The following it a deccription of the recombinor powcr cubic which was test de , ; 4/c =8. 480-Volts Power Cable i Conductor - *8 AWG 7/0 0486 Nickel. Plated Copper insulation - Heat and radiation resistant'polyimide tape. 8. mil wall covered with a glass braid saturated with a heat ard ; radiation. resistant varnish. Conductor.' coded by colored tracers in the glass braic. Conductors caoled witn glass 1 filters. , ! Jacket - Extruded heat and raciation resistant silicone rubber, 60 mit wall. A glass braic saturated with varnish is l applied over siiicone rubber. Cable CD ---------- 0.590 inch (nominal) Cable weight - - -- - ---- 3 29 lb /M. (nominal) . ..- .__.
- e- -c_ n - -,-w.- ,--gy - -m-, ,,,e,y -
y y y- ,-,, , -~- - ,,--,-, . , , - y-m-,,m,--,-m-r,+- w -,,- ,,w,-,--.e - -
4 i**04-1 9 e M e I e
?
h w to N
==
.h e a
> N e w us 4 4
="h4 - *N.8 m pe -,ensrey.,.4- e, ,,,,,, _
10
L I N; TABLE 31 i I HEATER TEST WITH ELEMENTS DISCONNECTED 9
, j 3
s b,c ;
. i 1
=
9 e TABLE 3 2 l HEATER TEST RESERVE CAPACITY ! r i n , 4 i
, i L
e lb.c I e I e e e- m vd *
^
d, The test material came from Westinghouse Sturtevant Division and was a part of a 1,000 ft. cable order.
, Menu facturer: SOSTON IN3ULAThU WIRE AND CABLE COMPANY Boston, Massachusetts Rated for 480 Vac. 60 Hz at 45 amos in 400*F ambient. . i The installation of the cable utilizes ring. type metal lugs crimped onto each conductor.
l 3 7. Test Procedure for Post.LOCA Environmental Tests (Paragraph 2.4 of IEEE 383) The testing was performed at the Atomic Power Department. Westinghouse Canada Limited, Hamilton, Ontario. The cable received from Westinghouse Sturtevant Division was cut into two test samples, each approximately 12 feet long. One sample was subjected to the follow. ing thermal eging, e Form cable into a coil and place in air even at [ } b.c This simulates 40 years of normal life as deterrnined from figure 4 2 3 of WCAP.8587 " Environmental Qualification of Westinghouse NSSS Class 1E Equipment." _ e reite :q e,:.. +k. 3.J ..t l. ....,wl. . J the unepd wus e sulled arouno ! I a 14. inch. diameter metal mandrel and subjected to the following gamma - l irradiation. ,. Total Dose ------------------2.2 x 108 rad ' Dose Rate ----- -- ------------ Av e ra ge 1. 86 x 105 rad / hour The irradiation was conducted in the McMasters University Hot Cell located in Hamilton, Ontario. Since the cable is located inside the recombiner, the cable is shieldad to some *
. extent; however, no crvdit is taken for this in setting the dose rate at 2.2 x 108rada.
3 8. Steam *and Spray Testing Upon completion of tne irradiation, the cable samples (aged and unsged) were placed in a pressure vessel a shuwn on figure 3 6. This vessel was connected to a steem and air supoly. I The spray system was a cart of the test facility. The cabie was supported on a metal mandrel grounded to the vessel. Electrical power oenetrations in tne vessel wall were used to supcly the power to the ten cables. The two test cables were connected in series so that both cables
**=.m****w- m*** *-- ** * * * ~ ~ * ~ ~ "
w +,.w . .w , .eo.wa l
# e
. 43 see h..
t
-9 , -
P9
*to em O
I N. S
~
I i U
=
an O e ens W
~
9 h h i m C A a ee s i M e 2
. _5 e
I l . . . . . D 5
-*"-"*"'*" ~ '* ' * '** * *~
a-. en .g era **eme e ae - " * ' '
*=e4emee ==vedy e., -
gr. , -w _ - w w-- - -- -
- y
s d t were subjected to voltage and current. The power to the cables come from the recombiner pour supply and the electrical load was the recombiner. The 29 kw heater bank, which is j
.., the largest load on the cables, was attached to the cables and the power supply was energized to full power throughout the test.
For the shakedown test the power to the cables was turned on to full power. The steam to ! the vessel was then rapidly injected to 106 psia. This pressure was then held for 26 minutes and then reduced to 66 psis. After 2 hours and 35 minutes, the spray system was swted and . operated for 15 minutes with the vessel pressure at 64.7 psia. The shakedown test was com i pitted end the facility was shut down. The long term pressure test was then begun. This i consisted of rapid pressurization of the vessel tc 106 psia (322*F) with full power on the cable (29 kw). The spray which contained 2,000 ppm baron as boric acid buffered with Na OH to a pH of 10.5, was turned on 2 minutes after the pressurization. After 15, minutes, the peak pressure was reduced to 85 psis (312*F) with the soray on. This pressure was held for 15 minutes. At this time, the pressure was reoucec to 45 psia (227'F) with spray on and held . for 1 hour and 27 minutes. At this time, eacn cable was checked e.lectrically to verify that it ! was still properly energized. After 2 hours and 8 minutes, the pressure was reduced to 30 psia (257'F) with spray on. This pressure was herd for 20 hours. The spray was on for 6 hours 10 minutes. (Since the soray cannot impinge,an the cables inside the recombiner, the use of spray in the test is somewhat more severs than the real situation). The pressure was ...en ! reduced to 20 psia (160*F) and continued for 5 days. At inis time, the presrure was raised to 25 psia. (195'F) for 10 days. The pressure was then reduced to 20 psia (160*F) for a total test time of 33 days. The cables were energized at full power throughout the test. After this test, the cables were removed from the vessel and visually examined. Some discoloration ,, uf ll / glass overbrald which covers the silicone rubber cable jacket was evident. 3 9. Voltage Testing i Following the steam te' sting the cable was removed from the coil and straightened. it was then recoiled around a 24 inch dismeter metal mandrel. The cable and mandrel were then immersed in tao water and a voltage of 640 Vac was coolied to the concueters for 5 minutes. The cables (aged and unaged) successfully passed this test. ; 3 10. Flame Testing Per IEEE 383, Paragraph 2.5 ; The purpose of this test is to demonstrate that the cable coes not orcungate fire even if its outer covering and insulation nave been destroyed in tne area of flame impingement. IEEE 383 1974, Paragraph 2.5 describes a method for flame testing cables. , For this test, cable samples from a production run were subjected to'ine vertical tray test using a ribbon gas burner as described in section 2 4.4.1 of the IEEE 383 Standard. I _ _.. _ _-_ _.. _ _.-_- _ .. _ .- _ _ _ __. _ .__.._..___ ~. _ _
1 Testing was performed at the Boston insulated Wire Company test facility at Plymouth, Massachusetts. The. test procedure described in sections 2.5.4.4.2. 2.5.4.4.3, and 2.5.4.4.4 was used and the acceptance criteria es described in 2.5.5 was the basis for acceptance. The cable was tested and met the criteria in section 2.5.5. . 3 11. HIGH TEMPERATURE ENVIRONMENTAL TESTS OF POWER SUPPLY ' AND. CONTROL PANEL. The' purpose of this test was to demonstrate that the power supply and control panel will not be adversely affected oy operation in an elevated temperature environment. The power supply and control panei are located external to the containment and are accessible after a LOCA. , For plants located in extremely warm climates, r,ome creas otherwise suitable for power supply ;
,' and control panel installation, may have short term maximum post.LOCA temperatures higher than the normal NEMA Standard (40*C). To broede , the number of plant areas suitable for power supply and control panel installation, the power supoly was tested at 135'F, and the control panel at 155'F for 10 days. These tests show that, short term, high temperature exposure does not adversely effect these components.
3 12. Test Methoci To form a high temperature environment around tne power supply and control panel, enclosures as shown on figure 3 7 were constructed. The heat losses from the power succly isolation transformer supplied sufficient heat to heat its enclosure to the desired temperature. The controf , panel enclosure was heated by a space heater which was tnermostatically controlled. The power ' supply was connected to a production recombiner whien served as the electrical losc and also with the control canel. The test was conducted far ten days (240 hours) with no detectable l adverse affect on either tne power supply or control canJ. # ' 3 13. COLD REFERENCE JUNCTION BOX FOR PECOMBINER THERMOCOUPLES The recombiner uses three chromel alumel thermocouples to rreasure recombiner operating temperature. Since the recombiner is located inside the containment and the tem erature readout instrument is located on the control panel iocated outside the containment, it is necessary to either crovide chromel alumel containment irstrument wire penetrations or use ! a cold reference junction box located insde the containment. In some instances, containment l design, including penetration daign is complete before tne recombiner installation design is complete so there are no chromel alumel containment per etrations (usually cooper penetrations ' are available). i
- l. _ _ _ . _ _ . . . . _ _ ._ _ _ . _ .
g _ . .. _ _
9
$e
- O 2
=
O
" d O
. r-l e e
9 e W 80 W h C
.- di s
m i e w
.x ta.
d e e e I._ J i O
' " " ' " * " - ' ' ' * *
- e*- * * - * *- m--=--e 10 r
(
%. To alieviate this problem, a simple cold reference junction box has been designed and tested which is compatible with the Honeywell Dislatrol temperature indicator which is supplied with the recombmer control panel. ,
Figure 3 8 shows schematically the installation of the junction box. Chromel alumel leacs are run from the recombiner to the junction box wnich can be located near the containment penetrations. Coocer leads are then run through the cenetrations to the control canel. Tne compensator in the junction box is connected to the indicator with cocoor leads. The com-pensator is a temperature sensitive, wire. wound resistor encapsulated in a ceramic type material. The compensator was irradiated to 2 x 108 rad, then placed in a steam environment at 300* F white energized. No measurable degradation in resistor output was detected. The function box and hardware containing the compensator .ind tvrminals is the same make as previously tested with the recombiner in steam and pressure; therefore, it has been previously cualified for in-containment usage. 314. AUTOMATIC TEMPERATURPCONTROL ;
, The temperature of the recombiner is determined by the' input power level to the recombiner.
The normal recombiner operating procedure calls for a manual setting of this power level in accordance with Technical Manual instructions.1.f it is desirable to control the power level by l , a feedcack signal from the rer.ombiner thermecouples, a circuit has been developed to ! accomplish this. l Al! circuit modifications are made in the control ptnel. The major enanges in design are the I addition of a printed circuit card to the Temperature Indicator to add tne control feature and addition of a switch to the Control Panel to enable switching from manual to automatic # r temperature contro't. Wiring modifications within the Control Panel are rnade, however the !- Control Panet interface with the power sucoly is not changed. i
- e. ,e.. e- s aw *~ *"~ ~
- - - ,- v - ,-,
--w. --% ,.-y.,---- ,y-, . g. .-e--s%-v--m-9-s-w----
(7 .g a
.4 4
t, T 3
' in,
'?.
. 1
- a
= .* $
e *
-=
1 m- a ;
-o ~e .a us - a
~
EE . .-. E, .,2,, P9 o it .-
' T.
]:
r-d -}: i i 4 i f IN3HNIT1NO3 .2 U i 4015100 x .
- E l a: = = = = m n w e m .w -
g g t co tt ot t ig t .9
. o u o e w o g 3 . -
o y 1N]NN1Y1NO3 / I I [ 5 m oo ,, o o oi,i % $ E LN]HW g ni, 9 o9 , o e N g e
, W
. . a
,9 d Z $
I m Ll 3J - 4
$."s nee a
- W
= E, < m m u a we E "O
\. VYV v E *W U9 g
e
. s e.4
- F"ea,-T.* 4.mee as med t. ere - m gmse ngsege *.e < + we>M
- heeh4 *1 44'* 4 , 4 - .t 14-..-.As.* art. o. .
* - ' - - - , - --- - - + -- _
w., ._,, _ _ _ ,
. _2 , = q [ .._ . . f. .
y , , ., * , _ .l _ y . . . ;.:.y, y iy _
') . '_ y ' _ 2, .
y._,, _ __),_ __ ; J ., Q, 4 W y _, ' jg g 'g .. fr - [ ' , ,' ' y l ;
%. ~Y .m
." ,g ; * ' J s
;. :s
- _ft M*
f..+-
-(
i
;s '
_- y ; '=-4 4 W. ,. ( .$ ,
- e. .. - 3
-p
'**. .. m3
.,,[ ..Wf
.;o'
;. n
' f, ' l6
,.. w"-
; g . ,; .yt- '
e r ay- . . .
. r ., ,
4,
- s. 4,.
c .sdg qr., ..q ,.e c- .-
. n .:
.. s .-
- e..
, . ., i .s. .
; M. 4..,,
. . . , .,s. ,g -
g , ., - , ., p e z.:.
- . a ,- , ., .
.. :W. .. g,. ,. y ;-
. s .:.
8 .
- 4. '
Q L
. t]
. 4. . r, . : g .: , f- . 4 ,..us a . .4,:
g r.
- r. u . R . v ...: _ .a_u . . . R;_. w, L . . :. r.
' ,l, f. _x ^
w ;g -3; _. 55 .; 3 . ; ".1 +
; ... g . n, , -
y .wp' of F-) ; j'
; 1./ N g; ; .. Y '.y '
x e
- : 7 F0R ?'.-lR : 2:T.C'NE: !5 1, ~ . 41
. '.,-t.,
.s s
. , .- {a c
' - s.s.7 , -
-}'.r~ q. , -{.w;p. ,; . ., g
. ' .. p
+
r s A c ,;. L, s*<R. :.:. . wow u<
- ' - - " - ---r^---- ., -c:
L A. -- .;. ,.
...stu4
. .i . . , --
- - ..y
'w n% ,.. -
.[h.. w.. w,. e
.c.
s.9 *. -
- Y k . e; .
'R U . .? G ' s:. . (*. ;.
y <* - .- . ., +,.,
?s.
.,., q q ...
-)..
4 ( . 4
. W.y *; k - .' Ng
' & ir
~
. ;'4 +. # .
.47 7 .
J' y
+ . -
"mm. ..,
. +.
' .f
- s. .
*M
. ,. i s . r, ..
-..+
,a .. ,
j. V '
.. .. m
= }. ,,. ; z7:., s
,. w r
c,. e ,. .:.8 . . , . i a
, K 7(, 'J ,h. . . ;;A - .
. % , M . ' ,,p
'. . -{ , / 6gy ' , : .]j "g*%, h -
.,,-T 3r } * :- 4
, ' '. Q [.' .,
, h $2 },. *
; u -l _ y. 9 N_ .A 0' l ~~. f . . . .
;i {lz j' _
'lwW S' ' [: ,,f . l )* . j .,,f.f.~
y '___f %.i m ,.-.Q, l
.'l
.~D.( ;f l; ? .t i'. h jilf 4. . lhe.f - 'l.E
- e ,. g ' ,t - ' .' , _ .+ '
< rW. , ;w .I j . , -
, f. [f'f ' *
- ff ( .; '
- a. ' .. n ; ' ' ' ' , W Jg. q 4
( g). p " O y . '. [ ,'
; 7 . , ( .c , ~3: .
at: %e ~, ;' ,( , L ~, [ p$[5 > ; ll... g f- % . .' 4'?>[ ' 4
. . 7 3 [Q' ' *o- }. ' N *. \ , ,; 4
_ jf 1. ', . - _
'-
- g , . . y, ;.m ' ( p t , ;' . . : ;, ' ,, ' p . ' ,) '.' y:. W g [W{e
- y.
v,.-t'- .,;s, '
- s, s. J.
g ,%., 1, . . , - f'
**=A. ' + 7
,.e ; . % ,,
S - g.,.y, ' >,,,3,, r ,.*
.;. .,, ; ?.. , ,9, .y y p --
.y e ~
..g.
~
c 3 : ,.
- 1. , .
..3, ~ . . . . -- ,
. . ,; m, .,2 -
y ,, -
+_. : , y . . .
- 4 ,-
. 4 . . w., .: e
.- , 3'. . - -. w+ , d. -
. .' y
..y
,,'g
.b. ., +e q -. - 1 + , ; -
.- . *g ' ' g . i. 4
.y s : ,j .. '
..;g a, . ~ - r
+ ' . - , :p s ,,
a.,p.%. g_ ,,Lg ' 4y , m n
- . .. , g . . , ,,;t. ,
q,~* .. 9 a.*
y
.e 43 .-
**.i....- ,;-
< , .), .,* -a - *
- a. . -
c' s . - P s.W4u ,
. u yg
, e.. . .. .s,@.a..G . -
4- - . .. s ig. -
.. g. ;
;* % ,. ; c
~+ 4 p y m'
'. l .3. ,3
;v .i.'* n.
h/s..-I TA c
.42~ .
{ '* i ,! /. ,7em[ .. . . . , .
, 71 b ' ,4 ." '- L>.*' ., h .[ - ['., .. :9/ '!? " N [ .J
*s.. g )
' a - '
. 4 ...:.
g ,' a . . H . wr '3 . A f:y. [.i, " f k , c ._ .1;b . ( 1.,;i ^ , ..j , ,. ' (%.[, . "' f , ) k' ':[y
- 4 . . , . ? J} ) .p. y h ' "'j,t,
. - y ,$ . 3.u - #
. , a s, .e w
- a, w - cs i 4n .- - -
- * *
- j . g.
.q.4
.e .. . . 3.. . .,
~
.- 'a.. t.. .- .
t ..t
> .'; , ,. i 4 ,:f N s.*'.e,. .-C; Q. . . i,c' . . #. -
. . , . [4 M ?. r
- 4 y....
..', 4t . '?, .- -27, ., gt s.s
"^
- W w
.. N . . .
., x R'
'. . ".. , +
. .,,%.% '. . .s
- i
~ h g :I ' . *g ,
,e
*:,,s'
?:]%. ~: ...'4-. :
. , . m v .
\ 'f*$a 5'
< g. #w.
e w. . .> % m -: 4 7. . . ..?= j%g%. *; ,*>}. ; ~m
?,,
/ ,, p+ N m % , & ~, r g a.
s.,- q* . 7 . ,.r < ,- .
.m
. 9, g_y ., 3.;,- , f., 7y-. , a . j/ , +-
"; t
. , , ,, 4g. 4 ...' +, .s
. ,3. .' (. ,, *. v-'-
., .L ..
, ',.g 4
. i q.
j. 4 .. . . , . , , ; .;' e
. s ..
e
., y k.
. , ,w
. n[. ,- j;g, . '
'.g. p. 4, a . 5
. . . g, 4
,y4;p u; ,- *,
-~. x sp ,; ,
. 7. . . , .t .
, e. 6, , } y ,4 l .
e n n , s .
.. ., de - a :
Y ^ ,f,-, ,: 3. ' ' '* j *. bg g , s ,; n. ~' .y
.~.
+ +.' l_, '
': *;?
2 , .. *
.'.',yU.. ..
.;s. 3 m, &" - - -
as
. e .- 4C y y .;;. . . .%
? - *
', );
- r .' , y
.'??' ' m. *, *~ ' I E h, , *. aQ ' ,. , lJR 7 .
..q q .,..
,,,.,. . c
.: , f;,,,, .."'
4 b.,
- t %(h .+\ .ps-
- , .:.3
'c ' ,:-
a h c . -
=, .y l[
; S ,; y'[j.[," ',g
' i m ., . : - ; . .. v.y) 1 ~ * , ' J.) , ,
^+'?,, . ., )*' . 4 f .c N.; f ; f. 3 4a. . {, { . .- d, g :f '. {;s , .'
m
.w , ,m . .
y f9.y .g.. 3 3 7 , ( y + v, <
- 7. , R.. ;. y. m . 9....,[...p.
s..
. g.._ ,
m ; t> %,[ $..
,y.
Qu. Q y..7 ,
, Q-. r ; x. 9 ,
< 3 ..
p {,s q .. f, .' L. J yNj_ } { ' .. I
. ,- c.'
.. g. . - 4 y g - '
s 19 y4.. MF /- 1 ..g6 , . - i '$ gj i s-ri .. . ' Q < g.j y ' . .. y,, g _}"} ') j, _,_ ,Q.u%.
"^
3 s 4
.. a,p. r ..?,7,s.g;,yf .,'.7 A.y v
.u , , .
. . y.
,, J . . ;
y - i , . . i . NES Class 3
< 's
- n.
-No $.
. ao g- - <
~v.
I w A
< : a& .
us
- 3*A 4 ELECTRIC HYDR 0 GEN RECOM3:$ER FOR Pk'R CONTAINMEN!3 4 .
EQUIPMENT QCli:FICATION REPORT 4 J. F. Wils:n A
~
October 1973
'1 1
/
E h l f % . 't '
' dm APPROVED:
R. Salvatori, Manager
-- ';uelear Safe ty
.i Werk Sponsored by Nuclear Servi:e Department c
g )
$l.
WESTINGHOUSE ELECTRIC CORPORATION Nuclear Energy Systems P. O. Box 355
- 1. Pittsburgh, Pennsylvania 15230 v 3 T.
,, ...,.%-+-e. ..~,vgs.w w -c. ...,my., , , ,,,,~,~,,-r- . . , . ....-..re. .--e--.e
m- ,. . t- 3 ) r Material that is ' proprietary to the Westinghouse Electric Corporation has been deleted from this document where marked by means of brackets. The basis'for marking the material proprietary is identified by marginal notes I referring.co the standards in Section 8 of the affidavit of R. A. Wiesemann of record "In the Matter of Acceptance Criteria for Emergency Core Cooling Systems for Light. Water Cooled Nuclear Power Reactors (Docket No. RM-50-1)" at transcript pages 3706 through 3710 (February O' ,1972) . 4 I 11 t v v e --
--~pr ,- . , , , , v-e--r..-,-mn,,--,-w.- rw----, w~,,,....,~w.-w,w, ~,---,,--~,.~-,,r--em
4 s TABLE OF CONTENTS Sectica Title Pace 1 INTRODUCTION 1-1 2
SUMMARY
2-1 3 TEST PROGRAM AND RESULTS 3-1 3.1 Air Ficw Test and Temperature Distribution Tests 3-1 3.1.1 Air Flow Tests 3-1 3.;.2 Te:pe rature Tes ts 3-4 3.2 Scr=al Se rvice Life Thermal Cycle Tests 3' 3.3 5eis 1c Tests 3-7 3.3.1 Equipnent Tested 3-7 . I 3.3.2 Test Proce dure s 3-3 1 3.3.3 Vibration Test Res ults 3-17
'3.3.4 Seismic Testing of Production Recombiner 3-18 3.3.3 Seismic Testing of Production Power Supply and Control Panel 3-19 3.- Cen tainment Environment 3-19 3.a.1 _ Test Facility 3-19 3.4.2 Equipment Te st e d 3-20 3.4.3 Test Prog-ar 3-20
. 3. .' Test Res ults 3-26 3.a.3 Confirnatory Steam Chamber Tests 3-27
- 3. 6 Conclu-icns 3-27 3.3 Gr:und Fault Test 3-28 iii
7.. IA3LE OF CONTENTS (cent) Section Title Page 3.6 Irradiation Tests 3-25
- 3. 6.1 Descriptica cf Parts to be Type Tested 3-2E 3.6.2 Test Progra 2-29 3.6.3 Post-Irradiation Test Fr:gran 2-29 3.6.4 Test Results 3-1 APPENDIA A DESCRIPT!05 0F ELECTRIC HYDROCIN RECC."3:NER A'.
A.1 Description A-1 A.2 Design Criteria A-5 APPEND;X 3 DETAILS OF RELATED TOPICS E ', 3.1 Spray Tests or Prototve; Rec:=biner E-1 5.2 Heater Elements ?. - 1 3.; Analysis of Transient Pressure Leads 1-2 E iv
~
LIST OF ILLUSTRATIONS
- Figure Title Page 3-1 Electric Recombiner Flow Test 3-2 3-2 Recombiner Flow Race 3-3 3-3 Recc=biner Temperatures , 64% of Full Power (k'4) 3-3 3-4 Temperatures Around Recembiner During Operation 3-6 3-5' Power Supply 3-9 3-6 centrol Panel 3-10
~3-7 Power Supply and Centrol Panel on Shaker Table 3-11 3-S Sine Beat Input for Testing 3-13
'3-9 Acceleration Versus Frequency 3-1 10 Acceleration Frequency 3-13 3-11 Heater Frame Tes t Assembly Ins talled in -
Pressure Cha=ber 21 3-12 Data Acquisiti=n Equipment 3-22 A-; Electric Hydrogen Recombiner A-2 A-2 - Pretotype Electric Hydrogen Recombiner Typical Heater A-4 t V L_
(- s i List of Tables Table Tit le Page A-1 Electric Hydrogen Recc=biner Typical Parame te rs A-3 4 h 5 i I n I 4 t-v1 } , __ _ _ _ . _ _ _ _ . --. _ . -
u SECTIOS 1 INTRODUCTION The 'a'estinghouse Electric Corporation-has developed an electri hydrogen recon-biner .for installation inside reactor containments. for use following a' postulated los s-o f-coolant accident where such equipment is needed to meet the requiremen:s
.of AEC Safety Guide 7. This recombiner has no moving parts and does not require any piping, valves, pumps or syste=s which otherwise would be required if :he recombiner were installed outside. the contain=en:, Also, it uses ele::ri:
resistance heaters to heat a na: ural convection' flow of containment atmosphere to a temperature above that required for the hydrogen-oxygen reaction, thereb causing the hydrogen to combine with the oxygen in the air which is being pro-
- cessed by the recombiner.
The development program for the electric recombiner has involved extensive
- estin: :n bo:h a production unit reco=biner and on'a prototype recombiner.
Two previous reports have been . issued which describe tne initial develop =en: plus . :ne tes ting pe rformed on the prototype recombiner. [1]
! .i s rep:r: supple:ents these earlier reports and describes the subsequent ex:ensive :esting perfor:ed on a production unit recombiner with its associated p:ver supp'y and control equip =ent.
. These tests show that the electric hydro-gen re::n::ner will satisf actorily perform all its intended f unctions.
I I 1-1
l f SECTION 2 SL*.P.ARY Ex:ensive tests have been perfor=ed on a produe:icn unit elec:ri: re::=biner system to confirs :nat the produ:: ion equipment will perfor satisfsetorily. These tests are in addition to and supplemen the tests on the pro totype re::=- biner whi:h were reported'in '4 CAP-7820 Supplement 1. A description of the produe: ion electric recombiner is given in Appendix A cf
- nis repor:; :his recombiner_ is essentially the s:ce as the proto:ype except f:r .some minor design changes developed during the course of the devel:pmen:
O f :nis pro gram. f The.:es:s perf:r=ed and described herein snow that the production ele::ri: tirrgen rec:=biner is . fully adequate for nor=al service and post-LCCA cen-ci:r:ns. These tests and results ob:sined on the production recombiner an: 1:3 associa:ed equipmen: can be su==arized as follows:
.a. Air il:w tes:s have confirmed that the air flow through :he recombiner is well--in excess of the specified 100 scf: flow.
s
- . Zes;erature tes:s have confirmed that the recombination tempe rature is reached using only about two-thirds of :ne power available frs=
- sys:es.
hea::; and cooldown ther=al cycle tests (30 cycles) have confirmed
- ne capabili:y of the recombiner and i:s heaters to withstand well in excess o f :he number o f such cycles expected during the life of a re :: =b ine r .
- 2. ;;A 'env :: =ent :ests with simulated con:ainment steam pressure
- ::.~7 psia) and thermal transients have confir=ed the capability
- f :ne re::=biner equipment including the recombiner heaters , electri-
- al wiring, and ther=occuple syste= to perfor= satisfactorily under these ac:ident conditions.
2-1
s
- e. To estimate the amount of reserve life present in the recombiner sys tem,' lthe equipment tested under (d) was subjected to a series of h tests designed to produce failure. These tests consisted of a series of applications of the post-LOCA s:eam pressure and spray transient
-in the steam chamber. The heaters, electrical system and therme: uple system were ener,gi:ed repeatedly. Af ter six post-LOCA pressure tran-sients , no functional failure was produced sc :esting was discontinued.
The heater banks were ' completely disassembled and tested. All hea:ers e still functioned properly (heated up); however,11 of the' 240 indi-vidual heaters showed nondisabling sheath damage at the cold ena. Further s team chamber tests were : hen performed on another group a f heater banks which confir=ed that at least four post-LOCA pressure
- ansients are required to ini:iate this type of nondisabling damage.
- f. Irradia:1:n tests up ti 2 x 13 rads en all pertinent equipment.
including all :he electrical c =ponents of :he recombiner, have ::n-firmed the capability of the ree =biner to withs:and and perfern sa:isfae::rily after exposure to such radia:ica levels.
- g. Seis 1: :es:s up :: 2g a: eleration using :he sine beat me:hed des-ribed in IEEE-34;I confirm :he capabill:y of the equipment to vitastand all anticipated seismic candi:1ons. These tests :ogether wi:a a:di:icnal calculations, if any, can be used to qualify re::=-
- iners far individual plant sites wi:h specift: seismic require =en:s.
Cle::ri: gr:und fault tests have confirmed the capabili:y Of the
~
re::n::ner :: function with no i=pairment of its operation if a single sner: circuit to ground occurs within any of the heaters.
- n addi:icn. because of the excess heater capaci:y provided, an open cir:ui: in any f these heaters would have essentially no ef fect on
- he re:: siner performance.
The ::n:lua t:r fr: tne above sum =ari:ed tests is that the production recc=- biner wi:n its ass:::sted equipment.has beer. aemonstrated to be qualified for
- ne intended service ::nditions. As a final step, long-term recombiner opera-
- i:n 'tes:s are also planned to be performed.
l l [ 2-2
7 o
~
L SECTION 3
. TEST PROGRAM AND RESULT 5 .
Produc' tion unit equipment of the Wes tinghouse electric recombiner system has been subjected to' air flow, temperature distribution, thermal cycle, seismic, containment environment, steam pressure chamber, and electrical grhund. fault tests. These are described in this section.
~
3.1 A:R' FLOW IEST AND TEMPERATURE DISTRIBUTION TEST 5
-!hise tv: tests.were run on production recombiners to demonstrate enat the
- rifi:e configuration which controls air flow through the recombiner was
-::rre:: and permitted a minimum of 100 scfm air flow and also that -the tem-peraturas inL'the.recombiner reached ll30*F.
;...'. Air Flav Tests 7:r t. ese tests 'a special air flow duct, which fits over the inlet of the re: Om-
- '. mar. vas. nst,ructed. This duct, as installed on the recombiner, is sh:wn i n F . r.r e ' 3 '. .
- (a , :)
a r.<-- These test data are shown in FL:ure 3-2. Air flow measurements from production units 8 and 9 are also shown. 3-1
CLASS 3 6606-i,
- (a.cl
; ;ure 3-1 Electric Recombicer Air Flow Test 3 -2
6106 *3 4 't
- 150 140 -
b
. 130 - O 1
O 120 - _- C I0 -
\ K U
V1 ' I00 -- x \ g 90 - U DEsic=
, a ' i f LESEh]:
2
~0 - i
; (1 ) 3*0 AIR o = 0.075 L3/F73 70 - S UN67 40 1 0 UNIT NO 8 l
. j C UNIT NO 9 ec-2 f ! I 3 l 000 l100 1200 1300
. 1400 1500 TEMPERATURE ( F) j-4 4 i i F;gure 3-2. Recombiner Flow Rare i l' ! 3-3 l .. . - - - . - - . . , - . . . - , - - . - - - _ . . - - . - _ , . . . - . . . . - . _ _ - - - , . . . .
e
! - n-
-3.1.2 Temperatere Tests Two types of temperature measurements were made on production rec 0=biners.
1The first type shows . . . tne ' rec:=biner heater temperature as a function of :1:e, and the second snews the temperatures at various par:s of :ne rec =biner wnen the hea:ers are at re :mbina:ica :e:peratures (operating tarperature) .
.The first type of measuremen:s was made by energi:ing :ne svstem a: sligh:;y under :w:-thirds o f full power (48 'kW) and measuring heater sheata temperature at various peri ds o f ' time. The 48 kW value was based on tne operating power requirements outlined 'in WCA? 7709-L Supplement 1. pp. 4-12. The temperatures achieved :n the heaters for five production recombiners are 'snown n Figure 3-3.
This' sacks rec :bination tempera:ure is reached in appr:ximatelv two n:urs 2:
- his ::ver se:::ng. :: sneuld be neced tha: 75-kW capability is provided in
- he recam:iner ti provide grad operational flexibility to cepe wit.1 :ff-dusign
?;r -:;e se::nd :vpe of measurenents, a por:able thernc auple was :nnected ::
- e.r=ad:u:. ;ns:runen:.and pasi:icned at tae peints sh:wn in Figure 3 .. Durin:
- nese me ssiremen:3, the re:::biner was 2: recc=binati:n temperature. These da:a 3 . n :c.2 : :ne re:: siner exnaus: to perature is quite icw, wnich means g:cd 1
ax.n: if :he exnaus: sir vi:n cooling air is achieved.
... . . .. ::..____ ,.. , _ :_ ...nc
._ RyAL C. ..C t L.e .e5..
- 6. .s
~.e n.r:2. s e rvice life o f the reco=biner system will ' require periodi:
;i-:.13: - 1: 2: :ests :: demonstrate availability. This heatup and ::ald:wn
-:v:.in;'tr: . a: :nertal s:resses in the heater' frame and support s: rue:ure.
!. ;r;ve - :ne re::=biner ran sus:ain tais repeated cycling, the firs: produ -
i:n re::::iner was subje::ed to 80 heatup and cooldown cycles to simula:e
- nis repea:ed nea:up and ::aldown. (In a normal 40-year life, 40 annual tea: .: Ov; s' Ire 2n::::;ated.) After the test, the recombiner was enorcuzhlv
. u:2:::: r dama ge . '-
damage was found. The hea:ers were re:.:cved and ins:e::42. Agair no c anage w as found. t 3-4 1-
-._..__.u.--- - _ - - . _ - _ - - _ - - - - _ . . - - . . - . . _ . . _ . - . _ _ _ -- - _ . - - . - _ . . - . . . . _ - . . _- . - - - . - - _ -._. - -_._._.--
6#05-r2 o o_ i o
- .m O
i = s
- m a x -
_m _s a
= _5 =
_c* T z i g I #940<0 I
=
$ - t
- z s 1
I 1 I i . 98 b 5 t .- i -
. 4 -
2 ,7 E I. I-t l ! e
! l
[ , g 8
=
e, W O e o o 8 o o o o o co @ 2 N (do) 3801Ve3dH31 3-5 r
. . __ . . _ _ _ . . , . . . . _ . - _ _ . _ _ _ . . . . . _ - - , . _ _ . _ _ _ _ _ _ . - _ . _ . . . _ . _ _ - , . _ _ . _ . . _ _ , _ _ . . ~ .
6'06-10 I FI Ti - 125cp F T 3 . 7 2 - t04cp 73
- 238 F i p7 d (SU :10E TE"o) 7 -
172 4 4 C y IS - 36 F T 2T 76 - Il90 F C
*l II *
- T 7- isE0 CF EXNAUST% ,, ,
, A : :- ;ic
~
,s -
N555E; k x. ,, -- *
/
- <m-
- r il; C*-
k . b . n l,
~ h l / A N ;
1 y
- / 4 F:
l
? /y %
h - f,-
, % im 4.E s
i y, f
/ .. N
- y.
N o y' ' Oc E; E=:L:s.:E
> a;: :17:':
\
l . CLOW ORIFICE
- s. .: _ /
; e 3-4 Temce a ures Arouno Ree:: . :o , During Oceration 3 -6
( .- 3.3 SEISMIC TESTS
.e s tinghouse has es tablished the folicwing seismi: criteria for the Electric Recomb' te r Sys tem-For eitaer the Design Sasis Earthquake (D3E1 or tae Jperational Basis Ear:n-quake (03E) the equipment will be designed :: ensure taa: 1: does na: 1 :e its capaallity to perform its functions, i.e., re::mbine hydrogen vita :ae exv gen in the air. However, for the DSE, taere may be permanen: deformati:n provided taa capaaility :o perform its fune:ica is maintained. The re ::mb ine r will se suajected to tes ts under simulated seis i: a elerationa to de=cas:r2:e i ts aai' :v :: pe rfo rm i:s f une:icas.
$;n:e ne ele::ri: re::: iner con::al panel and pcwer supply cann : be =1:;.
ir.11*/:e d
- O deSCOs"Ta:+ sei331 capibilit". Vibrati0n :estir.g was 200sen as
- .e .e:a:d f ar ve rif ting :.te perf:enance Of tae equipmen: under eartaquike
. . - . . . . . . .......s. .e.. ........e
... . . . . . 4..e.*.s ..am.
..s .4...a 4
.~.es.e.4. . , . .e r 4. .s
. . , aa s ..-...e-
. . .._.. . . . . . . -..a..,.s. . . . .
- -.: 4:::::n de s.: ri:e s :ae seismi: :es: tag af :ae p ro ctype recombiner, ::we r
..... . . . . ...... 3.,. .e,... . . i u .ae4. , .,...,.
2... . . . . . . . . ..... 3 .,s ..,..s.. a.< .ae
. e..
su.7. ..e . . e ,. . . ..e..
- e : 4: Or::edure use d, and results o f :ae :ests. Seismi: testing of :ne
- ;.: :r ?.e ar:iner is des:ribed in paragraph 3.3...
......e..
. e 2 . e .a
- . - e::-biner sys:em consis:s of :ae f all: wing :hree basi
- ::n-
. :. re.;r iner, wni:h is located in :ne rea::ar centaine.ent building.
.. I' .e :ver sur:. .
e.ich is laca:ed in an auxiliary building.
! ". e : .:r:1 : ins., whi:n is located in either the auxiliary building
- :> rea::: :ntral raam.
3-7
-= n b
r; e i A description of each component follows : I e Recombiner The design of the ' electric recombiner is shown in Figure 3-4 It consists
- of a vertical metal duct which houses five banks of electric heatera. '
Surrounding this duet is a thermally insulated enclosure. A cop for ene enclosure is provided and inle: and ou:let flow louvers are provided as shown. The entire recce61ner is fastened to a skid, which is then fas:ened to - the reactor containment structure Typical startup time af ter a major LOCA is 24 hours; therefore, the uni: does not need to operate immediately after the incident. e Power Suopiv This cabinet, sh vn in Figure 3-3, is located in the plant auxiliary a:ild-ing and supplies p:ver to the recombiner. It consists basically o f ~3-kW, 3-pnase transformer, a silicon-con: rolled ree:ifier, and control c ::::: v. The purpose of_tnis equipmen: is to c:nver: from 3-phase delta inpu: p:ver
- 3-pnase, 4-wire wye output and to ::ntrol ou:put- power level,
~
-~;n:rol Panel This panel, snown in Figure 3-6, is used to control the power supply and c re a: Ou temeeratures from the three test enermoc:uples located in :he re:: biner. Ins:ruments counted :n :his panel include a power meter, enern:-
- .:;a read ut.. potentiometer, of f-on switch, and power available licht.
1.1. _ 724: 'r::edures . e p:ver 3.; ply and C:ntrol Panel
'!he ::ver. su:piv and control cabinet were tested at the same time at :ne Wes:ingh:use As:::nu: lear Laboratory located at Large, Pennsylvania. The-e;uit.en: vas vi':rt:ed in three planes, i.e. , vertical, hori: ental f r:n:-: -
- u., and .n ri::n:al side-to-side. Figure 3-7 shows the equipmen: ecun:43 ;
" : :na :es: sable.
3-8
6:06-i: 35-9/16- > c 26" M r , r , a 1 i i l I i
! s:a
,i I i I I l
l l I,l
. .s .. i
, s as:caura l i'
1i i Y FRONT VIEW S10E VIEW
~ 9. e 3-5 P:ner Sucply 3 -9
W 6106-6 h r 3 w
=r
% d e
C II ( 3 m h i --- T z .
~ A %
O o.x= g ,m -
. o = z -
L *
- O La ,
g j == . g :
"B ,
C ,;
% 6 w
~ O
** - =.
M
? 4 3
3 m. a M
- 3 "E
" M ham. O X N 23 w w e l2:
1 - Z w bs. Z 3 -
- 4
" W D i
E alt
- m
- L i'
i . I o _M e@ e w r ,e N 3 'O
6l06-20 h P, -r.!..,m 1
! ,A [(j'.< bit Y
(
,i
)
- y. /
-w .
.. .thku:
g
.. . 'fi
( t;:.
.\
j j i- , e
' C
'l fj lU g
E i e 1
) 28 W , ! i L ---
- g. __
,( j I I '"
3 i -
... ; - . ..- _.. ! . 4 d ,
\ r ;
, O
_ .I. .
- u. , ,
i l 3-11 l
ry-
* . Vibration Input The vibration input to the base of the. equipment being tested consisted of a sine beat type vibration as shown in Figure 3-0. Each sine beat consists of 10 cycles at the test f requency with the a :eleratton of "g" level increasing from :ero to the specified maximum and returning to zero in a
' sine wave fashion. Five consecutive beats were applied at es:h test fre-quencv, with an allowed maximum of two seconds between each beat. Figures 3-9 'and 3-10 show the maximum applied horizontal acceleration level of ene sine beat as a function of test frequen:v. These accelerations leveis are exrected to be much higher than the a: elerations that would be produce:
bv ene D3E in any plant location where this equipment might be locatal. These higa values were chosen to pre:lude the need for future seit-1: te4t-en: if tne equtement sa:uld be pur:nased far same plant locati:n vita v tv L:n seismic require ents.
- .;e sine :e at tests were performed at resonant f requen:1es dete rmine: :y a f requen v sear:n test fr:= 1 to 35 H: plus tne following frequen:ies
.;a te d in ene foll; wing procedure. .
(a.b . c) 4 . 1 l l l' i 3-12 l i
6106-9 l' A i i n 1 2 ' r A 5 2 q w 8 CM 3 w O ( / v N 3 . y e i
=
M 4 e' 5 ==
?
M E s . U
,'- 3 s
c h
~
- m !
= i v i 2 2 3
'b [
g b 3* s O A N a o
- _1
= ,
, I.
8 a 3 - { - i Z i r g >/ l r+A i I J- N m - i e k tme 5--
./ $
3-13
I-6106 1
- 4 .
r t x 3 7
- P ? !
i !
~-
w z ? t V I
- m xW .-=
i3C + g 6
- N *
.~~
L m O
^
O e e,
- e o.
* ** - O is,5) Nouva31333v 171Nozaos .
l i l l l 3-14 1
si:4-7 e m
- W m
- N m
- o m
A
- e N
R . l l - o _ _
= _.
_ x v z - _. a = x w N o.
- e
- e
- N I
l l l l ! l o
, 3 r N w y N
&. . o. ao. . . . o.
e o o o o If NO:;7a313MV 171N0Z180H 1 3-15
Ig I I I I
?
e 3-16
Y l, 3.3.3 Vibration Test Results Af ter each :es (i.e.. vertical, heri::ntal side-: -side, 2nd hori::n:a; fron:-: -ba i) :he equipment was tisuallr inste:ted f:r e:nini:21 damage. loose conne ::ans, and overa.,., appearance. .he
. ele::rica :un :icns were enecked af:er til the tests were : mpleted. The specifi: :ests cerf:rmei are described bel v.
e Con:ral Pane;
; media:e;e after :ne tes: a .i;' ival: input s;gnal vis ime: sed on t..e
- nerm;::ur'e. re a d: ut instrument. *: snewed the instrument was in :pera;. .
- nli:icn. A -i:r: 1m: signal was :nen. imp; sed :n the p;*eer .e:er an: 1:
e24 le :ns:r2: 2: :: :e in aperating :andi:t n. (!he rever meter is 1:. 2... 2
..a
.. . . _e.,.
. - .... .~...,. . e a s . ...
. . ., s .. .. . ,. ...e..
.u..u. .. . . . 2 e..
.r . .c... . .. 2 ..a.3 . . . . ..
~
- .c : . :..;e.nz :.:eae : .e : .s . :ne equipmen: vas re:arne: ::
. * . ..a
..a*.
. : 3 . . .. . . .......3
. . ....3 . a _. . 1..s.. . . ,
. e.e 4... ...15 . e. 3 ... 2 .4 4.
. . . ...,U.. ....
,,,3.....
1.. e ..w4 g.
. . . . . . . . A.. t . .J. a...
. . . .. : w .c, 4.
.. , .r e ,. a . e...,.. . .4...<.-
- - - 12 e.:r2:::- : cst. 4 tes: voltage eas are'.ied :: :. e ineu: ter.ina'4 . .
- , - - .- 4 . - . in: e outeu: vas . ant:Ored. !ae equipment was f:un:
.t..
. .. ..o....
. . . . . . . . . e
. ., .t .4..,,
. .. ..,s.
. . . . ..e
... ,r ....
.e. . .. .. .. . .. ...as su.... . . . . .
- 4: ..:
-. 4 u 7:res: H1'is Labora::rv and tes:ed vi:n : .e ::ntr:. r2n=;
.- -e -. r. A lin 1: vas found :: Operata sattsf2 :;riiv.
e - _.-;. - . .r. :. a1 side-to-side tes: it became apparen: tha: ad:1:::n d
- r2:r4 4; : .e ::rners of the exnaust louvers vould gre.1:1y streng:non a ...: . - :ref:re. : ese braces were added and. tne hori::ntal side-: -side
- 24: v As re;ea:e:. .'.e horizontal back-to-front tes: was nen run.
(:: r....:u :e: : .t; :ne a::eleration levels specified in Figures 3-) 2nd
.. .: r :,.ee::: .:. taese tests to determine the margin in the desig..)
- e :; a : c . '. after e+:ing. the ree mbiner was visually inspected for
. : .an t : 2' :e:eri:rs: tan and was checked electrically by measuring :ne 3-17
V 1 l resistance between the input terminals and earth ground. The rec biner was in satisfactory operational condition. Following tais, the equipmen; was returned to Forest Hills Laborat:ry and disassembled to permit inspe:- tion of the entire machine. The heaters were individually tes:ed. Inspe tian revealed no disabling damage t; the recombiner from the seismi test. Some thermal insulatica whica was atta aed :: the heater f rame b. wire fasteners became locae. (In ene production mcdels this insulation is car.nud in stain;ess s:ee; :: preclude tais possibility.) The insulatica cover sneet underneatn on tae top plate of the recem:iner aad vibrated loose. (In the production model, the attachment bolt s h r: been in:reased fr:: 3'd-inen diame:er to 3/4-inch diame:er and a :ne- e : 4:ameter pipe mean:ing Tas been added f: addi:icnal lateral restraint.
- . Jama;2 :. ta: re:: ;;ner s:ru :are :: wiring was n::ed. A;' teaters sere tes:el an ::an :: be .a g :: pera:ing ::nditi:n.
..... 5e:sm;; sest;ng :: Pr:da: icn Re::mbiner
- .e : ; rs pr::a::!:n re::mbiner was subje::ed to tae sine beat vibrati:n test
- 1er:.stra:e tae seismi: adequacy o f tae production recombiners. (3 races
.....ar :: :a:se al e: a :ne prototype were in:Orporated in ne design a r i;r a- - ..;.. ae resonance frequency test was performed and tae re :: .-
- ..er eis :nen v' b rated in the two hori: ental planes (fron:-to-back and
- t. 2-; - 4 * :e 6: res:nant frequencies plus predetermined in:ermediate fre-
.- ..-4 . ::.= r t:1:n levels we re en:se snown in Figures 3-9 and 3'.. .
- .s . - :.;il t25: eas taen performed wai:n was cae same as tne h:ri::n:a; sx:=:: : 1. *; era:::n .evels were 4/ 3 ene value sa;wn :n Figures 3-9 an: 3-12. i
' .. w; : : '. e seismi: tes tae recombiner was examined and sh0wed na signs :
+.e::rt:a.' :: ce:7ini:2. damage. It was : hen operated at re combinaticn
- 3 reri:. + ina : - 1;r :1:w tarcugn :ne unit was measured. 30tn :hese c a e : r. s
...we: ~. ; : 2:a ge :: : .e re;;mbin:r. '
3-13
3.3.3
.tse.1. . g ..o ., P r., 4. . . .-...4 . 3 . .e seis.4 . . . .. . sa..,..
rr.. . 2... . ,.,n..,, .... .=a .e. The produ :1cn pcVer supply and ::ntr:1 ;anel ver= su:fe::ed ta :ne sa e te5 .a s. . . e pr ,4. wJ 4..,3 r e , .., . .4.
. .,.. e r . A.. ...e d.4 .e
. .. ... . ..e
... .e3 4
.. . l s. . . . . ....d .
. . . , ..,4.. . * ' '
.)
. ..' r-*==--**7 ** e =' =^ ~*-' d' '
- e ** 34 "'w'" er. 4
* - -
- 3 *- *.*.. ' p .a s..e me.i.' . .d0... . .23 n J ,. G .4 4. n .o n e , e.,. ..d r. .e l s. . .. . . . . 2 .- 4.
4 . . 4 a 3 .. l.+.1 i ..
- s. .. .. ... . . .. . e ... ..s... 1 .. . ... ,..
l ., ., s. e .c,.. 4.S ..... 4,g ,.es. .4 4 :
. . . . .. . . . . . . . . . . . . ... . ,, . . .. 3.....4. . . . . . .. ,,t,
. ... .e ls...
. .T e 4. n s... .r .. .. .e . .. . .3./.,,.e.........,
.s. . . . . . . . . . . . . . . . , 4., 3w s e .42
. . .. .. d .4e.4 s.g .u- .., 3 4
.. ... ._e r-'CI . , . . .
i e..- 2.4 c..
.e re es.d.4 se..
.. .....e s . . u . .4 w. ..._.
....s,... ....a. .
..3= $.A. (... .c ...e .... c. .
i... . .4 . ..,
- 10. e e3 ... ..
J4..
. . .3. ...c .e t s. r
... . . . . 3.4 . . . . . 45 3.1.4.J
. -.e .
iv ,. ./ . .. . . . ,..
.. . : ,.= .-us.s ... . . . . .
.a- ....
.s..s.. ,,.... .
..c ... . ...
. . . . . . ..s...,..
.s . ....... -
.. . ... . ., 3 3...J,.4e .
s..e.. , 1 .
. . . . .- - .. us........a.. ...e .
2
. . . . .. . e s. . e r . . ..e
. i .ve .t c..s. . .
. . . ..e..... . ,
.a eu.. . ,...u....,.s..,
.. .3 J D ,4 e . e .a . ,
....e. ....
.._ .. . . . . .... e ... ; . - 2.- . ..e .. e. s ... a
.,r 4
... . ,,3.f, .ae e.u s ..e..
r ... . . . o. s.. .. .
. i serp:. .. : ; s : . ] .i pressare 2nd spray :ransients. :n a;; ;1. ser-
.- ...... ,. .d.4 .
.. , . .2.
Je $ . .w 4. 4.d . .., ,
.4. . . ./ . e y . s,.. ... CL
. . A p es..s .
. t.
. . . .4 .. ..s .. s. ..
. * . 4 ......
... .. ,..s.s ..
.c 31 J,..c .e
..eis
.a.
.cisc.. .4
. ...'e. . L. ... .. . . .... . .
.-,s.3 3. s. s e .' 4 .3.
.- 3, .. r X .4 .. l. . e . .. . s e ,c.. .we..
6 L. .. 4 .s . .4. .w . .
. c., ,.
. .= ~;unte . 5 :ne '/e3Se :en*er.,ne 13 h 0 7.4203:3. (See
...220e .-
. . . , s: s. ....
1...... . . ,
. . . . .d 5 3 e .-
.. .t.....
7
. . . . ....e
... S . e..
.. ., ; <l
. e .. .
. . . . - . . . 3..,. .
..e . . e s.s . e . . .cn3 ,34 s J .c e
. . . . . ... . . 4. .' e.. . . 4.u ..
r.s3 4. ...
./s. s 3 e 1 ,. ., 3 ., .J ..
. . . ..; . ... c, <J . . .-s.,
- 4. ... .'> 30 .. .
. . . . 5.
a ... .. 3 ,.s. .. e . ., s s ...v. ... s.4.... 1-..t, 1
. a ., ... s .u.. , . . .. . ., . ,.4w. . . ... .
- - .: : 4 s s e l. '!i ll i /01: :;gi*al read;u and re:Ordi.a e;..r-
.- . t'.2:.e
. ar. : e.s usel :a re::rd te peratures and pressures .n :.c
. 41 . : ,s . s .. .. . ,
,e
. .. v s .. e ., .. .. ,. .. .. ..,. .. .. .
3-19
3.a.2 Equipment Tes:ed To demons: rate enat the recombiner will functica in ene pressuri:ed steam environment, components waien might be af fected bv rapid pressuri:ation and by hign pressure stean were tested. These camponents were:
- 1. Heaters wita junction boxes.*
- 2. Electrical junction box.*
- 3. Thermoccupies on heaters.*
.. !aermo: uple junction box and inter:onnecting leads. *
- 3. Electrical cabling.*
- n. Tvpt al door panel.*
oOuVer!.*
-: :es: :ne 1:aze equipment, a spe cial neater f rame was designe d an: ..':.
'e frame acids : ur he2:c: banks (wni h includes neir jun::1:n :xe4 in ;
- .erm;;;u:;esi. !ne ele: rical 4 un :ian box and I/C 5:x were 2::2:.ed :.
4 :e .: :ne neater frame and ne ele rical cablina and !/C leids eere ; -: 1...
'- a manner similar to :na: af :ne o roduction re::mbiner.
. The : - Art.u:.:
at: 2n: :ne neater jun::i n boxes was made similar to the producti:n ::e; r.: i : cri:11 '. uve r was ins talle d. A door p:nel was also placed in :ne press.r-ca se; :: verifv ::s ability to witastand external pressure. The re::n.: nu:
.;;2: frame in tae pressure vessel is sh:wn in Figure 3-11 :he data 1: uia - .
- ..- e;u;: men; is snown in Figure 3-12.
, - . .u: P r; ;r am.
- e :es: :::::a consis ted of six tes: runs at pressures and temperatures
- n2: re: resent maxi.um an:icipated post-LOCA centainn.ent candi: ions. A su..arv
- ' : ese tes: rans ;s as f ollaws :
- ss: ':. . Purpose
. E xr . c r .1:: r v - Af ter pressure cycle caeck f r any physi:al dam.10.
- .elters and resistance to ground of leads during and af ter pressuri:ation. Check ou: test facili:v.
'These items previousiv nad been subjected to 80-cycle normal service life
- nermal cycle test.
3-20
~i l
l l slos-17 I l i l l LECTRICAL PENETRATIONS f e j l r PRESSURE VESSEL ! l .. .
/'
l I[.<C.4 -
, ,.s
,' >e.
i ! M EST FACILITY
/
! INSTRUMENTATION d . j
. .2 r T/C TERMINAL 80X i
- W i
m j h i > j l' - m l i t _ ._ ., g JUNCTION 80X , 9 1
't lI u.
l
. w,
. :$ l
.5..
i Figure 3-11. Heater Frame Test Auembly Imtalled in Pressure Chamber I 3-21
1 1 I' l elos-ie l ! l l 1 ! ! l j i l l l \ 1 . L' h, ~~ - . .. . i l 4' *~
***]** .ta % -
l 9L. - s., ., V . i 4 4P-*,,,p,,',j,,, l"** e ver
. l7. -
l , gn j. -e
- ..n rtt , ohu y y ! i
" f,' t p .
( Istn
'i .'f' k . -
ve~ p j -) $ .*-
- {
- '
a- . sn
.e* ._
. p - , %. .y ,
[ l
. . ,hi',
,;n 4
t.
,,p3**)'.
4 . .. i
;L
* ~~~ t g.*
' &' </ !
. j
, . . . . . -%, u.< . . -
; '#- }
,.i. , .
.y -
e Figure 3-12. Data Aquisition Equipment I 3-22
_: 1: __ - . - Test No. Purpose 2 Test heaters by applying electrical power to heaters while they are in a high steam pressure environment (69 psia), moderate pressure (35 psta), and law pressure (20 psia) with containnent spray added to the steam.
- 3. Tests simulated containment environment transient by subjecting heaters to the 24-hour containment post-LOCA pressure t ransient and then applying power according to the proposed startup specift-cation. Use containment sodium tetraborate spray with steam.
4 Retest simulated containment environment transient, but use sodium thiosulfate spray (1 w/o) instead of boric acid containment spray.
$ Repeat Test 4 with hester terminal boxes vented to drver.
6 Ileat the heater aheaths to 350*F to 400'F by applying power before the steam injection. Maintain power during and after steam injec-tion. A description of each test is as follows e Test No. 1 Prior to initiation of this test, the contral panel, power supply and heaters were checked by energising the system at approximately $ kW for ten minutes. Thermocouples were checked for operability. The pressure chamoer was then closed and chamber pressurization was initiated. The pressurization schedule was as followst (a,b.c) 3 23
e Test No. 2 Heater operation was tested by applying power to the heaters under steam pressure. Again the heaters and thermocouples of the system were checked out prior to chamber pressurization by applying 5 kW to the heaters. The T/C's were used to verify that they functioned. The pressurization and test procedures were as follows: 1 (a,b,c)
-ws 4
e Test No. 3 . In this test the heaters were first connected-to the power supply with the pressure vessel open. Forty kW electricai Bower was applied to the heaters for ten minutes. Thermocouple values were noted. p #h
# , \
w kr 4 24. C
,, .~-
. . - - - . = -
The heaters were then deenergized and the pressure vessel was closed. The following pressurization schedule was followed: (a,b,c)
- Test No. 4.
Test No. 4 was identical to Test No. 3, with the following exceptions:
- 1. Sodium thiosulf ate spray was substituted for the sodium tetraborate used in Tes t No. 3.
- 2. The maximum pressure achieved in the rapid pressurization phase was 77 psia in ten seconds.
e Tes t No. 5 This test was the same as Test No. 3 except that the heater junction boxes were vented to a mesh-filled container. There appeared to be no advantage in this vent scheme so it was removed. 3-25
r~ --
- Test No. 6 This test was run to demonstrate that the recombiner will func ion properly if a LOCA occurs when the recombiner is electrically energized. The follow-ing schedule was followed: _
(a ,b , c) 3.4.4 Test Results The following test results were obtained:
- 1. Each test was successfully completed and all test objectives were attained.
- 2. Inspection af ter each test for electrical damage revealed no damage to any of the equipment. This inspection included ground fault checks, continuity checks , and resistance checks on each heater. Physical inspection of the system, including junction boxes, electrical cabling, and electrical junction boxes showed no malfunctions. The door panel and louvers were also inspected periodically and showed no damage.
- 3. After the test series was complete, the heater banks were removed from the test f r ame . Each heater element was tested in each heater bank by applying power and noting that each element heated (an element is one U-shaped heater) . All elements heated up. The electrical cabling was inspected, along with the T/C's and electrical and T/C O
j unction boxes. No damage was found. 3-26
F" The heater banks were then completely disassembled. Visual inspection of the individual heater elements revealed that 11 out of 240 elements testea had sustained nondisabling sheath damage at the cold end. (This is located in the nonheated region inside the heater assembly insulation block as shown on Figure A-2.) The damage consisted of a short split in the sheath material. The damaged elements still had good electrical resistance between sheath and electrode and the electrode and filament were undamaged. The heaters continued to fulfill their function. Even though the elements lasted far beyond their anticipated life, the damage to the sheath was investigated further. 3.4.5 Confirmatory Steam Chamber Tests To confirm that the sheath splits occured af ter a number of simulated post-LOCA transients, the steam chamber tests were repeated on another set of four heater banks. The test procedure used in Test No. 3 was followed and af ter each post-LOCA transient, the heaters were removed from the test chamber and completely inspected. As expected, no damage and no clad splits were found af ter the firs t pos t-LOCA t ransient (this demonstrates the heaters meet the requirement of availability after a LOCA). To confirm the reserve life left after the required post-LOCA transients , these heater banks were subjected to a series of further transients using the test method used for Test No. 3. No clad splits were found until the end of the fourth post-LOCA transient. This con-firms the design margin available in the heater elements. (A fifth post-LOCA transient was then run to provide further information and more cladding splits occurred.) An investigation by Westinghouse Research and Development Center confirmed the cause of the split was due to partial Mgo conversion to Mg(OH)2 which was caused by repeated application of high pressure steam to the heater elements. 3.4.6 Conclusions The steam chamber tests demonstrate that the heater elements plus other equip-ment described in paragraph 3.4.2 have a considerable margin over that required for operation af ter a single post-LOCA transient. The re fore , the recombiner meets the requirements for operation after a LOCA transient. 3-27
Y 3.5 GROUND FAULT TEST i The recombiner electrical system contains an isolation transformer whose pur-pose is to isolate the recombiner electrical system from earth ground; thus, a single ground fault in the system will not result in failure of the recom-biner. To demonstrate the effectiveness of this system, the recombiner sys-tem was operated at full power and a direct short to earth ground was activated by closing a contact in a cable leading from one power conductor to earth ground. The recombiner was also operated over the full range of power with the earth-grounded power conductor. As expected, no effect on the recombiner power was detected. 3.6 IRRADIATION TESTS The purpose of this program was te demonstrate that the electrical components in the recombiner, which may be adversely affected by irradiation, will per-form their pos t-LOCA function af ter irradiation. Type tests were conducted on the electrical components to augment the irradia-tion information presently available on these components. Production components were subjected to normal life tests, post-LOCA environment, irradiation, and post-irradiation tests. 3.6.1 Description of Parts to be Type Tested All electrical components furnished with the Westinghouse electric recombiner, which may be exposed to post-LOCA environment and which use electrical insula-tion were tested. (Metal parts, such as metal bus bars , connectors, and bolts were not tested.) The following parts were tested. Unless otherwise noted all these components had been subjected to the preaging, which consists of 80 heatup and cooldown cycles followed by 6 post-LOCA steam pressure and spray cycles, a. Power Cable - used to connect the heater banks to the electrical j unction box. b. Heater Connector Wire - This stranded cable connects the heater element bus bars to the heater bank terminal block. 3-28
i
- c. Heater elements - U-Tube Incoloy-800 clad electric heaters. Overall length approximately four feet. (Irradiate the connector end.)
- d. Thermocouple and extension wire.
- e. Heater Bank Electrical Terminal Blocks. (Subjected to six pos t-LOCA transients.)
3.6.2 Test Program All test material except Item (e) was preaged to simulate normal service life and post-LOCA steam pressure, containment spray and containment temperature. Preaging consisted of 80 hestup and cooldown cycles in a production recombiner ' to simulate normal service life testings. Six post-LOCA containment steam pressure, temperacure and spray transients were then conducted using a large pressure vessel and steam source. The preaged components were placed in a gamma irradiation chamber at McMaster University, Hamilton, Ontario. A total dose of 2 x 10 rad was administered to each material item. The following conditions prevailed in the irradiation chambe r :
- a. Temperat 2re - 24*C + 1*C
- b. Humidity - 32% + 2%
- c. Irradiation Rate - 0.33 megarads/hr for all items except (e), which was 0.8 megarads/hr 0 8
- d. Total Dosage - 2 2: 10 for all but (e), which had 2.2 x 10 rads 3.6.3 Post-Irradiation Test Program The following examinations of these components were made following irradiation.
(a , b . c) 4 3-29
yr i 3.6.4 Test Results
- a. Power Cable - Phase-to-phase resistance 2 megohm. Phase-to-outer jacket resistance 1,000 megohm. Passed the high potential test at 1320v ac at 60 Hz.
- b. Heater Connection Wire - Insulation resistance measure . Wire operated in heater and passed 1320v ac @ 60 Hz high potential test.
- c. Heater Elements - No damage to heater noted. Heater operated during and after post-LOCA transient.
- d. Thermocouple and Extension Wire - T/C and extension wire operated afte'r irradiation and post-LOCA transients.
- e. Heater Bank Electrical Terminal Blocks - No visual damage noted after irradiation or after post-LOCA transient.
3-30
pr l o SECTION 4 REFERENCES
- 1. J. F. Wilson, " Electric-Hydrogen Recombiner for Water Reactor Containments ,"
WCAP-7820-L, 1971. (Westinghouse NES Proprietary.)
- 2. J. F. Wilson , " Electric-Hydrogen Recombiner for PWR Containments ,"
WCAP-7820, Supplement 1, 1972.
- 3. IEEE Standard 344-1971, "IEEE Guide for Seismic Qualification of Class 1 Electric Equipment for Nuclear Power Generating Stations ," Inst. of Electrical and Electronics Engineers, Inc., New York, 1971.
4-1
r, ", -_ ___ . . _ . _ z 9r
, e
., APPENDIX A DESCRIPTION OF THE ELECTRIC HYDROGEN RECOMBINER A.1 DESCRIPTION The electric hydrogen recombiner is shown in Figure A-1. A summa ry o f typical design parameters is presented in Table A-1. The recombiner con-sists essentially of a thermally insulated vertical metal duct with metal-sheathed electric resistance heaters provided to heat a continuous flow of containment air (containing a low concentration of hydrogen) up to a tempera-ture which is sufficient to cause a reaction between hydrogen and oxygen.
Air and its contained hydrogen enter the recombiner and flow up through the heated section and out the top by natural convection. The intake of the recom-biner is located only on one side and the exhaust ports are located above and on the other three sides of the recombiner. This arrangement of intake and exhaust ports serves to ensure that for downflow air currents external to the recombiner, there would be little tendency for recirculation of the recombiner process gases (from the exhaust back into the intake). I No circulation fans are required and the desired flow rate of air is established by providing the proper size inlet flow area through an orifice plate at the bottom of the recombiner. Thus, with the air flow rate reguir ed by a fixed orifice and with the supply of electric power determined by a control station outside the containment, controls are not needed inside tne containment. Heat added to the containment air by the recombiner is removed by containment cocl-ing systers already available for other much larger heat loads so that the containment air temperature will remain essentially unaf fected by the reconr biner. The electric hydrogen recombiner uses conventional type electric resistance heaters sheathed with Incoloy-800, which is an excellent corrosion-resistant material for this service. These heaters, which are shown in Figure A-2, have A-1
l
-l 6106-5 ll l
t d A EXHAUST h p
,'/ 1 s
, r ELECTRIC
, e A<
g,r e gf gh
, : ~'% INTAKE C00Ltug
'O
+, / %
% CUTER ENCLOSURE N .
% PREHEATER
\- FLOW OP.! ICE SKl0 f'9ure A-1, Spectric Hydrogen Recornbiner A -2
y- - l l I TABLE A-1 ELECTRIC HYDROGEN RECOMBINER TYPICAL PARAMETERS - Power (Maximum) 75 kW Capacity (Minimum) At 1 atmosphere 100 scfm Heaters
-Number 5
-Heater Surface Area / Heater 35 ft
-!!aximum Heat Flux 2850 Btu /hr-ft or 5.8 watts /in.2
-Maximum Sheath Temperature 1550*F Gas Temperature
-Inlet 80 to 155'F
-In Heater Section 1150 to 1400*F Materials
-Outer S t ructure 300-Series S.S.
-Inner S tructure Inconel-600
-Heater Element Sheath Incoloy-800 Dimensions
-Height 9 ft
-Width 4.5 ft
-Depth 5.5 ft e
A-3 h . . . . .. _ _ _ . _ _ . _ _ _ _ _ _ _ _ _ _ _ . _ _ _ . . _ -
6106-16
,% . t .
" ~
\
b , .
. a
{. ' u ma>l, . . m a m :rg. . u -
. "\ *
- ~.
~f
~
j< _ . . .
}.- -
---n .
_ m _ _ -, _ .- s u nc .- - - . Figure A-2. Prototype Electric Hydrogen Recombiner Typical Heater A-4 i
!I been designed to operate with the same sheath temperatures as commercial heaters , but at power densities much lower than normal. Each bank contains 60 individual heating elements. Operation of the unit is virtually unaffected if a few individual heating elements fail to function proper 1v. The major structural components are manufactured primarily of 300-Series stainless steel, except for the base which is carbon steel. Incolov-800 is used for the heater sheaths, and Inconel-600 for other parts such as the heater duct , which operates at high temperature. A.2 DESIGN CRITERIA The following are criteria considered in the design of the electric hydrogen recombiner for pressurized water reactor containments :
- 1. The recombiners are designed to sustain all normal loads and accident loads including seismic loads and temperature and pressure transients from a loss-o f-coolant accident.
- 2. The recombiners must be protected f rom damage from high-energy mis-siles or jet impingement from broken pipes.
- 3. The recombiners must be located in the containment such that thev process a flow of containment air containing hydrogen at a cencen-tration which is approximatelv typical of the average concentraticn throughout the containment.
- 4. The recombiners must be located away f rom high-velocity air streams, such as could emanate from fan cooler exhaust ports, or they must be protected from direct impingement of high-velocity air streams bv suitable barriers such as walls or floors.
- 5. The recombiners are designed for a lifetime consistent with that of the reactor plant.
- 6. All materials used in the recombiners are selected to be compatible with the environmental conditions inside the reactor containment during normal operation or during accident conditions.
A-5
f
~
N} APPENDIX B DETAILS OF RELATED TOPICS This appendix elaborates on certain topics which have been covered in earlier reports on the electric recombiner. . B.1 SPRAY TESTS ON PROTOTYPE RECOMBINER The spray tests conducted on the prototype electric recombiner were performed using spray nozzles in the simulated containment. The nozzles have an average droplet size similar to that expected in an actual containment at about the operating floor level. The average droplet size in the test (50 percent of accumulated volume percentage) varied from about 350 to 500 microns, depending on spray pressures. These data are based on the nozzle manufacturer's pub-lished information. B.2 HEATER ELEMENTS The heater elements used in the electric recombiner are a manufacturer's standard design. To provide a conservative design for the recombiner, these heater elements have been greatly derated. For example, the elements are rated for 1600*F and have a power rating of approximately 30 watts per square inch of surface. In the recombiner, the maximum power ranges from approximately 1 W per square inch in the upper heater bank to 5.8 W per square inch in the lower heater bank. Normal operating power is about 70 percent of these values. Other parameters specific to the heaters elements are: (a,c) B-1 C
B.3 ANALYSIS OF TRANSIENT PRESSURE LOADS The purpose of this analysis is to verify the structural adequacy under LOCA containment pressure transient loads of large sized parts of the production electric hydrogen recombiner. Their size restricted testing and verification by means of the autoclave test program. The electric hydrogen recombiner is basically an open structure and only small pressure differentials are developed across major components of the assembly; however, there are some individual component parts which are not as open, and these parts may be subject to significant pressure differentials. Importantly, those component parts which may be subject to significant pressure dif feren-tials, s.g., the door panels, the heater assemblies , and the electrical junc-tion boxes, were tested in the autoclave test program and were demonstrated to be satisfactory for the anticipated blowdown conditions. The assemblies not tested are those which are large and inherently open; these include the heater frame assembly, the outer frame assembly (which includes che inlet plenum), and the outlet plenum assembly at the top of the recombiner. Each of these essemblies has been analyzed and the stresses resulting from pressure differentials were found to be low in all cases, as expected. The analysis of the heater frame assembly, which has the highest stresses (even though very low) is presented in the following paragraphs. This analysis is presented in two parts: (1) the determination of the pres-sure acting across the heater frame assembly walls; and (2) the determination of the stresses in the heater frame walls resulting from these pressures.
- 1. Pressure Loading Analysis The heater duct and frame assembly has a volume of about 32.3 ft and an inlet area of about 0.688 f t .
The external pressure across the walls will be conservatively calculated as follows : Assume that the pressure inside the volume follows the external p ressure , i .e . , the containment pressure, with no time lag. Determine the mass flow rate into the chamber to keep the internal pressure equal to the external pressure. Determine the pressure drop across the inlet area required to develop this mass flow rate. B-2 - ~
7 (a,C,e) B-3 L _ . . .
r.. _ _ 7 ~ 9 For the case of the heater duct and frame assembly, where V = 32.3 ft3 , and A = .688 ft ; the differential pressure calculated by this conservative method would be 13.9 x 10~ psi, which is small as expected.
- 2. Stress Analysis The heater duct and frame assembly is a box structure with 1/8-in.-thick Inconel sheet metal sides, reinforced at the corners with thicker,1/4-in.
-Inconel. The stresses in the box will be conservatively calculated by analyzing'a strip of unit width with simply supported ends subjected to a lateral loacing of ap* and an end load, P. The maximum stress in the strip is given by the formula
- S= + , xk y _ API' t' EI where P:= compressive end loading = 13.9 x 10 -3 lb (22.25 in.)
in.'
= 154.8 x 10' lb/in.
A = area of strip - 0.125 in. /in. M = bending moment for a simply supported beam under traverse loading E = modulus of elasticity of Inconel-600 at room temperature = 31 x 106 psi I = moment of inertia of strip =
= 1.61 x 10 ' in.'/in.
*R. J. Roark, " Formulas for Stress and Strain " 4th ed., New York, McGraw-Hill, 1965.
B-5 k
A s a B-4
T t = thickness of panel = 0.125 in. i a = coefficient depending on beam support and loading conditions
=
0.104 for a beam with simple supports and uniformly distributed load The bending moment is given by: g , wi~ 8 wne re w = load per inch of length = ap* = 13.9 x 10' b in. i = maximum length o f beam = 37.50 in. (side panel)
't = L3.9 x 10-in.&( . O in.)
8
= ,.4,,, 15-in.
i Ihe maxitium stress is :
-3 5 = 154.8 x 10 0.125
. 1 6(2.44) y _ 0.104 (154. 8 x 10' ) (1. 406 x 10 ) (1.56 x 10' )
6 ( (31 x 10 ) (1.61 x 10) / Th us , S = 940 psi This stress is more than an order of magnitude less than the material yield strength under blowdown conditions and is , therefore, acceptable. The other large assemblies such as the outer frame assembly and upper plenum assembly are also quite open and have similarly low stresses under the blowdown pressure transient. Thus, the structural adequacy of these large assemblies under LOCA containment transient pressure loads is considered to be verified. B-6
'}}