ML19274D195
| ML19274D195 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 11/30/1978 |
| From: | Colwell J, Levijoki E, Nielsen D PACIFIC GAS & ELECTRIC CO. |
| To: | |
| Shared Package | |
| ML19274D191 | List: |
| References | |
| PROC-781130-01, NUDOCS 7901150241 | |
| Download: ML19274D195 (38) | |
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a Pacific Gas & Electric Company San Francisco, California Electrical Engineering Department Seismic Test Procedure For Diablo Canyon 125 VDC Switchgear Distribution Panel Mold Case Circuit Breakers Date: Nov. 30, 1978 Approved By:
E . W.Levij oki (c'. d w rj J.E. Herbst D. Nielsen t_ ~
J . W.Colwe ll l~
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Test Procedure 125 VDC Molded Case Circuit Breakers
- 1. Description of Equipment 72-2125 - 20 ampere , 7.T.E. HE2-B020 72-2127 - 20 ampere , I.T.E. HE2-B020 72-2125 - 70 ampere , I.T.E. HE2-B070 72-2126 - 70 ampere , I.T.E. HE2-B070 72-2111 - 150 ampere , I.T.E. JJ2-B150 72-2211 - 150 ampere, I.T.E. JJ2-B150
- 2. Test criteria and Plan The Seismic Testing and Monitoring shall demonstrate the following when mounted on the seismic test table in the same configuration as in the actual switchgear in the Diablo Canyon Power Plant.
a) That open breakers remain open and do not close during seismic testing.
b) That closed breakers remain closed and do not open during seismic testing.
c) That closed circuit breakers continuously carry 60 to 80% current during seismic testing.
d) That voltage and current of closed breakers are continuous during seismic testing, e) That power is not interrupted to the load by closed breakers tripping.
f) That inadvertant loads are not added to the D.C. bus by open breakers closing during seismic test.
- 3. Test Procedure and Set-up This test procedure requires additional seismic testing of the above breakers as follows:
a) The Molded case circuit breakers shall be mounted in the same configuration as in the Unit 2, 125 VDC Switchgear.
b) The molded case circuit breakers shall be tested for one SSE in both the x-y and z-y directions with the breakers open, and 125 VDC potential on the input terminals. Breakers shall be monitored on a strip chart recorder for voltage and current, and for any closures during the test.
c) The molded case breakers shall be tested for one SSE in both the x-y and z-y directions with the breakers closed and energized by an average 60-80%
load of breaker rating. If the D.C. source battery or battery charger supplying power is not of adequate size to provide DC power, use 125 VAC power during the test. Breakers shall be monitored on a strip chart recor-der for voltage and current, and for any tripping during the seismic test.
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d) Voltage and current shall be monitored on digital meters, and recorded for a permanent record. And openings or clos 2res shall be logged for permanent record.
e) All terminal connections , loads, breakers being tested, power being supplied etc. shall be recorded for permanent record for future reference, f) The molded case breakers shall be tested to the TRS level as recorded by accelerometers No. 3, 4, 5, 6, 7, & 8, pages 265 thru 270 and 275 thru 280 of Wyle Laboratories Report No. 58255 dated April 19, 1978. Control accele-rometer 1 & 2 TRS responses at the SSE level are shown on pages 261 thru 264 and 273. '
Alternately test to malfunction on succeeding higher and higher table input.
Ref: Paragraph (5) page 3-38 of the SER, Supplement 8.
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I. ' ' TEST REPORT neront No.
58255 scirNTine savices a sYsims onour oun ms No.
HD 58255 wtsruN ottRAT1oNs, NoRCD FACIUTY con m cr YOUn P. O. NO. 5-61-77 PACIFIC GAS 6 ELECTRIC COMPANY 77 Beale Street 34-Page Report San Francisco, California 94106 oars 28 November 1978 ADDENDUM 1 SEISMIC TESTING OF SAFETY-RELATED ELECTRICAL EQUIPMENT FOR PACIFIC GAS & ELECTRIC COMPANY
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E o ,, . o DYNAMICS STATE OF CALIFORNIA DEPARTMENT COUNTY OF RIVER $1DE J. Anderson ,g,i,, ,,3F 8*0r"-
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deposes and says: That the information contained in this report is the resW of complete and carefuuy conducted testand is to the best of his knowledge true H. Patterson sad correct in all respect
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L. F. Goad su - R be or Nov. ,i, 78 al atary rubiac in and toe the covaty of Ritrude. state of castrornia LCAS-QAR VERIFICA110N OFFICIAL SEAL CATHERINE C. KELTY NCTAAY PUBUC - CAUFORNIA
@v2 t'VEU'0! COUNTY My com en res Pit 14. 1979 QUA1. fry CONTROL A. Heeseman
g W L.ABGtAM1B REPORT m 58255 f SCIENTIFIC LAVICES & 5YSTEM$ *r.odP g
WESTERN OPERATIONS NoRCo FACIUTY PAGE NO Addendum 1 SUMJARY This addendum reviews the mounting r...thods employed during the seismic testing of the safety related electrical equipment. It then compares this to the actual mounting methods employed in the Diablo Canyon Plant for determining the adequacy and con-servatism of the test mounting.
W LABGtATWtlE REPORT W 58255 i scene stRvicts a systrus onovP WESTERN oPERAtloNS, NoRCo FACIUTY PAGE NO 2
Addendum 1 GROUP 11 Diesel Generator Excitation Cubicle Test Mounting .
The diesel generator cubicle was skip welded on the inside of the 12-inch -
channel base frame to a 1-Inch steel plate which was welded to the seismic test machine. Braces consisting of 4-inch square tubing were bolted using 1/2-inch bolts to the top of the cubicle and welded to the test machine to simulate the support of the concrete wall at Diablo Canyon. This is illus-trated on pages 536 and 537 of the report.
Service Mounting The cubicle is mounted adjacent to the concrete wall. It is attached to the wall at the top with a bolted angle clip. The clip can be seen in Photograph
- 1. The bottom of the cabinet base frame is bolted to the floor with four 1-inch bolts as shown in Photograph 2.
Comparison Even though the base frame was skip welded to the test machine, whereas it is bolted to the floor in the field, the mounting was conservative for the following reasons:
- a. The wall support precludes any significant moment loads from being applied to the base, leaving only shear loads.
- b. The same bolting arrangement is used on the top and bottom of the base frame and therefore the bolts at the top of the base frame demonstrated shear loading capability.
- c. The structural connections between the bottom of the base frame and the floor are stronger than those between the top of the base frame and the cubicle and therefore the upper connections demon-strated the required structural capability,
- d. For this mounting arrangement there would be no difference in cubicle internal response between the skip welded connection and a bolted con-nection.
Diesel Generator Control Door and Sub-panel Test Mounting The control door was attached to a 4-inch square tubing fixture using the normal bolt holes in the door hinge (1/4" bolts) on one side and the door closing mecha-nism on the other side. This is illustrated on pages 536, 537, and 538.
9 WYLE LABCRAM aercar no-58255 t-$eunric savicts a sysnas caour wasnanoer Ancus,soacoeActuTV ee,s wo 3 Addendum 1 GROUP 11 (Con tinuad)
A sub panel was fabricated out of 1/8-inch steel plate 68 x 30 inches. The plate was in turn bolted (six 3/8-inch bolts) to a rigid bookend type fixture.
Spacers were used on the bolts to maintain a gap between the test fixture and steel plate. This was to simulate in-service attachment (supported only with mounting bolts).
The test specimens were bolted to the steel plate using the same size bolts that are in normal use. This is Illustrated on pages 541, 542, and 543 Service Mounting The diesel generator control cabinet is braced to the wall at the top with three unistrut bars which can be seen in Photograph 3 The overall cabinet is rigid, i.e., the primary structure has no resonances below 33 Hz.
An interior view showing components mounted on the sub-panel is shown in Photograph 4.
Comparison The mounting of the cabinet door with its normal mounting hardware onto a rigid test fixture properly and conservatively simulated the service mounting of the door to the rigid cabinet structure.
Several components were mounted on a simulated sub panel which was mounted to a rigid test fixture in an identical manner to the mounting in the rigid cabinnt.
The first mode frequency of the service mounted sub panel is 20 Hz as seen in the following record.
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M MM6 REPORT NO f scsime scavicts a,sysius omoup 4
WESTEaN oPfmATiota, NomCo FACluTY PA04 NO Addendum i GROUP lli Ventilation System Relay Sub panel Test Mounting A ventilation system relay sub panel with the normal components mounted on it was attached to a rigid bookend type test fixture using four 3/8-inch bolts with spacers between the fixture and sub panel. This was to simulate in-service attachment (supported only with mounting bolts). This is illustrated on pages 545, 546, and 549 Service Mounting The relay cabinet is rigidly mounted to a concrete wall as illustrated in Photo-graph 5 The sub panel is rigidly mounted inside the cabinet with four bolts as shown in Photograph 6.
Comparison An actual relay sub panel with all of the normal components was rigidly mounted to the test fixture. This is a proper and conservative simulation of service conditions.
Ventilation System Logic Panel .;nd Power Supply Test Mounting The ventilation system logic panel was bolted to a rigid 4-inch square tubing fixture using the actual in-service hinges and bolt holes. The power supply was bolted to two pieces of unistrut that were welded to a rigid bookend type test fixture. These are 111ustrated on pages 551, 553, 555, and 556.
Service Mounting The logic panel is housed in a cabinet which is rigidly mounted to a concrete wall.
This is illustrated in Photograph 7 Comparison The logic system components were mounted to rigid test fixtures using actual mounting hardware. This is a proper and conservative simulation of service con-ditions.
g ggs ,,,ogy no 58255 i SCENTIFIC SERVICES & SYSTEMS group wtsTran orenAnoNS, NoRCo FACIUTY PAGE NO 5 Addendum 1 GRDUP iiI (Continued)
Main Annunciator Panel AC and DC Input Relays Test Mounting The two AC input relays were attached to an 0.6-inch aluminum panel 20 x 20 inches. The aluminum panel was bolted (four 1/4-inch bolts) to a rigid bookend type test fixture. Dummy weights were bolted to the aluming n panel to achieve a first mode frequency of 12 Hz, to simulate the normal frequency of the mounting locations of the relays at Diablo Canyon.
The two DC Input relays were attached to an 0.1-inch aluminum panel 10 x 19 inches.
The aluminum panel was bolted (four No. 10 bolts) to a rigid bookend type test fix-ture. Dummy weights were bolted to the aluminum panel to achieve a first mode fre-quency of 25 Hz, to simulate the normal frequency of the mounting locations of the relays at Diablo Canyon. These are shown on pages 545, 547, 551, and 554.
Service Mounting The main annunciator components are all mounted in a row of cabinets which are all secured together along the top with two structural channels. The channels are in turn braced to the concrete wall as shown in Photograph 8. These braces provide support so that the primary cabinet structure is rigid.
The AC and DC input relays are mounted within the rigid structure on aluminum panels.
The first mode frequencies of the two panels are 13 Hz and 25 Hz as shown below.
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wtsTERN oPtAAfiONS. NoRc0 FACUTY Pace No Addendum 1 GROUP lII (Continued) 1----
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Comparison The relays were mounted on dummy mounting panels which were secured to rigid test fixtures and tuned to the correct first mode frequencies. This is a proper and conservative simulation of service conditions.
Main Annunciator Panel - Other Components Test Mounting All of these components were mounted to rigid test fixtures in an identical manner to that used in the service mounting to the rigid primary cabinet struc-ture. Various of the components can be seen on pages 545, 546, 548, 550, 551, 552, and 554.
Service Mounting All critical components are mounted to a rigid primary cabinet structure. Photo-graph 11 is representative of those which use the rack mounting style.
Comparison All components were mounted for test in a proper and conservative manner.
Main Annunciator Tyoewriter Test Mounting The typewriter, mounted on its shelf and drawer slides, was bolted to four pieces of 1-1/2-inch angle using the standard mounting hardware. The angle was welded to the test machine. The typewriter assembly was supported at the four corners only. The mounting may be seen on page 546.
M6 REPORT NO.
, scnNunc stavlCES & SYSTEMS GROUP J
W1.5 TERN oPf RADONS, NORCo FACIUTY PAGE NO Addendum 1 GROUP lli (Continued)
Service Mounting Photograph 12 Illustrates the mounting of the typewriter. The slides are secured to a rigid framework.
Comparison The typewriter was mounted for test in a proper and conservative manner.
GROUP IV DC Distribution Panel Test Mounting The DC distribution panel was skip welded to a 1-inch steel plate which in turn was welded to the seismic test machine. Braces consisting of 4-inch square tubing were bolted (1/2-inch bolts) to the top of *Se panel and welded to the seismic test machine to simulate the concrete wat) .:t Diablo Canyon.
This is illustrated on pages 567 and 568.
Service Mounting The panel is skip welded to floor steel. Photograph 13 shows the base of the cabinet (the welds are on the inside and not shown). The panel is also sup-ported at the top to the concrete wall as shown in Photograph 14 (the rear cabinet).
The test mounting was a proper and conservative simulation of the service condition.
Battery Charger Test Mounting The battery charger was bolted (1/2-inch bolts) using the actual in-service bolt holes, to a 1-inch steel plate which in turn was welded to the seismic test machine.
This is Illustrated on pages 557 and 559 The test was performed with bracts in-stalled on the top of the main transformer as is shown on page 562.
Service Mounting The cabinets are mounted in various ways. One is welded to the floor on the ends as shown in Photograph 15 Others are welded to the floor in different ways. Some have supports at the top to the concrete wall. Photo,,raph 16 shows the mounting of the main transformer inside the cabinet. No braces are Installed.
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M MMS REPORT NO.
, sorreT:Fic stevicts a sysiums oaour 3 WESTERN OPERATIONS.NoRCo FAOuTY PAGE NO Addendum 1 GROUP IV (Continued)
Comparison The test mounting used bolts into the floor and no top support as being repre-sentative of the worst case mounting and is therefore conservative. Braces on the top of the main transformer must be field Installed to make the service support equivalent to the test configuration.
Turbine Lube Oil Starter Test Mounting The turbine lube oil starter in its normal mounting pan was bolted (1/4-inch bolts) using the actual in-service bolt holes, to a rigid 4-inch square tubing fixture, which in turn was welded to the seismic test machine. This is illus-trated on pages 570 and 571.
Service Mounting The starter is mounted in a cabinet which is welded to the floor and supported at the top to the concrete wall. The primary structure of the cabinet is rigid.
Photograph 17 shows the starter mounted in the cabinet.
Compa ri son The vertical brace behind the mounting pan (shown on page 571) should have been applied only at the upper portion of the pan instead of full icngth. This mounting will be corrected during the retest of the starter.
Fire Pump Controller Cabinet Test Mounting The fire. pump controller cabinet was bolted (1/2-inch bolts), using the actual in-service bolt holes, to a 1-inch steel plate which in turn was welded to the seismic test machine. Braces consisting of 4-inch square tubing were bolted (1/2-inch bolts) to the top of the cabinet and welded to the seismic test machine to simulate the concrete wall at Diablo Canyon. This is 111ustrated on pages 569 and 571.
Service Mounting The controller cabinet is rigidly secured to the floor and the concrete wall as shown in Photograph 18.
Comparison The test mounting is a proper and conservative simulation of the service con-figuration.
M NMS aEPORT NO 58255 t SCENTIFIC 5ERVIC15 & $YsTIM5 GtoVP WESTIAN OPERATION $w NoRCo FACluTY Pact % 9 -
Addendum 1 GROUP IV (Continued)
Local Starter Test Mounting The local starter was bolted (1/2-inch bolts), using the actual in-service bolt holes, to a rigid bookend type test fixture, which in turn was welded to the seismic test machine. Page 558 is representative of the test mounting for all local starters.
Service Mounting All local starters are rigidly mounted to concrete walls. A representative mounting is shown in Photograph 19 Compa ri son The test mounting is a proper and conservative mounting for all the local starters.
Battery Cells Test Mounting The two battery cells were mounted in a rigid test fixture in the same manner as in-service. The test fixture was designed to simulate a portion of the actual in-service battery rack as closely as possible. The test fixture was built of 1-1/2-inch angle and unistrut. The test fixture was welded to the seismic test machine. This is shown on pages 577 and 578.
Service Mounting The batteries are mounted in a rack as shown in Photograph 20.
Comparison The test mounting is a proper and conservative simulation of the in-service condition.
GROUP V Fisher Controller Test Mounting The Fisher controller was bolted (1/4-inch bolts) to a 1/4-inch steel plate which was welded to a piece of 8-inch square tubing welded to the seismic test
M MMS REPORT NO SCENTIFIC SERVIC!s & SYSTEMS GROUP 10 WESTERN oPitAT1oNS, NotCo FACluTY PAGE NO Addendum 1 GROUP V (Continued) machine on a 30-degree angle to simulate normal in-service mounting in the control board. This is shown on page 586.
Service Mounting The controllers are mounted to the sloping panel of the hot shutdown panel.
The panels are all rigid. Photograph 21 shows the inside of the mounting panels and the egg crate design which contributes to the high rigidity of the panel.
Comparison The test mounting is a proper and conservative simulation of
- irvice condi-tions.
Vital Load Center Test rounting A single cell cabinet, containing, at different times, two 100 amp breakers, Size 2, 3, 4, and 5 starters, was bolted (1/2-inch bolts) to a 1-inch steel plate which was welded to the seismic test machine. Braces consisting of 4-inch tubing were bolted (3/8-inch bolts) to each side at the top of the cabinet and welded to the seismic test machine. These braces were installed to simulate another cell on each side of the single cell and the top support to the concrete wall. This is Illustrated on pages 587 and 588.
Service Mounting The load center consists of a row of cells which are skip welded to the floor.
A structural channel is secured to the top of the row of cells and is in turn braced to the concrete wall. This is shown in Photographs 22 and 23 The primary structure of the row of cells is rigid.
Comparison The test mounting is a proper and conservative simulation of In-service condi-tions.
Vital Load Center Fan Cooler Starters The vital load center fan cooler starters from Units I and 2 were bolted using the actual in-service bolt holes to support structure which was fabricated to duplicate the service mounting in the cells. The support structure was supported on rigid test fixtures. These can be seen on pages 581, 587, and 588.
58255 WYLE LABORATURIES apont no sotsunc stevicts a systus caour ij wutuN oPtRADoNs, NotCo 7ACUTY MM W Addendum 1 GROUP V (Continuec)
ServiceModnting The detail mounting structure within the rigid cells for the fan cooler starters are different for units 1 and 2.
. Comparison The detail mounting structure for each starter was dupilcated for the test mounting. The test mounting is a proper and conservative simulation of the service configuration.
Vital Load Center Auxiliary Relay Cabinets Test Mounting The two auxiliary s elay cabinets were bolted (1/2-inch bolts) us!.;g ;.Ne actual in-service bolt holer, to rigid bookend type test fixtures. The 2G cabinet was set flat on the seismic test machine and the 2H cabinet was not supported on the bottom. This is illustrated on pages 592 and 593 Service Mounting The service mounting was not rI Jid but is being revised to provide a rigid mounting for these cabinets.
Comparisen The test mounting is a proper and conservative simulation of the mounting which will be used in service.
Report No. 58255 Page No. 12 ADDENDUM I
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