ML17209A634
| ML17209A634 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 02/10/1981 |
| From: | Robert E. Uhrig FLORIDA POWER & LIGHT CO. |
| To: | Eisenhut D Office of Nuclear Reactor Regulation |
| References | |
| L-81-44, NUDOCS 8102170311 | |
| Download: ML17209A634 (26) | |
Text
REGULATURYQNFORMATION DISTR ISUTION SYSTEM (BIDS)"
ACCESSION NSR:8102170311 DOC,DATE: 81/02/10 ROTARIES:
NO FACIL:50"3)5 St. Lucie Planti Unit 1E Florida Power 8 Light Co.
AUTH,NAME AUTHOR AFFILIATION UHRIGER E ~
Florida Pointer 8 Light Co ~
RECIPNNAME RECIPIENT AFFILIATION EISEHHUTED<<G.
Division of Licensing
SUBJECT:
Forwards response to NRC 801216 1 tr requesting addi info re adequacy of station electric distribution voltages. Each startup transformer ensures automatic start 8 continuous operation of all Class IE equipment of respective train.
DISTRIBUTION CODE:
A015S COPIES RECEIVED:LTR ENCL SIZE:js TITLE: Onsite Emergency Power Systems NOTES'OCKET 05000335 RECIPIENT IO CODE/NAME ACTION:
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TOTAL NUMBER OF COPIES REQUIRED ~
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~~lt1 CO lxl C~1 LLI CK FLORIDA POWER 4 LIGHTCOMPANY February 10, 1981 L-81-44 Office of Nuclear Reactor Regulation Attention:
Mr. Darrell G. Eisenhut, Director Division of Licensing U.
S. Nuclear Regulatory Commission Washington, D.C.
20555
Dear Mr. Eisenhut:
Re:
St. Lucie Unit 1
Docket No. 50-335 ADE UACY OF STATION VOLTAGES Florida Power 6 Light's response to an NRC letter dated December 16,
- 1980, requesting additional information on the adequacy of station electric distribution voltages is attached.
ber E. Uhrig Vice President Advanced Systems 6 Technology REU/PLP/mbd cc:
J.
P. O'Reilly, Region II Harold F. Reis, Esquire poiS 5
sh t
stood vogII PEOPLE... SERVING PEOPLE
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ATTACHMENT Re: St. Lucie Unit 1
Docket No. 50-335 ADE UACY OF STATION VOLTAGES k
REQUEST FOR ADDITIONAL INFORMATION ST.
LUCIE lJ'1 ADEQUACY OF STATION ELECTRIC DISTRIBUTION SYSTEM VOLTAGES Reference 1:
Florida Power
& Light Company's letter (L-80-304) to NRC (D.G. Eisenhut) dated September 12, 1980.
RESPONSE
TO UESTION 1:
Table A of this Response demonstrates that each of the'tartup transformers (1A oi 1B) has the capacity to ensure the automatic st'art and continuous operation of all the Class 1E equipment of its respective train.
The two St.
Lucie 1 startup transformers have no electrical intertie connections between them.
Each startup transformer feeds its own train of auxiliary loads.
If, for example, startup transformer lA is removed from service, its respective diesel generator (A) will load on that train (A) of Class lE equipment and continue to maintain operation.
Since train B is being fed independently by startup transformer 1B, it will be unaffected by'he loss of startup transformer 1A.
Thus, train B will still be maintained operational by startup transformer 1B.
Parallel operation of Unit 1 and Unit 2 4.16 KV power can be achieved under administrative control by manually switching the startup transformers when Unit 2 becomes operational.
Should it be considered desirable at some future date to align the Unit 2 startup transformers to provide 4.16 KV power to both operating units, appropriate operating procedures and administrative controls will be developed.
These procedures and controls as stated in the FSAR, will assure that the startup transformer is not over-loaded should an accident condition occur.
RESPONSE
TO QUESTIONS 2 AND 3:
Table A provides the load terminal voltages for the cases previously analyzed (Reference 1.).
RESPONSE
TO QUESTION 4:
Table B contains the test data compiled at the St. Lucie Plant.
The data was obtained using standard plant test methodology.
This included the use of a voltmeter to measure the secondary voltages of the potential transform'ers for the 4.16 KV SWGR and 480 V. load centers.
The bus amperes and the 480V MCC voltages were read from the cabinet's panel board meters.
These readings were then averaged and their respective transformer ratios were used to calculate the actual voltage and current on the bus.
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RESPONSE
TO UESTION 5:
Backfeeding through the main transformer bank to the class 1E buses will only be done in a reactor shutdown mode.
RESPONSE
TO UESTION 6:
If the conditions set forth in Question 6 are assumed, the second level of undervoltage protection will be actuated.
It is highly unlikely that this occurrence will be experienced due to the sequence of events which must occur.
For example, a low bus voltage condition resulting-from switchyard voltage has to pre-exist.
A simultaneous accident signal has to occur and all Class 1E loads have to be running.
The largest non-Class 1E loads are the condensate pumps which would be operating.
An operator would have to manually stop one. of the pumps.
This action would only be taken after an analysis of the plant's conditions were made.
The operator would then have to manually restart the pump which would again require the plant's conditions to be analyzed prior to the action being taken.
There exists no intertie between the A and B undervoltage tripping logics.
Should a relay actuation occur on one bus, only that bus would be loaded on its respective emergency diesel generator.
The other bus will still be connected to its offsite source.
The relays are set to, protect the safety-related equipment. If the voltage on a bus becomes low enough for whatever
- reason, the equipment's operability will be protected by the actuation of the undervoltage relay.
Therefore, the consequences of the set of conditions stated in Question 6 although unlikely, are not considered to have any adverse effect on the plant's capability to achieve and maintain safe shutdown.
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1 of 14 TABLE A BUS VOLTAGES BUS BUS CASE 1 CASE 2
CASE 3" 4.16 KV SWGR 1A-3 AND 1B-3 480V SWGR lA-2 AND 1B-2:
458.15 449.88 450.08 449.03 423.31 408.42 407.31 407.76 4007.03 3768.25 4259. 86 488.10 479.83 480.03 478.98 CASE 1:
CASE 2:
CASE 3:
Normal running loads being supplied by the start up transformer (unit trip from full load with transfer of the loads to the start up transformer).
I Same as Case 1 with a concurrent accident condition.
Same as Case.lat maximum grid voltage.
2 of 14 LOAD TERMINAL VOLTAGES
- 4. 16 kV 'SlgGR~1A-3 SA)
CASE 1 CASE 2" CASE 3
H. P.
SAF INJ lA:
L. P.
SAP INJ 1A:
CONT SPRAY PUMP 1A:
COMP COOL PUMP lA:
INTAKE COOL PAP 1A:
AUX. P.
M. FOP lA:
4004.08 4005. 03 4003.79 3994.03
..3982.93 4000.83 3753.86 3759.18 3752.54 3755.52 3744.42 3740.61 4256. 91 4257.86 4256. 62 4246.86 4235.76 4253.66
3oE14 LOAD TERMINAL VOLTAGES 4, 16 kV SWGR 1B-3 (SA)
COMP COOL PUMP 1B:
H. P.
SAF INJ 1B:
L. P.
SAF INJ 1B:
CONT.
SPRAY PUMP 1B:
INTAKE COOL PUMP 1B:
AUX. F.
W.
PUMP 1B:
CASE 1 3995. 41 4002.52 4003.09 4002.20 3982 '6 4002.49 CASE 2
3756.90 3746.10 3750.06 3744.70 3743.95 3742.03 CASE 3
4248.24 4255.35 4255.92 4255.03 4235.29 4255.32
t
4 of 14 LOAD TERMZNAL VOLTAGES CASE 1 CASE 2
CASE 3 CONT FAN COOLER HVS-lA
'ONT FAN COOLER HVS-1B CHARGE PUMP 1A:
448.69 447.47 438.04 413.85 412.:63 403.20 478.64 477.42 467.99
5 of 14 LOAD TERtlINAL VOLTAGES 480V SWGR 1B-2 SA CASE 1 CASE 2
CASE 3
CONT FAN COOLER HVS-1C CONT FAN COOLER HVS-1D CHARGE PElP 1B:
443.85 441.13 440.89 409. 01 406.29 406.05 473.80 471.08 470.84
6 of 14 LOAD TERMINAL VOLTAGES 480V MCC 1A-5(SA)
CASE 1 CASE 2
CASE 3 BATTERY CHARGER 1A:
H2 RECOMB 1A:
AUX. BLDG.
SUPPLY FAN HVS-4A:
REAC.
PURGE FAN HVE-8A AUX BLDG.
SWGR SUPPLY FAN HVS-5A REAC.BLDG.
SUP.
COOL. UNIT HVE-3A:
CHEM & VOL CNTL SYS H. T. TF A:
MAINT BY-PASS TF 1A:
BORIC ACID MAKE-UP TK HTR. A:
F:
W.
PUMP lA DISCH. VLV. MV-09-1:,
REACaCOOL OIL LIFT PIP P-1Al-A:
REAC.BLDG. CAVITY SUP.
FAN HVS-2A:
REAC.COOL OIL LIFT PtRP P-1B1-B:
F.
W. Pic 1B DISCH.
VLV MV-09-2:
REAC. CAVITY SEIIP PUMP lA:
AUX HPSI FLOW CONTROL VLV HCV-3647:
AUX HPSI FLOW CONTROL VLV HCV-3617:
ELECT. EQUIP.
RM RF VENT RV-3:
KITCHEN EXH FAN ISO VLV FCV-25-24:
445.75 426.75 441.70 439.86 448.63 449.95 447.12 446.83 443.60 436.00
. 443.61 441.17 445.46 434.15 441.71 448.51 448.67 449.26 447.52 443.31 449.09 404.29 387.27 400.24 398.40 407.17 403.49 405.66 405.37 402.14 377.17 402.15 399 '1 404.00 384.00 400.25 406.84 407.03 405.71 406.39 402.97 407.88 475.70 456.70 471.65 469 F 81 478.58 474.90 477.07 476.78 473.55 465.95 473.56 471.12 475.41 464.10 471.66 478.46 478.62 479.21 477.47 473.26 479.04
7 of 14 LOAD TERMINAL VOLTAGES 480V MCC 1A-5(SA) continued CASE 1 CASE 2
CASE 3
CONTROL RM S ISO VLV FCV-25-17:
AUX. F.
W.
PUMP lA DISCH VLV MV-09-9:
AUX. F.
W.
PUMP lA DISCH VLV MV-09-13:
MAIN STEAM ISO BY-PASS MV-08-1A:
SHUTDOWN COOLING ISO VLV V-3481:
HIGH PRESS SUCTION C/0 VLV V-3633:
CONTROL RM.
N.
SH'IELD BLDG.
VENT VLV FCV-25-11:
. hfAKE-UP BY-PASS TO CHG PUMPS V-25-14:
SAF. INJ.
TK 1B2 DIS VLV V-3644:
LPSI FL'OW CONTROL VLV HCV-3615:
AIR RECIRC COOL IN HDRA VLV MV-14-6:
AIR RECIRC COOL IN HDRA VLV MV-14-0:
449.31 448.95 447.39 447.45 443.59 449.45 449.41 448.69 448.38 449.27
,447,.44 447.74 448.95 448.95 407.98 407. 64 405. 20 406.28 403.79 408.05 408 F 10 407.61 407.38 407.72 405.58 406.56 407.71 407.57 479.26 478.90 477.34 477.40 473.54 479.40 479.36 478.64 478.33 479.22 477.39 477.69 478.90 478.90
8 of 14 LOAD TERMINAL VOLTAGES 480V MCC 1B-5 (SA)
CASE 1 CASE 2
CASE 3 REA' PURGE FAN HVE-8B:
AUX. BLDG SUPPLY FAN HVS-4B:
BATTERY CHARGER 1B:
AUX. BLDG.
REAC BLDG SUP COOL UNIT HVE-3B:
CHEM
& VOL CNTL H T TRF 1B:
REAC BLDG.
CAV SUP FAN HVS 2B:
BORIC ACID KKE-UP TK 1A HTK B:
REAC CAVITY SUMP PUMP 1B:
MAINBY-PASS TRANSF 1B:
BORON LOAD CONTROL VLV V-2525:
MN STEAM 1S BY-PASS VLV MV-08-1B:
HIGH PRES.
SUCT. C/0 VLV V-3662:
TOILET EXH FAN.ISO VLV FCV-25-19:
BORIC ACID GRAV. FD.
VLV V-2508:
VOL.
CONT.
TK OUT TO CHG.
PMPS V-2501:
AIR RECIRC COOL IN HDR.
B VLV MV-14-5:
AIR RECIRC COOL OUT HDR.
B VLV MV-14-7:
SAF INJ TK lA-2 DISCH VLV V-3614:
438. 59 440.60 445.09 448.43 444.19 448.07 440.51 446.33 442.06 446.83 448.53 447.47 449.34 442.35 449.17 448.51 449.43 448.97 449.50 443.22 397.13 399.14 403.63 406.97 402.73 406.61 399.05 404.87 400.60 405.67 405.97 406.61 408.03 402.88 407.37 406.96 407.92 407.73 407.93 401.31 468.54 470.55 475.04 478.38 474.14 478.02 470.46 476.28 472.01 476.78 478.48 477.42 479.29 472 '0 479.12 478.46 479.38 478.92 479.45 473.17
9 of 14 LOAD TERMINAL VOLTAGES 480V MCC 1B-5(SA) continued CASE 1 CASE 2
CASE 3
BORIC ACID GRAV FD. VLV. V-2509:
SHIELD BLDG VENT VLV FCV-25-12:
AUX F.
446.88 448.45 447.97 447.94 448.83 448.89 HPSI PUMP DISCH VLV V-3654:
KITCHEN EXH FAN 'ISO VLV FCV-25-25:
CONTROL ROOM N. OAI. ISO VLV FCV-25-14:
447.68 449.40 449.51 AUX F.
W.
PUMP 1B DISCH. TIE VLV MV-09-14:
447.18 405.59 407.02
~ 406.71 406.20 407.76 407.52 405 '3 406.59 408.13 407.99 476.83 478.40 477.92 477.89 478.78 478.84 477.13 477.63 479.35 479.46
'10 of 14 LOAD TERMINAL VOLTAGES 480V MCC lA-6(SA)
CASE 1 CASE 2
CASE 3
SHIELD BLDG EXH FAN HVE-6A:
OUTDOOR:
HVA-3A, ACC-3A:
BORIC ACID MAKE-UP PUMP 1B:
BORIC ACID MAKE-UP PUMP 1A:
HVE-6A (EMC-HVE-6A1<TR'):
BORIC ACID MAKE-UP TK lB HTRA:
INTAKE COOL WTR NON-EM ISO VLV MV-21-3:
POST ACC.
HYD.
PURGE FAN HVE-?A:
ELEC.
EQUIP.
SAF INJ.
TK 1A1 DISCH VLV V-3624:
AUX HPSI FLOW CONT VLV HCV-3637:
CONT RM A/C INDOOR HVA-3A:
AUX HPSI FLOW CONT VLV HCV-3627:
TOILET EXH FAN ISO VLV FCV-25-18:
CONTR RM BOOSTER FAN HVE-13A:
- REACT SUMP PUMP VLV MV-07-2A:
REFUEL WTR TK VLV i'fV-07-lA:
HVE-6B (EHC-HVE 6A2 HTR):
441.15 444.39 446.61 447.32 447.37 444.46 447.62 445.40 446.27 446. 61 444.29 447.30 448.40 447.56 448.86 448.91 448.95 449.22 447.49 448.67 447.52 398.38 401.84 403.84 404.55 404.60 401.69 404.85 403.92 403.50 403.84 400.78 404.90 405.49 404.79 406 F 01 406.52 406.18 406.27 404.9$
406. 00 404.75 471.10 474.36 476.56 477.27 477.32 474.41 477.57 475.35 476.22
. 476.56 4?3.50 477.25 478.35 477.51 478.81 478.86 478.90 479.17 477.44 478 '2 47?.47
11'of 14 LOAD TERMINAL VOLTAGES 480V MCC 1-B6 (SB)
CASE 1 CASE 2
CASE 3
SHIELD BLDG EXH FAN HVE-6B:
BORIC ACID BATCHING TK HTR:
H RECOMBINER 1B:'UTDOOR:
HVA-3B, ACC-3B'.
W. PEP lA/1B DISCH TO S/G 1A MV-09-7:
F.
W.
PUMP 1A/1B DISCH TO S/G 1B MV-09-8:
AUX BLDG.
EM.
EXH.
FAN HVE-9B:
HVE-6B (EMC-HVE-6B1 HTR):
BORIC ACID KKE-UP TK 1B HTR B:
INTAKE COOL WTR NON-EM XS~
VLV 'MV-21-2:
POST,;ACC.
HYD.
PURGE FAN HVE-7B:
SHUTDOWN COOLING ISO VLV V-3652:
PRIM.
WTR.
SAF. IN~.
TK 1Bl DISCH VLV-3634:
LPSI FLOW CONT.
VLV HCV-3625:
ELECT.
EQUIP.
RM.
EXH FAN HVE-12:
ELECT.
EQUIP.
RM.
ROOF VENT RV-4:
CONST.
RM. A/C INDOOR UNIT HVA-3B:
HPSI FLOW CONT. VLV. HCV-3636:
HPSI FLOW CONT.
VLV HCV-3626:
CONT.
RM.
BOOSTER FAN HVE-13B:
442.93 448.43 441.41 443.91 445.52 445.52 446.35 445.71 447.56 445.34 446.53 442.94 449.32 443.74 446.30 440.94 448.98 445.74 447.89 447.79 448.33 400.16 405.66 398.64 401.14 396.03 396.03 403.58 402. 94 404.79 403.88 403. 76 402.06 406.76 400.17 403.64 398.17 400.95 402.97 404.94 404.55 405.56 472.88 478.38 471.36 473.86 475.47 475.47 476.30 475.66 477.51 475.29 476.48 472.89 479.27 473.69 476.25 470.89 478.93 475.69 477 '4 477.74 478.28
12 of 14 LOAD TERMINAL VOLTAGES 480V MCC 1-B6
( SB) continued CASE 1 CASE 2
CASE 3 CONT.
RM. S. "OAI 'ISO VLV FCV-25-15:
REFUEL WTR TK. VLV. MV-07-1B:
MIN FLOW ISO VLV V-3660 R. C.:
HVE-6A (EHC-HVE-6B2 HTR):
449. 65 446. 94 448.42 449 '3 448.10 407.02
,404.47 405.31 406,:58 405.33 479.60 476.89 478.37 479.28 478.05
13 of 14 LOAD TERMINAL VOLTAGES 480V MCC 1A-7 (Pi)
CASE 1 CASE 2
CASE 3
OIL CIRC PEP FOR 12 CYL ENGINE:
OIL CIRC PILAF FOR 16 CYL ENGINE:
AIR COMPR.
MOTOR:
FUEL TRANS. PEP 1A:
DIESEL GEN.
1A FAN RV-5:
448.73 448.73 447.40 445.87 448.52 407.46 407.46 406.13 404.60 407.25 478. 68 478. 68 477.35 475.82 478 '7
14 of 14 LOAD TERMINAL VOLTAGES 480V MCC 1B-7(.SK)
CASE 1 CASE 2
CASE 3 OIL CIRC PUMP FOR 12 CYL ENGINE:
OIL CIRC PUMP FOR 16 CYL ENGINE:
AIR COMPR.
MOTOR:
FUEL TRANS.
PUMP 1B:
DIESEL GEN 1B FAN RV-6:
448.73 448.73 447.40 445.87 448.52 407.46 407.46 406.13 404.60 407.25 478.68 478.68 477.35 475,82 478 '7
TABLE B SWITCHGEAR/MCC VOLTAGE/LOAD READINGS Plant Status:
Generator Load 840 MW gross Volts 22.3 KV SWITCHGEAR BUS VOLTS BUS ALPS 4.16 KV.
SWGR.
lA3 4.16 KV.
SWGR.
1B3 4245.5 4245.5 260 277 480 V.
SWGR.
1A2 484 '
900 480 V.
SWGR.
1B2 484. 3 1,100
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MOTOR CONTROL CENTER 480V MCC 1A5
'480V MCC 1B5 480V MCC lA6 480V MCC 1B6 480V MCC 1A7 480V MCC 1B7 VOLTAGE AVERAGE 475 475
~ 2 475. 3 474. 7 476 474 CURRENT ALPS 245 250 50 185 90>>
50
>>Note:
MCC1A7 assumed connect to MCC 1AB FLORIDA POWER
& LIGHT COMPANY POWER PLANT ENGINEERING DEPARTMENT Page 1 of 1