ML20066H509
| ML20066H509 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 07/08/1982 |
| From: | GILBERT/COMMONWEALTH, INC. (FORMERLY GILBERT ASSOCIAT |
| To: | |
| Shared Package | |
| ML20066H504 | List: |
| References | |
| NUDOCS 8211230288 | |
| Download: ML20066H509 (44) | |
Text
.
Attachment 3 Engineered Safeguards Busses Voltage Calculations l
l 8211230288 P211i9 PDR P
ADOCK 05000302 PDR 1
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Q= n % %. m MICROFILMED d d d b 40 PAGES CAlt,ULATION o,,,,,,,,o g g g onvE 7/s/82 '
l Purpose To compare Engineered Safeguards Bus Voltages with those measured by Florida Power Corporation.
Sources of Information: These are identifed at the appropriate part of the calculations.
Computer Calculation: Not applicable ,
/
Assumptions: These are identified at the appropriate part of the calculations. '
l l
Indetification of End Results: The comparison of calculated and measured voltages is shown in the Table at the end of the calculations.
The actual one line diagram used (except for impedance values) is given on page 37 of Calculations 11/20/79 in " Adequacy of Station Electric Distribution Voltages -
Crystal River 3".
4.16 KV LOADS Rated KVA taken from " Crystal River Unit 3 - Auxiliary Lording pages 3 and 4.
f Number of motors running taken from thcae in " Adequacy of Station Electric Distribution voltages" pages 4, 5 of Calculations 10/21/80. KVA calculated from latest current information shown on the motor data sheets.
Power factors were also taken from cotor data sheets; the power factor of the Auxiliary Building Exhaust Fans, since they were running at just over 50% load was estimated from the full load power factor.
As the impedance of an induction motor will vary as the voltage applied to the terminals, the terminal voltage was estimated at .99 of 4.16 KV (base voltage) from preliminary calcuations.
s surJecT ENGINEERED SAFEGUARDS
5'" **GE 3
Gilbert Associates,Inc. BUSES VOLTAGE CALCULATIONS 04-5011-113 V= . %,
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The impedance of an induction motor when running is given by Zb ase " Zrated x (Actual Terminal Voltage)2 Base Voltage In calculating the impedance from rated KVA, in terms of the base MVA, motor KVA has Base Voltage been multiplied by (Actual Terminal Voltage )2, since impendance the inverse of the is g portioned to Motor impedance is then Base MVA t
l Motor MVA Base MVA has been taken throughout as 100.
Converted to KVA Motor 4.16KV Base Unit Cus 3A Rated Running pf KW KVAR Volts MW MVAR MVA
- 1. CV Pump 3A 1700 1700 .822 1397 968 .99
- 2. CW Pump 3C 1700 1700 .822 1397 968 .99
- 3. Sec. Service closed 317 317 .875 277 153 .99 Cycle Pp. 3A
- 4. Feedwater Boster 2110 2110 .91 1920 875 .99 Pp.
- 5. Condensate Pp. 3A 1710 1750 .9 1575 763 .99
- 6. Normal Nuc. Serv. 328 328 .843 277 176 .99 Sea Water Pp. 3
- 7. Aux. Bldg. Exh. 180 100 .85 85 53 .99
- 8. 6928 3956 7.069 4.036 8.14 Unit Bus 3B
- 9. CW Pump 3B 1700 1700 .822 1397 968 .99
- 10. CW Pump 3D 1700 1700 .822 1397 968 .99
- 11. Sec Service 317 317 .875 277 153 .99 Closed Cycle Pp. 3B
t su: Ject ENGINEERED SAFEGUARDS 5' **GE 04-5011-113 4 BUSES VOLTAGE CALCULATIONS
[) Gilbert Associates,Inc. d d d d n%-
"'**I 40 c meCROFILMED PAGES CALCULATION o ,, ,,,o g g g DArc 7/8/82 Converted to KVA Motor 4.16KV Base Unit Bus 3B Rated Running pf KW KVAR Volts MW MVAR MVA
- 12. Feedwater Booster 2110 2100 .91 1920 875 .99
- 13. Condensate Pp. 3B 1750 1750 .9 1575 763 .99
- 14. Norm. Nuc. Serv. 227 227 .843 277 176 .99 CCC Pp. 3
- 15. Aux. Bldg. Exh. 180 100 .85 85 53 .99
- 16. Fan 3B 6851 3888 6.99 3.967 8.0372 z 6 R + jX 1
l Unit Bus 3A 12.285 29.720 10.669 + j 6.0904 Unit Bus 3B 12.442 29.580 10.82 + j 6.142 Converted to KVA Motor 4.16KV Base ES Bus 3A Rated Running pf KW KVAR Volts MW MVAR MVA 1
Make UP Pump 3A 588 588 .926 545 222 .99 Reactor Bldg. Spray 215 215 .925 199 82 .99 Pump 3A Decay Heat Pump 339 339 .921 312 132 .99 Emerg. N. S. Sea Water 643 643 .87 559 317 .99 Pump 3A Emerg. N. S. CCC Pump 620 620 .89 552 283 .99 3A Decay Heat Serv. Sea 285 285 .827 236 160 .99 Water Pp.
2403 1196 2.452 1.22 2.7387
ENGINEERED SAFEGUARDS "" '
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- Gilbert Associates,Inc. BUSES VOLTAGE CALCULATIONS 04-5011-113
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pacts CALCULATION o ,c,,,,,, g g, g care 7/8/82 Z $ R+jX ES Bus 3A 36.513 26.45 32.691 + j 16.264 ES Bus 3B 36.513 26.45 32.691 + j 16.264 6.9 KV LOADS =
- Only the Reactor Coolant Pumps.
Volts = 6.6 KV FLc = 685 amp. 1250 rap. synchronous l
l KVA Input = / 3 x 6.6 x 685 = 7830 -
hp = 9000 kW Output = 9000 x .746 = 6714 pf x efficiency = = .8575 Efficiency must be less than unity, so that pf must be greater than .8575.
( Examine 4 KV Motors j hp rpm efficency pf 2000 1200 .946 . 9 1750 257 .934 .822 low speed, not fair comparison 400 1800 .938 .921 800 1800 .936 . 89 '
2500 1800 .948 . 91 l 700 1800 .951 .926 i
700 900 .933 . 87 700 1200 .933 . 89 l
[
.8575 Lowestefficiency=.933Ifweusethis,pfwoulg3ge- = .919 Highest pf in above table = .926, but his is at 1800 rpm.
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.. ', ENGINEERED SAFEGUARDS
. Gilbert Associates,Inc. BUSES VOLTAGE CALCULATIONS 04-5011-113 N
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"'N asse mo FiLesE D b b b PAGE5 40 CALCULATION o,,om,,,,4 oave 7/8/82 Suggest use .9 pf for reactor coolant pump motor.
Running Load = 4 x 7020 KVA = 28.08 MVA at 6.6KV.
Impedance at rated volts on 100 MVA base = 2 08 = 3.56125 pu.
Preliminary calculations showed that volts at motor terminals was approximately 1.033 pu of base voltage, 6.9 KV Impedance at 6.9 KV = 3.56125 x 1.0332 = 3.8007cj25.84
= 3.42021 + j 1.65634
~
480 V LOADS Loads directly connected to the 480 V Switchgear Buses are taken from " Adequacy of j Station Electric Distribution Voltages" - Calculations 10/21/80 pp. 5 thru 7. Pf l
taken from motor data sheets. Motor KVA Loads are based on 460 volts. See " Crystal I
River 3 - Auxiliary Loading."
l Loads on Motor Control Centers are taken from " Adequacy of Station Electric Distribution Voltage" - Calculations 11/20/79. For the ES Buses the case is Load at j End of Block Loading Sequence Including Manually Applied Loads. The loads have been calculated on 480 volts so the motor loads must first be expressed in terms of the 460 volt rating - See " Crystal River 3 - Auxiliary Loading". From examination of motor data sheets it was apparent that an average pf of 0.85 would be a suitable value.
Non motor loads were expressed at 480 volts, so as these are constant impedance loads there is no need to convert to a rated 460 volts.
In order to simulate cable impedances to loads, the load impedances were increased by 2%.
Motor Terminal voltages on the Unit Buses were estimated to be 94% of base voltage and 93% of base voltage on ES Buses. These figures were obtained from preliminary calculations.
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{ . Gilbert Associates,Inc. BUSES VOLTAGE CALCULATIONS 04-5011-113 n rituto paGes CALCULATION o.,o,,,7 o, 4 g onTe 7/8/82 480 V LOADS CONNECTED DIRECTLY TO SWITCHCEAR BUSES KVA 460. V Running KVA 480 V Connected Running pf KW KVAR Condr. Vac. Pump 3A 137 137 . 92 126 54 Station Service Air 91 50 .905 45 21 Compressor 3A = '
I 1
React Bldg. Ind. Cooler 73 50 .835 42 28 Pump 3A Cond. Injection Pump 3A 134 50 .915 46 20 259 123 Resistive 315 480V React Aux Bus 3A Inst. Air Compressor 3A 50 .905 45 21 Resistive 345 480V Intake Bus 3A Screen Wash Pump 70 . 85 60 37 480V Heating Bus 3 Heaters 827 480V Turbine Bus 3B Motors - As Bus 3A 259 123 Heaters 195 480V Reactor Aux. Bus 3B Motors - As Bus 3A 50 .905 45 21 Heaters M
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ENGINEERED SAFEGUARDS h O
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Gilbert Associates,Inc. BUSES VOLTAGE CALCULATIONS 04-5011-113 ,,
D "EV-l wicnorituto d d d d **GES 40 CALCULATION o,,,,,,o,g g g oATE 7/8/82 KVA 460. V Running KVA 480 V Connected Running pf G KVAR 480V Intake Bus 3B Screen Wash Pump 3B 70 . 85 60 37 Screen Wash Pump 3C 70 . 85 60 37 120 74 480V ES Bus 3A Decay Heat CCC Pump 3A 96 . 86 83 49
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Cont. Comp. Wat. 213 . 9 192 93 Chiller 3A 275 142 480V ES Bus 3B As Bus 3A 275 142 480V Plant Aux. Bus 3 l Resistive 733 l
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4.16KV UNIT BUS 3A 480V LOAD IMPEDANCES Q s (3
Eb E, F e Converted to >
-4 g KVA KW KVAR Motor 480V Base 5 --
Z h
480V 460V Volts KW KVAR MVA Z W 1.02Z R+ _i x p o
1 Henting Transformer g g3 g Resistive 827 .827 120.92 0 123.34 123.34+j0 N l> 5 I-2 en n 5
Michine Shop MCC o E a a
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Motors 102.3 83.4 51.75 .94 94.39 58.57 h E *m Heaters 177 177 58.57 Rt o>
8S sz 359.11+j77.5 "
271.39 58.57 .27764 360.18 12.18 367.38 hN Turbine Aux xfr. 3A "E
ne Turbine Bus 3A {
Motors 259 123 .94 293 139 [M sO Heaters 315 315 5%
z6 159.43+j36.45 ""
608 139 .62369 160.34 12.88 163.54 b
Turbine MCC 3A y i O l Motors 288 235 146 .94 266 165 g
\
l Heaters 219 219 J, O
485 165 .5123 195.2 18.79 199.1 188.49+j64.13 C 1
U Water Treat MCC 3A Motors 205.4 167 104 .94 189 118 , ,
lleaters 50 50 h ee O h
239 118 .26654 375.17 26.28 382.68 343.13+jl69.43 $'.
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4.16KV UNIT BUS 3A 480V LOAD IMPEDANCES (Cont'd) p ,
b C
)' D Converted to '
G
-4 KVA KW KVAR Motor 480V Base 5 E
g-g 480V 460V Volts KW KVAR MVA Z d 1.02Z R+jx 3 Vent MCC 3A o o a > .
" m c Motors 284 231 143 .94 261 162 %
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Heaters 125 12.5 g ?
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d 273.5 162 .31788 314.59 30.64 320.88 276.08+jl63.53 o m y 4 m s d [ jE sc sG Racetor Aux. xfr 3A N gM i
P( MN Rector Bus 3A nE Motors 45 21 .94 51 24 Heaters 345 345 gg ac 396 24 .39673 252.06 3.47 257.1 256.63+]15.56 g i dw j
Rasctor MCC 3Al {
j Motors 52.2 43 26 .94 49 29 g 6
l Hesters 124.3 124.3 ,
o.
s
- 173.3 29 .17571 569.12 9.5 500.5 493.64+j82.61 4 k $, .
1 Preos. Heater MCC 3A 726 726 .726 137.74 0 140.5 140.5+jo =
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4.16KV UNIT BUS 3A 480V LOAD IMPEDANCES (Cont'd) n '
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nb e
a Converted to (,
- KVA KW KVAR Motor 480V Base , h .
480V 460V Volts KW KVAR MVA Z W l.02Z R+;y k b
Rcactor MCC 3A2 g ., ,.
Motors 92.6 75 47 .94 85 53 4 _ :: ;. , .
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Heaters 114.4 114.4 ? ~$
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199.4 53 .20632 484.68 14.8f - ,94.37 477.79+jl26.95 E U U
e ,E s<e E Intake xfr. 3A l3 h $$
am Intake Bus 3A *g Motors 60 37.. 94 68 42 .07992 1251.17 31.7 1276.2 1085.81+j670.61 h Heaters E am gm i
Intake MCC 3A d O
Motors 54.2 44 28 .94 50 32 5m Heaters 60 60 l10 32 .I1456 872.9 16.22 890.36 854.92+j248.7
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4.16KV UNIT BUS 38 480V LOAD IMPEDANCES r1 E <>
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Converted to {<
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KVA KW KVAR Motor 480V Base 5 -
480V 460V Volts KW KVAR MVA Z d 1.02Z R+3x 3 t Turbine Aux xfr. 35 o o , ,
a m ; a c Turbine Bus 3B N l
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M: tors 259 123 .94 293 139 g ; gd a a m o m,
- Resistive 195 195 y 488 139 .50741 197.08 15.9 201.02 193.33+j55.07 S> . o5 S O N E2 m t- >m i e am Turbine MCC 3B h l
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! Mstors 206.9 169 104.. 94 191 118 Resistive 132 132
- 5 '
20.07 296.62 278.61+jl01.79 8
] 323 118 .34388 290.8 g l $w WT MCC 38 {
! Motors 150.5 123 76 .94 139 86 g 1 6 Resistive 96 96 235 86 .25024 399.61 20.1 407.61 382.78+jl40.08 7 1
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U y G 4.16KV UNIT BUS 3B 480V LOAD IMPEDANCES (Cont'd) Q E
- e n, j Converted to [ ,
-4 g KVA KW KVAR Motor 480V Base 5 x
480V 460V Volts KW KVAR MVA Z W 1.02Z R+jx .
k.
V6nt MCC 3B o o a m -
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Motors 299 243 151 .94 275 171 N l
'f 2 cm o l
Rasistive 21 21 g E g*
296 171 .34184 292.53 30.02 298.39 258.36+jl49.29 e hw E E E <: s m 'E-PS sz Recctor Aux mfr 3B w gen Rzector Bus 3B Motors 45 21 .94 51 24 t-* m
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Resistive 20 20
.07495 1334.28 18.68 1360.97 1289.28+j435.89 d9 f
71 24 85 mm Reactor MCC 3B1 b Motors 42.3 35 21 .94 40 24 y i Resistive 57 57 ,
97 24 .09992 1000.75 13.9 1020.77 990.88+j245.22 7 l
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t l'y LJ p G 4.16KV UNIT BUS 3B 480V LOAD IMPEDANCES (Cont'd)
- Q b
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q Converted to E
-4 KVA KW KVAR Motor 480V Base 5 -
Z l 480V 460V Volts KW KVAR MVA Z d 1.02Z R+]x_
,3 R22ctor MCC 3B2 o o a > .
- 5 7 Motors 83.5 68 42 .94 77 48 a y"5 2-.
E
, 3 to o Resistive 147 147 ;; ; @d n e m 224 48 .22909 436.52 12.09 445.25 435.37+j93.26 m y -g m S b #$
st '
OG Press Hester 3B 847 847 847 118.06 0 120.43 120.63+j0 N h [:j 9
Intake xfr 3B --
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Intake Bus 3B Motors 542.9+j335.3
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j 120 74 .94 136 84 .15985 625.59 317 638.1 yg j Em WrMCC 3C b
- Motors 134 109 68 .94 123 77 .14511 689.11 32.05 702.9 595.77+j373 S i 6
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4.16KV UNIT BUS 3A 480V LOAD IMPEDANCES g g 5 :, a e n.
Converted to *
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KVA KW KVAR Motor 480V Base 5 -.
R+jx Z h 480V 460V Volts KW KVAR MVA Z $ 1.02Z 3 lh ES Aux xfr 3A o o , , ,,
p C 3 3 m ES Bus 3A N 5 g f_ j Mstors 275 142 .93 318 164 .3578 279.49 27.28 285.08 253.37+jl30.66 0 5 EO E A y ES MCC 3Al a
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Motors 97.1 80 49 .93 92 57
{h Resistive 213 213 y 305 57 .31028 322.29 10.59 328.73 323.13+j60.41 sm O$
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ES MCC 3A2 d Motors 240.1 196 122 .93 227 141 $! m 5
i Resistive 88 88
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315 141 .34512 289.76 24.11 295.55 269.77+jl20.73 <
g 6
O ES MCC 3AB 7 Motors 119.4 98 60 .93 113 69 b Resistive 39 39 h 152 69 .16693 599.06 24.42 611.04 556.38+j252.62
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4.16KV UNIT BUS 38 480V LOAD IMPEDANCES n =
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Converted to
{
KVA KW KVAR Motor 480V Base $
480V 460V Volts KW KVAR MVA *'.
. 6 1.02Z R+jx v
ES Aux xfr 35 o o , , ,
> a -
e e Mstors 275 142 .93 318 163 .3578 279.49 27.28 285.08 253.37+]130.66 4 g ji j
- ?
EC o E ES MCC 381 Mstors 260.9 213 132 .93 246 153 te- E <m a Raristive 96 96 w gm 272.25 248.52+jl11.16 "
342 153 .37466 266.91 24.1
!! 'm' ES MCC 382 gM Motors 70.95 58 35 .93 67 40 h Resistive 236 236 $m 303 40 .30563 327.19 7.52 333.74 330.87+j43.68
{
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ES MCC 3AB 98 60 .93 113 69 39 39 152 69 .16693 599.06 24.42 611.04 556.38+j252.62 k {y b
Plant Aux xfr 3 733 .733 136.43 0 139.15 139.15+j0 NOTE: As ES MCC 3AB can be supplied frove either ES Bus 3A or ES Bus 3B, for the purpose of the calculation $ $
it was assumed to be supplied from ES Bus 3A. $ %g
ENGINEERED SAFEGUARDS y7
. Gilbert Associates,Inc. BUSES VOLTAGE CALCULATIONS 04-5011-113 ,,
t g m%s " '"' I MICPOFILMED d d b d PAGES 40 CALCULATION o,,,,,,,,,, g Q caTE 7/8/82 CABLE IMPEDANCES 4.16 and 6.9 KV cable impedances were ignored. Previous experience has shown that for voltage drop calculations, these impedances are so small as to be justifiably disregarded.
Although cable impedances from 480 volt switchgear to Motor Control Centers are of little significance, they were taken into account by using actual lengths;the resistance and reactance for 1000 yards were taken from typical 600 V cable information.
l i REACTORS l The per unit values of reactance were taken from " Adequacy of Station Electric
! Distribution Voltages - Crystal River 3" - Calculations dated 11/20/79.
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xfr 3A Press. Htr. MCC 3A 750 3 . 021 . 025 313 .00219 .00261 .9505 1.1328 2.1701 3.3029 g g,g Recctor MCC 3A2 350 2 .0406 .0264 309 .00627 .00408 2.721 1.771 1.997 3.768 w gm mE Intake Aux Intake MCC 3A 350 1 .0406 .0264 60 .00122 .00158 .53 .686 -
.686 n@
xfr 3A .. i, l_
h pm Turbine Aux Turbine MCC 3B 500 2 .0294 .0257 356 .00524 .00457 2.274 1.984 1.997 3.981 4.319
>h g
xf r 3B W MCC 35 500 2 .0294 .0257 416 .00612 .00535 2.656 2.322 1.997 g g; vent MCC 3B 500 2 .0294 .0257 318 .00468 .00409 2.118 1.755 1.997 3.752 g 6, Reactor Aux Reactor MCC 351 500 2 .0294 .0257 530 .00779 .00681 3.381 2.956 -
2.956
{
xfr 3B Press. Htr. MCC 38 750 3 . 021 .025 326 .00228 .00272 .9896 1.181 2.1701 3.3511 ,
Reactor MCC 3B2 500 2 .0294 .0257 347 .0051 .00446 2.214 1.936 -
1.936 E O
Intake Aux W MCC 3C 500 2 .0294 .0257 630 .00926 .0081 4.019 3.516 -
3.516 y u
xfr 3B ES Aux ES MCC 3Al 350 2 .0406 .0264 120 .00244 .00158 1.059 .686 -
.686 bb4 xfr 3A ES MCC 3A2 350 2 .0406 .0264 157 .00319 .00207 1.385 .898 -
.898 -
ES MCC 3AB 500 1 .0294 .0257 265 .00779 .00681 3.381 2.956 -
2.956 ES Aux ES MCC 381 500 2 .0294 .0257 198 .00291 .00254 1.263 1.102 -
1.102 , ,
xfr 3B ES MCC 3B2 500 2 .0294 .0257 226 .00332 .0029 1.441 1.259 -
1.259 a a ES MCC 3AB 500 1 .0294 .0257 295 .00867 .00758 3.763 3.29 -
3.29 4oQ'g" 00 E#-
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.- .. su::JEcv '' GE ENGINEERED SAFEGUARDS BUSES VOLTAGE CALCULATIONS 04-5011-113 19 Gilbert Associates,Inc. ,
" "' I micnor:Luro d d d d paces'0 CALCULATION o,,,,,,,o, g {
o*TE 7/8/82 TRANSFORMER IMPEDANCES The Start Up Transformer equivalent circuit impedance was developed from test data supplied by telephone 6/15/82 from Florida Power Corporation.
The 4160/480 volt transformer impedances were obtained from Test Reports in
- Correspondence File EE (letter dated 7/8/1971.) As it was not known which serial number applied to individual transformers an average value was taken for each KVA rating. Individual values were so close that any variation would be insignificant.
The tap setting for the Start Up Transformer was 224 250 volts which was the setting when voltage measurements were taken.
As FPC did not know the taps on which the 4160/480 volt transformer were set, calculations were performed with those transformers on nominal taps. (Telephone conversation with FPC 6/17/82).
START-UP TRANSFORMER IMPEDAPICES Resistance
- Load Loss H-X = 31.9 KW at 18 MVA Load Loss H-Y = 62.5 KW at 15 MVA Load Loss X-Y = 77.65 KW at 15 MVA Rpu H-X = 31 9 = .001772 at 18 MVA = .009844 at 100 MVA 18000 H-Y . 62.5 = .004167 at 15 MVA = .02778 at 100 MVA 15000 X-Y . 77.65 = .005177 at 15 MVA = .034513 at 100 MVA 15000
- * " "ECT C '^GE ENGINEERED SAFEGUARDS BUSES VOLTAGE CALCULATIONS 0 Gilbert Associates,Inc. 04-5011 113
" ' "' I MICROFILMEO d d d d 40 PAGES CALCULATION o ,,,,,o 4 f>, p OATE 7/8/82 l H0 = HX+HY- 2 H , .009844+.02778 .034513 = .001556 pu 2
OX=E+ -HY , .009844+.034513 .02778 = .008289 pu OY = U+HY q , .034513+.02778 .009844 = .026225 pu ,
Zpu H-X = .0585 pu at 18 MVA = .325 pu at 100 MVA H-Y = .086 lu at 15 MVA = .57333 pu at 100 MVA X-Y = .1158 pu at 15 MVA = .772 pu at 100 MVA HO = .325+.57333 2
.772 = .063165 OX = .325+.772 .57333 = .261835 2
OY = .772+.57333 2
.325 = .510165 Xpu = 2pu2 - R 2pu 1/2 H0 = .0631652 .0015562 1/2 = .063146 l OX = .2618352 .0082892 1/2 = .261704 OY = .5101652 .0262252 1/2 = .509491 l
l l
., ENGINEERED SAFEGUARDS '21 Gilbert Associates, lac. BUSES VOLTAGE CALCULATIONS (y.-5011-113 w n n.w: .: YMICROFf LMED N b b b PAGES gn CALCULATION ,,,,,,,,g g g,y,p DATE 7/8/82 4160/480 VOLT TRANSFORMER IMPEDANCES LOAD PER UNIT KVA LOSS KW R% Z% X% DARE SERIAL NO. IMPEDANCE ON 500 3.816 .7632 4.85 4.7896 1.29.71 48-20329-C1 100 MVA BASE 500 3.831 .7662 4.99 4.9315 1.29.71 48-20329-D1 R X Average .7647 4.8606 1.5294 9.7212 1000 11.973 1.1973 5.35 5.2143 1.26.71 20329-B1 20329-B2 11.871 1.1871 5.32 5.1859 11.858 1.1858 5.28 5.1451 20329-B3 Average 11.9007 1.1907 5.1818 1.1907 5.1818 1500 13.887 .9258 5.36 5.2794 2.10.71 20329-A3 .6172 3.5196 2000 18.705 .9533 5.97 5.8934 5.14.71 48-20329-E01 18.775 .93875 5.96 5.8856 5.14.71 48-20329-E02 19.034 .9517 5.95 5.8734 5.15.71 48-20329-E03 18.39 .9195 5.63 5.5544 5.15.71 48-20329-E04 Average .9408 5.8017 .4704 2.90085 l
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surncT C'S'D Psor ENGINEERED SAFEGUARDS BUSES VOLTACE CALCULATIONS 04-5011-113 22 Gilbert Associates.Inc.
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Y mienorituco N b b b paces 40 CALCULATION ,,,,,,,,,o,4 o*TE 7/8/82 Voltage At 4.16 kv Buses and 6.9 kv Buses H
.001556+j.063165 0 .
.008289+j.261835 .026225+j.509491 eX *Y 3.42021+jl.65634 2.902+jl405
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I 6.9 Motor Load 4.16kv Winding Load
.001556+j.063165 . .001556+j.063165 = $1 10 0 0 o
i 3.4285+jl.9182 2.9282+jl.9145 k.;1.58189+j.96242 = $2 Volts at 0 = 32 = .9815 of Volts at H W
Measured voltage at H = 244.8 kv i Tap = 224.25 kv Equivalent No load volts at H = 244.8/224.25 - 1.091639 p.u.
'#' '* "*'E ENGINEERED SAFEGUARDS 33 Gilbert Associates,Inc.
BUSES VOLTAGE CALCULATIONS 04-5011-113 ,,
g J am- Y MIC RO FIL ME D N b b b PAGES 40 CALCULATION o,,o,,,,o,gg g oavE 7/8/82 Voltage at 0 = .9815 x 1.091639 = 1.07144 p.u.
Voltage at Y = x 1.07144 p.u.
.026225+j 0 h 2+jl.405 l
= .92159 x 1.07144 = .98743 p.m. = .98743 x 4.16 = 4.108 kv .
f This is voltage at 4.16 kv bus.
l We used .99% base voltage at 4 kv motor terminals to determine the motor inpedance, which is very close to .98743 so that no readjustment of motor impedance is necessary Voltage at X = x 1.07144 p.u.
.008289+j 42 2+jl.65634
= .967305x1.07144 = 1.0364 p.u. which is sufficiently close to the value of 1.033 p.u. assumed for motor voltage so that no readjustment of motor inpedance is necessary. ,
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onvr 7/8/82 VOLTAGE AT ES 480V BUS 3A From page 30 E.S. 4.16kv Bus 3A Volts .98743 p.u.
480V Transformer 1.1907+j5.1618 I
480V Load 81.176+j32.19 t
i Voltage at 480V Bus = 81.176+j32.19 x .98743 p.u.
1.1907+j5.1618+81.176+j32.19
= .96556x.98743 = .95342 p.u.
= .95342480 = 457.6 VOLTAGE AT ES 480V BUS 3B From page 30 ES4.16kv Bus 3B Volts = .98743 p.u.
I 1.1907+j5.1618 l
ES480V Bus 3B l
93.375+j34.797 Voltage at 480V Bus . 93.375+334.797 x .98743 1.1907+j5.1618+93.375+j34.797
= .97065 x .98743 .95845 p.u.
=,95845 x 480 = 460V
# * ""' ' ' D ENGINEERED SAFEGUARDS E e 35 Gilbert Associates, lac. BUSES VOLTAGE CALCULATIONS 04-5011-113
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PAGES CALCULATION o,,,,,,,,,, gg, y DATF, 7/8/82 VOLTAGE AT ESMCC3Al From page 29 ES480VBus3A Volts .95342 p.u.
k1.059+j.686 - -
5 FRMCC1A1 323.13+j60.41 Voltage at MCC 3Al'= 323.13+j60.41 x .95342 1.059+j.686+323.13+j60.41
= .99646x.95342 = .95004 p.u.
= .95004x480 = 456 volts VOLTAGE AT ES MCC 3A2 From page 29 ES480V Bus 3A Volts .95342 p.u.
l 1.385+j.898 i
ESMCC3A2 l
269.77+jl20.73 Voltage at MCC 3A2 = 269.77+jl20.73 x .95342 p.u.
1.385+j.898+269.77+jl20.73
= .99451 x .93342 = .94819 p.u.
= .94819 x 480 = 455.1 volts
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cars 7/8/82 VOLTAGE AT ESMCC 381 From page 29 ES480VBus3B Volts .95845 p.u.
1.263+jl.102 . .
I ESMCC3B1 i
248.52+jl11.16 Voltage at MCC 3B1 - 248.52+3111.16 x .95845 p.u.
1.263+jl.102+248.52+jl11.16
= .99415 x .95845 = .9528 p.u.
= .9528 x 480 = 457.3 volts VOLTAGE AT ES MCC 3B2 From page 29 ES480VBus3B Volts .95845 p.u.
l 1.441+jl.259 ESMCC3B2 330.87+j43.68 Voltage at MCC 3B2 = 330.87+i43.68 x .95845 p.u.
1.441+jl.259+330.87+j43.68
= .99524 x .95845 = .95389 p.u.
= .95389 x 480 = 457.9 volts
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ENGINEERED SAFEGUARDS GE 04-5011-113 36 Gilbert Associates,Inc.
BUSES VOLTAGE CALCULATIONS m- " ' ** l MICROFILMED N b b PAGES 40 CALCULATION o ,o,,,,,ogg gg oavr 7/8/82 VOLTAGE AT ESMCC3AB from page 29 ES480VBus3A Volts .95342 p.u.
3.381+j2.956 l ESMCC3AB g
556.38+j282.62 Voltage at ESMCC3AB - 556.38+j252.62 x .95342 3.381+j2.956+j556.38+j252.62
= .99301 x .95342 = .94676 p.u.
= .94676 x 480 = 454.4 volts I
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Vm m.% - " " "' I uicaorituto d d d d pacts 40 CALCULATION o,,,,,,,o ur(, (b, DATE 7/%/82 Measured Values Calculated Plant At Full Load Bus value Steady State Condition 230kv crid 244.8kv 244.8kv 4160V Switchgear ES Bus 3A 4108V 4183V ES Bus 3B 4108V 4179V 480V Switchgear ES Bus 3A 458V 472V ES Bus 3B 460V 475V MCC480V ES 3Al 456V 469V ES 3A2 455V 468V ES 3AB 454V 468V ES 3B1 457V 472V l ES 3B2 458V 471V The calculations were made on the basis of the 4160/480 volt transformers being on the nominal tap. If, however the tap was such as to give a 2-1/2% voltage boost then the 480V switchgear and MCC voltages would be increased by approximately 2-1/2%.
If the voltage on the high voltage side of the startup transformer were 240- 14 =
236.4kv, the calculated voltages would be obtained as a very close approximation by multiplying the calculated voltages in the above table by .965686.
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oaTE 7/8/82 I'apedance of Load on Y vinding of Start Up Transformers = 2.902+j1.405 = 3.224 pu which corresponds to a load of = 31.015 MVA at .9 pf.
FOA 65C rating of Y vinding = 28 MVA.
Impedance of load on ES Aux Transformers 3A = 81.176+j32.19 = 87.325 pu. which corresponds to a load of = . WA 87 5 OA rating of transformers = 1 MVA _
Impedance of load on ES Aux Transformer 3B = 93.375+j34.797= 99.648 pu which corresponds to a load of 99 48= .004 WA OA rating of Transformer = 1 MVA No load volts of Start Up Transformer Y vinding = X 4160 = 4541 volts 2 5 Measured volts on ES 4.16 KV Bus 3A = 4183 volts Drop through Y winding = 4541-4183 = 358 volts Calculated volts on ES 4.16 KV Bus 3A = 4108 Calculated drop through Y vinding = 4541-4108 = 433 i.e. calculated drop is ( - 1) x 100 = 20.95% greater than measured volt drop.
Measured no load volts on ES Aux Transformer 3A
= 4179 x = 482 assuming on nominal tap.
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- * ** I d d d d PAGES 40 ulcR0 FILMED CALCULATION ,,,,,,,,, A .g oATE 7/8/82 Measured volts on ES 480 V Bus 3A = 472 Measured Volt drop through ES Aux Transformer 3A = 482-472 = 10 Calculated n> load volts on ES Aux. Transformer 3A
=4108xf8 g ,474 . .
Calculated voltage on 480 V svgr. bus = 458 Calculated volt drop through ES Aux. Transformer 3A = 474-458 = 16 The discrepancy between calculated and measured voltages is most probably due to loads as measured being appreciably lower than loads used in the calculation.
The calculated load on the 4.16 KV winding of the Start Up Transformer was approximately 31 MVA; the FOA 65 C rating of this winding is 28 MVA. It is improbable that the measurements would be made with a load as great as 28 MVA.
The calculated load on ES Auxiliary Transformer 3A was approximately 1.15 MVA, the OA rating of the transformer being 1 MVA.
Calculated loads in many cases were taken as rated loads of equipment also the condition used in the calculations was that of Maximum Plant Loading including Maximum Engineered Safeguard Loads.
l Previous calculations were approximate and are superseded by the present calculations from which the comparative voltage table is compiled, so that relay settings should be based on the above table.
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C" ATTACHMENT 4 LICENSING PLAN FOR DEGRADED GRID VOLTAGE UNDERVOLTAGE RELAYING PROJECT SCHEDULE PROJECT SCHEDULED MANAGEMENT COMPLETION ITEM NO. DESCRIPTION DATE 282901007 This activity is the completion of 9/2/82 the as-builts of relay cabinets to correct constructibility problem for an installation of the second level undervoltage relays.
282901042 This activity is the preparation of 12/3/82 a scope letter to Gilbert Associates for their preparation of an estimate to perform a Field Change Notice for the second level undervoltage relay-ing design package to resolve con-structibility problem.
282901049 This represents the activity of 12/17/82 Gilbert Associates preparing the scope letter to prepare FCN for MAR 81-1-2.
282901065 This activity is FPC preparing the 1/12/83 work authorization and approval for Gilbert Associates to prepare the FCN to correct the constructibility problem with the undervoltage relay-ing MAR.
282901069 This activity is the actual prepara- 2/24/83 tion of the FCN by Gilbert Associ-ates.
282901084 This activity is the FPC review and 3/10/83 approval of the FCN.
282901090 This is a milestone activity. This 3/10/83 represents the FPC issuing of the FCN to MAR 81-1-2.
282900100 This activity represents the October 11/12/82 transmittal to the NRC of the latest distribution voltage calculations.
282900103 This is the NRC review of the calcu- 1/14/83 lations submitted in October 1982.
282900121 This activity is the development of 11/22/82 the licensing plan and schedule.
282900123 This activity is the NRC review of 12/14/82 the Tech Spec licensing plan.
r
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PROJECT SCHEDULED MANAGEMENT COMPLETION ITEM N0. DESCRIPTION DATE 282900125 This activity represents a possible 12/16/82 meeting between FPC and the NRC to review the content of the licensing plan.
282900127 This is the milestone activity of 1/4/83 the NRC approving the proposed licensing plan.
282900130 This represents the NRC approving 1/4/83 the temporary relay settings submit-ted in the October 1982 submittal.
282900105 This represents the installation of 5/13/83 MAR 81-1-2, the secund le/el under-voltage relaying system.
282900110 This represents the FPC monitor and 5/13/83 review of the performance of the second level undervoltage system and temporary relaying setting.
282900120 This represents the quarterly (or 5/13/83 semiannually) calibration checks on the relay settings.
282900131 This is FPC's preparation of scope 11/15/82 letter to Gilbert Associates for their preparation of additional cal-culations.
282900133 This activity represents Gilbert 1/18/83 preparing the scope letter for revised calculations for changing taps on the 4160 volt transfornier.
282900135 This represents the FPC preparation 2/16/83 of the work authorization and approval for Gilbert Associates to proceed with performing the calcula-tions for revised tap settings.
282900137 This activity is the actual Gilbert 12/15/83 performance of the revised calcula-tions.
282900139 This activity is the FPC review of 1/17/84 the results of the Gilbert calcula-tions.
282900150 This is a possible activity based 1/17/84 upon positive results from the cal-culations and is a milestone activ-ity.
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PROJECT SCHEDULED MANAGEMENT COMPLETION ITEM N0. DESCRIPTION DATE 282900140 This is the other possible milestone 1/17/84 activity based upon results of the calculations being negative.
282900160 Ths activity is transmitting the 1/17/84 revised calculations to the NRC.
282900161 This activity represents the NRC 3/15/84 review of the calculations.
282900163 This activity is the FPC preparation 4/13/84 of revised Tech Specs based on revised tap settings and new relay settings.
282900165 This activity is the changing of the 5/14/84 transformer taps at the plant.
282900167 This activity is rework of the volt- 8/9/84 age test measurements based on new tap settings.
282900169 This activity represents FPC review 9/7/84 of test measurements.
282900171 This activity represents transmittal 9/14/84 of the test measurements and revised calculations to the NRC.
282900173 This activity represents the NRC 11/13/84 review of test measurements.
282900175 This activity represents preparation 1/10/85 of the final Tech Specs.
282900179 This activity represents internal 2/8/85 FPC review of the revised Tech Specs by the NGRC Committee.
282900181 This activity is the NRC review and 4/9/85 approval of Tech Specs.
282900183 This activity is FPC preparing final 5/8/85 relay settings to the plant.
282900190 This activity is the issuance of 5/8/85 final relay settings to the plant.
Klein(List)C4-2