The document describes the key parameters of a three-zone once-through steam generator, including the cooling water flow rate, tube specifications, effective surface areas, heat transfer rates, and temperatures of each zone. It then shows calculated performance results across a range of circulation water inlet temperatures from 35 to 75 degrees Fahrenheit, indicating changes in generated power, pressures, heat loads, and cleanliness factors compared to predicted design values.

6. Description LP Zone IP Zone HP Zone
Cooling Water Flow, GPM 246,460 246,460 246,460
Number of Tubes, NT 13,610 13,610 13,610
Tube Diameter D, in. 1.125 1.125 1.125
Tube Wall Thickness, BWG 18 18 18
Effective Tube Length L, ft. 29.982 33.458 36.367
Tube Material 90_10CuNi 90_10CuNi 90_10CuNi
Number of Water Passes, NP 1 1 1
GPM/Tube at 1.0 fps, g 2.562 2.562 2.562
Water Velocity V, fps 7.01 7.01 7.01
Area Per Ft. of Length, m 0.2945 0.2945 0.2945
Effective Surface Area S, sq.ft. 120,172 134,105 145,724
Constant a 0.0591 0.0591 0.0591
Factor b 0.9 0.9 0.9
Cleanliness Factor, %CF 85 85 85

7. Length of Water Travel,
Ft.
Temperature,
F
Tinlp =
50.0 F
Tinip = Toutlp = 61.36
F
Tinhp = Toutip = 72.72
F
TSlp = 83.47
F
TSip = 88.90 F
TShp = 97.04
F
Touthp = 84.08
F
TTDlp = 22.11 F
Llp = 29.982 Lip = 33.458 Lhp = 36.357
TTDip = 16.18 F
TRlp = 11.36 F
TRip = 11.36 F
TTDhp = 12.96 F
TRhp = 11.36 F
ITDlp = 33.47 F
ITDip = 27.54 F
ITDhp = 24.32 F
Slp = 120,172 sq.ft.
Sip = 134,106
sq.ft.
Shp = 145,724
sq.ft.
LMTDlp = 27.40 F
Ulp = 425.13 btu/hr/sq.ft-F
Qlp = 1.4 billion btu/hr
Uip = 488.74 btu/hr/sq.ft-F
LMTDip = 21.36 F
Uhp = 532.36 btu/hr/sq.ft-
F
LMTDhp = 18.05 F
Qip = 1.4 billion btu/
hr
Qhp = 1.4 billion btu/
hr
AVERAGE SATURATION TEMP. = 89.80
F
LP SECTION IP SECTION HP SECTION

11. 35.00 246,460 1.363 1.354 1.368 11.06 10.99 11.10 0.904 0.942 1.146 85.00 85.00 85.00 638,922
40.00 246,460 1.368 1.355 1.361 11.10 10.99 11.05 0.957 1.046 1.299 85.00 85.00 85.00 638,941
45.00 246,460 1.373 1.356 1.357 11.14 11.00 11.01 1.034 1.175 1.482 85.00 85.00 85.00 638,583
50.00 246,460 1.376 1.357 1.356 11.17 11.01 11.00 1.135 1.331 1.701 85.00 85.00 85.00 637,533
55.00 246,460 1.381 1.361 1.356 11.66 11.49 11.44 1.294 1.569 2.045 85.00 85.00 85.00 634,711
60.00 246,460 1.386 1.366 1.360 11.69 11.52 11.47 1.454 1.800 2.361 85.00 85.00 85.00 631,093
65.00 246,460 1.391 1.372 1.365 11.74 11.58 11.52 1.647 2.073 2.730 85.00 85.00 85.00 626,060
70.00 246,460 1.397 1.380 1.373 11.79 11.64 11.59 1.878 2.393 3.156 85.00 85.00 85.00 619,585
75.00 246,460 1.405 1.390 1.383 11.85 11.73 11.67 2.152 2.767 3.641 85.00 85.00 85.00 611,755
CIRC.
WATER
INLET
TEMP.
Tinlp, F
LP
ZONE
PRESS.
PSlp,
IN.HGA
GEN.
OUTPUT,
KW
HP ZONE
PRESS.
PShp,
IN.HGA
IP ZONE
PRESS.
PSip,
IN.HGA
LP
ZONE
CFlp,
%
IP
ZONE
CFip,
%
IP
ZONE
TRip,
F
HP
ZONE
TRhp,
F
HP
ZONE
CFhp,
%
LP
ZONE
TRlp,
F
CIRC.
WATER
FLOW
RATE,
GPM
LP
ZONE
HEAT
LOAD
Qlp,
10
9
btu/hr
IP
ZONE
HEAT
LOAD
Qip,
10
9
btu/hr
HP
ZONE
HEAT
LOAD
Qhp,
10
9
btu/hr

16. 1856.63 1850.09 45.28 1.061 1.375 1.780 84.70 70.57 64.69 248,193 630,001
1850.00 1843.46 45.28 1.062 1.377 1.756 84.70 70.57 64.69 248,193 628,727
1850.00 1843.46 45.28 1.047 1.192 1.488 85.00 85.00 85.00 248,193 630,096
1850.00 1843.46 45.28 1.052 1.199 1.499 85.00 85.00 85.00 246,460 630,058
1856.38 1849.88 50.27 1.153 1.518 1.968 85.47 72.03 66.95 249,736 626,400
1850.00 1843.50 50.27 1.152 1.517 1.947 85.47 72.03 66.95 249,736 625,182
1850.00 1843.50 50.27 1.147 1.346 1.699 85.00 85.00 85.00 249,736 626,987
1850.00 1843.50 50.27 1.158 1.361 1.724 85.00 85.00 85.00 246,460 626,837
1856.76 1850.28 54.98 1.290 1.668 2.208 84.01 74.58 68.63 249,428 625,209
1850.00 1843.52 54.98 1.290 1.667 2.185 84.01 74.58 68.63 249,428 623,897
1850.00 1843.52 54.98 1.270 1.526 1.943 85.00 85.00 85.00 249,428 626,014
1850.00 1843.52 54.98 1.279 1.541 1.969 85.00 85.00 85.00 246,460 625,794
1856.66 1850.14 58.46 1.406 1.818 2.415 82.91 74.78 68.94 250,498 622,798
1850.00 1843.48 58.46 1.406 1.817 2.390 82.91 74.78 68.94 250,498 621,532
1850.00 1843.48 58.46 1.372 1.671 2.136 85.00 85.00 85.00 250,498 624,053
1850.00 1843.48 58.46 1.385 1.694 2.174 85.00 85.00 85.00 246,460 623,666
1855.82 1849.29 65.26 1.757 2.267 2.932 76.51 70.62 68.96 250,667 615,596
1850.00 1843.47 65.26 1.759 2.269 2.902 76.51 70.62 68.96 250,667 614,695
1850.00 1843.47 65.26 1.622 2.020 2.596 85.00 85.00 85.00 250,667 619,231
1850.00 1843.47 65.26 1.638 2.048 2.644 85.00 85.00 85.00 246,460 618,639
PREDICTED AT DESIGN CF
PREDICTED AT DESIGN CF, GPM
PREDICTED AT DESIGN CF
PREDICTED AT DESIGN CF, GPM
ACTUAL PERFORMANCE
NORMALIZED PERFORMANCE
PREDICTED AT DESIGN CF
PREDICTED AT DESIGN CF, GPM
ACTUAL PERFORMANCE
NORMALIZED PERFORMANCE
ACTUAL PERFORMANCE
NORMALIZED PERFORMANCE
PREDICTED AT DESIGN CF
PREDICTED AT DESIGN CF, GPM
LP ZONE
PRESS.,
IN.HGA
DESCRIPTION
ACTUAL PERFORMANCE
NORMALIZED PERFORMANCE
HP
ZONE
CF, %
CIRC.
WATER
FLOW,
GPM
GEN.
OUTPUT,
KW
REACTOR
CORE
POWER,
MWT
NSSS
THERMAL
POWER,
MWT
IP ZONE
PRESS.,
IN.HGA
HP ZONE
PRESS.,
IN.HGA
LP
ZONE
CF, %
IP
ZONE
CF, %
COLD
WATER
TEMP. F
ACTUAL PERFORMANCE
NORMALIZED PERFORMANCE
PREDICTED AT DESIGN CF
PREDICTED AT DESIGN CF, GPM

17. 45.28 628,727 630,096 630,058 1,369 -38 1,331
50.27 625,182 626,987 626,837 1,805 -150 1,655
54.98 623,897 626,014 625,794 2,117 -220 1,897
58.46 621,532 624,053 623,666 2,521 -387 2,134
65.26 614,695 619,231 618,639 4,536 -592 3,944
Capacity
Loss Due
to CF &
GPM, Kw
Circ.
Water
Inlet
Temp.,
F
Normalized
Gen.
Output, Kw
Pred. Gen.
Output At
Design CF,
Kw
Pred. Gen.
Output At
Design CF
& GPM, Kw
Capacity
Gain Due
to GPM,
Kw
Capacity
Loss Due
to CF, Kw