Civil Engineering Reference
In-Depth Information
Table 3.2
Design characteristics of the large PWR power plants of Westinghouse (AP1000) and
Mitsubishi (US-APWR) [
2
,
3
,
5
]
Westinghouse
Mitsubishi
AP1000
US-APWR
Reactor power
Thermal
MW(th)
3,415
4,451
Electrical
MW(e)
1,115
1,700
Plant efficiency
%
33
38
Number of coolant loops
2
4
Reactor core
Equivalent core diameter
m
3.04
4.22
Active core height
m
4.27
3.65
Specific core power
kW(th)/l
110
87
Density
kW(th)/
kg U
40
32
Number of fuel elements
157
257
Total amount of fuel (uranium
mass)
kg U
84,000
138,500
Fuel element and control element
Fuel
UO
2
UO
2
U-235 fuel enrichment
-reloading
wt%
2.4-4.5
4-5
ZIRLO
TM
Cladding material
Zircaloy-M5
Cladding outer diameter
mm
9.50
9.50
Cladding, thickness
mm
0.57
0.57
Fuel rod spacing
mm
12.6
12.6
Av. specific fuel rod power
W/cm
187
153
Fuel assembly array
17
17
17
17
Control/absorber rods
Absorber material
69 rods inserted in fuel
element
Ag, In, Cd, stainless steel
69 rods inserted in fuel
element
Ag, In, Cd
Number of fuel rods per fuel
element
264
264
Burnable poison
boric acid
Gd and boric acid
Number of control elements
24
89
Heat transfer system
Primary system
Total coolant flow
Core flow rate
t/s
18.9
19.3
Coolant pressure
MPa
15.5
15.8
C
Coolant inlet temp.
281
288
C
Coolant outlet temp.
321
328.2
Steam supply system
Steam pressure
MPa
5.5
6.7
C
Steam temperature
271
284
Fuel cycle
Average fuel burn up
MWd/ton
60,000
60,000
(continued)
