Table 1: HWR-1000US key physical parameters in the once-through natural uranium cycle

1 January 2000

 Table 1: HWR-1000US key physical parameters in the once-through natural uranium cycle
Characteristic Value
Fuel inventory (nat U), t 160
Fuel specific heating rate, MWt/t 20
Fuel irradiation time, days 468
Fuel reloading time, days 78
Fuel mean thermal neutron flux, n/cm2 sec 0.5 x 1014
Core radial power peaking factor: beginning of cycle 1.258
end of cycle 1.232
Mean fuel burnup, MWd/t 9500
Breeding ratio 0.800
Equilibrium fuel feed at the load factor of 0.80, t/year 100
Feed fuel U-235 concentration, kg/t 7.10
Discharge fuel concentration, kg/t: U-235 1.75
Pu-239 2.70
Pu-240 1.32
Pu-241 0.30
Pu-242 0.17
Neutron balance, absorptions (fissions): fuel cladding 59
U-235 2215 (1845)
U-238 3685 (252)
U-236 14
fuel admixtures 18
Pu-239 2326 (1600)
Pu-240 332 (2)
Pu-241 221 (166)
Pu-242 3
saturated fission products 347
other fission products 374
fuel channel tubes 76
calandria tubes 178
moderator 152
total absorptions number 10,000
total fissions number 3865
Temperature reactivity coefficients: fuel -1.3 x 10-5
fuel clad +0.2 x 10-5
coolant +0.14 x 10-5
moderator: beginning of cycle -1.0 x 10-5
end of cycle -1.5 x 10-5



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