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Table 2. PWR fuel assembly designs in South Korea

1 January 2000


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Design parameters 14x14 NPP 16x16 NPP 17x17 NPP OPR1000 APR1400
Fuel rod (FR) array per fuel assembly (FA) 14x14 16x16 17x17 16x16 16x16
No. of FAs in core 121 121 157 177 241
No. of FRs per FA 179 235 264 236 236
FA pitch (mm) 198.20 198.20 215.04 207.78 207.78
FR pitch (mm) 14.12 12.32 12.60 12.85 12.85
FA length (mm) 4063 4058 4063 4528 4528
FA width (mm) 197 197 214 203 203
FR diameter (mm) 10.16 9.50 9.50 9.50 9.50
No. of spacer grids 7 8 8 11 11
No. of guide thimble tubes 16 20 24 4 4
No. of instrumentation tubes 1 1 1 1 1
Holddown spring shape Leaf spring Leaf spring Leaf spring Coil spring Coil spring

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