Decay Heat Removal in GEN IV Gas-Cooled Fast Reactors

Table 3

Core parameters.

Flat-to-flat of hexagonal duct (outside), mm	215
Duct wall thickness, mm	3.7
Interassembly gap, mm	7
Number of pins per core subassembly	271
Number of rings (excluding center one)	9
Number of spacers	3
Hydraulic diameter, mm	12.2
Pin pitch (average), mm	12.6
Total pin length, m	3.34
Fuel pellet diameter, ID/OD mm (annular)	3.02/7.37
Fuel clad thickness, mm	1.0
Fuel pin diameter, mm	9.57