Abstract
The fusion-reactor blanket is very important, as it is responsible for the tritium self-sustaining, energy gain, and radiation shielding. Due to the complex structure, large geometry size and inhomogeneous neutron-flux distribution, the Monte-Carlo method is widely used for the neutronics analysis of fusion-reactor blanket, but it takes a large amount of computational time for acceptable simulation results. The deterministic code is the better choice for the fusion-reactor blanket. The geometry capability and accuracy limitation are the most important issues for the deterministic code to simulate the fusion-reactor blanket. Therefore, the newly deterministic code named NECP-FISH has been developed for the fusion-reactor blanket, in which the spherical harmonic function and finite element method were applied. Moreover, the open-source platform SALOME has been applied to generate the complex geometry as pre-process of NECP-FISH. As code verification, NECP-FISH has been applied to simulate the Breeding Unit of HCCB-DEMO, using Monte-Carlo code to provide the reference results. It can be observed that the simulation results of the tritium breeding ratio (TBR), neutron flux and heat release rate provided by NECP-FISH are agreed well with corresponding values by the Monte-Carlo code.
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