密度減少法で作成したウェイトウィンドウによるモンテカルロ計算分散低減に関する研究

抄録

  Huge calculation time is required to evaluate neutron flux behind a shield in very large scale and complicated geometry such as a nuclear fusion reactor by Monte Carlo calculation. The density reduction method is proposed as a new methodology for the weight window generator on the variance reduction method to reduce calculation time in the present study. Calculation time can be drastically reduced by applying the density reduction method. It can be concluded that this method is very useful for the shielding calculation of very large scale and complex geometry such as a fusion reactor.