Transmutation by Adiabatic Resonance Crossing Experiment (TARC) benchmarking

断熱的共鳴横断効果による核変換実験(TARC)のベンチマーク

Ismailov, K.*; 西原 健司  ; 佐々 敏信   ; 菅原 隆徳  ; 齊藤 正樹*

Ismailov, K.*; Nishihara, Kenji; Sasa, Toshinobu; Sugawara, Takanori; Saito, Masaki*

本研究では断熱的共鳴横断効果による核変換実験(TARC)のベンチマークを行った。JENDL-HE, JENDL-4, JENDL-3.3、及び、LA-150ライブラリを用い、MCNPXコードにより計算を行った。得られた中性子束,共鳴反応のエネルギーと時間の相関、及び、TcとIの核変換率を実験と比較し、以下の知見を得た。(1)JENDL-4の鉛に対する0.01eV-100eVの中性子弾性散乱断面積はほかの核データよりも良い。(2)JENDL-HE(JENDL-3.3)の1-3MeVの非弾性散乱断面積は、実験の誤差が大きいものの、ほかよりも良い。(3)I核変換の解析にはJENDL-4のI捕獲断面積を用いるべきである。

In present study the benchmarking of TARC experiment was done. MCNPX code with JENDL-HE, JENDL-4, JENDL-3.3 and LA-150 nuclear data libraries were used for simulations. The calculated neutron fluences, energy-time correlations of resonance reactions and transmutation rates of Tc and I were compared with experimental measurements. On the base of comparative analysis of simulations the validation of nuclear data libraries was performed and recommendations were given, as follows: (1) the JENDL-4 library contains better neutron elastic cross-section data for natural lead in energy range from 0.01 eV to 100 eV comparing to other considered data libraries; (2) the JENDL-HE (JENDL-3.3) has better neutron inelastic scattering cross-sections for lead in energy range of 1-3 MeV, although the experimental errors in neutron fluence are rather large; (3) neutron capture cross-sections of I in JENDL-4 library should be used for I transmutation process simulations.