Benchmark experiment on LiAlO2, Li2TiO3 and Li2ZrO3 assemblies with D–T neutrons–leakage neutron spectrum measurement

For the three materials LiAlO2, Li2TiO3 and Li2ZrO3, known as advanced breeder materials for a fusion reactor, D–T neutron benchmark experiments have been conducted at fusion neutronics source (FNS) of Japan Atomic Energy Research Institute (JAERI), Japan, to validate five nuclear data files, i.e. JENDL-3.2, JENDL fusion file, ENDF/B-VI, FENDL/E-1.0 and FENDL/E-2.0. From the result, all the nuclear data files were confirmed to be fairly reliable with respect to the prediction of neutron spectrum in the use of LiAlO2 and Li2TiO3. However, it was recommended that the inelastic scattering neutron spectra of oxygen, lithium and aluminium in the five nuclear data files had to be re-examined. As for zirconium, it was pointed out that the natZr(n, 2n) cross section could be overestimated for the five nuclear data files.