Experiment on uranium slabs of different thicknesses with D-T neutrons and validation of evaluated nuclear data

• DOI: 10.1016/j.fusengdes.2017.10.021
• Publication Date: 2017-11-01T01:30:49Z
• Authors: Q. Sun; Z. Chen; R. Han; Y. Nie; S. Zhang; F. Luo; F. Shi; G. Tian; W. Lin; P. Ren; L. Song; X. Ruan; J. Ren
• Keywords: 0103 physical sciences; 7. Clean energy; 01 natural sciences

Abstract In order to validate the evaluated nuclear data for 238U, leakage neutron spectra from pure 238U slab samples of different thicknesses bombarded with 14.8 MeV D-T neutrons were measured at 60 ° (for 10 cm × 10 cm × 2 cm, 10 cm × 10 cm × 5 cm, 10 cm × 10 cm × 11 cm samples) and 120 ° (for 10 cm × 10 cm × 5 cm, 10 cm × 10 cm × 11 cm samples) respectively. The measurement was performed at China Institute of Atomic Energy using time-of-flight method. Monte Carlo simulations were carried out by MCNP-4C code combined with various evaluated nuclear data libraries, namely, ENDF/B-VII.1, JENDL-4.0, CENDL-3.1, JEFF-3.2 and TENDL-2015. The experimental results were compared with the corresponding calculated ones, and the calculation-to-experiment ratio (C/E) which indicates the agreement between them was obtained. The results show that the JENDL4.0 fitted the experimental data best.