Abstract
As a benchmark test of JENDL-4.0/HE released in 2015, we have analyzed the concrete and iron shielding experiments with the quasi mono-energetic 40 and 65 MeV neutron sources at TIARA in JAEA by using MCNP5 and ACE files processed from JENDL-4.0/HE with NJOY2012. As a result, it was found out that the calculation results with JENDL-4.0/HE agreed with the measured ones in the concrete experiment well, while they underestimated the measured ones in the iron experiment with 65 MeV neutrons more for the thicker assemblies. We examined the 56 Fe data of JENDL-4.0/HE in detail and it was considered that the larger non-elastic scattering cross sections of 56 Fe caused the underestimation in the calculation with JENDL-4.0/HE for the iron experiment with 65 MeV neutrons.
Highlights
A Japanese Evaluated Nuclear Data Library (JENDL) special purpose file, JENDL-4.0 High Energy File (JENDL-4.0/HE) [1], is an extended version of JENDL4.0 for incident neutrons up to 200 MeV for 130 nuclei, and a nuclear data library for incident protons up to 200 MeV for 133 nuclei, which are relevant to high-energy accelerator applications
The calculation results with JENDL/HE-2007 and JENDL-4.0/HE agree with the measured one well, though the calculation result with JENDL-4.0/HE is slightly better than that with JENDL/HE-2007
The calculation result with JENDL-4.0/HE nonelas is almost the same as that with FENDL-3.1b
Summary
A Japanese Evaluated Nuclear Data Library (JENDL) special purpose file, JENDL-4.0 High Energy File (JENDL-4.0/HE) [1], is an extended version of JENDL4.0 for incident neutrons up to 200 MeV for 130 nuclei, and a nuclear data library for incident protons up to 200 MeV for 133 nuclei, which are relevant to high-energy accelerator applications. The neutron spectra above 10 MeV just behind the test concrete or iron shield on beam axis were measured with a BC501A scintillation detector These experiments are very useful for benchmarking higher energy neuron incident nuclear data libraries [3]. 1) Concrete experiments : The calculation result with JENDL/HE-2007 agrees with the measured one best Those with FENDL-3.0 and ENDF/B-VII. drastically overestimate the measured data. In this study we carry out a benchmark test of JENDL4.0/HE with the concrete and iron shielding experiments at TIARA in JAEA
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