# Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2018, Vol. 29 ›› Issue (10): 140

• NUCLEAR ENERGY SCIENCE AND ENGINEERING •

### Preparation and verification of mixed high-energy neutron cross section library for ADS

Ze-Long Zhao 1,2 • Yong-Wei Yang 1 • Hai-Yan Meng 1 • Qing-Yu Gao 1,2 • Yu-Cui Gao 1

1. 1 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
2 University of Chinese Academy of Sciences, Beijing 100049, China
• Contact: Yong-Wei Yang E-mail:yangyongwei@impcas.ac.cn
• Supported by:

This work was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (No. XDA03030102).

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Ze-Long Zhao, Yong-Wei Yang, Hai-Yan Meng, Qing-Yu Gao, Yu-Cui Gao. Preparation and verification of mixed high-energy neutron cross section library for ADS.Nuclear Science and Techniques, 2018, 29(10): 140

Abstract:

An accelerator-driven subcritical system (ADS) is driven by an external spallation neutron source, which is generated from a heavy metal spallation target to maintain stable operation of the subcritical core, where the energy of the spallation neutrons can reach several hundred megaelectron volts. However, the upper neutron energy limit of nuclear cross-section databases, which are widely used in critical reactor physics calculations, is generally 20 MeV. This is not suitable for simulating the transport of highenergy spallation neutrons in the ADS. We combine the Japanese JENDL-4.0/HE high-energy evaluation database and the ADS-HE and ADS 2.0 libraries from the International Atomic Energy Agency and process all the data files for nuclides with energies greater than 20 MeV. We use the continuous pointwise cross-section program NJOY2016 to generate the ACE-formatted cross-section data library IMPC-ADS at multiple temperature points. Using the IMPC-ADS library, we calculate 10 critical benchmarks of the International Criticality Safety Benchmark Evaluation Project manual, the 14-MeV fixed-source problem of the Godiva sphere, and the neutron flux of the ADS subcritical core by MCNPX. To verify the correctness of the IMPCADS, the results were compared with those calculated using the ENDF/B-VII.0 library. The results showed that the IMPC-ADS is reliable in effective multiplication factor and neutron flux calculations, and it can be applied to physical analysis of the ADS subcritical reactor core.