Sensitivity to nuclear data of the design of the IFMIF-DONES beam dump

Frontiers in Physics

Physics

Francisco Ogando¹  Patrick Sauvan¹  Victor Lopez² 

[1] Universidad Nacional de Educación a Distancia (UNED), Escuela Técnica Superior de Ingenieros Industriales, Departamento de Ingeniería Energética, Madrid, Spain;null;

关键词: IFMIF-DONES;    beam dump;    nuclear data;    breakup;    neutronics;   

DOI  :  10.3389/fphy.2023.1144057

 received in 2023-01-13, accepted in 2023-05-16,  发布年份 2023

来源: Frontiers

【 摘 要 】

During the commissioning and start-up phases of IFMIF-DONES, the 40 MeV deuteron beam will be stopped in a conical beam stopper made of copper, giving rise to intense neutron fields. Accurate coupled deuteron-neutron transport simulations are required in order to prevent the potential risks to the workers and equipment involved. However, the experimental data concerning the neutron emission under these circumstances is scarce and limited to a particular range of energies. Different deuteron nuclear data libraries such as JENDL-5 and special files of TENDL-2021 exhibit some differences on the spectrum of the emitted neutrons. The differences are present in the high energy tails, beyond the available experimental data. Calculations of the prompt neutron fields have been performed employing both deuteron data libraries, as well as employing an estimation of the neutron energy-angle distribution derived from experimental data at different irradiation energies. Even though the high energy tails represent a small part of the flux, they have a major impact on the dose rates. The disparity of the results evinces large uncertainties in the IFMIF-DONES beam dump design process. Further experiments are required in order to resolve the differences among nuclear data libraries and reduce the uncertainty.

【 授权许可】

Unknown   
Copyright © 2023 Lopez, Ogando and Sauvan.