In this paper, the design evaluation of a neutron howitzer using for research and education purposes in Training Center at Dalat Nuclear Research Institute is presented. A mixture of paraffin and boron is used as both moderator and absorber in order to shield neutron from the 252Cf source. | TAÏP CHÍ PHAÙT TRIEÅN KH&CN, TAÄP 20, SOÁ T2- 2017 Design and evaluation of neutron howitzer design for the research and education using MCNP5 program Truong Van Minh Dong Nai University Nguyen Ngoc Anh Ho Huu Thang Nguyen Xuan Hai Dalat Nuclear Research Institute Dinh Tien Hung Military Institute of Chemical and Environmental Engineering (Received on 25 th November 2016, accepted on 22 th May 2017) ABSTRACT cover which is made from steel shields the In this paper, the design evaluation of a gamma-rays caused by the neutron capture neutron howitzer using for research and reaction of boron. The simulation has been done education purposes in Training Center at Dalat using the MCNP5 program. The result shows that Nuclear Research Institute is presented. A the design met requirements of usage and mixture of paraffin and boron is used as both radiation safety rules in Vietnam. moderator and absorber in order to shield neutron from the 252Cf source. The howitzer Keywords: Neutron howitzer, paraffin howitzer, howitzer design INTRODUCTION Neutron howitzer is an efficient instrument for research and education purposes, which have to use isotope neutron sources such as 252Cf [1]. Neutron howitzer can be classified according to usage purposes or neutron moderators. Two materials, which are mainly used as moderator, are paraffin and water. In 2011, a water neutron howitzer was established in the Training Center (TC) at Dalat Nuclear Research Institute (DNRI) [2]. This kind of howitzer was very convenient to perform experiments related to neutron moderation and neutron diffusion. Based on the water howitzer, many experiments, such as neutron migration area determination and neutron diffusion length determination were successfully built. However, the structure of the water howitzer was inconvenient to setup shielding experiments, neutron cross-section determination, neutron activation analysis, neutron dose calibration and some others. Therefore, in order to .
