Abstract
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. The howitzer cover which is made from steel shields the gamma-rays caused by the neutron capture reaction of boron. The simulation has been done using the MCNP5 program. The result shows that the design met requirements of usage and radiation safety rules in Vietnam.
Highlights
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
Summary
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. 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. 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
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