|
KMID : 0364920110360020059
|
|
Journal of Radiation Protection and Research
2011 Volume.36 No. 2 p.59 ~ p.63
|
|
|
MCNPX Simulation of Scattered Neutron Distribution in Experimental Room for the Neutron Reference Field of Monoenergetic Neutron below 2.5 MeV
|
|
Park Jung-Hun
Kim Gi-dong
|
|
|
Abstract
|
|
|
|
It is important to reduce indirect scattered neutron beside direct neutron of chosen energy for designing a neutron-reference-field laboratory with neutron produced from a nuclear reaction by a accelerator. Therefore MCNPX simulation was performed with various conditions for obtaining such condition. At first in the original laboratory condition we calculated the direct neutron flux which was inserted in chamber (virtual chamber composed of air) of 0 degree (proton moving direction) for neutron flux measurement and the scattered neutron flux which is inserted in the chamber after scattering wall or bottom. In the result, the scattered neutron which was inserted after scattering bottom is more than that which was inserted after scattering the others. Therefore MCNPX simulation was again performed with removing the concrete bottom and with removing the concrete bottom and digging 1 m in the ground. In the result of removing concrete bottom and digging 1 m in the ground, scattered neutron which was inserted after scattering bottom became less than that which was inserted after scattering the others.
|
|
|
KEYWORD
|
|
|
Neutron reference field, Scattered neutron, MCNPX, Accelerator
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|