Title of article :
Assessment of Neutron Flux Gradients in Irradiation Channels at the TRIGA Reactor by Au-Cr-Mo Monitor Set Based on k0-INAA
Author/Authors :
SIONG, KHOO KOK Universiti Kebangsaan Malaysia - Faculty of Science and Technology - School of Applied Physics, Malaysia , SARMANI, SUKIMAN Universiti Kebangsaan Malaysia - School of Chemical Sciences Food Technology, Malaysia , ABDUL MAJID, AMRAN Universiti Kebangsaan Malaysia - School of Chemical Sciences Food Technology, Malaysia , LEONG, TI KIEN Universiti Kebangsaan Malaysia - Faculty of Science and Technology - School of Applied Physics, Malaysia
Abstract :
A gradient of neutron flux distribution in an irradiation channel in research reactor is considered to have effect on the k0-instrumental neutron activation analysis (k0-INAA) measurement. A study has been carried out to determine: (1) the variation of the thermal to epithermal neutron flux ratio (f); (2) the epithermal neutron flux shape factor (a), and (3) the neutron flux in an irradiation container at four selected irradiation channels, use being made of an Au-Cr-Mo monitor set. In this work, f was found to range from 15.5 – 16.3, while a was found to range from 1.52 x 10-2 – 5.58 x 10^-2. Additionally, within the selected irradiation channels the variation in calculated thermal neutron flux within one irradiation container was found to vary from 11.8% - 26.7%. The results of analysis have provided a determination of variation in the neutron parameters, f and a, and neutron flux between the irradiation channels and within the irradiation container
Keywords :
k0 , INAA , neutron flux distribution , neutron parameters
