Characterization of neutron spectrum on the TRIGA 2000 reactor core using a passive single-moderator neutron spectrometer
Rasito Tursinah, Sidik Permana, Zaki Su^ud, Alan Maulana, Iso Suwarso, Prasetyo Basuki, Teguh Subekti, Tri C. Laksono, Putu Sukmabuana

Nuclear Science and Engineering Department, Bandung Institute of Technology, Jl. Ganeca 10, Bandung, Indonesia
Research Organization for Nuclear Energy, National Research and Innovation Agency, B.J. Habibie Science and Technology Park, Setu, Tangerang Selatan, Banten, Indonesia
Directorate of Nuclear Energy Facilities Management, National Research and Innovation Agency, Jl. Tamansari 71, Bandung, Indonesia

Abstract

The neutron spectrum in the reactor core has a shape with a combination of thermal, epithermal and fast neutrons. Neutron spectrum measurements in the reactor core generally use the multi-foil technique. However, measurements using this technique are quite difficult, expensive to manufacture, but provide less accurate results. The SCNS-reactor has been developed which is a single-moderator neutron spectrometer based on a passive neutron detector for measuring the neutron spectrum in the reactor core. Neutron spectrum measurements have been carried out on the surface of the TRIGA 2000 reactor core using a SCNS-reactor operated at 100 W for 30 minutes. The results of these neutron spectrum measurements were compared with simulations using MCNPX with ENDF7 nuclear data for neutron interactions with fuel and reactor core components, as well as S(&#945-,&#946-) for neutron interactions with the water moderator.

Keywords: Neutron spectrum- reactor core- TRIGA 2000- SCNS-reactor

Topic: Radiation Physics