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Determination of out-core fuel burnup in TRIGA PUSPATI

Assadat Husain, Mohamad Annuar and Hashim, Suhairul and Ghoshal, Sib Krishna and Rabir, Mohamad Hairie and Zakaria, Norasalwa and Mohamed Zin, Muhammad Rawi and David, Bradley (2019) Determination of out-core fuel burnup in TRIGA PUSPATI. Malaysian Journal of Fundamental and Applied Sciences, 15 (6). pp. 890-894. ISSN 2289-5981


Official URL: https://mjfas.utm.my/index.php/mjfas/article/downl...


The investigation was conducted on the out-core neutron flux and burn-up at irradiated fuel stored in TRIGA PUSPATI research reactor tank. This is required to examine whether the thermal and/or fast neutron flux can influence burn-up of the irradiated fuel stored in the same vicinity of the reactor core, the fuel rack being located 1 m above the core. MCNPX code was used to simulate fast and thermal neutron flux for the reactor operating at 750 kW. In this work, the computational model was created using MCNPX version 2.7 with the evaluated nuclear data file for thermal neutron scattering law data (ENDF7) cross-section data library and using a 10 cm x 10 cm x 10 cm mesh model. The results showed that the axial distribution for thermal neutrons occurred at energy lower than 1 x 10-6 MeV. Thermal neutron traveled at the maximum distance of 78 cm due to thermalization by moderator. Based on the maximum distance traveled by the thermal neutron, the thermal neutron did not reach the storage rack located 1 m from the core, hence there was no burn-up occurring at the irradiated fuel since burn-up can only occur in the thermal neutron region. For fast neutron, the axial distribution energy was higher than 1 x 10-6 MeV and traveled more than 158 cm. The reaction time for the fast neutron was too short to result in burn-up due to its fast travel.

Item Type:Article
Uncontrolled Keywords:Neutron flux, thermal neutron, fast neutron, MCNPX, RTP
Subjects:Q Science > QC Physics
ID Code:85082
Deposited By: Fazli Masari
Deposited On:04 Mar 2020 01:39
Last Modified:04 Mar 2020 01:39

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