Open AccessKinetic parameters study based on burn-up for improving the performance of research reactor equilibrium core
Author(s) -
Atta Muhammad,
Masood Iqbal,
Tayyab Mahmood
Publication year - 2014
Publication title -
nuclear technology and radiation protection
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.31
H-Index - 16
eISSN - 1452-8185
pISSN - 1451-3994
DOI - 10.2298/ntrp1404253m
Subject(s) - nuclear engineering , core (optical fiber) , research reactor , neutron , materials science , nuclear reactor core , delayed neutron , nuclear physics , neutron temperature , uranium , prompt neutron , kinetic energy , radiochemistry , chemistry , physics , composite material , engineering , quantum mechanics
In this study kinetic parameters, effective delayed neutron fraction and prompt neutron generation time have been investigated at different burn-up stages for research reactor's equilibrium core utilizing low enriched uranium high density fuel (U3Si2-Al fuel with 4.8 g/cm3 of uranium). Results have been compared with reference operating core of Pakistan research Reactor-1. It was observed that by increasing fuel burn-up, effective delayed neutron fraction is decreased while prompt neutron generation time is increased. However, over all ratio beff/L is decreased with increasing burn-up. Prompt neutron generation time L in the understudy core is lower than reference operating core of reactor at all burn-up steps due to hard spectrum. It is observed that beff is larger in the understudy core than reference operating core of due to smaller size. Calculations were performed with the help of computer codes WIMSD/4 and CITATION