Abstract The neutron flux trap effect was experimentally studied in the subcritical assembly of the Atomic and Nuclear Physics Laboratory of the Aristotle University of Thessaloniki, using delayed gamma neutron activation analysis. Measurements were taken within the natural uranium fuel grid, in vertical levels symmetrical to the Am–Be neutron source, before and after the removal …

Flux trap effect study in a sub-critical neutron assembly using activation methods Read More »

Abstract Assessment of the gamma heating deposited on samples irradiated in material testing reactors is basic safety issue. The GHRRC (Gamma Heating in Research Reactor Cores) code developed in NCSR ¿Demokritos¿ is used here to estimate the relative importance of the mechanisms contributing to the total gamma heating of the irradiated material, for a core …

Effect of reactor fuel enrichment on gamma heating of irradiated samples Read More »

Abstract When depleted control rods are planned to be used in new core configurations, their worth has to be accurately predicted in order to deduce key design and safety parameters such as the available shutdown margin. In this work a methodology is suggested for the derivation of the distributed absorbing capacity of a depleted rod, …

Estimation of irradiated control rod worth Read More »