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[en] The NRU research reactor has been used to obtain data to understand and quantify the effects of irradiation on nuclear reactor components through their in-service lives and to develop improved designs and components. Apart from the Mark-4 and Mark-7 fast neutron rod material testing facilities in NRU, the high-pressure/high-temperature experimental loops provide an environment similar to the CANDU reactor core, where test materials are subjected to simulated power reactor conditions. Nuclear materials are tested in the loops using Material Test Bundles (MTB). This paper describes how the MTB is designed to operate in the NRU loops. It also describes the physics calculation of the 89-energy-group neutron spectrum in the MTB and its comparison with the spectrum in CANDU power reactors. The predictions of spectral effects on nuclear material behaviour, such as material damage and helium generation are summarized. (author)
Source
Canadian Nuclear Society, Toronto, Ontario (Canada); Canadian Nuclear Laboratories, Chalk River, Ontario (Canada); 44.8 Megabytes; ISBN 978-1-926773-17-9; 
; 2014; [12 p.]; 3. International technical meeting on small reactors; Ottawa, Ontario (Canada); 5-7 Nov 2014; Available from the Canadian Nuclear Society, Toronto, Ontario (Canada); 9 refs., 2 tabs., 7 figs.
; 2014; [12 p.]; 3. International technical meeting on small reactors; Ottawa, Ontario (Canada); 5-7 Nov 2014; Available from the Canadian Nuclear Society, Toronto, Ontario (Canada); 9 refs., 2 tabs., 7 figs.