Abstract
New advanced reactors require zero-power experiments to validate the correctness of design. In order to ensure sufficient validation strength, certain similarity of physical properties between zero-power experimental reactor and the target reactor is required. Based on sensitivity and uncertainty analysis techniques, three indexes for evaluating the physical similarity between reactor systems were introduced. Based on the Monte Carlo transport program MONK, a coupled similarity analysis program MCS was compiled. The results of MCS were compared with TSUNAMI’s and the two programs showed good agreement. Finally, the similarity between the CEFR in MOX fuel loading design and the BFS-119-2 zero-power experiment scheme given by IPPE was calculated by MCS. The results showed that the two systems were very similar to each other, and the physical properties of the CEFR-MOX loading design could be validate by the zero-power experiment.
Highlights
Zero-power experiment is an indispensable stage in the design of the new tpye reactor[? ].As shown in Figure 1. zero-power experiment determines the validation domain, and the target reactor determines the application domain
In order to study the characteristics of MOX fuels under fast neutron energy spectrum, it is necessary to replace the fuel with MOX fuel
The similarity of physical properties between zero-power experimental reactor and the target reactor is quantitatively evaluated from three aspects: the magnitude of the nuclide sensitivity, the source of the keff uncertainty, and the energy spectrum
Summary
Zero-power experiment is an indispensable stage in the design of the new tpye reactor[? ].As shown in Figure 1. zero-power experiment determines the validation domain, and the target reactor determines the application domain. It is necessary to keep a certain similarity in physical properties between zero-power experimental reactor and the target reactor. The similarity of physical properties between zero-power experimental reactor and the target reactor is quantitatively evaluated from three aspects: the magnitude of the nuclide sensitivity, the source of the keff uncertainty, and the energy spectrum. ]. In order to establish a scientific similarity analysis method between zero-power reactor and target reactor, a method based on sensitivity and uncertainty analysis techniques was proposed[? By using this technique to evaluate the similarity of nuclide sensitivity magnitude and the similarity of ke f f uncertainty sources, the similarity of physical properties between two systems can be quantitatively evaluated
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