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- W31408471 abstract "Recently, there has been considerable interest in designs with improved conversion ratios relative to current pressurized water reactor systems. In the high-conversion reactor (HCR) concept, a higher conversion ratio is achieved by increasing the fuel-to-moderator ratio and using mixed-oxide fuel. It has been found that this configuration, with the resulting epithermal neutron energy spectrum, can lead to a positive moderator void coefficient. The goal of this work, which was an extension of previous studies, was to quantify the uncertainty in the void coefficient due to uncertainties in the basic nuclear cross sections. Uncertainty data for cross sections are currently available in the form of covariance matrices from ENDF/B-V. The uncertainty in the void coefficient has been estimated for a typical HCR system at both the low- and high-void conditions. Relatively high correlation between the PROTEUS and HCR models indicate that the PROTEUS experiments were ideally suited for providing information about the HCR design. Unfortunately, the measurement uncertainty is large compared to the calculated uncertainty, preventing any significant, reduction of the calculated variance. Nevertheless, the quantification of the computed void coefficient may prove to be useful in the design and licensing of the HCR concept." @default.
- W31408471 created "2016-06-24" @default.
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- W31408471 date "1990-06-01" @default.
- W31408471 modified "2023-09-23" @default.
- W31408471 title "Quantifying the void coefficient uncertainty in high-conversion reactor systems" @default.
- W31408471 hasPublicationYear "1990" @default.
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