| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 270906 | Fusion Engineering and Design | 2016 | 4 Pages |
•The fission rate distribution on two depleted uranium assemblies was measured with plate fission chambers.•We do calculations using MCNP code and ENDF/B-V.0 library.•The overestimation of calculations to the measured fission rates was found.•The observed discrepancy are discussed.
New concept of fusion-fission hybrid for energy generation has been proposed. To validate the nuclear performance of fission blanket of hybrid, as part of series of validation experiment, two types of fission blanket assemblies were setup in this work and measurements were made of the reaction rate distribution for uranium fission in the spherical assembly of depleted uranium and polyethylene by Plate Fission Chamber (PFC). There are two PFCs in experiment, one is depleted uranium chamber and the other is enriched uranium chamber. The Monte-Carlo transport code MCNP5 and continuous energy cross sections library ENDF/BV.0 were used for the analysis of fission rate distribution in the two types of assemblies. The calculated results were compared with the experimental ones. The overestimation of fission rate for depleted uranium and enriched uranium were found in the inner boundary of the two assemblies. However, the C/E ratio tends to decrease for the distance from the core slightly and the results for enriched uranium are better than that for depleted uranium.
