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Science and Technology of Nuclear Installations
Volume 2014 (2014), Article ID 509858, 4 pages
Research Article

Impact of Thorium Capture Cross Section Uncertainty on the Thorium Utilized ADS Reactivity Calculation

1Osaka University, 2-1, Yamadaoka, Suita-shi, Osaka 565-0871, Japan
2Hanoi University of Science, 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam

Received 15 June 2014; Accepted 3 August 2014; Published 17 August 2014

Academic Editor: Eugenijus Ušpuras

Copyright © 2014 Thanh Mai Vu and Takanori Kitada. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Recently, the researches on fast neutron spectrum system utilized thorium fuel are widely conducted. However, the recent thorium cross section libraries are limited compared to uranium cross section libraries. The impact of thorium cross section uncertainty on thorium fuel utilized accelerator driven system (ADS) reactivity calculation is estimated in this study. The uncertainty of the caused by 232Th capture cross section of JENDL-4.0 is about 1.3%. The uncertainty of JENDL-4.0 is needed to be enhanced to provide more reliable results on reactivity calculation for the fast system. The impact of uncertainty of  232Th capture cross section of ENDF/B-VII is small (0.1%). Therefore, it will cause no significant impact of the thorium cross section library on the thorium utilized ADS design calculation.