Abstract
At present there is a variety of experimental and calculation nuclear data which are rather entirely presented in the following evaluated nuclear data libraries: ENDF (USA), JEFF (Europe), JENDL (Japan), TENDL (Russian Federation), ROSFOND (Russian Federation). Libraries of nuclear data, used for neutron-physics calculations in programs: Scale (Origen-Arp), MCNP, WIMS, MCU, and others. Nevertheless all existing nuclear data bases, including evaluated ones, contain practically no information about threshold neutron reactions on 232Th nuclei; available values of outputs and cross-sections significantly differ by orders. The work shows necessity of nuclear constants corrections which are used in the calculations of grids and thorium storage systems. The results of numerical experiments lattices and storage systems with thorium.
Highlights
Accuracy of cross-sections evaluation of neutron interaction in fuel compositions is very important for reliable evaluation of uranium-thorium nuclear fuel cycle (NFC)
At present there is a variety of experimental and calculation nuclear data which are rather entirely presented in the following evaluated nuclear data libraries: ENDF (USA), JEFF (Europe), JENDL (Japan), TENDL
It should be noted that the libraries of such nuclear data are used for neutron-physical calculations in such precision programs as Scale (Origen-Arp), MCNP, WIMS, MCU and other
Summary
Accuracy of cross-sections evaluation of neutron interaction in fuel compositions is very important for reliable evaluation of uranium-thorium nuclear fuel cycle (NFC). All existing nuclear data bases, including evaluated ones, contain practically no information about threshold neutron reactions on 232Th nuclei; available values of outputs and crosssections significantly differ by orders. There is no sufficient data necessary for calculation of threshold neutron reactions on 232Th nuclei in the nuclear data base ENDF/B-VIII.0, which is recommended by the majority of computing engineers. Considering the importance of thorium data and concerning about the accuracy of 232Th cross section libraries, a series of experiments on thorium critical core with different neutron spectra has been implemented at Kyoto University Critical Assembly [2]. There is vital necessity have precise nuclear data for calculating resonant absorption parameters in fuel-rod arrays ad systems containing thorium.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: IOP Conference Series: Materials Science and Engineering
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
