Abstract
Through analyses of the bulk-shielding experiment on large type 316 stainless steel assemblies performed at FNS / JAERI, importance of the self-shielding effect on shielding designs of large-scale fusion devices is studied. When the self-shielding effect is not considered, DOT calculations largely underestimate resonance energy neutrons up to a factor of 2.5 at a depth of 0.91 m and overestimate gamma-ray production 35 % larger against MCNP calculations. DOT calculations with self-shielding corrected cross sections agree well with MCNP calculations for both neutron and gamma-ray production. Since DOT with self-shielding correction and MCNP agree with experiment within a few tens of percentage, validity of the used nuclear data library, JENDL-3, is confirmed. It is pointed out that the self-shielding correction is required in response functions for shielding design parameters, such as activation, displacement damage and neutron dose. In conclusion, it is inevitable for shielding designs of large-scale fusion devices to take the self-shielding correction.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
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.