Effect of Activation Cross Section Uncertainties on the Radiological Assessment of the MFE/DEMO First Wall
A Monte Carlo procedure has been applied in this work in order to address the impact of activation cross sections (XS) uncertainties on contact dose rate and decay heat calculations for the outboard first wall (FW) of a magnetic fusion energy (MFE) demonstration (DEMO) reactor. The XSs inducing the major uncertainty in the prediction of activation related quantities have been identified. Results have shown that for times corresponding to maintenance activities the uncertainties effect is insignificant since the dominant XSs involved in these calculations are based on accurate experimental data evaluations. However, for times corresponding to waste management/recycling activities, the errors induced by the XSs uncertainties, which in this case are evaluated using systematic models, must be considered. It has been found that two particular isotopes, {sup 60}Co and {sup 94}Nb, are key contributors to the global DEMO FW activation uncertainty results. In these cases, the benefit from further improvements in the accuracy of the critical reaction XSs is discussed.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 15016587
- Report Number(s):
- UCRL-CONF-212181; TRN: US0502627
- Resource Relation:
- Journal Volume: 81; Journal Issue: 8-14; Conference: Presented at: ISFNT-7, Tokyo (JP), 05/23/2005--05/27/2005; Other Information: PBD: 10 May 2005
- Country of Publication:
- United States
- Language:
- English
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