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Technology assessment HTR: pt. 6: the radiological risks associated withthe thorium-fuelled High Temperature Reactor: a comparative risk evaluation
Gepubliceerd door: Publicatie datum:
ECN NUC 1996
ECN publicatienummer: Publicatie type:
ECN-C--96-046 ECN rapport
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This report presents the results of task B.3 of the 'TechnologyAssessment of the High Temperature Reactor' project. The objective of task B.3 was to evaluate the radiological risks to the general public associated with the sustainable HTGR cycle. Since the technologies to be used at several stages of this fuel cycle are still in the design phase and since a detailed specification of this fuel cycle has not yet been developed, the emphasis was on obtaining a global impression of the risk associated with a generic thorium-based HTGR fuel cycle. This impression was obtained by performing a comparative risk analysis on the basis of data given in the literature. As reference for the comparison a generic uranium fuel led LWR cycle was used. The structure of the report is as follows. In Chapter 2 the general methodology for assessing the radiological risks associated with nuclear installations is described. An overview is given of the measures commonly used to quantify these risks. In Chapter 3 an overview is given of the different stages of the reference uranium fuel led LWR cycle and the thorium fuel led HTGR cycle. In Chapter 4 a stage-by-stage analysis is given of the radiological risks associated with the two fuel cycles. Finally, in Chapter 5 an evaluation is made of the radiological risks associated with the LWR and HTGR cycles and with thorium and uranium fuels. In Appendix A the production and releases of "1"4C for LWR and HTGR fuel cycle facilities is considered in detail. 11 figs., 10 tabs., 10 refs.

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