engleski

Techno-Economical Aspects of Ultra Long Working Cycles

The objective of the task reported in this paper was to evaluate the feasibility and costs of ultra-long operating cycle in existing pressurized water reactors while respecting current fuel burnup limits. Using FUMACS/FEEC 2001 code package, a core design for a single batch ultra-long (36 month) operating cycle has been developed. An additional core design based on current fuel enrichment limitations (5 % w/o U235) is presented. A zirconium di-boride integral fuel burnable absorbers are used to hold down initial reactivity and to control power peaking throughout the life of the core. The economical competitiveness of the ulta-long operating cycle compared to standard 18-month operating cycle has also been considered.

ultra long working cycles; FUMACS

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