Fuel element burnup Determination in mixed triga Core using reactor calculations

摘要

Calculations of fuel element burnup for realistic mixed core conditions in a 250-kW TRIGA Mark II reac- tor are presented. Two types of fuel elements are consid- ered: 70/100 entriched FLIP and 20/100 enriched standard fuel elements. Two calculation models are compared. The first is based on a one-dimensional two-group diffusion approximation (the TRIGAP computer code), and the sec- ond is based on a two-dimensional four-group diffusion equation the TRIGLAV computer code).