Design and Study of Critical Physical Test Scheme for Core with Hexagonal Jacketed Fuel

This paper proposes 11 core critical physical test schemes and performs corresponding calculations, demonstration and analysis, based on the critical physical test contents of the core with hexagonal jacketed fuel, in order to verify the calculation accuracy and reliability of the nuclear design calculation codes CELL and CPLEV2 for such core. The critical mass measurement scheme considers a fine adjustment of the core layout in the presence of a deviation between the calculation and actual results to ensure that the deviation between the effective multiplication factor in the case of full rod withdrawal and critical state is acceptable. The demonstration shows that the core loading scheme proposed in this paper meets the reliability test requirements for the core design code and can be used as the critical physical test scheme for the core with hexagonal jacketed fuel.