JUPITER-III Experiment analyses

not registered; Sanda, Toshio*; not registered

JUPITER-III program (a joint study between PNC and DOE) was started in order to obtain informations required for designs of large LMFBR cores. Experimental plans, experimental data arrangement and their preliminary analyses were carried out, and the following results were obtained. (1) Final experimental plans were determined for the first axial heterogeneous core ZPPR-17A on Japanese proposed plans through the meeting between PNC and ANL. The experiments in the ZPPR-17A Assembly have completed as proposed. (2) The analysis models suitable for JUPITER-III were selected. Detailed analysis models for cell heterogeneity and so on were also discussed. C/E value of k for ZPPR-17A (AHC) is lower than that of ZPPR-9 (HOC) by about 0.1%. (3) Information for the ZPPR-12 and ZPPR-13D experiments, which were supplementally provided from ANL to JUPITER-III program, were investigated from the points of the design studies. No large discrepancies were found in the pin-plate biases in the first analysis of the criticality of the ZPPR-12 series. The magnitude of the discrepancy in the pin-plate bias was 0.1%k in the present analysis. Present results showed different tendency in the biases for the criticality from the results obtained in the international benchmark calculations for the CADENZA programs. (4) The results of JUPITER-I, II and FCA experiments and their analyses were assessed from the standpoints of the planning of JUPITER-III program and their analyses.