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Report No.
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JUPITER-III Experiment Analyses

Shirakata, Keisho; Nakashima, Fumiaki; Sanda, Toshio*; not registered; Kawashima, Masatoshi*; not registered; not registered

The JUPITER-III program, which started in Jan. 1987, successfully ended after one year experimental period without any delay from the original schedule. In the study last year, we mainly proceeded the experimental planning checks and data arrangement. This time studies were done putting an emphasis on the analysis of the experimental data and following conlusions were derived from the studies. (1)Pre-analysis for ZPPR-18 was done attempting to check the experimental plan. The result was actually reflected to the experiments for ZPPR-18 successfully. (2)Analysis of criticality for ZPPR-17A, 17B and 17C was done. The C/E value 1.0003 for ZPPR-17A comes to be almost the same value as that for ZPPR-9, which is 0.9995. (3)$$beta$$$$_{eff}$$ evaluation was made for ZPPR-17A and ZPPR-17B. The value obtained in this study is higher by 3 % than that of ANL, which shows the same tendency as found in the JUPITER-I and II analyses. (4)Control rod calculations were done for ZPPR-17A and 17B. The following C/E values were obtained as a result. Plate type control rod : 0.871$$sim$$0.899. Pin type control rod : 0.883$$sim$$0.890. (5)Experimental data arrangement was done for large zone sodium void experiments and for sodium void drawer oscillating experiments. (6)Criticality analysis for ZPPR-12 was performed for the pin cores and the plate Cores. The C/E value for central and edge pin zone cores agreed with those for the plate cores as shown bellow. Central pin : 1.018. Edge pin : 1.019. Plate cores : 1.020 (7)An attempt was made for building a data base system for the JUPITER programs, using the ZPPR-17A experimental data as an test example. (8)Multidrawer effect was evaluated for ZPPR-17A. The effect on criticality is +0.17$$Delta$$k/k.

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