Development of synthetic code system for evaluating nuclear design accuracy; General, bumup and temperature-related characteristics

*; *; *

PNC TJ9124 97-003, 381 Pages, 1997/03

PNC-TJ9124-97-003.pdf:7.37MB

To develop nuclear design of LMFBR cores, they are important subjects of research and development to improve the accuracy in nuclear design of large LMFBR cores and to design highly efficient core more rationally. The adjusted nuclear cross-sections library had been made by being reflected the result of critical experiment of the JUPITER, etc. effectively as much as possible. And the distinct improvement of the accuracy in nuclear design of large LMFBR eores had been achieved. And the computer codes for analyzing sensitivity coefficients of burnup and temperature characteristics, adjusting cross-sections library and estimating the accuracy in nuclear design had been prepared to improve the prediction accuracy for burnup and temperature characteristics using many burnup and temperature data of "Joyo", etc. effectively. In the study, basic preparation of computer system had done by developing and improving the basic theoretical formula and confirming applicability of the system for large LMFBR. But, the system needed to be improved in the points of calculating model and efficiency of calculation to use for design work of the recycle reactor, Demonstration FBR, etc.. Therefore in this work, the total system for estimating the accuracy in nuclear design was prepared by improving present computer codes. The results are as follows: (1)The computer code to calculate sensitivity coefficients was made possible the three-dimensional calculation and relational system was improved. (2)The validity of the three-dimensional calculation was confirmed by comparing sensitivity coefficients which were calculated by three and two dimensional calculation model and by direct method. (3)The design to make usable system for estimating the accuracy was done by reviewing the whole of present system, for example, I/O data between computer codes, input method of geometric data, etc.. (4)The result of above investigation, unified program system using data base was adopted by ...