@article{oai:nagoya.repo.nii.ac.jp:00030897, author = {Wakamatsu, Susumu and Nishina, Kojiro and Hashimoto, Kengo and Fujishiro, Takahiro}, issue = {2}, journal = {Memoirs of the Faculty of Engineering, Nagoya University}, month = {Mar}, note = {To facilitate theoretical analyses of Kyoto University Critical Assembly (KUCA), reactor physics group constants were prepared. In this report we describe the procedures of the preparation, and verify the feasibility of the resulting constants through criticality calculations. For this purpose we first use computer code “UGMG-42” for fast-group constant production, and “THERMOS” for thermal group constant production. With these constants as inputs, criticality calculation is carried out by a two-dimensional code “EQUIPOISE-3”. The difference between the criticality calculation and experiment proves to be in the range 1.0~1.5%. In addition, comparison is made between the theoretical prediction and measured values of temperature coefficient, which is one of the fundamental characteristics of the Assembly. The calculation, which is performed with a one-dimensional code “EXPANDA-25-IMPORT,” reproduces successfully the experimental lattice-pitch dependence of this quantity.}, pages = {196--213}, title = {Reactor physics group constants for the C-core of the Kyoto University Critical Assembly}, volume = {31}, year = {1980} }