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; Kawai, Masashi; ; ; ; Okubo, Toshiyuki;
PNC TN9410 94-094, 69 Pages, 1994/03
As the final step of development of a control rod guide system (rod guider), it has been conducted to display information concerning the rod guider operation and the current plant conditions on a CRT in Japanese, to tell information for operators and to predict more accurately the stroke of each control rod to be driven at a reactor power adjustment operation since 1992, in oder to improve a function of man-machine interface of the rod guider. The development of the rod guider was completed with the following good results as expected. (1)The function of man-machine interface of the rod guider was improved to display information on a CRT in Japanese. (2)The voice guidance contributed to obtain higher operational reliability and to lower the load on the operators. (3)The rod guider provided the same function as operation manuals of Joyo because all operation procedures in the manuals were inputted into the rod guider. And the timely operation guides provided by the rod guider evabled non-skilled operators to control the reactor in the same manner as the experienced ones. (4)The difference of the predicted and actual rod stroke to be driven at the reactor power adjustment operation was reduced to less than 
0.2mm by both the existing inverse multiplication method and the experiences gained in the past five reactor power adjustment operations.
The Japan Society of Multiphase Flow*; Special Committee for Examination of Thermohydraulic Analysis Code based on Three-Fluid Model*
PNC TJ9565 92-001, 173 Pages, 1992/05
The purpose of the present study is to improve a numerical analysis method for multiphase flows based on the three-fluid model. The improvement will be conducted for the following three items; (1)modeling of the multiphase flow, (2)constitutive equations (3)numerical method. A systematic survey was carried out for the aforementioned three items. As a result, a reliable plan for the improvement was proposed. Experimental database for air-steam and air-water two-phase annular flow was also presented in this report, which will be useful for the future improvement of the constitutive equations. As for the numerical method, a method for improving the computational efficiency was proposed. It was confirmed that the CPU time decreases about 95% with the proposed method.
Morinaga, Masahiko*; Saito, Junichi*; *; *; *; Kano, Shigeki; Yoshida, Eiichi
PNC TY9623 92-001, 73 Pages, 1992/04
None
Kawaguchi, Koichi; Yamamoto, Kazuya; Segawa, Tomoomi; Ishii, Katsunori; Makino, Takayoshi; Iso, Hidetoshi
no journal, ,
Pellet sintering density data obtained from experiments changing the mixing ratio of simulated raw material powder and simulated dry recovery powder from 10:0 to 0:10 were analyzed. A method of predicting the pellet sintering density from particle size distribution of the dry recovery powder and the mixing ratio was examined.
