Development of control rod guidance system,2; Development of system heat-up program

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Control rod operation guidance system (named Rod Guider) has been developed for the development of the automatic control rod system in experimental reactor Joyo from 1986. The first step of this development was completed. The four sphere's programs (Critical approach, Power ascent, Power adjustment, Power descent) had already been completed and the system heat-up program, remained last sphere's program, was developed continuously. And, Menu program was completed in order to unite five sphere's programs. During the 16th 100 MW duty cycle operation of Joyo, all programs (five sphere's program) were verified. Rod Guider gave adequate guidances for the operators. The results of these developments are following. (1)The program of system heat-up had a very good control. (2)New functions that give various plant operating guidances to the operators, excepting control rod operating guidance, were good. (3)All sphere's programs had a good contact to the menu program. (4)All sphere's programs (Critical approach, System heat-up, Power ascent, Power adjustment, Power descent) were completed.