Abstract
Methods by which we can control flux tilts and maintain constant overall power of a high flux research reactor (NRU) using digital computer control are described. From coolant water temperature signals, the digital computers detect overall power deviation caused by flux tilts and control the reference setting to the analog neutron flux control system. First, according to sampled-data control theory and with linear approximation, a control program which is repeated regularly with fixed period is obtained mainly from time domain synthesis. Second, methods for computer time saving are studied, since the computers are time-shared amongst various tasks. One method is to change the constant period of control calculation to being dependent on system error. Actually an On-Off sampling scheme is used for this purpose. The other method is, in addition to the former, to change control calculation itself. A Time Optimal Control is applied to our control program. These control programs were designed, programmed, and t...
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