Evaluation of on-line control techniques for heater rods in the Semiscale Mod-3 system

TL;DRAbstract

An on-line control technique has been developed for use in controlling electrically heated rods in a manner that simulates the thermal behavior of nuclear rods. The computer program and associated hardware have been installed and tested in the Semiscale Mod-3 system. Data from a series of 200%, cold leg pipe break transient tests indicate that the technique is producing correct trends of core behavior and that it shows promise as a more correct and flexible control mechanism than preprogrammed power control. The tests have also provided a data base necessary for analytical efforts to verify and further improve controller response. Test results and improvements in control philosophies based on posttest investigations are quantitatively addressed.

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