Using the dynamic model of the cogenerating nuclear gas turbine plant developed in Part I of this article, the dynamic behavior of this plant is analyzed and a control structure is designed. First it is determined how several design choices affect the system dynamics. Then the requirements and options for a control system design are investigated. A number of possible control valve positions in the flowsheet are tested with transients in order to make an argued choice. The model is subsequently used to determine the optimal working conditions for different heat and power demands, these are used as set-points for the control system. Then the interaction between manipulated and controlled variables is mapped and based on this information a choice for coupling them in decentralized feedback control loops is made. This control structure is then tuned and tested. It can be concluded that both heat and power demand can be followed with acceptable performance over a wide range.

Bardia, A., 1980, “Dynamics and Control Modeling of the Closed-Cycle Gas Turbine (GT-HTGR) Power Plant,” Proceedings of the Fourth Power Plant Dynamics, Control and Testing Symposium, E. M. Katz, ed., Mar., TN.
Yan, X. L., 1990, Dynamic Analysis and Control System Design for an Advanced Nuclear Gas Turbine Power Plant, Cambridge MA.
Op het Veld, R., and Buijtenen, J. P. van, 1998, “An Empirical Approach to the Preliminary Design of a Closed Cycle Gas Turbine,” ASME Paper No. 98-GT-393.
Nakaoka, T., et al., 1996, “Evaluation of Fatigue Strength of Plate-Fin Heat Exchanger Under Thermal Loading,” Proceedings of the ASME International Conference on Pressure Vessel Technology, Vol. 1, ASME, New York.
Carter, P., et al., 1996, “Failure Analysis and Life Prediction of a Large, Complex Plate Fin Heat Exchanger,” Eng. Fail. Anal.,3, No. 1.
Simon, W. A., Neylan, A. J., and Silady, F. A., 1993, “Design Features of the Gas Turbine Modular Helium Reactor (GT-MHR),” Technical Report GA-A21351, General Atomics, San Diego, CA.
Adams, R., 1994, Adams Atomic Engines, Inc., U.S. Patent number 5,309,492.
Stephanopoulos, G., 1984, Chemical Process Control: An Introduction to Theory and Practice, Prentice-Hall, Englewood Cliffs, NJ.
Maciejowski, J. M., 1989, Multivariable Feedback Design, Addison-Wesley, Wokingham, UK.
Zee, G. A. van, and Bosgra, O. H., 1979, “The Use of Realization Theory in the Robust Identification of Multivariable Systems,” Proceedings of the Fifth IFAC Symposium on Identification and Parameter Estimation, Darmstadt, Germany.
You do not currently have access to this content.