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Spatial Control of a Large PHWR via Reduced Model

Dhananjay B. Talange, B. Bandyopadhyay, Akhilanand Pati Tiwari

Nuclear Technology

Volume 138 / Number 3 / June 2002 / Pages 217-237


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The paper presents the design of state feedback control for a large pressurized heavy water reactor (PHWR) by developing a reduced-order model for the same. The nonlinear mathematical model of the PHWR is linearized around an operating point corresponding to full-power operation of the reactor. The linear model has 14 inputs and outputs each and 56 states. Application of the reduction technique leads to a simplified model characterized by only 14 states. This 14th-order simplified model is used to design a linear quadratic regulator, and state feedback gains for the original 56th-order system are obtained without any significant difficulty. The transient performance of the closed-loop system is tested by simulation of the original nonlinear model of the PHWR.

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