Abstract
Large nuclear reactors are prone to xenon oscillations in which despite the fact that the total power remains constant, the power distribution in the core may be nonuniform as well as it might experience unstable oscillations. Such oscillations affect the operation and control philosophy of core and could also drive issues related to safety. Thus, spatial control is required. In this chapter, several types of spatial controllers have been examined for Advanced Heavy Water Reactor (AHWR). Some of these designs are based on output feedback whereas the others are based on state feedback and both the conventional and modern control concepts have been investigated. The designs of controllers have been carried out using a 90th order model of AHWR, which is extremely stiff. As a result, straight forward application of these methods suffers with numerical ill-conditioning. Singular perturbation and time-scale methods have been applied whereby the design problem for the original high order system is decoupled into two or three subproblems, each of which is worked out independently. Nonlinear simulations have been carried out to get the transient responses of the system with all the controllers and their performances have been evaluated on the similar time scale.
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Munje, R., Patre, B., Tiwari, A. (2018). Comparison of Spatial Control Techniques. In: Investigation of Spatial Control Strategies with Application to Advanced Heavy Water Reactor. Energy Systems in Electrical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-10-3014-7_9
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DOI: https://doi.org/10.1007/978-981-10-3014-7_9
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