Research of Critical Reactivity Control Online Early Warning Technology in Nuclear Power Plant
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During the restart process of Pressurized Water Reactor (PWR) nuclear power plant, in order to let the reactor reach critical state safely and quickly, the critical reactivity control online early warning system can be designed. In this paper, the design scheme and implementation for critical reactivity control online early warning system are proposed, which can track and predict the nuclear power plant operation through two independent online simulation systems, and guide the operator to operate. The design scheme possesses various functions of reactivity online monitoring, calculate, predict, display and alarm; when the reactor does not reach the period limit or the reactivity does not reach the critical value, it can provide operator relative information and guide the operator to get back the critical state. This online early warning system has been realized and applied to operation, which possesses high availability.
KeywordsNuclear power plant Critical reactivity control Early warning system Online simulation
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