The Setting of RPN Power Range Calculation Parameters in Fuqing Nuclear Power Plant

Abstract

The function of RPN in Fuqing Nuclear Power Plant is to continuously monitor the reactor power, the power level and its distribution changes. The nuclear power signal measured by the four power range in RPN is sent to DCS to monitor the nuclear power, the power distribution, rod control, reactor protection and so on. It is thus of great significance for the security of Fuqing Nuclear Power Plant to ensure the accuracy of measuring results of the RPN power range. In Fuqing’s RPN power range, the nuclear power (Pr) and the setting parameters of the axial power deviation (ΔI) are experimented and calculated by using the software of ETALONG. However, the calculation processes, methods, as well as the parameters in the software ETALONG are inconsistent with the implementation logic of Pr and ΔI in the present RPN. Besides, the software ETALONG does not explain the Pr and ΔI calculation processes, methods and parameters, either. In this paper, through analyzing both the implementation logic of Pr and ΔI in the present RPN and that of in the software ETALONG, I get the definite methods of power range calculation parameters and the explicit setting formulas of parameters of RPN power range in Fuqing Nuclear Power Plant so as to ensure its accuracy of measuring results.