Optimization method for impeller hydraulic power of normal residual heat removal pump used for nuclear power plant

Abstract

The invention discloses an optimization method for hydraulic power parts (an impeller and a guide vane) of a normal residual heat removal pump used for a nuclear power plant. The hydraulic power of the impeller and the hydraulic power of the guide vane are designed preliminarily. The optimization method comprises the follow steps that the objective function is confirmed, the independent variable and the initial value are set, an orthogonal test scheme is made, the test is conducted, the objective function value is calculated, an optimal combination is sought, and whether the optimal combination meets the design requirements or not is inspected. According to the optimization method for hydraulic power of the impeller, firstly, the preliminary design is conducted through an empirical design; secondly, the further optimization is conducted on the basis of the design, the key factors which influence the objective function value are found out for setting up an orthogonal form, and three sets of impeller hydraulic power schemes and nine sets of guide vane combination hydraulic power schemes are designed; and finally, the objective function values of the nine sets of schemes are calculated through Fluent software, the result is analyzed, and the optimal combination of all the factors is picked out. According to the optimization method, the optimization speed is high, processing and manufacturing are not needed in the optimization stage, the period is short, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of nuclear power, and particularly relates to an impeller hydraulic optimization method for a normal waste heat discharge pump used in a nuclear power plant. Background technique [0002] CAP1400 normal waste heat pump for normal waste heat nuclear power plant (hereinafter referred to as CAP1400 waste pump) is an important equipment for the normal waste heat removal system (RNS) of CAP1400 nuclear power plant. It is located in the auxiliary building. (2) When starting the reactor, maintain the vacuum filling of the reactor coolant system for cooling; (3) When shutting down, if necessary, maintain the cooling of the spent fuel pool; (4) After a water loss accident, Absorb water from the charging pool or the replacement material tank in the containment to provide non-safe low-pressure injection; (5) After the containment is flooded, absorb water from the pit to recirculate the containment; (6) After the system...

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Problems solved by technology

Because there are many design parameters that affect the performance of the water pump, such as changing the parameters one by one and

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