Real-time estimation method for reactor core accumulation amount based on Hualong-1

Abstract

The invention provides a Hualong-1-based reactor core accumulation amount real-time estimation method. The method comprises the following steps: 1) determining the total batch number NOB of fuel loaded by a Hualong-1 reactor core and the number NOA of fuel components of each batch in emergency of an accident; 2) determining the fuel power history of each batch of the reactor core; 3) estimating the reactor core accumulation amount of each batch of fuel accidents, 3.1) determining the nuclide generation rate, 3.2) estimating the train change product accumulation amount in the first irradiationperiod, 3.3) estimating the fission product accumulation amount in the subsequent irradiation or refueling period, and 4) estimating the reactor core accumulation amount, namely summing the fuel accumulation amounts of each batch.

Description

Technical field [0001] The invention belongs to the technical field of nuclear radiation safety, and in particular relates to a method for real-time estimation of core stock based on Hualong No.1. Background technique [0002] The emergency response experience after the Fukushima accident in Japan shows that the estimation of the reactor core stock volume and the accident release source term are important references for emergency decision-making. Establishing an easy-to-use, fast and accurate real-time estimation method for reactor core stock, and rapid estimation technology for improving the emergency core stock is an urgent requirement for the safe development of nuclear energy. [0003] The change in reactor core stock volume satisfies the Bateman equation. The general equation used to calculate the stock volume change is: [0004] [0005] Where N i : The concentration of isotope i in the fuel; Neutron flux (n cm -2 ·S -1 ); Microscopic fission cross section of heavy nuclei; ...

AI Technical Summary

Problems solved by technology

[0012] However, the two methods commonly used to estimate the current nuclear power plant reactor fuel’s radiation history in the reactor, shutdown decay, and batch refueling have insufficient consideration of the impact on the core inventory, and the calculated results deviate greatly from the real results.

Images