A fast reactor core online monitoring method and system

Abstract

The invention relates to an on-line monitoring method and system for a fast reactor core. The method firstly obtains the monitoring data of the reactor nuclear power and the inner position of the control rod by using the fast reactor external nuclear monitoring system and the control rod monitoring system; On the time step, the real-time reactor power and control rod position measurement data obtained in the previous step are used as the real-time input parameters of the core neutronics calculation program, and the steady-state core calculation is performed to obtain the neutron flux density and power in the reactor. , and then calculate the fuel consumption data of the components, and store the data in the database; extract the relevant data of the database for graphical display as needed. The invention can realize on-line supervision of the fast reactor core, provide detailed data support for the operation decision and fuel management of the fast reactor power plant, and improve the economic benefit and safety level of the power plant.

Description

technical field [0001] The invention belongs to the technical field of nuclear reactor design, and in particular relates to a fast reactor core online monitoring method and system. Background technique [0002] In order to ensure the safe use of nuclear fuel in the nuclear power plant reactor, online monitoring of certain parameters of the reactor and related parameters of the core measurement system should be carried out, and the operation trend of the relevant content should be tracked and analyzed to guide the operation and ensure that the operating parameters of the reactor conform to the design. Require. The current mainstream pressurized water reactor nuclear power plants are equipped with core supervision and management. [0003] Fast neutron reactors (fast reactors) are the main reactor type of the fourth-generation nuclear energy system, of which the highest level of technological maturity is the sodium-cooled fast reactor technology that uses liquid metal sodium a...

AI Technical Summary

Problems solved by technology

[0005] Fuel assembly and reactor system designs in fast reactors are quite different from thermal neutron reactors such as pressurized water reactors, for example: fuel assemblies usually use a tight grid and are usually designed with assembly outer casings, coolant operating temperatures are high, primary loops The integrated design of the system pool, etc. make it impossible to arrange detectors in the core fuel assembly in the fast reactor core to measure the neutron flux density or power of each fuel assembly

Operators cannot directly monitor or obtain parameters such as fuel assembly power, neutron flux density, power peak, and fuel assembly burnup through in-core detectors online

Images