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Method for rapidly calculating stock of short-life inert gas fission product reactor core disk

A technology of inert gas and fission products, applied in the field of reactor engineering, can solve problems such as shortage

Pending Publication Date: 2022-06-24
TSINGHUA UNIV
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Problems solved by technology

At present, the inventory calculation of short-lived inert gas fission products lacks a fast and simple calculation method that meets the requirements of engineering accuracy and meets the technical requirements of on-line monitoring of short-lived inert gas fission products in the reactor primary circuit and fuel element damage monitoring. Timely reflection of core status information

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  • Method for rapidly calculating stock of short-life inert gas fission product reactor core disk
  • Method for rapidly calculating stock of short-life inert gas fission product reactor core disk
  • Method for rapidly calculating stock of short-life inert gas fission product reactor core disk

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Embodiment Construction

[0052] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0053] The invention provides a method for quickly calculating the inventory of short-lived inert gas fission products in the core disk. The theory is to simplify the ignition consumption equations, establish an IPRFGN model, reactors, heavy water reactors, etc.) cores are described as point stacks with several key parameters. Its calculation process is as follows figure 1 and Figure 4 As shown, the method specifically includes the following calculation steps:

[0054] Step S1: Simplify the ignition consumption equations by the set simplification conditions, so as to obtain analytical solutions for the inventory of short-lived noble gas fission products in different decay chain modes.

[0055] The ignition consumption equation system is a mathematical model describing the fission, transfer, decay, activation and other nuclear reaction processes o...

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Abstract

The invention relates to a method for rapidly calculating the stock of a short-life inert gas fission product reactor core disk, and belongs to the technical field of reactor engineering.The method comprises the following steps that S1, an ignition consumption equation set is simplified by setting a simplification condition, and an analytical solution of the stock of the short-life inert gas fission product disk in different decay chain modes is obtained; s2, calculating reactor characteristic parameters by using an ignition consumption calculation program; s3, obtaining sub-parameters of the reactor through mathematical fitting according to the reactor characteristic parameters; s4, calculating reactor operation parameters according to the actual operation thermal power, the accumulated integral power and the fissible nuclide mass of the reactor; and S5, substituting the calculation results of the step S3 and the step S4 into the corresponding analytical solution in the step S1 to obtain the stock of the short-life inert gas fission product reactor core disk. The method provided by the invention can be used for rapidly calculating the short-life inert gas fission product disk stock of balanced cores or non-balanced cores of various types of nuclear fission reactors, and is accurate enough in engineering application.

Description

technical field [0001] The invention belongs to the technical field of reactor engineering, in particular to a method for rapidly calculating the inventory of short-lived inert gas fission products in a core disk. Background technique [0002] Nuclear fission nuclear power plants are produced by fissionable nuclides (mainly 235 The chain reaction of U) generates heat, which is further converted into the heat energy of the working medium in the primary or secondary circuit, and drives the steam turbine to rotate to generate power. The main radiation hazards of nuclear power plants come from the radioactivity generated by nuclear reactions. Therefore, it is particularly important to monitor and limit the release of radioactive substances in normal operation and accident situations of nuclear power plants. Source term analysis can not only determine the inventory of nuclides in various equipment of the reactor, but also be used for environmental monitoring, habitability assess...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/11G06F17/15G21C17/00
CPCG06F17/11G06F17/15G21C17/00Y02E30/30
Inventor 王彧谢锋曹建主李富童节娟
Owner TSINGHUA UNIV
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