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The method is suitable for quickly determining neutron proliferation leakage factor of uranium plutonium solution system

A technique for leak factor, determination method

Pending Publication Date: 2020-10-16
CHINA NUCLEAR POWER ENG CO LTD
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Problems solved by technology

However, for a given uranium-plutonium solution parameter, it takes a long time to calculate the neutron multiplication leakage factor by using the Monte Carlo program modeling, which is not suitable for use in the process of real-time neutron detection.

Method used

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  • The method is suitable for quickly determining neutron proliferation leakage factor of uranium plutonium solution system
  • The method is suitable for quickly determining neutron proliferation leakage factor of uranium plutonium solution system
  • The method is suitable for quickly determining neutron proliferation leakage factor of uranium plutonium solution system

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Embodiment Construction

[0033] The present invention will be described in detail below in conjunction with the accompanying drawings and examples.

[0034] For a specific uranium-plutonium solution system, that is, when the geometric conditions of the container are constant, the neutron breeding leakage factor is mainly affected by the uranium concentration, plutonium concentration, uranium isotope mass ratio, and plutonium isotope mass ratio. Therefore, the four-dimensional neutron proliferation leakage factor grid composed of four factors including uranium concentration, plutonium concentration, uranium isotope mass ratio and plutonium isotope mass ratio can be calculated in advance by Monte Carlo program. Through the method in the present invention, the neutron leakage multiplication factor M in the current state can be obtained based on the grid prepared in advance from the given uranium concentration, plutonium concentration, uranium isotope mass ratio and plutonium isotope mass ratio, without fu...

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Abstract

The invention relates to a quick determination method suitable for a neutron proliferation leakage factor of a uranium plutonium solution system. According to the method, a neutron proliferation leakage factor grid of a uranium plutonium solution system under different uranium concentrations, plutonium concentrations, uranium isotope mass ratios and plutonium isotope mass ratios is calculated based on a Monte Carlo program, and for the given uranium plutonium concentrations and uranium plutonium ratios, neutron proliferation leakage factors under corresponding conditions can be quickly calculated based on the grid. According to the technical scheme, for a given uranium plutonium solution system, the neutron proliferation leakage factor obtained through calculation is effective and accurate. The relative error of the calculated neutron leakage propagation factor is basically about 1%, and the method has very high precision.

Description

technical field [0001] The invention belongs to the monitoring and analysis technology of the fissile material content outside the reactor, and is suitable for the field of monitoring and estimating the plutonium concentration of the uranium-plutonium solution system, and specifically relates to a method for quickly determining the neutron proliferation leakage factor of the uranium-plutonium solution system. Background technique [0002] In the neutron detection process of the uranium-plutonium solution system, the total neutron count rate measured by the neutron detector can be calculated inversely to calculate the plutonium concentration in the solution system, using the "point model" equations derived by Boehnel, where The formula for calculating the total neutron count rate is: [0003] [0004] Among them, S represents the total neutron count rate, ε represents the detection efficiency, and v sf1 express 240 The first moment of the Pu spontaneous fission neutron m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/15
CPCG06F17/15
Inventor 赵子凡杨海峰于淼陈添易璇邵增袁媛
Owner CHINA NUCLEAR POWER ENG CO LTD
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