Method, device and equipment for reducing kernel data correlation calculation uncertainty and medium

A data-related and deterministic technology, applied to equipment and media, to reduce nuclear data-related calculation uncertainty methods, and in the field of devices, it can solve problems such as manufacturing errors and long periods of nuclear physics measurement model establishment

CN114065126APending Publication Date: 2022-02-18NUCLEAR POWER INSTITUTE OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2022-02-18

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Abstract

The invention discloses a method, a device, equipment and a medium for reducing the uncertainty of nuclear data correlation calculation. The method comprises the following steps: carrying out nuclear data correlation sensitivity analysis on a target industrial reactor core and a plurality of critical physical experiments, and obtaining sensitivity coefficients of physical response parameters of all reactor cores to all nuclear data; forming a sensitivity vector of the physical response parameter of the target industrial reactor core to the nuclear data and a sensitivity vector of each critical physical experiment; constructing a relative covariance matrix according to all the nuclear data, and combining the sensitivity vector to obtain the nuclear data related uncertainty of the target industrial reactor core and the critical physical experiment; calculating a similarity coefficient between the target industrial reactor core and the critical physical experiment and a correlation factor between the experiments; and according to the similarity coefficient and the correlation factor, calculating the nuclear data correlation posteriori of the target reactor core and the nuclear data correlation uncertainty of the posteriori. According to the method, critical physical experiment data can be fully utilized, and a nuclear data adjustment process is avoided.
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Description

technical field

[0001] The invention relates to the technical field of nuclear reactor cores, in particular to a method, device, equipment and medium for reducing calculation uncertainty related to nuclear data. Background technique

[0002] With the continuous development of calculation methods and programs, the main source of uncertainty in core physical calculations in the future is the uncertainty of nuclear data. There are three ways to reduce the uncertainty of nuclear database and its impact: 1) Study the transfer of nuclear data uncertainty and quantify the uncertainty of reactor physics calculation. Although this method helps to reduce the conservative assumptions in core design analysis and operation analysis, it cannot essentially improve the accuracy of reactor physical calculation and reduce the calculation uncertainty. 2) Improve the microscopic measurement accuracy of nuclear data. This method can substantially reduce the uncertainty brought by nuclear data....

Examples

Embodiment 1

[0043] Such as figure 1 As shown, the present invention reduces nuclear data correlation calculation uncertainty method, and this method comprises:

[0044] Carry out sensitivity analysis related to the nuclear data of the target industrial core and several critical physical experiments, and obtain the sensitivity coefficients of the physical response parameters of all cores to all nuclear data; according to the sensitivity coefficients, obtain the Sensitivity vectors of physical response parameters to nuclear data, and sensitivity vectors of each critical physical experiment; the physical response parameters of the core include the effective proliferation factor or boron concentration or reaction rate of the core;

[0045] Construct a relative covariance matrix based on all nuclear data, and combine the sensitivity vector to obtain the nuclear data-related uncertainty of the target industrial core and critical physical experiments;

[0046] Calculate the similarity coefficie...

Embodiment 2

[0073] Such as image 3 As shown, the difference between this embodiment and Embodiment 1 is that this embodiment provides a device for reducing the calculation uncertainty related to nuclear data, and the device supports the method for reducing the calculation uncertainty related to nuclear data described in Embodiment 1. Devices include:

[0074] The sensitivity analysis unit is used to perform sensitivity analysis related to nuclear data on the target industrial core and several critical physical experiments, and obtain the sensitivity coefficients of the physical response parameters of all cores to all nuclear data; according to the sensitivity coefficient , to obtain the sensitivity vector of the physical response parameters of the target industrial core to the nuclear data, and the sensitivity vector of each critical physical experiment;

[0075] The a priori uncertainty calculation unit is used to construct a relative covariance matrix according to all nuclear data (ea...