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

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.

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....

AI Technical Summary

Problems solved by technology

However, due to the unavoidable errors in microscopic experimental measurements, the establishment of nuclear physical measurement models takes a long time and there are manufacturing errors, the difficulty and cost of improving the accuracy of nuclear data through microscopic experimental measurements will continue to increase

Images