A Method of Peak Stabilization and Power Measurement for 16n-Based Fuel Element Damage Monitoring

Abstract

The present invention discloses a 16 A method for peak stabilization and power measurement of N's fuel element damage monitoring, a bypass loop is set up in the primary loop system of the reactor, which will contain 16 The coolant of N is drawn from the primary circuit, and flows through the damage monitoring system through the pipeline, and then returns to the primary circuit system; when the valve of the bypass circuit is opened, the fuel element damage monitoring system is used to measure the amount of the coolant in the coolant. 16 N, the track address D corresponding to the measured peak position 1 , 16 The track address D corresponding to the N characteristic peak 2 , the peak offset ΔD=D 1 ‑D 2 , the peak position offset ΔD is used for the measurement correction of the stabilized peak or the detector; the reactor thermal power measurement system is used to measure the reactor power and 16 N is calibrated to form the power and 16 The corresponding relationship between N, after completing the calibration, by measuring 16 The N activity level gets the power of the reactor. The present invention reduces the coolant in the coolant by drawing out coolant in the main circuit. 16 N is used to stabilize the peak of the detection of fuel element damage, thereby eliminating the external radiation source, and it can also be used for the monitoring of reactor power.

Description

technical field [0001] The invention relates to a nuclear reactor fuel element damage monitoring technology, in particular to a 16 N. Peak stabilization and power determination methods for fuel element damage monitoring. Background technique [0002] The fuel element cladding is the first barrier to prevent the leakage of radioactive fission products. If the fuel element is damaged, the fission products in the fuel element will be released into the primary coolant. The reactor must be equipped with a fuel element damage monitoring system, so that the damage of the fuel element can be discovered in time, and measures can be taken when necessary, so as to ensure the safety of the reactor. [0003] In the damage monitoring of nuclear reactor fuel elements, the gain of the photomultiplier tube and the luminous efficiency of the crystal will change due to the influence of the ambient temperature on the nuclear detector, which will lead to the drift of the gamma energy spectrum o...

AI Technical Summary

Problems solved by technology

[0004] For the entire nuclear detection system, the use of radioactive reference sources will increase the radiation dose of the staff on the one hand, and on the other hand, there is a risk of radioactive source loss of control in all aspects of equipment production and transportation.

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