A dynamic stick-cutting method using a power range detector and a signal as a signal source

Abstract

The invention discloses a dynamic rod carving method utilizing a power measuring range detector and taking a signal as a signal source. The dynamic rod carving method comprises the following steps: by using an existing signal terminal in a main control room of a power plant, recording a sum signal of current of all detectors of one channel of an out-reactor power measuring range which is continuously changed along the position of a control rod in a whole-group reactor core inserting process of a certain control rod group; inputting the signal into a reactivity instrument; and after revising static and dynamic revising factors, obtaining a measurement value of reactivity so as to finish rod carving. With the adoption of the dynamic rod carving method, an existing out-reactor nuclear measurement system of a nuclear power plant does not need to be subjected to any hardware modification and the rod carving can be finished without changing a power supply manner of the nuclear measurement system in a testing process.

Description

technical field [0001] The invention belongs to the field of nuclear reactor physical test methods, and in particular relates to a dynamic rod marking method using the sum signal of multi-section power range detectors with the same channel and multiple power ranges outside the nuclear reactor as a signal source. Background technique [0002] At present, the mainstream pressurized water reactor nuclear power plants carry out fuel replacement operations in batches. Generally, every one year or one and a half years, the most fully "burned" nuclear fuel in the nuclear reactor will be unloaded from the core, and a corresponding amount of new fuel will be released at the same time. Components are loaded into the reactor. Due to the differences in the physical properties of new and old fuels, nuclear power plants often need to entrust a qualified nuclear engineering design institute to design a new nuclear fuel loading scheme before each fuel replacement operation. [0003] After ...

AI Technical Summary

Problems solved by technology

This approach may be beneficial from the perspective of ensuring that the reactivity instrument and the external nuclear testing system share a physical ground, but switching the high-voltage power supply scheme of the nuclear instrument for each test is not only troublesome, but also brings additional risks. It may even trigger an unexpected shutdown of the reactor during the test

Images