A method for judging the source of fission products in the discharge pipeline of a nuclear power plant reactor

Abstract

The invention discloses a method for judging sources of fission products in nuclear power plant reactor letdown pipelines. The method comprises steps as follows: the reactor letdown pipelines are detected by a gamma ray detector in real time to obtain fission nuclide characteristic gamma ray spectrums in the reactor letdown pipelines; a signal amplification processing unit receives fission nuclide characteristic gamma ray spectrum signals detected by the gamma ray detector, amplifies and transmits the signals to a supervisory control computer; the supervisory control computer performs spectral analysis on the received fission nuclide characteristic gamma ray spectrums according to the pressure, the temperature and the flow velocity of reactor primary coolant circuit water as well as the reactor power, and determines nuclides in the reactor letdown pipelines according to characteristic gamma rays obtained through the spectral analysis; and the resources of the fission products in the reactor letdown pipelines are judged according to whether long-service-life nuclides with service lives longer than a first set value, short-service-life nuclides with service lives shorter than a second set value or non-volatile nuclides exist in the reactor letdown pipelines.

Description

technical field [0001] The invention relates to a method for judging the source of fission products in the discharge pipe of a nuclear power plant reactor, in particular, real-time detection can be carried out during the nuclear power plant reactor from start-up to normal operation. Background technique [0002] During the operation of nuclear power plant reactors, fission products are often found in its melting system. It has always been a very difficult problem to analyze and judge the source of these fission products. [0003] At present, the source of fission nuclides in the melt solution system of nuclear power plant reactors is mainly determined by measuring the activity of Xe-133 in chemical samples. This method is difficult to judge accurately. Contents of the invention [0004] The invention provides a method for judging the source of the fission product in the discharge pipe of the nuclear power plant reactor, which is used for quickly and accurately judging th...

AI Technical Summary

Problems solved by technology

This method is difficult to accurately judge

Images