National Air Absorbed Dose is a metric that describes the level of radiation in the air of a particular region or country. It is usually expressed as a unit area (usually per square meter). This value is the dose of radiation absorbed in the air per unit area over a given period of time.
Measurement:
The national absorbed dose in air can be used to measure the level of radiation in a particular area or country, and is usually monitored and recorded to ensure the radiation safety of the public and the environment. This monitoring is usually carried out by national or local government radiation monitoring agencies to ensure that people are not exposed to excessive levels of radiation.
Influencing factors:
1. Changes in radiation levels can be influenced by a variety of factors, including nuclear energy facilities, natural sources of radiation, medical radiation and other man-made factors. National monitoring of absorbed dose in air helps to ensure that these factors do not adversely affect public health and the environment, and helps to take the necessary radiation protection measures in a timely manner.
2. The national absorbed dose to air is usually expressed in units of radiation (e.g. Gray, Gray) or in units of radiation dose equivalent (e.g. Sievert, Sievert) in order to describe more accurately the effects of different types of radiation. Radiation levels in different regions and countries vary according to geographic location, population density, industrial activity, and other factors, so these monitoring data are important in the development of international and national radiation safety standards.
Monitoring methods for absorbed dose in air across the country:
I. Radioactive particle monitoring:
This is one of the most common methods of radiation monitoring and is used to measure radioactive particles in the air such as alpha particles, beta particles and gamma rays. Monitoring equipment includes various types of radioactive detectors such as scintillation detectors, semiconductor detectors and scintillator detectors. These devices capture and record the energy from radioactive particles.
II. Aerosol Monitoring:
This method is used to measure radioactive aerosols in the air, usually associated with nuclear accidents or emissions from nuclear facilities. Aerosol monitoring equipment includes aerosol samplers and radioactive aerosol detectors.
Third, gas monitoring:
Sometimes it is necessary to monitor radioactive gases in the air, such as tritium (tritium) and xenon (xenon). These gases are often associated with nuclear reactions or radioactive waste disposal. Gas monitoring equipment detects and measures the concentration of radionuclides in the gas.
IV. Environmental Monitoring Stations:
These stations are usually located in different geographical locations and are used to monitor airborne radiation levels to obtain data on a regional or national scale. Environmental monitoring stations are usually equipped with a variety of radiation detectors that can measure radiation levels on a regular basis and send the data to the relevant regulatory agencies.