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The development of a rapid and highly sensitive monitoring system for radioxenon isotopes
- Source :
- Journal of environmental radioactivity.
- Publication Year :
- 2019
-
Abstract
- The rapid monitoring of radioactive gas is one of the most direct and sensitive methods used to characterize the leakage of nuclear installations, and its technical difficulty lies in achieving the goals of rapid and high sensitivity as much as possible. Several techniques, including adsorption at ultralow temperatures, impurity removal with hollow fiber membranes, and on-site measurements with low background, were used to develop a rapid and highly sensitive monitoring system for radioxenon isotope. This system could simultaneously separate xenon from air and measure radioxenon isotopes in a rapid and efficient way. The technical specifications of this system are as follows: the recovery of stable xenon is greater than 70%; and the MDCs of 133Xe and 135Xe are 4.3 Bq/m3 and 0.4 Bq/m3 within a 30 min cycle of sampling and testing, respectively. It is worth noting that the MDC of 133Xe here is only approximately 1/18000 to 1/800 of those obtained with other similar equipment, and the monitoring period of this system is one fortieth of that of noble gas equipment for OSI, for example, XESPM-III. As a result, the standard uncertainties are less than 16%. The system developed in this paper can be applied in leakage monitoring of nuclear facilities and can also provide instructive technical support for other tests, such as nuclear safety monitoring and evaluation.
- Subjects :
- Nuclear Weapons
010504 meteorology & atmospheric sciences
Isotope
Health, Toxicology and Mutagenesis
Nuclear engineering
chemistry.chemical_element
Monitoring system
General Medicine
010501 environmental sciences
Technical specifications
01 natural sciences
Pollution
Highly sensitive
Xenon
chemistry
Air Pollutants, Radioactive
Radiation Monitoring
Environmental Chemistry
Environmental science
Waste Management and Disposal
Radioactive gas
Xenon Radioisotopes
0105 earth and related environmental sciences
Safety monitoring
Leakage (electronics)
Subjects
Details
- ISSN :
- 18791700
- Database :
- OpenAIRE
- Journal :
- Journal of environmental radioactivity
- Accession number :
- edsair.doi.dedup.....9b4bf93502fc87ef21077e9e8f066580