To support interpretation of observed atmospheric 135Xe, 133Xe, 133mXe and 131mXe, a database of xenon radioisotope in the primary coolant of CANDU reactors has been established. This database is comprised
of 40000 records of high-quality xenon radioisotope analyses. Records from the database were retrieved by a specifically designed
data-mining module and subjected to further analysis. Results from the analysis were subsequently used to study isotopic ratios
of observed xenon radioisotopes in the CANDU reactor primary coolant. These studies provided novel and practical information
on the characterization of CANDU reactor xenon radioisotope releases, which can be used to discriminate between reactor effluence
and underground nuclear test releases.