title: Direct-immersion and water-extraction methods for measuring tritium contamination of concrete.
abstract: In the process of decommissioning a tritium-handling laboratory, direct-immersion and water-extraction methods for measuring tritium contamination in concrete were compared to a heating-cooling method. For this evaluation, concrete pieces chipped from contaminated concrete walls and floors were used. The direct-immersion method was about 2.5 times less sensitive at determining the level of contamination compared to the heating-cooling method. The water-extraction method was comparable with the heating-cooling method if the water extraction time was adequate.
authors.affiliation: National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan. kawano.takao@nifs.ac.jp
authors.forename: Takao
authors.initials: T
authors.lastname: Kawano
authors.forename: Makoto
authors.initials: M
authors.lastname: Kuroyanagi
authors.forename: Takeshi
authors.initials: T
authors.lastname: Tabei
mesh_terms: D003252:Construction Materials / Q000032:analysis*; D003666:Decontamination; D011850:Radioactive Waste / Q000032:analysis*; D014316:Tritium / Q000032:analysis*; D014867:Water / Q000737:chemistry*
chemical_list: D011850:Radioactive Waste; D014867:Water; D014316:Tritium