title: Environmental and personnel monitoring for uranium by delayed neutron counting.
abstract: At the Imperial College Reactor Centre we have developed a fully automated, large sample, high sensitivity delayed neutron counting system for routine analysis of environmental samples and personnel monitoring. Two-hundred fifty samples with a maximum volume of 30 ml can be analysed each working day. The detection limits (3 sigma) for uranium of natural isotopic abundance in our routine samples are typically 1 microgram/kg (0.05 Bq/kg) for dry samples and 1 microgram/l (0.05 Bq/l) for aqueous samples. Daily analysis of BNFL uranium standards, 'in house' uranium standards and weekly analysis of IAEA Soil-7 reference material are used to ensure constant system sensitivity and accuracy.
authors: Imperial College Reactor Centre, Berkshire, England, UK.
authors: R
authors: R
authors: Benzing
authors: S J
authors: SJ
authors: Parry
authors: N M
authors: NM
authors: Baghini
authors: J A
authors: JA
authors: Davies
mesh_terms: D006801:Humans; D009502:Neutrons; D010944:Plants / Q000737:chemistry*; D011834:Radiation Monitoring / Q000379:methods*; D012588:Scintillation Counting; D012987:Soil / Q000032:analysis*; D014501:Uranium / Q000032:analysis* / Q000652:urine; D014867:Water / Q000737:chemistry*
chemical_list: D012987:Soil; D014867:Water; D014501:Uranium