title: Chemical dosimetry system for criticality accidents.
abstract: Ruder Bosković Institute (RBI) criticality dosimetry system consists of a chemical dosimetry system for measuring the total (neutron + gamma) dose, and a thermoluminescent (TL) dosimetry system for a separate determination of the gamma ray component. The use of the chemical dosemeter solution chlorobenzene-ethanol-trimethylpentane (CET) is based on the radiolytic formation of hydrochloric acid, which protonates a pH indicator, thymolsulphonphthalein. The high molar absorptivity of its red form at 552 nm is responsible for a high sensitivity of the system: doses in the range 0.2-15 Gy can be measured. The dosemeter has been designed as a glass ampoule filled with the CET solution and inserted into a pen-shaped plastic holder. For dose determinations, a newly constructed optoelectronic reader has been used. The RBI team took part in the International Intercomparison of Criticality Accident Dosimetry Systems at the SILENE Reactor, Valduc, June 2002, with the CET dosimetry system. For gamma ray dose determination TLD-700 TL detectors were used. The results obtained with CET dosemeter show very good agreement with the reference values.
authors.affiliation: Ruder Bosković Institute, Bijenicka 54, 10000 Zagreb, Croatia. saveta@rudjer.irb.hr
authors.forename: Saveta
authors.initials: S
authors.lastname: Miljanić
authors.forename: Boris
authors.initials: B
authors.lastname: Ilijas
mesh_terms: D001822:Body Burden; D005602:France; D005720:Gamma Rays; D006801:Humans; D009502:Neutrons; D009688:Nuclear Reactors; D011785:Quality Assurance, Health Care / Q000379:methods; D011829:Radiation Dosage; D011835:Radiation Protection / Q000295:instrumentation* / Q000379:methods / Q000592:standards; D018788:Radioactive Hazard Release; D011874:Radiometry / Q000295:instrumentation* / Q000379:methods / Q000592:standards; D012015:Reference Standards; D012062:Relative Biological Effectiveness; D015203:Reproducibility of Results; D018570:Risk Assessment / Q000379:methods* / Q000592:standards; D012307:Risk Factors; D017751:Safety Management / Q000379:methods; D012680:Sensitivity and Specificity; D012996:Solutions / Q000528:radiation effects; D013819:Thermoluminescent Dosimetry / Q000295:instrumentation / Q000379:methods / Q000592:standards
chemical_list: D012996:Solutions