hrvatski

Kemijski dozimetrijski sustav za radijacijske nesreće

Ruđer Bošković Institute (RBI) criticality dosimetry system consists of a chemical dosimetry system for measurement of 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 at 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 thermoluminescent detectors were used. The results obtained with CET dosemeter show very good agreement with the reference values.

Kemijski dozimetrijski sustav; radijacijske nesreće; TL dozimetri

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