Interlaboratory comparison on 137Cs activity concentration in fume dust

Abstract

A European comparison was conducted on measurement of 137 Cs activity in fume dust. Participants used high resolution gamma ray spectrometry. Efficiency calibration included Monte Carlo, numerical and experimental methods. Reference 137 Cs and 60 Co activity concentrations in the fume dust were determined. A new traceable activity standard of fume dust matrix is available to end-users. a b s t r a c t A comparison was conducted, between 11 European National Metrology Institutes and EC-JRC, on measurement of 137 Cs activity concentration in fume dust. As test material an activity standard produced from real contaminated fume dust was used. The standard material consisted of 13 cylindrical samples of compressed fume dust. The material contained 137 Cs and 60 Co of reference activity concentrations of (9.72 7 0.10) Bq/g and (0.450 70.018) Bq/g, respectively, for the reference date of 1 June 2013, determined using the comparison results. The organization and results of the intercomparison, as well as the process of obtaining reliable reference values are presented.

Evaluation of HPGe spectrometric devices in monitoring the level of radioactive contamination in metallurgical industry

“…In order to address this issue, a Joint Research Project (JRP), in the frame of the European Metrology Research Programme [7], called "IND04 MetroMetal" [6] and entitled "Ionising radiation metrology for metallurgical industry" was dedicated to envisage, study and provide a possible solution to the problem of standardisation and traceability. Fourteen European countries [8] with their National Metrology or Designated Institutes in the field of ionising radiations took part in the JRP and actively cooperated in carrying out the seven work packages that the programme comprises. Among the several topics covered by the project, all aimed at making the radioactive controls at steel mills more traceable, of particular importance were those concerning the development of measuring instruments optimised to be operated in a steel factory and to their testing at available steel mill facilities, respectively.…”