First Workshop on Natural Radionuclides in Hydrology and Hydrogeology Luxembourg, 4-7 September 2002

RADON-IN-WATER SECONDARY STANDARD PREPARATION IN A WIDE ACTIVITY CONCENTRATION RANGE

D.J. Karangelos, N.P. Petropoulos, E.P. Hinis and S.E. Simopoulos
Nuclear Engineering Section
Mechanical Engineering Department
National Technical University of Athens

This work presents a method developed at the NES-NTUA to generate radon-in-water solutions of known concentration that can easily be applied in a laboratory with access to a Radon-in-air calibration facility. The method has been proven to be accurate enough for the solution produced to be usable as a secondary standard, traceable to within 10% of the calibration of the original Radon source. This fact, as well as other attractive features such as low running cost and ease of use, makes it appropriate for purposes such as quality control, intercalibration of instruments and laboratory intercomparison.