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Environmental radioactivity measurement intercomparisons in the UK
1Division of Radiation Science and Acoustics National Physical Laboratory, Teddington, Middlesex, UK.
International Journal of Radiation Applications and Instrumentation. Part A, Applied Radiation and Isotopes
|January 1, 1992
Summary
Two radioactivity measurement intercomparisons assessed laboratory performance. While generally satisfactory, issues with decay-scheme data and uncertainty statements highlight areas for improvement in radioactivity monitoring.
Area of Science:
- Nuclear Science and Measurement
- Environmental Monitoring
Background:
- Nationwide radioactivity measurement intercomparisons are crucial for assessing laboratory proficiency.
- Previous exercises revealed areas needing improvement in radionuclide analysis.
Purpose of the Study:
- To present results from two radioactivity measurement intercomparisons conducted in 1989 and 1990.
- To evaluate laboratory performance in measuring pure beta- and beta/gamma-emitting radionuclides.
- To assess improvements in laboratory procedures following initial findings.
Main Methods:
- Conducted two nationwide radioactivity measurement intercomparisons involving over fifty laboratories.
- Focused on a range of pure beta- and beta/gamma-emitting radionuclides.
- Reviewed results in the context of UK radioactivity monitoring and the National Measurement Accreditation Scheme (NAMAS).
Main Results:
- Initial exercise results were generally satisfactory, but most laboratories focused on gamma-ray measurements.
- Identified concerns included decay-scheme data, uncertainty statements, and cascade-summing effects.
- A follow-up exercise demonstrated improvements in laboratory procedures.
Conclusions:
- Laboratory performance in radioactivity measurements has been assessed through intercomparisons.
- Specific technical areas require ongoing attention to enhance accuracy and reliability.
- These exercises inform UK radioactivity monitoring and accreditation standards.