COMPARISON OF PERSONAL DOSE EQUIVALENT Hp(10) IN 137CS RADIATION BETWEEN THE PRIMARY STANDARDS LABORATORIES OF JAPAN
D J Butler1, T Kurasawa2, M Litwin1
1Australian Radiation Protection and Nuclear Safety Agency (ARPANSA), Yallambie, Victoria 3085, Australia.
Radiation Protection Dosimetry
|October 7, 2017
Summary
Japan and Australia compared personal dose equivalent Hp(10) using BeO OSL dosemeters for 137Cs radiation. Results confirmed high precision, with a ratio of 1.006, validating passive dosimetry for standards comparisons.
Area of Science:
- Radiation Dosimetry
- Metrology
- Applied Physics
Background:
- Accurate measurement of personal dose equivalent (Hp(10)) is crucial for radiation protection.
- International comparisons of dosimetry standards ensure consistency and reliability.
- Passive Optically Stimulated Luminescence (OSL) dosemeters offer a viable method for such comparisons.
Purpose of the Study:
- To compare personal dose equivalent (Hp(10)) measurements for 137Cs radiation between Japan and Australia's primary standards laboratories.
- To evaluate the precision achievable with commercially available BeO OSL dosemeters.
- To verify the personal dose equivalent delivery methodologies employed by each standards laboratory.
Main Methods:
- Utilized 120 passive BeO OSL dosemeters (Dosimetrics GmbH).
- Delivered a 5 mSv dose of 137Cs radiation to 40 dosemeters in each participating country.
- Included 40 dosemeters as controls in each country for baseline assessment.
Main Results:
- The ratio of Hp(10) measurements between Japan and Australia was determined to be 1.006.
- A combined standard uncertainty of 3.2% was achieved for the comparison.
- Statistical uncertainty was as low as 0.32%, demonstrating high precision.
Conclusions:
- Passive BeO OSL dosemeters are suitable for high-precision dosimetry comparisons.
- The study confirmed the accuracy and consistency of personal dose equivalent delivery methods in both laboratories.
- The findings support the use of OSL dosimetry for inter-laboratory metrological comparisons.
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