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Development and testing of an active area neutron dosemeter
J M Brushwood1, J P D Gow, P A Beeley
1Nuclear Department/Flagship Training Ltd, HMS Sultan, Gosport, Hampshire, UK.
Radiation Protection Dosimetry
|September 9, 2004
Summary
This study introduces an active area neutron dosemeter (AAND) that improves neutron dose and radiation weighting factor measurements. The AAND combines traditional and novel detectors for enhanced accuracy in radiation monitoring.
Area of Science:
- Nuclear instrumentation
- Radiation detection and measurement
- Dosimetry
Background:
- Traditional neutron dosemeters face challenges in accurately determining ambient dose equivalent and radiation weighting factors.
- Existing methods may lack precision in complex neutron spectra.
Purpose of the Study:
- To design, develop, and test an active area neutron dosemeter (AAND).
- To improve the accuracy of measuring ambient dose equivalent (H*(10)) and mean radiation weighting factor.
- To validate the AAND's performance against established dosimetry principles.
Main Methods:
- The AAND retains a classic moderator and central detector setup.
- Augmented the design with integrated small thermal neutron detectors within the moderating body.
- Employed weighted linear superposition of detector outputs for dose and weighting factor calculation.
- Conducted experimental verifications of modeled energy responses and overall dosemeter performance.
Main Results:
- The AAND successfully determined both H*(10) and the mean radiation weighting factor.
- Achieved measurement accuracy better than +10% in D2O moderated 252Cf spectra.
- Experimental results validated the modeled detector energy responses.
Conclusions:
- The developed active area neutron dosemeter (AAND) demonstrates enhanced capabilities for neutron dosimetry.
- The AAND provides accurate measurements of ambient dose equivalent and radiation weighting factor.
- This technology offers a promising advancement in radiation monitoring applications.