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Personal photon dosemeter trial--Devonport Royal Dockyard
1Devonport Royal Dockyard Ltd, Devonport Royal Dockyard, Plymouth PL1 4SG, UK.
Summary
A photon dosemeter trial assessed personal dosemeters at Devonport. Direct ion storage and Thermo electronic personal dosemeters are recommended for their accurate dose representation in low dose rate environments.
Area of Science:
- Radiation protection
- Dosimetry
- Occupational health
Background:
- Devonport's operational environment involves low dose rate exposures.
- Assessing personal dosemeters is crucial for accurate radiation monitoring.
Purpose of the Study:
- Evaluate the performance of various personal dosemeters in the Devonport low dose rate environment.
- Identify suitable dosemeters for current and new applications.
Main Methods:
- Conducted a photon dosemeter trial comparing multiple types of personal dosemeters.
- Assessed dosemeter suitability based on operational responses and dose rate environment.
Main Results:
- Panasonic TLD showed good response at medium/high gamma energies but under-responded at low energies.
- NRPB TLD and film badges were generally unsuitable due to consistent under-response.
- Harshaw TLD, RADOS RAD52, SAIC PD 2i, and Direct ion storage/Thermo electronic personal dosemeters demonstrated good dose representation.
- RADOS RAD80 and QFD failed to meet industry standards, though QFD is intrinsically safe.
Conclusions:
- Direct ion storage and Thermo electronic personal dosemeters are preferred due to inherent characteristics and system integration.
- Some dosemeters require adjustments for operational (60)Co environments.
- Specific dosemeters are suitable for specialized intrinsically safe requirements.