Evaluation of Effective Sources in Uncertainty Measurements of Personal Dosimetry by a Harshaw TLD System

Shiraz University of Medical Sciences

T Orouji¹  SM Hosseini Pooya² 

[1] Iran Nuclear RegulatoryAuthority, Tehran, Iran;Iran Nuclear Regulatory Authority, Tehran, Iran

关键词: TLD;    Uncertainty;    Personal Dosimetry;    TLD Reader;    Dose;    Response;   

DOI  :  

学科分类：生物科学（综合）

来源: Shiraz University of Medical Sciences

【 摘 要 】

Background:The accurate results of the individual doses in personal dosimety which are reported by the service providers in personal dosimetry are very important. There are national / international criteria for acceptable dosimetry system performance. Objective:In this research, the sources of uncertainties are identified, measured and calculated in a personal dosimetry system by TLD. Method:These sources are included; inhomogeneity of TLDs sensitivity, variabil- ity of TLD readings due to limited sensitivity and background, energy dependence, directional dependence, non-linearity of the response, fading, dependent on ambient temperature / humidity and calibration errors, which may affect on the dose responses. Some parameters which influence on the above sources of uncertainty are studied for Harshaw TLD-100 cards dosimeters as well as the hot gas Harshaw 6600 TLD reader system. Results:The individual uncertainties of each sources was measured less than 6.7% in 68% confidence level. The total uncertainty was calculated 17.5% with 95% confi- dence level. Conclusion:The TLD-100 personal dosimeters as well as the Harshaw TLD-100 reader 6600 system show the total uncertainty value which is less than that of admis- sible value of 42% for personal dosimetry services.

【 授权许可】

CC BY