ASSESSMENT OF INTERNAL EXPOSURE FOR RADIATION WORKERS USING WHOLE BODY COUNTER
From Basic Safety Radiation Protection Regulations (BSRP 2010), the assessment of internal exposure to radiation workers due to the intake of any radioactive materials is required to ensure the compliance of radiation protection principles. This study aims to assess internal exposure for radiation workers from nuclear medicine departments and research reactor facility who might be exposed to the unsealed radioactive sources such as Tc-99m, I-131, F-18, Cs-137 and Co-60. A total of 13 radiation workers from two nuclear medicine centres and 29 radiation workers from research reactor facility were invited to perform the whole-body counting in Malaysian Nuclear Agency. Each worker was scanned using ORTEC Whole Body Counter (WBC), bed type for 3600 s counting time. The internal exposure for each radionuclide of interest then was evaluated based on the ICRP Publication 78, IAEA’s Safety Report Series No. 37 and BSRP 2010 in determining the committed effective dose. The results show that there is no internal exposure found for all monitored radiation workers. This may indicate that the radiation working procedures in these departments are well established and strictly followed by the staffs. However, a routine internal exposure monitoring should be carried out regularly to ensure the optimization of protection and safety for radiation workers in Malaysia.