Earticle

초록

영어

Background: It is necessary to assess radiation dose to workers due to inhalation of airborne particulates containing naturally occurring radioactive materials (NORM) to ensure radiological safety required by the Natural Radiation Safety Management Act. The objective of this study is to develop an internal dose assessment procedure for workers at industries using raw materials containing natural radionuclides. Materials and Methods: The dose assessment procedure was developed based on harmonization, accuracy, and proportionality. The procedure includes determination of dose assessment necessity, preliminary dose estimation, airborne particulate sampling and characterization, and detailed assessment of radiation dose. Results and Discussion: The developed dose assessment procedure is as follows. Radioactivity concentration criteria to determine dose assessment necessity are 10 Bq∙g-1 for 40K and 1 Bq∙g-1 for the other natural radionuclides. The preliminary dose estimation is performed using annual limit on intake (ALI). The estimated doses are classified into 3 groups ( < 0.1 mSv, 0.1-0.3 mSv, and > 0.3 mSv). Air sampling methods are determined based on the dose estimates. Detailed dose assessment is performed using air sampling and particulate characterization. The final dose results are classified into 4 different levels ( < 0.1 mSv, 0.1-0.3 mSv, 0.3-1 mSv, and > 1 mSv). Proper radiation protection measures are suggested according to the dose level. The developed dose assessment procedure was applied for NORM industries in Korea, including coal combustion, phosphate processing, and monazite handing facilities. Conclusion: The developed procedure provides consistent dose assessment results and contributes to the establishment of optimization of radiological protection in NORM industries.

목차

ABSTRACT
 Introduction
 Materials and Methods
 Results and Discussion
  1. Determining the need for internal dose assessment
  2. Preliminary internal dose estimation
  3. Airborne particulate sampling and internal dose assessment
  4. Application of the internal dose assessment procedure
 Conclusion
 Acknowledgements
 References

키워드

저자

• Cheol Kyu Choi [ College of Engineering, Kyung Hee University, Yongin ]
• Yong Geon Kim [ College of Engineering, Kyung Hee University, Yongin ]
• Seung Woo Ji [ College of Engineering, Kyung Hee University, Yongin ]
• Boncheol Koo [ Korea Institute of Nuclear Safety, Daejeon, Korea ]
• Byung Uck Chang [ Korea Institute of Nuclear Safety, Daejeon, Korea ]
• Kwang Pyo Kim [ College of Engineering, Kyung Hee University, Yongin ] Corresponding author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  방사선방어학회지 [Journal of Radiation Protection and Research]

• 간기

  계간

• pISSN

  2508-1888

• 수록기간

  1976~2026

• 등재여부

  KCI 등재,SCOPUS

• 십진분류

  KDC 559 DDC 629