Journal of Radiation Protection and Research

The Korean Association for Radiation Protection (대한방사선방어학회)
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Simulation of Counting Efficiencies of Portable NaI Detector for Rapid Screening of Internal Exposure in Radiation Emergencies

방사선비상시 내부피폭 신속 분류를 위한 휴대용 NaI 검출기의 계측효율 전산모사

  • Ha, Wi-Ho (National Radiation Emergency Medical Center, Korea Institute of Radiological and Medical Sciences) ;
  • Yoo, Jaeryong (National Radiation Emergency Medical Center, Korea Institute of Radiological and Medical Sciences) ;
  • Yoon, Seokwon (National Radiation Emergency Medical Center, Korea Institute of Radiological and Medical Sciences) ;
  • Pak, Min Jung (National Radiation Emergency Medical Center, Korea Institute of Radiological and Medical Sciences) ;
  • Kim, Jong Kyoung (Department of Nuclear Engineering, Hanyang University)
  • 하위호 (한국원자력의학원 국가방사선비상진료센터) ;
  • 유재룡 (한국원자력의학원 국가방사선비상진료센터) ;
  • 윤석원 (한국원자력의학원 국가방사선비상진료센터) ;
  • 박민정 (한국원자력의학원 국가방사선비상진료센터) ;
  • 김종경 (한양대학교 원자력공학과)
  • Received : 2015.08.28
  • Accepted : 2015.11.16
  • Published : 2015.12.31

Abstract

In case of radiation emergencies, radioactive materials released into environments can cause internal exposure of members of the public. Even though whole body counters are widely used for direct measurement of internally deposited radionuclides, those are not likely to be used at the field to rapidly screen internal exposure. In this study, we estimated the counting efficiencies of portable NaI detector for different size BOMAB phantoms using Monte Carlo transport code to apply handheld gamma spectrometers for rapid screening of internal exposure following radiological accidents. As a result of comparison for two counting geometries, counting efficiencies for sitting model were about 1.1 times higher than those for standing model. We found, however, that differences of counting efficiencies according to different size are higher than those according to counting geometry. Therefore, we concluded that when we assess internal exposure of small size people compared to the reference male, the body size should be considered to estimate more accurate radioactivity in the human body because counting efficiencies of 4-year old BOMAB phantom were about 2.4~3.1 times higher than those of reference male BOMAB phantom.

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Acknowledgement

Supported by : 한국원자력의학원

References

  1. International Atomic Energy Agency. Environmental consequences of the Chernobyl accident and their remediation: Twenty years of experience. IAEA STI/PUB/1239. 2006.
  2. Sugimoto A, Gilmour S, Tsubokura M, Nomura S, Kami M, Oikawa T, Kanazawa Y, Shibuya K. Assessment of the risk of medium-term internal contamination in Minamisoma city, Fukushima, Japan, after Fukushima Daiichi nuclear accident. Environ Health Persp. 2014;122:587-593.
  3. Matsuda N, Kumagai A, Ohtsuru A, Morita N, Miura M, Yoshida M, Kudo T, Takamura N, Yamashita S. Assessment of internal exposure doses in Fukushima by a whole body counter within one month after the nuclear power plant accident. Radiat Res. 2013;179(6):663-668. https://doi.org/10.1667/RR3232.1
  4. Etherington G, Rothkamm K, Shutt AL, Youngman MJ. Triage, monitoring and dose assessment for people exposed to ionising radiation following a malevolent act. Radiat Prot Dosim. 2011;144(1-4): 534-539. https://doi.org/10.1093/rpd/ncq420
  5. Manger RP, Hertel NE, Burgett EA, Ansari A. Using handheld plastic scintillator detectors to triage individuals exposed to a radiological dispersal device. Radiat Prot Dosim. 2012;150(1):101-108. https://doi.org/10.1093/rpd/ncr367
  6. Palmer RC, Hertel NE, Ansari A, Manger RP, Freibert EJ. Evaluation of internal contamination levels after a radiological dispersal device incident using portal monitors. Radiat Prot Dosim. 2012;151(2):237-251. https://doi.org/10.1093/rpd/ncs006
  7. Ferreira FTC, Bogaerts R, Bebacq AL, Mihailescu CL, Vanhavere F. Study of the counting efficiency of a WBC setup by using a computational 3D human body library in sitting position based on polygonal mesh surfaces. Health Phys. 2014;106(4): 484- 493. https://doi.org/10.1097/HP.0b013e3182a414ba
  8. Bolch WE, Hurtado JL, Lee C, Manger R, Burgett E, Hertel N, Dickerson W. Guidance on the use of handheld survey meters for radiological triage: Time- dependent detector count rates corresponding to 50, 250, and 500 mSv effective dose for adult males and adult females. Health Phys. 2012; 102(3):305-325. https://doi.org/10.1097/HP.0b013e3182351660
  9. American National Standard Institute. American National Standard - Specifications for the bottle manikin absorption phantom. ANSI/HPS N13.35. 1999.
  10. International Organization for Standardization. Radiation Protection - Performance criteria for radiobioassay. ISO 28218. 2010.
  11. American National Standard Institute. American National Standard - Performance criteria for radiobioassay. ANSI/HPS N13.30. 2011.

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