Bed-type과 Stand-type 상용 전신계수기(Whole Body Counter)의 성능 비교
Performance Comparison of Bed-type and Stand-type Commercial Whole Body Counter Made by Canberra for Internal Exposure Monitoring
0
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
Whole-Body counters have been used to evaluate the internal contamination of gamma emitting radionuclides. Among the whole-body counters used in domestic nuclear facilities, Fastscan made by CANBERRA contains 2 NaI(Tl) detectors and is generally used to monitor the primary internal exposure. It has the advantage of achieving MDA even with short time measurements. Accuscan is a bed type, and has good energy resolution because it is composed of HPGe detector. Since the Accuscan with better energy resolution than Fastscan has better able to identify radionuclides, it is used to monitor secondary internal exposure. Some nuclear facilities have only Fastscan. We analyzed statistically whether Fastscan is enough to ensure accuracy and precision comparing with Accuscan. To do this, we prepared a CRM created by the Korea Research Institute of Standards and Science. We also obtained the data of 6 Fastscans and 5 Accuscans in domestic nuclear facilities. As a result of the study, although Fastscan compared with Accuscan is not as accurate as the Accuscan, the precision is statistically same. However, accuracy of Fastscan is in compliance with international standards except low energy range. In terms of accuracy and precision except radionuclides emitting low energy, it is possible to measure radioactivity inside workers even in nuclear facilities where only Fastscan is used.
Abstract
Whole-Body counters have been used to evaluate the internal contamination of gamma emitting radionuclides. Among the whole-body counters used in domestic nuclear facilities, Fastscan made by CANBERRA contains 2 NaI(Tl) detectors and is generally used to monitor the primary internal exposure. It has the advantage of achieving MDA even with short time measurements. Accuscan is a bed type, and has good energy resolution because it is composed of HPGe detector. Since the Accuscan with better energy resolution than Fastscan has better able to identify radionuclides, it is used to monitor secondary internal exposure. Some nuclear facilities have only Fastscan. We analyzed statistically whether Fastscan is enough to ensure accuracy and precision comparing with Accuscan. To do this, we prepared a CRM created by the Korea Research Institute of Standards and Science. We also obtained the data of 6 Fastscans and 5 Accuscans in domestic nuclear facilities. As a result of the study, although Fastscan compared with Accuscan is not as accurate as the Accuscan, the precision is statistically same. However, accuracy of Fastscan is in compliance with international standards except low energy range. In terms of accuracy and precision except radionuclides emitting low energy, it is possible to measure radioactivity inside workers even in nuclear facilities where only Fastscan is used.
참고문헌 (17)
- Lee JK, "Korean Association for Radiation Application", pp.502~ (2016), Principles of Radiation Protection
- Minjung Pak, "An Intercomparison of Counting Effciency and the Performance of Two Whole-Body Counters According to the Type of Phantom", 방사선방어학회지, 41(3), pp.274~281 (2016), 테스트학회[DOI]
- Bento J, "Efficiency Correction Factors of An Accuscan Whole-Body Counter due to The Biodistibution of Cs-134, Cs-137and Co-60", Radiat. Prot. Dosimetry, 155(1), pp.16~24 (2013)
- An GS, "Developement of a Monte Carlo Simulation Code(CALEFF) for Calibrating Thyroid Internal Dose Measurement and Detection Efficiency Calculation", Journal of Radiological Science and Technology, 28(2), pp.117~122 (2005)
- Bronson FL, "Canberra Industries. The AccuscanⅡVertical Scanning Germanium Whole Body Counter", Health. Phys, 21(2), pp.233~244 (1987)
- 오주영, "NaI (Tl) 신틸레이션 카메라에서 계수율 오차에 따른 동적 영상 분석치 산출 오류에 관한 연구", 방사선기술과학, 36(4), pp.291~297 (2013), 대한방사선과학회
- A computerized, an anthropometrically designed, high throughput, whole body counter for the nuclear industry, "Bronson FL", 6~8 (1998)
- Kramer GH, "Effect of Mass, at a Fixed Height, on the counting Efficiency of a Bomab Phantom in Three Types of Whole Body Counter Modeled By MCNP5", Health. Phys, 95(2), pp.234~240 (2008)
- Calibration of the Accuscan Ⅱ In Vivo System for I-125 Thyroid Counting, "Idaho National Laboratory", 97~101, pp.INL (2011), EXT-11-22663
- "Calibration Phantom For In Vivo Whole Body Counter Specifications"[URL]
- Specifications for the Bottle Manikin Absorption Phantom, "American National Standards Institute", Health Physics Society, HPS, pp.1999, 8~13[DOI]
- Bento J, "Performance parameters of a whole body counter", Radiat. Meas, 2010(45), pp.147~252 (2010)
- The International Organizaiton for Standardization, "Radiation protection-Performance criteria for radiobioassay", ISO28218, 10~12 (2010)
- American National Standards Institute, "Health Physics Society", Performance Criteria for Radiobioassay, HPS N13.30, pp.1996, 23~29
- Kramer GH, "The Second International In-vivo Monitoring Intercomparison Program for Whole-Body Counting Facilities by Canadian and United States Agencies", Health Phys, 80(3), pp.214~224 (2001)
- Robert D., "How significant is a boxplot outlier", J. Stat. Educ, 19(2), pp.1~13 (2011)
- Kramer GH, "The 1993Intercomparison of The Measurement of In Vivo Radioactivity", Radiat. Prot. Dosimetry, 86(3), pp.197~205 (1999)