Earticle

초록

영어

Background: Very fine radiation-induced aerosol particles are produced in intense radiation fields, such as high-intensity accelerator rooms and containment vessels such as those in the Fukushima Daiichi nuclear power plant (FDNPP). Size measurement of the aerosol particles is very important for understanding the behavior of radioactive aerosols released in the FDNPP accident and radiation safety in high-energy accelerators. Materials and Methods: A combined technique using wire screens and imaging plates was developed for size measurement of fine radioactive aerosol particles smaller than 100 nm in diameter. This technique was applied to the radiation field of a proton accelerator room, in which radioactive atoms produced in air during machine operation are incorporated into radiation- induced aerosol particles. The size of 11C-bearing aerosol particles was analyzed using the wire screen technique in distinction from other positron emitters in combination with a radioactive decay analysis. Results and Discussion: The size distribution for 11C-bearing aerosol particles was found to be ca. 70 μm in geometric mean diameter. The size was similar to that for 7Be- bearing particles obtained by a Ge detector measurement, and was slightly larger than the number-based size distribution measured with a scanning mobility particle sizer. Conclusion: The particle size measuring method using wire screens and imaging plates was successfully applied to the fine aerosol particles produced in an intense radiation field of a proton accelerator. This technique is applicable to size measurement of radioactive aerosol particles produced in the intense radiation fields of radiation facilities.

목차

ABSTRACT
 Introduction
 Materials and Methods
  1. Principle
  2. Wire screen device
  3. Air, irradiation and sampling of the irradiated air
  4. Measurement of size distributions of radioactive aerosol particles
 Results and Discussion
 Conclusion
 Acknowledgement
 References

키워드

저자

• Yuichi Oki [ Kyoto University Research Reactor Institute, Osaka ] Corresponding author
• Toru Tanaka [ Graduate School of Engineering, Kyoto University, Kyoto ]
• Naoyuki Osada [ Kyoto University Research Reactor Institute, Osaka ]
• Shinnosuke Nitta [ Graduate School of Engineering, Kyoto University, Kyoto ]
• Yoshihiro Ishi [ Kyoto University Research Reactor Institute, Osaka ]
• Tomonori Uesugi [ Kyoto University Research Reactor Institute, Osaka ]
• Yasutoshi Kuriyama [ Kyoto University Research Reactor Institute, Osaka ]
• Masaaki Sakamoto [ Kyoto University Research Reactor Institute, Osaka ]
• Tsutomu Ohtsuki [ Kyoto University Research Reactor Institute, Osaka ]

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