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The Radioactivity of 3H in Metals by a High Temperature Furnace and a Liquid Scintillation Counter

[+] Author Affiliations
Hee Reyoung Kim, Geun Sik Choi, Sang Yun Park, Chang Woo Lee, Moon Hee Han

Korea Atomic Energy Research Institute, Daejeon, Republic of Korea

Paper No. ICEM2010-40181, pp. 491-496; 6 pages
doi:10.1115/ICEM2010-40181
From:
  • ASME 2010 13th International Conference on Environmental Remediation and Radioactive Waste Management
  • ASME 2010 13th International Conference on Environmental Remediation and Radioactive Waste Management, Volume 1
  • Tsukuba, Japan, October 3–7, 2010
  • Conference Sponsors: Nuclear Engineering Division and Environmental Engineering Division
  • ISBN: 978-0-7918-5452-5 | eISBN: 978-0-7918-3888-4
  • Copyright © 2010 by ASME

abstract

The radioactivity of 3 H of the metal samples from the nuclear sites was analyzed by using a commercialized high temperature furnace and a Liquid Scintillation Counter (LSC). The 3 H activity of the sample was measured according to the duration of the high temperature combustion and the oxidation temperature. Basically, the recovery from the furnace was 90% for 3 H and the LSC had a quenching efficiency of approximately 30 %. HNO3 was used as a trapping solution for 3 H and the solution was cocktailed with a scintillator. The activity extracted from the sample was increased till the combustion time elapsed 60 minutes and the increasing rate was reduced continuously thereafter at 600 °C whereas 80% of radioactivity was extracted during the first 15 minutes at 900 °C. Also, the pretreatment for the metal sample, which included a high temperature combustion and trapping, had the time required of at least four hours at 900 °C. Finally, it was suggested that this high temperature combustion method could be applied to analyze the activity of the radioactive metal waste from the nuclear power plants.

Copyright © 2010 by ASME

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