Experimental incineration of low level radioactive samples

Yasuhiro Yumoto, Tadashi Hanafusa, Tomonori Nagamatsu, Shigeru Okada

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

To determine the volume reduction potential for incineration of radioactivity in low-level radioactive waste, an incineration experiment was performed at the Okayama University Radioisotope Center (OURIC). Solid low- level radioactive samples (LLRS) were prepared for 15 routinely used radionuclides (45Ca, 125I, 32P, 33P, 35S, 59Fe, 123I, 131I, 67Ga, 99mTc, 111In, 3H, 14C, 51Cr, and 201Tl). For each radionuclide, incinerated one at a time, the smoke duct radioisotope concentration was less than 1/10 of the regulatory concentration limit (The Japanese law concerning prevention of radiation hazard due to radioisotopes, etc.). The radionuclide-containing combustible and semi-combustible LLRS were incinerated at the AP-150R furnace erected at OURIC, and the distribution of radioactivity inside and outside the furnace was measured. In the experimental incineration of LLRS containing these 15 radionuclides, the fractions released (RF) in the gas phase of the final smoke duct ranged from 0.165 to 0.99. The radioactivities remaining in the incineration residue were 99mTc, 87%; 59Fe, 83.1%; 45Ca, 75%; 51Cr, 62.1%; 33P, 62.0%; 32P, 61.1%; 67Ga, 57.7%; 35S, 26.0%; 111In, 21.1%; 201Tl, 16.6%; 123I, 11.9%; 131I, 8.2%; 125I, 2.4%; 14C, 0.39%; 3H, 0.04%. In the incineration of LLRS containing 35S, the rate of adhesion to the furnace wall was lower at high-temperature (809°C) incineration than at low- temperature (376°C) incineration. For LLRS containing one of the three radioiodines, 123I, 125I, or 131I, no such difference was observed between low (372°C) and high (827°C) temperature incineration (RF varied from 0.82 to 0.94).

Original languageEnglish
JournalHealth Physics
Volume79
Issue number2 SUPPL.
Publication statusPublished - 2000
Externally publishedYes

Fingerprint

Incineration
incinerators
incineration
Radioisotopes
radionuclide
radioactive isotopes
radioactivity
Radioactivity
furnaces
smoke
Furnaces
Waste incineration
ducts
Smoke
Ducts
Temperature
radiation hazards
Radiation hazards
Radioactive Waste
radioactive wastes

Keywords

  • Incineration
  • Low-level
  • Operational topic
  • Radiation
  • Radioactive materials

ASJC Scopus subject areas

  • Environmental Science (miscellaneous)
  • Health, Toxicology and Mutagenesis
  • Toxicology
  • Physics and Astronomy (miscellaneous)
  • Public Health, Environmental and Occupational Health
  • Environmental Chemistry
  • Environmental Science(all)

Cite this

Yumoto, Y., Hanafusa, T., Nagamatsu, T., & Okada, S. (2000). Experimental incineration of low level radioactive samples. Health Physics, 79(2 SUPPL.).

Experimental incineration of low level radioactive samples. / Yumoto, Yasuhiro; Hanafusa, Tadashi; Nagamatsu, Tomonori; Okada, Shigeru.

In: Health Physics, Vol. 79, No. 2 SUPPL., 2000.

Research output: Contribution to journalArticle

Yumoto, Y, Hanafusa, T, Nagamatsu, T & Okada, S 2000, 'Experimental incineration of low level radioactive samples', Health Physics, vol. 79, no. 2 SUPPL..
Yumoto, Yasuhiro ; Hanafusa, Tadashi ; Nagamatsu, Tomonori ; Okada, Shigeru. / Experimental incineration of low level radioactive samples. In: Health Physics. 2000 ; Vol. 79, No. 2 SUPPL.
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