Technical preparations for atmospheric radioactivity monitoring

• Autorzy: Miyamoto Y. , Oda T. , Adachi T. , Noguchi H. , Nishimura H. , Usuda S.
• Konferencja: Proceedings of the Third International Meeting on Low-Level Air Radioactivity Monitoring, 25-29 September, 2000, Dabrowno near Nidzica, Poland
• Języki publikacji: EN

Abstrakty

EN

To evaluate the suitability of a location for a radionuclide monitoring station of the Comprehensive Nuclear-Test-Ban Treaty (CTBT) at Takasaki, Japan, the assessment was done in terms of the concentration of natural background radioactive nuclides in airborne dust and soil samples. The samples were taken four times at the proposed site and several points around the site, then their radioactivities were measured by gamma-ray spectrometry. For the airborne dust samples, only natural background radionuclides: 212Pb, 7Be and 214Pb were detected. The radioactivity concentrations of these radionuclides varied in four sampling periods but were almost the same as the previous measurements. For the soil samples, the concentration of an anthropogenic radionuclide, 137Cs, fluctuated among the different sampling points and periods, but the concentration of 40K was constant. These concentrations were 2 to 3 times lower than those of the soil taken at JAERI Tokai. Based on these results, the proposed site was evaluated and has been accepted by the CTBT Organization as a CTBT radionuclide monitoring station.

Słowa kluczowe

EN

airborne dust; background activity; CTBT; environmental radioactivity; nuclear explosion; radionuclide monitoring

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2001
• Tom: Vol. 46, nr 4
• Strony: 123--126
• Opis fizyczny: BIbliogr. 9 poz., rys.

Twórcy

autor

Miyamoto Y.

• Japan Atomic Energy Research Institute (JAERI), 2-4, Shirakata-shirane, Tokai, Ibaraki 319-1195, Japan, Tel.: [phone], Fax: [phone]

autor

Oda T.

• Japan Atomic Energy Research Institute (JAERI), 2-4, Shirakata-shirane, Tokai, Ibaraki 319-1195, Japan, Tel.: [phone], Fax: [phone]

autor

Adachi T.

• Japan Atomic Energy Research Institute (JAERI), 2-4, Shirakata-shirane, Tokai, Ibaraki 319-1195, Japan, Tel.: [phone], Fax: [phone]

autor

Noguchi H.

• Japan Atomic Energy Research Institute (JAERI), 2-4, Shirakata-shirane, Tokai, Ibaraki 319-1195, Japan, Tel.: [phone], Fax: [phone]

autor

Nishimura H.

• Japan Atomic Energy Research Institute (JAERI), 2-4, Shirakata-shirane, Tokai, Ibaraki 319-1195, Japan, Tel.: [phone], Fax: [phone]

autor

Usuda S.

• Japan Atomic Energy Research Institute (JAERI), 2-4, Shirakata-shirane, Tokai, Ibaraki 319-1195, Japan, Tel.: [phone], Fax: [phone]

Bibliografia

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• 2.Koch DM, Jacob DJ, Graustein WC (1996) Vertical transport of tropospheric aerosols as indicated by 7Be and 210Pb in a chemical tracer model. J Geophys Res 101;D13:18651–18666
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• 4. Miyamoto Y, Oda T, Noguchi H et al. (1999) A program to develop microanalytical techniques for atmospheric monitoring. In: 40th Annual Meeting of Institute of Nuclear Materials Management (INMM), Phoenix. CD-ROM media, Session B
• 5. Radioactivity survey data in Japan. Part 1. Environmental materials (1999) National Institute of Radiological Sciences, Chiba, Japan. NIRS-RSD-122, pp 24–27
• 6. Rehfeld S, Heimann M (1995) Three dimensional atmospheric transport simulation of the radioactive tracers 210Pb, 7Be, 10Be and 90Sr. J Geophys Res 100:26141–26161
• 7. United Nations (1996) Protocol to the Comprehensive Nuclear Test-Ban Treaty. Part I, Chapter C: Radionuclide monitoring
• 8. Winkler R, Aehlig K (1998) Temporal variation of thoron Decay product concentration in the atmosphere and comparison with radon decay product concentration. Radioat Environ Biophys 37:35–39
• 9. Yamagata N, Iwashima K (1967) Terrestrial background radiation in Japan. Health Phys 13:1145–1148