Tritium activity induced in the accelerator building and its correlation to radioactivity of gamma-nuclides

Wang, Q. B.; Masumoto, K.; Bessho, Kotaro; Matsumura, Hiroshi; Miura, Taichi; Shibata, T.

doi:10.1007/s10967-004-0480-0

Cited by 13 publications

(1 citation statement)

References 4 publications

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“…The samples were sliced every 2 cm from the surface, ground to a 100 μm mesh particle size using a ball mill, and then analyzed with a Ge detector after being packed into a U8-type plastic container. The sample amount was 70 g each, and the measurement time was 10,000 s. In addition, β-emitting nuclides ( 3 H and 14 C) in concrete sample were extracted by heating, collected the water vapor with a cold trap, and collected the CO 2 with monoethanolamine, then quantified by a liquid scintillation counter [25,26].…”

Section: Concrete Buildingmentioning

confidence: 99%

Investigation into activation of accelerators at various synchrotron radiation facilities in Japan

Yoshida

Matsumura

Masumoto

et al. 2021

Journal of Nuclear Science and Technology

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To establish systematic guidelines for accelerator decommissioning, a large-scale activation survey was conducted at representative synchrotron radiation facilities in Japan. The neutron flux during accelerator operation was measured with various dosimeters. A Monte Carlo simulation was conducted for some facilities to verify the special neutron distribution and their spectra. Beam loss points, reflected as high-dose-rate areas, were identified by a wholebeamline survey with a survey meter, and the generated radionuclides and their activity were determined with a lanthanum bromide (LaBr 3 ) scintillation spectrometer. In all facilities, the activation level was quite low. Whole-beamline tunnels made of concrete were not activated, and no radionuclides were detected except for natural nuclides. In addition, almost all beamline components were either not or minimally activated. Although the acceleration energy is very high for radiation synchrotron facilities, the generation of radioactive waste would be very low.

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Section: Concrete Buildingmentioning

confidence: 99%