Tritium Release from Molten FLiNaBe under Low Flux Neutron Irradiation

Kumagai, Kohki; Tanaka, Teruya; Nagasaka, Tetsuya; Yagi, Juro; Watanabe, Takashi; Yamazaki, Gaku; Sato, F.; Tamaki, Shunsuke; Murata, Isao; Fukada, Satoshi; Katayama, Kazunari; Sagara, A.

doi:10.1585/pfr.14.1405044

Cited by 3 publications

(1 citation statement)

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“…Figure 3 shows the schematic of a tritium sampler system, which is composed of an Ar gas flow system, a closed stainless-steel container, an electric furnace, and water bubbling tubes [25][26][27]. The core sample weighing approximately 8 g in the closed, stainless-steel container was heated by an electric furnace at 400 • C flowing Ar gas.…”

Section: Tritium Measurementmentioning

confidence: 99%

Radioactivation Analysis of Concrete Wall in OKTAVIAN Facility

Tamaki

Panuntun

UEDOI

et al. 2022

Plasma and Fusion Research

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A deuterium-tritium (DT) neutron generator in Osaka University with a continuous intense neutron source emitting 3 × 10 12 fusion neutrons per second has been in operation since 1981. However, radioactivation for the parts of the accelerator body is a serious issue. Hence, in this study, we investigated the radioactivation of the intense irradiation room containing the continuous intense neutron source. Core samples of the concrete wall were collected at various positions in the irradiation room and the radionuclides in them were determined by performing gamma-ray spectrometry. Major long-lived radionuclides found were 54 Mn, 60 Co, and 152 Eu. The radioactivity of 152 Eu may possibly be consistent with the result obtained using the simulation code. The radioactivities of 54 Mn and 60 Co were minimal compared with that of 152 Eu. The tritium amount in the core sample was measured employing a tritium sampling system and a liquid scintillation detector and was found to be considerably larger than the amount estimated using the simulation code. Tritium diffused from the titanium-tritium target was attached to the wall surface. However, most of it did not penetrate the concrete wall. These results reveal the radioactivity issue of fusion neutron generator facilities and are expected to aid in the maintenance of their operation.

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Section: Tritium Measurementmentioning

confidence: 99%