Radioactivation Analysis of Concrete Wall in OKTAVIAN Facility

被引：0

作者：

Tamaki S. ^{[3
]}

Panuntun F. ^{[1
]}

Uedoi K. ^{[3
]}

Haidong W. ^{[3
]}

Kusaka S. ^{[3
]}

Manabe Y. ^{[3
]}

Akiyama Y. ^{[3
]}

Tanaka T. ^{[2
]}

Sato F. ^{[3
]}

Murata I. ^{[3
]}

机构：

[1] National Nuclear Energy Agency of Indonesia, Jl. Kuningan Barat, Mampang Prapatan Jakarta

[2] National Institute for Fusion Science, Toki

[3] Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka

来源：

Plasma and Fusion Research | 2022年 / 17卷

关键词：

!sup]60[!/sup]Co; !sup]152[!/sup]Eu; fusion neutron; OKTAVIAN; radioactivation; radioactive waste; tritium;

D O I：

10.1585/PFR.17.1405001

中图分类号：

学科分类号：

摘要：

A deuterium-tritium (DT) neutron generator in Osaka University with a continuous intense neutron source emitting 3 x 1012 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 roomcontaining the continuous intense neutron source. Core samples of the concrete wall were collected at various positions in theirradiation roomand the radionuclides in them were determined byperforming gamma-ray spectrometry. Major long-lived radionuclides found were 54Mn, 60Co, and 152Eu. The radioactivity of 152Eu may possibly be consistent with the result obtained using the simulation code. The radioactivities of 54Mn and 60Co were minimal compared with that of 152Eu. 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. © 2022 The Japan Society of Plasma Science and Nuclear Fusion Research. All Rights Reserved.

引用

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