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Masumoto, K.; Toyoda, Akihiro; Eda, Kazuyoshi; Izumi, Yuichi; Shibata, T.

doi:10.1023/a:1022511811356

Cited by 28 publications

(2 citation statements)

References 4 publications

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“…Previous studies have reported major radionuclides in certain particle accelerator facilities [11][12][13][14][15][16][17][18][19][20][21][22]. Major longlived radionuclides include 3 H (T), 22 152 Eu for fast neutrons.…”

Section: Introductionmentioning

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: Introductionmentioning

confidence: 99%

Radioactivation Analysis of Concrete Wall in OKTAVIAN Facility

Tamaki

Panuntun

UEDOI

et al. 2022

Plasma and Fusion Research

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“…The accumulation of radionuclides in the cyclotron facility walls raised the occupational exposure of workers. In addition, concrete wall activation might lead to an issue of radioactive waste management in the case of facility decommissioning [ 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Identification of Activation Isotopes in a CS-30 Cyclotron Vault

Abuhoza

Kassim

Alghamdi

et al. 2022

Sensors

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A CS-30 cyclotron has been in operation at King Faisal Specialist Hospital and Research Center (KFSHRC) since 1982. The CS-30 cyclotron has been used to produce medical radioisotopes for positron emission tomography (PET) and single-photon emission computed tomography (SPECT). Some of the nuclear reactions of radionuclide production are associated with the intense release of a wide range of fast neutrons. In this work, we investigated the radionuclides produced from neutron interactions with the cyclotron facility walls. Activation isotopes were determined by performing gamma ray spectrometry utilizing a high-purity germanium (HPGe) detector. The major radionuclides found were 152Eu, 154Eu, 134Cs, 65Zn and 60Co. Activation isotope accumulation had increased the dose rate inside the facility. The surface dose rates were measured at all of the surrounding walls. The maximum surface dose rate was found to be 1.2 µSv/h, which is much lower than the permissible occupational exposure of 15 µSv/h based daily 5 work hours.

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