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Ho HQ, Honda Y, Hamamoto S, Ishii T, Takada S, Fujimoto N, Ishitsuka E. Promising Neutron Irradiation Applications at the High Temperature Engineering Test Reactor. JOURNAL OF NUCLEAR ENGINEERING AND RADIATION SCIENCE 2020. [DOI: 10.1115/1.4044529] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Abstract
The high temperature gas-cooled reactor (HTGR) has advantages for irradiation applications such as large space available for irradiation at reflector region and high thermal neutron spectrum with the graphite moderator. High temperature engineering test reactor (HTTR), a prismatic type of the HTGR, has been constructed to establish and upgrade the basic technologies for the HTGRs. Many irradiation regions are reserved in the HTTR to be served as a potential tool for an irradiation test reactor in order to promote innovative basic researches such as materials, fusion reactor technology, and radiation chemistry. This study shows the overview of some possible irradiation applications at the HTTRs including neutron transmutation doping silicon (NTD-Si) and Iodine-125 (125I) productions. The HTTR has possibility to produce about 40 tons of doped Si-particles per year for fabrication of spherical silicon solar cell. Besides, the HTTR could also produce about 1.8 × 105 GBq/yr of 125I isotope, comparing to 3.0 × 103 GBq of total 125I supplied in Japan in 2016.
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Affiliation(s)
- Hai Quan Ho
- Department of HTTR, Japan Atomic Energy Agency, Oarai Research and Development Institute, 4002, Narita-cho, Oarai-machi, Higashi-Ibaraki-gun, Ibaraki 311-1393, Japan
| | - Yuki Honda
- Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka-shi, Fukuoka 819-0395, Japan
| | - Shimpei Hamamoto
- Department of HTTR, Japan Atomic Energy Agency, Oarai Research and Development Institute, 4002, Narita-cho, Oarai-machi, Higashi-Ibaraki-gun, Ibaraki 311-1393, Japan
| | - Toshiaki Ishii
- Department of HTTR, Japan Atomic Energy Agency, Oarai Research and Development Institute, 4002, Narita-cho, Oarai-machi, Higashi-Ibaraki-gun, Ibaraki 311-1393, Japan
| | - Shoji Takada
- Department of HTTR, Japan Atomic Energy Agency, Oarai Research and Development Institute, 4002, Narita-cho, Oarai-machi, Higashi-Ibaraki-gun, Ibaraki 311-1393, Japan
| | - Nozomu Fujimoto
- Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka-shi, Fukuoka 819-0395, Japan
| | - Etsuo Ishitsuka
- Department of HTTR, Japan Atomic Energy Agency, Oarai Research and Development Institute, 4002, Narita-cho, Oarai-machi, Higashi-Ibaraki-gun, Ibaraki 311-1393, Japan
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Proposal of a neutron transmutation doping facility for n-type spherical silicon solar cell at high-temperature engineering test reactor. Appl Radiat Isot 2018; 135:12-18. [PMID: 29413825 DOI: 10.1016/j.apradiso.2018.01.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 12/04/2017] [Accepted: 01/09/2018] [Indexed: 11/20/2022]
Abstract
The p-type spherical silicon solar cell is a candidate for future solar energy with low fabrication cost, however, its conversion efficiency is only about 10%. The conversion efficiency of a silicon solar cell can be increased by using n-type silicon semiconductor as a substrate. This study proposed a new method of neutron transmutation doping silicon (NTD-Si) for producing the n-type spherical solar cell, in which the Si-particles are irradiated directly instead of the cylinder Si-ingot as in the conventional NTD-Si. By using a 'screw', an identical resistivity could be achieved for the Si-particles without a complicated procedure as in the NTD with Si-ingot. Also, the reactivity and neutron flux swing could be kept to a minimum because of the continuous irradiation of the Si-particles. A high temperature engineering test reactor (HTTR), which is located in Japan, was used as a reference reactor in this study. Neutronic calculations showed that the HTTR has a capability to produce about 40t/EFPY of 10Ωcm resistivity Si-particles for fabrication of the n-type spherical solar cell.
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