Development of the continuous monitoring of tritium water by mid-infrared laser spectroscopy (Contract research); FY2021 Nuclear Energy Science & Technology and Human Resource Development Project

Collaborative Laboratories for Advanced Decommissioning Science; National Institutes of Natural Sciences*

JAEA-Review 2022-059, 34 Pages, 2023/01

JAEA-Review-2022-059.pdf:1.58MB

The Collaborative Laboratories for Advanced Decommissioning Science (CLADS), Japan Atomic Energy Agency (JAEA), had been conducting the Nuclear Energy Science & Technology and Human Resource Development Project (hereafter referred to "the Project") in FY2021. The Project aims to contribute to solving problems in the nuclear energy field represented by the decommissioning of the Fukushima Daiichi Nuclear Power Station, Tokyo Electric Power Company Holdings, Inc. (TEPCO). For this purpose, intelligence was collected from all over the world, and basic research and human resource development were promoted by closely integrating/collaborating knowledge and experiences in various fields beyond the barrier of conventional organizations and research fields. The sponsor of the Project was moved from the Ministry of Education, Culture, Sports, Science and Technology to JAEA since the newly adopted proposals in FY2018. On this occasion, JAEA constructed a new research system where JAEA-academia collaboration is reinforced and medium-to-long term research/development and human resource development contributing to the decommissioning are stably and consecutively implemented. Among the adopted proposals in FY2021, this report summarizes the research results of the "Development of the continuous monitoring of tritium water by mid-infrared laser spectroscopy" conducted in FY2021. The present study aims to demonstrate the principle of short-time measurement of tritiated water at the "60 Bq/cc level" using a cavity ring-down measurement system with a mid-infrared laser. In order to achieve the above goal, (1) research on the cavity ring-down system and (2) evaluation of hydrogen isotope composition under environmental conditions and preparation of standard samples (subcontractor: Hirosaki University) were conducted this fiscal year. In (1), a mid-infrared cavity ring-down test was conducted. An optical bench (3 m 1.2 m) was set up in the laboratory, …

Advanced design of high-intensity beam transport line in J-PARC

Sakamoto, Shinichi; Meigo, Shinichiro; Fujimori, Hiroshi*; Harada, Masahide; Konno, Chikara; Kasugai, Yoshimi; Kai, Tetsuya; Miyake, Yasuhiro*; Ikeda, Yujiro

Nuclear Instruments and Methods in Physics Research A, 562(2), p.638 - 641, 2006/06

https://doi.org/10.1016/j.nima.2006.02.076

Materials and Life Science Facility of Japan Proton Accelerator Research Complex (J-PARC) is an experimental facility where neutron and muon beams are provided as powerful probes. They are generated with high-intensity proton beam supplied through a 3-GeV proton beam transport (3NBT) line. Its beam optics and components were designed to transport the proton beam of large emittance with extremely low loss rate. The 3NBT accommodates an intermediate target that causes large beam loss. The scheme of the cascade target system was carefully devised to overcome difficulties due to high radiation.

Radiation induced segregation and freely migrating defects

Iwase, Akihiro

Materia, 41(1), p.20 - 27, 2002/01

http://ci.nii.ac.jp/naid/10008836402

no abstracts in English

A Design stufy of hydrogen isotope separation system for ITER-FEAT

Iwai, Yasunori; Yamanishi, Toshihiko; Nishi, Masataka

JAERI-Tech 2001-027, 29 Pages, 2001/03

JAERI-Tech-2001-027.pdf:1.11MB

no abstracts in English

Analysis of the proton-induced reactions at 150MeV 24GeV by high energy nuclear reaction code JAM

Niita, Koji*; Nara, Yasushi; Takada, Hiroshi; Nakashima, Hiroshi; Chiba, Satoshi; Ikeda, Yujiro

JAERI-Tech 99-065, p.42 - 0, 1999/09

JAERI-Tech-99-065.pdf:1.83MB

no abstracts in English

Reduction of freely migrating defect concentrations by cascade remnants in Ni-Si alloys

Iwase, Akihiro; Rehn*; Baldo*; Funk*

Journal of Nuclear Materials, 244(2), p.147 - 152, 1997/00

https://doi.org/10.1016/S0022-3115(96)00734-9

no abstracts in English

Effect of damage cascades on the irradiation-induced amorphization in graphite

Abe, Hiroaki; Naramoto, Hiroshi; Iwase, Akihiro; Kinoshita, Chiken*

Nuclear Instruments and Methods in Physics Research B, 127-128, p.681 - 684, 1997/00

https://doi.org/10.1016/S0168-583X(96)01155-X

no abstracts in English

HETC-3STEP calculations of proton induced nuclide production cross sections at incident energies between 20 MeV and 5 GeV

Takada, Hiroshi; Yoshizawa, Nobuaki*; *

JAERI-Research 96-040, 91 Pages, 1996/08

JAERI-Research-96-040.pdf:2.2MB

no abstracts in English

Effect of cascade remnants on freely migrating defects in Cu-1%Au alloys

Iwase, Akihiro; L.E.Rehn*; P.M.Baldo*; L.Funk*

Ion-Solid Interactions for Materials Modefication and Processing (Mater. Res. Soc. Symp. Proc., Vol. 396), 0, p.179 - 184, 1996/00

no abstracts in English

Development of the code system ACCEL for accelerator based transmutation research

; Sasa, Toshinobu; Takada, Hiroshi; Takizuka, Takakazu

Proc. of 2nd Int. Conf. on Accelerator-Driven Transmutation Technologies and Applications, 1, p.668 - 674, 1996/00

no abstracts in English