Refine your search:     
Report No.
 - 
Search Results: Records 1-20 displayed on this page of 24

Presentation/Publication Type

Initialising ...

Refine

Journal/Book Title

Initialising ...

Meeting title

Initialising ...

First Author

Initialising ...

Keyword

Initialising ...

Language

Initialising ...

Publication Year

Initialising ...

Held year of conference

Initialising ...

Save select records

Journal Articles

Status of LBE study and experimental plan at JAEA

Saito, Shigeru; Wan, T.*; Okubo, Nariaki; Obayashi, Hironari; Watanabe, Nao; Ohdaira, Naoya*; Kinoshita, Hidetaka; Yamaki, Kenichi*; Kita, Satoshi*; Yoshimoto, Hidemitsu*; et al.

JPS Conference Proceedings (Internet), 33, p.011041_1 - 011041_6, 2021/03

An Accelerator Driven System (ADS) for waste transmutation investigated in JAEA employs lead-bismuth eutectic (LBE) as a neutron production target material and coolant. The neutrons are to be produced via the spallation with 1.5 GeV proton beam injection. As materials irradiation data are important for ADS development, JAEA plans to construct an irradiation facility with LBE neutron production target in J-PARC. There are many technical issues on LBE for practical use. In JAEA, various R&Ds are being carried out. Concerning corrosion study, conditioning operation and functional tests of OLLOCHI started. Oxygen concentration control technology has also developing. In the large scale LBE loop experiment, the operation for steady state and transient experiments was performed by using IMMORTAL. In the area of instrument, development of ultrasonic flow meter and freeze seal valve are progressing as a key technology for the LBE loop system. Investigation of behavior of impurities in LBE, which is important for design of the irradiation facility, started. In this paper, the status of the LBE studies and experimental plan will be presented.

Journal Articles

Characterization of mechanical strain induced by lead-bismuth eutectic (LBE) freezing in stainless steel cup

Ohdaira, Naoya*; Saito, Shigeru

Heliyon (Internet), 6(2), p.e03429_1 - e03429_8, 2020/02

 Times Cited Count:2 Percentile:57.94(Multidisciplinary Sciences)

Lead-bismuth eutectic (LBE) is a candidate liquid metal coolant for a fast reactor, especially accelerator driven system (ADS). Freeze sealed valve is a candidate design to be possible to add passive safety to the reactor. On the other hand, since LBE is known that it causes expansion after its solidification, quantitative evaluation of the stress to the pipe produced by the LBE expansion should be considered. Many researchers produced related data for the expansion, however, evaluations of the strain by LBE expansion was barely reported. Therefore, the strain measurement using a stainless steel cup and the stress evaluation was performed together with visual observation using an optical microscopy. The results indicated keeping above room temperature (RT) was a significantly effective way to reduce the strain to the pipe.

Journal Articles

Current Status of R&D and PIE Program for ADS Material Development in JAEA

Saito, Shigeru; Okubo, Nariaki; Obayashi, Hironari; Wan, T.; Sugawara, Takanori; Sasa, Toshinobu; Maekawa, Fujio

JPS Conference Proceedings (Internet), 28, p.071003_1 - 071003_6, 2020/02

Japan Atomic Energy Agency (JAEA) proposes transmutation of minor actinides (MA) by accelerator-driven systems (ADS). The ADS designed by JAEA is a system composed by LBE (Lead-Bismuth Eutectic) spallation target and a subcritical core. In the ADS, a beam window (BW) is exposed in complex field of heavy irradiation by proton/neutron and corrosion by flowing LBE. To develop ADS structural materials, it is of critical importance to investigate materials used in such environment. Thus, JAEA plans to construct a proton irradiation facility at the J-PARC to prepare an irradiation database for candidate ADS structural materials and to investigate irradiation effects in flowing LBE environment. In this paper, giving a whole scope of the JAEA ADS development, some results of experimental measurements and the specific program for planed R&D will be presented.

Journal Articles

Design of LBE spallation target for ADS Target Test Facility (TEF-T) in J-PARC

Saito, Shigeru; Obayashi, Hironari; Wan, T.; Okubo, Nariaki; Sugawara, Takanori; Endo, Shinya; Sasa, Toshinobu

Proceedings of 13th International Topical Meeting on Nuclear Applications of Accelerators (AccApp '17) (Internet), p.448 - 457, 2018/05

JAEA proposes transmutation of minor actinides by accelerator-driven systems (ADS). To obtain the data for ADS design, JAEA plans to construct the ADS Target Test Facility (TEF-T) within the framework of the J-PARC project. In TEF-T, a 250 kW proton-beam-driven LBE (Lead-Bismuth Eutectic) spallation target will be installed to prepare an irradiation database for candidate ADS structural materials. Design activities of the LBE target and target trolley have been progressed. Conceptual design of hot-cells for LBE target loop maintenance and PIE (Post Irradiation Examination) of irradiated samples have been finished. Two LBE loops were manufactured. One is a loop for TEF-T target mock-up and the other is that for collection of material corrosion characteristics in flowing LBE. Oxygen potential control systems for LBE flow have been also developed. Remote handling tests for the target exchange are underway. In this paper, current activities and studies to realize TEF-T will be presented.

Journal Articles

Study on the thermal-hydraulic of TEF-T LBE spallation target in JAEA

Wan, T.; Obayashi, Hironari; Sasa, Toshinobu

Proceedings of 17th International Topical Meeting on Nuclear Reactor Thermal Hydraulics (NURETH-17) (USB Flash Drive), 13 Pages, 2017/09

Journal Articles

Status of LBE corrosion test loop "OLLOCHI" and experiments at JAEA

Saito, Shigeru; Okubo, Nariaki; Obayashi, Hironari; Sasa, Toshinobu

NEA/CSNI/R(2017)2 (Internet), p.195 - 200, 2017/06

An ADS (Accelerator Driven System) for waste transmutation investigated in JAEA employs LBE (Lead-Bismuth Eutectic) as spallation target material and core coolant. To realize future ADS and an ADS target experimental facility (TEF-T) planned for construction in J-PARC, there are many technical issues on LBE. In particular, corrosion data of relevant materials like T91 (Mod. 9Cr-1Mo) and SS316L steels at 400-550$$^{circ}$$C under oxygen concentration controlled and flowing condition are indispensable. JAEA has designed and built new LBE corrosion test loop named OLLOCHI (Oxygen-controlled LBE LOop Corrosion tests in HIgh-temperature), to obtain the corrosion data at the higher temperature. The piping of high temperature sections was made by T91 and 2.25Cr-1Mo steel. The maximum temperature of these parts is 550$$^{circ}$$C. At low temperature sections, piping and components were made by SS316L and the maximum temperature is limited to 450$$^{circ}$$C. The status for the OLLOCHI as of March 2016 is that the some modification and the conditioning operation without LBE have already finished. The oxygen sensors and the oxygen control system will be installed soon. After that, the conditioning operation with LBE and oxygen control test will be started. And more, additional flow meters will be installed in each test section until next March. In parallel with these tests, thermal hydraulic analysis of the two test sections will be performed to identify the flow pattern in the specimen holders.

Journal Articles

Evaluation of globally- & locally-distributed erosion/cavitation damage by using laser ultrasonics

Wan, T.; Obayashi, Hironari; Sasa, Toshinobu

Kashika Joho Gakkai-Shi (USB Flash Drive), 36(Suppl.2), 8 Pages, 2016/10

Journal Articles

Numerical study on LBE flow behavior of the TEF-T LBE spallation target at JAEA

Wan, T.; Obayashi, Hironari; Sasa, Toshinobu

Proceedings of 11th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, Operation and Safety (NUTHOS-11) (USB Flash Drive), 12 Pages, 2016/10

Journal Articles

Measurement of LBE flow velocity profile by UDVP

Kikuchi, Kenji; Takeda, Yasushi*; Obayashi, Hiroo*; Tezuka, Masao*; Sato, Hiroshi

Journal of Nuclear Materials, 356(1-3), p.273 - 279, 2006/09

 Times Cited Count:8 Percentile:52.29(Materials Science, Multidisciplinary)

Measurements of LBE flow velocity profile were realized in the spallation target model by the ultrasonic Doppler velocity profile technique. Hitherto, it has not yet been done well because both of poor wetting property of LBE with stainless steels and poor performance of supersonic probes at high temperatures. Measurement was made for a return flow in the target model, which has coaxially arranged annular and tube channels. The electromagnetic pump generates LBE flow and the flow rate was measured by the electromagnetic flow meter. Measurement results show that re-circulation occurred near the surface of beam window, which might affect a heat transfer of target container.

JAEA Reports

A Differential albedo for a Monte Carlo criticality program KENO IV

Komuro, Yuichi; *; *

JAERI-M 93-246, 19 Pages, 1994/01

JAERI-M-93-246.pdf:0.68MB

no abstracts in English

Journal Articles

Phoswich detectors for flow monitoring of actinide solutions with simultaneous $$alpha$$ and $$beta$$($$gamma$$) counting

Usuda, Shigekazu; Abe, Hitoshi

Journal of Nuclear Science and Technology, 31(1), p.73 - 79, 1994/01

 Times Cited Count:15 Percentile:77.93(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Development of ZnS(Ag)/NE102A and ZnS(Ag)/stilbene phoswich detectors for simultaneous $$alpha$$ and $$beta$$($$gamma$$) counting

Usuda, Shigekazu

Journal of Nuclear Science and Technology, 29(9), p.927 - 929, 1992/09

no abstracts in English

JAEA Reports

JAEA Reports

JAEA Reports

Shielding Benchmark Problems,II

; ; *; *; *; Nakazawa, Masaharu*; *; *; *; ; et al.

JAERI-M 8686, 170 Pages, 1980/02

JAERI-M-8686.pdf:4.96MB

no abstracts in English

Journal Articles

The Termination processes of the autoxidations of benzene,toluene and ethylbenzene in the aqueous phase as studied by oxygen-18

Hotta, Hiroshi;

Bulletin of the Chemical Society of Japan, 41(7), p.1537 - 1539, 1968/00

 Times Cited Count:4

no abstracts in English

Journal Articles

Albedo component of $$gamma$$-ray streaming through straight cylindrical ducts

*; ;

Journal of Nuclear Science and Technology, 4(8), p.423 - 426, 1967/00

no abstracts in English

24 (Records 1-20 displayed on this page)