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3 results on '"Kaito, T."'

1. Research and Development of Oxide Dispersion Strengthened Ferritic Steels for Sodium Cooled Fast Breeder Reactor Fuels.

Author

Inoue, M., Kaito, T., and Ohtsuka, S.

Abstract

Oxide dispersion strengthened (ODS) ferritic steels is eligible for fuel pin cladding tubes to endure heavy displacement damages to 250 dpa at high temperatures up to 973 K in commercialized sodium cooled fast breeder reactor cores. Japan Atomic Energy Agency has been developing ODS steels since 1987. For ODS steels, powder metallurgy process including mechanical alloying and hot consolidation produces highly stable and fine oxide dispersoids in matrix, and provides excellent dispersion hardening. Although cold rolling process in tube manufacturing tends to cause anisotropic grain growth, alpha to gamma phase transformation for the 9Cr-ODS steel and recrystallization for the 12Cr-ODS steel can modify grain morphology and improve creep rupture strength under internal pressure. Mechanical properties of the tubes have been extensively tested in air and stagnant sodium environments to establish Material Strength Standard for fuel pin mechanical design. Also, hundreds of specimens have been irradiated in the experimental fast reactor JOYO to investtigate irradiation effect on dimensional stability and mechanical properties. Pressurized resistance welding technology has been applied to join a tube and end plugs. Both 9Cr- and 12Cr-ODS steel tubes were assembled into fuel pins, and have been irradiated since 2003 under the collaborative program in the BOR-60 in Russia. [ABSTRACT FROM AUTHOR]

Published
2008
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3. The Prevalence of the Use of MIS Techniques in the Treatment of Adult Spinal Deformity (ASD) Amongst Members of the Scoliosis Research Society (SRS) in 2016.

Author

Anand N, Agrawal A, Burger EL, Ferrero E, Fogelson JL, Kaito T, LaGrone MO, Le Huec JC, Lee JH, Mudiyam R, Sasao Y, Sembrano JN, Trobisch PD, and Yang SH

Subjects
Aged, Female, Humans, Male, Surveys and Questionnaires, Minimally Invasive Surgical Procedures statistics & numerical data, Orthopedic Surgeons statistics & numerical data, Orthopedics organization & administration, Practice Patterns, Physicians' statistics & numerical data, Procedures and Techniques Utilization statistics & numerical data, Scoliosis surgery, Societies, Medical organization & administration, Spinal Fusion methods, Spinal Fusion statistics & numerical data
Abstract

Study Design: Electronic survey administered to Scoliosis Research Society members., Objective: To determine the prevalence of minimally invasive surgery (MIS) techniques for the treatment of adult spinal deformity., Summary of Background Data: There is a paucity of data available on the practice pattern, prevalence of minimally invasive spine surgery, and the preferred minimally invasive techniques in the treatment of adult spine deformity., Methods: An electronic nine-question survey regarding individual usage pattern of minimally invasive spine surgery techniques was administered in 2016 to the members of the Scoliosis Research Society. Determinants included complexity in condition of patient population, prevalence of use of minimally invasive techniques in the surgeon's practice, prevalence of use of a particular MIS technique, strategy elected during surgery, adoption of staging of procedures and timing between staging of procedures., Results: A total of 357 surgeons responded (61.3% response rate), and 154 (43.1%) of the respondents said that they use MIS as a part of their surgical treatment of adult spinal deformity. However, of these 154 respondents, 67 (43.5%) said that their MIS usage in deformity practice was between 1% and 20%. Only 11 (7.2%) said that they used MIS 81% to 100% of the time. The top MIS approaches that surgeons chose were MIS lateral lumbar interbody fusion 109 (70.59%) and MIS percutaneous screws 91 (58.8%)., Conclusions: The low rate of adoption of these techniques among the SRS members may be due to the false perception that there is not enough data to support that MIS techniques are better. This and the fact that a practitioner needs to be facile at different MIS techniques may be the true impediment to the adoption of MIS techniques in the treatment of ASD., Level of Evidence: Level IV., (Copyright © 2018 Scoliosis Research Society. Published by Elsevier Inc. All rights reserved.)

Published
2019
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