99件が見つかりました。

並び替え
・
第12回
福島第一原子力発電所の汚染水対策の概要
著者:
山下 理道,Norimichi YAMASHITA
発刊日:
公開日:
キーワードタグ:
In order to cool the melted fuel in reactors, circulating water system was installed. This system continually provides coolant inside the pressure vessel at Unit 1 to 3. After cooling fuel debris in RPVs or PCVs, injected water goes to turbine buildings. Cesium is then removed and this water flows to desalination plant with reverse osmosis membrane. After this step, purified water is recycled as coolant. Contaminated water of 300 m3 per day is created and stored in tanks. This contaminated water is tre...
英字タイトル:
Summary of contaminated water management at Fukushima Daiichi NPS
第12回
福島第一原子力発電所建屋内高所調査のためのロボット開発
著者:
山野辺 夏樹,Natsuki YAMANOBE,加藤 晋,Shin KATO,大山 英明,Eimei OYAMA,森川 泰,Yasushi MORIKAWA,横井 一仁,Kazuhito YOKOI
発刊日:
公開日:
キーワードタグ:
Abstract: National Institute of Advanced Industrial Science and Technology (AIST) and Honda R&D Co., Ltd. (Honda) have developed a robot to survey high and complex areas in the reactor buildings at Fukushima Daiichi nuclear power station. The high-access survey robot consists of a high-area accessible crawler type work platform and a survey arm installed on top of the platform, both of which can be remotely controlled using an intuitive graphical user interface. The robot has been deployed three times ...
英字タイトル:
High-Access Survey Robot for Fukushima Daiichi Nuclear Power Station
第12回
福島第一廃炉セッション 水処理技術 (２)塩分除去装置、サブドレン水浄化設備
著者:
三宅 俊介,Shunsuke MIYAKE,川嵜 透,Tooru KAWASAKI,野下 健司,Kenji NOSHITA,住谷 貴子,Takako SUMIYA,浅野 隆,Takashi ASANO
発刊日:
公開日:
キーワードタグ:
福島第一において東日本大震災以降発生した塩分を含む放射性汚染水を処理するための塩分除去装置が設置された。本設備で生成した淡水は原子炉の冷却に再利用され、設置以降３年以上に渡り高い稼働率を維持している。サブドレン水浄化設備は建屋周辺の井戸（サブドレン）から汲み上げた地下水を浄化するための設備である。本設備は2014 年に設置され、試運転においてトリチウムを除く放射性物質を検出限界未満に浄化できることが確認されている。 ...
英字タイトル:
Water treatment technology: (2) desalination system and sub-drain water purification system for Fukushima Daiichi
第12回
科学的リスクと社会リスク
著者:
宮野 廣,Hiroshi MITYANO
発刊日:
公開日:
キーワードタグ:
Radioactive material dispersion and radiation effects derived from nuclear fission reaction are fundamental risk on nuclear power generation. All parties involved must recognize and accept risk, assess risk, and endeavor earnestly to mitigate such risk. There is no absolute safety associated with any kind of a system (railways, aircrafts, and cars, etc.). Benefits generated through the use of a system will inevitably involve physical, mental, or financial risks. “The potentials of adverse consequences...
英字タイトル:
Scientific Risk and Social Risk
第12回
窒化・酸化・浸炭競合環境における ステンレス鋼製加熱管の減肉機構解明
著者:
山本 康平,Kohei YAMAMOTO,阿部 博志,Hiroshi ABE,渡邉 豊,Yutaka WATANABE,有岡 真平,Shinpei ARIOKA,小野 雅史,Masashi ONO
発刊日:
公開日:
キーワードタグ:
It was reported that nitride layer formed on SUS310S heating tubes in the reactor of melamine production plant showed severe spalling susceptibility. After replacement to SUS304heating tubes, spalling and thinning was suppressed. According to previous studies, a crystal structure of the nitrided layers of SUS310S and SUS304 heating tubes mainly consist of γ’ and α’, respectively. The reason why the SUS304 heating tube showed low spalling susceptibility was considered to be a smaller expansion rate of α...
英字タイトル:
Wastage mechanism of heating tubes made of austenitic stainless steels in a complex environment of nitriding, oxidizing, and carburizing
第12回
竜巻被害長さ方向の風速変化を考慮した竜巻ハザード評価法
著者:
平口 博丸,Hiromaru HIRAKUCHI,野原 大輔,Daisuke NOHARA,杉本 聡一郎,Soichiro SUGIMOTO,江口 譲,Yuzuru EGUCHI,服部 康男,Yasuo HATTORI
発刊日:
公開日:
キーワードタグ:
Abstract: Most of Japanese tornados have been reported near the coast line, where all of Japanese nuclear power plants are located. It is necessary for Japanese electric power companies to assess tornado risks on the plants according to a new regulation in 2013. The new regulatory guide exemplifies a tornado hazard model, which cannot consider the variation of tornado intensity along the path length and consequently produces conservative risk estimates. The guide also recommends the long narrow strip a...
英字タイトル:
Tornado hazard model with the variation effects of tornado intensity along the path length
第12回
米国における保全高度化の状況
著者:
藤井 有蔵,Yuzo FUJII
発刊日:
公開日:
キーワードタグ:
In USA, maintenance rule (10CFR50.65), issued in 1991, was risk informed performance base rule and required the utilities to observe whether the effectiveness of maintenance program was maintained continuously. Industry developed the guidance NUMARC 93-01in order to respond the requirements of maintenance rule efficiently. Deregulation of electric power at second half of 1990 forced the utilities to optimize the maintenance in view of not only safety but also economic performance. Industry develop Stan...
英字タイトル:
The Advancement of Maintenance for Nuclear Power Plant in USA
第12回
経済産業省委託事業「原子炉建屋内の遠隔除染技術の開発」吸引・ブラスト除の実機実証試験
著者:
鬼塚 博徳,Hironori ONITSUKA,矢野 雅洋,Masahiro YANO,下鍋 典昭,Noriaki SHIMONABE
発刊日:
公開日:
キーワードタグ:
In the lead-up to retrieving fuel debris from Units 1-3 at Fukushima Daiichi, various tasks are planned to take place inside the reactor buildings. In order to perform these tasks smoothly, improving the working environment is essential. An overall reduction in radiation levels is sought through a combination of decontamination, shielding, and removal of radioactive sources. Remotely controlled decontamination techniques required for the smooth implementation of surveys and repairs planned to take plac...
英字タイトル:
Development of Remote Decontamination Techniques for Reactor Building . Demonstration test of Suction and Blasting Decontamination
第12回
衝撃荷重を受ける構造物の最大応答解析法
著者:
奥田 幸彦,Yukihiko OKUDA,川幡 宏亮,Hiroaki KAWABATA,神保 雅一,Masakazu JIMBO
発刊日:
公開日:
キーワードタグ:
A simplified evaluation method for the nuclear power plant structures subjected to impulsive forces caused by the floating debris and tornado missiles is proposed. In this study, the maximum shock response displacement is obtained on the assumption that the impulse of the collision is constant. Then the maximum shock response displacement is used to evaluate structural damage by the classical elastic analysis. To verify the proposed method, impact analysis with FEM was performed. Comparisons of the ma...
英字タイトル:
An analysis method for maximum response of structures subjected to impulsive forces 仲村 岳 Gaku NAKAMURA Non member
第12回
補修の規格 －ニーズと活用－
著者:
堂﨑 浩二,Koji DOZAKI
発刊日:
公開日:
キーワードタグ:
Repair and Replacement Process (RRP) is one of the most important activities for maintenance of components or facilities in Nuclear Power Stations. Codes and Standards in RRP have been developed for a long time by some industrial organizations, such as Japan Power Engineering and Inspection Corporation (JAPEIC), Thermal and Nuclear Power Engineering Society (TENPES), Japan Nuclear Safety Institute (JANSI) and Japan Society of Mechanical Engineers (JSME). Though it seems to have some discussions for RR...
英字タイトル:
Codes and Standards in Repair and Replacement Process: Needs and Uses
Copyright © 2019 保全技術アーカイブ - サイトポリシー