114件が見つかりました。

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第13回
福島廃炉に向けた燃料取出しのための技術開発
著者:
木下 博文,Hirofumi KINOSHITA,吉田 拓真,Takuma YOSHIDA,清水 禎人,Sadato SHIMIZU,米谷 豊,Yutaka KOMETANI
発刊日:
公開日:
キーワードタグ:
The decommissioning work at Fukushima Daiichi Nuclear Power Station needs to plan based on the information of investigation in the reactor building and the environmental status such as radiation dose rate. It is necessary to develop the remote operation technologies for investigation in the reactor building, radiation measurement, removal of spent fuel and fuel debris. Hitachi Group is developing the various remote operation technologies for removal of spent fuels from the spent fuel pool and fuel debr...
英字タイトル:
Development of technology for fuel removal of the Fukushima Decommissioning
第13回
福島第一原子力発電所使用済燃料プール貯蔵燃料及び燃料デブリ取出しに向けた取り組み
著者:
東倉 一郎,Ichiro TOKURA,篠崎 史人,Fumihito SHINOZAKI,鈴木 淳,Jun SUZUKI,浦西 敦義,Atsuyoshi URANISHI,大和 正樹,Masaki YAMATO,宮本 哲昌,Akimasa MIYAMOTO
発刊日:
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キーワードタグ:
Toshiba and TEPCO completed the removal of large debris from the spent fuel pool (SFP) in November 2015. The large debris had been an obstacle to start the fuel debris removal work and had been necessary to be removed quickly in terms of risk reduction. Continuously, Toshiba and TEPCO are preparing for removal of small debris and spent fuels. Also, Toshiba and IRID are investigating of PCV interior and working in research and development to determine construction methods considering amount, location an...
英字タイトル:
Effort aimed at removal of stored fuels from SFP and fuel debris inside PCV in Fukushima Daiichi Nuclear Power Station
第13回
福島第一原子力発電所冷却系配管の腐食評価に関する研究
著者:
佐藤 祥平,Shohei SATO,阿部 博志,Hiroshi ABE,渡邉 豊,Yutaka WATANABE
発刊日:
公開日:
キーワードタグ:
Corrosion rate of carbon steel SS400 was investigated in test solution (NaClaq, Cl-:200ppm) with a rotating cylinder electrode system. Polarization resistance measurement was used to determine variation of corrosion rate with time and specimens surface were observed after the measurements. Under aerated condition (dissolved oxygen: 7.3ppm), the corrosion rate increased with increasing rotating speed in low rotation speed ranges , but the corrosion rate decreased in high rotating speed ranges. The reas...
英字タイトル:
Evaluation of corrosion of cooling system piping of Fukushima Daiichi NPP
第13回
福島第一原発事故廃棄物の処理・処分技術開発
著者:
宮本 泰明,Yasuaki MIYAMOTO
発刊日:
公開日:
キーワードタグ:
The radioactive waste generated by the accident at the Fukushima Daiichi Nuclear Power Station (NPS) has characteristics which differ from those of waste from other normal operating stations in that: (1) It contains radionuclides deriving from accident-generated core fuels; (2) It may contain seawater ingredients resulting from the reactor-core cooldown immediately after the tsunamis and the accident; (3) It contains zeolite and sludge which have high radiation doses and the treatment and disposal of wh...
英字タイトル:
R&D on Treatment and Disposal of Radioactive Waste resulting from Accident at Fukushima Daiichi NPS
第13回
突合せ配管内壁からのレーザ溶接部分に対する EMAT 探傷の試み
著者:
古澤 彰憲,Akinori FURUSAWA,西村 昭彦,Akihiko NISHIMURA,鳥本 和弘,Kazuhiro TORIMOTO,竹仲 佑介,Yusuke TAKENAKA,西條 慎吾,Shingo SAIJO,外山 亮治,Ryoji TOYAMA
発刊日:
公開日:
The aim of this work presented here is to investigate the applicability of the guided wave testing to detect and evaluate the quality of laser beam butt welding line. First, four test pipes were prepared. All of the pipes were laser beam butt welded from inside of the pipe using laser torch. Two pipes of them were high-quality welded, the others were low-quality. Two different pipe-wall-thicknesses were in each quality. Secondly, Laser beam butt welding line detection and the quality evaluation experim...
英字タイトル:
EMAT-Guided Wave Approach for Detecting and Quality Evaluation of the Laser Beam Butt Welding Line on the Inner Surface of the Steel Pipe
第13回
耐放射線性を有する水中無線伝送システムの開発
著者:
武内 伴照,Tomoaki TAKEUCHI,大塚 紀彰,Noriaki OTSUKA,柴垣 太郎,Taro SHIBAGAKI,駒野目 裕久,Hirohisa KOMANOME,上野 俊二,Shunji UENO,土谷 邦彦,Kunihiko TSUCHIYA
発刊日:
公開日:
キーワードタグ:
As a part of the research and development of a monitoring system for NPPs situations during a severe accident, a radiation-resistant in-water wireless transmission system has been developed from fiscal 2012. From a consideration about the properties of in-water transmission methods, visible light was adopted as the transmission method of the system. From the results of gamma irradiation tests for optical devices, a 2-dimensional LED matrix and a camera were used as the light emitting and receiving device...
英字タイトル:
Development of radiation-resistant in-water wireless transmission system
第13回
耐放射線性カメラ用撮像素子のγ線照射効果
著者:
武内 伴照,Tomoaki TAKEUCHI,大塚 紀彰,Noriaki OTSUKA,土谷 邦彦,Kunihiko TSUCHIYA,田中 茂雄,Shigeo TANAKA,小沢 治,Osamu OZAWA,駒野目 裕久,Hirohisa KOMANOME,渡辺 恭志,Takashi WATANABE,上野 俊二,Shunji UENO
発刊日:
公開日:
キーワードタグ:
As an advanced surveillance systems in nuclear power plants, a development of a radiation-resistant camera for visual surveillance even under severe accidents. From the result of a gamma irradiation test for a ready-made hi-vision camera, it was revealed that the increase of dark current in the image sensor was the main cause of degradation of image quality by irradiation. To suppress the dark current, three different types of CMOS image sensors with field plate structure and three transistors, photoga...
英字タイトル:
Gamma Irradiation Effects of Image Sensor for Radiation-resistant Camera
第13回
自走式構内作業車に多用される蓄電池の電極部保護対策
著者:
金濱 勝宏,Katsuhiro KANEHAMA,米内口 和也,Kazuya YONAIGUCHI,小菅 英昭,Hideaki KOSUGE
発刊日:
公開日:
キーワードタグ:
Many number of small sized and self-propelled maintenance vehicles have been used in large sized factory yard such as nuclear facility, and there were installed simple setting type rechargeable batteries in part of them. We experienced to confirm a burnt trace at the electrode part of the battery after 11 years operation. So based upon this incident, we have been examining this cause and countermeasures in order to reduce the risk of safety operation. These activities are reflected to improve the suppo...
英字タイトル:
Electrode protection measures of the rechargeable batteries, which are installed in self-propelled maintenance vehicle of a factory yard
第13回
落雷残留磁気計測による雷撃ルート特定のための調査活動
著者:
佐藤 正史,Masashi SATO,河野 亮,Akira KAWANO,河野 瑞穂,Mizuho KONO,笹田 一郎,Ichirou SASADA,加呂 光,Hikaru KARO,佐藤 秀隆,Hidetaka SATO
発刊日:
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キーワードタグ:
In order to prevent the important facility from the influence of lightning, it is very effective to apply not only the adequate design of lightning impulse current resistance, but also additional countermeasures for lightning impulse current based upon the experience and information during the commission of each facilities. Especially when the facility was attacked by lightning , it is very important to get hold the roots of this lightning impulse current promptly. August 2nd of 2015, we experienced the l...
英字タイトル:
Activities to specify the root of lightning impulse current with detecting the remained magnetic field
第13回
表面き裂解析プログラム(SCANP)の特長とその適用性評価
著者:
永井 政貴,Masaki NAGAI,三浦 直樹,Naoki MIURA,白鳥 正樹,Masaki SHIRATORI
発刊日:
公開日:
Stress intensity factor is an important parameter to determine crack growth behavior due to fatigue or stress corrosion cracking (SCC). A number of stress intensity factor solutions have been proposed for various types of cracks. Shiratori has developed the surface crack analysis program, by which stress intensity factor for a crack under an arbitrary stress distribution can be calculated and the crack growth analysis can be performed. We have developed “Surface Crack ANalysis Program (SCANP)”, in whic...
英字タイトル:
Features of surface crack analysis program “SCANP” and its applicability evaluation
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