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第11回
伊方発電所における竜巻防護対策について
著者:
池田 和豊,Kazutoyo IKEDA,高木 敏光,Toshimitsu TAKAGI,井上 晴久,Haruhisa INOUE,吉田 尚生,Hisao YOSHIDA,森内 雄大,Takehiro MORIUCHI
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1.はじめに 原子力規制委員会の定める設置許可基準規則第6条に 関連して、原子炉施設の供用期間中に極めてまれに発生 する突風・強風を引き起こす自然現象としての竜巻及び その随伴事象によって、原子設の安全性を損なうこ とのない設計であることを評価するため、「原子力発電所 の竜巻影響評イド」(以下、「ガイド」という。)等に 基づき、竜巻影響評価を実施している。[1,2]本評価のうち、伊方発電所3号機における竜巻防護対 策(実機適用事例)について紹介する。[3-6]2.竜巻影響評価対象施設の抽出 2.1 竜巻影......
英字タイトル:
Tornado missiles protections taken at the Ikata NPP of SEPCO.
第11回
六ヶ所再処理工場におけるワイドレーザー除染 及び遠隔操作ロボットの適用への取組み
著者:
野田 静枝,Shizue NODA,梅津 大輔,Daisuke UMETSU,盛田 貴博,Takahiro MORITA,菊池 英樹,Hideki KIKUCHI
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Various decontamination method are examined for reducing the generation volume of technological radioactive waste ,dec reasing radiation dose rate for personnel ,and so on during long life operation of Rokkasho Reprocessing Plant. We ha ve been developing so called “Wide LASER decontamination method”which combined with remote controlled robot to realize highly performance of decontamination, small influence to the materials, and less generation of the secondary waste. The authors introduce the characterist...
英字タイトル:
Approach to the decontamination with the wide laser and remote controlled robot in Rokkasho Reprocessing Plant
第11回
六ヶ所再処理工場における回転機器の設備診断 -振動解析による設備診断-
著者:
佐々木 一人,Ichito SASAKI,瀬川 佑太,Yuta SEGAWA,吉村 定志,Sadayuki YOSHIMURA,沢田 悠,Haruka SAWADA,須藤 重輝,Shigeki SUTOH
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The equipment diagnosis of Rokkasho reprocessing plant,was started from 2004 completion of the chemica l test.Target apparatus is rotation machine,such as a pump and a blower.The number is about 1700 sets. The pursuer has the qualification of ISO18436-2 and ISO18436-4. Moreover, it is working based on JEAG4221-2007. On the business of our company, the rotation machine is diagnosed using oscillating diagnosis and lubricating oil diagnosis. This report, the diagnosis method of a rotation machine and the Vibr...
英字タイトル:
Condition monitoring and diagnostics for rotation equipments in the Rokkasho reprocessing plant. Equipment diagnosis by using the oscillating diagnosis.
第11回
六ヶ所再処理工場における蓄電池点検の高度化への取組み
著者:
平内 彰良,ANira HIRANAI,佐々木 崇文,TaNahumi SASAKI,奥島 一洋,Kazuhiro OKUSHIMA,加藤 大樹,Daiju KATOU
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Many number of rechargable batteries are installed as an electrical power supply system to maintain the function of the RoNNasho Reprocessing Plant. These batteries have an important role to Neep the safety of the plant, so at the case of loss of normal and external alternating power supply, electrical circuits should be switched to battery powered system automatically and instantaneously. Exchange and replacement plan of these batteries are scheduled mainly based upon the capacity test data checNed by ba...
英字タイトル:
Approach to advanced diagnosis of rechargable batteries at RoNNasho reprocessing plant
第11回
六ヶ所再処理工場の設備の保全
著者:
尾形 圭司,Keiji OGATA,北条 隆志,Takashi HOJO
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The Rokkasho Reprocessing Plant is the first commercial reprocessing plant in Japan and has adopted the best technology from home and abroad. The Rokkasho Reprocessing Plant is composed of approximately 150,000 devices and buildings are located separately according to process. In this paper, we introduce the outline of reprocessing process and maintenance activities for the Rokassho Reprocessing Plant. ...
英字タイトル:
Equipment Maintenance of Rokkasho Reprocessing Plant
第11回
再処理施設分析廃液配管の腐食原因の調査
著者:
田中 直樹,Naoki TANAKA,諏訪 登志雄,Toshio SUWA,西田 直樹,Nai NISHIDA,久野 剛彦,Takehiko KUNO,伊波 慎一,Shinichi INAMI
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Corroded pore was found at stainless pipe for liquid waste solution fro m the analytical laboratory. In order to find out the cause of corrosio , analytical samples were prepared cutting from the pipe. Reagents con ined chloride, which had been used analytical laboratory more than te years before the date, were found to be the trigger of the localized c rosion. We checked up all the pipes, which have been wasted including chloride solutions, by phased array instrument. We report the investig ion of cause o...
英字タイトル:
Investigation into corrosion cause of the reprocessing facilities analysis waste fluid plumbing.
第11回
再処理施設分析廃液配管の腐食部の復旧
著者:
西田 直樹,Naoki NISHIDA,諏訪 登志雄,Toshio SUWA,田中 直樹,Naoki TANAKA,稲田 聡,Satoshi INADA,久野 剛彦,Takehiko KUNO
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Corroded pore was found at stainless pipe for liquid waste solution from the analytical laboratory. Part of the pipe was cut for preparing samples to investigate the cause of the corrosion. The same size of stainless pipe was welded to recover it, under the strict radiation control. The restoration work was done inside of the vinyl house, as it is called “greenhouse”, which was the small room completely separated with outside by vinyl sheet. All the works, cutting, decontamination, digging groove and w...
英字タイトル:
Restoration of the corrosion department of the reprocessing facilities analysis waste fluid plumbing.
第11回
再処理設備の民間規格化の現状～機器の設計/建設・維持管理～
著者:
西村 洋一,Yoichi NISHIMURA,大鷹 暢彰,Nobuaki OTAKA,久保田 浩,Hiroshi KUBOTA,高坂 充,Makoto KOUSAKA
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1. はじめに日本原燃株が青森県六ヶ所村で事業を進めている 再処理設備は、国内初の商業プラントである。再処 理設備は、原子力発電所から発生する使用済燃料を 再処理し、再び原子燃料として利用できるようにウ ランとプルトニウムを取り出すことを主な目的とし ている。このことから、再処理設備は核燃料サイク ルを確立するための要となっている。 この再処理設備の設計・建設は、法律に基づき指 定、認可を受け商業運転に向け着実に進歩を遂げて いる。再処理設備の操業後、安全で安定した運転を維持 し、操業後に計画されている改......
英字タイトル:
The Status of Standardization for Nuclear Fuels Reprocessing Facilities - Design / Construction and Fitness-for-Service of Equipments -
第11回
化学除染後のPt 付着処理による放射能再付着抑制方法の開発
著者:
細川 秀幸,Hideyuki HOSOKAWA,伊藤 剛,Tsuyoshi ITO,大橋 利正,Ohashi TOSHIMASA,長瀬 誠,Makoto NAGASE
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Noble metal chemical addition (NMCA) technology has been widely adopted for BWR plants in the US as a means to mitigate stress corrosion cracking (SCC). Dose rate of the reactor water recirculation system piping of some BWR plants that apply a combination of NMCA and zinc injection technology have gradually decreased. Chemical decontamination removes 60Co, but also the noble metal from the piping surfaces. Thus, effect of dose rate reduction by NMCA is decreased in the plant operating period after che...
英字タイトル:
Development of suppression method for deposition of radioactive nuclides after chemical decontamination by platinum deposition treatment
第11回
原子力安全とリスク認識
著者:
宮野 廣,Hiroshi MIYANO,出町 和之,Kazuyuki DEMACHI,荒井 滋喜,Shigeki ARAI
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In view of the severe consequences of TEPCO’s Fukushima Dai-ichi NPP accident, a new framework for the continuous enhancement of severe accident management (for beyond design basis accidents involving significant fuel damage) should be established for the operation of existing plants in Japan. Preparedness and response measures for addressing extreme natural disasters as large-scale earthquakes and tsunamis, and for other severe accident initiators should be formulated quickly, properly, and in good sequen...
英字タイトル:
Nuclear Safety Assessment of Nuclear Operating Plants after Fukushima No.1 NPS Tsunami Accident
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