第17回
PWR1次冷却水環境下でのマグネタイト生成メカニズム等に 関する検討
著者:
井門 賢一,中川 和重,(四国電力),山本 松平,(四国総研),大鹿 浩功,(四国電力)
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Inadvertent withdrawal of a control rod cluster was observed during lifting of the upper core structure on the 15th outage of Ikata Unit3. The source of magnetite sludge, which is one of the causes of this event, was presumed to be the drive shaft, but there is little knowledge about the corrosion characteristics of the drive shaft material SUS410 in the PWR primary water. Therefore, we investigated the corrosion characteristics of SUS410 in simulated PWR primary water circumstance at the plant start-up sta...
英字タイトル:
Investigation on magnetite formation mechanism in PWR primary coolant system environment
第15回
コンクリート内埋設物の探査精度向上に関する電磁波レーダ法の信号処理技術の検討
著者:
岡部 克也,(四国総研)
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A large number of important structures such as electricity conduits are buried in reinforced concrete such as walls and floors of nuclear power plants, and it is necessary to explore the buried objects etc. when carrying out a concrete chipping work. Although the electromagnetic wave radar method is widely used for exploration of buried objects, detection may be difficult depending on the arrangement of buried objects. As a countermeasure against this problem, a method of improving the buried object explora...
英字タイトル:
Investigation of signal processing technology for electromagnetic wave radar concerning exploration accuracy improvement of concrete buried objects
第16回
衝撃吸収材を用いた竜巻防護対策の事例紹介
著者:
野口 新二,(四国総研),堀田 宏司,池田 和豊,(四国電力)
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Shock absorber has been designed for power plant equipment against to the impact load of a tornado missile. Impact energy could be absorbed by axial deformation on the double pipe of aluminum alloy.The compression test was performed by changing material, diameter and thickness of pipe. The obtained stress displacement cave was used for the optimal design of shock absorber for the heavy oil tank.The response acceleration on the heavy oil tank against to the impact load was evaluated by dynamic finite element...
英字タイトル:
Application of shock absorber to tornado protection on power plant equipment