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Columbia Generating Station is a nuclear commercial energy facility located north of Richland, Washington. It is owned and operated by Energy Northwest, a Washington state, not-for-profit joint operating agency. Licensed by the Nuclear Regulatory Commission in 1983, Columbia first produced electricity in May 1984, and entered commercial operation in December 1984. Columbia produces 1,190 megawatts of electricity, which is about 10 percent of the electricity generated in Washington state. == Design and function == Columbia Generating Station is a BWR-5, a more robust and updated version of the type of reactor used at the Fukushima Daiichi Nuclear Power Plant. It features a Mark II containment structure. The reactor core holds up to 764 fuel assemblies, and 185 control rods. The reactor is licensed for a power output of 3486 thermal megawatts (MWt). The gross electrical output of the plant is 1230 megawatts-electric (MWe). The Columbia Generating Station features six low-profile fan-driven cooling towers. Each tower cascades clean warmed water, a byproduct of water heat exchanging with steam after leaving a turbine, down itself and subsequently cools the warmed water via a combination of evaporation and heat exchange with the surrounding air. Some water droplets fall back to earth in the process, thereby creating a hoar frost in the winter. At times, the vapor cloud from the cooling towers can reach in height and can be seen at a great distance. Replacement water for the evaporated water is drawn from the nearby Columbia River. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Columbia Generating Station」の詳細全文を読む スポンサード リンク
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