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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Boiling Nuclear Superheater (BONUS) Reactor Facility ： ウィキペディア英語版 Boiling Nuclear Superheater (BONUS) Reactor Facility The Boiling Nuclear Superheater (BONUS) Reactor Facility, also known to the locals as "Domes", or formally as Museo Tecnologico BONUS Dr. Modesto Iriarte, is a decommissioned nuclear plant in Rincón, Puerto Rico. It was listed on the U.S. National Register of Historic Places in 2007.〔 ==History== BONUS was a prototype whose objective was to assess the economic and technical feasibility of the integral boiling superheating concept. The construction of BONUS started in 1960, and the reactor had its first controlled nuclear chain reaction on April 13, 1964. In September 1965 full power operation was achieved with 50MW thermal power, and steam temperatures of 900°F (482°C). Operation of the BONUS reactor was terminated in June 1968 because of technical difficulties and the ensuing need for high-cost modifications. The Puerto co Water Resources Authority decommissioned the reactor between 1969 and 1970. During decommissioning, all special nuclear materials (fuel) and certain highly activated components (e.g., control rods and shims) were removed from the island to the US mainland, all piping systems were flushed, the reactor vessel and associated internal components within the biological shield were entombed in concrete and grout, and systems external to the entombment were decontaminated. Many contaminated and activated materials were placed in the main circulation pump room beneath the pressure vessel and entombed in concrete.〔 General decontamination of the reactor was performed with the goal of meeting unrestricted use criteria in all accessible areas of the building. Residual radioactive materials remaining in the structure were isolated or shielded to protect site visitors and workers. During subsequent years, more radioactive contamination was identified in portions of the building, and additional clean-up and shielding activities were conducted in the 1990s and early 2000s.〔 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「Boiling Nuclear Superheater (BONUS) Reactor Facility」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.