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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 Gravel Gertie ： ウィキペディア英語版 Gravel Gertie A Gravel Gertie is a type of bunker designed to provide containment during the nuclear weapons assembly process, when the plutonium or highly enriched uranium "pit" is mated with the high explosive components and wired into the electronics (the "physics package") of the warhead. ==Design== The Gravel Gertie was developed for the Atomic Energy Commission in 1957 by Sandia National Laboratories. It was named after the character of the same name from the Dick Tracy comics; the compressed mass of gravel forming the ceiling of the bunker reportedly reminded researchers of Gertie's grey, curly hair. A modification of existing domed munitions bunkers, the Gravel Gertie was designed specifically to contain nuclear materials in the event of a catastrophic "low order" detonation of a bomb being serviced. Full nuclear detonation was highly unlikely and impossible to design against, but high-ton/low-kiloton level "fizzles" were a very real risk during assembly, disassembly and maintenance, especially when servicing older designs with fewer redundant failsafes and more room for error. A Gravel Gertie has thick reinforced concrete walls and roof, but a large vent in the top to prevent the shell from rupturing in an explosion. Below the roof, however, is approximately 7 metres of loosely compressed porous gravel suspended from steel cables above a false ceiling over the work area. In the event of an explosion, the mass of gravel is designed to compress and move upward with the initial blast, sealing the hole in the roof while allowing some of the gas pressure to escape by passing through the gravel. This "filters" the escaping gases and prevents the building from rupturing. The mass of gravel then falls down into the room when the gases cool, trapping large amounts of radioactive particles under and within the gravel, further minimizing leakage. The design specification called for an ability to "sufficiently contain" a 1 kiloton fizzle. 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「Gravel Gertie」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.