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Fusible plugs enhance the safety of liquid fluoride thorium reactors by preventing overheating of the reactor. In the event that a limit temperature is reached, a fusible plug placed at the bottom of the reactor melts, allowing the fluid reactor fuel to drain into underground storage tanks, preventing nuclear meltdown. [21]
The Welch plug is a type of core plug that is made from a thin disc of metal. The Welch plug is dome-shaped and inserted into the casting hole with the convex side facing outwards. [ 6 ] When installed by striking the Welch plug with a hammer, the dome collapses slightly, expanding it laterally to seal the hole.
Garboard strakes and related near-keel members Diagram of typical modern metal-hulled ship’s exterior plating, with a single strake highlighted in red On a vessel's hull , a strake is a longitudinal course of planking or plating which runs from the boat's stempost (at the bows ) to the sternpost or transom (at the rear).
Perko is a surname. Notable people with the surname include: Aapo Perko (1924–2021), Finnish shot putter; Franc Perko (1929—2008), theologian, archbishop and ...
[3] [4] Sumire Hoshino (星野スミレ, Hoshino Sumire) / Perman 3 (パーマン 3号, Pāman San-gō) / Perko (パー子, Pāko) / Pergirl Although a girl, she is officially addressed as "Perman 3", but is nicknamed "Perko". Her secret identity, which she doesn't reveal even to her teammates, is Sumire Hoshino, who is a famous child actress.
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