Liquid metal cooled reactor Clementine was the first liquid metal cooled nuclear reactor and used mercury coolant, thought to be the obvious choice since it is liquid at room temperature. However, because of disadvantages including high toxicity, high vapor pressure even at room temperature, low boiling point, producing noxious fumes when heated, relatively low thermal conductivity, and a high neutron cross-section, it has fallen out of favor. Sodium and NaK (a eutectic sodium-potassium alloy) do not corrode steel to any significant degree and are compatible with many nuclear fuels, allowing for a wide choice of structural materials. They do, however, ignite spontaneously on contact
Liquid Snake Liquid who carries the superior genes. Snake meets Liquid for the first time after he is taken captive by the enemy and imprisoned in a medical room. The two brothers battle each other multiple times throughout the story. First, Liquid tries to kill Snake by piloting a Hind D and pursuing him across the Communication Towers, but Snake destroys the helicopter with anti-air Stinger missiles. Afterward, Liquid manipulates Snake into activating Metal Gear REX by disguising himself as Snake's mentor Master Miller. Snake destroys REX, but falls unconscious in the aftermath, allowing Liquid to take his unconscious brother to the