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
XM Liquid Metal A website was set up called XMLM Underground for all the metal fans on XM. This continued well into 2006. On March 22, 2006, head of programing, Eric Logan, dropped hints on the "Opie and Anthony Show" on High Voltage that Liquid Metal will be returning soon. An official announcement on the Opie and Anthony Show was expected the following day. Logan confirmed it on the Opie and Anthony Show of March 23 that XM Liquid Metal will again be broadcast via the satellites on all 5 of XM's musical outlets (US sats, Canadian sats, DirecTV, AOL Radio, XM Radio