Self Powered Exit Signs and the Relative Biological Risk

Self Powered Exit Signs and the Relative Biological Risk -...

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Self Powered Exit Signs and the Relative Biological Risk In my research I found that tritium (chemical symbol H-3) is a self-powered isotope of the element hydrogen which allows for self-powered exit signs to function ( www.self-poweredexitsigns.com ). What this web-site did not mention (they are trying to sell the signs) is that tritium is a radioactive form of hydrogen. Tritium comes to be in one of two ways. First, tritium can be naturally produced by the interaction of the cosmic rays with the atmosphere ( www.epa.gov ). Secondly, tritium can also be produced as a by-product in reactors producing electricity, and in special production reactors, where the isotope lithium-6 is bombarded to produce tritium. The latter production method for tritium is the source products like exit signs. Mixing tritium with a chemical that emits light in the presence of radiation, known as “phosphor in a tube” (a sealed source) creates a continuous, self-powered light source (from both sources mentioned before). Other
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Self Powered Exit Signs and the Relative Biological Risk -...

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