Permissible tritium concentration in methane when using the methane for cooking

Automatic translation: It must be ensured that by using tritium (T) contaminated methane the population is only exposed to low levels of radiation. The exposure path that is critical for the population is the use of methane in the home, especially for use in cooking. It is recommended to limit the annual radiation exposure resulting from this exposure path to 1 μJ/kg (0.1 mrem), what an annual mean permissible T concentration in methane of corresponds to approximately 3.3 x 10^-3 / s Ncm ³ (9.10^-8 pCi / Ncm³). Won't diluted with natural gas in the distribution network, this is it Value identical to the mean T-release concentration from the gas generation plant. The dose guide value used here is derived from the information given in point 3 recommended as a basis for planning for reasons outlined in this note. In the later approval process for an NPW system, however, a higher value (e.g. by a factor of 10) should first be offered so as not to give you the freedom of movement from the outset narrow strongly.