1.1 The intended use of this practice is for sampling of gasses containing 14C in inorganic, organic, or particulate forms. This sampling practice captures the 14C in a media that can be submitted to a laboratory for analysis typically by liquid scintillation counting (LSC). 1.2 This practice does not include the needed steps for the liberation of 14C from the media on which it was adsorbed or those for the preparation for LSC sample preparation in the laboratory before liquid scintillation analysis. This practice does not include the methodology used to analyze the prepared samples by LSC. 1.3 The overall 14C analytical detection capability is impacted by a number of factors including the volume sampled, the method used to desorb the 14C from the media, and the analytical method used the measure 14C from the media. This practice only directly addresses the volume of the gas stream from which any present 14C would be adsorbed. 1.4 The values stated in pCi units are to be regarded as standard given the reporting requirements of the United States Nuclear Regulatory Guide 1.21 (US NRC). The Bq values given in parenthesis are mathematical conversions to SI units that are provided for information only and are not considered standard. Other values stated in SI units are to be regarded as the standard. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
US NRC regulatory Guide 1.21 requires that all U.S. nuclear power plants estimate/measure their emission of C-14 in their gaseous effluents. These are required annual reports.
KeywordsC-14; Inorganic 14C; Organic 14C; gaseous effluents
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top