Dose Assessment of Los Alamos National Laboratory-Derived Residual Radionuclides in Soils within C Tracts (C-2, C-3, and C-4) for Land Transfer Decisions

Gillis, Jessica M.¹  Whicker, Jeffrey J. 

[1] Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

关键词: CESIUM 137;    PLUTONIUM 239;    LANL;    SOILS;    RADIATION DOSES;    SAMPLING;    ABUNDANCE;    ALARA;    CONTAMINATION;    COST;    RADIOACTIVITY;    COST BENEFIT ANALYSIS;    LAND RECLAMATION Environmental Protection;    Radiation Protection;   

DOI  :  10.2172/1237215
RP-ID  :  LA--UR-16-20394
PID  :  OSTI ID: 1237215
Others  :  TRN: US1600295

学科分类：环境科学（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

Three separate Sampling and Analysis Plans (SAPs) were prepared for tracts C-2, C-3, and C-4. The objective of sampling was to confirm, within the stated statistical confidence limits, that the mean levels of potential radioactive residual contamination in soils in the C Tracts are documented, in appropriate units, and are below the 15 mrem/y (150 ??Sv/y) Screening Action Levels (SALs). Results show that radionuclide concentration upper-bound 95% confidence levels were close to background levels, with the exception of Pu-239 and Cs-137 being slightly elevated above background, and all measurements were below the ALs and meet the real property release criteria for future construction or recreational use. A follow-up ALARA analysis showed that the costs of cleanup of the soil in areas of elevated concentration and confirmatory sampling would far exceed any benefit from dose reduction.