Radionuclides and radioactivity in soils within and around Los Alamos National Laboratory, 1974 through 1994: Concentrations, trends, and dose comparisons

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A soil sampling and analysis program is the most direct means of determining the concentration, inventory, and distribution of radionuclides and radioactivity in the environment within and around nuclear facilities. This report summarizes and evaluates the concentrations of {sup 3}H, {sup 137}Cs, {sup 238}Pu, {sup 239,240}Pu, {sup 241}Am, {sup 90}Sr, total uranium, and gross alpha, beta, and gamma activity in soils collected from Los Alamos National Laboratory (LANL), perimeter, and regional (background) areas over a 21-year period (1974 through 1994). Also, trends in radionuclide concentrations and radioactivity over time and the total effective dose equivalent (TEDE) were determined for each ... continued below

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46 p.

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Fresquez, P.R.; Mullen, M.A.; Ferenbaugh, J.K. & Perona, R.A. April 1, 1996.

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Description

A soil sampling and analysis program is the most direct means of determining the concentration, inventory, and distribution of radionuclides and radioactivity in the environment within and around nuclear facilities. This report summarizes and evaluates the concentrations of {sup 3}H, {sup 137}Cs, {sup 238}Pu, {sup 239,240}Pu, {sup 241}Am, {sup 90}Sr, total uranium, and gross alpha, beta, and gamma activity in soils collected from Los Alamos National Laboratory (LANL), perimeter, and regional (background) areas over a 21-year period (1974 through 1994). Also, trends in radionuclide concentrations and radioactivity over time and the total effective dose equivalent (TEDE) were determined for each site. The upper-limit regional background concentration (95% upper-confidence level) for each radionuclide and level of radioactivity were as follows: {sup 3}H (6.34 pCi mL{sup {minus}1}), {sup 137}Cs (1.13 pCi dry g{sup {minus}1}), {sup 238}Pu (0.008 pCi dry g{sup {minus}1}), {sup 239,240}Pu (0.028 pCi dry g{sup {minus}1}), {sup 241}Am (0.208 pCi dry g{sup {minus}1}), {sup 90}Sr (0.82 pCi dry g{sup {minus}1}), total uranium (4.05 {micro}g dry g{sup {minus}1}); and gross alpha (35.24 pCi dry g{sup {minus}1}), beta (13.62 pCi dry g{sup {minus}1}), and gamma (7.33 pCi dry g{sup {minus}1}) activity. Based on the average over the years, most LANL and perimeter soils contained three or more radionuclides and/or gross radioactive that were significantly higher in concentration (p < 0.05) than regional background. The net dose (TEDE minus background) for residents living on-site at LANL or along its perimeter ranged from {minus}0.3 mrem y{sup {minus}1} (east of TA-54) to 3.8 mrem y{sup {minus}1} (east of Ta-53) and from {minus}0.4 mrem y{sup {minus}1} (White Rock) to 3.6 mrem yy{sup {minus}1} (west of LANL on Forest Service land across from TA-8GT site).

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46 p.

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INIS; OSTI as DE96010051

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  • Other Information: PBD: Apr 1996

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  • Other: DE96010051
  • Report No.: LA--13149-MS
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/226013 | External Link
  • Office of Scientific & Technical Information Report Number: 226013
  • Archival Resource Key: ark:/67531/metadc664491

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  • April 1, 1996

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  • June 29, 2015, 9:42 p.m.

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  • Feb. 26, 2016, 3:59 p.m.

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Fresquez, P.R.; Mullen, M.A.; Ferenbaugh, J.K. & Perona, R.A. Radionuclides and radioactivity in soils within and around Los Alamos National Laboratory, 1974 through 1994: Concentrations, trends, and dose comparisons, report, April 1, 1996; New Mexico. (digital.library.unt.edu/ark:/67531/metadc664491/: accessed December 10, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.