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Title: Pinon Pine Tree Study, Los Alamos National Laboratory: Source document

One of the dominant tree species growing within and around Los Alamos National Laboratory (LANL), Los Alamos, NM, lands is the pinon pine (Pinus edulis) tree. Pinon pine is used for firewood, fence posts, and building materials and is a source of nuts for food--the seeds are consumed by a wide variety of animals and are also gathered by people in the area and eaten raw or roasted. This study investigated the (1) concentration of {sup 3}H, {sup 137}Cs, {sup 90}Sr, {sup tot}U, {sup 238}Pu, {sup 239,240}Pu, and {sup 241}Am in soils (0- to 12-in. [31 cm] depth underneath the tree), pinon pine shoots (PPS), and pinon pine nuts (PPN) collected from LANL lands and regional background (BG) locations, (2) concentrations of radionuclides in PPN collected in 1977 to present data, (3) committed effective dose equivalent (CEDE) from the ingestion of nuts, and (4) soil to PPS to PPN concentration ratios (CRs). Most radionuclides, with the exception of {sup 3}H in soils, were not significantly higher (p < 0.10) in soils, PPS, and PPN collected from LANL as compared to BG locations, and concentrations of most radionuclides in PPN from LANL have decreased over time. The maximum net CEDE (themore » CEDE plus two sigma minus BG) at the most conservative ingestion rate (10 lb [4.5 kg]) was 0.0018 mrem (0.018 {micro}Sv). Soil-to-nut CRs for most radionuclides were within the range of default values in the literature for common fruits and vegetables.« less
Authors:
; ; ;
Publication Date:
OSTI Identifier:
752387
Report Number(s):
LA-13693-MS
TRN: US0003009
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 1 Jan 2000
Research Org:
Los Alamos National Laboratory, Los Alamos, NM (US)
Sponsoring Org:
USDOE Office of Environment, Safety and Health (EH) (US)
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; 61 RADIATION PROTECTION AND DOSIMETRY; LANL; TRITIUM; CESIUM 137; STRONTIUM 90; PLUTONIUM 238; PLUTONIUM 239; PLUTONIUM 240; AMERICIUM 241; SOILS; PINES; BIOLOGICAL ACCUMULATION; ENVIRONMENTAL IMPACTS; CONTAMINATION; DOSE EQUIVALENTS