Report Number(s): Order Number: CONF-9008144--Summ. UCRL-ID-110051 DE94003878 Contract Number (DOE): W-7405-ENG-48 Availability: Distribution: OSTI; NTIS; (Report) :1 cowed Document Type: Report; Conference Literature Language: English Journal Announcement: EDB9403 GPO Dep. MN-702 INIS; (MF):4 Subfile: ERA (Energy Research Abstracts); ETD (Energy Technology Data Exchange); INS (US Atomindex input); NTS (NTIS). IMS (DOE coritractor) US DOE Project/NonDOE Project: P Country of Origin: United States Country of Publication: United States Abstract: This paper presents the results of a workshop conducted on the apparent different bioavailability of isotopes [sup 238]Pu and [sup 239]Pu. There is a substantial body of evidence that [sup 238]Pu as commonly found in the environment is more biologically available than [sup 239]Pu. Studies of the Trinity Site, Nevada Test Site from nonnuclear and nuclear events, Rocky Flats, Enewetak and Bikini, and the arctic tundra support this conclusion and indicate that the bioavailability of [sup 238]Pu is more than an order of magnitude greater than that of [sup 239]Pu. Plant and soil studies from controlled environments and from Savannah River indicate no isotopic difference in availability of Pu to plants; whereas studies at the Trinity Site do suggest a difference. While it is possible that these observations can be explained by problems in the experimental procedure and analytical techniques, this possibility is remote given the ubiquitous nature of the observations. Studies of solubility of Pu in the stomach contents of cattle grazing at the Nevada Test Site and from fish from Bikini Atoll both found that [sup 238]Pu was more soluble than [sup 239]Pu. Studies of the Los Alamos effluent stream indicate that as particle size decreases, the content of [sup 238]Pu relative to {sup 239]Pu increases. Major Descriptors: *FOOD CHAINS -- CONTAMINATION; *PLUTONIUM 238 -- BIOLOGICAL AVAILABILITY; *PLUTONIUM 239 -- BIOLOGICAL AVAILABILITY; *SOILS ~- CONTAMINATION Descriptors: ARCTIC REGIONS; BIKINI; CATTLE; ENIWETOK; FISHES; LOS ALAMOS; NEVADA TEST SITE; PLANTS Broader Terms: ACTINIDE ISOTOPES; ACTINIDE NUCLEI; ALPHA DECAY RADIOISOTOPES; ANIMALS; AQUATIC ORGANISMS; CRYOSPHERE; DEVELOPED COUNTRIES; DOMESTIC ANIMALS; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; HEAVY ION DECAY RADIOISOTOPES; HEAVY NUCLEI; ISLANDS; ISOTOPES; MAMMALS; MARSHALL ISLANDS; MICRONESIA; NATIONAL ORGANIZATIONS; NEW MEXICO; NORTH AMERICA; NUCLEI; OCEHANTA; PLUTONIUM ISOTOPES; POLAR REGIONS; RADIOISOTOPES; RUMINANTS; SILICON 32 DECAY RADIOISOTOPES; SPONTANEOUS FISSION RADIOISOTOPES; URBAN AREAS; US DOE; US ORGANIZATIONS; USA; VERTEBRATES; YEARS LIVING RADIOISOT; YEARS LIVING RADIOISOTOPES Subject Categories: 540230* -- Environment, Terrestrial -- Radid@active Materials Monitoring & Transport -- (1990-) 560162 -- Radionuclide Effects, Kinetics, & Toxicology -- Animals, Plants, Microorganisms, & Cells INIS Subject Categories: B3110* -- Radioactive materials monitoring & transport C2120 -- Radioisotope effects, kinetics, & toxicology in animals, plants & microorganisms 10/5/303 (Item 3 from file: 103) 03599177 EDB-94-015143 Title: Adsorption and desorption kinetics of cesium in an organic matter-rich soil saturated with different cations Author(s): Aharoni, C. (Technion-Israel Inst. of Technology, (Israel)); Pasricha, N.S. (India)); Sparks, D.L. (Univ. of Delaware, Source: Soil Science (United States) v 156:4. 0038-075x Publication Date: Oct 1993 Haifa (Punjab Agricultural Univ., Ludihana Newark, DE (United States) ) Coden: SOSCAK ISSN: p 233-239 59035654