1 DCR ee ty 450202 a ae te transport E1400 -- Nuclear Explosions 10/5/550 ee -- Explosions & Explosives -- Nuclear -- Weaponry -- INIS Subject Categories: B3110* 01862075 \ (Item 250 from file: AIX-17-064767; (-1989) -- Radioactive materials monitoring & 103) ERA-12-001743; EDB-86-185969 Title: Fallout plutonium in Western North Pacific sediments Author(s): Livingston, H.D. Affiliation: Woods Hole Oceanographic Institution, MA, USA Title: Behaviour of long-lived radionuclides associated with deep-sea disposal of radioactive wastes. Report of a co-ordinated research programme 1982-1984 Corporate Source: International Atomic Energy Agency, Vienna (Austria) Woods Hole Oceanographic Institution, MA (USA) Publication Date: Apr 1986 p 27-34 Report Number(s): IAERA-TECDOC-368 Order Number: DE86704234 Document Type:,~Analytic of a Report; Numerical data Language: English Journal Announcement: EDB8&6039 Availability: NTIS Subfile: AIX) ERA (US Sales Only), PC A0O8/MF AOQl. (Energy Research Abstracts). INIS (non-US Atomindex input Country of Origin: United States Country of Publication: International Atomic Energy Agency <IAEA> Abstract: The study compared sediment samples from the Mid-Pacific Gyre area north of Hawaii and from the Western North Pacific. The latter had from 2.7-5.5 the concentrations of Pu isotopes compared with the former, but the profiles with depth were similar. The increased levels were probably due to close-in fall-out from the Marshall Islands weapons tests. The inventories for water column plus sediment were 4.0-4.3 mCi km/sup -2/ for NW Pacific and 2.9 for the Mid Pacific area. The proportions in the sediments are respectively 8% and 2%. Evidence is presented that close-in fallout was more available to scavenging. For NW Pacific, significant, bioturbation, effects were seen, redistributing Pu as deep as 46 cm, even though these sediments are abyssal. This implies subsurface waste disposal may be more vulnerable to the effects of bioturbation than previously supposed. 7 refs, 2Z figs, 2 tabs. Major Descriptors: *PLUTONIUM 239 ~- RADIOECOLOGICAL CONCENTRATION; *PLUTONIUM 240 -- RADIOECOLOGICAL CONCENTRATION; *SEDIMENTS -- FALLOUT DEPOSITS; *SEDIMENTS -- RADIONUCLIDE MIGRATION Descriptors: ADSORPTION; DEPTH; EXPERIMENTAL DATA; PACIFIC OCEAN; RADIOACTIVITY; SEA BED; SEAWATER; SEDIMENT-WATER INTERFACES Broader Terms: ACTINIDE ISOTOPES; ACTINIDE NUCLEI; ALPHA DECAY RADIOISOTOPES; DATA; DIMENSIONS; ECOLOGICAL CONCENTRATION; ENVIRONMENTAL TRANSPORT; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; FALLOUT; HEAVY NUCLEI; HYDROGEN COMPOUNDS; INFORMATION; INTERFACES; ISOTOPES; MASS TRANSFER; NUCLEI; NUMERICAL DATA; OXYGEN COMPOUNDS; PLUTONIUM ISOTOPES; RADIOCISOTOPES; SEAS; SORPTION; SURFACE WATERS; WATER; YEARS LIVING RADIOISOTOPES Subject Categories: 510300* Materials Monitoring & 520300 -- Environment, Transport -- (1989) -- Environment, Transport -- Terrestrial -- Radioactive (-1989) Aquatic -- Radioactive Materials Monitoring & 052002 -- Nuclear Fuels -- Waste Disposal & Storage INIS Subject Categories: B3110* -- Radioactive materials monitoring & transport B3200 -- Water i 10/5/551 (Item 251 from file: 103) 01861646 Author(s): ERA-12-001446; Cavanagh, 2003815 P.J.; EDB-86-185540 Gibson, H.F.; Kirn, F.S.; Miller; Wyckoff,