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Neptunium, Plutonium, and Americium Solubility and Speciation Studies in a Neutral Electrolyte with a Total Carbonate Concentration Simulating UE-25P No. 1 Well Water

Conference · · High Level Radioactive Waste Management: Proceedings of the Sixth Annual International Conference
OSTI ID:127117
 [1];  [1];  [2]
  1. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  2. Institut fuer Radiochemie, Dresden (Germany)
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In these experiments we have approached the solubility equilibrium from oversaturation. Results are given for solubility and speciation experiments of 237NpO2+, 239Pu4+, and 241Am3+/Nd3+ in a neutral electrolyte (0.1 M NaClO4) containing a total carbonate concentration similar to UE-25p #1 groundwater (0.015 M) at 25° C and at three pH values (6, 7, and 8.5). In these experiments, the solubility-controlling solids were identified and the speciation and/or oxidation states present in the supernatant solutions were determined. Trivalent neodymium was used as an oxidation state analog for 241Am(III) in order to reduce the radiolysis effects in the solutions. The 241Am(III) was included as a tracer for radioanalytical counting of samples.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC03-76SF00098
OSTI ID:
127117
Report Number(s):
CONF-9504179--; ISBN: 0-7844-0082-2
Journal Information:
High Level Radioactive Waste Management: Proceedings of the Sixth Annual International Conference, Journal Name: High Level Radioactive Waste Management: Proceedings of the Sixth Annual International Conference
Publisher:
American Nuclear Society, Inc.; American Society of Civil Engineers
Country of Publication:
United States
Language:
English

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Related Subjects

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
54 ENVIRONMENTAL SCIENCES
AMERICIUM 241
ENVIRONMENTAL TRANSPORT
GROUND WATER
HIGH-LEVEL RADIOACTIVE WASTES
NEPTUNIUM 237
NEPTUNIUM OXIDES
PLUTONIUM 239
RADIOACTIVE WASTE DISPOSAL
RADIOACTIVE WASTE FACILITIES
RADIONUCLIDE MIGRATION
SITE CHARACTERIZATION
SOLUBILITY
UNDERGROUND FACILITIES
VALENCE
WELLS
YUCCA MOUNTAIN
Yucca Mountain Project