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Formation of hydrogen negative ions by surface and volume processes with application to negative ion sources

Description: During the last few decades interest in negative-hydrogen ion sources has been directed mainly toward synchrotron and other particle accelerator applications, with emphasis on high current densities delivered for short pulses. But within the last several years there has been an awareness in the magnetic fusion program of the future need for negative ions as a means for generating high energy neutral beams, beams with energies above a few hundred keV. Negative ions seem to be the only effective … more
Date: June 27, 1979
Creator: Hiskes, J.R.
Partner: UNT Libraries Government Documents Department
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Molecular potentials and relaxation dynamics

Description: The use of empirical pseudopotentials, in evaluating interatomic potentials, provides an inexpensive and convenient method for obtaining highly accurate potential curves and permits the modeling of core-valence correlation, and the inclusion of relativistic effects when these are significant. As an example, recent calculations of the chi/sup 1/..sigma../sup +/ and a/sup 3/..sigma../sup +/ states of LiH, NaH, KH, RbH, and CsH and the chi/sup 2/..sigma../sup +/ states of their anions are discusse… more
Date: March 27, 1981
Creator: Karo, A.M.
Partner: UNT Libraries Government Documents Department
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The Hanford Site Tank Waste Remediation System: An update

Description: The U.S. Department of Energy`s Hanford Site, located in southeastern Washington State, has the most diverse and largest amount of highly radioactive waste in the United States. High-level radioactive waste has been stored in large underground tanks since 1944. Approximately 230,000 m{sup 3} (61 Mgal) of caustic liquids, slurries, saltcakes, and sludges have {sup 137}Cs accumulated in 177 tanks. In addition, significant amounts of {sup 90}Sr and were removed from the tank waste, converted to sa… more
Date: January 27, 1994
Creator: Alumkal, W. T.; Babad, H.; Harmon, H. D. & Wodrich, D. D.
Partner: UNT Libraries Government Documents Department
open access

HIGH ASPECT RATIO ION EXCHANGE RESIN BED - HYDRAULIC RESULTS FOR SPERICAL RESIN BEADS

Description: A principal role of the DOE Savannah River Site is to safely dispose of a large volume of liquid nuclear waste held in many storage tanks. An in-tank ion exchange unit is being considered for cesium removal to accelerate waste processing. This unit is planned to have a relatively high bed height to diameter ratio (10:1). Complicating the design is the need to cool the ion exchange media; therefore, the ion exchange column will have a central cooling core making the flow path annular. To separat… more
Date: September 27, 2007
Creator: Duignan, M; Charles Nash, C & Timothy Punch, T
Partner: UNT Libraries Government Documents Department
open access

PROCESSING ALTERNATIVES FOR DESTRUCTION OF TETRAPHENYLBORATE

Description: Two processes were chosen in the 1980's at the Savannah River Site (SRS) to decontaminate the soluble High Level Waste (HLW). The In Tank Precipitation (ITP) process (1,2) was developed at SRS for the removal of radioactive cesium and actinides from the soluble HLW. Sodium tetraphenylborate was added to the waste to precipitate cesium and monosodium titanate (MST) was added to adsorb actinides, primarily uranium and plutonium. Two products of this process were a low activity waste stream and a … more
Date: February 27, 2007
Creator: Lambert, D; Thomas Peters, T & Samuel Fink, S
Partner: UNT Libraries Government Documents Department
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Multiple Ion Exchange Column Tests for Technetium Removal from Hanford Tank Waste Supernate

Description: Five cycles of loading, elution, and regeneration were performed to remove technetium from a Hanford waste sample retrieved from Tank 241-AW-101 using SuperLig 639 resin. The waste sample was diluted to 4.95 M Na plus and then was processed to remove 137Cs through dual ion exchange columns each containing 15 mL of SuperLig 644. To remove 99Tc, the cesium decontaminated solution was processed downwards through two ion exchange columns, each containing 12 mL of SuperLig 639 resin. The columns, de… more
Date: February 27, 2004
Creator: Hassan, N. M.
Partner: UNT Libraries Government Documents Department
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A Model for Predicting Fission Product Activities in Reactor Coolant: Application of Model for Estimating I-129 Levels in Radioactive Waste

Description: A general model was developed to estimate the activities of fission products in reactor coolant and hence to predict a value for the I-129/Cs-137 scaling factor; the latter can be applied along with measured Cs-137 activities to estimate I-129 levels in reactor waste. The model accounts for fission product release from both defective fuel rods and uranium contamination present on in-core reactor surfaces. For simplicity, only the key release mechanisms were modeled. A mass balance, considering … more
Date: February 27, 2003
Creator: Lewis, B. J. & Husain, A.
Partner: UNT Libraries Government Documents Department
open access

Testing of stripping columns for the removal of benzene from aqueous radioactive salt solution

Description: Radioactive high level wastes (HLW) generated from production of special nuclear materials at the Savannah River Site (SRS) are held in interim storage in 51 underground, million gallon tanks. Radioactive cesium ({sup 137}Cs) is segregated by evaporation of aqueous waste solution for interim storage in a salt matrix comprised of Na and K salts or in concentrated salt solution. The saltcake will be dissolved and {sup 137}Cs will be separated from the nonradioactive salts in solution in the In-Ta… more
Date: June 27, 1995
Creator: Georgeton, G. K.; Taylor, G. A. & Gaughan, T. P.
Partner: UNT Libraries Government Documents Department
open access

Program overview: Remedial actions at Oak Ridge National Laboratory

Description: Research on and development of civilian and defense uses of nuclear materials and technologies have occurred at Oak Ridge National Laboratory (ORNL) since its creation as part of the World War II Manhattan Project in 1943. A diverse legacy of contaminated inactive facilities, research areas, and waste management areas exists; many are candidates for remedial action. Most attention is focused on waste management sites which contain the bulk of ORNL's environmental contamination. A wide variety o… more
Date: July 27, 1988
Creator: Bates, L.D. & Trabalka, J.R.
Partner: UNT Libraries Government Documents Department
open access

Cesium Ion Exchange Program at the Hanford River Protection Project Waste Treatment Plant

Description: The Hanford Waste Treatment and Immobilization Plant (WTP) will use cesium ion exchange to remove Cs-137 from Low Activity Waste (LAW) down to a maximum activity of 0.3 Ci/m3 in the Immobilized LAW (ILAW) product. The WTP Project baseline for cesium ion exchange is the elutable SuperLig(R) 644 (SL-644) resin (registered trademark of IBC Advanced Technologies, Inc., American Fork, UT) or a U. S. Department of Energy (DOE) approved equivalent. SL-644 is solely available through IBC Advanced Techn… more
Date: February 27, 2005
Creator: CHARLES, NASH
Partner: UNT Libraries Government Documents Department
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