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in subjects: "Extraction Columns"

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RECOVERY OF PALLADIUM FROM NUCLEAR WASTE SOLUTIONS USING A PACKED COLUMN OF TRICAPRYL MONOMETHYL AMMONIUM CHLORIDE ON AN INERT SUPPORT.

No Description Available.

Date: October 31, 1969

Creator: Colvin, C.A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Consolidated Fuel Reprocessing Program. Operating experience with pulsed-column holdup estimators

Methods for estimating pulsed-column holdup are being investigated as part of the Safeguards Assessment task of the Consolidated Fuel Reprocessing Program (CFRP) at the Oak Ridge National Laboratory. The CFRP was a major sponsor of test runs at the Barnwell Nuclear Fuel plant (BNFP) in 1980 and 1981. During these tests, considerable measurement data were collected for pulsed columns in the plutonium purification portion of the plant. These data have been used to evaluate and compare three avail… more

Date: January 1, 1986

Creator: Ehinger, M.H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Alpha-contained laboratory scale pulse column facility for SRL

For studying solvent extraction processes, a laboratory-sized pulse column facility was constructed at the Savannah River Laboratory. This facility, in conjunction with existing miniature mixer-settler equipment and the centrifugal contactor facility currently under construction at SRL, provides capability for cross comparison of solvent extraction technology. This presentation describes the design and applications of the Pulse Column Facility at SRL.

Date: January 1, 1980

Creator: Reif, D. J.; Cadieux, J. R.; Fauth, D. J. & Thompson, M. C.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Removal of actinides from nuclear reprocessing wastes: a pilot plant study using non-radioactive simulants

Nuclear fuel reprocessing wastes generated at the ICPP contain small amounts of actinides, primarily Pu and Am. Removal of these actinides reduces the long term storage hazards of the waste. The development of a flowsheet to remove trivalent actinides is discussed in this paper. Pilot plant studies used actinide simulants. As a result of these studies, the Height of a Transfer Unit (HTU) was selected as the better measure of pulse column separation efficiency.

Date: January 1, 1980

Creator: Maxey, H.R.; McIsaac, L.D.; Chamberlain, D.B. & McManus, G.J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Comparison of predicted and measured pulsed-column profiles and inventories

Nuclear materials accounting and process control in fuels reprocessing plants can be improved by near-real-time estimation of the in-process inventory in solvent-extraction contactors. Experimental studies were conducted on pilot- and plant-scale pulsed columns by Allied-General Nuclear Service (AGNS), and the extensive uranium concentration-profile and inventory data were analyzed by Los Alamos and AGNS to develop and evaluate different predictive inventory techniques. Preliminary comparisons … more

Date: January 1, 1983

Creator: Ostenak, C.A. & Cermak, A.F.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Material accounting in a complex chemical processing unit: an application of estimation/detection

The design of a real-time material accounting technique for a complex chemical processing unit is considered. This technique is applied to a liquid--liquid extraction column where sensitive and/or expensive material is being processed. On-line material accounting is accomplished using a generalized likelihood ratio detector. It is shown that the detector performs well on simulated data which includes various diversion schemes.

Date: October 1, 1977

Creator: Candy, J.V.; Emmert, R.A. & Patterson, G.K.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Direct enzymatic extraction of starch from corn as an energy-saving alternative to production of high-fructose syrup. Quarterly progress report, July 1, 1981-September 30, 1981

Progress is reported on the project to extract starch from corn efficiently. The procedure for removing organic impurities from corn syrup is described. Data are graphically shown of the ultraviolet scan of the dirty and clean syrup. Impurity in the glucose syrup could be reduced from 0.51 gm/ml level using the sedimental method down to 0.23 mg/ml by filtering the syrup through diatomic earth filter. The industrial products contain about 0.37 mg/ml (industrial product also filtered through diat… more

Date: January 1, 1981

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Dynamic materials accounting for solvent-extraction systems

Methods for estimating nuclear materials inventories in solvent-extraction contactors are being developed. These methods employ chemical models and available process measurements. Comparisons of model calculations and experimental data for mixer-settlers and pulsed columns indicate that this approach should be adequate for effective near-real-time materials accounting in nuclear fuels reprocessing plants.

Date: January 1, 1979

Creator: Cobb, D.D. & Ostenak, C.A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Purex: process and equipment performance

The Purex process is the solvent extraction system that uses tributyl phosphate as the extractant for separating uranium and plutonium from irradiated reactor fuels. Since the first flowsheet was proposed at Oak Ridge National Laboratory in 1950, the process has endured for over 30 years with only minor modifications. The spread of the technology was rapid, and worldwide use or research on Purex-type processes was reported by the time of the 1955 Geneva Conference. The overall performance of th… more

Date: January 1, 1986

Creator: Orth, D.A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Computer simulation of a nitrogen oxides absorption column at the Savannah River Site

A computer model of a nitrogen oxides absorption column has been constructed for the purpose of testing process control strategies in a time- and cost-effective manner. The model consists of a simplified physical and chemical scheme that approximately matches real column behavior. Various feedback, feedforward, and recycle strategies have been tested, and an optimum combination selected. This combination will be tested in the plant in the near future. The overall project goals, the behavior of … more

Date: January 1, 1989

Creator: Peterson, S. R. & Shanahan, K. L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Removal of actinides from nuclear fuel reprocessing wastes using an organophosphorous extractant. [DHDECMP]

By removing actinides from nuclear fuel reprocessing wastes, long term waste storage hazards are reduced. A solvent extraction process to remove actinides has been demonstrated in miniature mixer-settlers and in simulated columns using actinide feeds. Nonradioactive pilot plant results have established the feasibility of using pulse columns for the process.

Date: January 1, 1980

Creator: Chamberlain, D.B.; Maxey, H.R.; McIsaac, L.D. & McManus, G.J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Effect of pulsed-column-inventory uncertainty on dynamic materials accounting

Reprocessing plants worldwide use the Purex solvent-extraction process and pulsed-column contactors to separate and purify uranium and plutonium from spent nuclear fuels. The importance of contactor in-process inventory to dynamic materials accounting in reprocessing plants is illustrated using the Allied-General Nuclear Services Plutonium Purification Process (PPP) of the now decommissioned Barnwell Nuclear Fuels Plant. This study shows that (1) good estimates of column inventory are essential… more

Date: January 1, 1985

Creator: Ostenak, C.A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Neutral Beam Injection for Plasma and Magnetic FieldDiagnostics

At the Lawrence Berkeley National Laboratory (LBNL) adiagnostic neutral beam injection system for measuring plasma parameters,flow velocity, and local magnetic field is being developed. High protonfraction and small divergence is essential for diagnostic neutral beams.In our design, a neutral hydrogen beam with an 8 cm x 11 cm (or smaller)elliptical beam spot at 2.5 m from the end of the extraction column isproduced. The beam will deliver up to 5 A of hydrogen beam to the targetwith a pulse wid… more

Date: August 1, 2007

Creator: Vainionpaa, Jaakko Hannes; Leung, Ka Ngo; Kwan, Joe W. & Levinton,Fred

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

BRANCHED ALKANES FROM BLUE-GREEN ALGAE

Branched alkanes from blue-green algae were separated on a 750 feet high resolution capillary gas chromatographic column. The mixture was found to be 90% of 1:1 ratio 7-methyl, and 8-methyl-heptadecane, and 10% of 6-methylheptadecane. An optical rotation of +2.5 {+-} 0.5 was obtained on a 5 mg of mixture.

Date: August 1, 1970

Creator: Han, Jerry & Calvin, Melvin.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Liquid-Liquid Extraction Equipment

Solvent extraction processing has demonstrated the ability to achieve high decontamination factors for uranium and plutonium while operating at high throughputs. Historical application of solvent extraction contacting equipment implies that for the HA cycle (primary separation of uranium and plutonium from fission products) the equipment of choice is pulse columns. This is likely due to relatively short residence times (as compared to mixer-settlers) and the ability of the columns to tolerate s… more

Date: December 1, 2008

Creator: Law, Jack D. & Todd, Terry A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Thermal Analysis for in-Tank Ion-Exchange Column Process

High Level Waste (HLW) at the Savannah River Site (SRS) is stored in three forms: sludge, saltcake, and supernate. A small column ion-exchange (SCIX) process is being designed to treat dissolved saltcake waste before feeding it to the saltstone facility to be made into grout. The waste is caustic with high concentrations of various sodium salts and lower concentrations of radionuclides. Two cation exchange media being considered are a granular form of crystalline silicotitanate (CST) and a sphe… more

Date: January 5, 2009

Creator: Lee, S. & Frank02 Smith, F.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Salt Processing Through Ion Exchange at the Savannah River Site Selection of Exchange Media and Column Configuration - 9198

The Department of Energy (DOE) has developed, modeled, and tested several different ion exchange media and column designs for cesium removal. One elutable resin and one non-elutable resin were considered for this salt processing application. Deployment of non-elutable Crystalline Silicotitanate and elutable Resorcinol Formaldehyde in several different column configurations were assessed in a formal Systems Engineering Evaluation (SEE). Salt solutions were selected that would allow a grouping of… more

Date: February 11, 2009

Creator: Spires, Renee; Punch, Timothy & McCabe, Daniel

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Applicability of hydroxylamine nitrate reductant in pulse-column contactors

Uranium and plutonium separations were made from simulated breeder reactor spent fuel dissolver solution with laboratory-sized pulse column contactors. Hydroxylamine nitrate (HAN) was used for reduction of plutonium (1V). An integrated extraction-partition system, simulating a breeder fuel reprocessing flowsheet, carried out a partial partition of uranium and plutonium in the second contactor. Tests have shown that acceptable coprocessing can be ontained using HAN as a plutonium reductant. Puls… more

Date: May 1, 1983

Creator: Reif, D.J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Real time material accountability in a chemical reprocessing unit

Real time material accountability for a pulse column in a chemical reprocessing plant has been investigated using a simple two state Kalman Filter. Operation of the pulse column was simulated by the SEPHIS-MOD4 code. Noisy measurements of the column inventory were obtained from two neutron detectors with various simulated counting errors. Various loss scenarios were simulated and analyzed by the Kalman Filter. In all cases considered the Kalman Filter was a superior estimator of material loss.

Date: January 1, 1979

Creator: Morrison, G.W. & Blakeman, E.D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Effect of backmixing on pulse column performance

A critical survey of the published literature concerning dispersed phase holdup and longitudinal mixing in pulsed sieve-plate extraction columns has been made to assess the present state-of-the-art in predicting these two parameters, both of which are of critical importance in the development of an accurate mathematical model of the pulse column. Although there are many conflicting correlations of these variables as a function of column geometry, operating conditions, and physical properties of… more

Date: May 1, 1979

Creator: Miao, Y.W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Consolidated fuel recycle program. Annular pulse column development studies interim development report

The capacity of critically safe cylindrical pulse columns limits the size of nuclear fuel solvent extraction plants because of the limited cross-sectional area of plutonium, U-235, or U-233 processing columns. Thus, there is a need to increase the cross-sectional area of these columns. This can be accomplished through the use of a column having an annular cross section. The preliminary testing of a pilot-plant-scale annular column has been completed and is reported. The column is made from 152.… more

Date: July 1, 1979

Creator: Benedict, G.E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Process monitor design for an extraction column: an application of estimation/detection

The NRC Safeguards Program at LLL is directed toward developing a methodology for assessing the effectiveness of material control and accounting systems at processing/reprocessing facilities for special nuclear material. The methodology under development requires many types of mathematical models including performance models of safeguard components. Included in the class of safeguard components are real-time measurement systems which incorporate on-line estimators/detectors for the timely detec… more

Date: March 1, 1979

Creator: Candy, J.V.; Emmert, R.A. & Patterson, G.K.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Survey of simulation methods for modeling pulsed sieve-plate extraction columns

The report first considers briefly the use of liquid-liquid extraction in nuclear fuel reprocessing and then describes the operation of the pulse column. Currently available simulation models of the column are reviewed, and followed by an analysis of the information presently available from which the necessary parameters can be obtained for use in a model of the column. Finally, overall conclusions are given regarding the information needed to develop an accurate model of the column for materia… more

Date: March 1, 1979

Creator: Burkhart, L.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Experimental validation of pulsed column inventory estimators

Near-real-time accounting (NRTA) for reprocessing plants relies on the timely measurement of all transfers through the process area and all inventory in the process. It is difficult to measure the inventory of the solvent contractors; therefore, estimation techniques are considered. We have used experimental data obtained at the TEKO facility in Karlsruhe and have applied computer codes developed at Clemson University to analyze this data. For uranium extraction, the computer predictions agree … more

Date: January 1, 1991

Creator: Beyerlein, A.L.; Geldard, J.F. (Clemson Univ., SC (United States)); Weh, R. (Gesellschaft fuer Nuklear-Service mbH, Hannover (Germany)); Eiben, K.; Dander, T. (Wiederaufbereitungsanlage Karlsruhe Betriebsgesellschaft mbH (WAK), Eggenstein-Leopoldshafen (Germany)) & Hakkila, E.A. (Los Alamos National Lab., NM (United States))

Item Type: Article

Partner: UNT Libraries Government Documents Department