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Fate of Uranium during Sodium Aluminosilicate Formation under Waste Tank Conditions

Description: Experiments have been conducted to examine the fate of uranium during the formation of sodium aluminosilicate (NAS) when wastes containing high aluminate concentrations are mixed with wastes of high silicate concentration. Testing was conducted at varying degrees of uranium saturation. Testing examined typical tank conditions, e.g., stagnant, slightly elevated temperature (50 C). The results showed that under sub-saturated conditions uranium is not removed from solution to any large extent in b… more
Date: June 22, 2005
Creator: Wilmarth, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

STATUS OF THE DEVELOPMENT OF IN-TANK/AT-TANK SEPARATIONS TECHNOLOGIES FOR FOR HIGH-LEVEL WASTE PROCESSING FOR THE U.S. DEPARTMENT OF ENERGY

Description: Within the U.S. Department of Energy's (DOE) Office of Technology Innovation and Development, the Office of Waste Processing manages a research and development program related to the treatment and disposition of radioactive waste. At the Savannah River (South Carolina) and Hanford (Washington) Sites, approximately 90 million gallons of waste are distributed among 226 storage tanks (grouped or collocated in 'tank farms'). This waste may be considered to contain mixed and stratified high activity… more
Date: September 19, 2011
Creator: Aaron, G. & Wilmarth, B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The Role of Liquid Waste Pretreatment Technologies in Solving the Doe Clean-Up Mission

Description: The objective of this report is to describe the pretreatment solutions that allow treatment to be tailored to specific wastes, processing ahead of the completion schedules for the main treatment facilities, and reduction of technical risks associated with future processing schedules. Wastes stored at Hanford and Savannah River offer challenging scientific and engineering tasks. At both sites, space limitations confound the ability to effectively retrieve and treat the wastes. Additionally, the … more
Date: October 31, 2008
Creator: Wilmarth, B. & Sheryl Bush, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Results of the 2h Evaporator Acid Cleaning and in-Pot Neutralization

Description: The estimated 200 gallons of sodium aluminosilicate scale (NAS) present in the 242-16H Evaporator pot prior to chemical cleaning was subjected to four batches of 1.5 M (9 wt%) nitric acid. Each batch was neutralized with 19 M (50 wt %) sodium hydroxide (caustic) before transfer to Tank 38. The chemical cleaning process began on November 20, 2006, and was terminated on December 10, 2006. An inspection of the pot's interior was performed and based on data gathered during that inspection; the curr… more
Date: May 29, 2007
Creator: Wilmarth, B.; Phillip Norris, P. & Terry Allen, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

SORPTION OF URANIUM, PLUTONIUM AND NEPTUNIUM ONTO SOLIDS PRESENT IN HIGH CAUSTIC NUCLEAR WASTE STORAGE TANKS

Description: Solids such as granular activated carbon, hematite and sodium phosphates, if present as sludge components in nuclear waste storage tanks, have been found to be capable of precipitating/sorbing actinides like plutonium, neptunium and uranium from nuclear waste storage tank supernatant liqueur. Thus, the potential may exists for the accumulation of fissile materials in such nuclear waste storage tanks during lengthy nuclear waste storage and processing. To evaluate the nuclear criticality safety … more
Date: May 30, 2008
Creator: Oji, L; Bill Wilmarth, B & David Hobbs, D
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

SOLUBILITY OF URANIUM AND PLUTONIUM IN ALKALINE SAVANNAH RIVER SITE HIGH LEVEL WASTE SOLUTIONS

Description: Five actual Savannah River Site tank waste samples and three chemically-modified samples were tested to determine solubility limits for uranium and plutonium over a one year time period. Observed final uranium concentrations ranged from 7 mg U/L to 4.5 g U/L. Final plutonium concentrations ranged from 4 {micro}g Pu/L to 12 mg Pu/L. Actinide carbonate complexation is believed to result in the dramatic solubility increases observed for one sample over long time periods. Clarkeite, NaUO{sub 2}(O)O… more
Date: March 10, 2010
Creator: King, W.; Hobbs, D.; Wilmarth, B. & Edwards, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

SODIUM ALUMINOSILICATE SOLIDS AFFINITY FOR CESIUM AND ACTINIDES

Description: Washed sodium-aluminosilicate (NAS) solids at initial concentrations of 3.55 and 5.4 g/L sorb or uptake virtually no cesium over 288 hours, nor do any NAS solids generated during that time. These concentrations of solids are believed to conservatively bound current and near-term operations. Hence, the NAS solids should not have affected measurements of the cesium during the mass transfer tests and there is minimal risk of accumulating cesium during routine operations (and hence posing a gamma r… more
Date: July 31, 2007
Creator: Peters, T; Bill Wilmarth, B & Samuel Fink, S
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

SENSITIVITY ANALYSIS OF A TPB DEGRADATION RATE MODEL

Description: A tetraphenylborate (TPB) degradation model for use in aggregating Tank 48 material in Tank 50 is developed in this report. The influential factors for this model are listed as the headings in the table below. A sensitivity study of the predictions of the model over intervals of values for the influential factors affecting the model was conducted. These intervals bound the levels of these factors expected during Tank 50 aggregations. The results from the sensitivity analysis were used to identi… more
Date: August 1, 2006
Creator: Crawford, C; Tommy Edwards, T & Bill Wilmarth, B
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

ALUMINUM AND CHROMIUM LEACHING WORKSHOP WHITEPAPER

Description: A workshop was held on January 23-24, 2007 to discuss the status of processes to leach constituents from High Level Waste (HLW) sludges at the Hanford and Savannah River Sites. The objective of the workshop was to examine the needs and requirements for the HLW flowsheet for each site, discuss the status of knowledge of the leaching processes, communicate the research plans, and identify opportunities for synergy to address knowledge gaps. The purpose of leaching of non-radioactive constituents … more
Date: April 25, 2007
Creator: McCabe, D; Jeff Pike, J & Bill Wilmarth, B
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Results of Caustic Dissolution of Aluminosilicate Scale and Characterization Data for Samples From the Evaporator Pot and Gravity Drain Line

Description: The build-up of sodium aluminosilicate scale in the 2H Evaporator system continues to cause operational difficulties. The use of a nitric acid cleaning operation proved successful in 2001. However, the operation required additional facilities to support spent cleaning solution neutralization and was quite costly. A proposed caustic cleaning flowsheet has many advantages over the acid flowsheet. Therefore, samples were retrieved from the evaporator system (gravity drain line and pot) for both ch… more
Date: August 21, 2006
Creator: Wilmarth, B.; Rita Sullivan, R. & Chris Martino, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

USING WET AIR OXIDATION TECHNOLOGY TO DESTROY TETRAPHENYLBORATE

Description: A bench-scale feasibility study on the use of a Wet Air Oxidation (WAO) process to destroy a slurry laden with tetraphenylborate (TPB) compounds has been undertaken. WAO is an aqueous phase process in which soluble and/or insoluble waste constituents are oxidized using oxygen or oxygen in air at elevated temperatures and pressures ranging from 150 C and 1 MPa to 320 C and 22 MPa. The products of the reaction are CO{sub 2}, H{sub 2}O, and low molecular weight oxygenated organics (e.g. acetate, o… more
Date: April 4, 2007
Creator: Adu-Wusu, K; Daniel McCabe, D & Bill Wilmarth, B
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

ENTERPRISE SRS: LEVERAGING ONGOING OPERATIONS TO ADVANCE RADIOACTIVE WASTE MANAGEMENT TECHNOLOGIES

Description: The Savannah River Site (SRS) is repurposing its vast array of assets to solve future national issues regarding environmental stewardship, national security, and clean energy. The vehicle for this transformation is Enterprise SRS which presents a new, strategic view of SRS as a united endeavor for “all things nuclear” as opposed to a group of distinct and separate entities with individual missions and organizations. Key among the Enterprise SRS strategic initiatives is the integration of resear… more
Date: May 16, 2013
Creator: Murray, A.; Wilmarth, B.; Marra, J.; Mcguire, P. & Wheeler, V.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

ANALYSIS OF THE LEACHING EFFICIENCY OF INHIBITED WATER AND TANK SIMULANT IN REMOVING RESIDUES ON THERMOWELL PIPES

Description: A key component for the accelerated implementation and operation of the Salt Waste Processing Facility (SWPF) is the recovery of Tank 48H. Tank 48H is a type IIIA tank with a maximum capacity of 1.3 million gallons. Video inspection of the tank showed that a film of solid material adhered to the tank internal walls and structures between 69 inch and 150 inch levels. From the video inspection, the solid film thickness was estimated to be 1mm, which corresponds to {approx}33 kg of TPB salts (as 2… more
Date: October 20, 2011
Creator: Fondeur, F.; White, T.; Oji, L.; Martino, C. & Wilmarth, B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

SRNL PHASE 1 ASSESSMENT OF THE WTP WASTE QUALIFICATION PROGRAM

Description: The Hanford Tank Waste Treatment and Immobilization Plant (WTP) Project is currently transitioning its emphasis from an engineering design and construction phase toward facility completion, start-up and commissioning. With this transition, the WTP Project has initiated more detailed assessments of the requirements that must be met during the actual processing of the Hanford Site tank waste. One particular area of interest is the waste qualification program. In general, the waste qualification p… more
Date: March 6, 2012
Creator: Peeler, D.; Hansen, E.; Herman, C.; Marra, S. & Wilmarth, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

RECENT STUDIES OF URANIUM AND PLUTONIUM CHEMISTRY IN ALKALINE RADIOACTIVE WASTE SOLUTIONS

Description: Solubility studies of uranium and plutonium in a caustic, radioactive Savannah River Site tank waste solution revealed the existence of uranium supersaturation in the as-received sample. Comparison of the results to predictions generated from previously published models for solubility in these waste types revealed that the U model poorly predicts solubility while Pu model predictions are quite consistent with experimental observations. Separate studies using simulated Savannah River Site evapor… more
Date: June 13, 2006
Creator: King, W; Bill Wilmarth, B; David Hobbs, D & Tommy Edwards, T
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

REACTIVITY OF RESORCINOL FORMALDEHYDE RESIN WITH NITRIC ACID

Description: Solid-state infrared spectroscopy, differential scanning calorimetry, and elemental analysis have been used to evaluate the reactivity of resorcinol formaldehyde resin with nitric acid and characterize the solid product. Two distinct reactions were identified within the temperature range 25-55 C. The first reaction is primarily associated with resin nitration, while the second involves bulk oxidation and degradation of the polymer network leading to dissolution and off-gassing. Reaction was con… more
Date: June 14, 2006
Creator: King, W; Fernando Fondeur, F; Bill Wilmarth, B; Myra Pettis, M & Shirley Mccollum, S
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

ANALYSIS OF THE LEACHING EFFICIENCY OF INHIBITED WATER AND TANK 23H SIMULANT IN REMOVING RESIDUES ON TANK 48H WALLS

Description: Solid residues on two sets of thermowell pipe samples from the D2 riser in SRS Tank 48H were characterized. The residue thickness was determined using the ASTM standard D 3483-05 and was found to be three order of magnitudes below the 1mm thickness estimated from an earlier video of the tank cooling coil inspection. The actual estimated thickness ranged from 4 to 20.4 microns. The mass per unit area ranged from 1 to 5.3 milligrams per square inch. The residues appear to consist primarily of pot… more
Date: July 31, 2006
Creator: Fondeur, F; Thomas02 White, T; Lawrence Oji, L; Chris Martino, C & Bill Wilmarth, B
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Scientific Opportunities to Reduce Risk in Nuclear Process Science

Description: Cleaning up the nation’s nuclear weapons complex remains as one of the most technologically challenging and financially costly problems facing the U.S. Department of Energy (DOE). Safety, cost, and technological challenges have often delayed progress in retrieval, processing, and final disposition of high-level waste, spent nuclear fuel, and challenging materials. Some of the issues result from the difficulty and complexity of the technological issues; others have programmatic bases, such as co… more
Date: July 18, 2008
Creator: Bredt, P. R.; Felmy, A. R.; Gauglitz, P. A.; Hobbs, D. T.; Krahn, S.; Machara, N. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

SRNL PHASE 1 ASSESSMENT OF THE WAC/DQO AND UNIT OPERATIONS FOR THE WTP WASTE QUALIFICATION PROGRAM

Description: The Hanford Tank Waste Treatment and Immobilization Plant (WTP) is currently transitioning its emphasis from a design and construction phase toward start-up and commissioning. With this transition, the WTP Project has initiated more detailed assessments of the requirements related to actual processing of the Hanford Site tank waste. One particular area of interest is the waste qualification program to be implemented to support the WTP. Given the successful implementation of similar waste qualif… more
Date: May 16, 2012
Creator: Peeler, D.; Adamson, D.; Bannochie, C.; Cozzi, A.; Eibling, R.; Hay, M. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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