10 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Acid Carbonates"  
Results: 1 - 10
open access

Leaching study of PNL 76-68 glass beads using the LLNL continuous-flow method and the PNL-modified IAEA method. Final report

Description: Lawrence Livermore National Laboratory (LLNL) has conducted a long-term single-pass continuous-flow (SPCF) leaching test of the glass waste form PNL 76-68. Leaching rates of Np, Pu, and various stable elements were measured at 25/sup 0/ and 75/sup 0/C with three different solutions and three different flow rates. The purposes of the study were: (1) to compare SPCF leaching results with the results of a modified IAEA leach test performed by Pacific Northwest Laboratories (PNL); (2) to establish … more
Date: August 20, 1982
Creator: Buddemeier, R. W.; Coles, D. G.; Mensing, R. W.; Rego, J. & Weed, H. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Leaching of actinides and technetium from simulated high-level waste glass

Description: Leach tests were conducted using a modified version of the IAEA procedure to study the behavior of glass waste-solution interactions. Release rates were determined for Tc, U, Np, Pu, Am, Cm, and Si in the following solutions: WIPP B salt brine, NaCl (287 g/l), NaCl (1.76 g/1), CaCl/sub 2/ (1.66 g/l), NaHCO/sub 3/ (2.52 g/l), and deionized water. The leach rates for all elements decreased an order of magnitude from their initial values during the first 20 to 30 days leaching time. The sodium bic… more
Date: August 1, 1979
Creator: Bradley, D.J.; Harvey, C.O. & Turcotte, R.P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Single-pass continuous-flow leach test of PNL 76-68 glass: some selected Bead Leach I results

Description: A single-pass continuous-flow leach test of PNL 76-68 glass beads (7 mm dia) was concluded after 420 days of uninterrupted operation. Variables included in the experimental matrix were flow-rate, leachant composition, and temperature. Analysis was conducted on all leachate samples for /sup 237/Np and /sup 239/Pu as well as a number of nonradioactive elements. Results indicated that flow-rate and leachant systematically affected the leach rate, but only slightly. Temperature effects were signifi… more
Date: August 20, 1981
Creator: Coles, D. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Initiating the D&D Project for the EBR-II

Description: A novel decommissioning project is underway to close the Experimental Breeder Reactor-II (EBR-II) “fast” reactor at the Idaho National Laboratory (INL), Materials and Fuels Complex (MFC) facility near Idaho Falls, ID. The facility was placed in cold shutdown in 1994 and work began on the removal of the metallic sodium coolant. The bulk of the sodium was drained and treated beginning in 2001. The residual sodium heel was chemically passivated to render it less reactive in 2005 using a novel carb… more
Date: August 1, 2010
Creator: Demmer, Rick
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Carbon Dioxide Capture From Flue Gas Using Dry Regenerable Sorbents Quarterly Technical Progress Report: April-June 2003

Description: This report describes research conducted between April 1, 2003 and June 30, 2003 on the use of dry regenerable sorbents for concentration of carbon dioxide from flue gas. Grade 1 sodium bicarbonate performed similarly to grade 5 sodium bicarbonate in fixed bed testing in that activity improved after the first carbonation cycle and did not decline over the course of 5 cycles. Thermogravimetric analysis indicated that sodium bicarbonate sorbents produced by calcination of sodium bicarbonate are s… more
Date: August 1, 2003
Creator: Green, David A.; Turk, Brian S.; Portzer, Jeffrey W.; Gupta, Raghubir P.; McMichael, William J.; Liang, Ya et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Natural radioactivity in geothermal waters, Alhambra Hot Springs and nearby areas, Jefferson County, Montana

Description: Radioactive hot springs issue from a fault zone in crystalline rock of the Boulder batholith at Alhambra, Jefferson County, in southwestern Montana. The discharge contains high concentrations of radon, and the gross activity and the concentration of radium-226 exceed maximum levels recommended by the Environmental Protection Agency for drinking water. Part of the discharge is diverted for space heating, bathing, and domestic use. The radioactive thermal waters at measured temperatures of about … more
Date: August 1, 1977
Creator: Leonard, R.B. & Janzer, W.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Technical Basis Document No. 6: Waste Package and Drip Shield Corrosion

Description: The waste package and drip shield will experience a wide range of interactive environmental conditions and degradation modes that will determine the overall performance of the waste package and repository. The operable modes of degradation are determined by the temperature regime of operation (region), and are summarized here. Dry-Out Region (T {ge} 120 C; 50 to 400 Years): During the pre-closure period, the waste package will be kept dry by ventilation air. During the thermal pulse, heat gener… more
Date: August 1, 2003
Creator: Farmer, J.; Pasupathi, V.; Nair, P.; Gordon, G.; McCright, D.; Gdowski, G. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The use of carbonate lixiviants to remove uranium from uranium-contaminated soils

Description: The objective of this research was to design an extraction media and procedure that would selectively remove uranium without adversely affecting the soils` physicochemical characteristics or generating secondary waste forms difficult to manage or dispose of. Investigations centered around determining the best lixivant and how the various factors such as pH, time, and temperature influenced extraction efficiency. Other factors investigated included the influence of attrition scrubbing, the effec… more
Date: August 1, 1997
Creator: Francis, C. W.; Lee, S. Y.; Wilson, J. H.; Timpson, M. E. & Elless, M. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Comparison of neptunium sorption results using batch and column techniques

Description: We used crushed-rock columns to study the sorption retardation of neptunium by zeolitic, devitrified, and vitric tuffs typical of those at the site of the potential high-level nuclear waste repository at Yucca Mountain, Nevada. We used two sodium bicarbonate waters (groundwater from Well J-13 at the site and water prepared to simulate groundwater from Well UE-25p No. 1) under oxidizing conditions. It was found that values of the sorption distribution coefficient, Kd, obtained from these column … more
Date: August 1, 1996
Creator: Triay, I. R.; Furlano, A. C.; Weaver, S. C.; Chipera, S. J. & Bish, D. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Pilot-scale treatability testing -- Recycle, reuse, and disposal of materials from decontamination and decommissioning activities: Soda blasting demonstration

Description: The US Department of Energy (DOE) is in the process of defining the nature and magnitude of decontamination and decommissioning (D and D) obligations at its sites. With disposal costs rising and available storage facilities decreasing, DOE is exploring and implementing new waste minimizing D and D techniques. Technology demonstrations are being conducted by LMES at a DOE gaseous diffusion processing plant, the K-25 Site, in Oak Ridge, Tennessee. The gaseous diffusion process employed at Oak Rid… more
Date: August 1995
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen