High-resolution stratigraphic modeling of the vadose zone at the Savannah River Site low-level radioactive waste trenches disposal facility

2005 ◽  
Vol 12 (4) ◽  
pp. 267-277 ◽  
Author(s):  
Douglas E. Wyatt ◽  
Frank H. Syms ◽  
Randolph Cumbest
Keyword(s):  
High Resolution ◽  
Radioactive Waste ◽  
Vadose Zone ◽  
Savannah River Site ◽  
Savannah River ◽  
Low Level ◽  
Disposal Facility ◽  
River Site ◽  
Low Level Radioactive Waste

Utilization of Radioactive Waste for Solidifying Material to Fill Waste Forms

2001 ◽  
Author(s):  
Takeshi Ishikura ◽  
Daiichiro Oguri
Keyword(s):  
Radioactive Waste ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Filling Ratio ◽  
Improved Method ◽  
Low Level ◽  
Waste Forms ◽  
Disposal Facility ◽  
Low Level Radioactive Waste

Abstract Minimizing the volume of radioactive waste generated during dismantling of nuclear power plants is a matter of great importance. In Japan waste forms buried in shallow burial disposal facility as low level radioactive waste (LLW) must be solidified by cement with adequate strength and must extend no harmful openings. The authors have developed an improved method to minimize radioactive waste volume by utilizing radioactive concrete and metal for mortar to fill openings in waste forms. Performance of a method to pre-place large sized metal or concrete waste and to fill mortar using small sized metal or concrete was tested. It was seen that the improved method substantially increases the filling ratio, thereby decreasing the numbers of waste containers.

THE BIOACCESSIBILITY OF LOW LEVEL RADIONUCLIDES FROM TWO SAVANNAH RIVER SITE SOILS

2002 ◽  
Vol 83 (4) ◽  
pp. 476-484 ◽  
Author(s):  
K. M. Ellickson ◽  
C. J. Schopfer ◽  
P. J. Lioy
Keyword(s):  
Savannah River Site ◽  
Savannah River ◽  
Low Level ◽  
River Site

scholarly journals Cesium Removal from Savannah River Site Radioactive Waste using the Caustic-Side Solvent Extraction (CSSX) Process

2005 ◽  
Vol 40 (1-3) ◽  
pp. 297-309 ◽  
Author(s):  
D. D. Walker ◽  
M. A. Norato ◽  
S. G. Campbell ◽  
M. L. Crowder ◽  
S. D. Fink ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Radioactive Waste ◽  
Savannah River Site ◽  
Savannah River ◽  
Cesium Removal ◽  
River Site

scholarly journals Radioactive Waste Evaporation: Current Methodologies Employed for the Development, Design and Operation of Waste Evaporators at the Savannah River Site and Hanford Waste Treatment Plant

2003 ◽  
Author(s):  
T. Bond Calloway ◽  
Christopher J. Martino ◽  
Carol M. Jantzen ◽  
William R. Wilmarth ◽  
Michael E. Stone ◽  
...  
Keyword(s):  
Radioactive Waste ◽  
Glass Matrix ◽  
Waste Treatment ◽  
Treatment Plant ◽  
Savannah River Site ◽  
Lessons Learned ◽  
Savannah River ◽  
Waste Treatment Plant ◽  
Modeling And Experiments ◽  
River Site

Evaporation of High Level and Low Activity (HLW & LAW) radioactive wastes for the purposes of radionuclide separation and volume reduction has been conducted at the Savannah River and Hanford Sites for more than forty years. Additionally, the Savannah River Site (SRS) has used evaporators in preparing HLW for immobilization into a borosilicate glass matrix. The Hanford River Protection Project (RPP) is in the process of building the world’s largest radioactive waste treatment facility, Waste Treatment Plant (WTP), which will use evaporators to concentrate the liquid waste and plant recycles prior to immobilization into a borosilicate glass matrix. Radioactive waste is evaporated at each site using various evaporator designs (e.g., forced circulation, horizontal bent tube). While the equipment used to evaporate radioactive waste is relatively simple in design, the complexity in the evaporator processes in current service and in those currently in the design stages stems from the heterogeneous nature of the waste and the effects of seemingly minor components (e.g., Si) on the process. Aqueous electrolyte thermodynamic modeling and experiments have been conducted by the SRS Savannah River Technology Center (SRTC) in support of the SRS HLW and Defense Waste Processing Facility (DWPF) Evaporators and the Hanford RPP WTP. After 40 years of successful operation, accumulation of two solid phases (a nitrated aluminosilicate, Na8AL6Si6O24(NO3)2•4H2O and sodium diuranate, Na2U2O7) developed as an insoluble phase in the Savannah River Site (SRS) 2H evaporator in 1996. The aluminosilicate scale deposit caused the SRS 2-H evaporator to become completely inoperable by October 1999. Accumulation of the sodium diuranate phase on the aluminosilicate scale has caused criticality concerns. Modeling and experiments were conducted to develop a method to control the process chemistry in order to prevent the formation of aluminosilicate deposits in the future. The lessons learned from the development, design, and operation of the SRS waste treatment facilities and the currently operating 242-A Hanford HLW evaporators were applied by SRTC in support of the development and design of the Hanford WTP evaporators. Thermodynamic equilibrium modeling along with solubility and physical property experiments are being conducted to develop process control and flow sheet models. Additionally, lessons learned from the development of an advanced antifoam agent for the SRS vitrification process evaporators are being applied to the testing and development of an antifoam agent for the Hanford WTP evaporators. This paper will discuss the methodologies, results, and achievements of the SRTC evaporator development program that was conducted in support of the SRS and Hanford WTP evaporator processes. The “cross-pollination” and application of waste treatment technologies and methods between the Savannah River and Hanford Sites will be highlighted. The “cross-pollination” of technologies and methods is expected to benefit the Department of Energy’s Mission Acceleration efforts by reducing the overall cost and time for the development of the baseline waste treatment processes.

scholarly journals Advances in 79Se analyses on Savannah river site radioactive waste matrices

2009 ◽  
Vol 282 (2) ◽  
pp. 663-667 ◽  
Author(s):  
D. P. DiPrete ◽  
C. C. DiPrete ◽  
N. E. Bibler ◽  
C. J. Bannochie ◽  
M. S. Hay
Keyword(s):  
Radioactive Waste ◽  
Savannah River Site ◽  
Savannah River ◽  
River Site
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