scholarly journals Long-Term Waste Stabilization Parameter Estimation, Savannah River Site, Aiken, South Carolina

2002 ◽  
Author(s):  
W E Jones
Keyword(s):  
South Carolina ◽  
Parameter Estimation ◽  
Savannah River Site ◽  
Savannah River ◽  
Waste Stabilization ◽  
Stabilization Parameter ◽  
River Site

scholarly journals Iodide Accumulation by Aerobic Bacteria Isolated from Subsurface Sediments of a129I-Contaminated Aquifer at the Savannah River Site, South Carolina

2011 ◽  
Vol 77 (6) ◽  
pp. 2153-2160 ◽  
Author(s):  
Hsiu-Ping Li ◽  
Robin Brinkmeyer ◽  
Whitney L. Jones ◽  
Saijin Zhang ◽  
Chen Xu ◽  
...  
Keyword(s):  
South Carolina ◽  
Savannah River Site ◽  
Chloride Ions ◽  
Aerobic Bacteria ◽  
Savannah River ◽  
Bacterial Strains ◽  
Contaminated Aquifer ◽  
Substrate Saturation ◽  
River Site

ABSTRACT129I is of major concern because of its mobility in the environment, excessive inventory, toxicity (it accumulates in the thyroid), and long half-life (∼16 million years). The aim of this study was to determine if bacteria from a129I-contaminated oxic aquifer at the F area of the U.S. Department of Energy's Savannah River Site, SC, could accumulate iodide at environmentally relevant concentrations (0.1 μM I−). Iodide accumulation capability was found in 3 out of 136 aerobic bacterial strains isolated from the F area that were closely related toStreptomyces/Kitasatosporaspp.,Bacillus mycoides, andRalstonia/Cupriavidusspp. Two previously described iodide-accumulating marine strains, aFlexibacter aggregansstrain and anArenibacter troitsensisstrain, accumulated 2 to 50% total iodide (0.1 μM), whereas the F-area strains accumulated just 0.2 to 2.0%. Iodide accumulation by FA-30 was stimulated by the addition of H2O2, was not inhibited by chloride ions (27 mM), did not exhibit substrate saturation kinetics with regard to I−concentration (up to 10 μM I−), and increased at pH values of <6. Overall, the data indicate that I−accumulation likely results from electrophilic substitution of cellular organic molecules. This study demonstrates that readily culturable, aerobic bacteria of the F-area aquifer do not accumulate significant amounts of iodide; however, this mechanism may contribute to the long-term fate and transport of129I and to the biogeochemical cycling of iodine over geologic time.

Pressure Protection Evaluation Program at Savannah River Site

2003 ◽  
Author(s):  
James K. Chan ◽  
John W. Ramsey
Keyword(s):  
South Carolina ◽  
Computer Program ◽  
Material Handling ◽  
Nuclear Material ◽  
Savannah River Site ◽  
Pressure Vessels ◽  
Department Of Energy ◽  
Savannah River ◽  
Design Requirements ◽  
River Site

This paper describes the current pressure protection program at Savannah River Site (SRS), a Department of Energy chemical processing and nuclear material handling facility in Aiken, South Carolina. It gives a brief description of the design requirements based on ASME, API, CGA, and ASHRAE Codes. Equipment and systems requiring pressure protection at SRS are primarily pressure vessels, steam stations, process chemical systems, refrigerant and cryogenic systems and other air or gas systems. It is understood that any pressure protection program is built on five fundamental areas of responsibility: procurement, verification, registration, inspection, and repair. This paper focuses on the existing process of facility pressure protection evaluation for code compliance followed by identification of failure scenarios and system design requirements, valve selection and sizing, and verification record generation. Improvements to this process are recognized and discussed. They include the development of a computer program to perform pressure protection evaluation and generate verification records. The software would process all applicable pressure protection calculations using improved methodologies. All relevant data required would be accessible within the program. Pressure safety relief device attributes and system parameters would be displayed. The computer program would enhance design consistency, improve quality and plant safety, and make the pressure protection verification process more efficient and cost effective.

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