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LABORATORY REPORT ON THE REMOVAL OF PERTECHNETATE FROM TANK 241-AN-105 SIMULANT USING PUROLITE A530E (open access)

LABORATORY REPORT ON THE REMOVAL OF PERTECHNETATE FROM TANK 241-AN-105 SIMULANT USING PUROLITE A530E

This report documents the laboratory testing and analyses as directed under the test plan, LAB-PLN-11-00010, Evaluation of Technetium Ion Exchange Material against Hanford Double Shell Tank Supernate Simulate with Pertechnetate. Technetium (Tc-99) is a major fission product from nuclear reactors, and because it has few applications outside of scientific research, most of the technetium will ultimately be disposed of as nuclear waste. The radioactive decay of Tc-99 to ruthenium 99 (Ru-99) produces a low energy {beta}{sup -} particle (0.1 MeV max). However, due to its fairly long half-life (t{sub 1/2} = 2.13E05 years), Tc-99 is a major source of radiation in low-level waste (UCRL-JRNL-212334, Current Status of the Thermodynamic Data for Technetium and its Compounds and Aqueous Species). Technetium forms the soluble oxy anion, TcO{sub 4}{sup -} under aerobic conditions. This anion is very mobile in groundwater and poses a health risk (ANL, Radiological and Chemical Fact Sheets to Support Health Risk Analyses for Contaminated Areas). It has been demonstrated that Purolite{reg_sign} A530E is highly effective in removing TcO{sub 4}{sup -} from a water matrix (RPP-RPT-23199, The Removal of Technetium-99 from the Effluent Treatment Facility Basin 44 Waste Using Purolite A-530E, Reillex HPQ, and Sybron IONAC SR-7 Ion Exchange Resins). …
Date: April 17, 2012
Creator: JB, DUNCAN; HAGERTY KJ, MOORE WP & JM, JOHNSON
System: The UNT Digital Library
An Overview of Tax Provisions Expiring in 2012 (open access)

An Overview of Tax Provisions Expiring in 2012

A number of tax provisions either expired in 2011 or are scheduled to expire at the end of this 2012. As Congress decides whether to extend these provisions, it may consider the estimated revenue losses associated with their extension as well as other factors when evaluating tax policy. In the 112th Congress, Members have yet to consider legislation that would extend all of the provisions discussed in this report, although legislation to extend certain provisions has been considered.
Date: April 17, 2012
Creator: Crandall-Hollick, Margot L.
System: The UNT Digital Library
Quantitative Study Of Guide Field Effects on Hall Reconnection In A Laboratory Plasma (open access)

Quantitative Study Of Guide Field Effects on Hall Reconnection In A Laboratory Plasma

The effect of guide field on magnetic reconnection is quantitatively studied by systematically varying an applied guide field in the Magnetic Reconnection Experiment (MRX). The quadrupole field, a signature of two-fluid reconnection at zero guide field, is significantly altered by a finite guide field. It is shown that the reconnection rate is significantly reduced with increasing guide field, and this dependence is explained by a combination of local and global physics: locally, the in-plane Hall currents are reduced, while globally guide field compression produces an increased pressure both within and downstream of the reconnection region. __________________________________________________
Date: April 17, 2012
Creator: Tharp, T. D.; Yamada, M.; Ji, H.; Lawrence, E.; Dorfman, S. & Myers, C.
System: The UNT Digital Library
U.S. Postal Service: Challenges Related to Restructuring the Postal Service's Retail Network (open access)

U.S. Postal Service: Challenges Related to Restructuring the Postal Service's Retail Network

A letter report issued by the Government Accountability Office with an abstract that begins "Over the past 5 years, the U.S. Postal Service (USPS) has taken several actions to restructure its retail network through reducing its workforce and its footprint while expanding retail alternatives. USPS officials estimated that it had saved about $800 million from reducing the number of work hours dedicated to retail operations. USPS also closed 631 of its post offices, but it did not have cost-savings estimates for these closures. Most of the facilities closed (500) were in response to a postmaster vacancy or the suspension of operations due to an expired lease or irreparable damage following a natural disaster. Fewer closures (131) have resulted from nationwide reviews that USPS initiated in 2009 and 2011. USPS has also restructured its retail network by expanding alternatives through self-service options as well as partnerships with other retailers."
Date: April 17, 2012
Creator: United States. Government Accountability Office.
System: The UNT Digital Library