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Hanford Tank Farms Waste Certification Flow Loop Test Plan

Description: A future requirement of Hanford Tank Farm operations will involve transfer of wastes from double shell tanks to the Waste Treatment Plant. As the U.S. Department of Energy contractor for Tank Farm Operations, Washington River Protection Solutions anticipates the need to certify that waste transfers comply with contractual requirements. This test plan describes the approach for evaluating several instruments that have potential to detect the onset of flow stratification and critical suspension v… more
Date: January 1, 2010
Creator: Bamberger, Judith A.; Meyer, Perry A.; Scott, Paul A.; Adkins, Harold E.; Wells, Beric E.; Blanchard, Jeremy et al.
Partner: UNT Libraries Government Documents Department
open access

The universal criterion for switching a magnetic vortex core in soft magnetic nanodots

Description: The universal criterion for ultrafast vortex core switching between core-up and -down vortex bi-states in soft magnetic nanodots was empirically investigated by micromagnetic simulations and combined with an analytical approach. Vortex-core switching occurs whenever the velocity of vortex core motion reaches a critical value, which is {nu}{sub c} = 330 {+-} 37 m/s for Permalloy, as estimated from numerical simulations. This critical velocity was found to be {nu}{sub c} = {eta}{sub c}{gamma} {ra… more
Date: October 1, 2008
Creator: Lee, K. S.; Kim, S. K.; Yu, Y. S.; Choi, Y. S.; Guslienko, K. Y.; Jung, H. et al.
Partner: UNT Libraries Government Documents Department
open access

Pipeline Cross-Site Transfer Assessment for Tank 241-SY-101 Waste

Description: This study evaluated the feasibility of transferring waste now stored in Tank SY-101 in the 200 West Area of the Hanford Site to a storage tank in 200 East Area through a 6.2-mile-long, 3-inch-diameter stainless steel pipeline. Using the Wasp slurry transport model, the critical velocity and expected pressure drop were calculated to determine 1) whether current SY-101 waste can be transferred through the existing cross-site transfer pipeline without additional dilution and, if it is not possibl… more
Date: February 20, 2002
Creator: Onishi, Yasuo; Wells, Beric E.; Hartley, Stacey A. & Cooley, Scott K.
Partner: UNT Libraries Government Documents Department
open access

Hydraulic Instability of Reactor Parallel-Plate Fuel Assemblies

Description: The work on the hydraulic collapse or instability of flat plates was extended by considering flow redistribution and the effect of unequal friction drops in the deflected region of the channels. A general formula for the pressure distribution over a plate as a function of the plate deflection is derived. From this general formula, linearized formulas for small deflections are derived for the pressure distribution and the critical velocity. Graphs of pressure distribution for various assumed def… more
Date: July 13, 1959
Creator: Johansson, E.B.
Partner: UNT Libraries Government Documents Department
open access

Contribution to report ``Critical flow phenomena in two-phase mixtures and their relationships to reactor safety`` (for Geneva conference)

Description: Normally, in the flow of a flashing liquid through a pipe, it is assumed that the location of the choking phenomenon, if it exists, is at the exist of the pipe. Experiments have indicated that thee are circumstances under which choking can occur at the entrance instead. These experiments were performed to study the flashing of initially-compressed water through short lengths of pipe with length/diameter ratios of up to 20. Entrance configurations considered included sharp and rounded transition… more
Date: January 23, 1964
Creator: Zaloudek, F. R.
Partner: UNT Libraries Government Documents Department
open access

Flow velocity analysis for avoidance of solids deposition during transport of Hanford tank waste slurries

Description: This engineering analysis calculates minimum slurry transport velocities intended to maintain suspensions of solid particulate in slurries. This transport velocity is also known as the slurry flow critical velocity. It is not universally recognized that a transfer line flow velocity in excess of the slurry critical velocity is a requirement to prevent solids deposition and possible line plugging. However, slurry critical velocity seems to be the most prevalent objective measure to prevent solid… more
Date: February 25, 1999
Creator: Estey, Scott D.
Partner: UNT Libraries Government Documents Department
open access

Steam-Water Critical Flow From High Pressure Systems. Interim Report

Description: In an earlier report, the problems associated with the prediction of the critical discharge rates of steam-water mixtures were discussed in detail. That report also gave the results of an experimental investigation of critical flows from long flow passages performed at low pressures. That investigation was later extended to consider short tubes, nozzles, and orifice flow configurations. The present work was undertaken to experimentally investigate the critical discharge phenomenon at higher pre… more
Date: January 30, 1964
Creator: Zaloudek, F. R.
Partner: UNT Libraries Government Documents Department
open access

Test Loop Demonstration and Evaluation of Slurry Transfer Line Critical Velocity Measurement Instruments

Description: This report presents the results of the evaluation of three ultrasonic sensors for detecting critical velocity during slurry transfer between the Hanford tank farms and the WTP.
Date: July 31, 2010
Creator: Bontha, Jagannadha R.; Jenks, Jeromy WJ; Morgen, Gerald P.; Peters, Timothy J.; Wilcox, Wayne A.; Adkins, Harold E. et al.
Partner: UNT Libraries Government Documents Department
open access

A Qualitative Investigation of Deposition Velocities of a Non-Newtonian Slurry in Complex Pipeline Geometries

Description: The External Flowsheet Review Team (EFRT) has identified the issues relating to the Waste Treatment and Immobilization Plant (WTP) pipe plugging. Per the review’s executive summary, “Piping that transports slurries will plug unless it is properly designed to minimize this risk. This design approach has not been followed consistently, which will lead to frequent shutdowns due to line plugging.” To evaluate the potential for plugging, testing was performed to determine critical velocities for the… more
Date: May 11, 2009
Creator: Yokuda, Satoru T.; Poloski, Adam P.; Adkins, Harold E.; Casella, Andrew M.; Hohimer, Ryan E.; Karri, Naveen K. et al.
Partner: UNT Libraries Government Documents Department
open access

Improvement and Verification of Fast Reactor Safety Analysis Techniques. Progress Report, October 1, 1977--December 31, 1977

Description: The critical superficial vapor velocity was measured for an open vessel system with chemically produced internal heat. The measured value was within experimental error of the value predicted by the Kutateladze stability criterion. The greatest error induced was in the measurement of the energy generation rate. The effects of mixtures were taken into account. Further work suggestions are also presented.
Date: January 1, 1977
Creator: Barker, D. H. & Wheeler, P. A.
Partner: UNT Libraries Government Documents Department
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