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in creator/contributor: "Rasmussen, D."

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Comparison of cask and drywell storage concepts for a monitored retrievable storage/interim storage system

The Department of Energy, through its Richland Operations Office is evaluating the feasibility, timing, and cost of providing a federal capability for storing the spent fuel, high-level wastes, and transuranic wastes that DOE may be obligated by law to manage until permanent waste disposal facilities are available. Three concepts utilizing a monitored retrievable storage/interim storage (MRS/IS) facility have been developed and analyzed. The first concept, co-location with a reprocessing plant,… more

Date: December 1, 1982

Creator: Rasmussen, D. E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

FBR pellet fabrication - density and dimensional control

The fuel pellet fabricating experience described in this paper involved pellet processing tests using mixed oxide (PuO/sub 2/-UO/sub 2/) powders to produce fast breeder reactor (FBR) fuel pellets. Objectives of the pellet processing tests were to establish processing parameters for sintered-to-size fuel pellets to be used in an irradiation test in the Fast Flux Test Facility and to establish baseline fabrication control information. 26 figures, 7 tables.

Date: January 1, 1982

Creator: Rasmussen, D. E. & Schaus, P.S.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Preirradiation microstructural characterization of FFTF mixed oxide fuel

Charts, drawings, graphs, and photographs are presented concerning the research program to evaluate potential for fuel to undergo densification during irradiation, to assure PuO/sub 2/ homogeneity in mixed oxide fuel, to provide data base for pre-/post-irradiation comparisons, and to evaluate effect of fuel fabrication conditions.

Date: January 1, 1981

Creator: Rasmussen, D. E. & Schaus, P.S.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

PRTR SECOND GENERATION SHIM ASSEMBLY

No Description Available.

Date: November 1, 1965

Creator: Rasmussen, D. E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Staff exchange with Freeborn Tool Company. Final project

Staff exchanges, such as the one described in this report, are intended to facilitate communication and collaboration among scientists and engineers at Department of Energy (DOE) laboratories, US industry, and academia. Funding support for these exchanges is provided by the DOE, Office of Energy Research, Laboratory Technology Transfer Program. Funding levels for each exchange typically range from $20,000 to $40,000. The exchanges offer the opportunity for the laboratories to transfer technolog… more

Date: September 1, 1994

Creator: Rasmussen, D. E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Measurements of the microwave power in the wall at EBT-I/S

An understanding of the microwave propagation and absorption in Elmo bumpy torus is critical because the plasma production, the heating, and the stabilization provided by the hot electron rings are dependent on these processes. A microwave power balance model was proposed earlier for EBT. This paper will describe a series of simple experiments designed to test this model by comparing its predictions and assumptions to both calorimetric and broad beam antenna measurements of microwave power at t… more

Date: January 1, 1982

Creator: Rasmussen, D.A.; Batchelor, D.B. & Hankins, O.E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Fabrication of 0. 5-inch diameter FBR mixed oxide fuel pellets

Large diameter (0.535 inch) mixed oxide fuel pellets for Fast Breeder Reactor application were successfully fabricated by the cold-press-and-sinter technique. Enriched UO/sub 2/, PuO/sub 2/-UO/sub 2/, and PuO/sub 2/-ThO/sub 2/ compositions were fabricated into nominally 90% theoretical density pellets for the UO/sub 2/ and PuO/sub 2/-UO/sub 2/ compositions, and 88% and 93% T.D. for the PuO/sub 2/-ThO/sub 2/ compositions. Some processing adjustments were required to achieve satisfactory pellet q… more

Date: September 12, 1979

Creator: Rasmussen, D. E.; Benecke, M. W. & McCord, R. B.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Mechanical design aspects of the Advanced Toroidal Facility Thomson scattering diagnostic

A two-dimensional Thomson scattering system has been designed for the Advanced Toroidal Facility (ATF), a torsatron experiment at the Oak Ridge National Laboratory (ORNL). The system is a modification of the Thomson scattering system used on the Impurity Study Experiment (ISX-B) tokamak. It will provide measurements of electron temperature (T/sub e/) and density (n/sub e/) at 15 points along a vertical chord. With multiple shots, a T/sub e/ and n/sub e/ map of a toroidal cross section of ATF ca… more

Date: January 1, 1987

Creator: Shipley, W.D.; Kindsfather, R.R. & Rasmussen, D.A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Detailed modeling of microwave energy deposition in EBT devices

Ray-tracing studies have been combined with a simple wave power balance model to provide a complete, albeit approximate, description of microwave power deposition in the ELMO Bumpy Torus (EBT-I), EBT-Scale (EBT-S), and EBT Proof-of-Principle (EBT-P) devices. Electron cyclotron absorption of ordinary and extraordinary waves by the combined core plasma and relativistic annuli is calculated using a fully relativistic damping package developed for the RAYS geometrical optics code. The rays are trac… more

Date: August 1, 1983

Creator: Batchelor, D.B.; Rasmussen, D.A. & Goldfinger, R.C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

The data acquisition and control system for Thomson Scattering on ATF (Advanced Toroidal Facility)

The 2-dimensional Thomson Scattering System measuring electron temperatures and densities in the Advanced Toroidal Facility (ATF) is interfaced to a VAX-8700 computer system running in a clustered configuration. Calibration, alignment, and operation of this diagnostic is under computer control. Extensive CAMAC instrumentation is used for timing control, data acquisition, and laser alignment. This paper will discuss the computer hardware and software, system operations, and data storage and retr… more

Date: January 1, 1989

Creator: Stewart, K.A.; Kindsfather, R.R. & Rasmussen, D.A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Fabrication of ThO/sub 2/, UO/sub 2/, and PuO/sub 2/-UO/sub 2/ pellets. [LMFBR]

Fabrication of ThO pellets for EBR-II irradiation testing and fabrication of UO/sub 2/ and PuO/sub 2/-UO/sub 2/ pellets for United Kingdom Prototype Fast Reactor (PFR) irradiation testing is discussed. Effect of process parameters on density and microstructure of pellets fabricated by the cold press and sinter technique is reviewed.

Date: January 1, 1978

Creator: Rasmussen, D.E.; Jentzen, W. R. & McCord, R. B.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

PRTR second generation shim assembly

From introduction: "This document discusses the design, fabrication, assembly, and testing of a second generation shim rod assembly, and testing of a second generation shim rod assembly prototype for use in the Plutonium Recycle Test Reactor."

Date: November 1964

Creator: Rasmussen, D. E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Design of an RF Antenna for a Large0Bore, High Power, Steady State Plasma Processing Chamber for Material Separation

The purpose of this Cooperative Research and Development Agreement (CRADA) between UT-Battelle, LLC, (Contractor), and Archimedes Technology Group, (Participant) is to evaluate the design of an RF antenna for a large-bore, high power, steady state plasma processing chamber for material separation. Criteria for optimization will be to maximize the power deposition in the plasma while operating at acceptable voltages and currents in the antenna structure. The project objectives are to evaluate th… more

Date: November 7, 2001

Creator: Rasmussen, D.A. & Freeman, R.L.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

ICRF direct electron heating experiments in TFTR

Direct electron damping of the fast wave is a prerequisite to a viable current drive scenario for future steady-state tokamaks. It is also an attractive heating altemative to the standard ion resonance heating methods for DT experiments on TFTR because it does not require the addition of non-reactive ion species and avoids minority ion tails during studies of alpha-particle effects. The absence of minority ions in direct electron heating (DEH) also allows the use of RF power modulation to deter… more

Date: July 1993

Creator: Murakami, M.; Jaeger, E. F. & Rasmussen, D. A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Theoretical aspects of throat-launch microwave heating in EBT-S

A simple radiation power balance model is used to gain insight into the role of antenna directivity and polarization control when throat launch is used to improve core-heating efficiency and to separate ring heating from core heating. Ray-tracing calculations are used to illustrate energy flow and absorption behavior for various throat-launch positions and angles.

Date: January 1, 1983

Creator: Batchelor, D. B.; Goldfinger, R. C.; Rasmussen, D. A. & Swain, D. W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Alternative oxide fuel pellet fabrication for irradiation testing. [LMFBR]

Fabrication of experimental breeder reactor fuel pellets by the common cold-press-and-sinter technique for irradiation testing in EBR-II is discussed. Fuel types include mixed thoria-plutonia, UO/sub 2/ enriched with 22 weight percent /sup 233/U in U, UO/sub 2/ enriched with thirty-four weight percent /sup 235/U in U, and mixed urania-plutonia.

Date: October 27, 1978

Creator: Rasmussen, D. E.; Jentzen, W. R. & McCord, R. B.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

ICRF heating on helical devices

Ion cyclotron range of frequency (ICRF) heating is currently in use on CHS and W7AS and is a major element of the heating planned for steady state helical devices. In helical devices, the lack of a toroidal current eliminates both disruptions and the need for ICRF current drive, simplifying the design of antenna structures as compared to tokamak applications. However the survivability of plasma facing components and steady state cooling issues are directly applicable to tokamak devices. Results… more

Date: September 1, 1995

Creator: Rasmussen, D.A.; Lyon, J.F. & Hoffman, D.J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Oxygen-to-metal ratio control during fabrication of mixed oxide fast breeder reactor fuel pellets

Oxygen-to-metal ratio (O/M) of mixed oxide fuel pellets can be controlled during fabrication by proper selection of binder (type and content) and sintering conditions. Sintering condition adjustments involved the passing of Ar--8% H/sub 2/ sintering gas across a cryostat ice bath controlled to temperatures ranging from -5 to -60/sup 0/C to control as-sintered pellet O/M ratio. As-sintered fuel pellet O/M decreased with increasing Sterotex binder and PuO/sub 2/ concentrations, increasing sinteri… more

Date: May 1, 1979

Creator: Rasmussen, D. E.; Benecke, M. W.; Jentzen, W. R. & McCord, R. B.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

308 Building Zone I stabilization and confinement

The 308 Building (Fast Flux Test Facility [FFTF] fuel supply) at the Hanford Site, located in Richland, Washington, is currently in transition to shutdown status. After shutdown, the facility will be maintained/surveilled and turned over to the U.S. Department of Energy (DOE) Office of Facility Transition and Management (EM-60) for utilization, remedial action, or decontamination and decommissioning (D&D). This may require that the facility be maintained in the shutdown mode for up to 30 years.… more

Date: October 1, 1993

Creator: Metcalf, I. L.; Schwartz, K. E.; Rich, J. W.; Benecke, M. W. & Rasmussen, D. E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Transport modeling of ECH (electron-cyclotron heating) and neutral-beam-heated plasmas in the Advanced Toroidal Facility

The report reviews the transport modeling of ECH heating and NBI heating in the ATF torsatron. Approximately steady-state plasmas are obtained with 200 kW of second harmonic ECH in ATF. Measured Thomson scattering T/sub e/ profiles, spectroscopic T/sub i/ values, stored energy, and spectroscopic emission levels may be reproduced with the predictive transport code PROCTR using a multi-pass ECH model and assuming neoclassical heat transport for both electrons (xie) and ions (xii). In addition, xi… more

Date: January 1, 1989

Creator: Howe, H. C.; Horton, L. D.; Crume, E. C.; Harris, J. H.; Isler, R. C.; Murakami, M. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Two frequency ICRF operation on TFTR

Modifications have been made recently to allow two of the ICRF antennas (bays L and M) on TFTR to operate at either of two frequencies, 43 MHz or 64 MHz. This was accomplished by lengthening the resonant loops (2{Lambda} at 43 MHz, 3{Lambda} at 64 MHz) and replacing the conventional quarter wave impedance transformers with a tapered impedance design. The other two antennas (bays K and N) will operate at a fixed frequency, 43 MHz. The two frequency operation will allow a combination of {sup 3}He… more

Date: April 1, 1993

Creator: Rogers, J. H.; Majeski, R.; Wilson, J. R.; Hosea, J. C.; Schilling, G.; Stevens, J. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Differential phase reflectometry for edge profile measurements on TFTR

Edge electron density profile measurements, including the scrape-off layer, have been made during ICRF heating with the two-frequency differential phase reflectometer installed in an ICRF antenna on TFTR. This system probes the plasma using the extraordinary mode with two signals swept from 90 to 118 GHz while maintaining a fixed difference frequency of 125 MHz. The extraordinary mode is used to obtain density profiles in the range of 1 {times} 10{sup 11} to 3 {times} 10{sup 13} cm{sup {minus}3… more

Date: June 1, 1994

Creator: Hanson, G. R.; Wilgen, J. B.; Bigelow, T. S.; England, A. C.; Murakami, M.; Rasmussen, D. A. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Ion Cyclotron Heating Experiments in EBT-S

Fast-wave heating and propagation experiments in the ion cyclotron range of frequencies (ICRF) have been carried out on EBT-S under steady-state conditions at power levels up to 20 kW and under pulsed conditions at power levels up to 100 kW. The waves were launched using a single Faraday-shielded loop antenna installed on the midplane of one of the 24 cavity sectors. Substantial ion heating was observed at frequencies above the second harmonic for hydrogen plasmas and at frequencies above the t… more

Date: January 1, 1982

Creator: Baity, F. W.; Davis, W. A.; Eldridge, O. C.; Glowienka, J. C.; Hillis, D. L.; Rasmussen, D. A. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Two frequency ICRF heating of D-T plasmas on TFTR

Modifications have been made to allow two of the ICRF antennas (bays L and M) on TFTR to operate at either of two frequencies, 43 MHz or 64 MHz. This was accomplished by lengthening the resonant loops feeding the antennas (2{lambda} at 43 MHz, 3{lambda} at 64 MHz) and replacing the conventional quarter wave impedance transformers with a tapered impedance design. The other two antennas (bays K and N) will operate at a fixed frequency, 43 MHz. The two frequency operation allows a combination of {… more

Date: November 1, 1993

Creator: Rogers, J. H.; Majeski, R.; Wilson, J. R.; Hosea, J. C.; Schilling, G.; Stevens, J. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department