515 Matching Results

Search Results

Advanced search parameters have been applied.

in subjects: "Liners"

open access

Milliwatt Generator Project

This report covers progress on the Milliwatt Generator Project from April 1986 through March 1988. Activities included fuel processing and characterization, production of heat sources, fabrication of pressure-burst test units, compatibility studies, impact testing, and examination of surveillance units. The major task of the Los Alamos Milliwatt Generator Project is to fabricate MC2893A heat sources (4.0 W) for MC2730A radioisotope thermoelectric generators (RTGS) and MC3599 heat sources (4.5 W… more

Date: May 1, 1992

Creator: Latimer, T.W. & Rinehart, G.H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Alternate materials of construction for geothermal applications. Progress report No. 14, July--September 1977

A program to determine if non-metallic materials such as polymers, concrete polymer composites, and refractory cements can be utilized as materials of construction in geothermal processes is in progress. To date, several high temperature polymer concrete systems have been formulated, laboratory and field tests performed in brine, flashing brine, and steam at temperatures up to 260/sup 0/C (500/sup 0/F), and economic studies started. Laboratory data for exposure times > 2 years are available. Re… more

Date: September 1, 1977

Creator: Kukacka, L. E.; Fontana, J.; Zeldin, A.; Sugama, T.; Horn, W.; Carciello, N. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

MHD air heater development technology. Progress report, November 26, 1979-March 31, 1980

Work on the development of the directly-fired high temperature air heater (HTAH) for MHD power plants is reported. Progress is reported on three tasks: (1) materials selection, evaluation, and development, (2) operability, performance, and materials testing, and (3) full-scale design concepts. Under Task 1, efforts were carried out in several areas. Work on the computer data base for material properties was begun. Data were compiled for several HTAH materials. Materials selections for Valve Tes… more

Date: May 1, 1980

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Milliwatt generator project: Progress report, April 1983--March 1984

This report covers progress on the Milliwatt Generator Project during April 1983--March 1984. Activities included (plutonium 238 oxide) fuel processing and characterization, production of heat sources, fabrication of pressure-burst test units, compatibility studies, impact testing, examination of surveillance units, Inconel weld development, and qualilty assurance.

Date: May 1, 1988

Creator: Rinehart, G.H. & Latimer, T.W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Thermal responses of tokamak reactor first walls during cyclic plasma burns

The CINDA-3G computer code has been adapted to analyze the thermal responses and operating limitations of two fusion reactor first-wall concepts under normal cyclic operation. A component of an LMFBR computer has been modified and adapted to analyze the ablative behavior of first-walls after a plasma disruption. The first-wall design concepts considered are a forced-circulation water-cooled stainless steel panel with and without a monolithic graphite liner. The thermal gradients in the metal wa… more

Date: January 1, 1977

Creator: Smith, D. L. & Charak, I.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Wall power measurements of impurity radiation in ORMAK

Time-resolved measurements of the power loss to the ORMAK liner were made using a pyroelectric detector. These measurements indicate that a large, relatively constant fraction (approximately 60 percent) of the electron power input is lost to the liner, rather than to the limiter, over a wide range of input powers (ohmic heating + neutral beam injection) and plasma conditions, and for most of the discharge duration. Most of this energy loss is due to impurity radiation peaked at about a third of… more

Date: January 1, 1977

Creator: Bush, C. E. & Lyon, J. F.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Improvement of the mechanical reliability of monolithic refractory linings for coal gasification process vessels. Final report

Eighteen heat-up tests were run on nine standard and experimental dual component monolithic refractory concrete linings. These tests were run with a five foot diameter by 14-ft high Pressure Vessel/Test Furnace designed to accommodate a 12-inch thick by 5-ft high refractory lining, heat the hot face to 2000/sup 0/F and expose the lining to air or steam pressures up to 150 psig. Results obtained from standard type linings in the test facility indicated that lining degradation duplicated that obs… more

Date: September 1, 1981

Creator: Potter, R.A. (comp.)

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Thermoelastic buckling of plates in a cylindrical geometry against an elastic back support. [LMFBR]

A plate which is fixed at its edges to a strong edge support structure will develop large compressive stresses when heated from ambient temperature more rapidly than the support structure. Determining the response of the plate to this situation requires stability analysis to ascertain whether the plate might buckle, or whether the constrained thermal expansion will lead to compressive stresses exceeding the yield point because it did not buckle. A special case is considered here, both analytica… more

Date: January 1, 1980

Creator: Simmons, L. D. & Wierman, R. W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Nuclear waste management. Semiannual progress report, April 1983-September 1983

The status of the following programs is reported: waste stabilization; waste isolation; low-level waste management; remedial action; and supporting studies. 58 figures, 39 tables.

Date: January 1, 1984

Creator: McElroy, J.L. & Powell, J.A. (comps.)

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

First wall thermal hydraulic models for fusion blankets

Subject to normal and off-normal reactor conditions, thermal hydraulic models of first walls, e.g., a thermal mass barrier, a tubular shield, and a radiating liner are reviewed. Under normal operation the plasma behaves as expected in a predicted way for transient and steady-state conditions. The most severe thermal loading on the first wall occurs when the plasma becomes unstable and dumps its energy on the wall in a very short period of time (milliseconds). Depending on the plasma dump time a… more

Date: January 1, 1980

Creator: Fillo, J A

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Downhole steam generation: material studies

One enhanced oil recovery technique for extracting heavy crude from deep reservoirs by steam at the bottom of an injection well. Development of a downhole steam generator that will produce steam and inject it into formations at depths greater than 2500 feet is one objective of a Department of Energy/Sandia National Laboratories development effort - Project DEEP STEAM. Extensive material studies have been performed in support of Project DEEP STEAM; current efforts are devoted primarily to the se… more

Date: January 1, 1982

Creator: Beauchamp, E.K.; Weirick, L.J. & Muir, J.F.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Thermodynamic study of the MWG system/components and measurement of the oxygen partial pressure in the heat source capsule

A thermodynamic study of the Milliwatt Generator heat source capsule was performed to determine the effects of the oxide fuel on container materials at elevated temperatures in order to evaluate the factors affecting embrittlement of T-111 alloy. The study indicates that relatively slow oxidation of the T-111 of the capsule occurs during pretreatment. Yttrium added to the /sup 238/PuO/sub 2/ fuel charge is functioning in its designed role as an oxygen getter and is stabilizing at an O/Pu ratio … more

Date: June 23, 1980

Creator: David, D.J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Evaluation of refractory materials for a nuclear waste incinerator

An experiment to find a suitable refractory lining for a nuclear waste incinerator has been completed. Eleven brick and six castable products were analyzed by optical and scanning microscopy. All the materials were fashioned into cup shapes and subjected to temperatures ranging from 800 to 1200/sup 0/C for as long as six weeks. Some of the cups were charged weekly with pellets made from ash materials that would contact an incinerator liner. Refractory products containing a high percentage of al… more

Date: July 21, 1980

Creator: Grotzky, V. K.; Kneale, P. A. & Teter, A. R.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Alternate materials of construction for geothermal applications. Progress report No. 13, April--June 1977

A program to determine if non-metallic materials such as polymers, concrete polymer composites, and refractory cements can be utilized as materials of construction in geothermal processes is in progress. To date, several high temperature polymer concrete systems have been formulated, laboratory and field tests performed in brine, flashing brine, and steam at temperatures up to 260/sup 0/C, and economic studies started. Laboratory data for exposure times greater than 2 years are available. Resul… more

Date: June 1, 1977

Creator: Steinberg, M. & Kukacka, L. E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Mechanical design of the Tandem Mirror Experiment Upgrade vacuum system

The Tandem Mirror Experiment Upgrade (TMX Upgrade) vacuum system uses most of the vacuum system from the original TMX and substantially increases its capabilities. The vacuum system provides the main structure for the experimental apparatus, as well as providing and maintaining the vacuum environment. The vacuum vessel provides the structure supporting all magnets, as they are contained inside the vacuum vessel, all of the neutral-beam injectors, and the various diagnostics. The vessel provides… more

Date: September 24, 1981

Creator: Lang, D. D.; Calderon, M. O.; Thomas, S. R. & Garner, D. R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

LASL fast liner experiment

The LASL Fast Liner Experiment explores a fusion concept in which a prepared plasma is adiabatically compressed to thermonuclear temperatures and densities by a rapidly imploding solid metal liner. A prepared plasma having ..beta.. > 1 is in contact with the liner and end plugs, and contains an embedded magnetic field to inhibit thermal conduction. Cylindrical liners are magnetically imploded by a large axial current carried in the liner shell. Theoretical estimates indicate an implosion veloci… more

Date: January 1, 1980

Creator: Sherwood, A. R.; Cantrell, E. L.; Henins, I.; Hoida, H. W.; Jarboe, T. R.; Malone, R. C. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Evaluation of selected chemical processes for production of low-cost silicon: Phase III. Silicon Material Task, Low-Cost Solar Array Project. Sixteenth/seventeenth quarterly progress report, July-December 31, 1979

The method under development for the production of semiconductor grade silicon is based on the zinc vapor reduction of silicon tetrachloride in a fluidized bed of seed particles. Construction of the PDU was completed during the report period, the fluidized-bed reactor was coated internally with silicon/SiC, and the operation of several systems was checked out. However, problems with the zinc feed system, unrelated to its basic operability, delayed introduction of zinc vapor to the PDU. At the e… more

Date: March 7, 1980

Creator: Blocher, J.M. Jr. & Browning, M.F.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Effects of alternate fuels. Report No. 2. Analysis of basic refractories degraded by residual oil combustion products

Industrial conversion in the U.S. to alternate fuels from natural gas is presently under way and will accelerate rapidly as a result of gas curtailments and National policy considerations. Currently the prime alternate fuels are distillate and residual oils and coal. Conversion to residual oils or coal for high-temperature process heat applications is anticipated to result in accelerated refractory and insulation corrosion and degradation due to reactions between fuel impurities and the ceramic… more

Date: February 1, 1978

Creator: Wei, G. C. & Tennery, V. J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Liner-concrete heat transfer study for nuclear power plant containments. [BWR; PWR]

Containment liner-concrete interface heat transfer phenomena are investigated. In particular, the effects of thermal radiation and natural convection heat transfer as well as the effects of anchors on the liner-concrete conductance are studied. The need for a thorough structural analysis to determine the spatial distribution of the gap between the liner and concrete has been found to be necessary before the liner-concrete conductance can be accurately defined. A reasonable minimum value for a o… more

Date: January 1, 1978

Creator: Gido, R.G.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

SUMP MEASURING SYSTEM

The process sumps in H-Canyon at the Savannah River Site (SRS) collect leaks from process tanks and jumpers. To prevent build-up of fissile material the sumps are frequently flushed which generates liquid waste and is prone to human error. The development of inserts filled with a neutron poison will allow a reduction in the frequency of flushing. Due to concrete deterioration and deformation of the sump liners the current dimensions of the sumps are unknown. Knowledge of these dimensions is nec… more

Date: November 26, 2007

Creator: Vrettos, N; Athneal Marzolf, A; Casandra Robinson, C; James Fiscus, J; Daniel Krementz, D & Thomas Nance, T

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

PCC2005 Sample

Considered herein is a process concept that integrates fly ash amendment of brine produced as a result of oil and gas extraction with subsequent sequestration of carbon dioxide in the resulting alkaline solution. The CO2 solubility-trapping capacity of the alkaline mixture is substantially greater than that of the acidic raw brine. In addition to pH adjustment, addition of CaO-rich combustion byproduct augments the concentration of Ca++ cations initially present in the brine to increase solutio… more

Date: September 1, 2005

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Surface selective membranes for carbon dioxide separation

In this study, hybrid membranes have been developed for the selective separation of CO2 from mixtures containing H2. Beginning with commercially available Pall alumina membrane tubes with nominal pore diameter of 5 nm, hybrids were produced by silation with a variety of functionalities designed to facilitate the selective adsorption of CO2 onto the pore surface. The goal is to produce a membrane which can harness the power of surface diffusion to give the selectivity of polymer membranes with t… more

Date: September 1, 2005

Creator: Luebke, David R.; Pennline, Henry W. & Myers, Christina R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Low-Chrome/Chrome Free Refractories for Slagging Gasifiers

Gasifiers are containment vessels used to react carbon-containing materials with oxygen and water, producing syngas (CO and H2) that is used in chemical and power production. It is also a potential source of H2 in a future hydrogen economy. Air cooled slagging gasifiers are one type of gasifier, operating at temperatures from 1275-1575º C and at pressures of 400 psi or higher. They typically use coal or petroleum coke as the carbon source, materials which contain ash impurities that liquefy at … more

Date: January 1, 2007

Creator: Bennett, J.P.; Kwong, K.-S.; Powell, C.P.; Thomas, H. & Petty, A.V., Jr.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

LIFE ESTIMATION OF HIGH LEVEL WASTE TANK STEEL FOR F-TANK FARM CLOSURE PERFORMANCE ASSESSMENT

High level radioactive waste (HLW) is stored in underground storage tanks at the Savannah River Site. The SRS is proceeding with closure of the 22 tanks located in F-Area. Closure consists of removing the bulk of the waste, chemical cleaning, heel removal, stabilizing remaining residuals with tailored grout formulations and severing/sealing external penetrations. A performance assessment is being performed in support of closure of the F-Tank Farm. Initially, the carbon steel construction materi… more

Date: October 1, 2007

Creator: Subramanian, K

Item Type: Report

Partner: UNT Libraries Government Documents Department