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in subjects: "Pressurization"

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Low-background measurements of neutron emission from Ti metal in pressurized deuterium gas

A wide variety of neutron detector systems have been used at various research facilities to search for anomalous neutron emission from deuterated metals. Some of these detector systems are summarized here together with possible sources of spurious signals from electronic noise. During the past two years, we have performed experiments to measure neutron emission from pressurized D{sub 2} gas mixed with various forms of titanium metal chips and sponge. Details concerning the neutron detectors, ex… more

Date: January 1, 1991

Creator: Menlove, H. O.; Paciotti, M. A.; Claytor, T. N. & Tuggle, D. G.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Experimental results of direct containment heating by high-pressure melt ejection into the Surtsey vessel: The DCH-3 and DCH-4 tests

Two experiments, DCH-3 and DCH-4, were performed at the Surtsey test facility to investigate phenomena associated with a high-pressure melt ejection (HPME) reactor accident sequence resulting in direct containment heating (DCH). These experiments were performed using the same experimental apparatus with identical initial conditions, except that the Surtsey test vessel contained air in DCH-3 and argon in DCH-4. Inerting the vessel with argon eliminated chemical reactions between metallic debris … more

Date: August 1, 1991

Creator: Allen, M.D.; Pilch, M.; Brockmann, J.E.; Tarbell, W.W. (Sandia National Labs., Albuquerque, NM (United States)); Nichols, R.T. (Ktech Corp., Albuquerque, NM (United States)) & Sweet, D.W. (AEA Technology, Winfrith (United Kingdom))

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Final report on Weeks Island Monitoring Phase : 1999 through 2004.

This Final Report on the Monitoring Phase of the former Weeks Island Strategic Petroleum Reserve crude oil storage facility details the results of five years of monitoring of various surface accessible quantities at the decommissioned facility. The Weeks Island mine was authorized by the State of Louisiana as a Strategic Petroleum Reserve oil storage facility from 1979 until decommissioning of the facility in 1999. Discovery of a sinkhole over the facility in 1992 with freshwater inflow to the … more

Date: May 1, 2005

Creator: Ehgartner, Brian L. & Munson, Darrell Eugene

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Vacuum Systems Consensus Guideline for Department of Energy Accelerator Laboratories

Vacuum vessels, including evacuated chambers and insulated jacketed dewars, can pose a potential hazard to equipment and personnel from collapse, rupture due to back-fill pressurization, or implosion due to vacuum window failure. It is therefore important to design and operate vacuum systems in accordance with applicable and sound engineering principles. 10 CFR 851 defines requirements for pressure systems that also apply to vacuum vessels subject to back-fill pressurization. Such vacuum vessel… more

Date: September 9, 2008

Creator: Casey,R.; Haas, E.; Hseuh, H. C.; Kane, S.; Lessard, E.; Sharma, S. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Isothermal Martensitic and Pressure-Induced Delta to Alpha-Prime Phase Transformations in a Pu-Ga Alloy

A well-homogenized Pu-2 at.% Ga alloy can be retained in the metastable face-centered cubic {delta} phase at room temperature. Ultimately, this metastable {delta} phase will decompose via a eutectoid transformation to the thermodynamically stable monoclinic {alpha} phase and the intermetallic compound Pu{sub 3}Ga over a period of approximately 10,000 years [1]. In addition, these low solute-containing {delta}-phase Pu alloys are metastable with respect to an isothermal martensitic phase transfo… more

Date: January 18, 2008

Creator: Schwartz, A J; Wall, M A; Farber, D L; Moore, K T & Blobaum, K M

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Improved Oil Recovery from Upper Jurassic Smackover Carbonates through the Application of Advanced Technologies at Womack Hill Oil Field, Choctaw and Clarke Counties, Eastern Gulf Coastal Plain

Pruet Production Co. and the Center for Sedimentary Basin Studies at the University of Alabama, in cooperation with Texas A&M University, Mississippi State University, University of Mississippi, and Wayne Stafford and Associates proposed a three-phase, focused, comprehensive, integrated and multidisciplinary study of Upper Jurassic Smackover carbonates (Class II Reservoir), involving reservoir characterization and 3-D modeling (Phase I) and a field demonstration project (Phases II and III) … more

Date: December 31, 2003

Creator: Mancini, Ernest A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Heavy-Section Steel Technology Program fracture issues

Large-scale fracture mechanics tests have resulted in the identification of a number of fracture-technology issues. Identification of additional issues has come from the reactor vessel materials-irradiation test program and from reactor operating experience. This paper provides a review of fracture issues with an emphasis on their potential impact on a reactor vessel pressurized-thermal-shock (PTS) analysis. Mixed-mode crack propagation emerges as a major issue, due in large measure to the poor… more

Date: January 1, 1991

Creator: Pennell, W.E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Preliminary test results from the HSST shallow-crack fracture toughness program. [Heavy Section Steel Technology. A36, A517, and A533 B steels]

The Heavy Section Steel Technology (HSST) Program under sponsorship of the Nuclear Regulatory Commission (NRC) is investigating the influence of crack depth on the fracture toughness of reactor pressure vessel steel. The ultimate goal of the investigation is the generation of a limited data base of elastic-plastic fracture toughness values appropriate for shallow flaws in a reactor pressure vessel and the application of this data to reactor vessel life assessments. It has been shown that shallo… more

Date: January 1, 1991

Creator: Theiss, T.J.; Robinson, G.C. (Oak Ridge National Lab., TN (USA)) & Rolfe, S.T. (Kansas Univ., Lawrence, KS (USA). Dept. of Civil Engineering)

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Managing water addition to a degraded core

In this paper we present information that can be used in severe accident management by providing an improved understanding of the effects of water addition to a degraded core. This improved understanding is developed using a diagram showing a sequence of core damage states. Whenever possible, a temperature and a time after accident initiation are estimated for each damage state in the sequence diagram. This diagram can be used to anticipate the evolution of events during an accident. Possible r… more

Date: January 1, 1991

Creator: Kuan, P.; Hanson, D.J. (EG and G Idaho, Inc., Idaho Falls, ID (United States)) & Odar, F. (Nuclear Regulatory Commission, Washington, DC (United States))

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Improved Oil Recovery from Upper Jurassic Smackover Carbonates through the Application of Advanced Technologies at Womack Hill Oil Field, Choctaw and Clarke Counties, Eastern Gulf Costal Plain

Date: May 31, 2006

Creator: Mancini, Ernest A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Water injection as a means for reducing non-condensible andcorrosive gases in steam produced from vapor-dominated reservoirs

Large-scale water injection at The Geysers, California, hasgenerated substantial benefits in terms of sustaining reservoir pressuresand production rates, as well as improving steam composition by reducingthe content of non-condensible gases (NCGs). Two effects have beenrecognized and discussed in the literature as contributing to improvedsteam composition, (1) boiling of injectate provides a source of "clean"steam to production wells, and (2) pressurization effects induced byboiling of injected… more

Date: January 8, 2007

Creator: Pruess, Karsten; Spycher, Nicolas & Kneafsey, Timothy J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Benchmarking and Equipment and Controls Assessment for a 'Big Box' Retail Chain

The paper describes work to enable improved energy performance of existing and new retail stores belonging to a national chain and thereby also identify measures and tools that would improve the performance of 'big box' stores generally. A detailed energy simulation model of a standard store design was developed and used to: (1) demonstrate the benefits of benchmarking the energy performance of retail stores of relatively standard design using baselines derived from simulation, (2) identify cos… more

Date: June 11, 2008

Creator: Haves, Philip; Coffey, Brian & Williams, Scott

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

DEFORMATION OF SCORIA CONE BY CONDUIT PRESSURIZATION

A simplified mechanical model is used to simulate the deformation of a scoria cone due to pressurization of magma in a feeder conduit. The scoria cone is modeled as consisting of a cone of stabilized scoria with an axial region of loose scoria (height h{sub 1}), all overlying a vertically oriented cylindrical conduit intruded into rhyolite tuff country rock. For our analyses, the conduit is filled with basalt magma, usually with the upper length (h{sub 2}) solidified. The style of deformation o… more

Date: August 26, 2005

Creator: Gaffney, E.S.; Damjanac, B.; Krier, D. & Valentine, G.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

L AREA WASTEWATER STORAGE DRUM EVALUATION

This report documents the determination of the cause of pressurization that led to bulging deformation of a 55 gallon wastewater drum stored in L-Area. Drum samples were sent to SRNL for evaluation. The interior surface of these samples revealed blistering and holes in the epoxy phenolic drum liner and corrosion of the carbon steel drum. It is suspected that osmotic pressure drove permeation of the water through the epoxy phenolic coating which was weakened from exposure to low pH water. The co… more

Date: November 30, 2007

Creator: Vormelker, P; Cynthia Foreman, C; Zane Nelson, Z; David Hathcock, D & Dennis Vinson, D

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Tensile Hoop Behavior of Irradiated Zircaloy-4 Nuclear Fuel Cladding

A method for evaluating the room temperature ductility behavior of irradiated Zircaloy-4 nuclear fuel cladding has been developed and applied to evaluate tensile hoop strength of material irradiated to different levels. The test utilizes a polyurethane plug fitted within a tubular cladding specimen. A cylindrical punch is used to compress the plug axially, which generates a radial displacement that acts upon the inner diameter of the specimen. Position sensors track the radial displacement of t… more

Date: March 1, 2007

Creator: Jaramillo, Roger A; Hendrich, WILLIAM R & Packan, Nicolas H

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Structural response of reactor-core hexcan subassemblies subjected to dynamic overpressurization under accident conditions

This paper presents a two-dimensional structural analysis for the evaluation of a single core subassembly due to internal overpressure associated with possible failure of fuel pins having high fission gas plenum pressure. Structural models are developed for the subassemblies and their surroundings with emphasis on the critical physical aspects of the problem. With these models the strains, deformations and the extent of permanent damage (plastic strain) to the subassemblies can be assessed. The… more

Date: January 1, 1993

Creator: Pfeiffer, P.A. & Kulak, R.F.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Rupture of plutonium oxide storage container, March 13, 1979

On March 13, 1979, a plutonium oxide storage can ruptured in the 303-C storage facility, which is in the 300 Area of the Hanford Site, Washington. The facility is operated by the Pacific Northwest Laboratory (PNL); three PNL staff members were performing the storage operation. No injuries to these staff members resulted from the occurrence. A Class C Investigation Committee was appointed on March 14, 1979, by the Director, PNL. Subsequently, when the loss estimates became available, the Manager… more

Date: May 29, 1979

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Studies on coal devolatilization and char reactivity under PFBC conditions

A fundamental combustion study was performed at Babcock and Wilcox's Alliance Research Center to characterize the combustion properties of Pittsburgh No. 8 and Texas lignite coals under conditions simulating pressurized fluidized-bed combustion (PFBC) using a bench-scale reactor. Over 400 combustion tests were performed at temperatures ranging from 1425{degree} to 1,725{degree}F, a maximum pressure of 280 psig, maximum superficial gas velocities of approximately 5 ft/sec to 20 ft/sec, and sever… more

Date: December 1, 1990

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Potential impact of enhanced fracture-toughness data on fracture mechanics assessment of PWR vessel integrity for pressurized thermal shock

The Heavy Section Steel Technology (HSST) Program is involved with the generation of enhanced fracture-initiation toughness and fracture-arrest toughness data of prototypic nuclear reactor vessel steels. These two sets of data are enhanced because they have distinguishing characteristics that could potentially impact PWR pressure vessel integrity assessments for the pressurized-thermal shock (PTS) loading condition which is a major plant-life extension issue to be confronted in the 1990's. A se… more

Date: January 1, 1991

Creator: Dickson, T.L. & Theiss, T.J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Modeling of gaseous sup 14 CO sub 2 release from perforations in spent fuel disposal containers

The potential release of gaseous {sup 14}CO{sub 2} from small perforations in spent fuel containers has been evaluated as a function of temperature, hole size, effective porosity of corrosion products within the hole, and time, based on the waste package design parameters and environmental conditions described in the Yucca Mountain Site Characterization Report (SCP). The SCP does not specify initial fill gas (argon) pressure and temperature. It is shown that, if significant {sup 14}C oxidation … more

Date: November 1, 1991

Creator: Pescatore, C. & Sullivan, T.M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Development of pressurized tube specimen for creep testing of beryllium

The purpose of this work was to demonstrate that creep tests could be performed on beryllium in the same pressurized tube geometry as is commonly used in the FFTF/MOTA.

Date: December 1, 1990

Creator: Neef, W.S.; Moir, R.W. (Lawrence Livermore National Lab., CA (USA)); Opperman, E.K. (Westinghouse Hanford Co., Richland, WA (USA)) & Hamilton, M.L. (Pacific Northwest Lab., Richland, WA (USA))

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

A fixed granular-bed sorber for measurement and control of alkali vapors in PFBC (pressurized fluidized-bed combustion)

Alkali vapors (Na and K) in the hot flue gas from the pressurized fluidized-bed combustion (PFBC) of coal could cause corrosion problems with the gas turbine blades. In a laboratory-scale PFBC test with Beulah lignite, a fixed granular bed of activated bauxite sorbent was used to demonstrate its capability for measuring and controlling alkali vapors in the PFBC flue gas. The Beulah lignite was combusted in a bed of Tymochtee dolomite at bed temperatures ranging from 850 to 875{degrees}C and a s… more

Date: January 1, 1990

Creator: Lee, S.H.D. & Swift, W.M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Gas generation from low-level radioactive waste: Concerns for disposal

The Advisory Committee on Nuclear Waste (ACNW) has urged the Nuclear Regulatory Commission (NRC) to reexamine the topic of hydrogen gas generation from low-level radioactive waste (LLW) in closed spaces to ensure that the slow buildup of hydrogen from water-bearing wastes in sealed containers does not become a problem for long-term safe disposal. Brookhaven National Laboratory (BNL) has prepared a report, summarized in this paper, for the NRC to respond to these concerns. The paper discusses th… more

Date: January 1, 1992

Creator: Siskind, B.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Hot gas cleanup and gas turbine aspects of an advanced PFBC power plant

The overall objective of the second-generation PFBC development program is to advance this concept to a commercial status. Three major objectives of the current Phase 2 program activities are to: Separately test key components of the second-generation PFBC power plant at sub-scale to ascertain their performance characteristics, Revise the commercial plant performance and economic predictions where necessary, Prepare for a 1.6 MWe equivalent Phase 3 integrated subsystem test of the key component… more

Date: January 1, 1992

Creator: Robertson, A.; Newby, R. A.; Alvin, M. A.; Bachovchin, D. M.; Bruck, G. J. & Smeltzer, E. E.

Item Type: Article

Partner: UNT Libraries Government Documents Department