Residual stress effects in containment analysis. (open access)

Residual stress effects in containment analysis.

The manufacturing of steel containment vessels starts with the forming of flat plates into curved plates. A steel containment structure is made by welding individual plates together to form the sections that make up the complex shaped vessels. The metal forming and welding process leaves residual stresses in the vessel walls. Generally, the effect of metal forming residual stresses can be reduced or virtually eliminated by thermally stress relieving the vessel. In large containment vessels this may not be practical and thus, the residual stresses due to manufacturing may become important. The residual stresses could possibly affect the response of the vessel to internal pressurization. When the level of residual stresses is significant it will affect the vessel's response, for instance the yielding pressure and possibly the failure pressure. This paper will address the effect of metal forming residual stresses on the response of a generic pressure vessel to internal pressurization. A scoping analysis investigated the effect of residual forming stresses on the response of an internally pressurized vessel. A simple model was developed to gain understanding of the mechanics of the problem. Residual stresses due to the welding process were not considered in this investigation.
Date: April 24, 1998
Creator: Pfeiffer, P. A.
Object Type: Article
System: The UNT Digital Library
Development of GaAs-Based Monolithic Surface Acoustic Wave Devices for Chemical Sensing and RF Filter Applications (open access)

Development of GaAs-Based Monolithic Surface Acoustic Wave Devices for Chemical Sensing and RF Filter Applications

Since their invention in the mid-1960's, surface acoustic wave (SAW) devices have become popular for a wide variety of applications. SAW devices represent a low-cost and compact method of achieving a variety of electronic signal processing functions at high frequencies, such as RF filters for TV or mobile wireless communications [1]. SAW devices also provide a convenient platform in chemical sensing applications, achieving extremely high sensitivity to vapor phase analytes in part-per-billion concentrations [2]. Although the SAW acoustic mode can be created on virtually any crystalline substrate, the development of SAW technology has historically focused on the use of piezoelectric materials, such as various orientations of either quartz or lithium niobate, allowing the devices to be fabricated simply and inexpensively. However, the III-V compound semiconductors, and GaAs in particular, are also piezoelectric as a result of their partially covalent bonding and support the SAW acoustic mode, allowing for the convenient fabrication of SAW devices. In addition, GaAs microelectronics has, in the past decade, matured commercially in numerous RF wireless technologies. In fact, GaAs was recognized long ago as a potential candidate for the monolithic integration of SAW devices with microelectronics, to achieve compact RF signal processing functions [3]. The details …
Date: December 24, 1998
Creator: Baca, A. G.; Casalnuovo, S. A.; Drummond, T. J.; Frye, G. C.; Heller, E. J.; Hietala, V. M. et al.
Object Type: Article
System: The UNT Digital Library
Regenerative fuel cell systems R{ampersand}D (open access)

Regenerative fuel cell systems R{ampersand}D

The LLNL effort to develop electrochemical energy storage systems occupies a crucial regime in the hydrogen technologies` adoption process, between pure research/conceptual feasibility and near-term demonstrations of commercial systems This effort leaves as many component innovations as possible to others, and seeks to integrate the best systems from the highest performance, readily procurable components. The integration research and component testing being undertaken has already uncovered many operational and design issues that might hinder the adoption of breakthrough technologies being funded by the DOE and NASA A focus on delivering energy storage to the most weight-sensitive applications (aircraft and spacecraft) ensures that key technologies will be properly implemented and combined to perform in real, upcoming vehicle tests. The two key technologies that LLNL is aggressively implementing are proton exchange membrane (PEM) -based RFCs and high-performance tankage for storing compressed hydrogen and oxygen gases Tankage built from available technologies must be lightweight and must cope with volume penalties, gas permeation, and moisture handling to adequately furnish the breakthrough levels of specific energy that RFC systems offer Such multidisciplinary specifications have yet to be combined in the form of a commercial product. Were it not fat LLNL`s role as integrator leading industry, and …
Date: June 24, 1998
Creator: Mitlitsky, F.; Myers, B. & Weisberg, A. H.
Object Type: Article
System: The UNT Digital Library
Tau appearance in atmospheric neutrino interactions (open access)

Tau appearance in atmospheric neutrino interactions

If the correct interpretation of the Super-Kamiokande atmospheric neutrino data is {nu}{sub {mu}} {yields} {nu}{sub {tau}} oscillation, the contained data sample should already have more than 10 {tau} appearance events. We study the challenging task of detecting the {tau}, focusing on the decay chain {tau}{sup {+-}} {yields} {rho}{sup {+-}} {yields} {pi}{sup {+-}}{pi}{sup 0} in events with quasi-elastic {tau} production. The background level, which is currently quite uncertain because of a lack of relevant neutral current data, can be measured by the near detector in the K2K experiment. Our estimates of the background suggest that it may be possible to detect {tau} appearance in Super-Kamiokande with 5-10 years of running.
Date: October 24, 1998
Creator: Hall, Lawrence J. & Murayama, Hitoshi
Object Type: Article
System: The UNT Digital Library
Insurance payment process for HANDI 2000 business management system (open access)

Insurance payment process for HANDI 2000 business management system

The Pensions and Savings group handles three types of payment into and out of Fluor Daniel Hanford related to insurance benefits: Premium payment to insurance company; Application of employee insurance withholding against insurance costs; Remittance of insurance claims, and administrative fees. General approach in making and recording the remittance is by forwarding payment information to Accounts Payable Master.
Date: August 24, 1998
Creator: Wilson, D.
Object Type: Report
System: The UNT Digital Library
Project W-320, 241-C-106 sluicing civil/structural calculations, Volume 7 (open access)

Project W-320, 241-C-106 sluicing civil/structural calculations, Volume 7

The structural skid supporting the Process Building and equipment is designed based on the criteria, codes and standards, referenced in the calculation. The final members and the associated elements satisfy the design requirements of the structure. Revision 1 incorporates vendor data for the weight of the individual equipment components. The updated information does not affect the original conclusion of the calculation, since the overall effect is a reduction in the total weight of the equipment and a nominal relocation of the center of gravity for the skid assembly.
Date: July 24, 1998
Creator: Bailey, J. W.
Object Type: Report
System: The UNT Digital Library
Improving ion beam injector performance by augmenting capacitance of vacuum diode (open access)

Improving ion beam injector performance by augmenting capacitance of vacuum diode

The recirculating induction accelerator is a new class of particle accelerator being developed at LLNL as a reduced-cost driver for heavy-ion beam driven inertial fusion energy. Ongoing research and development of advanced beam control technologies for the recirculator system requires a very stable and reproducible ion beam source. The injector pulse modulator must be capable of producing very precise high-voltage pulses in order to reduce the current modulation instability and achieve the required beam reproducibility. Computer modeled simulations of beam dynamics have established that errors greater than 0.1 percent in the flatness of the 120 kV injector pulse can create intolerable energy deviations. The pulse modulator that was developed to satisfy the stringent requirements is described in the accompanying paper by Wilson [1]. A crucial aspect of the overall solution is a modification made to the vacuum diode apparatus, whereby high-voltage capacitors were added in close proximity to the thermionic potassium-ion emitter. This paper discusses the rationale for augmenting the normally small capacitance of the injector diode, and presents design information, including an illustrated layout, electrostatic field modeling results, and data on ceramic capacitors operating at elevated levels.
Date: June 24, 1998
Creator: Goerz, D. A., LLNL
Object Type: Article
System: The UNT Digital Library
Tank waste remediation system immobilized high-level waste storage project configuration management implementation plan (open access)

Tank waste remediation system immobilized high-level waste storage project configuration management implementation plan

This Configuration Management Implementation Plan was developed to assist in the management of systems, structures, and components, to facilitate the effective control and statusing of changes to systems, structures, and components; and to ensure technical consistency between design, performance, and operational requirements. Its purpose is to describe the approach Project W-464 will take in implementing a configuration management control, to determine the rigor of control, and to identify the mechanisms for imposing that control.This Configuration Management Implementation Plan was developed to assist in the management of systems, structures, and components, to facilitate the effective control and statusing of changes to systems, structures, and components; and to ensure technical consistency between design, performance, and operational requirements. Its purpose is to describe the approach Project W-464 will take in implementing a configuration management control, to determine the rigor of control, and to identify the mechanisms for imposing that control.
Date: September 24, 1998
Creator: Burgard, K.G.
Object Type: Report
System: The UNT Digital Library
Project W-320, 241-C-106 sluicing: Piping calculations. Volume 8 (open access)

Project W-320, 241-C-106 sluicing: Piping calculations. Volume 8

This supporting document has been prepared to make the FDNW calculations for Project W-320 readily retrievable. The objective of this calculation is to perform the hydraulic analysis on the slurry line and the supernate line for W-320. This calculation will use the As-Built conditions of the slurry line and the supernate line. Booster Pump Curves vs System Curves shall be generated for the supernate system and the slurry system.
Date: July 24, 1998
Creator: Bailey, J. W.
Object Type: Report
System: The UNT Digital Library
Waste feed delivery program systems engineering implementation plan (open access)

Waste feed delivery program systems engineering implementation plan

This document defines the systems engineering processes and products planned by the Waste Feed Delivery Program to develop the necessary and sufficient systems to provide waste feed to the Privatization Contractor for Phase 1. It defines roles and responsibilities for the performance of the systems engineering processes and generation of products.
Date: September 24, 1998
Creator: O`Toole, S.M.
Object Type: Report
System: The UNT Digital Library
Estimated dose to in-tank equipment: Phase 1 waste feed delivery (open access)

Estimated dose to in-tank equipment: Phase 1 waste feed delivery

This analysis estimates the radiation dose to the equipment that will be submerged in double-shell tank waste. The results of this analysis are intended to be the basis for specifications for in-tank equipment. The scope of this analysis is limited to the new equipment required for the delivery of waste feed to Phase 1 private contractors. Phase 1 refers to the first of a two-phase plan to privatize the remediation of Hanford`s tank waste. The focus of this analysis is on waste feed delivery because of the extraordinarily high cost of any failure that would lead to the interruption of a steady flow of feed to the private contractors.
Date: February 24, 1998
Creator: Claghorn, R. D.
Object Type: Report
System: The UNT Digital Library
Environmental Effects in Advanced Intermetallics (open access)

Environmental Effects in Advanced Intermetallics

This paper provides a comprehensive review of environmental embrittlement in iron and nickel aluminizes. The embrittlement involves the interaction of these intermetallics with moisture in air and generation of atomic hydrogen, resulting in hydrogen-induced embrittlement at ambient temperatures. Environmental embrittlement promotes brittle grain-boundary fracture in Ni{sub 3}Al alloys but brittle cleavage fracture in Fe{sub 3}Al-FeAl alloys. The embrittlement strongly depends on strain rate, with tensile-ductility increase with increasing strain rate. It has been demonstrated that environmental embrittlement can be alleviated by alloying additions, surface modifications, and control of grain size and shape. Boron tends to segregate strongly to grain boundaries and is most effective in suppressing environmental embrittlement in Ni{sub 3}Al alloys. The mechanistic understanding of alloy effects and environmental embrittlement has led to the development of nickel and iron aluminide alloys with improved properties for structural use at elevated temperatures in hostile environments.
Date: November 24, 1998
Creator: Liu, C.T.
Object Type: Article
System: The UNT Digital Library
Budget for HANDI 2000 business management system (open access)

Budget for HANDI 2000 business management system

The major projects have been directed to schedule work activities with Primavera (P3). Previously, project budgets were developed and resourced within the P3 Primavera scheduling system, the PX scheduling system and other spreadsheet tools. These budgets for the execution year were then loaded manually into the system and other spreadsheet tools. These budgets for the execution year were then loaded manually into the Financial Data System. The closing process currently consists of the running of a preliminary close on the first working day following the last day of the fiscal month. The year end close is run with several preliminary closes prior to fiscal year end with a hard close predicated on receipt of a final obligation letter from DOE.
Date: August 24, 1998
Creator: Wilson, D.
Object Type: Report
System: The UNT Digital Library
Closing procedure for HANDI 2000 business management system (open access)

Closing procedure for HANDI 2000 business management system

The closing process currently consists of the running of a preliminary close on the first working day following the last day of the fiscal month. The year end close is run with several preliminary closes prior to fiscal year end with a hard close predicated on receipt of a final obligation letter from DOE.
Date: August 24, 1998
Creator: Wilson, D.
Object Type: Report
System: The UNT Digital Library
Acceptance test report for portable exhauster POR-008/Skid F (open access)

Acceptance test report for portable exhauster POR-008/Skid F

Portable Exhauster POR-008 was procured via HNF-0490, Specification for a Portable Exhausted System for Waste Tank Ventilation. Prior to taking ownership, acceptance testing was performed at the vendors. However at the conclusion of testing a number of issues remained that required resolution before the exhausters could be used by Project W-320. The purpose of acceptance testing documented by this report was to demonstrate compliance of the exhausters with the performance criteria established within HNF-O49O, Rev. 1 following a repair and upgrade effort at Hanford. In addition, data obtained during this testing is required for the resolution of outstanding Non-conformance Reports (NCR), and finally, to demonstrate the functionality of the associated software for the pressure control and high vacuum exhauster operating modes provided for by W-320. Additional testing not required by the ATP was also performed to assist in the disposition and close out of receiving inspection report and for application design information (system curve). Results of this testing are also captured within this document.
Date: July 24, 1998
Creator: Kriskovich, J.R.
Object Type: Report
System: The UNT Digital Library
Statement of work for the immobilized high-level waste transportation system, Project W-464 (open access)

Statement of work for the immobilized high-level waste transportation system, Project W-464

The objective of this Statement of Work (SOW) is to present the scope, the deliverables, the organization, the technical and schedule expectations for the development of a Package Design Criteria (PDC), cost and schedule estimate for the acquisition of a transportation system for the Immobilized High-Level Waste (IHLW). This transportation system which includes the truck, the trailer, and a shielded cask will be used for on-site transportation of the IHLW canisters from the private vendor vitrification facility to the Hanford Site interim storage facility, i.e., vaults 2 and 3 of the Canister Storage Building (CSB). This Statement of Work asks Waste Management Federal Services, Inc., Northwest Operations, to provide Project W-464 with a Design Criteria Document, plus a life-cycle schedule and cost estimate for the acquisition of a transportation system (shielded cask, truck, trailer) for IHLW on-site transportation.
Date: June 24, 1998
Creator: Mouette, P.
Object Type: Report
System: The UNT Digital Library
Electron heat transport in improved confinement discharges in DIII-D (open access)

Electron heat transport in improved confinement discharges in DIII-D

In DIII-D tokamak plasmas with an internal transport barrier (ITB), the comparison of gyrokinetic linear stability (GKS) predictions with experiments in both low and strong negative magnetic shear plasmas provide improved understanding for ion and electron thermal transport within much of the plasma. As previously reported, the region for improved ion transport seems well characterized by the condition OE~B>Y-, where SERB is the ExB flow shear, calculated from measured quantities, and y,, is the maximum linear growth rate for ion temperature gradient (ITG) modes in the absence of flow shear. Within a limited region just inside the ITB, the electron temperature gradient (ETG) modes appear to control the electron temperature gradient and, consequently, the electron thermal transport. The increase in electron temperature gradient with more strongly negative magnetic shear is consistent with the increase in the ETG mode marginal gradient. Closer to the magnetic axis the Te profile flattens and the ETG modes are predicted to be stable. With additional core electron heating, FIR scattering measurements near the axis show the presence of high k fluctuations (12 cm-l), rotating in the electron diamagnetic drift direction. This turbulence could impact electron transport and possibly also ion transport. Thermal diffusivities for electrons, …
Date: November 24, 1998
Creator: Stallard, B. W.
Object Type: Article
System: The UNT Digital Library
System integration test plan for HANDI 2000 business management system (open access)

System integration test plan for HANDI 2000 business management system

This document presents the system integration test plan for the Commercial-Off-The-Shelf, PassPort and PeopleSoft software, and custom software created to work with the COTS products. The PP software is an integrated application for AP, Contract Management, Inventory Management, Purchasing and Material Safety Data Sheet. The PS software is an integrated application for Project Costing, General Ledger, Human Resources/Training, Payroll, and Base Benefits.
Date: August 24, 1998
Creator: Wilson, D.
Object Type: Report
System: The UNT Digital Library
Moldable Transient Suppression Polymer Composite (open access)

Moldable Transient Suppression Polymer Composite

The objective of the CRADA was to cooperate in the development of a moldable transient suppression polymer composite that can be used to protect electrical equipment and electronics from damage caused by electrical disturbances and faults. The composite was to provide a solid- state means of fault current limitation, particularly for high-current applications. The composite was envisioned to have the following properties: (1) be moldable and therefore suited to the automated manufacture at a low cost; (2) operate with greater speed and reliability than electromechanical devices; and (3) operate in conjunction with appropriately designated mechanical breakers to limit the current and energy under short-circuit fault conditions, thereby providing improved protection to equipment connected to the circuit. The technical work of the project was in part shared between Lockheed Martin and the General Electric Company and in part divided between the participants according to their capabilities. Work was performed in the Oak Ridge K-25, Y-12, and X-10 facilities of Lockheed Martin and at the General Electric Company Corporate Research and Development (GE-CR&D) and Electrical Distribution and Control (GE-ED&C) facilities. Materials were fabricated in facilities of the Y-12 Development. Department, where polymers were filled with varying amounts of conductive materials. However, as …
Date: November 24, 1998
Creator: Campbell, V. B. & Modine, F. A.
Object Type: Report
System: The UNT Digital Library
Sensitivity Analyses of Alternative Methods for Disposition of High-Level Salt Waste: A Position Statement (open access)

Sensitivity Analyses of Alternative Methods for Disposition of High-Level Salt Waste: A Position Statement

This position paper provides the approach and detail pertaining to a sensitivity analysis for the Phase II definition of weighted evaluation criteria weights and utility function values on the total utility scores for each Initial List alternative due to uncertainty and bias in engineering judgment.
Date: June 24, 1998
Creator: Harris, S.P. & Tuckfield, R.C.
Object Type: Report
System: The UNT Digital Library
Project W-320, 241-C-106 sluicing: Civil/structural calculations. Volume 6 (open access)

Project W-320, 241-C-106 sluicing: Civil/structural calculations. Volume 6

This supporting document has been prepared to make the FDNW calculations for Project W-320 readily retrievable. The purpose of this calculation is to conservatively estimate the weight of equipment and structures being added over Tank 241-C-106 as a result of Project W-320 and combine these weights with the estimated weights of existing structures and equipment as calculated in Attachment 1. The combined weights will be compared to the allowable live load limit to provide a preliminary assessment of loading conditions above Tank 241-C-106.
Date: July 24, 1998
Creator: Bailey, J. W.
Object Type: Report
System: The UNT Digital Library
Project W-320, 241-C-106 sluicing: Piping calculations. Volume 5 (open access)

Project W-320, 241-C-106 sluicing: Piping calculations. Volume 5

This supporting document has been prepared to make the FDNW calculations for Project W-320 readily retrievable.
Date: July 24, 1998
Creator: Bailey, J. W.
Object Type: Report
System: The UNT Digital Library
Project W-320, 241-C-106 sluicing: Piping calculations. Volume 4 (open access)

Project W-320, 241-C-106 sluicing: Piping calculations. Volume 4

This supporting document has been prepared to make the FDNW calculations for Project W-320 readily retrievable. The objective of this calculation is to perform the structural analysis of the Pipe Supports designed for Slurry and Supernate transfer pipe lines in order to meet the requirements of applicable ASME codes. The pipe support design loads are obtained from the piping stress calculations W320-27-I-4 and W320-27-I-5. These loads are the total summation of the gravity, pressure, thermal and seismic loads. Since standard typical designs are used for each type of pipe support such as Y-Stop, Guide and Anchors, each type of support is evaluated for the maximum loads to which this type of supports are subjected. These loads are obtained from the AutoPipe analysis and used to check the structural adequacy of these supports.
Date: July 24, 1998
Creator: Bailey, J. W.
Object Type: Report
System: The UNT Digital Library
Testing and diagnostic capabilities at LLNL (open access)

Testing and diagnostic capabilities at LLNL

Testing activities today at LLNL occur at three different locations: Livermore, Site 300, and the Nevada Test Site. At the Livermore location, there are three gas guns, two of which are used primarily for materials studies and scientific experiments on materials. The third gun is located in the High Explosive Applications Facility (HEAF) and fires into a chamber rated for 10 kg of explosive containment. The HEAF gun is used primarily for impact studies on explosives. Also within HEAF are five other containment chambers for explosive testing. Each is instrumented to varying degrees to supply the necessary information of explosive behavior. These include high speed optics, Fabry Perot velocimetry and radiography. The descriptions of the three gas guns and a summary of the HEAF facility are presented in the accompanying figures.
Date: September 24, 1998
Creator: Baum, D W
Object Type: Article
System: The UNT Digital Library