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Leak Path Factor Evaluation
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Book Synopsis Leak Path Factor Evaluation Methodology for Non-Reactor Facilities by :
Download or read book Leak Path Factor Evaluation Methodology for Non-Reactor Facilities written by and published by . This book was released on 2004 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Leak Path Factor (LPF) for a nonreactor nuclear facility is a critical component for the evaluation of the source term used to evaluate the on-site and off-site consequences when an accident produces aerosols containing radioactive powders that propagate through the facility and finally to the outside environment. The Leak Path Factor is defined as the fraction of the airborne radioactive particulate material that is in the respirable size range within the building that escapes via available pathways to the outside environment. This paper presents a methodology to evaluate the LPF for various accident conditions (e.g., seismic event, fire) that could take place in a nonreactor nuclear facility using MELCOR computer code. The methodology presented could enable analysts to efficiently model facilities to assess the magnitude of the LPF by evaluating its various components.
Download or read book Leak Path Factor Evaluation written by and published by . This book was released on 2004 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presents a Leak Path Factor (LPF) analysis for a postulated fire accident on a building containing plutonium powder when the resulting outside release is partly through the ventilation/filtration system and partly through other pathways such as building access doorways. When analyzing an accident scenario involving the release of radioactive powders inside a building, various pathways for the release to the outside environment can exist. This study is presented to show how the multiple building leak path factors (combination of filtered and unfiltered releases) can be evaluated in an integrated manner to assess the magnitude of the source term to be used in the consequence analysis. The core of the analysis is to calculate the leak path factor, which represents the fraction of respirable radioactive powder that is made airborne that leaves the building through the various pathways. The computer code of choice for this determination is MELCOR1. The analysis results can be used for the transport and dispersion of powder material released to the atmosphere and to estimate the resulting dose that is received by the downwind receptors of interest. This work can be used as model for performing analyses for systems similar in nature where releases can propagate to the outside environment via filtered and unfiltered pathways. This example provides guidance to analysts outlining the essential steps needed to perform a sound and defensible analysis.
Book Synopsis MELCOR 2.1 Leak Path Factor Assessment and Guidance by :
Download or read book MELCOR 2.1 Leak Path Factor Assessment and Guidance written by and published by . This book was released on 2012 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Leak Path Factor Study at Savannah River Site by :
Download or read book Leak Path Factor Study at Savannah River Site written by and published by . This book was released on 2000 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Leak Path Factor analysis has been traditionally performed at Savannah River Site for various facilities subject to accident analysis. This paper addresses some recent work for the FB-Line building, which needed refinements to previous work that was based on a single volume approach. To model the entire building and all its simultaneous spills of contaminants in the different floors after a seismic event, a more complex multi-compartment analysis was performed using the CONTAIN 2.0 computer code. This work enabled the analysts to improve the assessment of the source term for the subsequent evaluation of the onsite and offsite doses.
Book Synopsis Direct Calculation of Leak Path Factors for Highly Compartmentalized Buildings by :
Download or read book Direct Calculation of Leak Path Factors for Highly Compartmentalized Buildings written by and published by . This book was released on 1998 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The large, highly compartmentalized configurations of buildings at many Department of Energy (DOE) facilities call the validity of traditional, simplistic methods for estimating contaminant leak path factors (LPFs) into question. Conversely, rigorous calculation of LPFs using detailed flow-field analysis computer codes is impractical for routine analysis. This paper describes a recent application of a rigorous, yet practical, method of calculating LPFs for the Chemical and Metallurgical Research (CMR) Facility at Los Alamos National Laboratory (LANL). The approach involves computer simulation of airborne contaminant transport using the MELCOR computer code. MELCOR is a general-purpose, fluid flow and aerosol transport analysis code originally developed by the US Nuclear Regulatory Commission to evaluate the release, transport, and deposition of radionuclides in nuclear reactor systems. However, the fundamental mathematical models in the code and the modular code architecture make it suitable to the CMR analysis.
Book Synopsis Ensuring Conservatism/Lessons Learned in Leak Path Factor Calculations with Melcor by :
Download or read book Ensuring Conservatism/Lessons Learned in Leak Path Factor Calculations with Melcor written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Environmental Impact Statement of the Construction and Operation of a Proposed Mixed Oxide Fuel Fabrication Facility at the Savannah River Site, South Carolina by :
Download or read book Environmental Impact Statement of the Construction and Operation of a Proposed Mixed Oxide Fuel Fabrication Facility at the Savannah River Site, South Carolina written by and published by Government Printing Office. This book was released on 2005-02-24 with total page 1104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Evaluates the potential environmental impacts of a proposed mixed oxide fuel (MOX) fabrication facility that would convert depleted uranium and weapons-grade plutonium into MOX fuel.
Book Synopsis Methodology Using MELCOR Code to Model Proposed Hazard Scenario by :
Download or read book Methodology Using MELCOR Code to Model Proposed Hazard Scenario written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This study demonstrates a methodology for using the MELCOR code to model a proposed hazard scenario within a building containing radioactive powder, and the subsequent evaluation of a leak path factor (LPF) (or the amount of respirable material which that escapes a facility into the outside environment), implicit in the scenario. This LPF evaluation will analyzes the basis and applicability of an assumed standard multiplication of 0.5 x 0.5 (in which 0.5 represents the amount of material assumed to leave one area and enter another), for calculating an LPF value. The outside release is dependsent upon the ventilation/filtration system, both filtered and un-filtered, and from other pathways from the building, such as doorways (, both open and closed). This study is presents ed to show how the multiple leak path factorsLPFs from the interior building can be evaluated in a combinatory process in which a total leak path factorLPF is calculated, thus addressing the assumed multiplication, and allowing for the designation and assessment of a respirable source term (ST) for later consequence analysis, in which: the propagation of material released into the environmental atmosphere can be modeled and the dose received by a receptor placed downwind can be estimated and the distance adjusted to maintains such exposures as low as reasonably achievableALARA. Also, this study will briefly addresses particle characteristics thatwhich affect atmospheric particle dispersion, and compares this dispersion with leak path factorLPF methodology.
Book Synopsis Programmatic EIS for Stockpile Stewardship and Management by :
Download or read book Programmatic EIS for Stockpile Stewardship and Management written by and published by . This book was released on 1996 with total page 1044 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Construction and Operation of a Mixed Oxide Fuel Fabrication Facility at the Savannah River Site by :
Download or read book Construction and Operation of a Mixed Oxide Fuel Fabrication Facility at the Savannah River Site written by and published by . This book was released on 2005 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Plutonium Finishing Plant (pfp) Stabilization, Hanford Site, Richland, Benton County by :
Download or read book Plutonium Finishing Plant (pfp) Stabilization, Hanford Site, Richland, Benton County written by and published by . This book was released on 1996 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proposed Relocation of Technical Area 18 Capabilities and Materials at the Los Alamos National Laboratory by :
Download or read book Proposed Relocation of Technical Area 18 Capabilities and Materials at the Los Alamos National Laboratory written by and published by . This book was released on 2002 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Rocky Flats Environmental Technology Site by :
Download or read book Rocky Flats Environmental Technology Site written by and published by . This book was released on 1998 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Radiological Risk Assessment and Environmental Analysis by : John E. Till
Download or read book Radiological Risk Assessment and Environmental Analysis written by John E. Till and published by Oxford University Press. This book was released on 2008-07-10 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radiological Risk Assessment and Environmental Analysis comprehensively explains methods used for estimating risk to people exposed to radioactive materials released to the environment by nuclear facilities or in an emergency such as a nuclear terrorist event. This is the first book that merges the diverse disciplines necessary for estimating where radioactive materials go in the environment and the risk they present to people. It is not only essential to managers and scientists, but is also a teaching text. The chapters are arranged to guide the reader through the risk assessment process, beginning with the source term (where the radioactive material comes from) and ending with the conversion to risk. In addition to presenting mathematical models used in risk assessment, data is included so the reader can perform the calculations. Each chapter also provides examples and working problems. The book will be a critical component of the rebirth of nuclear energy now taking place, as well as an essential resource to prepare for and respond to a nuclear emergency.
Book Synopsis Chemistry and Metallurgy Research Building Replacement Project at Los Alamos National Laboratory by :
Download or read book Chemistry and Metallurgy Research Building Replacement Project at Los Alamos National Laboratory written by and published by . This book was released on 2003 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Simulation of Semiconductor Processes and Devices 2007 by : Tibor Grasser
Download or read book Simulation of Semiconductor Processes and Devices 2007 written by Tibor Grasser and published by Springer Science & Business Media. This book was released on 2007-09-18 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: The "Twelfth International Conference on Simulation of Semiconductor Processes and Devices" (SISPAD 2007) continues a long series of conferences and is held in September 2007 at the TU Wien, Vienna, Austria. The conference is the leading forum for Technology Computer-Aided Design (TCAD) held alternatingly in the United States, Japan, and Europe. The first SISPAD conference took place in Tokyo in 1996 as the successor to three preceding conferences NUPAD, VPAD, and SISDEP. With its longstanding history SISPAD provides a world-wide forum for the presentaƯ tion and discussion of outstanding recent advances and developments in the field of numerical process and device simulation. Driven by the ongoing miniaturization in semiconductor fabrication technology, the variety of topics discussed at this meeting reflects the ever-growing complexity of the subject. Apart from the classic topics like process, device, and interconnect simulation, mesh generation, a broad specƯ trum of numerical issues, and compact modeling, new simulation approaches like atomistic and first-principles methods have emerged as important fields of research and are currently making their way into standard TCAD suites
Book Synopsis An Integrated Accident & Consequence Analysis Approach for Accidental Releases Through Multiple Leak Paths by :
Download or read book An Integrated Accident & Consequence Analysis Approach for Accidental Releases Through Multiple Leak Paths written by and published by . This book was released on 2004 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presents a consequence analysis for a postulated fire accident on a building containing plutonium when the resulting outside release is partly through the ventilation/filtration system and partly through other pathways such as building access doorways. When analyzing an accident scenario involving the release of radioactive powders inside a building, various pathways for the release to the outside environment can exist. This study is presented to guide the analyst on how the multiple building leak path factors (combination of filtered and unfiltered releases) can be evaluated in an integrated manner starting with the source term calculation and proceeding through the receptor consequence determination. The analysis is performed in a two-step process. The first step of the analysis is to calculate the leak path factor, which represents the fraction of respirable radioactive powder that is made airborne that leaves the building through the various pathways. The computer cod e of choice for this determination is MELCOR. The second step is to model the transport and dispersion of powder material released to the atmosphere and to estimate the resulting dose that is received by the downwind receptors of interest. The MACCS computer code is chosen for this part of the analysis. This work can be used as model for performing analyses for systems similar in nature where releases can propagate to the outside environment via filtered and unfiltered pathways. The methodology provides guidance to analysts outlining the essential steps needed to perform a sound and defensible consequence analysis.
