Download or read book C 14 Release and Transport from a Nuclear Waste Repository in an Unsaturated Medium written by W. B. Light and published by . This book was released on 1990 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Release and Transport of Gaseous C 14 from a Nuclear Waste Repository in an Unsaturated Medium written by and published by . This book was released on 1990 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The potential nuclear waste repository at Yucca Mountain is to be in partially saturated rock. Released radioactive gases such as 14CO2 could have a direct pathway to the biosphere. We study the release of 14C released as 14CO2 from partly failed nuclear waste containers by analyzing the flow of gas into and out of a container. We analyze the transport of released 14CO2 in an unsaturated, fractured, porous medium with gas-phase advection and dispersion. We calculate the inhalation dose to a maximally exposed individual above ground, based on some conservative assumptions about release from containers. For the assumed parameter values, a simple atmospheric diffusion model gives very small doses when compared to background radiation doses. 12 refs., 4 figs., 1 tab.
Download or read book Scientific Basis for Nuclear Waste Management XIV written by Teofilo Aniag Abrajano and published by . This book was released on 1991 with total page 964 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1993-11 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Simulation of Two phase Carbon 14 Transport at Yucca Mountain Nevada written by and published by . This book was released on 1992 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: In support of pacific Northwest Laboratory's (PNL) preliminary total system performance assessment of the proposed high-level nuclear-waste repository at Yucca Mountain, transport of carbon-14 (C14) in the unsaturated zone was numerically modeled with the Multiphase Subsurface Transport Simulator (MSTS). Total system performance assessments are being conducted to estimate potential cumulative releases and doses from radionuclides being transported through different pathways to the accessible environment from the proposed waste repository. Transport of radionuclides in the gaseous and liquid phases are pathways through which some of the inventory in the proposed repository could reach the accessible environment. Carbon-14 transport in the unsaturated zone at Yucca Mountain was estimated with MSTS by considering two-phase diffusion, advection, phase petitioning, and radioactive decay. Transport results were based on a two-dimensional physical and hydrogeological system that represented an east-west cross section through Yucca Mountain. Carbon-14 source rates from failed repository waste canisters were estimated from the source term modeling subtasks associated with PNL's total system performance assessment of the proposed Yucca Mountain repository. Simulation results included estimates of liquid, gas, heat, and C14 transport within the unsaturated zone at Yucca Mountain. Predictions of C14 distributions surrounding the proposed nuclear waste repository within Yucca Mountain and a brief description of the thermal-hydrogeologic computer code MSTS are presented.
Download or read book Carbon 14 Releases from an Unsaturated Repository written by and published by . This book was released on 1993 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the US Environmental Protection Agency (EPA) Environmental Standards for the Management and Disposal of Spent Nuclear Fuel, High-Level and Transuranic Radioactive Wastes (40 CFR Part 191 or standards) is to protect public health and safety. The 1985 rule was developed on the basis of the assumption that the repository would be located in a geologic formation that lies below the water table. It is appropriate to examine gaseous releases and transport of pollutants in order to determine site adequacy. When the provisions of the 1985 standard are applied to Yucca Mountain, specifically the limits for carbon-14, we can release in 10,000 years no more than 7,000 curies of carbon-14 in the form of carbon dioxide. Meanwhile, the US Department of Energy (DOE) and others indicate that the repository may release about 8,000 curies of carbon-14 dioxide, an amount that exceeds the standard by 10 to 20 percent. The original basis of the 1985 standards was that, in a site below the water table, the limit for carbon-14 was technically achievable. It was not a standard based on a release level that would prevent a danger to public health. If we examine the danger to public health of the release of 8,000 curies of carbon-14 dioxide during and 8,000-year period, this release would not a pose a significant threat to the average individual. Industry and natural sources release many times this amount of carbon-14 dioxide each year. The question therefore becomes: is it appropriate to spend an additional $3.2 billion on waste packages when the expenditure does not measurably improve the public health?
Download or read book Equations for Predicting Release Rates for Waste Packages in Unsaturated Tuff written by and published by . This book was released on 1990 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific Basis for Nuclear Waste Management written by and published by . This book was released on 1990 with total page 962 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Safety written by and published by . This book was released on 1989 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book News Releases written by and published by . This book was released on 1991 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radioactive Waste Management written by and published by . This book was released on 1981 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mass Transfer Induced by Thermal Effects in Unsaturated Porous Media written by Wei Zhou and published by . This book was released on 1992 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Elements for the Performance Assessment of a High Level Waste Geologic Repository written by William Bradley Light and published by . This book was released on 1997 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analytical Models for C 14 Transport in a Partially Saturated Fractured Porous Media written by and published by . This book was released on 1989 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interaction between fractures and rock matrix is considered in developing a criterion for treating fractured rock as a porous medium for the purpose of transport calculations. The value of a modified Peclet number determines the suitability of the equivalent porous medium approach. Using a porous medium mode, underground concentrations of 14CO2 are predicted for the proposed nuclear waste repository at Yucca Mountain, Nevada. Maximum concentrations near the ground surface are comparable to the USNRC limit for unrestricted areas; travel times are predicted to be hundreds to thousands of years for the assumed parameter values. 8 refs., 7 figs.
Download or read book Yucca Mountain Site Characterization Project Bibliography 1994 1995 written by and published by . This book was released on 1996 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Yucca Mountain Site Characterization Project Bibliography 1992 1993 written by and published by . This book was released on 1994 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transport of Gaseous C 14 from a Repository in Unsaturated Rock written by W. B. Light and published by . This book was released on 1990 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
