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Saturday, April 18, 2020 | History

1 edition of evaluation of models used for the assessment of radionuclide releases to the environmental found in the catalog.

evaluation of models used for the assessment of radionuclide releases to the environmental

evaluation of models used for the assessment of radionuclide releases to the environmental

progress report for the period April 1976 through December 1977

by

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Published by Oak Ridge National Labortory, Health and Safety Research Division, for sale by the National Technical Information Service in Oak Ridge, Tenn, Springfield, Va .
Written in English

    Subjects:
  • Radioisotopes -- Mathematical models

  • Edition Notes

    Statementcompiler, Charles W. Miller ; contributors, Donald E. Dunning, Jr. ... [et al.]
    SeriesORNL ; 5382
    ContributionsMiller, Charles W, Dunning, Donald E, Oak Ridge National Laboratory. Health and Safety Research Division
    The Physical Object
    Paginationxi, 176 p. :
    Number of Pages176
    ID Numbers
    Open LibraryOL14881157M

    AN ASSESSMENT OF RADIONUCLIDE RELEASE ACCORDING TO THE PLUTONIUM ISOTOPIC COMPOSITION IN THE ENVIRONMENT T1-P5 A. Puzas*, D. Baltrūnas, V. Remeikis, R. Druteikienė Center for Physical Sciences and Technology, Institute of Physics, LITHUANIA. Table of contents for Radiological risk assessment: environmental risk analysis / edited by John E. Till and Helen A. Grogan. Degradation/Decay Radionuclide Decay Transformation Yield-of-Daughter Products Radionuclide Contributions from Other Environmental Media Radionuclide Transport Models Accidental Radionuclide Releases Routine Long. Any concentration of a substance measured in a living or non-living system results from its distribution among all of the environmental compartments: air, water, sediments, and biota. The transfer of a substance from one compartment . Äspö Hard Rock Laboratory in Sweden is used to exemplify how the discrete-fracture and the solute transport models are coupled. The coupled model also enables an assessment of whether a process, that is important in the small scale (time or space), is important also on the larger geosphere scale. Relevance for SKI.


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evaluation of models used for the assessment of radionuclide releases to the environmental Download PDF EPUB FB2

Get this from a library. The evaluation of models used for the assessment of radionuclide releases to the environmental: progress report for the period April through December [Chas W Miller; Donald E Dunning; Oak Ridge National Laboratory. Health and. @article{osti_, title = {Evaluation of models used for the assessment of radionuclide releases to the environment: summary of documentation, April June }, author = {Kanak, K A and Miller, C W}, abstractNote = {A project is underway at Oak Ridge National Laboratory (ORNL) to identify models available for environmental radiological assessments; to evaluate.

Workshop on the Evaluation of Models Used for the Environmental Assessment of Radionuclide Releases ( Gatlinburg, Tenn.) Proceedings of a Workshop on the Evaluation of Models Used for the Environmental Assessment of Radionuclide Releases, Gatlinburg, Tennessee, SeptemberTechnical Report: Evaluation of models used for the assessment of radionuclide releases to the environment.

Progress report, April December Progress report, April December Review and assessment of models used to predict the fate of radionuclides in lakes Article Literature Review (PDF Available) in Journal of Environmental Radioactivity 69(3).

The generic conceptual framework for dose rate assessment and management is: radionuclide releases → environmental transfer → exposure pathways → dose rate estimation → comparison with standards → development and application of appropriate controls.

This talk will focus on steps 2 through 4 of this process. The present paper describes the results of the assessment and evaluation of models for predicting the behaviour of radionuclides in lacustrine ecosystems. Such models were developed and tested within the frame of the most important projects financed by the European Commission during the 4th framework programme (–) or organised by Cited by: This report documents in detail the conceptual and mathematical models and key data used in the landscape model set-up, radionuclide transport modelling, and radiological consequences analysis applied in the biosphere assessment.

Resulting environmental activity concentrations in landscape model due to constant unit. (ii) The basis for modelling the effects of spatial variability on radionuclide migration.

(iii) The characterisation of water-conducting features and their representation in models of radionuclide migration.

(iv) Confidence in models of radionuclide transport for. Simulations for Dose Assessments. The model accepts time and spatially distributed releases as input.

However, for the purpose of this specific safety assessment we performed simulations for unit releases of each radionuclide to obtain radionuclide-specific Dose Conversion Factors (annual doses per unit release rate), which we then multiplied by the Cited by: UNITED STATES ENVIRONMENTAL PROTECTION AGENCY WASHINGTON, D.C.

Febru EPA-SAB-RAC-ADV OFFICE OF THE ADMINISTRATOR Honorable Carol M. Browner • SCIENCE ADVISORY BOARD Administrator U.S. Environmental Protection Agency M. Street, S.W. Washington, DC Re: Advisory on Modeling of Radionuclide. The present paper summarises the results of the review and assessment of state-of-the-art models developed for predicting the migration of radionuclides through rivers.

Studies on the transport of radionuclides through runoff were initiated as soon as the fallout from nuclear weapon tests in atmosphere became a significant source of environmental contamination (Menzel,Yamagata et al., ).Helton et al.

() reviewed the parameter values used in models for predicting the migration of radiocaesium, radiostrontium and plutonium from Cited by:   The overall impact of the CRP was enhancement of research reactor safety. This was accomplished through the exchange of information and experience among the CRP participants and with the broader research reactor community in the areas of evaluation of source terms and assessment of radiological consequences in the frame of safety analysis of.

As with the comprehensive dose assessment, the radiation dose from internal sources as a result of either inhalation or ingestion can use PBPK models. The absorbed doses also must be calculated in terms of the LET of the various particles emitted (the high-LET alpha particles and the low-LET beta particles and photons).

of the models and methods are appropriate for wider use. Default values are given for many parameters and these have been used to determine illustrative results. The models adopted in the methodology are those considered appropriate for routine releases, ie, releases that can be considered as continuous and Size: 2MB.

Identification and Prioritization of Radionuclide Releases from the Idaho National Engineering and Environmental Laboratory Centers for Disease Control and Prevention. Department of Health and Human Services. October 8, Submitted to the Center for Disease Control and Prevention.

in Partial Fulfillment of Contract No. Radiological Assessment: Predicting the Transport, Bioaccumulation and Uptake by Man of Radionuclides Released to the Environment (N C R P REPORT) [National Coun on Radiation Protection Amd Measurement] on *FREE* shipping on qualifying offers.

Radiological Assessment: Predicting the Transport, Bioaccumulation and Uptake by Man of. EPA//R/ July Simulating Radionuclide Fate and Transport in the Unsaturated Zone: Evaluation and Sensitivity Analyses of Select Computer Models by Jin-Song Chen, Ronald L.

Drake and Zhixun Lin Dynamac Corporation Oakridge Boulevard Ada, OK David G. Jewett Subsurface Protection and Remediation Division National Risk Management. 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 5/5(3). Proceedings of “Evaluation of Models Used for the Environmental Assessment of Radionuclide Releases.” Gatlinburg, Tennessee, September 6–7,Report No. CONF, Oak Ridge National Laboratory, Oak Ridge, by: 7.

In the context of disposal of radioactive waste, a performance assessment is a quantitative evaluation of potential releases of radioactivity from a disposal facility into the environment, and assessment of the resultant radiological term performance assessment can refer to the process, model, or collection of models used to estimate future doses to human receptors.

Abstract. Models of varying degrees of complexity are used to simulate the transport of uranium through the environment. These models rely heavily on empirical data on soil and sediment distribution coefficients and concentration ratios or transfer factors for : M.

Thorne. committee on an assessment of centers for disease control and prevention radiation studies from doe contractor sites: review the identification and prioritization of radionuclide releases from the idaho national engineering and environmental laboratory report.

SCREENING EVALUATION OF RADIONUCLIDE GROUNDWATER CONCENTRATIONS FOR THE END STATE BASEMENT FILL MODEL ZION NUCLEAR POWER STATION DECOMMISSIONING PROJECT Terry Sullivan Revision 1: June 9, Informal Report Environmental & Climate Sciences Department Brookhaven National Laboratory P.O.

Box Upton, NY   Measuring the level of radioactivity during the routine discharges of radionuclides in the environment is a prerequisite for the assessment and evaluation of radiological impacts.

Participants at an IAEA Modelling and Data for Radiological Impact Assessment (MODARIA) workshop this week compared and evaluated methods to estimate the impact of. Environmental assessment models are used for evaluating the radiological impact of actual and potential releases of radionuclides to the environment.

They are essential tools for use in the regulatory control of routine discharges to the environment and also in planning measuresFile Size: 2MB. Performance assessment of proposed waste disposal sites requires models of radionuclide transport through the geosphere.

To be used in repository planning and development, these models must have the confidence of both national waste management programmes and the wider scientific community. Understanding radionuclide behaviour in the natural environment is essential to the sustainable development of the nuclear industry and key to assessing potential environmental risks reliably.

Minimising those risks is essential to enhancing public confidence in nuclear technology. assessments are used, for example, in the evaluation of the radiological relevance of routine and accidental releases of radionuclides, to support decision making in remediation work, for the performance assessment of nuclear waste disposal facilities, as well as for clearance and exemption of material with low levels of radioactivity.

ANEMOS is not to be used for short-term or accidental releases. It is appropriate only for chronic releases. It models only one source per run. Multiple ANEMOS results may be combined using SUMIT.

MLSOIL does not allow upward transport of radionuclides. MLSOIL will truncate radionuclide chains of length greater than the radionuclide of interest is present in background. Scoping survey information needed when conducting a preliminary risk assessment (as noted above for CERCLA and RCRA sites) includes the general radiation levels at the site and gross levels of residual contamination on building surfaces and in environmental media.

If unexpected. August. discharges into the environment for risk assessment evaluations (screening of radioactive discharges). Within the revised document, some of the default parameter values, used in the models for calculating the transfer of radionuclides in food chains to humans and contributing to ingestion dose were those given in Technical Reports Series No.

Dose reconstruction methods have also commonly been applied in environmental settings to assess radionuclide releases into the environment from nuclear sites. One such environmentally focused study was published in by the U.S. Nuclear Regulatory Commission entitled Radiological Risk Assessment: A Textbook on Environmental Dose Analysis.

In the SKB safety assessment of the spent fuel repository, radionuclide transport and dose modeling of the biosphere reported by Avila et al. (, ) were used as a basis for quantifying the radiological consequences of hypothetical future releases from the repository (SKB; Kautsky et al.

).Cited by: The purpose of this manual is to assist officials in establishing emergency response plans and in making decisions during a nuclear incident. PAG Manuals and Resources. Protective Action Guides (PAGs) () Fact Sheet on the Proposed Revisions (PDF) (2 pp, 85 K, April ) radiation protection, radiological emergency, proposed document.

Modelling and Assessment of Radionuclides Differential Transport in Groundwater 3 CL = M/(Aׂ ×D + `×Kd) (1) In the above equation, CL (Bq/m 3) is the leachate concentration; M (Bq) is the amount of radionuclide in the source (Bq); A is the area of the source (m2); q (di- mensionless) is the volumetric water content, which depends on saturation ratio.

Note. As of November the exposure models presented here use values from the EPA's Exposure Factor every attempt was made to duplicate the exposure models, element-specific parameters and slope factors used by the EPA's Radionuclide PRG RAIS calculator also presents additional exposure models.

This chapter addresses the problem of estimating historic or future releases of radionuclides. The process of defining the “source term” is often the first step in a risk assessment. When detailed information about environmental or personal contamination levels is available, source term estimation may not be helpful; however, such data are never available for prospective.

•Codes used by the NRC staff provide useful tools for assessing environmental consequences involving flood risks and radionuclide releases and transport in air, soil, surface- and ground-water systems •NRC staff is pursuing enhancement of environmental models and databases for a variety of regulatory.

the night of 14 March using the environmental monitoring data for air dose rate and air concentra-tions of radionuclides, which were additionally dis-closedbyTEPCOon28May (TEPCO,),and the Ministry of Economy, Trade and Industry (METI) on3June (METI,).Aftertwo major releases on 15 Marchanother two major releases on needed, for example, in the evaluation of the radiological relevance of routine and accidental releases of radionuclides, to assist in decision making during remediation activities, in the International exercises to develop and improve environmental assessment models are Modelling radionuclide releases to the environment.The assessment of the long-term safety of a repository for nuclear waste1 requires a powerful and qualified instrument.

The approach used for the safety assessment must meet national regulations on the one hand and should be internationally accepted on the other hand. Further it must be continuously adapted to the state of the art of sci.