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Harmonization of French and German calculation procedures for atmospheric dispersion following accidental releases from nuclear power plants

Conference:

Abstract

In case of an accident in a nuclear power plant near the French-German border different schemes for dispersion calculations in both countries will currently be applied. An intercomparison of these schemes initiated from the German-French Commission for the safety of nuclear installations (DFK) revealed in some meteorological situations large differences in the resulting concentrations for radionuclides. An ad hoc working group was installed by the DFK with the mandate to analyse the reasons for the different model results and also to consider new theoretical concepts. The working group has agreed to apply a Gaussian puff model for emergency response calculations. The results of the model based on turbulence parameterization via similarity approach or spectral theory - have been compared with tracer experiments for different emission heights and atmospheric stability regimes. As a reference the old modelling approaches have been included in the study. The simulations with the similarity approach and the spectral theory show a slightly better agreement to the measured concentration data than the schemes used in the past. Instead of diffusion categories both new approaches allow a continuous characterization of the atmospheric dispersion conditions. Because the spectral approach incorporates the sampling time of the meteorological data as an  More>>
Authors:
Crabol, B; Romeo, E; [1]  Massmeyer, K; Martens, R; [2]  Nester, K; [3]  Schnadt, H [4] 
  1. CEA Centre d`Etudes de Fontenay-aux-Roses, 92 (France). Dept. de Protection de l`Environnement et des Installations
  2. Gesellschaft fuer Reaktorsicherheit mbH (GRS), Garching (Germany)
  3. Kernforschungszentrum Karlsruhe GmbH (Germany). Inst. fuer Material- und Festkoerperforschung
  4. Technischer Ueberwachungs-Verein Rheinland e.V., Koeln (Germany)
Publication Date:
Dec 31, 1992
Product Type:
Conference
Report Number:
CEA-CONF-11611; CONF-920950-
Reference Number:
SCA: 540130; PA: AIX-25:002540; EDB-94:014976; ERA-19:005123; NTS-94:014140; SN: 93001120129
Resource Relation:
Conference: Seminar on impact of nuclear installations on the environment,Fribourg (Switzerland),15-18 Sep 1992; Other Information: PBD: 1992
Subject:
54 ENVIRONMENTAL SCIENCES; FALLOUT DEPOSITS; MATHEMATICAL MODELS; REACTOR ACCIDENTS; REACTORS; COMPARATIVE EVALUATIONS; FRENCH ORGANIZATIONS; GAUSS FUNCTION; GERMAN FR ORGANIZATIONS; 540130; RADIOACTIVE MATERIALS MONITORING AND TRANSPORT
OSTI ID:
10111215
Research Organizations:
CEA Centre d`Etudes de Fontenay-aux-Roses, 92 (France). Dept. de Protection de l`Environnement et des Installations
Country of Origin:
France
Language:
English
Other Identifying Numbers:
Other: ON: DE94608869; TRN: FR9303881002540
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
FRN
Size:
5 p.
Announcement Date:
Jun 30, 2005

Conference:

Citation Formats

Crabol, B, Romeo, E, Massmeyer, K, Martens, R, Nester, K, and Schnadt, H. Harmonization of French and German calculation procedures for atmospheric dispersion following accidental releases from nuclear power plants. France: N. p., 1992. Web.
Crabol, B, Romeo, E, Massmeyer, K, Martens, R, Nester, K, & Schnadt, H. Harmonization of French and German calculation procedures for atmospheric dispersion following accidental releases from nuclear power plants. France.
Crabol, B, Romeo, E, Massmeyer, K, Martens, R, Nester, K, and Schnadt, H. 1992. "Harmonization of French and German calculation procedures for atmospheric dispersion following accidental releases from nuclear power plants." France.
@misc{etde_10111215,
title = {Harmonization of French and German calculation procedures for atmospheric dispersion following accidental releases from nuclear power plants}
author = {Crabol, B, Romeo, E, Massmeyer, K, Martens, R, Nester, K, and Schnadt, H}
abstractNote = {In case of an accident in a nuclear power plant near the French-German border different schemes for dispersion calculations in both countries will currently be applied. An intercomparison of these schemes initiated from the German-French Commission for the safety of nuclear installations (DFK) revealed in some meteorological situations large differences in the resulting concentrations for radionuclides. An ad hoc working group was installed by the DFK with the mandate to analyse the reasons for the different model results and also to consider new theoretical concepts. The working group has agreed to apply a Gaussian puff model for emergency response calculations. The results of the model based on turbulence parameterization via similarity approach or spectral theory - have been compared with tracer experiments for different emission heights and atmospheric stability regimes. As a reference the old modelling approaches have been included in the study. The simulations with the similarity approach and the spectral theory show a slightly better agreement to the measured concentration data than the schemes used in the past. Instead of diffusion categories both new approaches allow a continuous characterization of the atmospheric dispersion conditions. Because the spectral approach incorporates the sampling time of the meteorological data as an adjustable parameter thereby offering the possibility to adjust the dispersion model to different emission scenarios this turbulence parameterization scheme will be foreseen as the basis for a joint French-German puff model.}
place = {France}
year = {1992}
month = {Dec}
}