MELCOR Accident Consequence Code System (MACCS)

Abstract

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SCDAP/RELAP5/MOD 3.1 code manual: Damage progression model theory. Volume 2

“…The tridiagonal system of Equations (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14) or (2-18) can be solved by either by Gaussian elimination methods or odd even reduction methods.…”

“…The matrix A in the matrix Equation (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14) or (2-18) is factored into the product of an upper-triangular matrix 0 and a lower-triangular matrix (L) as follows:…”

Creating and running worldwide accident scenarios with JRodos

“…for licensing of nuclear power plants, combine categorized source terms with a large number of weather sequences that are selected from data sets covering one year or more under given statistical assumptions. Running applications of this type was previously the domain of computer codes such as COSYMA (KfK and NRPB, 1991) in the European Union and MACCS (Chanin et al, 1990) in the US, that generated the complete result spectrum and performed the probabilistic analysis within one run. Nowadays, the development in information technology also allows tackling these problems with modern decision support systems such as JRodos, separating the result generation from the statistical analysis that will follow.…”

Radionuclide Disperse To Environtment From Pwr Reactor On Severe Accident Condition Using Maccs Program

“…Dispersion parameter is a parameter that is analyzed and written on the Safety Analysis Report (SAR) as part of Chapter on NPP accident analysis. Dispersion parameters can be estimated using Gaussian Plume Model (GPM) as used in computer codes TREX (Hungary), MACCS (Taiwan, USA), OSCAAR ( Japan), LENA (Brazil ), and using Lagrangian Plume Model (LPM) as used in computer codes HYSPLIT (USA), NAME III (UK), MINERVE-SPRAY (CEA-France) [1,2,3,4,5,6,7]. Estimation data of dispersion parameters for Muria Peninsula site plant simulation analyzed using the PC-Cosyma code has been successfully carried out [8,9].…”