PADLOC: a one-dimensional computer program for calculating coolant and plateout fission-product concentrations. Part 2
The behavior of some of the prominent fission products along their convection pathways is dominated by the interaction of other species with them. This gave rise to the development of a plateout code capable of analyzing coupled species effects. The single species plateout computer program PADLOC is described in Part I of this report. The present Part II is concerned with the extension of PADLOC to MULTI*PADLOK, a multiple species version of PADLOC. MULTI*PADLOC is designed to analyze the time and one-dimensional spatial dependence of the concentrations of interacting (fission product) species in the carrier gas and on the surrounding wall surfaces on an arbitrary network of flow channels. The problem solved is one of mass transport of several impurity spceis in a gas, including the effects of sources in the gas and on the surface, convection along the flow paths, decay interaction, sorption interaction on the wall surfaces, and chemical reaction interactions in the gas and on the surfaces. These phenomena are governed by a system of coupled, nonlinear partial differential equations. The solution is achieved by: (a) linearizing the equations about an approximate solution and employing a Newton-Raphson iteration technique, (b) employing a finite difference solution method with an implicit time integration, and (c) employing a substructuring technique to logically organize the systems of equations for an abitrary flow network.
- Research Organization:
- General Atomics, San Diego, CA (United States)
- DOE Contract Number:
- AT03-76ET35301
- OSTI ID:
- 5960248
- Report Number(s):
- GA-A-14401-Pt.2; ON: DE82000679; TRN: 82-001624
- Country of Publication:
- United States
- Language:
- English
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FISSION PRODUCTS
MASS TRANSFER
GAS COOLED REACTORS
RADIOACTIVITY TRANSPORT
ADSORPTION
CHEMICAL REACTIONS
COMPUTER CODES
CONVECTION
DIFFERENTIAL EQUATIONS
GASES
M CODES
P CODES
REACTOR CHANNELS
SURFACES
EQUATIONS
FLUIDS
ISOTOPES
MATERIALS
RADIOACTIVE MATERIALS
REACTOR COMPONENTS
REACTORS
SORPTION
210300* - Power Reactors
Nonbreeding
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