Decommissioning and Waste Treatment Hazard Evaluation and Modeling

2009 ◽  
Author(s):  
Martin G. Plys ◽  
Michael Epstein
Keyword(s):  
Boundary Conditions ◽  
Computer Program ◽  
Waste Treatment ◽  
Hazard Evaluation ◽  
Dust Explosion ◽  
Engineered Safeguards

Hazards encountered during decommissioning and waste treatment involve different issues, emphasis, and scenarios than encountered during normal facility operations. This paper provides examples from experience in analysis and modeling of diverse facilities, framed in terms of custom phenomena models and their incorporation into integral facility analysis modeling. Models for entrainment of contamination and aerosol behavior are described and applied. The FATE™ (Facility Flow, Aerosol, Thermal, and Explosion) computer program is described, and example calculations are given for contamination release due to a dust explosion in order to demonstrate the sensitivity to boundary conditions and the use of engineered safeguards.

Joint and Cross Acceptances for Cross-Flow-Induced Vibration—Part II: Charts and Applications

2000 ◽  
Vol 122 (3) ◽  
pp. 355-361 ◽  
Author(s):  
M. K. Au-Yang
Keyword(s):  
Finite Element ◽  
Structural Analysis ◽  
Boundary Conditions ◽  
Computer Program ◽  
Cross Flow ◽  
Flow Induced Vibration ◽  
Modal Coupling ◽  
Analysis Computer ◽  
Flow Turbulence ◽  
Analysis Computer Program

Using closed-form and finite element solutions derived in Part I of this paper together with a standard commercial finite element structural-analysis computer program, the joint and cross acceptances for tubes and beams with different boundary conditions are calculated as a function of the correlation length up to 10 times the length of the structures. The results are presented in the form of charts. Steps are given to show how to use these charts together with standard commercial finite-element structural-analysis computer programs to estimate the responses of single and multi-span tubes and beams to cross-flow turbulence-induced vibration. The importance of cross-modal coupling for multi-supported beams is investigated. Examples are given. [S0094-9930(00)03303-5]

Vibration of Orthotropic Rectangular Plates With Variable Thickness

1989 ◽  
Vol 111 (1) ◽  
pp. 101-103 ◽  
Author(s):  
Wei-Cheun Liu ◽  
Stanley S. H. Chen
Keyword(s):  
Boundary Conditions ◽  
Computer Program ◽  
Variable Thickness ◽  
Energy Method ◽  
Natural Frequencies ◽  
Mixed Boundary ◽  
Mixed Boundary Conditions ◽  
Rectangular Plates ◽  
Orthotropic Plates ◽  
Orthotropic Properties

The problem vibration of rectangular orthotropic plates with variable thickness and mixed boundary conditions are solved by a modified energy method. A general expression is written for the deflection of the plate without aiming at any particular combination of boundary conditions. Boundary conditions are satisfied approximately by adjusting a set of so-called fixity factors. A computer program has been developed to solve for natural frequencies of plates with variable thicknesses and having different orthotropic properties.

The Influence of Oil Lubricated Journal Bearings on the Dynamics of Rotating Systems

1976 ◽  
Vol 190 (1) ◽  
pp. 627-633 ◽  
Author(s):  
H. McCallion ◽  
D. R. Wales
Keyword(s):  
Boundary Conditions ◽  
Computer Program ◽  
Translational Motion ◽  
Journal Bearings ◽  
Experimental Results ◽  
Oil Film ◽  
Rotating Systems ◽  
Film Boundary ◽  
Good Agreement

SYNOPSIS A computer program representing a shaft and rotor whirling in bearings which allows for realistic oil film boundary conditions and non-circular bearing profiles has been developed. It gave good agreement with experimental results published by Brown and France. With the aim of increasing understanding of the influence of bearing profile on system instability, the program calculates the timewise variation of the energy in translational motion supplied to the rotor by oil film forces. One case is illustrated.

A Simple Computer Program to Model Three-Dimensional Underground Heat Flow With Realistic Boundary Conditions

1983 ◽  
Vol 105 (1) ◽  
pp. 42-49 ◽  
Author(s):  
P. D. Metz
Keyword(s):  
Heat Flow ◽  
Boundary Conditions ◽  
Computer Program ◽  
Three Dimensional ◽  
Companion Paper ◽  
Coupled Systems ◽  
Moisture Movement ◽  
Solar Heat ◽  
Flow Equations ◽  
Flow Features

A FORTRAN computer program called GROCS (Ground Coupled Systems) has been developed to study three-dimensional underground heat flow. Features include the use of up to 30 finite elements or “blocks” of earth which interact via finite difference heat flow equations and a subprogram which sets realistic time and depth-dependent boundary conditions. No explicit consideration of moisture movement or freezing is given. GROCS has been used to model the thermal behavior of buried solar heat storage tanks (with and without insulation) and serpentine pipe fields for solar heat pump space conditioning systems. The program is available independently or in a form compatible with specially written TRNSYS component TYPE subroutines. This paper first describes the approach taken in the design of GROCS, the mathematics contained and the program architecture. Then, the operation of the stand-alone version is explained. Finally, the validity of GROCS is discussed. A companion paper serves as a user’s guide to the TRNSYS-compatible subroutine version.

Behavior of Finite Journal Bearings Under Dynamic Loading Conditions

1980 ◽  
Vol 102 (3) ◽  
pp. 333-338 ◽  
Author(s):  
G. S. A. Shawki ◽  
M. O. A. Mokhtar ◽  
Z. S. Safar
Keyword(s):  
Boundary Conditions ◽  
Computer Program ◽  
Variational Methods ◽  
Axial Length ◽  
Reynolds Equation ◽  
Journal Bearing ◽  
Journal Bearings ◽  
The Third ◽  
Dynamic Loading Conditions ◽  
Generalized Reynolds Equation

Performance characteristics for a complete journal bearing of finite axial length are obtained analytically using a new set of boundary conditions. The generalized Reynolds equation is transformed, in the present analysis, into three ordinary differential equations, two of which being readily integrable while the third is solved by variational methods. By the aid of a specially devised computer program, the validity of the analysis has been assured when applied to prescribed journal loci including stationary, circular, elliptical, and linear harmonic journal oscillation.

Fluid Transient Analysis in Pipelines With Nonuniform Liquid Density

1983 ◽  
Vol 105 (4) ◽  
pp. 423-428 ◽  
Author(s):  
S. W. Webb ◽  
J. L. Caves
Keyword(s):  
Boundary Conditions ◽  
Computer Program ◽  
Transient Analysis ◽  
Liquid Density ◽  
Characteristic Equations ◽  
Fluid Transient ◽  
Pipeline Valve ◽  
Input Parameters ◽  
Initial And Boundary Conditions

A fluid transient in a system with steady nonuniform liquid density can be analyzed by a single density computer program by modification of the input parameters. These changes allow the program to solve the correct characteristic equations with appropriate initial and boundary conditions. The applicability of the approach has been demonstrated by a transient analysis of a reservoir, pipeline, valve problem and comparing the results.

Development of Computer Program for Estimating Decommissioning Cost

2011 ◽  
Author(s):  
Hak-Soo Kim ◽  
Jong-Kil Park
Keyword(s):  
Computer Program ◽  
Cost Estimation ◽  
Nuclear Power ◽  
Power Plants ◽  
Waste Treatment ◽  
Assessment Tool ◽  
Unit Cost ◽  
Cost Effective ◽  
Cost Estimating ◽  
Plant Area

The programs for estimating the decommissioning cost have been developed for many different purposes and applications. The estimation of decommissioning cost is required a large amount of data such as unit cost factors, plant area and its inventory, waste treatment, etc. These make it difficult to use manual calculation or typical spreadsheet software such as Microsoft Excel. The cost estimation for eventual decommissioning of nuclear power plants is a prerequisite for safe, timely and cost-effective decommissioning. To estimate the decommissioning cost more accurately and systematically, KHNP, Korea Hydro and Nuclear Power Co. Ltd, developed a decommissioning cost estimating computer program called “DeCAT-Pro”, which is Decommissioning Cost Assessment Tool – Professional. (Hereinafter called “DeCAT”) This program allows users to easily assess the decommissioning cost with various decommissioning options. Also, this program provides detailed reporting for decommissioning funding requirements as well as providing detail project schedules, cash-flow, staffing plan and levels, and waste volumes by waste classifications and types. KHNP is planning to implement functions for estimating the plant inventory using 3-D technology and for classifying the conditions of radwaste disposal and transportation automatically.

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