USCD1239 VENTEASY.

VENTEASY, Criticality Search for a Desired Keffective by Adjusting Dimensions, Nuclide Concentrations, or Buckling

NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROGRAM OR FUNCTION, METHODS, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES, RELATED OR AUXILIARY PROGRAMS, STATUS, REFERENCES, HARDWARE REQUIREMENTS, LANGUAGE, SOFTWARE REQUIREMENTS, OTHER RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHORS, MATERIAL, CATEGORIES

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1. NAME OR DESIGNATION OF PROGRAM: VENTEASY

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2. COMPUTERS

To submit a request, click below on the link of the version you wish to order. Rules for end-users are available here.

Program name	Package id	Status	Status date
VENTEASY	USCD1239/02	Tested	13-OCT-2011

Machines used:

Package ID	Orig. computer	Test computer
USCD1239/02	PC Windows	PC Windows

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3. DESCRIPTION OF PROGRAM OR FUNCTION

VENTEASY is an easy-to-use neutronics code that was derived from the code module VENTNEUT in the BOLD VENTURE code system (Reference below).

The geometries that may be used are:
One dimension - Slab (X), Cylinder (R), Sphere (S)
Two Dimension - X-Y, R-Z, THETA-R, Triangle (T), Hexagon (H)
Three Dimensions - X-Y-Z, THETA-R-Z, T-Z, H-Z

Cross sections may be macroscopic or microscopic.

Types of problems that may be solved are:
- Multiplication factor (Keffective)
- Adjoint
- Criticality search for a desired Keffective by adjusting dimensions, nuclide concentrations, or buckling.

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4. METHODS

The finite-difference representation of diffusion theory or a simple P1approximation is used. Neutron-flux-eigenvalue problems are solved by direct inner-outer iterations with restrained line overrelaxtion. Asymptotic flux extrapolation is used when distinct error modes are established. The eigenvalue of a problem is calculated each outer iteration from an overall neutron balance; however, source ratios are used in some situations.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

The sizes of problems that may be solved are restricted only by the size of the computer memory.

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6. TYPICAL RUNNING TIME

Using an AMD Sempron Processor 3400+ (Speed 1803 MHz), and 1 GB DDR2 SDRAM at 533MHz; the two group-three dimensional IAEA benchmark problem (sample problems 20 and 27) required:
Mesh 17x17x19 - approximately 1 second
Mesh 136x136x152 - approximately 10 minutes

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7. UNUSUAL FEATURES

In the output data file, the input data for a problem is listed prior to the output data, and there is a condensed output data file that shows only minimum output.

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8. RELATED OR AUXILIARY PROGRAMS

VENTEASY uses the following code modules from the BOLD VENTURE code system (Reference below). STARTER, DRIVER, CROSPROS, INDCMACR, INDCRSPR, INDENMAN, INDUTLIN, INDVENTR, INPROSER, PERTUBAT, WRITCTL, WRAPERUP.

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9. STATUS

Package ID	Status date	Status
USCD1239/02	13-OCT-2011	Tested at NEADB

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10. REFERENCES

- D.R. Vondy, T.B. Fowler, G.W. Cunningham III:
The BOLD VENTURE Computation System for Nuclear Reactor Core Analysis, Version III. ORNL-5711 - June 1981.

USCD1239/02, included references:

- J-P. Renier, T.B. Fowler: VENTEASY USER'S MANUAL

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11. HARDWARE REQUIREMENTS: A PC with, ideally, 1GB or more of memory (RAM).

USCD1239/02

Tested at the NEA Databank on a Dell INTEL Duo E6550, 2.33 GHz (for Windows); DOS, under Windows XP Pro SP 3.

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12. PROGRAMMING LANGUAGE(S) USED