NEA-0636 BASKER/FLAKER.VIWI
VIWI, Neutron Speeds and Weights for Scattering Kernel Calculation
BASKER, Isotropic Scattering Kernel Calculation Using VIWI
FLAKER, Legendre Moments from Scattering Law Tables
NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROBLEM OR FUNCTION, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES OF THE PROGRAM, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED, OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHOR, MATERIAL, CATEGORIES
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| Program name | Package id | Status | Status date |
|---|---|---|---|
| BASKER/FLAKER | NEA-0636/01 | Arrived | 24-AUG-2001 |
| VIWI | NEA-0636/02 | Arrived | 24-AUG-2001 |
Machines used:
| Package ID | Orig. computer | Test computer |
|---|---|---|
| NEA-0636/01 | IBM 360 series | |
| NEA-0636/02 | IBM 360 series |
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3. DESCRIPTION OF PROBLEM OR FUNCTION
These three programs are concerned with scattering kernel calculations using energy points. The calculations are made using the speed rather than the energy variable as the functions considered vary generally more smoothly in the former variable. VIWI calculates the speed points and associated weights for all energy intervals. BASKER calculates the isotropic scattering kernel using the points and weights calculated by VIWI. FLAKER calculates the desired Legendre moments of the scattering kernel.
These three programs are concerned with scattering kernel calculations using energy points. The calculations are made using the speed rather than the energy variable as the functions considered vary generally more smoothly in the former variable. VIWI calculates the speed points and associated weights for all energy intervals. BASKER calculates the isotropic scattering kernel using the points and weights calculated by VIWI. FLAKER calculates the desired Legendre moments of the scattering kernel.
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4. METHOD OF SOLUTION
The variation of flux between energy points is accounted for using a Lagrange interpolation method. The speed points have been chosen with the suitability of Pu systems as a major goal. The calculated points and weights are written on file by VIWI, as well as the ordinary Gaussian points and weights.
BASKER uses the free gas or Brown-St. John model to calculate the isotropic scattering kernel. FLAKER calculates the Legendre moments using any tabulated scattering law (given as input).
The variation of flux between energy points is accounted for using a Lagrange interpolation method. The speed points have been chosen with the suitability of Pu systems as a major goal. The calculated points and weights are written on file by VIWI, as well as the ordinary Gaussian points and weights.
BASKER uses the free gas or Brown-St. John model to calculate the isotropic scattering kernel. FLAKER calculates the Legendre moments using any tabulated scattering law (given as input).
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8. RELATED AND AUXILIARY PROGRAMS
BASKER and FLAKER are modifications of BASK and FLANGE which are scattering kernel programs that use energy intervals.
BASKER and FLAKER are modifications of BASK and FLANGE which are scattering kernel programs that use energy intervals.
NEA-0636/01
FACELNEA-0636/02
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| Package ID | Status date | Status |
|---|---|---|
| NEA-0636/01 | 24-AUG-2001 | Masterfiled Arrived |
| NEA-0636/02 | 24-AUG-2001 | Masterfiled Arrived |
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NEA-0636/01, included references:
- Jorma Karppinen:"Scattering Kernel Calculations in the Energy Point Method,
Description of Programs VIWI, BASKER and FLAKER"
RAR 1973, Memo 6.
NEA-0636/02, included references:
- Jorma Karppinen:"Scattering Kernel Calculations in the Energy Point Method,
Description of Programs VIWI, BASKER and FLAKER"
RAR 1973, Memo 6.
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11. MACHINE REQUIREMENTS
VIWI requires a single input/output unit to output points and weights. BASKER requires 3 units:
Unit
17 speed points and weights calculated by VIWI
7 temporary storage for main and auxiliary kernels
25 calculated energy point kernels output.
FLAKER requires 7 units:
3 temporary storage
9 scattering law input
13 temporary storage for auxiliary kernels
8 temporary storage for main kernels
17 speed points and weights input
19 temporary storage for energy points and weights
25 output
VIWI requires a single input/output unit to output points and weights. BASKER requires 3 units:
Unit
17 speed points and weights calculated by VIWI
7 temporary storage for main and auxiliary kernels
25 calculated energy point kernels output.
FLAKER requires 7 units:
3 temporary storage
9 scattering law input
13 temporary storage for auxiliary kernels
8 temporary storage for main kernels
17 speed points and weights input
19 temporary storage for energy points and weights
25 output
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| Package ID | Computer language |
|---|---|
| NEA-0636/01 | FORTRAN-IV |
| NEA-0636/02 | FORTRAN-IV |
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NEA-0636/01
source program mag tapesource program mag tape SRCTPsource program mag tapesource program mag tape SRCTP
report RAR 1973, Memo 6 REPPT
NEA-0636/02
source program mag tapesource program mag tape SRCTPreport RAR 1973, Memo 6 REPPT
Keywords: Lagrange equations, kernels, legendre polynomials, scattering, scattering law.