NEA-1698 SWAT.

SWAT, Step-Wise Burnup Analysis Code System to Combine SRAC-95 Cell Calculation Code and ORIGEN2

NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROGRAM OR FUNCTION, METHODS, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, 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: SWAT.

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2. COMPUTERS

To submit a request, click below on the link of the version you wish to order. Only liaison officers are authorised to submit online requests. Rules for requesters are available here.

Program name	Package id	Status	Status date
SWAT	NEA-1698/02	Arrived	21-SEP-2007

Machines used:

Package ID	Orig. computer	Test computer
NEA-1698/02	Linux-based PC

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3. DESCRIPTION OF PROGRAM OR FUNCTION

SWAT evaluates isotopic composition of spent nuclear fuel, especially for burnup credit issues by driving codes SRAC95 and ORIGEN2.1 or ORIGEN2.

SWAT is an automated driver code system. At the initial development phase, it was constructed by combining source programs of SRAC and ORIGEN2. To overcome the problem associated with code updates, SWAT chose to use system function of UNIX operating system to execute SRAC95 and ORIGEN2. So that, SWAT is independent of development and modification of SRAC95 and ORIGEN2.1.

In SWAT, ORIGEN2(82) or ORIGEN2.1 is used for burnup calculations using the matrix exponential method. An updated decay library is included in the distribution. SWAT uses SRAC95 for neutron spectrum and effective cross section calculation in 107 groups, using the collision probability method for given geometry and isotopic composition. One or two dimensional cell geometries are supported in SRAC95.

NEA-1698/02

The main purpose of new package is to run SWAT on several machines not supported in previous package (IA64 under Linux, Windows with cygwin and Sun, ...) and several commercial FORTRAN compiler (Intel, PGI, Fujitsu).

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4. METHODS

In calculating the problem-dependent cross section in SWAT, the total burnup history is divided into "burnup steps." Power, boric acid concentration, temperature of each region, and void ratio of coolant are given as history data. For each burnup step, the neutron spectrum and effective cross section are evaluated by SRAC95 using the information given in previous burnup calculation and cell geometry information. The user can select geometry options for the collision probability method in SRAC95.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Resonance absorption calculation with ultra-fine group cross section can not be directly applicable for 2D geometry.

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6. TYPICAL RUNNING TIME: Runtime depends on the geometry option, and burnup step.

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7. UNUSUAL FEATURES

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8. RELATED OR AUXILIARY PROGRAMS

SWAT2ORI2: Program package to produce ORIGEN2 library.
The SWAT distribution does not contain SRAC95. It must be requested as a separate package.

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9. STATUS

Package ID	Status date	Status
NEA-1698/02	21-SEP-2007	Masterfiled Arrived

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10. REFERENCES

- K. Suyama, H. Mochizuki and T. Kiyosumi:
"Revised Burnup Code System Swat: Description And Validation Using Postirradiation Examination Data," Nuclear Technology, Vol. 138, pp. 97 (May 2002).

NEA-1698/02, included references:

- K. Suyama, T. Kiyosumi, and H. Mochizuki:
Revised SWAT - The Integrated Burnup Code System
JAERI-DATA/Code 2000-027 (In Japanese) (2000)
- K. Suyama:
SWAT Installation Guide (March 14, 2003), informal English report
- K. Suyama:
Integrated Burnup Analyses Code System SWAT, Revisions from 2000 to 2007

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11. HARDWARE REQUIREMENTS

Sun SPARC Station 2,5,10/51,20/71
  OS         Sun OS 4.1.[3-4]+JLE
  Compiler   Sun FORTRAN 1.4

Sun ULTRA-1
  OS         Solaris 2.5.1
  Compiler   Sun WorkShop UNIV SPARC, 3.0
             (SPARC Compiler FORTRAN77 4.2)

Fujitsu AP3000
  OS         Solaris 2.5.1
  Compiler   Sun FORTRAN 4.0
             SPARC Compiler FORTRAN77

HP9000/735/125CRX
  OS         HP-UX A9.07
  Compiler   HP FORTRAN/9000

PC-UNIX
  OS         FreeBSD or Linux
  Compiler   g77

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12. PROGRAMMING LANGUAGE(S) USED

No item found

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13. SOFTWARE REQUIREMENTS

A Fortran 77 compiler is required. SWAT can be run on several Unix operating systems, and on PC running Linux and FreeBSD with g77.

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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

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15. NAME AND ESTABLISHMENT OF AUTHORS

    Kenya SUYAMA
    JAEA
    Tokai-mura, Naka-gun, Ibaraki-ken, 319-1195
    Japan

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16. MATERIAL AVAILABLE

NEA-1698/02

SWAT program
Sample problem files
SRAC, ORIGEN2, JENDL-3.2 material
decay data and cross section data from ORIGEN2(82), ORLIBJ32, ORLIBJ33
photon data files
actinides and fission products from BROND-2, ENDF/B-IV, JEF-2.1, JENDL-3.2,
JENDL-3.3
JAERI-DATA/Code 2000-027 (In Japanese)
swatinstallman.pdf SWAT Installation Guide
swat_2006_update.pdf (in Japanese)
swat revision 2007_r2.pdf (in English)

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17. CATEGORIES

D. Depletion, Fuel Management, Cost Analysis, and Power Plant Economics

Keywords: burnup, criticality, fission products, fuel management, isotopes.