last modified: 01-JAN-1969 | catalog | categories | new | search |

NESC0325 2-DB.

2-DB, 2-D MultiGroup Diffusion, X-Y, R-Theta, Hexagonal Geometry Fast Reactor, Criticality Search

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1. NAME OR DESIGNATION OF PROGRAM

2DB

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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
2-DB NESC0325/02 Tested 01-JAN-1969

Machines used:

Package ID Orig. computer Test computer
NESC0325/02 IBM 360 series IBM 360 series
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3. DESCRIPTION OF PROBLEM OR FUNCTION

2DB is a flexible, two-dimensional (x-y, r-z, r-theta, hex geometry) diffusion code for use in fast reactor analyses. The code can be used to:

 

  1. Compute fuel burnup using a flexible material shuffling scheme.

  2. Perform criticality searches on time absorption (alpha), material concentrations, and region dimensions using a regular or adjoint model. Criticality searches can be performed during burnup to compensate for fuel depletion.

  3. Compute flux distributions for an arbitrary extraneous source.

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4. METHOD OF SOLUTION

Standard source-iteration techniques are used. Group rebalancing and successive overrelaxation with line inversion are used to accelerate convergence. Material burnup is by reactor zone. The burnup rate is determined by the zone and energy (group) averaged cross sections which are recomputed after each time-step. The isotopic chains, which can contain any number of isotopes, are formed by the user. The code does not contain built-in or internal chains.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Since variable dimensioning is employed, no simple bounds can be stated. The current 1108 version, however, is nominally restricted to 50 energy groups in a 65K memory. In the 6600 version the power fraction, average burnup rate, and breeding ratio calculations are limited to reactors with a maximum of 50 zones.

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6. TYPICAL RUNNING TIME

A keff calculation with a 30x30 mesh and 4 energy groups requires approximately one minute. A typical burnup calculation requires roughly twice the machine time of a keff calculation.

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7. UNUSUAL FEATURES OF THE PROGRAM

The input data are arranged so the code can be easily used for keff and search calculations without burdening the user with burnup parameters.

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8. RELATED AND AUXILIARY PROGRAMS

The input data (e.g., cross sections, flux dumps, geometry, and composition specifications) are compatible with the Los Alamos one- and two-dimensional transport codes, DTF4 (NESC Abstract 209) and 2DF, and the Battelle perturbation code, PERT4 (NESC Abstract 304). All four codes use the same input module. The logical flow of 2DB is patterned after the 2DF code.

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9. STATUS
Package ID Status date Status
NESC0325/02 01-JAN-1969 Tested at NEADB
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10. REFERENCES
  • W.W. Little, Jr. and R.W. Hardie,
    2DB, A Two-dimensional Diffusion-Burnup Code for Fast Reactor Analysis, BNWL-640, January 1968, Addendum and Errata, April 12, 1968.

  • T.J. Hirons and R.D. O'Dell,
    CDC-6600 Version of 2DB, A Two-dimensional Diffusion-burnup Codefor Fast Reactor Analyses, LASL Note K-1-l-776, February 5, 1969.

  • K.D. Lathrop,
    DTF-IV, A FORTRAN-IV Program for Solving the Multigroup Transport Equation with Anisotropic Scattering, LA-3373, July 15, 1965.

  • 2DF, A Two-dimensional Transport Code from the Los Alamos
    Scientific Laboratory (unpublished).

  • R.W. Hardie and W.W. Little, Jr.,
    PERT-IV, A Two-dimensional Perturbation Code in FORTRAN-IV, BNWL-409, April 1967.

NESC0325/02, included references:
- W.W. Little, Jr. and R.W. Hardie:
  2DB Users Manual, Revision 1
  BNWL-831, Rev. 1, (February 1969).
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11. MACHINE REQUIREMENTS

65K memory and three peripheral storage devices.

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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NESC0325/02 FORTRAN-IV
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15. NAME AND ESTABLISHMENT OF AUTHORS

1108   W. W. Little, Jr. and R. W. Hardie
       Pacific Northwest Laboratories
       Battelle
       P. O. Box 999
       Richland, Washington 99352, USA
6600   T. J. Hirons and R. D. O'Dell
       Los Alamos Scientific Laboratory
       P. O. Box 1663
       Los Alamos, New Mexico 87544, USA

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16. MATERIAL AVAILABLE
NESC0325/02
File name File description Records
NESC0325_02.001 SOURCE 360/65 2804
NESC0325_02.002 SUBROUTINES ETIME,NTRAN & DATA INPUT 130
NESC0325_02.003 OUTPUT 1663
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17. CATEGORIES
  • C. Static Design Studies
  • D. Depletion, Fuel Management, Cost Analysis, and Power Plant Economics

Keywords: criticality searches, depletion, diffusion equations, multigroup, r-theta, r-z, reactivity, two-dimensional, x-y.