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NESC0712 TOODEE2/MOD3.

TWODEE-2/MOD3, 2-D Time-Dependent Fuel Elements Thermal Analysis after PWR LOCA

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1. NAME OR DESIGNATION OF PROGRAM:  WREM-TOODEE2/MOD3
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2. COMPUTERS
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Program name Package id Status Status date
TOODEE-2/MOD3 NESC0712/01 Tested 04-NOV-1981

Machines used:

Package ID Orig. computer Test computer
NESC0712/01 IBM 3033 IBM 3033
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3. DESCRIPTION OF PROBLEM OR FUNCTION

WREM-TOODEE2 is    a     two-
dimensional,   time-dependent,   fuel-element   thermal   analysis
program.  Its primary purpose is  to evaluate fuel-element thermal
response  during post-LOCA  refill and  reflood  in a  pressurized
water reactor (PWR).
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4. METHOD OF SOLUTION

TOODEE2  calculations are  carried  out in  a
two-dimensional  mesh  region  defined   in  slab  or  cylindrical
geometry by orthogonal  grid lines.  Coordinates which  form order
pairs are labeled  x-y in slab geometry, and  those in cylindrical
geometry are labeled r-z for the axisymmetric case and r-theta for
the  polar  case.  Conduction  and  radiation  are the  only  heat
transfer  mechanisms assumed  within the  boundaries  of the  mesh
region.   Convective  and  boiling heat  transfer  mechanisms  are
assumed at  the boundaries.   The program  numerically solves  the
two-dimensional, time-dependent,  heat conduction  equation within
the mesh region.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

WREM-TOODEE2
considers only  axisymmetric geometry  although the  equations for
slab and polar geometry are included in the program.
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6. TYPICAL RUNNING TIME

The  sample  problem  executes in  6  or  7
minutes on an IBM370/195.
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7. UNUSUAL FEATURES OF THE PROGRAM:
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8. RELATED AND AUXILIARY PROGRAMS

WREM-TOODEE2  was developed  from
the  earlier TOODEE  program.  It  is  part of  the Water  Reactor
Evaluation   Model  (WREM)   package  which   also  includes   the
RELAP4/MOD5 (NESC  Abstract 369) and  MOXY-EM (NESC  Abstract 551)
programs.
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9. STATUS
Package ID Status date Status
NESC0712/01 04-NOV-1981 Tested at NEADB
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10. REFERENCES:
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11. MACHINE REQUIREMENTS:
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NESC0712/01 FORTRAN-IV
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:   OS/360,370.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:
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15. NAME AND ESTABLISHMENT OF AUTHOR

                 G. N. Lauben
                 Division of Systems Safety
                 U. S. Nuclear Regulatory Commission
                 Washington, D.C.  20555
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16. MATERIAL AVAILABLE
NESC0712/01
File name File description Records
NESC0712_01.001 TOODEE SOURCE (F4) 6968
NESC0712_01.002 TOODEE SAMPLE PROBLEM INPUT 118
NESC0712_01.003 TOODEE SAMPLE PROBLEM OUTPUT 3120
NESC0712_01.004 TOODEE JCL AND INFORMATION 67
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17. CATEGORIES
  • G. Radiological Safety, Hazard and Accident Analysis

Keywords: fuel elements, heat transfer, r-theta, r-z, space-time, thermal reactors, two-dimensional, x-y.