NESC0559 SOFIRE-2

SOFIRE-2, Containment Temperature and Pressure During Na Pool Fire, 1-Cell or 2-Cell Analysis

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, REFERENCE, 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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1. NAME OR DESIGNATION OF PROGRAM: SOFIRE2 1- and 2-CELL

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2. COMPUTERS

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Program name	Package id	Status	Status date
SOFIRE-2	NESC0559/01	Tested	01-AUG-1974

Machines used:

Package ID	Orig. computer	Test computer
NESC0559/01	IBM 370 series	IBM 370 series

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3. DESCRIPTION OF PROBLEM OR FUNCTION

SOFIRE2 ONE  CELL, calculates
the consequences  of a sodium  pool fire  in a closed  vault.  Gas
pressure  in the  vault is  calculated  from the  gas density  and
temperature.  SOFIRE2 TWO  CELL, calculates the consequences  of a
sodium pool fire  in a vault connected to  a containment structure
through a restricted opening.  Cold gas flows from the containment
to the vault due to mass differences  while hot gas flows from the
vault to  the containment to  equilibrate pressures.   Pressure in
the  containment   is  calculated   from  the   gas  density   and
temperature.  In both programs the sodium burning rate is governed
by the rate of oxygen diffusion to the sodium surface.

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4. METHOD OF SOLUTION

Both  programs  use   the  finite  difference
method  to calculate  transient temperatures  in  a nodal  network
designed to simulate  a physical system (ONE CELL  program) or the
two cell geometry (TWO CELL program).

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

The ONE CELL
program has a total of 12 nodes available for system components,
while the TWO CELL program has a total of 16 nodes.

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6. TYPICAL RUNNING TIME

The ONE CELL program requires 1 minute for
a 12 hour real time problem, while the TWO CELL program requires
12 seconds for a 24 hour real time problem.

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7. UNUSUAL FEATURES OF THE PROGRAM:

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8. RELATED AND AUXILIARY PROGRAMS:

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9. STATUS

Package ID	Status date	Status
NESC0559/01	01-AUG-1974	Tested at NEADB

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10. REFERENCE

P. Beiriger, J. Hopenfeld, M. Silberberg, R. P.
Johnson, L. Baurmash, and R. L. Koontz, SOFIRE II User Report, AI-
AEC-13055, March 30, 1973.

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11. MACHINE REQUIREMENTS

134K bytes (ONE CELL program), 148K bytes
(TWO CELL program)

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
NESC0559/01	FORTRAN-IV

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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED: OS/360.

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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

A
dummy routine can be used for subroutine AICRT3, or the subroutine
may be replaced to utilize local graphics capabilities.

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15. NAME AND ESTABLISHMENT OF AUTHOR

                 Melvin Silberberg
                 Atomics International
                 P. O. Box 309
                 Canoga Park, California  91304

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16. MATERIAL AVAILABLE

NESC0559/01

File name	File description	Records
NESC0559_01.001	ONE-CELL CODE SOURCE PROGRAM (FORTRAN)	490
NESC0559_01.002	ONE-CELL CODE SAMPLE PROBLEM	37
NESC0559_01.003	TWO-CELL CODE SOURCE PROGRAM (FORTRAN)	571
NESC0559_01.004	TWO-CELL CODE SAMPLE PROBLEM	49
NESC0559_01.005	ONE-CELL CODE OUTPUT LIST OF SAMPLE PROB.	5325
NESC0559_01.006	TWO-CELL CODE OUTPUT LIST OF SAMPLE PROB.	2205

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17. CATEGORIES

G. Radiological Safety, Hazard and Accident Analysis

Keywords: accidents, containment, fires, reactor safety, sodium.