CCC-0485 BWR-LTAS.

BWR-LTAS, BWR Long Term Accident Simulation Program

NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROGRAM 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 AUTHORS, MATERIAL, CATEGORIES

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1. NAME OR DESIGNATION OF PROGRAM: BWR-LTAS.

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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
BWR-LTAS	CCC-0485/01	Tested	30-APR-1987

Machines used:

Package ID	Orig. computer	Test computer
CCC-0485/01	IBM 3033	IBM 3084

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3. DESCRIPTION OF PROGRAM OR FUNCTION

BWT-LTAS performs studies of specific accident sequences at Brown's Ferry Unit One: station blackout, small break LOCA primary injection, loss of decay heat removal, loss of vessel water injection, and anticipated transient without scram.

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4. METHOD OF SOLUTION

BWT-LTAS estimates the effects of operator actions on the timing and course of events during the part of the sequence leading up to, but not including, fuel damage. It documents the basis of the methods used to simulate the response of parameters in reactor vessel, primary coolant system, primary containment and other reactor systems.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM: BWT-LTAS is presently usable only for Brown's Ferry.

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6. TYPICAL RUNNING TIME: On the IBM 3033, the sample ran in 3 minutes.

CCC-0485/01

NEA-DB ran the test case included in this package on an IBM 3084 computer in 1 minute 47.5 seconds of CPU time.

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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
CCC-0485/01	30-APR-1987	Tested at NEADB

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10. REFERENCES:

CCC-0485/01, included references:

- R.M. Harrington and L.C. Fuller:
  BWR-LTAS: A Boiling Water Reactor Long-Term Accident
  Simulation Code
  ORNL/TM-9163, NUREG/CR-3764 (February 1985)
- R.M. Harrington:
  Modifications to BWR-LTAS since December 1984
  Informal Notes  (June 1985)

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11. MACHINE REQUIREMENTS:

CCC-0485/01

The test case ran on an IBM 3084 computer in 1208K bytes of main storage.

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
CCC-0485/01	FORTRAN-77

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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:

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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

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15. NAME AND ESTABLISHMENT OF AUTHORS

Oak Ridge National Laboratory
Oak Ridge, Tennessee

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16. MATERIAL AVAILABLE

CCC-0485/01

File name	File description	Records
CCC0485_01.001	BWR-LTAS Information file	69
CCC0485_01.002	BWR-LTAS Fortran source.	10620
CCC0485_01.003	BWR-LTAS JCL file .	12
CCC0485_01.004	BWR-LTAS Sample problem input data	52
CCC0485_01.005	BWR-LTAS Sample problem printed output	2098

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17. CATEGORIES

G. Radiological Safety, Hazard and Accident Analysis

Keywords: simulation.