CCC-0453 DUST.

DUST, Albedo Monte-Carlo Simulation of Neutron Streaming in Multilegged Square Concrete Ducts

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: DUST.

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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
DUST	CCC-0453/01	Tested	25-FEB-1993

Machines used:

Package ID	Orig. computer	Test computer
CCC-0453/01	IBM 3033	DEC VAX 6000

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3. DESCRIPTION OF PROGRAM OR FUNCTION

DUST simulates the thermal neutron streaming through multilegged square concrete ducts.

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4. METHOD OF SOLUTION

DUST uses the albedo Monte Carlo method. The albedo data used are in the form of empirical formulae based on the measured doubly differential albedo data. Sampling of the reflected polar and azimuthal angles is done by the rejection method. Variance reduction devices such as Russian Roulette are used.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

The albedo data and the subroutines for sampling the reflected polar and azimuthal angles are specific for concrete ducts. The maximum number of legs (as specified by dimension statements) is 5 and the maximum number of dose points is 50. The dose points considered are only in the last leg of the multilegged duct.

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6. TYPICAL RUNNING TIME

For a square duct, 40 feet in length, DUST takes 0.05 seconds per history. Eight thousand histories give the dose within a 15% statistical error in the case of straight ducts. The sample problem requires 29.32 CPU seconds of execution time on the IBM 3033 computer.

CCC-0453/01

NEA-DB executed the test case included in this package on a DEC VAX 6000-510 computer in 0.55 CPU seconds.

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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-0453/01	25-FEB-1993	Tested at NEADB

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10. REFERENCES:

CCC-0453/01, included references:

- R. Indira, K.P.N. Murthy and R. Shankar Singh:
  Albedo Monte Carlo Simulation of Neutron Streaming Through
  Multilegged Ducts.
  FRG/01100/RP-217  (January 1982)

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11. MACHINE REQUIREMENTS

DUCT was developed on the IBM 370/155-II computer and tested at RSIC on the IBM 3033 computer.

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
CCC-0453/01	FORTRAN+ASSEMBLER

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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED

The IBM 370, on which DUST was developed, runs IBM OS/VS. The IBM 3033 used for testing runs the IBM OS/VS2 operating system. At RSIC, DUST was compiled using the IBM FORTRAN H Extended Enhanced compiler.

CCC-0453/01

VMS V5.4-2 (DEC VAX 6000).

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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

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15. NAME AND ESTABLISHMENT OF AUTHORS

Developed by:   Reactor Research Centre
                Kalpakkam
                Tamil Nadu, India
Contributed by:
                Radiation Safety Information Computational Center
                Oak Ridge National Laboratory
                Oak Ridge, Tennessee, U. S. A.

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16. MATERIAL AVAILABLE

CCC-0453/01

File name	File description	Records
CCC0453_01.001	Information file	48
CCC0453_01.002	JCL to execute DUST for IBM vers. (author)	23
CCC0453_01.003	JCL and control information (NEADB)	7
CCC0453_01.004	DUST FORTRAN IV source program IBM vers	1074
CCC0453_01.005	DUST FORTRAN source program (NEADB)	1099
CCC0453_01.006	RANDU and STIME (FORTRAN IV) sub. IBM vers.	42
CCC0453_01.007	ICLOCK function (assembler) IBM version	92
CCC0453_01.008	Sample problem input	23
CCC0453_01.009	Sample problem output (NEADB)	356
CCC0453_01.010	Sample problem output IBM version (RSIC)	356

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17. CATEGORIES

J. Gamma Heating and Shield Design

Keywords: Monte Carlo method, albedo, concretes, ducts, streaming, thermal neutrons.