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[Program Service | Recent programs]

NEA-1353 ALBEDO/ALBEZ. (Abstract last modified 28-OCT-1991)


ALBEDO ALBEZ, Gamma and Neutron Attenuation in Air Ducts

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Abstract Table of Contents:

NAME | COMPUTER | PROBLEM | SOLUTION | RESTRICTIONS | CPU | FEATURES | AUXILIARIES | STATUS | REFERENCES | REQUIREMENTS | LANGUAGE | OPERATING SYSTEM | OTHER RESTRICTIONS | AUTHOR | MATERIAL | CATEGORIES |

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1. NAME OR DESIGNATION OF PROGRAM - ALBEDO/ALBEZ. 
(Programs for the calculation of the attenuation of radiation in 
single and double bends). 


2. COMPUTER FOR WHICH PROGRAM IS DESIGNED AND OTHER MACHINE VERSION PACKAGES AVAILABLE -

To request or retrieve programs click on the one of the active versions below. A password and special authorization is required.

Explanation of the status codes.

Program-name         Package-ID  Status
ALBEDO/ALBEZ         NEA-1353/01 Tested

Machines used:
Package-ID     Orig.Computer                       Test Computer
NEA-1353/01    IBM PC                              PC-80386

3. DESCRIPTION OF PROGRAM OR FUNCTION - The programs ALBEDO and ALBEZ are used to calculate the attenuation of scattered radiation in straight or bent air ducts for gamma radiation (0.1-3 MeV) and fast neutrons (0.1-14 MeV). With the programs the following geometries can be treated:
- ALBEDO: straight ducts and ducts with one bend 
-  ALBEZ: ducts with two bends. 


4. METHOD OF SOLUTION - In the case of gamma radiation the calculations are based on the Compton effect. The energy and angle dependency of the energy of the scattered photons and the albedo factors for the scattering is based on generally available literature.
In the case of neutrons the programs are valid only for fast neutrons. This is the range of validity of the albedo factors in the literature which describe the energy and angle dependencies of the scattered fast neutrons. The loss of energy of the neutrons due to scattering at the surface is neglected.


5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM - The programs are restricted for gamma radiation to the energy range of 0.1 to 3 MeV. In the case of neutrons only fast neutrons can be treated in the range of 0.1 to 14 MeV. Furthermore, the albedos used in the codes are valid only for concrete ducts.


6. TYPICAL RUNNING TIME - Running time is strongly dependent on the division of source surface, scattering surfaces and receptor surface. Times can be as low as a few minutes. In the case of a very fine division of surfaces the running time could easily be an hour. Running time is also dependent on the speed of the PC.


7. UNUSUAL FEATURES OF THE PROGRAM - 


8. RELATED AND AUXILIARY PROGRAMS - 


9. STATUS
NEA-1353/01: 28-OCT-1991 Tested at NEADB


10. REFERENCES  - 
NEA-1353/01:
- A. Baran and M. Gruen:
  ALBEDO,ALBEZ - PC-Programs for the Calculation of the Attenuation
  of Radiation in Single and Double Bends
  (January 10, 1990).


11. MACHINE REQUIREMENTS - IBM-PC or compatible, mathematical coprocessor not required; code size would allow execution on a AT with 1.2 MB disk drive without a hard disk, but a hard disk is recommended.
NEA 1353/01: NEA-DB compiled the programs and executed the test cases included in this package on a PC/0386 with 80387 math- co-processor.


12. PROGRAMMING LANGUAGE(S) USED -
NEA-1353/01: FORTRAN-77 


13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED - The code was developed using Microsoft FORTRAN 5.0 without use of a mathematical coprocessor. The original system for the development was HP DOS 3.3. Code also runs on PC DOS and MS DOS.
NEA 1353/01: The programs were compiled with the Microsoft FORTRAN version 5.0 compiler running under MS-DOS 4.01.


14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS - 


15. NAME AND ESTABLISHMENT OF AUTHORS - 
          NUKEM GmbH 
          Geschaeftsgebiet Sicherheitstechnik 
          Industriestr. 13 
          D-8755 Alzenau, Federal Republic of Germany 


16. MATERIAL AVAILABLE -
NEA-1353/01:
NEA1353_01.001    Information file                                   61 records
NEA1353_01.002    Command file to compile and link ALBEDO             1 records
NEA1353_01.003    Command file to compile and link ALBEZ              1 records
NEA1353_01.004    ALBEDO Source file                                616 records
NEA1353_01.005    ALBEZ  Source file                                585 records
NEA1353_01.006    ALBEDO input file                                  38 records
NEA1353_01.007    ALBEZ  input file                                  58 records
NEA1353_01.008    ALBEDO output file                                216 records
NEA1353_01.009    ALBEZ  output file                                653 records
NEA1353_01.010    ALBEDO executable file                              0 records
NEA1353_01.011    ALBEZ  executable file                              0 records
NEA1353_01.012    DOS file-names                                     11 records


17. CATEGORIES  - 

- J.  Gamma Heating and Shield Design


Keywords: ALBEDO, ATTENUATION, DUCTS, GAMMA RADIATION, MULTIPLE SCATTERING, NEUTRON FLUX, NEUTRON REFLECTORS

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