CCC-0119 ELBA. (Abstract last modified 01-MAY-1978)
1.
NAME OR DESIGNATION OF PROGRAM - ELBA. 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.
Machines used:
Package-ID Orig.Computer Test Computer
CCC-0119/01 IBM 370 series IBM 370 series
3.
DESCRIPTION OF PROBLEM OR FUNCTION - ELBA takes an incident isotropic electron flux with a given differential energy spectrum and calculates the dose rate received from bremsstrahlung produced in a plane aluminium shield placed in front of the receiver. There is an option to also calculate the electron dose rate from the same source.
4.
METHOD OF SOLUTION - The electron differential spectrum as a function of depth is inferred by assuming that electrons travel straight ahead and that distance travelled and energy are related by a range-energy relationship. The electron dose rate at a given depth is calculated by integrating, over energy and direction, the product of the electron flux, the stopping power, and the appropriate flux- to-dose rate conversion factor.
5.
RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM - There are limitations on the dimensions of certain arrays, but these dimensions probably can be increased to meet the user's requirements.
6.
TYPICAL RUNNING TIME - Estimated running time of the packaged sample problem on the IBM 7090: 13.8 minutes.
7.
UNUSUAL FEATURES OF THE PROGRAM - The code was written for the IBM 7094 using standard I-O units.
8.
RELATED AND AUXILIARY PROGRAMS - 9.
STATUS 10.
REFERENCES - 11.
MACHINE REQUIREMENTS - 12.
PROGRAMMING LANGUAGE(S) USED - 13.
OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED - 14.
OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS - 15.
NAME AND ESTABLISHMENT OF AUTHOR - Contributed by: 16.
MATERIAL AVAILABLE - 17.
CATEGORIES - Keywords: BREMSSTRAHLUNG, DOSE RATES, ELECTRONS, SHIELDS
Electron and Bremsstrahlung Dose Rate Code.
Program-name Package-ID Status
ELBA CCC-0119/01 Tested
The bremsstrahlung source is assumed to be plane and isotropic at a given depth. This source is defined as the integral over energy and direction of the product of photon energy, the differential bremsstrahlung spectrum from electrons of a given energy, and the electron flux differential spectrum. The differential bremsstrahlung spectrum is derived from the Born approximation cross section multiplied by a correction factor. The bremsstrahlung dose rate is obtained by integrating, over photon energy and slab volume, the product of the bremsstrahlung source, photon energy flux-to-dose rate conversion factor, buildup factor, and attenuation kernel. The buil-dup factor assumed is a plane isotropic buildup factor generate by Monte Carlo calculations. The integrations are performed by evaluating the integrand at the midpoint of each integration step, multiplying by the step width, and summing the result.
The incident electron spectrum, dose rate conversion factors, and range formula coefficients are input by the user. The buildup factor information is contained in three DATA statements in subroutine BURP.
CCC-0119/01: 01-MAY-1978 Tested at NEADB
- Martin O. Burrell, J.J. Wright, and John W. Watta, JR.,
"The Calculation of Electron and Bremsstrahlung Dose Rates",
NASA-SP-169(ANS-SD-5) pp. 529-538 (1968).
- Informal notes.
CCC-0119/01:
CCC-0119/01: FORTRAN-IV
Radiation Shielding Information Center
Oak Ridge National Laboratory
Post Office Box X
Oak Ridge, Tennessee 37830
CCC-0119/01:
CCC0119_01.001 SOURCE PROGRAM (F4,EBCDIC) 527 records
CCC0119_01.002 SAMPLE PROBLEM INPUT DATA (EBCDIC) 24 records
CCC0119_01.003 SAMPLE PROBLEM PRINTED OUTPUT 65 records
- G. Radiological Safety, Hazard and Accident Analysis
- J. Gamma Heating and Shield Design
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