NAME OR DESIGNATION OF PROGRAM, COMPUTER, NATURE OF PHYSICAL PROBLEM SOLVED, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, FEATURES, AUXILIARIES, STATUS, REFERENCES, REQUIREMENTS, LANGUAGE, OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED, OTHER RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHOR, MATERIAL, CATEGORIES

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Program name | Package id | Status | Status date |
---|---|---|---|

SPACETRAN | CCC-0120/01 | Tested | 01-AUG-1974 |

Machines used:

Package ID | Orig. computer | Test computer |
---|---|---|

CCC-0120/01 | IBM 370 series | IBM 370 series |

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3. NATURE OF PHYSICAL PROBLEM SOLVED

SPACETRAN is designed to calculate the energy-dependent total flux or some proportional quantity such as kerma, due to the radiation leakage from the surface of a right-circular cylinder at detector positions located at arbitrary distances from the surface. The assumptions are made that the radiation emerging from the finite cylinder has no spatial dependence and that a vacuum surrounds the cylinder.

SPACETRAN is designed to calculate the energy-dependent total flux or some proportional quantity such as kerma, due to the radiation leakage from the surface of a right-circular cylinder at detector positions located at arbitrary distances from the surface. The assumptions are made that the radiation emerging from the finite cylinder has no spatial dependence and that a vacuum surrounds the cylinder.

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4. METHOD OF SOLUTION

There are three versions of the program in the code package.

SPACETRAN-I uses the surface angular fluxes calculated by the discrete ordinates SN code ANISN, as input.

SPACETRAN-II assumes that the surface angular flux for all energies can be represented as a function (COS(PHI))**N, where PHI is the angle between surface outward normal and radiation direction, and N is an integer specified by the user.

For both versions the energy group structure and the number and location of detectors is arbitrary. The flux (or response function) for a given energy group at some detection point is computed by summing the contributions from each surface area element over the entire surface. The surface area elements are defined by input data. SPACETRAN-III uses surface angular fluxes from DOT-3.

SPACETRAN-I handles contributions either from a cylinder 'end' or 'side', so the total contributions must be obtained by adding the results of separate end and side runs. ANISN angular fluxes are specified for discrete directions. In general, the direction between the detector and contributing area will not exactly coincide with one of these discrete directions. In this case, the ANISN angular flux for the 'closest' discrete direction is used to approximate the contribution to the detector.

SPACETRAN-II handles contributions from both the side and end of a cylinder in a single run. Since the assumed angular distribution is specified by a continuous function, it is not necessary to perform the angle selection described above.

For each detector specified, both versions compute the flux and a response proportional to flux in each energy group and also compute the sum of these quantities over all energy groups.

There are three versions of the program in the code package.

SPACETRAN-I uses the surface angular fluxes calculated by the discrete ordinates SN code ANISN, as input.

SPACETRAN-II assumes that the surface angular flux for all energies can be represented as a function (COS(PHI))**N, where PHI is the angle between surface outward normal and radiation direction, and N is an integer specified by the user.

For both versions the energy group structure and the number and location of detectors is arbitrary. The flux (or response function) for a given energy group at some detection point is computed by summing the contributions from each surface area element over the entire surface. The surface area elements are defined by input data. SPACETRAN-III uses surface angular fluxes from DOT-3.

SPACETRAN-I handles contributions either from a cylinder 'end' or 'side', so the total contributions must be obtained by adding the results of separate end and side runs. ANISN angular fluxes are specified for discrete directions. In general, the direction between the detector and contributing area will not exactly coincide with one of these discrete directions. In this case, the ANISN angular flux for the 'closest' discrete direction is used to approximate the contribution to the detector.

SPACETRAN-II handles contributions from both the side and end of a cylinder in a single run. Since the assumed angular distribution is specified by a continuous function, it is not necessary to perform the angle selection described above.

For each detector specified, both versions compute the flux and a response proportional to flux in each energy group and also compute the sum of these quantities over all energy groups.

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CCC-0120/01

File name | File description | Records |
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CCC0120_01.001 | SPACETRAN-1 SOURCE PROGRAM (FORTRAN) | 149 |

CCC0120_01.002 | SPACETRAN-1 SAMPLE PROBLEM | 33 |

CCC0120_01.003 | SPACETRAN-2 SOURCE PROGRAM (FORTRAN) | 133 |

CCC0120_01.004 | SPACETRAN-2 SAMPLE PROBLEM | 8 |

CCC0120_01.005 | SPACETRAN-3 SOURCE PROGRAM (FORTRAN) | 951 |

CCC0120_01.006 | SPACETRAN-3 SAMPLE PROBLEM | 16 |

CCC0120_01.007 | SPACETRAN-3 INPUT FOR DOT-3 (ID=RZ6) | 231 |

CCC0120_01.008 | SPACETRAN-3 JCL | 5 |

CCC0120_01.009 | SPACETRAN-1 OUTPUT OF SAMPLE PROBLEM | 127 |

CCC0120_01.010 | SPACETRAN-2 OUTPUT OF SAMPLE PROBLEM | 42 |

CCC0120_01.011 | SPACETRAN-3 OUTPUT OF SAMPLE PROBLEM | 103 |

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- G. Radiological Safety, Hazard and Accident Analysis
- J. Gamma Heating and Shield Design

Keywords: angular distribution, cylinders, doses, neutron flux, radiation effects.