### Abstract

Calculations of external γ-doses from radioactivity released to the atmosphere have been made using different dose buildup factor formulas. Some of the dose buildup factor formulas are used by the Nordic countries in their respective γ-dose models. A comparison of calculated y-doses using these dose buildup factors shows that the γ-doses can be significantly dependent on the buildup factor formula used in the calculation. Increasing differences occur for increasing plume height, crosswind distance, and atmospheric stability and also for decreasing downwind distance. It is concluded that the most accurate y-dose

can be calculated by use of Capo's polynomial buildup factor formula. Capo-coefficients have been calculated and shown in this report for γ-energies below the original lower limit given by Capo.

can be calculated by use of Capo's polynomial buildup factor formula. Capo-coefficients have been calculated and shown in this report for γ-energies below the original lower limit given by Capo.

Original language | English |
---|

Place of Publication | Roskilde, Denmark |
---|---|

Publisher | Risø National Laboratory |

Number of pages | 66 |

ISBN (Print) | 87-550-0739-2 |

Publication status | Published - 1980 |

Series | Risø-M |
---|---|

Number | 2204 |

ISSN | 0418-6435 |

### Keywords

- Risø-M-2204
- Buildup
- Dose rates
- Earth atmosphere, External irradiation
- Gamma radiation
- Mathematical models
- Meteorology
- Plumes
- Radiation doses
- Theoretical data

## Cite this

Jensen, P. H., & Thykier-Nielsen, S. (1980).

*Recommendations of dose buildup factors used in models for calculating gamma doses from a plume*. Risø National Laboratory. Risø-M, No. 2204