Measurement and Analysis of Structural Activation in a Boiling Water Reactor
| Autor: | Yoshihisa Hayashida, Sachiko Hamajima, Tadashi Kajitani, Mikio Uematsu |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Nuclear and High Energy Physics
Chemistry Astrophysics::High Energy Astrophysical Phenomena Gamma ray Induced radioactivity Neutron temperature Nuclear physics Nuclear Energy and Engineering Neutron flux Neutron cross section Boiling water reactor Neutron Atomic physics Nuclear Experiment Reactor pressure vessel |
| Zdroj: | Journal of Nuclear Science and Technology. 37:816-820 |
| ISSN: | 1881-1248 0022-3131 |
| Popis: | Induced radioactivity of structural materials of a nuclear power plant introduces the possibility of exposure of workers. In order to assess evaluation accuracy of the induced radioactivity, measurements and calculations were performed for gamma-ray dose inside an irradiated reactor pressure vessel of a boiling water reactor. Neutron flux was calculated with two-dimensional Sn transport code DOT3.5 with RZ and RΘ models. Induced radioactivity was calculated with the ORIGEN-79 code, in which three-group activation cross section was produced considering neutron spectrum instead of the original ORIGEN-79 three-group constants. Calculated dose rate by DOT3.5 agreed well with the measured value, and calculational accuracy was improved by taking account of Θ dependence of neutron flux distribution and precise neutron spectrum in activation calculation compared to the calculation with a simplified method such as a single RZ model calculation of neutron flux and activity calculation with the three-group constants... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|