| Autor: |
Hyunduk Kim, Hee-Seock Lee, Sukmo Hong, Minho Kim, Chinwha Chung, Changsuk Kim |
| Předmět: |
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| Zdroj: |
Radiation Protection Dosimetry; 2005, Vol. 116 Issue 1-4, p24-27, 4p |
| Abstrakt: |
The deuterium-deuterium (D-D) reaction in the KSTAR (Korea Superconducting Tokamak Advanced Research) tokamak generates neutrons with a peak yield of 2.5 × 1016 s-1 through a pulse operation of 300 s. Since the structure material of the tokamak is irradiated with neutrons, this environment will restrict work around and inside the tokamak from a radiation protection physics point of view after shutdown. Identification of neutron-produced radionuclides and evaluation of absorbed dose in the structure material are needed to develop a guiding principle for radiation protection. The activation level was evaluated by MCNP4C2 and an inventory code, FISPACT. The absorbed dose in the working area decreased by 4.26 × 10-4 mrem h-1 in the inner vessel 1.5 d after shutdown. Furthermore, tritium strongly contributes to the contamination in the graphite tile. The amount of tritium produced by neutrons was 3.03 × 106 Bq kg-1 in the carbon graphite of a plasma- facing wall. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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