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Radioactivity evaluation for the KSTAR tokamak.
- Source :
-
Radiation protection dosimetry [Radiat Prot Dosimetry] 2005; Vol. 116 (1-4 Pt 2), pp. 24-7. - Publication Year :
- 2005
-
Abstract
- The deuterium-deuterium (D-D) reaction in the KSTAR (Korea Superconducting Tokamak Advanced Research) tokamak generates neutrons with a peak yield of 2.5 x 10(16) 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 x 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 x 10(6) Bq kg(-1) in the carbon graphite of a plasma-facing wall.
Details
- Language :
- English
- ISSN :
- 0144-8420
- Volume :
- 116
- Issue :
- 1-4 Pt 2
- Database :
- MEDLINE
- Journal :
- Radiation protection dosimetry
- Publication Type :
- Academic Journal
- Accession number :
- 16604589
- Full Text :
- https://doi.org/10.1093/rpd/nci242