Shielding Analysis for ITER Equatorial Port Cell During Blanket Replacement

ITER port cells are located outside the bio-shield of the Tokamak. During shutdown, the shielding blanket may be replaced and the radioactive blankets will be transported through equatorial port cells, increasing the radiation exposure in the gallery. To examine the dose rate in the gallery with res...

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Bibliographic Details
Published in:Journal of fusion energy 2015-08, Vol.34 (4), p.875-881
Main Authors: Yang, Qi, Li, Bin, Chen, Chao, Jiang, Jieqiong, Yu, Shengpeng, He, Tao, Loughlin, Michael
Format: Article
Language:English
Subjects:
Barrels
Cooling
Design engineering
Design optimization
Energy Systems
Mathematical analysis
Nuclear Energy
Nuclear Fusion
Original Research
Physics
Physics and Astronomy
Plasma Physics
Radiation
Radiation effects
Radiation measurement
Radiation shielding
Stainless steel
Sustainable Development
Tokamak devices
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Summary:ITER port cells are located outside the bio-shield of the Tokamak. During shutdown, the shielding blanket may be replaced and the radioactive blankets will be transported through equatorial port cells, increasing the radiation exposure in the gallery. To examine the dose rate in the gallery with respect to the dose limitation specified by ITER, the activation of typical shielding blanket was calculated using the cell based rigorous two-step method. Then the activated blankets were loaded in cask and moved to the port cell, the radiation level in the port cell and gallery during the worst case was calculated. The shielding capability of port cell door was analyzed and the design was optimized based on the present proposal. As shown from the results, the dose rate from cask is much higher than that from activated Tokamak. The main concern for port cell door should be the concrete lintel and penetrations through it, providing basis for further engineering design of the port cell shielding.
ISSN:0164-0313
1572-9591
DOI:10.1007/s10894-015-9893-8