Abstract
ITER neutronics model (Tokamak Complex) keeps evolving, and each development requires comprehensive transport analysis for verification and validation. The tokamak complex's bio-shield plugs are the main shielding barriers between the tokamak and the port cells. Therefore, shielding analysis and optimization for the bio-shield plugs are part of the key factors for ITER licensing. In this work, performance evaluation of two designed bio-shield plugs: IVVS-port cell #3 and TCP-port cell #4 in level B1 has been conducted. Neutron transport calculation analysis on the new designs (generic designs) showed total neutron flux of 1.71 × 106 n/cm2/s and 2.86 × 105 n/cm2/s respectively in a specified tally cell behind the IVVS and TCP bio-shield plug. Spatial neutron distribution behind the bios-shield plug (port cells) showed significant shielding improvement compared to the original IVVS and TCP bio-shield design. Further iterative optimized shielding scheme has been proposed to reduce the total neutron flux from 1.71 × 106 to 8.8 × 104 n/cm2/s and from 2.86 × 105 to 6.4 × 104 n/cm2/s for the respective tally cell behind IVVS and TCP bio-shield plugs.
| Original language | English |
|---|---|
| Article number | 111478 |
| Journal | Fusion Engineering and Design |
| Volume | 153 |
| DOIs | |
| State | Published - Apr 2020 |
| Externally published | Yes |
Funding
This work was supported by the ITER IO within the framework of a service contract [IO/17/CT/4300001602/ABN]. This work was also supported by the National Magnetic Confinement Fusion Science Program of China ( 2015GB116000 ); Informatization Project of Chinese Academy of Sciences ( XXH13506-104 ); Young Elite Scientists Sponsorship Program by CAST ( 2017QNRC001 ); the project of HIPS ( KP-2017-19 ). The authors would like to express their appreciation to the other members of the FDS team for providing an insightful discussion on all the aspects of SuperMC code functions. The joint support of World Academy of Science (CAS-TWAS)’s Ph.D. scholarship scheme is also appropriately acknowledged by the first author. This work was supported by the ITER IO within the framework of a service contract [IO/17/CT/4300001602/ABN]. This work was also supported by the National Magnetic Confinement Fusion Science Program of China (2015GB116000); Informatization Project of Chinese Academy of Sciences (XXH13506-104); Young Elite Scientists Sponsorship Program by CAST (2017QNRC001); the project of HIPS (KP-2017-19). The authors would like to express their appreciation to the other members of the FDS team for providing an insightful discussion on all the aspects of SuperMC code functions. The joint support of World Academy of Science (CAS-TWAS)’s Ph.D. scholarship scheme is also appropriately acknowledged by the first author.
| Funders | Funder number |
|---|---|
| The World Academy of Sciences | |
| Fondation du Souffle | |
| Chinese Academy of Sciences | XXH13506-104 |
| Hefei Institutes of Physical Science, Chinese Academy of Sciences | KP-2017-19 |
| China Academy of Space Technology | 2017QNRC001 |
| National Magnetic Confinement Fusion Program of China | 2015GB116000 |
Keywords
- Bios-shield plug
- ITER neutronics
- MCNP
- Shielding design
- SuperMC
