Imperial College London
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Dr Sam Humphry-Baker

Faculty of Engineering, Department of Materials

Lecturer in Ceramics
 
 
 
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Contact

 

s.humphry-baker

 
 
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Location

 

LM.04DRoyal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Humphry-Baker:2019:10.1098/rsta.2017.0443,
author = {Humphry-Baker, S and Smith, GDW},
doi = {10.1098/rsta.2017.0443},
journal = {Philosophical Transactions A: Mathematical, Physical and Engineering Sciences},
title = {Shielding materials in the compact spherical tokamak},
url = {http://dx.doi.org/10.1098/rsta.2017.0443},
volume = {377},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Neutron shielding materials are a critical area of development for nuclear fusion technology. In the compact spherical tokamak, shielding efficiency improvements are particularly needed because of severe space constraints. The most spatially restricted component is the central column shield. It must protect the superconducting magnets from excessive radiation-induced degradation, but also from associated heating, so that energy consumption of the cryogenic systems is kept to an acceptable level. Recent simulations show that tungsten carbide and its composites form an attractive class of neutron-attenuating materials. In this paper, the key structure–property relationships of these materials are assessed, as they relate to generic materials challenges for plasma-facing materials. We first consider some fundamental materials properties of monolithic tungsten carbide including thermal transport, mechanical properties and plasma interaction. WC is found to have generally favourable properties compared to metallic tungsten shields. We then report progress on the development of a new candidate cermet material, WC-FeCr. Recent results on its accident safety, thermo-mechanical properties, and irradiation behaviour are presented. This review also highlights the need for further study, particularly in the areas of irradiation damage and hydrogen trapping.
AU  - Humphry-Baker,S
AU  - Smith,GDW
DO  - 10.1098/rsta.2017.0443
PY  - 2019///
SN  - 1364-503X
TI  - Shielding materials in the compact spherical tokamak
T2  - Philosophical Transactions A: Mathematical, Physical and Engineering Sciences
UR  - http://dx.doi.org/10.1098/rsta.2017.0443
UR  - http://hdl.handle.net/10044/1/66337
VL  - 377
ER  -
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