  The thermal performance of high heat flux components in a fusion reactor
could be enhanced significantly by the use of nanofluid coolants, suspensions
of a liquid with low concentrations of solid nanoparticles. However, before
they are considered viable for fusion, the long-term behaviour of nanofluids
must be investigated. This paper reports an experiment which is being prepared
to provide data on nanofluid stability, settling and erosion in a HyperVapotron
device. Procedures are demonstrated for nanofluid synthesis and quality
assessment, and the fluid sample analysis methods are described. The end
results from this long-running experiment are expected to allow an initial
assessment of the suitability of nanofluids as coolants in a fusion reactor.
