I found this article online, it is a bit old but seems relevant.
" Doctoral candidate Ben Heard said waste would be stored in a concrete building. A potential nuclear power plant would generate about 6250 tonnes of spent fuel in its 60 year life. This would generally need to be stored in a 9500m2 area.
Senator Edwards said some countries could be willing to pay up to $1 million a tonne to send used fuel rods to South Australia for storage."
http://www.news.com.au/finance/econ...ly-the-best-idea/story-e6frflo9-1227434737045
No idea on how much it would cost to build and run the facility but it seems yacheng might have something to stand on. I know nothing about Nuclear storage or if GBG would even win the contract, but the figures appear positive.