Monte Carlo transport calculations show that neutrons produced in a tokamak power plant can convert the abundant isotope 198Hg to stable 197Au via the (n,2n) channel, yielding several tonnes of gold per plant-year without compromising the tritium breeding ratio.
It looks that way.
Ah, so instead of beryllium using mercury as the neutron flux multiplier with the added benefit of turning it into gold. Neat.