Companies like Copenhagen Atomics or Transmutex work on reactor concepts that can turn nuclear waste into energy and thereby reduce the amount of longlived nuclear waste. The process is called transmutation.
This market will resolve YES if such a reactor starts operation before 2030 - including research as well as commercial reactors. It will resolve NO if no such reactor starts operation before 2030.
I think you may want to clarify a bit what types of reactor running, and what type of burning count as a YES.
For example, currently, there are fast neutron reactors running (for example BN800 in Russia) that could in principle be net burners of minor actinides if fed the right fuel mixture. Is this a resolved into a YES if the Russians insert a needle of 241Am into an existing fast reactor and burn a fraction of it? Is it a YES if the same is done in a light-water reactor (where the burning is worse, or rather, where the ashes are essentially as bad)?