what happens to the waste of this process?
It is disposed.
Nuclear power
Disposal of nuclear waste is often considered the most politically divisive aspect in the lifecycle of a nuclear power facility.
Presently, waste is mainly stored at individual reactor sites and there are over 430 locations around the world where radioactive material continues to accumulate.
Some experts suggest that centralized underground repositories which are well-managed, guarded, and monitored, would be a vast improvement.
There is an "international consensus on the advisability of storing nuclear waste in deep geological repositories", with the lack of movement of nuclear waste in the 2 billion year old natural nuclear fission reactors in Oklo, Gabon being cited as "a source of essential information today."
when did we first start using nuclear energy 1970's what is this power? It is a power that uses nuclear reactions that release nuclear energy to generate heat, which most frequently is then used in steam turbines to produce electricity in a nuclear power plant.
wiki:25692648
Nuclear power [SEP] Waste disposal
However, in Finland the Onkalo spent nuclear fuel repository is under construction as of 2015. The Waste Isolation Pilot Plant (WIPP) in New Mexico has been taking nuclear waste since 1999 from production reactors, but as the name suggests is a research and development facility. In 2014 a radiation leak caused by violations in the use of chemically reactive packaging brought renewed attention to the need for quality control management, along with some initial calls for more R&D into the alternative methods of disposal for radioactive waste and spent fuel. In 2017, the facility was formally reopened after three years of investigation and cleanup, with the resumption of new storage taking place later that year.