I'm not familiar with hydro, but in the U.S., the amount of money being put into the waste fund is one mill per kilowatt hour, which is a very small part of the electricity charge, so it has almost no impact on the economics of generating electricity from nuclear energy.
Likewise, another issue that is often talked about is tearing down the plant at the end of its life. That has been done in a number of jurisdictions and has been demonstrated to be very manageable in terms of the economics of the life cycle of power production. In Canada, the amount we pay into the fund is also quite small compared with the other costs that are incurred in generating nuclear electricity.