Crops, fisheries, radioactive contamination, the whole system would lead to massive collapse after a decade. Sure, hardly anyone would die from the immediate impact of the annual nuclear meltdown, but once we start ticking off the body count of the millions dying to radiation poisoning and starvation, we might want to reconsider that path.
1. The total death impact from Chernobyl is roughly 4k people. There's some high end estimates like 985k, but those seem to assume that humans are snorting all the radioactive material.
2. The exclusion zone is 1k km, 1 a year would add up to 1M 'off limits', most of it indistinguishable from a natural park. About 2% of our land mass, assuming we don't smarten up and keep plants on previously 'disallowed' areas.
3. 1 Chernobyl/year is an absolute worst case scenario. Even if we multiplied our nuclear power 100 fold we wouldn't have that disaster rate, especially as we transition past the legacy plants the US uses now.
4. Estimates range from 4k to 93k deaths from the accident and resulting radiation. Meanwhile the death toll from coal in the USA alone is 10k..., and 170k world wide.