Is nuclear energy worth it all? There have been three arguments in favour of nuclear energy: clean, cheap and can provide electricity 24×7 (base load). Clean it is, assuming that you could take care of the ticklish issue of putting away the highly harmful spent fuel. But cheap, it no longer is. The average cost of electricity produced by the existing 22 reactors in the country is around ₹2.80 a kWhr, but the new plants, which cost ₹15-20 crore per MW to set up, will produce energy that cannot be sold commercially below at least ₹7 a unit. Nuclear power is pricing itself out of the market. A nuclear power plant takes a decade to come up, who knows where the cost will end up when it begins generation of electricity? Nuclear plants can provide the ‘base load’ — they give a steady stream of electricity day and night, just like coal or gas plants. Wind and solar power plants produce energy much cheaper, but their power supply is irregular. With gas not available and coal on its way out due to reasons of cost and global warming concerns, nuclear is sometimes regarded as the saviour. But we don’t need that saviour any more; there is a now a better option. The seas are literally throbbing with energy. There are at least several sources of energy in the seas. One is the bobbing motion of the waters, or ocean swells — you can place a flat surface on the waters, with a mechanical arm attached to it, and it becomes a pump that can be used to drive water or compressed air through a turbine to produce electricity. Another is by tapping into tides, which flow during one part of the day and ebb in another. You can generate electricity by channelling the tide and place a series of turbines in its path. One more way is to keep turbines on the sea bed at places where there is a current — a river within the sea. Yet another way is to get the waves dash against pistons in, say, a pipe, so as to compress air at the other end. Sea water is dense and heavy, when it moves it can punch hard — and, it never stops moving.
The Hindu 28th June 2019 read more »