There’s a good deal of talk about power today: oil prices retaining their high levels in spite of Saudi offering to make up any shortfall due to Libya, nuclear back-tracking following the earthquake and tsunami in Japan, and so on.
How, the media seem to be asking, is the UK going to be able to generate sufficient power for its needs in an affordable manner?
Consequently, attention is turning increasingly to sustainable power – particularly as today (27th June), when much of the South East of the country saw temperatures break the 30C mark, was a day marked by the switching-on of the UK’s largest solar power plant, one near Wallingford in Oxford that is expected to generate nearly 700 megawatt-hours of electricity per year.
The trouble is, it’s just not the answer. Nor is wind, tide or any of the other “new technologies” being spoken about.
At present, around 75% of the UK’s maximum power generating capacity is from fossil fuel sources (oil, coal and gas). But, as we know, these resources are being depleted rapidly all over the world (and that’s apart from the well-documented problems of global warming being brought on through the use of fossil fuels). However, for any country – including the UK – to continue to see economic growth, its power requirements grow. In fact, it is estimated that the UK’s power generating capacity will have to increase by at least 25% in the next 10 years – and this figure may be low if oil reserve issues accelerate the necessity to move to electric vehicles.
“Green Technologies” such as wind and solar suffer from a major drawback – a lack of reliability and predictability (and that’s before looking at cost issues which are significant – huge government subsidies benefit the builders but have to be reclaimed from the tax-payer). The fact is that while they will generate power during periods when the wind blows and there is sufficient daylight, this is far from constant, and power is needed on a 24-hour basis. It’s simply impractical from a cost, space, etc., perspective to store such power (assuming you’re generating excess) to any great extent. Yes, the UK has some level of stored-power reserves (mainly using pumped storage technology), but this is limited to around 3% of maximum capacity at present and is unlikely to be able to be increased to any great extent. So, solar and wind generators need to be backed up by other technologies that can be switched on immediately the wind or light levels drop – effectively meaning a doubling of peak capacity.
Wave power and Tidal power technologies, although more constant, have not yet proven sufficiently scalable, nor reliable, to be of significant practical use either.
Hydro-electric power is well understood, but the UK geology does not really suit it – which is why only about 1% of current electrical power is from hydro-electric schemes here.
The only practical answer is nuclear.
I recognise that this is a highly emotive topic, particularly in the light of the recent events in Japan, but the facts are that today’s technology makes nuclear plants infinitely safer than just about any other form of power generation. Of course, care needs to be taken that they are not sited where natural disasters are likely to cause a breach of the all-important containment vessels, but the UK is fortunate in being extremely stable geologically, so this is not an issue.
Nuclear “waste” – the by-products – can now be safely processed to remove the contaminants and reuse the rods in existing plants, or to utilise other up-coming technologies such as fast-breeder and fusion which can utilise the waste products. Incidentally, Scientific America published an article showing fly-ash from coal-fired power plants pumps 100 times more radiation into the surrounding environment than any nuclear facility today…
France today generates something like 85% of its electricity, China is looking at 132 plants by 2030, Korea is planning to obtain 50% of its power from nuclear sources by 2020, as is Japan (still). The UK simply has no option but to embrace nuclear power – and to do so quickly – or face much higher utility bills and a “return to the dark age” as power shortages loom.
- Yes, Nuclear Reactors Can Be a Part of Our Future Energy Supply (woodgatesview.wordpress.com)
- Sites for new nuclear plants named (mirror.co.uk)