Quote: Atomic! Meanwhile Foreign Minister and probable next Coalition PM Julie Bishop has come out in favour of nuclear energy. Its an obvious conclusion that if you want to bring down your greenhouse gas emissions dramatically you have to embrace a form of low or zero-emissions energy and thats nuclear, the only known 24/7 baseload power supply with zero emissions, she said, in a statement that no-one especially asked for and that seems timed principally to give people something to talk about other than the Victorian election. Now, nuclear power doesnt emit greenhouse gases. It does, however, produce a lot of waste thats incredibly radioactive - uranium, plutonium, neptunium, californium - and we have zero idea of how to store it aside from bury it and walk away. Nuclear waste dumps are not unreasonably considered one of those things that absolutely everybody wants nowhere near them, making them a political nightmare. And while things dont generally go wrong in nuclear plants, those rare accidents tend to beome major disasters - as Fukushima and Chernobyl discovered to their considerable cost. However, theres another more immediate, practical reason why nuclear isnt a likely alternative for Australia: our energy industry now almost entirely consists of private companies, who are not going to build nuclear reactors. See, nuclear power plants take a long time to build. Depending on the design, construction takes between four and eight years, followed by six-to-twelve months of testing before it actually starts generating electricity. By comparison, building a wind farm takes six months. As a result reactors are also extraordinarily expensive and typically take decades to turn a profit. AGLs shareholders are very unlikely to back the company building something that wont provide any return until most of them are dead. So its not seriously going to happen in Australia. But theres another issue in there. Lets look at that baseload power thing The question of baseload revolves around the fact that people need power all the time including when theres no sun or wind. Thanks a bunch, nature. While this sounds at first blush like an insurmountable issue and is inevitably raised by people condescendingly dismissing renewable energy, its not that big an issue - and in fact the problem has already been solved. Mark Diesendorf and colleagues at the University of NSW did a comprehensive study of Australias electricity demand and discovered that It turns out that wind and solar photovoltaic are only unable to meet electricity demand a few times a year… Since the gaps are few in number and none exceeds two hours in duration, there only needs to be a small amount of generation from the so-called flexible renewables: hydro and biofuelled gas turbines. Concentrated solar thermal is also flexible while it has energy in its thermal storage. Then again, Bishops staying on message. After all, talking up nuclear energy is a great option if you want to move your political party away from your denialist position on climate change while still supporting the mining industry, doing nothing about reducing emissions, and keeping the conversation away from solar and wind. So: expect the Coalition to be banging on about it for the foreseeable. The cocktail hour: cities in dust Speaking of Chernobyl, CBS cameraman Danny Cooke posted video he shot of the abandoned city of Pripyat mere days ago. Its haunting stuff - especially his sweeping drone shots - and its a timely reminder of what nuclear energy can cost. Thats an entire city falling to ruin, right there. https://youtube/watch?feature=player_embedded&v=EcC54jTnX5I SEE smh.au/comment/view-from-the-street/view-from-the-street-bishop-goes-nuclear-20141130-11x4ns.html
Posted on: Sun, 30 Nov 2014 11:29:33 +0000