On both sides of the Atlantic billions of dollars are being poured into developing small modular reactors. But it seems increasingly unlikely that they will ever be commercially viable. The idea is to build dozens of the reactors (SMRs) in factories in kit form, to be assembled on site, thereby reducing their costs, a bit like the mass production of cars. The problem is finding a market big enough to justify the building of a factory to build nuclear power station kits. For the last 60 years the trend has been to build ever-larger nuclear reactors, hoping that they would pump out so much power that their output would be cheaper per unit than power from smaller stations. However, the cost of large stations has escalated so much that without massive government subsidies they will never be built, because they are not commercially viable. To get costs down, small factory-built reactors seemed the answer. It is not new technology, and efforts to introduce it are nothing new either, with UK hopes high just a few years ago. Small reactors have been built for decades for nuclear submarine propulsion and for ships like icebreakers, but for civilian use they have to produce electricity more cheaply than their renewable competitors, wind and solar power. A number of companies in the UK and North America are developing SMRs, and prototypes are expected to be up and running as early as 2025. However, the next big step is getting investment in a factory to build them, which will mean getting enough advance orders to justify the cost. A group of pro-nuclear US scientists, who believe that nuclear technology is vital to fight climate change, have concluded that there is not a large enough market to make SMRS work. Their report, published in the Proceedings of the National Academy of Sciences, says that large reactors will be phased out on economic grounds, and that the market for SMRs is too small to be viable. On a market for the possible export of the hundreds of SMRs needed to reach viability, they say none large enough exists. In the UK, where the government in June poured £200 million ($263.8) into SMR development, a parliamentary briefing paper issued in July lists a whole raft of reasons why the technology may not find a market. The paper’s authors doubt that a mass-produced reactor could be suitable for every site chosen; there might, for instance, be local conditions requiring extra safety features. They also doubt that there is enough of a market for SMRs in the UK to justify building a factory to produce them, because of public opposition to nuclear power and the reactors’ proximity to population centres. And although the industry and the government believe an export market exists, the report suggests this is optimistic, partly because so many countries have already rejected nuclear power.
Climate News Network 27th July 2018 read more »