{"id":1074,"date":"2015-10-09T19:21:43","date_gmt":"2015-10-09T19:21:43","guid":{"rendered":"http:\/\/blogs.sussex.ac.uk\/sussexenergygroup\/?p=1074"},"modified":"2015-10-09T19:38:57","modified_gmt":"2015-10-09T19:38:57","slug":"small-modular-reactors-a-real-prospect-by-gordon-mackerron","status":"publish","type":"post","link":"https:\/\/blogs.sussex.ac.uk\/sussexenergygroup\/2015\/10\/09\/small-modular-reactors-a-real-prospect-by-gordon-mackerron\/","title":{"rendered":"Small Modular Reactors \u2013 a real prospect? by Gordon MacKerron"},"content":{"rendered":"

Despite ongoing and major delays in financing Hinkley Point C, which would be the first new nuclear power station in the UK for over 25 years, enthusiasm for new nuclear power remains high in several quarters.\u00a0 This includes the Energy Technologies Institute (ETI), a public-private partnership between the UK Government and energy and engineering companies.\u00a0 It has just produced an \u2018insights\u2019 report on the future UK role of nuclear power.[1]<\/a><\/p>\n

Although the report is about all potential future nuclear technologies, it gives little attention to the large scale reactors that are the only currently feasible technology choice for nuclear.\u00a0 But in considering such reactors, it now believes that in its \u2018optimistic\u2019 scenario for the future (\u2018Clockwork\u2019) the possible feasible total capacity by 2050 of large reactors is 35 GWe, down from a previous maximum of 40 GWe.\u00a0 Given that the UK Government gave the green light for nuclear power back in 2008 and the earliest we are now likely to get any power from new reactors is around 2025, this would still be going some.<\/p>\n

What the report is really interested in exploring is the potential for Small Modular Reactors (SMRs), which ETI sees as potentially complementary to large reactors.[2]<\/a>\u00a0 SMRs are reactors of below 300 MWe, (some 4 or more times smaller than current designs), none of which yet exists, though there are many possibilities.\u00a0 ETI argues that 21 GWe of these SMRs might be in place by 2050, an apparently modest total compared to the 63 GWe of \u2018theoretical capacity\u2019 of SMRs for the same year.\u00a0 All this is in the context of the ETI\u2019s optimistic, high-growth scenario \u2013 its more pessimistic scenario (\u2018Patchwork\u2019) is not considered, so we are in an exclusively nuclear\u2013positive world.\u00a0 In this scenario, ETI seems to suggest that SMRs are a good prospect.<\/p>\n

However there are at least two serious problems \u2013 according to ETI\u2019s own account \u2013 that could prove destructive to the SMR ambition.<\/p>\n

The first is that ETI only expects that SMRs might be economically viable if there were a pre-existing district heating network at city-scale.\u00a0 SMRs could feed otherwise wasted heat from the nuclear reaction into this network – in addition to feeding electricity into the grid.\u00a0 But this network would already have to exist and have been paid for.\u00a0 The costs of adding this network to the costs of SMRs is, implicitly but clearly, enough to render SMRs economically unviable.\u00a0 There is no obvious reason to expect these multiple heating networks to be so conveniently available as a \u2018free good\u2019 to SMRs on so large a scale, if at all.<\/p>\n

Second there is the economic appraisal itself.\u00a0 Given that the construction costs of SMRs are yet entirely unknown, but will be dominant in overall costs, ETI is in a difficult position in trying to make a stab at what these costs might be.\u00a0 Its report says that its estimates are \u2018independent of any specific vendor estimates\u2019 and \u2018are not derived from the traditional bottom up application of established power plant cost breakdown structures\u2019.\u00a0 Unfortunately ETI does not say exactly how its cost estimates are derived, nor show any intermediate steps in this process.\u00a0 Given that there cannot be any commercial confidentiality issues involved because of the \u2018independence\u2019 of the estimates.\u00a0 This omission is unfortunate, especially in the light of chronic historic optimism in previous nuclear cost estimates, even when designs are well established.<\/p>\n

There are three further issues with the ETI report.\u00a0 The first is the assertion, muted but clear, that a major objective is for the UK to acquire full IPRs in any SMRs that might be deployed.\u00a0 While development of indigenous technology capabilities is generally desirable, the UK has no serious capabilities in SMRs at present.\u00a0 The acquisition of intellectual property rights (IPRs) would be a long and costly process and ETI do not clarify how this might be done.\u00a0 It would also seriously extend timescales and highlights tensions between climate change-derived urgency and other worthwhile objectives.\u00a0 Given that the UK has no ambitions to acquire IPRs for the three reactor types currently being pursued, it is not at all clear why this becomes so important for SMRs if low carbon is the dominant objective.<\/p>\n

Second there is the almost total neglect of the need for public engagement and consent for SMRs, especially as they would need to be sited relatively close to cities (so that the district heating systems would be viable). \u00a0This might or might not be a show-stopper but it certainly constitutes a major public acceptance risk and at the very least suggests that major delays are likely.<\/p>\n

Finally there is the unsupported assertion that \u2018action needs to be taken now if the option to deploy SMRs \u2026is not to be closed off\u2019, echoing similar remarks by the Select Committee on Energy and Climate Change a few months ago. [3]<\/a>\u00a0 This makes no sense at all.\u00a0 It would be much more prudent to wait and see whether other countries\u2019 proposed deployment of SMRs proves successful before premature commitments are made to a technology that is economically and socially high-risk.\u00a0 And if, as seems probable in a time of continuing reductions in public expenditure, no such supportive public action will be taken now,[4]<\/a> this kind of rhetoric may easily backfire.<\/p>\n

\"GordonSo what can we conclude from this report?\u00a0 It may reflect growing disillusion within the nuclear community with the large reactors currently proving so hard to finance and deploy.\u00a0 Whether this is the case or not, ETI \u2013 while advocating early development of SMRs in the UK \u2013 have in practice demonstrated quite how thin the current case for SMR pursuit really is.<\/p>\n

Gordon MacKerron<\/p>\n

[1]<\/a> Energy Technologies Institute Nuclear \u2013 the role for nuclear within a low carbon energy system <\/em>An insights report, October 2015<\/p>\n

[2]<\/a> Small Modular Reactors are a topic of recurring current interest.\u00a0 See ‘Small modular reactors \u2013 the future of nuclear power?’ – A\u00a0blog by Gordon MacKerron and Phil Johnstone, 2 March 2015<\/a><\/p>\n

[3]<\/a> \u00a0House of Commons Energy and Climate Change Committee Small nuclear power <\/em>4th<\/sup> report, Session 2014-2015, HC 347, 17 December 2014<\/p>\n

[4]<\/a> The Government\u2019s response to the Energy and Climate Change Committee cited above makes no commitment to significant expenditure, instead concentrating on further studies.\u00a0 House of Commons Energy and Climate Change Committee Small nuclear power \u2013 Government response to the Committee\u2019s 4th<\/sup> report,\u00a0 <\/em>Session 2014-2015, HC 1105 5 March 2015<\/p>\n

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Despite ongoing and major delays in financing Hinkley Point C, which would be the first new nuclear power station in the UK for over 25 years, enthusiasm for new nuclear power remains high in several quarters.\u00a0 This includes the Energy…<\/span><\/p>\n

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