Nuclear Energy (Financing) Bill (Second sitting)

Yvonne Fovargue Excerpts

Committee stage
Tuesday 16th November 2021 Public Bill Committees

[Alan Brown]

Q You say that the baseload argument does not stack up, but another argument is that nuclear is needed to compensate for the intermittency of renewables. How robust is that argument? Is there an argument that nuclear is not the right technology to complement the intermittency of renewables?

Professor Thomas: It is not the right technology. Both renewables and nuclear power are not flexible options. Nuclear power only makes any sense—if it makes any sense at all—if it is operated round the clock, with baseload at the maximum level it can work at. If the wind is not blowing, there is nothing you can do with a nuclear power plant to fill in the gap. Clearly, whichever way you go, nuclear or renewables, you will need flexible plants, which will probably be batteries and perhaps some demand-side response, to fill in those gaps. The worst thing of all would be to mix two inflexible sources, because you will get a time when nuclear is not available and renewables are not available, and then you will be in much worse trouble.

Mycle Schneider: There is this myth about nuclear power providing electricity 24/7. We have done a very detailed analysis of the French nuclear fleet for 2019—the year before covid—and it turned out that, basically, when the operator, EDF, starts an outage for maintenance and refuelling, it entirely loses control over the date and time it restarts. There are cases where there are 40 versions for the restart date and time. That does not really indicate that this is a 24/7 electricity-generating source. On the contrary, it means that even if we stick to the example of 40 revised dates and times, five of those were in the last 24 hours of that period. So not even 24 hours ahead was it possible for EDF to predict when 1,300 MW would be available to the grid or not. On the other hand, I think the whole concept of baseload is flying out of the window. As Stephen has said, what we need is flexibility. If we build up solar and wind massively, it means that a lot of that so-called baseload is already covered by those sources. It therefore becomes a competitive environment for certain times during the year and for certain times during the day. We need to fill in the gaps.

As the court of accounts has shown in its sensitivity analysis of the costs of nuclear power, the highest sensitivity is the productivity of the nuclear power plants. If the production levels go down, you increase costs significantly. We have seen over the past few years in France, but also obviously in the UK, lower production rates and therefore increased costs. That means that these reactors have become much less reliable. We have calculated that the average increase in 2019 over the expected outage time was 44%. It can be a planned outage of a week, and it turns out to be six months. That is not an exaggeration, we have cases like that.

[Chair]

We have been joined now by Doug Parr. Please introduce yourself.

Doug Parr: My name Dr Douglas Parr, and I am the policy director for Greenpeace UK. Apologies, I did not see the email that said that this session was starting early.

[Alan Brown]

Q In terms of alternate technologies, the Royal Society prepared a report that suggests that 11 GW of electricity generation could be provided by tidal stream technologies by 2050. We know that those streams already generate and connect into the grid up in Orkney. How realistic do we think that is, and is that the type of alternate technologies that the Government should be pursuing? I will start with Mycle, followed by Doug Parr and then Professor Thomas, please.

Mycle Schneider: I think I will pass that one on to my English-based colleagues who are better suited to answer.

Doug Parr: There are certainly opportunities in tidal energy, and, at a minimum, I would hope that the Government would seek to pursue them in the next renewable auction round. I think there are a variety of technologies, certainly including tidal and geothermal. In terms of the subject of the Bill, nuclear energy is seen to be always on, but the overall competition for the grid is going to be between dispatchable and available power, which ideally should be flexible as well, and the provision of storage from cheap renewable power. In that sense, we are talking about green hydrogen, alongside these other renewable sources; but in terms of my personal preference, yes, I would certainly want to see tidal as part of the mix.

Professor Thomas: We cannot prejudge whether tidal would be a useful technology until we have tried it out. We can look at nuclear and see that costs have gone up rather than down, and on the other hand we can look at offshore wind, and see that five years ago the cost was £140 a megawatt-hour and now we are down to £40 a megawatt-hour. I think it is an option that we need to test. Whether it will be a success, I do not know; we cannot judge that in advance. If it was a guaranteed certainty, I guess we would have done it, but we must try out all these options.