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Nuclear - future for Ireland?

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  • Registered Users Posts: 5,036 ✭✭✭Shoog


    Peak uranium is a well described concept.

    In the case of peak oil, in becomes uneconomically viable to extract after 50% of the known reserves are consumed. I imagine the same model applies to uranium.

    Hence the switch to the more abundant Thorium and Fast Breeders - both unproven commercial concepts.



  • Moderators, Motoring & Transport Moderators, Technology & Internet Moderators Posts: 22,716 Mod ✭✭✭✭bk


    One thing that I think some people have failed to realise is that the concept of large centralised base load generators is now an outdated concept and largely dying out!

    The name of the game now is decentralised and highly responsive.

    Generating technologies that are only good for base load and aren’t responsive have become uncompetitive. It is this that killed coal, it is only useful for base load, but not much else. The responsiveness and flexibility of gas really killed it off. It wasn’t even environmental issues, just cost and flexibility.

    But even within the gas plant market, we are even seeing the more base load type generators struggle, the closed cycle gas generators are struggling against more flexible open cycle and even gas piston types with fast startup times.

    We are basically quickly moving to a market where the renewables are the primary source of electricity and gas acts as more of a backup when needed, rather than a primary driver. There is basically no place for traditional “base load” in these type of grids.

    Of course this is terrible news for Nuclear which is very “base load” oriented. Yes technically Nuclear can be redesigned to be more responsive, but the economics don’t work in Nuclears favour. The super high up front capital cost of Nuclear means it only makes economic sense to build it if you use it all the time.



  • Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 91,570 Mod ✭✭✭✭Capt'n Midnight


    Ah Thorium, 80 years later and we still don't have reactors that should stretch the fuel by about 30% a far cry from the doubling needed to start a cycle in a reactor and more than doubling needed to produce fuel for additional reactors.

    Series production of plutonium breeder reactors started in 1944 to produce material for atomic bombs.

    In July, 1944, the U.S. delivered to Canada a few irradiated rods of
    uranium (containing plutonium), and of thorium (containing U-23
    3).

    IIRC the Canadians started testing Thorium in their Zeep reactor back in 1947

    Thorium is not untested, it's been disproven at scale in Indian Point, Shippingport, Fort St Vrain, THTR-300 etc. etc.



  • Registered Users Posts: 1,578 ✭✭✭KrisW1001


    Thorium cycle reactors were sidelined because they couldn't be used to offset the cost of making weapons-grade fissile material.

    If the goal had been solely to provide electrical power from nuclear fission, then Thorium was the best candidate: it produces reaction temperatures comparable to coal or oil (Uranium will just about boil water, which is why Uranium plants have to be so enormous), it won't melt down and the waste products have sort half-lives. However, you can't make a bomb out of any part of the Thorium cycle, so in the 1950s, it wasn't of use.



  • Registered Users Posts: 5,036 ✭✭✭Shoog


    The problem is it's not self sustaining so you either need a particle accellerator or uranium additives to make it work. Since compact neutron accellerators don't exist - you have to use uranium. This means you lose the non-proliferation benefits of Thorium and contaminate the waste stream to boot.



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  • Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 91,570 Mod ✭✭✭✭Capt'n Midnight


    The reaction temperatures are generally limited by the things like the physical properties of the materials used in the fuel rods , the phase changes of metals that have an accompanied volume change, and if using water the critical point of water etc.

    European fluidised bed coal plant runs hotter and hence more efficiently than the old US stuff. Oil in a gas turbine gets way hotter and is even more thermally efficient than anything to do with steam, and you can use the exhaust to raise seam to get power too. ( Combined Cycle Gas turbines can have as little as a quarter of the emissions of old coal)

    Thorium produces Uranium 233. It's difficult to handle because you also get U232 which spews out gamma rays and has a half life of 68.9 years.

    Apart from that it's ideal for weapons. Critical mass with reflectors is only 4 or 5 Kg based on a critical mass of 15Kg without reflectors.

    For a low tech crude gun type device you'd need more than the critical mass but and I may be mistake I seem to remember you wouldn't even need explosives, just a drop from 5 meters.

    You could bypass a lot of the gamma risks with automation, remote working with lots of cheap webcams or use older people or fanatics.



  • Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 91,570 Mod ✭✭✭✭Capt'n Midnight


    Spain stopped approving new nuclear plants a long, long time ago. In June 1984, the Congress of Deputies approved the 1983 National Energy Plan (PEN-83) Spain's entry into nuclear power was in a different time with a different political system. There was an attempted coup d'etat in 1981 before things settled down.

    Now all seven of the existing plants have shutdown dates between 2027 and 2035.

    Like Sweden and Switzerland, Spain gets lots of power from hydro. And nuclear never displaced coal in Spain, renewables did.



  • Registered Users Posts: 15,116 ✭✭✭✭charlie14


    I and other have been asking for quite a while now off anyone favouring this 37GW offshore/hydrogen 2050 plan, (that will not even come close to providing Eirgrid`s predicted needs for Ireland in 2050), how much it would cost and not a single one, and that includes Eamon Ryan, can give an answer.

    So where are you getting this, "no project is ever commenced without an agreed budget cost" Last year four wind farms were awarded contracts under this project so by your assertion then the budget cost of this project must be know, so what is it ?

    In the world of greens there is this belief that everything they favour will will come in on time and at the agreed contract price. Recent events have show that to be very far from reality. 60% - 70% increase in the cost of offshore resulted in wind companies worldwide pulling out of contracts until they were guaranteed higher prices. The two most recent of these re-negotiated contracts were with Orsted and Equinor for their Empire Wind and Sunshine Wind offshore fixed wind farms in the U.S. The original strike price for both was $83.30 per MWh. New strike price price $150.15 per MWh, an increase of over 80%. Offshore wind projects in the U.S. also receive $50 per MWh in tax benefits, so that leaves both those wind projects with a capacity factor less than half that of nuclear and a life span of one third having a strike price higher than the highest strike price those here oppossed to nuclear keep shouting about as to why nuclear is soooo much more expensive than offshore wind. And these strike prices are for fixed turbines, not the much more expensive floating variety that make up 25% of their preferred option.

    I have no idea what metric yiu are using to claim that compared to offshore nuclear that would provide over 30% of our current needs for €11 billion is not good value, but it`s not economics.

    Eirgrid predictions for 2050 is our demand rising by 250%. Based on a nuclear power plant that cost €11 billion even while being years late and over budget that was years late would provide 100% of our 2050 needs for roughly €85 bllion. Compare that to a wind/hydrogen plan that not only would not provide for our 2050 requirements for the capital cost of the offshore section alone would cost in the region of €200 billion with additional capital costs every 20 odd years compared to a one off covering 60 years for nuclear, then wind/hydrogen make no economic sense.



  • Moderators, Motoring & Transport Moderators, Technology & Internet Moderators Posts: 22,716 Mod ✭✭✭✭bk


    Your €11 Billion figure for a new Nuclear Power planet in Ireland is pure fantasy!

    Hinkley Point C is currently running at £35bn, €41 Billion!

    And that doesn't include the cost of a nuclear waste repository, which Sweden are currently building at a cost of €20 Billion and rising!



  • Registered Users Posts: 5,036 ✭✭✭Shoog


    https://www.afr.com/companies/energy/nuclear-awakening-a-decade-or-two-late-says-aer-20240716-p5ju8q A bit of realism from the Australian energy regulator - a lead time of at least 25years for any nuclear power for Auz. Entirely comparable to the situation in Ireland. To little to late.



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  • Registered Users Posts: 1,578 ✭✭✭KrisW1001


    You obviously know the names of those four projects, so use a Web search with those names and the word "cost" and you'll find some details. I'm not keen to do your research for you, especially if you give me zero information to start from.

    I did not say the cost had to be public, just that it's agreed and known beforehand, but when the government is directly buying the plant (as was the case in Olkiluoto 3) it will be published up front. These windfarm projects are different, in that private companies are going to build the arrays with their own money and make the profit by selling electricity.. in that case, the exact cost is commercially sensitive, but you can get within 30% of it by looking at the other figures involved and applying typical industry profit margins.

    Ask yourself, though: why has no nuclear plant producer ever entered into this kind of contract with a government? Whatever could it be that stops a nuclear provider from taking on all of the build costs in exchange for a small markup on the produced energy?

    If we could get an Olkiluoto 3-sized plant built here for €3 billion, I'd actually be in favour of it. Even at €5–8 bn, it would be worth investigating. But the truth is, nobody can deliver at that price, and the trend is only upwards. When the trend reverses, and nuclear shows a downward price slope, then we could look at it, but I wouldn't hold my breath...



  • Registered Users Posts: 1,156 ✭✭✭gjim


    This whole framing of the cost issue by the nuclear fluffers just demonstrates their complete miscomprehension of how modern electricity markets work in Europe - particularly since the 1996 directive and the follow-up in 2007. Like their firm belief that generation technology stopped advancing sometime in the 1970s, nothing that has happened in the electricity markets in last 40-50 years is comprehensible to them. That's why they'll bang on about "base-load" - a completely obsolete concept, they won't understand the economic reasons why the average size of steam based generation facility (coal and nuclear) were forced to expand into to the 1GW+ range to compete, why gas turbines are different/smaller and subsequently killed off growth in steam/thermal, or why the world has now switched to renewables and batteries with 90% of global investment into electricity generation going into renewables last year. Similarly the idea that generation capacity is nearly all built and financed privately these days is befuddling. Some of these companies make big profits, some have gone bust. Not a single one anywhere in the entire world has considered building a nuclear plant.

    Would you mind clearing up one thing Charlie? Are you - like every other proponent of nuclear in this thread - also skeptical about AGW?



  • Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 91,570 Mod ✭✭✭✭Capt'n Midnight


    I'd even argue that we shouldn't even take a free Olkiluoto 3 plant simply because we'd still have to rollout alternative low emissions generators while waiting for it to be constructed. And have to pay for massive amounts of grid upgrades for backup for if/when it's offline. And we'd still have to pay the end of life costs.

    With Solar Farms you get a return on outlay very soon as they are very quick to install. And you can do it in phases so very little capital tied up. Cost overruns ~ 1% so they aren't potential money pits. Solar farms are good for 40 years.

    The target is 8GW solar by 2030. Demand today was 4GW from 8am to 8pm so even at 50% output (50% cloud cover?) that much solar could have met demand for large parts of the day. So much for year round baseload.

    Nuclear means you have to wait ages to see any return. You could have invested in multiple solar and wind farms each in turn creating an income stream. And they don't see average cost overruns of ~ 120% (doubling ever 10 years is rule of thumb) or see cancellation rates of 50% (USA's new reactors and the last of the series produced ones).

    With wind and solar if there is a delay you can probably keep the old generators online for a year or two extra at the worst.

    With nuclear frequently having decade long delays this isn't an option. So costs for nuclear must also include costs for at least the refurbishment of old generators to modern emissions standards. It's arguable that the subsidies for converting Drax from coal to biomass and future carbon sequestration wouldn't need to be incurred if there wasn't a shortfall from Hinkley-C.



  • Registered Users Posts: 15,116 ✭✭✭✭charlie14


    Fantasy compared to what, a plan that those who support it cannot even put a figure on that will with all the hydrogen add-ons will be in the region of at least €250 Billion, with further unknown capital costs every 20 years for a population of 5 million that will not even meet the Eirgrid projection of our requirements ?



  • Registered Users Posts: 15,116 ✭✭✭✭charlie14


    Ireland is not following global trends. We are following a plan of all eggs in the one basket based on wind with hydrogen as back-up due to wind being intermittent and unreliable.

    This idea that somehow we are going to be a global exporter of wind power is a myth. We have a wind/hydrogen plan for 2050 that will not even provide our own projected needs, let alone having anything to export. Even if other European countries wanted it as they can get what the may need much cheaper elsewhere. French and Swedish nuclear being two.

    If I was extolling wind energy China would not the example I would choose. 2023 35% of China`s electricity was supplied by renewables. Just 16% of that was from wind and solar. The other 65% was provided by fossil fuels. Demand in China grew by 6.9% in 2023. Wind and solar didn`t even keep pace with demand covering just 46% of that rise in demand with coal making up the the other 54%. 2023 China`s power sector emissions rose by 5.9%. 6 times the global increase. Source: Ember.

    2023 China began construction of an additional 70GW of new coal burning plants. Source : Carbon Brief 11/4/2024



  • Registered Users Posts: 15,116 ✭✭✭✭charlie14


    That`s a rather strange statement "When the trend reverses, and nuclear shows a downward price slope, then we could look at it." The trend right now is wind costs rising by 60% - 70% with the two recent Osted and Equinor strike prices in the U.S. both increased by over 80%. To follow your logic then isn`t it time to look at the trend for wind ? And why look at it favourable for nuclear at €3, or €5 -8 Bn. when the example of Olkiluoto 3 sized plant, built at a cost of €11 Bn. even with time and budget over-runs, would provide our projected needs for 2050 for roughly €80 Bn. compared to a 37 GW plan which would cost at least x3 times that and would still not meet our 2050 projected needs ?

    As I said earlier, whatever opponents may have towards nuclear it`s certainly not based on economics.

    I wasn`t looking for all the individual cost of offshore wind farms or the associated hydrogen. I was asking for the overall cost of the 37GW plan. There is nothing commercially sensitive in that, and as nobody other than the consummer is going to end up carrying the can for that cost then is it not information that the consummer should be entitled to have ? Or is it simply the case, that like supporters of this plan here, we are looking at an open cheque book based on an ideology that nobody, the relavant Minister included, has even a clue as to the can consummers will end up carrying in electricity prices and the resulting harm to our economy due to those electricity prices.



  • Moderators, Motoring & Transport Moderators, Technology & Internet Moderators Posts: 22,716 Mod ✭✭✭✭bk


    LMAO so your €11 Billion figure comes from OL3!

    Construction started in 2003, most of the construction was complete by 2010, when they installed the reactor, it just took them more then a decade to get it working. So most of the construction costs was from the 2000's

    Well unfortunately capital costs have at least doubled if not tripled since then, so a 11billion reactor back then would easily cost in the region of 22 to 33 Billion if you are to start today. Plus interest rates are much higher now. You can easily see that reflected in the cost of Hinkley Point C €41 billion and counting!

    Also keep in mind OL3 was building in a pre-existing Nuclear power plant, with all the supporting infrastructure, waste storage pools, security, fire fighting, admin buildings, etc. Putting a new reactor in an existing plant is much cheaper then having to build all that from scratch, like we would in Ireland.

    Plus 20bn+ for a long term storage facility like Sweden is building.

    It says a lot that Finlands experience with OL3 was so great that they cancelled OL4 and another reactor and instead have said that all future investments will be in renewables!



  • Registered Users Posts: 1,578 ✭✭✭KrisW1001


    ... and the answer to why no nuclear supplier is willing to offer their services under the same DFBO (Design, Finance, Build, Operate) model as the windfarms is..?



  • Registered Users Posts: 14,380 ✭✭✭✭ednwireland


    So I'm in Finland, just fired up their 3rd nuclear plant, electric is a tenth of what it is at home (was staying with a mate)



  • Registered Users Posts: 15,116 ✭✭✭✭charlie14


    Alternatively LMAO at someone who has so much knowledge on nuclear costs yet cannot even give an estimate for a 37GW plan they favour would cost that would not even meet the projected needs who keeps rattling on about increased construction costs and Hinkley while seemingly oblivious that costs for offshore have gone through the roof to the extent that now strike prices for just fixed turbines with a lifespan one third of nuclear and a capacity factor less than half are higher than Hinkley.

    You also appear to have missed the quite recent prices for nuclear in Poland that has no history of nuclear power plant construction, or that Finland really do not need to add another nuclear plant, or much of anything else for that matter, as due to OL3 they became self sufficient for the first time or that their nuclear waste repository cost €3.5 Bn. You would barely get an offshore wind turbine for that price nowadays.



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  • Moderators, Motoring & Transport Moderators, Technology & Internet Moderators Posts: 22,716 Mod ✭✭✭✭bk


    Finland average electricity cost 24c per kWh, exactly the same price I'm currently paying Flogas

    https://countryeconomy.com/energy-and-environment/electricity-price-household/finland

    Finland cancelled the 4th and 5th reactors because OL3 was such a terrible experience!

    Post edited by bk on


  • Registered Users Posts: 1,156 ✭✭✭gjim


    If a 16% share for wind and solar in China is not impressive, then the 4.6% share for nuclear is significantly less impressive - despite a decent head-start. Isn't this thread supposed to be about nuclear?

    In 2023, China added 216GW of solar and 76GW of wind and 47GW of coal. Wind additions are growing 66% a year while the ABSOLUTE amount of solar is nearly doubling each year. This isn't a game that "coal" can win. So far this year 180 GW of utility-scale solar and 159 GW of wind power is already under construction in China. By the end of this year, they are on target to have over 1,300GW of wind and solar. The absolute amount of solar and wind in China is growing by over 30% a year - care to guess what the comparable rate of growth is for coal or nuclear?

    Same massive growth rates are seen globally, with renewables counting for 86% of ALL global electricity capacity additions in 2023. That is, over 510GW of solar and wind capacity was added in 2023. Nearly all of the rest was natural gas.

    You're just making stuff up claiming Ireland is putting all its eggs in a wind/hydrogen basket. We already have 1.2GW of solar, 1.5GW of batteries and the celtic interconnector is under construction. We are also replacing dirty and inefficient steam-based generation with gas turbines. In fact there are no eggs or baskets if you understood how electricity markets work.

    But you've avoided my main question Charlie. Do you believe that AGW is a hoax?



  • Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 91,570 Mod ✭✭✭✭Capt'n Midnight


    Five years after construction started on OLK-3 both of Finland's nuclear power companies had plans for TWO new nuclear reactors approved. That was back in 2010.

    There were plans for Hanhikivi 1, a Fennovoima / RUSATOM plant in Pyhajoki. "It wants to generate nuclear electricity "no later than 2020."

    TVO meanwhile is busy working on the Areva EPR under construction at Olkiluoto and did not give any dates for its next reactor. It wants to build again at Olkiluoto and it has specified that the project would represent only a single large light-water reactor of 1400-1700 MWe capacity at one of two locations at the site.

    The main reason Finland doesn't need a new nuclear reactor is they now have lots of wind.



  • Registered Users Posts: 1,156 ✭✭✭gjim


    Or maybe they're too busy trying to get Olkiluoto 3 actually working? It's been plagued with issues even after 14 years of delays during construction.

    Last November, it suddenly shutdown due to a malfunctioning temperature probe.

    First shutdown for annual maintenance was supposed to finish April 8 but the 5 weeks quickly turned into 10 because of "various issues" - https://montelnews.com/news/d092dae5-9475-45a5-9f00-d8e777154f80/tvo-blames-olkiluoto-3-outage-on-series-of-technical-issues

    I like how it's casually mentioned that the maintenance requires 1,100 external professionals (on top of the regular work-force) - I can only imagine the daily rates being paid. 1,100 external consultant engineers required for the maintenance of a 1.6GW reactor. Not cheap I am guessing.

    In June, a turbine problem brought it down. Reading the comments here https://yle.fi/a/74-20091975 - seems general admiration for Olkiluoto 3 expressed by some here is not universally shared by the Finns themselves.

    The EPR has been a disaster.



  • Registered Users Posts: 15,116 ✭✭✭✭charlie14


    Finland had the same volume of wind blowing before OLK-3 but still only became self sufficient when OLK-3 came on line.



  • Registered Users Posts: 15,116 ✭✭✭✭charlie14


    The plan favour by you and others here is for 37GW of offshore wind/hydrogen for a projected demand of 14GW, so how is that not practically all our egs in one basket, even though it will not provide the projected demand ?

    Rather than accusing people of making things up on generation perhaps you should look at the reality of generation. That 1.2GW of solar during Winter when our demand is high has a capacity factor of around 5 - 6%, 0.06GW. Batteries do not generate electricity and neither will the Celtic interconnector which is only capable of importing 700MW if the supply is there when we need it and will be from nuclear generation if it is. Generation by gas turbines is not going to get you to carbon neutral either.

    On China I have already provided you with the data from Ember, a green think tank, that show despite all the addition of wind and solar by China in 2023 it did not even keep pace with demand which rose by 6.9%. It only covered 46% of the increased demand with coal providing the other 54%. Wind and solar did nothing to lower China`s emissions in 2023. In fact their emissions grew by 5.9%. 6 times the global increase. In 2022 China added 19.5GW of coal burning plants and in 2023 began construction of a further additional 70GW of coal burning plants, (with a much higher capacity factor than wind or solar), on top of 1089GW they already have from coal (Source EIA), with their importation of coal in 2023 rising by 61.8% to an all time high.

    Nuclear in China may be coming from a low base, but unlike here they are not putting all their eggs in the one basket. 2020 China had 49 NPPs and announced it would add a further 150 by 2035 of which 23 are now under construction. of those completed the construction time has been between 5.5 - 7 years. According to a Reuters report citing Xinhua, the official state news agency of China the number of NPPs will futher increase to provide China with around 20% of its requirements by 2060.

    By AGW I assume you are again talking batteries, the latest great white hope. Again, batteries do not generate anything, they are storage and the fact that they are now being talked about here does show much faith in this 37GW plan doing what it was supposed to do as well as it being yet again another uncosted addition on top. Batteries have there place but to look upon them as a solution to wind generation dropping to 6% and less, as we have seen for extended periods when our demand was at it`s highest, is just more magical thinking imho.



  • Registered Users Posts: 5,036 ✭✭✭Shoog


    AGW - anthropogenic global warming. What's your position on AGW Charles ?



  • Moderators, Motoring & Transport Moderators, Technology & Internet Moderators Posts: 22,716 Mod ✭✭✭✭bk


    "The EPR has been a disaster."

    This, big time. It might be hard to believe but I'm actually "pro Nuclear". I remember 20 years ago being all excited about Europe finally building a new generation of Nuclear plants, these EPR reactors. Boy have they turned out to be a disaster!

    It is my interest in nuclear power, that lead me to reading up about the nuclear industry and why it seemed to be in such a bad shape, why so few new reactors are being build.

    The more you learn about it, the worse it gets. And I don't mean handling waste and the danger fearmongering and all that, I mean the engineering challenges and increasingly the very difficult economic challenges it faces.

    I think some folks have their head stuck in the sand on how difficult an engineering challenge Nuclear power is and the very real economic challenges it faces in scaling up.

    It isn't impossible of course, but it isn't easy or cheap.



  • Registered Users Posts: 893 ✭✭✭Busman Paddy Lasty


    Eh buying nuclear fuel from Russia is not self sufficiency.

    They've only begun looking for nuclear fuel deposits in northern Finland.



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  • Registered Users Posts: 15,116 ✭✭✭✭charlie14


    Finland has signed an agreement with the U.S. to provide nuclear fuel, so if Russia decides to not supply then they are covered.

    Uranium is not as rare as some may belief, and there was a map posted on these tgreads showing some high concentrations in Ireland. At least for Northern Ireland they can explore for uranium, here other than for whatever weird reason in Eamon Ryan`s head we can only look for gold or silver.



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