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Nuclear - future for Ireland?

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  • Registered Users Posts: 894 ✭✭✭Busman Paddy Lasty


    It's a valid point rather than a fixation. Not being able to defend nuclear infrastructure is a national security risk, even if that defence is never needed. I never said there have been attacks on nuclear power plants. Probably because they're located in countries that have competent militaries.

    Let's plan a 2 reactor 2.8 GW NPP at the planned Bremore Port or Greenore Port and wait to see how the UK risk assesses that one!

    As for size/capacity you make a great point. If demand doubles by 2050 then a NPP would fit the bill.

    Considering the planning hassles common in this country, the amount of consultations for Bus Connects and Metrolink do you really think one could ever be built? Seriously.

    Never mind technology or costs, there's a people dimension in the mix as well.



  • Registered Users Posts: 20,053 ✭✭✭✭cnocbui


    What I seriously believe is that irrespective of the technologies you think are needed to achieve the current aims, they are completely unachievable with the current POS planning system in this country. So yes, I completeley agree with you that nuclear is unachievable in this country with the current planning system, which has to be thrown out anyway at some point, even if you wan't to spend way more money on stupid amounts of onshore and offshore wind farms and the hydrogen infrastructure to produce and store a couple of hiroshima bombs worth of hydrogen.



  • Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 91,585 Mod ✭✭✭✭Capt'n Midnight


    Right now it's the middle of winter and 50% of the UK's reactors are offline Nuclear is absolutely reliant on backup.

    Only ONE of those outages was planned.

    Unplanned outages at Hartlepool nuclear power plant’s two 620-MW reactors are set to last until Feb. 4 and Feb. 6,


    A reminder again that a nuclear power plant generates CO2 until it's construction and fuelling have been offset. There is no way to build a nuclear power plant unless you plan on using fossil fuels to keep the lights on until the nuclear plant is completed and commissioned.

    Or you could invest in renewables and start seeing emission reductions an awful lot sooner.



  • Registered Users Posts: 20,053 ✭✭✭✭cnocbui


    Once again, you are talking about mostly 30 year old infrastructure. Wind farms and solar need massive amounts of backup because they are fundamentally flawed as a provider of base load and are completely unreliable. Just a few years ago we had a string of unplanned shutdowns of major gas turbines here and were in dire straits for a while.

    On 2 December 2020 Whitegate power station experienced a forced shutdown. Bord Gáis Energy said that the power station was expected to be offline until 31 December 2021

    Had that been a nuclear plant you would be banging on about unreliability and how gas fired power plants were inherently unreliable and so we shouldn't have any.

    A nuclear power plant does not 'generate' CO2 any more than a wind turbine does, each of which requires close to 1,000 cubic metres of concrete for it's foundations for a 200m land based turbine. What's more, with double the lifespan of a wind farm, it's likely the CO2 associated with the concrete in a NPP gets amortized to a greater extent.



  • Registered Users Posts: 8,463 ✭✭✭Markcheese


    30 years isnt considered a long time in the scheme of nuclear power -if its budgeted to be in useful service for 40 years plus, so if there are many unexpected shutdowns in a nuclear system, you need more reactors in reserve

    But , Every system has problems and shut-downs , 2 of the newer gas turbines here were down a few years ago , for almost a year ,

    Slava ukraini 🇺🇦



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  • Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 91,585 Mod ✭✭✭✭Capt'n Midnight


    Have we ever lost 50% of our fossil fuel powered power stations at the same time ?

    Have we ever lost 50% of our annual renewables ?

    Have we ever lost 80% of renewables for longer than a decade ?




    If nuclear can't last 30 years how is it supposed to last 60 years ? You can't have it both ways. BTW there are no 60 year old nuclear power plants.

    Appealing to technology that doesn't exist yet / "we'll get it right this time" is hubris. General Grove asked for the original reactor to be run for a longer time but they knew better. Result was delayed plutonium production for the Manhattan Project by months. Rinse and repeat for the last 80 years.



  • Registered Users Posts: 8,826 ✭✭✭SeanW


    Your claims on nuclear and CO2 are bunk. The figures for primary and secondary CO2 emissions (the latter being life-cycle emissions) and most sources put the secondary CO2 from nuclear energy at 5-12g kwh.



  • Registered Users Posts: 20,053 ✭✭✭✭cnocbui



    We lost 2 fossil fuel power stations simultaneously.

    TWO MAJOR GAS-FIRED electricity power stations — one in Dublin and one in Cork — unexpectedly disconnected from the national grid within five seconds of each other late on Monday evening, resulting in the loss of 820 megawatts of power.

    This was the equivalent of 20% of the total national demand for electricity at that time.

    I do not have the slightest concern about continuing to rely solely on gas fired power stations in prefernce to nuclear. What Ireland does to reduce CO2 generation is utterly meaningless in the scheme of things, at a paltry 0.3% of the global total. The only reason I favour nuclear is if you really want to achieve net zero, which is unachievable using wind and solar, and a lot more expensive while you make the doomed attempt.

    You are blind to the basic logic that a wind turbine is inherently unreliable and solar is so far worse it's a joke. Nuclear is the worlds most reliable energy generation technology, yet you spend inordinate amounts of effort cherry picking instances of 30 year old reactors shut temporarily for maintainance, to dishonestly try and spin an endless stream of BS that it's not.

    We have over 4GW of installed wind generation capacity and for the past week it's been generationg next to nothing. At midnight, that unreliable infrastructure was generating only 334 MW, it's picked up a bit since. Korean nuclear capacity factor exceeds 94%, but you think Irish 24% capacity factor wind is more reliable?

    End of conversation. We do not have the same concept of what reliability is. A 30 year old UK NPP can set a world record of generating power for 2.4 years straight, but if it then is shut down for maintainance, it suddenly becomes unreliable in your eyes. I'd recommend spec savers, but they can't fix what ails you. To me, a wind turbine that takes a week off generating anything in the cold dark depths of winter when energy is most needed, is unreliable, to you it's more reliable.

    60 years is the current design life for nuclear power plants built today with technology that is more advanced than it was over 50 years ago, it wasn't for the ones built in the 70's and 80's:

    The world’s fleet of nuclear power plants(NPPs)is, on average, more than 20 years old. Even though the design life of anNPPis typically 30–40 years, it is quite feasible that many plants will be able to operate in excess of their design lives

    Arguing that we shouldn't buy a new car designed to last 60 years because there are 30 year old cars only designed to last that long originally, that true to their nature, now require some maintainance, is pretty stupid.

    You want inherent unreliability and maintainace issues, well you need look no further that offshore wind farms. Apart from their starting point of 56% unreliabilty, they are barely expected to last 30 years and that is only with prodigious amounts of maintainance. If it costs €6 Billion to build an OSWF, you will spend another €2 billion on maintainace - 25-30% of initial capital investment worth of Operation and Maintainance costs.



  • Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 91,585 Mod ✭✭✭✭Capt'n Midnight


    Please point out when we lost 50% of our fossil fuel plants at once. Germany, France, the UK and Japan have all lost 50% of nuclear power despite having different designs.


    Renewables are variable. Not exactly news. That's why we use backup now with a migration to storage later. Actually we need high inertia generators near the large cities for grid stability, nuclear can't do this. When we get more synchronous converters etc we can use then for the inertia.

    Thanks to better computers and satellites renewables can be forecast so that backup can be ready.

    Nuclear tends to be all or nothing. So can't help out when more power is needed and is absolutely dependent on spinning reserve. And for multiple countries choosing nuclear meant having to keep fossil fuel going for another decade.



  • Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 91,585 Mod ✭✭✭✭Capt'n Midnight


    Tell us how much CO2 was saved by Flamanville 3 since 2007 ? or Olkiluoto‑3 since 2009 ? or Vogtle-3 and 4 since 2013 ? or Summer-2 and 3 since 2008 ?

    Nuclear power projects have relatively high abandonment and delay rates so you have to include the failures as part of the overhead.



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  • Registered Users Posts: 8,826 ✭✭✭SeanW


    Olkiluoto‑3 has helped to bring down Finlands' CO2 emissions nicely. And if you think the figures for secondary CO2 emissions from nuclear are wrong, feel free to contact the UNECE and the IPCC to let them know they're full of crap. Let us know how you get on.

    And as for your "standard" I don't think that's a road you want to go down considering that by your same standard, renewables are liable for the CO2 that is emitted by their backup sources. A comparison between the CO2 per kwh figures for countries like Ireland and Germany and those of countries like France tell a story that contradicts your narrative. And "storage" is bunk, there's nothing practical along these lines. Perhaps you're putting your hopes in some killer technology that is yet to be invented, but we know from the French experience that this isn't even necessary as we have what we need to decarbonise a power grid - and have had it for decades at this point.



  • Registered Users Posts: 20,053 ✭✭✭✭cnocbui


    France's current CO2 output is 53g per KWh. We are 332g per KWh, but something about some concrete poured 30 years ago, ignoring of course all the concrete poured in just the last couple of years for turbine footings.

    Oh look, a 6 GWh gap between wind output and current demand. I know, lets build interconnectors and buy all that zero CO2 electricity neither the UK, France or any other country in Europe has to spare. Let's see, in 2050 demand will be something like 14 GW, we will maybe manage 2 GW from wind by then in conditions like these, so what does 12 GW of interconnectors cost, hmmm... €2 Billion per 700 MW, that's only €34 billion on infrastructure that generates not a single watt.

    Of course maybe we don't need 12 GW of incredibly expensive Interconnector capacity, maybe we will have 12 GW of generation capacity from our vast stores of hydrogen, all built out and developed in just 26 years, I mean just look what we can achieve when we really think something is important, like a national childrens hospital, which has only taken 27 years to build since the need was identified. What, it's not finished yet?

    I'm sure we'll have clean burning hydrogen fueled turbines by then, even though none exist outside of one small test rig that hasn't been independently scrutinised. I wonder what is the Carnot efficiency of a gas turbine you have to spray ultra pure water into continuously to suppress NOX creation?

    Appealing to technology that doesn't exist yet / "we'll get it right this time" is hubris.

    The 30 GW of offshore wind is coming along nicely. i wonder who's going to build them now that Equinor and Shell quit and ran away after realising what the planning system was like.

    We had an auction for the first 3 GW of offshore wind 7 months ago. No planning applications submitted yet or announcements of funding being secured.

    Ha, ha, ha:

    Commissioned in 2017. I hope EDF are laughing their heads off.

    France seems to have sensed which way the wind doesn't blow in winter:

    Critics who don't understand what capacity factor is or that the world does not have a demonstrated or affordable energy storage technology that can make up for woeful capacity factors.



  • Registered Users Posts: 5,039 ✭✭✭Shoog


    That good old reliable nuclear, UK has 50% of it's fleet offline, most unscheduled

    wind currently supply more than twice the nuclear fleet.😭



  • Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 91,585 Mod ✭✭✭✭Capt'n Midnight


    OL-3 started construction in 2005. So there's 18 years of carbon emissions building it, and 13 years of paying for other generators and fuels to do it's job.

    OL-3 already produced 10.37 TWh of electricity to the national grid last year. That is almost half of the whole production volume at the Olkiluoto site. The unit has been in production for 6155 hours, with only two minor production disruptions, only accounting for 1.4% of the total operating time.

    If you include the 13 years of construction delays, and you have to because you had to keep the lights on, then it's uptime is only just over 5%. It can't possibly hit 50% capacity factor until at least 2037.

    Moral don't bet on Nuclear unless you have a backup plan and backup and spinning reserve and deep pockets, lots of storage wouldn't hurt either. And if you have all that then renewables start paying for themselves a lot sooner.




    Wind in Finland produced 14.467 TWh last year. Over half of that from wind turbines constructed since 2021.




  • Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 91,585 Mod ✭✭✭✭Capt'n Midnight




    Yesterday between 10:00 and 15:30 UK solar produced more than UK nuclear.

    Solar displaces peaking plant when wholesale prices peak. https://gridwatch.co.uk/



    If you do it by percent it looks like this. Since Nuclear can't ramp up it's % shrinks. https://gridwatch.co.uk/demand/percent



  • Registered Users Posts: 8,826 ✭✭✭SeanW


    Like I said, you had best let the IPCC and UNECE know that their data for nuclear power is full of crap, and let us know how they respond.

    And by your own standard, Irish windmills emit 500g/kwh when the wind doesn't blow - because that's what Irelands emissions tend to be when wind farms aren't producing. This despite the fact that anti-nuclear environmentalists have determined Ireland's energy policies since 1978.

    As for the Finns specifically, their EPR came online in 2023, the year after Russia began its invasion of Ukraine. So it will help to replace Russian energy, which Finland had distanced itself from as a result of that.



  • Registered Users Posts: 8,463 ✭✭✭Markcheese


    In a way not having or really needing a nuclear industry is actually an advantage for Ireland,

    Ireland could pick any tried and tested nuclear design being offered and go for that ,

    In the early days of nuclear power the french tried several new designs , before just going with a westinghouse design and building loads of those ,

    As a customer we could do the same - pick an established contractor offering a tried and tested design , which reduces risk and cost ,

    Doesnt mean its cheap , and it still needs back up , every power system does + ancillary infrastructure , like an upgraded grid ,like interconnectors, like energy storage to help with peaks and troughs of demand and supply

    Slava ukraini 🇺🇦



  • Registered Users Posts: 5,039 ✭✭✭Shoog


    There are no tried and tested designs, they all hit the same issues of delays and price over runs.

    Anyway we don't have a nuclear warhead arsanel to justify investing in nuclear (unlike our good friends the Brits).

    We also don't have a credible armed service to defend against an attack on a reactor which would render Ireland uninhabitable - and there is no indication we ever will have.



  • Registered Users Posts: 8,463 ✭✭✭Markcheese


    Well if we were investing 25 plus billion in a single power station ,we could probably invest in the security too,

    do many European power stations have military bases at power stations ?( serious,maybe they all do ) Plus who exactly is ireland defending against , we are a small island off the west of europe, without any major minerals ect,

    Slava ukraini 🇺🇦



  • Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 91,585 Mod ✭✭✭✭Capt'n Midnight


    It provides less power than wind in Finland. And most of that wind was installed after the plant was already 10 years late. The successor plant was cancelled because it depended on the Russians. Finland is a generation and a power plant behind their own nuclear timeline.


    Our grid rules say we'd have to provide 1.2GW of replacement power within 5 seconds if that kind of reactor went off line. It's already had two outages since April. Where would we get that power ? Technically speaking nuclear isn't a fit for our grid.

    Finland has good connections to the neighbours. But Sweden, who have oodles of dispatchable hydro, had multiple nuclear outages last year which caused Finland's wholesale price to double.



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  • Registered Users Posts: 5,039 ✭✭✭Shoog


    As a terrorist you go for the soft targets, an undefended nuclear reactor is about the softest target imaginable. In terms of impact - huge since Ireland is home to a lot of IT infrastructure that Europe and America depends on.



  • Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 91,585 Mod ✭✭✭✭Capt'n Midnight


    Tried and tested ??

    France and the USA have had massive problems with corrosion over the years. The UK's old designs are a no-no, and not just because they use something like 10% of the electricity for pumping. Even with multiple designs and multiple operators with varying philosophies to cutting corners, Japan's lost 80% of it's nuclear power. Korea got blindsided by fake parts. Russia and China are out if you want local control.

    After Fukushima France had to spend tonnes of money upgrading the backup power on it's plants finally accepting that the other reactor on site wasn't enough, and they'd already had a flood at Blayais back in '99 so they should have known already. The UK had to build sea walls because a repeat of the 1607 flood would have taken out multiple sites. Retro fits are lot more expensive than doing it right first time. It's one of the hidden costs of nuclear.

    Climate change is also an issue regardless of design. Cooling water may ice up, or dry out, or be too warm. Here we are already planning on pumping water from the Shannon to Dublin. Jellyfish are a problem world wide.


    Nuclear is a massive gamble. High stakes for low reward. It's not clearly cheaper than today's costs for renewables plus storage. But a nuclear plant won't be build this year. Or next year. In Ireland the legal challenges will go on for years. And the price of renewables will keep falling due to economies of scale and lessons learnt.

    Put simply if nuclear isn't cheaper than renewables plus storage for the first 30 years of operation there is no economic case for it.


    And even then it doesn't matter if you get the design and backup right and have good operation records. Italy and Germany abandoned nuclear power for political reasons.



  • Registered Users Posts: 8,463 ✭✭✭Markcheese


    I doubt you'd have any less security on an irish nuclear reactor than any other countries ,

    One of the reasons the costs of a nuclear power station are high are the security and the fail safes , and operating a nuclear power station isnt cheap

    I'm not saying it couldnt be attacked , but many other countries have nuclear power stations , and have terrorism ,

    Slava ukraini 🇺🇦



  • Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 91,585 Mod ✭✭✭✭Capt'n Midnight


    You'd have to guard the transmission lines too.

    We didn't have a north-south electrical connection for a long time because of terrorists.

    Ireland has an EU veto. We are the top EU country for data fines. So plenty of reasons for countries and corporations to blackmail or bribe us.



    Nuclear power is a 60 year project so you can't assume the political climate will remain unchanged.

    What's Sinn Fein's policy on nuclear power ? Remembering that most of the expertise , equipment and fuel will be imported. And likely a lot of the labour.



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


    Nuclear power stations come with huge cost risk. I don't know any new nuclear plant that has gone to schedule, but there's quite a few that have gone wildly over budget and time. The initial price estimate might be financially viable, but the actual final cost really kills the value proposition of nuclear. And the reason is simple: the scale of a nuclear power plant puts them at the limit of current construction technology, and they are subject to the kind of safety conditions that no other structure needs to meet. That makes each and every one a megaproject, with all the risk that entails. You might think that the 2x overrun to build a state-of-the-art hospital is scandalous, but that kind of overspend is actually a good outcome for nuclear plant construction.

    If the scale is the issue, you might be wondering why we'd have to build such an enormous plant. Well, the basic physics (or thermodynamics, to be more accurate) of a Uranium reactor mean that it isn't economically viable to build a small reactor. When it comes down to it, nuclear plants are heat engines: use heat from decay to turn water into steam, use the steam to turn a turbine. But the relatively low temperatures from U/Pu decay mean that you have to build really big to get enough power to be worthwhile. (Gas fired stations get high power from smaller space because they produce about 3x more heat than a nuclear reactor does).

    Now, Thorium reactors do burn hotter than current technologies, which would allow smaller scale and cheaper construction, but there is no such thing as a Thorium power plant design, let alone anyone building them, and it's 50/50 whether we'd have working nuclear fusion before Thorium.

    For nations that already have nuckear plants, the incremental addition of one more might make sense (you can share the infrastructure for fuel management, for a start), but starting from zero, the costs completely dwarf the benefits.



  • Registered Users Posts: 8,463 ✭✭✭Markcheese


    I'm not doubting the staggering costs associated with building, running and maintaining a nuclear power station , and then decommisioning..

    The fuel is relatively cheap , the operating and interest arent ,

    The french did pretty well with their copy of the US design , well they did till the 80s, the koreans seem to be able to knock out the same westinghouse design pretty reliably ( i dont know much about the fake parts scandals, or how much it cost , who paid )

    The US did pretty well ,with their standard westinghouse design in 70s abd 80s -didnt go so well when they tried to restart production in the late 90s .

    Slava ukraini 🇺🇦



  • Registered Users Posts: 5,039 ✭✭✭Shoog


    I very much doubt that even if all the other hurdles where jumped that Ireland would be allowed to go nuclear given their lack of a viable security infrastructure. Nuclear preliferation is a huge issue and only countries who show the ability to prevent "leakage" of fissable materials are candidates for development.



  • Registered Users Posts: 20,053 ✭✭✭✭cnocbui


    There is a tried and tested design, it's what the UAE built and Poland are about to, the Korean APR-1400 reactors.

    The contrast between Polish politicians and the Irish greens and anti nuke lot couldn't be greater. Many of them are in a panic because after having done the environmental and other assessments for the site of the proposed NPP, the new PM, Tusk, is making stupid noises about throwing all that out and starting the whole process from scratch at a different location. Delays and cost escalations with nuclear are often due to such political stupidities and meddling.

    I can only appeal to Prime Minister Donald Tusk - Prime Minister, this is an extremely necessary investment for Poland, the preparation of which has so far taken years (...). This power plant is extremely necessary for Poland in order to ensure the stability of energy supplies, energy sovereignty, and the ability to fully implement the obligations resulting from the European climate protection policy. We want Poland to fulfil these commitments, so that we can also be in the vanguard of caring for the natural environment, sustainable development and climate. In order for this to be possible, this investment must be completed as soon as possible, within the previously planned timeframe, said the President.




  • Registered Users Posts: 20,053 ✭✭✭✭cnocbui


    It's a sovereign EU state, who the duck do you think get's to say no, the US with every third politician having an Irish surname?

    The security angle is nonsense, no country has ever needed more than a domestic police force to face down a few protesters waving signs, and that is rare enough.

    The issue is proliferation of nuclear weapons, not NPPs. Even the nuclear weapon non-proliferation is a load of hot air nonsense and hand waving. No one stopped India, Pakistan, Israel or North Korea.



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  • Registered Users Posts: 20,053 ✭✭✭✭cnocbui


    You don't want to know of any NPP builds that went to schedule or were a reasonable length over. The overall average is 7.5 years. Some have been built in little more than 3 years.

    You would think from the negativity on this thread that no one in the world would ever build a NPP, but 60 are under construction and 110 are planned. France jus seemingly threw renewables under a bus in favour of concentrating on building more NPPs.

    If they had been less politically greedy, they probably wouldn't have needed to. Since the 70's, they earned so much from exporting electricity that it could have funded a new reactor build every 2.5 years.



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