Tõsi, aga BWRX-300 projekti kohale on pilvi kogunemas küll, eriti peale seda TVA hinnarvutust
mida ka siin teemas jagasin (ja nad on vägagi kompetentsed ning plaanivad selle ka reaalselt ehitada):
Gideonic kirjutas: ↑30 Sept, 2024 13:25
TVA (
Tennessee Valley Authority) 2025 a. ressursiplaneerimises prognoositakse, et sinna rajatava USAs esimese BWRX-300 moodul-reaktoritega tuumajaama esimene reaktor valmib 2033 aastaks ning hind tuleb
$17 949 kW kohta See on
üle 5 miljardi dollari 300MW reaktori eest (viide)
Nende suurimat probleemi puudutas ka Decouple podcasti
see osa. (viidatud ajahetkele, relevantseim osa on sealt edasi 5-9 minutit). Saatekülaline
Koroush Shirvan on MIT professor kelle erialaks on tuumajaamade tasuvus, ehk "päris debiilik" vast ei ole.
Seda on peegeldanud
küllalt hästi ka teised:
For a long time, I’ve brought into the line that the BWRX-300 is just the tenth evolution of the tried-and-true Boiling Water Reactor (BWR). “The closest thing to a sure thing,” was how I described it, in comparison to the current crop of SMRs.
After hearing the latest episode of @DecoupleMedia
featuring MIT’s Koroush Shirvan, all of a sudden I’m not so sure. You see, the BWRX-300 is different from every single other BWR currently in service in a pretty consequential way: it has done away with pumps, relying instead on natural circulation. At first, that sounds nice. You don’t need as many wires and piping and pumps.
So what’s the problem?
The nice thing about pumps is that you can move things around faster. If you are relying on passive rather than forced circulation, you cannot remove heat as efficiently. This “reduces the energy density that you can have in your core.” Translation: now you are going to have a much larger reactor pressure vessel. Add on the safety systems required by the regulators, all of a sudden you have an “SMR” that is not just tall, but also obese: the shaft diameter for the civil works excavation to contain the reactor is now 36 meters in diameter, “wide enough to the exact same size as an ABWR reactor.” Except the ABWR produces 1,350MW to the BWRX-300’s 300MW. And it doesn’t need to be buried in the ground.
The reason it has to be buried is because the thing is so damned tall…you want the spent fuel pool to be in line with the water level i the reactor and with a tall reactor pressure vessel you can’t have it hanging out in the sky. Even wind and aircraft impact is a factor. And so you have to dig. And suddenly each different site presents a different challenge, another bane to standardization.
Help make it make sense for me? It’s not small, it’s not modular and it seems if you’re going through all that trouble why not build an ABWR? Even if your grid is rightsized for 300MW just stick some data centers or hydrogen electrolyzers next door to sop up the extra. Why go through big trouble to build small???
Sellise info esiletuleku järel ei arva ka mina sellest projektist üldse enam nii hästi.
"passive safety" ja pumpade eemaldus on tegelikult 90ndatel Lääne tuumafoobia-paralüüsis tekkinud
turundus-mehhanism, mida mitte ükski teine kainemõistuslk veepõhise reaktori arendaja (ei ennem ega pärast) ei ole tahtnud jälgida (kuulake podcasti lõiku ennem vaidlemist!).
Põhjusega, sest sel on otsene üüratu mõju suurusele ja seega hinnale. BMWX-300 üleskaevatav ja betoneeritav ala on paisunud oma esialgsest plaanidest (kus oli lootus et mitmeid ohutusseadmeid ei pea pasiivse sirkulatsiooniga nii palju lisama) ikka üüratult.
Allpool pildil on BWRX-300 2019. a. plaan vs 2024 aasta seis:
Sellele maaalusele osale on vaja veel väga kallist ja mahukat "
alusmatti" ja see peab olema kõige kõrgema tasemega maavärinakindlast kürgeima kvaliteediga betoonist (
siin artikkel miks see nii kulukas on)
See on ilmselt põhiline, aga mitte ainus probleem, mitmeid teisi kokkuhoiukohti ei kasutata ka. Näiteks Kontrollruumide ja seadmete dubleerimise vältimine mitme reaktoriga jaamades. Asi mis on väljaspool tuumaenergiat standardpraktika ja millele Nuscale sai esmakordselt loa oma jaamades (kuigi nagu teame, neil oli teisi probleeme).
"Kabelimatsu" tasemel hinnangu BWRDX-300'le annab aga minumeelest äsja teatatud Rootsi SMR rajaja Kärnfull'i partnerlus hoopis Lõuna Koreaga (
just moodulreaktorite osas):
https://x.com/sollidnuclear/status/1866179699388367145
Last week, Swedish SMR project developer, Kärnfull Next (
@karnfull_en), signed a partnership with South Korean giant Samsung C&T.
The collaboration aims to accelerate the deployment of SMRs within Sweden and the rest of the Nordics.
Kärnfull and Samsung will develop a comprehensive roadmap for the selection of reactor type, environmental approvals and ultimately the construction of new nuclear power plants in Sweden.
Vastav
pressiteade.
Kärnfull on minuteada Fermi Energia üks investoritest. Kalev Kallemets on neist oma sotsiaalmeedia kontodel rääkinud ja näib olevat suht tihedas suhtluses. Vanasti vaatasid ka nemad
kindlasti pigem BWRX-300 poole. Miks nüüd enam mitte?
