written 1 December, 2024
published 8 December, 2024
Globally, one in eight people can't afford electricity, even where it is available, yet in the last decade, three computer developments have dramatically increased US electrical consumption: server farms, cryptocurrency, and artificial intelligence (AI). These consume as much new power as all the renewable production added in the same period of time.
Server farms support the explosion in online capacity, which enables walking down the street watching a high-definition movie, or lost in social media.
Crypto burns power "mining" new currency, a resource wasteful form of money. Loss of power can deny access to the wealth, or lose it forever. Crypto is inflationary, adding new currency to the society without any additional new value. Prices swing wildly, more speculation or gambling than a foundation for a stable society. However, it is the preferred currency for those wanting to avoid centralized control, and thus supports the black market in blackmail, drugs, and weapons.
AI (more properly called "advanced machine learning") is the hottest "next new thing", with potential valuation in the trillions. Despite many promising possible positive values, it also quickly brings to mind the Terminator series of movies. The Pentagon is working on killer robots as the next logical step beyond drone warfare. AI is already destroying jobs, and amplifies cheating and disinformation. The AI "learning" process plagiarizes existing copywritten work. Thousands of low paid workers in third world countries manually identifying objects and materials as more grist for the process.
Because the energy required for all this is adding to an already stressed electrical grid, the magical solution is nuclear power! Nuclear plants scheduled for retirement are now being pushed to extend operation specifically for servers and AI. Reactors already in the decommissioning process are being considered for revival. At this point, these plans are only proposals. Reality may prevail. No large nuclear plants have ever been restarted, let alone shifted from decommissioning to renewed operation. The pool of trained nuclear workers is aging and retiring. Just extending plant operation, without massive and expensive refitting, risks increased failure from embrittlement.
However, the nuclear industry is very big money, and hope springs eternal. Originally advertised as "too cheap to meter", nuclear power today is twice as expensive as grid scale solar with storage. Existing commercial reactors are massive, over 1,000 megawatts (MW) capacity, and are built singularly, thus very expensive and time consuming to construct.
The latest nuclear salvation is going to be small modular reactors (SMR), with reduced capacity (1-50MW), and the promise mass production will make them more affordable. New designs will be less likely to explode like Fukushima, because they will be cooled with sodium, operating at higher temperatures and won't boil away when power is lost. Rather than long fuel rods, small spheres of nuclear material will be used, that can be added over time without shutting down the plant. Alternately, the entire reactor can be replaced, and a new one installed, like a battery.
However, there are still issues to resolve. No SMR is currently available in the market place, and it may be a decade before that happens, with an unknown price tag. SMR production will only be profitable if there is sufficient demand, which is not the case right now. These will still produce high level nuclear waste, needed sequestering from living systems for millions of years. After 70 years of commercial nuclear power, the US has not created any adequate storage. Smaller reactors have a larger ratio of surface area to fuel volume, therefore the entire reactor structure will become radioactive sooner than in larger systems. This will make "replacing" an SMR problematic.
Finally, there is the fuel source itself: uranium. Uranium is finite, and global production peaked in 2016. The US is not in the top ten producing countries, and most of them are not our allies. While all uranium isotopes are radioactive, one specific isotope, U-235, is required for profitable commercial operation. Raw ore contains less than 1 percent of U-235, which must be concentrated (enriched), using massive amounts of electricity, to 5-10 percent for a reactor. The US imports enriched uranium from Russia, which just cut us off due to our support for Ukraine. The only domestic commercial enrichment facility is not expected to be operational for another decade.
Our bus is speeding downhill on a twisty mountain road in heavy fog with fading brakes, and a driver stoned on visions of profit.