The Manhattan Project was two parallel bomb programs rolled into one, was a 'fast track' construction project which has risk of extra expense, & had some expensive items on the books which were not really purchased. i.e: several millions Troy ounces of silver bullion possessed by the US Treasury was handed over to use for electrical wire vs copper. This was booked as a cash cost tho the bullion was still possessed by the US government & eventually went back to the Treasury when the equipment was broken up for salvage. A program for developing a Plutonium bomb only, & run on a non emergency basis with average planning may have cost 20% to 30% of what the US emergency multitrack program cost.
Largely agreed.
I suspect, but can't prove, it is less than 10%. Just go to general project management. A rushed, panic start to any project can jump the costs by multiple, not percentages. So if one starts a 50 story building in small town America, use only workers who have never built a building above one story tall, start building without blue prints, build two buildings because one or the other design does not work, you could easily spend enough to build ten 50 story building if done with experience workers on a reasonable time frame. And we should also note that they were designing a program not to have a few bombs produced per year (likely ITTL), but trying to build a massive program to spam the bomb. I would guess the real cost of a program ITTL is about 5% of OTL costs. So the two billion USD spent is much more like 100 million USD (1 Iowa Class Battleship). Now spread that out over 10 years, and we get an average cost of 10 million per year for a few bombs. (Probably about a DD per year).
And the risk is much lower than OTL. The research cost will be well under 1 million USD per year when at the university stage, and this number will be buried in many budgets. By the time to proceed with the program decision is made, there will be enough plutonium lying around for a handful of bombs, the science is understood, and we are mostly dealing with engineer issues associated with production and delivery of the bomb.
And I left something out since it has been so long since we had a series of threads. Radium. There actually was a radium bubble right about the time WW1 started. We had discovered chemotherapy and were using radium. There are projections in the NY Times that radium mines will be more valuable than all the gold mines of the world. And these mines had mining trailings consider a waste product. We call these waste product uranium ore. Yes, they were mining uranium deposits for radium. So it is such a smooth process to commercial reactors.
- Year X. Element 94 picked up by atomic spectrometer.
- Year X to X +2. Followup research confirms.
- Year X+2, someone tries to get rich buy building a small uranium pile. You are doing the modern dream of alchemist, making something more valuable than gold. Of course their may be accidents. You will have to cool the pile. It may be messy extracting the shorter lived radioactive elements. The reactor is likely small, since you can get rich with very small amounts of "super gold" production. Seems like this stuff was worth at least 100 times the value of gold per ounce, but be careful with that number since it is memory.
- Year X+3, Copy cats enter area to get rich.
- Year X+4, I have most of the stuff needed for commercial reactor. The missing parts are mostly the engineering required to hook it up to the turbines.
Now we can talk a bit about the timing. Maybe it takes twice as long. But it is easy to see a world where someone will take the next step. And a lot of it will be luck. Who tries to build these 'get rich quick' reactors. There will be someone like Zeppelin who will fund it. Who? Where? Good question.
I hope this highlights a bit more why the program is so cheap ITTL. When the go decision is made by some government, all the tech will exist to extract the pure plutonium. The physics will be well understood, probably highlight by a few nice size accidents. It will be just he weaponization that will need to be done, and this will be of modest cost compared to a Great Powers budget.
The main reason I write so much on this topic is that it would be a great timeline to read. Just a lot of work to do well. Anyone can get the bomb. You can have something like in here where WW1 is avoid. Or with a well constructed POD, you can have OTL WW2. The key is not getting the initial discover of element 94 which can be done in any year after about 1920. It is getting the follow up experiments to confirm. Scientist today still argue if the experiment actually detected element 94, but it was of the type that could. And followup research would have figure out why the extra heat was being produced. The key is the confirmation experiments of Element 94 QUICKLY followed by someone trying to produce small amounts at universities. What I call a research reactor.
So often, the predecessor tech is there, just no one puts it all together. Radar was tested in harbors in Germany prewar, then forgotten. Twenty years lost. The same with guided glide weapons. At least a couple decades lost. Then someone intentionally or unintentionally funds the project.