Another poster already mentioned that transuranics and other such byproducts tend to be very dense, so a swimming pool can in fact hold tens of thousands of tons of spent fuel. Also, ‘nuclear waste’ is a generic catch-all term that includes less radioactive material, compared to ‘spent fuel’ which is just the really ‘high-grade’ material.

The part about not needing enrichment is worth discussing, but we do have solutions to that already. There are entire classes of reactors dedicated to not producing weapons byproducts or needing enrichment using the same processes capable of generating weapons-grade material. The reason we see reactors that can make these materials so often is because many of the early reactor designs (many still in use today) were explicitly selected for use by the US government during the early days for their dual-use ability to make plutonium for nuclear weapons. Examples of proliferation-safe designs include molten salts and integral fast reactors, but there’s an engineering experience chicken-and-egg problem - they don’t get built very often because we don’t have experience building them. A new design like this will face the same challenges.

TL;DR: Combining a particle accelerator and a nuclear reactor to turn Uranium-238 into Plutonium-239, which then fissions. The reactor itself is subcritical, so if the proton accelerator turns off then the reaction stops.

The main advantages of the system claim to be ‘increased efficiency of fuel use’ since the uranium doesn’t need to be enriched, the ability to burn long-lived nuclear waste, as well as the system being passively safe.

The first point strikes me as an odd thing to focus on, since all nuclear reactors are already very fuel efficient, and if you want maximum efficiency then breeder reactors exist already, which produce more fissile material than they consume - you can’t get much more efficient than that. Fast breeder reactors are also great for burning up nuclear waste too, but they never really took off because, well, there isn’t actually much nuclear waste to use, precisely because typical reactors are already very efficient: A reactor might consume one ton of fuel per year. You could fit all the spent nuclear fuel humanity has ever used into a single swimming pool. I mustn’t be too critical though - any attempt to close the fuel cycle is good, I just don’t think it’s a really pressing issue. Lastly, being passively safe is cool and all, but almost all new reactor designs are, and attaching a particle accelerator to a nuclear reactor sounds like an expensive way of doing it.

All of that being said, I’m always interested to hear about new reactor designs, so I guess we’ll see how it goes.

New Zealand.

Our laws make carrying anything with the intent to use it as a weapon (in self defence or not) a crime - whether it’s a gun, sword, pepper spray, cricket bat, screwdriver, or lollipop stick. This makes sure that when someone robs a corner store the owner gets jailed for having a baseball bat behind the counter. It’s absurd.

The law not only doesn’t equalise your chances, it actively forces you to be at a disadvantage when defending yourself, and by the time any police arrive the assailant is long gone. Most criminals don’t have guns (except for the multiple armed gangs of course), but plenty of them bring bladed weapons, there have been multiple cases of machete attacks.

I’m all for gun ownership for the purpose of property defence. Including strong legal defences for home and store owners repelling assailants.

I don’t think just anyone should be able to go and purchase a gun no questions asked, it should probably be tied to some kind of mandatory formal training, e.g. participation in army reserves. It should definitely be more difficult than getting a driver’s licence (but I also think a driver’s licence should be harder to get than it is now. The idea that you can go and sit a written test and then legally pilot a two ton steel box in areas constantly surrounded by very squishy people is kind of absurd to me).

Not many people know the history of the treaty. It basically was signed under duress. Prior to the meeting where it was signed all but one of the Maori tribal leaders were against signing the treaty, even the Maori version. What was said at the signing was purposely never recorded, but considering the existential threat of the New Zealand Company (NZC) on the horizon (the primary reason a treaty was even being discussed), it is believed that the Maori leaders were basically given the choice of ‘sign this treaty and be a part of the British empire, or don’t and have no legal rights against the whims of the New Zealand Company’.

The New Zealand Company was a private British company with the goal of obtaining as much land as possible at any cost, and the Maori would have had zero legal protections unless they were part of the British empire. Without a treaty the NZC would have been able to push out the Maori entirely with no repercussions. The British people who brought the treaty to the Maori leaders knew this was coming, and wanted to avoid it.

Signing the treaty was a quick and dirty solution to the quickly approaching NZC and was responsible for preventing the worst of the damage, but it is a very flawed document. The translations were rushed, and vague. Basically everyone was against signing it, but they knew it was the least worst option available. It was never designed to be the core document underpinning a nation, merely a speed bump to stall the private annexation of New Zealand.

The MSP430 is just the chip I happen to use at work, if you’re not convinced you could try looking for an actual ultra low power chip, I found the STM32U0 at 70uA/MHz and the STM32U5 at 16uA/MHz in the first result.

Even ignoring selecting a more efficient micro, a smattering of tiny ceramic caps will buy you a few hundred microjoules for bursts. If you’re already operating at 2V you can get a 6V rated 100uF cap in a 1210 package - and that’s after considering the capacitance drop with DC biasing. Each one of those would buy you 200 microjoules, even just one ought to be plenty to wake up for a few tens of milliseconds every second to get a reading from some onboard peripheral (as an example) then go to sleep again.

For sure, you’re not going to be doing any heavy lifting and external peripherals could be tricky, but there are certainly embedded sensor use cases where this could be sufficient.

It’s more than you think. I work with the MSP430 microcontroller, which is capable of a sleep current of 40nA @ 2V, full active mode at 140uA/MHz with all onboard peripherals turned on. With this you could achieve almost a 20% on-off ratio with a 1MHz clock, or keep it in active mode all the time at ~150kHz, which is sufficient for many embedded sensor applications.

Selective enforcement is one of those concepts that isn’t talked about much outside of legal ethics circles unfortunately, but I think it’s an important concept to be aware of and the potential issues with it. I first heard about it from The Dictators Handbook, which explores many behaviours of politicians and those in power, including how and why corrupt nations often employ selective enforcement. It’s an interesting read, would recommend. It definitely changed how I looked at the world.

I have no strong feelings on which particular weapons should be legal to carry, even if it’s just pepper spray or brass knuckles or something. The main thing is that it should be legal to carry something.

Also, selectively enforced laws are a terrible, HORRIBLE concept and should be avoided at all costs. It gives police and those in power the ability to selectively punish (or pardon) whomever they choose, often at the whims of their personal biases. Passing and exploiting selectively enforced laws is a common tactic used by corrupt nations and can be used to silence political opponents, target selected groups, promote agendas and so forth. The law should not rely on cops ‘being nice’ and choosing not to arrest you.

For a start it shouldn’t be a crime to merely carry something for self-defense. The current laws say that carrying anything for the express purpose of self-defense is illegal. There’s a bizarre cat and mouse game where the law says ‘its fine to defend yourself’ while simultaneously expressly forbidding you from carrying anything that you might be able to use for self-defense. It puts anyone actually in a life threatening situation at a supreme disadvantage: An attacker is already breaking the law so they’ll be armed to some extent, but under the law the victim is designed to be defenseless. If they do decide to arm themselves against the law and use it to defend themselves they can be prosecuted for carrying a weapon after the fact.

I never said anything about changing gun laws.

New Zealand. Gun laws are pretty strict, though we have lots of farmers who have guns for defending livestock. You can own guns with a valid reason (e.g. recreational shooting, not self defense) but essentially the only two places they can be is in a locked safe or (being transported to) a gun range.

In addition any and all tools and weapons are illegal to carry for the purpose of self defense (knives, pepper spray, tazers, clubs, screwdrivers, etc.). There’s a crime epidemic here at the moment, corner stores being robbed by people with machetes, jewelry stores ram raided with trucks, but if you dare even carry pepper spray to defend yourself you can be jailed. Don’t bother calling the cops either, they won’t be there until at least half an hour later. Cops don’t care about robberies. We literally once had the dispatcher tell us that no police would be coming. It’s ridiculous.

I wish self defense laws were less crazy here, if someone enters your home or property armed with a weapon you should be able to respond appropriately without fear of going to jail yourself.