Bay 12 Games Forum

Please login or register.

Login with username, password and session length
Advanced search  

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Messages - PanH

Pages: 1 ... 98 99 [100] 101 102 ... 123
1486
General Discussion / Re: Things that made you sad today thread.
« on: January 18, 2013, 04:18:15 pm »
tl;dr version: The problem you guys have is that you assume people will be people and fuck it all up.
Well, they're right, but that doesn't mean said things are bad.

1487
General Discussion / Re: Technical mechanics of space colonization
« on: January 18, 2013, 04:17:01 pm »
Wikipedia, and other sources tell me that the fission part delivers the largest amount of the power. Modern multimegation thermonuclear warheads use a 3 or more stage reaction. A nuclear warheads sets of a fusion reaction, which then expells neutrons which cause the detonation of second shell of nuclear material. (Bonus for this is that the outer layer doesn't need to be weapongrade)
It widely depends on the design of the bomb. Some bombs have more than 3 stages (notably URRS ones), and some have fission third stage or fusion third stage. Each reaction also feeds from the others.
Also, do not confuse boosted with H bomb.
An hydrogen bomb is considered "clean" when less 50% of the energy comes from the fission, and "dirty" when more than 50%.

So yeah, the plant produces radiation, but not directly. As for He-3 deuterium fusion. Wikipedia Scientific PDF.
That definitively looks like something that will happens at best at 2nd generation fusion reactors. With current technology, there's no really point, because it requires more energy (higher temperature requirement), which means less outcome, and there's no real useful application of the electrons. The good point would be no radioactive waste (radioactive != radioactive waste, in occurences and effects), which isn't really worrying.
In any case, you don't want to stand in the reactor, because you'll be fried.

(btw, the pdf you sourced is less than reliable, it takes sources from blogs and such. There is definitively some interesting ideas in it, but it is far from scientific)


The main point of mass destruction weapon is intimidation. If you put one on Luna, that'll force others to develop a way to reach that silo. The lag could actually be helpful for retaliation mesures. I personnaly find it useless, because that's just continuing the nuke race.

1488

The point to use 24 hours clock, or at least, AM-PM.

You slept either 10, 22, 34, 46, 58, 70, etc hours.

1489
General Discussion / Re: The Official Bay12 - 52 books challenge 2013
« on: January 17, 2013, 08:45:51 pm »
I wonder if the poem's misunderstanding of Islam comes from ignorance, or if it's deliberate. How much did the average Christian know about the average Muslim in France at that time (1100ish)? was it a way of denying the fact that Muslims worshiped the same god as they did?
In 1100s, you could as well say Heretic as Muslim in Europe (but Spain). I think even most of people who were able to read (monks) didn't know it was the same god.

1490
General Discussion / Re: Badass Quotes Thread
« on: January 17, 2013, 06:19:37 pm »
Quote from: Pierre Cambronne
-The Guard dies, but does not surrender.
-Merde !

1491
General Discussion / Re: Humans, and eventually a colony on Mars.
« on: January 17, 2013, 05:57:25 pm »
There are no fusion only bombs. (To be fair, there are a few designs for them, but those are theoretical. The so called neutron bombs).
This is what I said. Hydrogen bombs use the energy from the atomic bomb for a fusion reaction, which produce the thermonuclear explosion. I have a bit of doubt about from what reaction comes the most power, because that's not exactly what tells me other sources, nor correspond with the development "booster" and "super" design. But there's no really public studies about it.
Actually, I've been surprised to find out that neutrons bombs exists, but are not as inefficient. They use the same design as hydrogen bombs (so, with an atomic bomb too), but release the neutrons which makes it more aggressive towards organic and electronic, but with smaller explosion.


Now, deuterium-tritium reaction, which is the considered reaction (I've seen nowhere talking about H² He-3 reaction, nor about "catching electron from reaction").
Deuterium : 1 proton, 1 neutron
Tritium : 2 neutron, 1 proton
When combined, they'll form a 2 neutrons, 2 protons (Helium), and a free neutron. The helium is not radioactive. But the neutron (not radioactive in itself), if absorbed by other particles, can often make the said particles radioactive, like the inner plating (which will then be radioactive waste).
Neutrons in itself are not radioactive. Of course, it's dangerous for (as said), organics, as if you become radioactive yourself (do not try this at home), but on other materials, it change them into radioactive waste (most are not very dangerous, but some can be nasty). For more things about radioactive effects of neutrons.

From what I saw about tritium, there is currently an unused stock from current nuclear (fission) plants which will not be enough for future or electricity use. That's why they are trying with ITER, to produce tritium, within the reactor, with lithium and the help of said neutrons.

Fakedit : I'd rather be pessimist and surprised, than be optimistic and dissapointed.

1492
General Discussion / Re: Humans, and eventually a colony on Mars.
« on: January 17, 2013, 01:34:09 pm »
No matter what the ultimate system is, I think we'll see breakeven before the end of the decade, and commercial power production perhaps ten years after that point.

I think that's a bit optimistic. I'd say at least 30 years.

ITER is about feasibility, so won't produce anything.

1493
General Discussion / Re: American Politics Omnibus Megathread of DOOM
« on: January 17, 2013, 01:31:43 pm »
If France can avoid Mali becoming the latest Vietnam I will be suprised, but people need to leave them to make the mistake instead of thinking they can jump in and make some kind of a difference. Thankfully the UK seems to have learnt this from its own adventures in the middle east and isnt providing combatants yet.

It isn't quite Vietnam. There is 750 soldiers currently, and they want to have 2500 soldiers. The main reason (well, what is said), is to protect the thousands of french living in Mali. It's also not meant to be any offensive, only defensive, but on the other hand, french forces also took Gbago's bunker (or with the support of heavy weapons, but we'll probably never know).

1494
General Discussion / Re: Humans, and eventually a colony on Mars.
« on: January 17, 2013, 01:06:55 pm »
The only reason the hydrogen bomb comes out positive is because you want to produce heat (so a 100% recuperation efficiency), and because the fusion stage is actually used as a trigger for the ternary fission stage.

Secondly, fusion plants are still radioactive. They just don't produce radioactive waste. The reaction does produce errant particles, which have to be stopped. This also causes lot's of wear on the inner reactor plating. Second gen fusion would mostly solve this, as electricity is litteraly a product of the reaction.
While the primary fuel is easy to find, both tritium and He-3 are extremely hard to find. The first can be made in labratories and in the reactor itself, but it still increases costs.
Other problems with fusion is the fact that they have to be extremely large scale, operate a ludricous temperatures* and cost a lot.

*The main point of the Iter is to test if the design can actually resist the heat.
You're not talking about hydrogen bombs, but about improved atomic bombs that use fusion to accelerate the fission reaction. Hydrogen bombs are in 2 parts : an atomic bomb, and an hydrogen bomb. The atomic bomb will detonate, allowing the fusion reaction, which is the thermonuclear explosion.

Fusion does produce radioactive waste, with a shorter life than the fission waste (only a few decades), but does not produce radioactivity. The helium produced isn't dangerous. If you're afraid of radioactivity by fusion plant, you should be afraid of the air radioactivity (and of the errant particles in the air too).
Tritium is produced in large quantity by our current fission reactors, so there should be no issue. You can also make deuterium only fusion reactions, and they will even produce tritium. You could indeed use Helium3 for the reaction, but there is no real point in it when a H² H^3 reaction produce the same quantity of energy (in fact, I've never heard of a prototype using He3).

There is different designs that are planned. The ITER will indeed need to be light up at a very high temperature. The point is to produce at least 10 times the energy received to heat it (50MW to 500MW for the ITER).
A nuclear plant of 1GW costs 1.1$ billion, the ITER cost currently 16€ billion (probably more till it's finished).

I also found some neat things. It appears USSR has sent about 40 nuclear reactors in space, for various experiments. US sent one, in 1965.

1495
General Discussion / Re: Humans, and eventually a colony on Mars.
« on: January 16, 2013, 11:56:01 pm »
And, PanH, there's a big difference between a bomb and a reactor. If you can't tell which a design is going to be, it's wrong no matter what the intention is.
A bomb is a reactor (well, for atomic bombs at least).

For the bomb, you let the energy out of control, for maximum damage.
For the plant (or civilian use), you use it for different purposes (testing, producing electricity, etc), which is quite more complex, and not fully mastered yet. I don't see any "wrong" there.

Hydrogen bomb was an exemple "in use".

1496
General Discussion / Re: Amazingly Stupid Things You've Heard People Say
« on: January 16, 2013, 11:22:36 pm »
Generalizations like that are bad. People are attracted to people.

Isn't that generalizing generalizations ?

1497
General Discussion / Re: American Politics Omnibus Megathread of DOOM
« on: January 16, 2013, 11:20:32 pm »
Not as likely as you would think. I have a source for this, Take the Milgram Experiments

I remember that some people made a TV show like this experiment.

1498
General Discussion / Re: Humans, and eventually a colony on Mars.
« on: January 16, 2013, 11:07:45 pm »
There is some civilians [Fusion generator] prototypes running, and an important test plant should be finished in 2020 (including already 3 years late). Lots of prototypes are running since years, even though they're mainly about testing, potential uses, and not much about energy production.
And it's already used since decades in military devices.
Wut?  I've not heard a thing about fusion power, civilian or military, having been "in use" at all.  They've got various machines where, for a few milliseconds or so they can pump in a huge amount of power and momentarily get...  well, I'm not even sure if they've broken even, just yet, but a (not so?) huge amount back for just that moment, straight from the fusion (or from the heat generated, or something)...  But they're a long way from being self-sustaining.

Unless I've been asleep and missed something.

Hydrogen bomb.

For civilians project, there is some reactors, most of them being built in 80s, for testing and application purposes. The ITER, which would technically work the same as a plant (but for thermal tests, mostly) is being built.
For others military projects, there is some lasers that are being built to improve the atomic/nuclear bombs.

The + (for electricity plants) :
No radioactivity
3 to 4 times more energy than actual nuclear plant
Easy to find fuel (²H)

The - :
Need a lot power to actually start the reaction (i.e. atomic bombs are detonator for hydrogen bombs)

There's probably some other things, but I'm not an expert (or maybe we didn't discovered them yet).


1499
General Discussion / Re: Humans, and eventually a colony on Mars.
« on: January 16, 2013, 02:43:13 pm »
While fusion is indeed promising, I doubt we'll see it soon. Sustainable Fusion generator power's output ranges from a midsize nuclear generator to a small country.
There is some civilians prototypes running, and an important test plant should be finished in 2020 (including already 3 years late). Lots of prototypes are running since years, even though they're mainly about testing, potential uses, and not much about energy production.
And it's already used since decades in military devices.

1500
General Discussion / Re: Humans, and eventually a colony on Mars.
« on: January 16, 2013, 02:21:32 pm »

Solar and wind power aren't enough for humans needs, as for the low production, and for the variability (because, you don't use the same amount of energy sleeping, the morning, the evening, night, etc).

Considering we're talking about the future, I would more consider fusion reactor, with easy fuel requirements. Of course, there's still issues, as it's very complex, and needs a lot of energy to be set up, etc. And it also needs a quite big settlement to use all the energy produced. But the potential for this technology are just huge.

Pages: 1 ... 98 99 [100] 101 102 ... 123