Reversing Global Warming: Individual vs Corporate Responsibility?

[hitssquad]

Tacit vs explit political thrust vectors

"environmentalists" tacitly support coal power

I'm not sure what you base this comment on.

Tacitly has the opposite meaning of explicitly. Russ's comment could be based partly upon environmentalist's (such as the Sierra Club corporation) explicit non-support of coal power.

It has been pointed out repeatedly by various observers over a period spanning several decades that claiming that solar, and solar-derivative, power can easily replace nuclear power is ultimately tacit support for coal power since it inevitably turns out to not be true.

 

[russ_watters]

Yes, that's correct. By actively working against nuclear power - to the point where it became impossible to build new plants - while paying only lip-service to the dangers of coal power - allowing coal plants to continue to be built - they have helped enable the last 20 years of air pollution. As a direct result of their own actions, they have achieved the exact opposite of their stated goals. They may honestly dislike coal power, but they are not doing what needs to be done to get rid of it.

Re: The Sierra Club:

Like virtually all "environmentalist" groups, the Sierra Club focuses on problems, not solutions. Nuclear power was a "problem" that needed to be stopped, and they succeeded it getting it stopped. But nuclear power isn't like saving the whales - with whales, the problem and the solution are the same: whales are becoming extinct, so if you stop killing them, they won't become extinct. With nuclear power, just stopping nuclear power does not address the nuclear plant's reason for existence: electricity. As a result, by stopping nuclear power, and not pushing a viable alternative, "environmentalist" groups open the door for utility companies to do the next-best thing, economically: which in virtually all cases means either coal or oil.

Now that nuclear power has been defeated and coal power expanded, "environmentalists" are poised to strike their next blow against the enviroment. The new issue is "The Hydrogen Economy". I have little doubt that within my lifetime, we will be well on the way to replacing gas in our cars with hydrogen. But the way "environmentalists" (and thus, the politicians) are approaching the issue now, they are again failing to address the root problem: electricity. As a result, there is a serious risk that "The Hydrogen Economy" will have a devistating impact on the environment and human health:

As it stands today, "The Hydrogen Economy" will be powered by FOSSIL FUEL.

http://www.whitehouse.gov/news/releases/2003/02/20030206-12.html is a 2 year old speech by Bush on the issue (Kerry's views were similar in the last election). In it he says:

And there's a lot of advantages that I want to explain to the American people about why this initiative makes sense. First, the hydrogen can be produced from domestic sources -- initially, natural gas; eventually, biomass, ethanol, clean coal, or nuclear energy.

Nuclear is not really on the table. All the rest are fossil fuels, and while you can reduce emissions quite a bit from today's levels (with or without the "Hydrogen Economy" part - so why even bother with that until you've already got "clean coal" and biomass?), they are all interim solutions. Nuclear power allows for the possibility of completely eliminating the use of fossil fuels and the associated pollution.

 

[hitssquad]

The challenges of 100% nuclear

Nuclear power allows for the possibility of completely eliminating the use of fossil fuels and the associated pollution.

It is expensive to use nuclear power to supply anything other than continuous 24/7 baseload electrical service, unless pumped storage is utilized. France has this problem, and that nation only uses 75-80% nuclear power in its mix. In other words, unlike how nuclear is done in the United States where the plants only provide 20% of the electricity mix and therefore can run 24 hours a day at full output, France modulates the power of, and/or turns on and off, some its nuclear power reactors. Since the plants aren't running continuously at or near their full capacities, their financing costs become relatively overwhelming and this ultimately gets reflected in the high cost per kwh of electricity in France.

Unless it became cheap to build nuclear power plants, or an energy storage option — such as one incorporating industrial-sized fuel cells — became cheap, 100% nuclear power would be a serious challenge to implement in either the United States or France.

 

[SOS2008]

So because environmentalists are concerned about hazardous waste from nuclear plants, one can conclude that they therefore are in favor of coal? Clearly one would deduce this.

 

[hitssquad]

Unintended results and tacit support of coal power

So because environmentalists are concerned about hazardous waste from nuclear plants, one can conclude that they therefore are in favor of coal?

No. It's like human slaying. One does not have to intend to kill someone in order to do it. Involuntary manslaughter is defined as killing without intent, as opposed to voluntary manslaughter and homocide which are defined as killing with intent.

One can bring about unintended results in other areas, as well. Claiming that solar and solar-derivative power can easily replace nuclear might advantage coal, without the speaker intending his words to have that effect. Hence the phrase, "Environmentalists who oppose nuclear in favor of solar tacitly support coal." As with involuntary manslaughter, it is in theory possible for energy activists to bring about unintended results.

 

[russ_watters]

It is expensive to use nuclear power to supply anything other than continuous 24/7 baseload electrical service, unless pumped storage is utilized.

Unless it became cheap to build nuclear power plants...

Well, a big part of that cost is in the red-tape that goes into building a plant. But your point is well taken. Regardless, however much you can reduce emissions from a coal plant, you can reduce emissions to zero by replacing that plant with a nuclear one.

So because environmentalists are concerned about hazardous waste from nuclear plants, one can conclude that they therefore are in favor of coal? Clearly one would deduce this.

That isn't what I said. Please reread.

SOS, you tell me: if an "environmentalist" group throws their effort into torpedoing a proposed nuclear plant and they succeed and a coal plant gets built instead, what have they accomplished? What's even more ironic is when "environmentalists" torpedo a proposed wind plant.

 

[GENIERE]

Frustrating ain't it?

 

[SOS2008]

Not to belabor the point further...

...But "environmentalists" won't allow it to be done. But at the same time, the same "environmentalists" tacitly support coal power, which has proven to kill people. This self-contradictory, hipocritical homicidal lunacy is why I put "environmentalist" in quotes for so many organizations (most environmentalist organizations)

Tacitly means implied. Implied means on purpose but not openly expressed. If you have proof that environmentalists purposefully support the use of coal, please source it. Otherwise, the majority of what is being posted is very informative and appreciated.

 

[hitssquad]

On a highway to coal, no stop signs or speed limits

Tacitly means implied.

And those coal-favoring implications of their advocacy of solar as a replacement for nuclear seem to be beyond their conscious awarenesses.


--
implicit

(2) : involved in the nature or essence of something though not revealed, expressed, or developed : POTENTIAL *the oak is implicit in the acorn* *a sculptor may see different figures implicit in a block of stone— John Dewey* *the drama implicit in an idea becomes explicit when it is shown as a point of view which a person holds and upon which he acts— F.J.Hoffman* b (1) : not appearing overtly : confined in the organism *implicit behavior* *implicit speech* (2) of a culture : capable of being derived only as an implication from behavior : not apparent or overt to the people it characterizes : tacit and underlying
--
(M-W Unabridged 3.0)


I don't think implicitness requires one to know what one is implying. For if one does not know what one is implying, implying it certainly cannot be purposeful. If you think that Mexico is the country to the north of the U.S. and that Canada is the country to the south, and you set out on a trip from the U.S. to what you think is to Mexico saying, "I'm off to Mexico, heading north 2,000 miles, and I know I'm going north because I can see the 9AM sun to my right," the implication of your statement is that you are going to end up in Canada.

Likewise, if you set out on that road trip more-simply saying, "I'm heading off north 2,000 miles, and I know I'm going north because I can see the 9AM sun to my right," the implication is again that you are going to Canada, regardless of whether you know that or not. So whether you are traveling to a certain given country purposely or not, your destination is implied.

The prototypical environmentalist in Russ's claim that environmentalists tacitly support coal by opposing nuclear in favor of solar claims to be traveling down the highway of solar-powered "sustainability," but an acute observer willing to do a few calculations on the back of an envelope can see that that highway leads straight to coal.

 

[SOS2008]

And those coal-favoring implications of their advocacy of solar as a replacement for nuclear seem to be beyond their conscious awarenesses.


--
implicit

(2) : involved in the nature or essence of something though not revealed, expressed, or developed : POTENTIAL *the oak is implicit in the acorn* *a sculptor may see different figures implicit in a block of stone— John Dewey* *the drama implicit in an idea becomes explicit when it is shown as a point of view which a person holds and upon which he acts— F.J.Hoffman* b (1) : not appearing overtly : confined in the organism *implicit behavior* *implicit speech* (2) of a culture : capable of being derived only as an implication from behavior : not apparent or overt to the people it characterizes : tacit and underlying
--
(M-W Unabridged 3.0)


I don't think implicitness requires one to know what one is implying. For if one does not know what one is implying, implying it certainly cannot be purposeful. If you think that Mexico is the country to the north of the U.S. and that Canada is the country to the south, and you set out on a trip from the U.S. to what you think is to Mexico saying, "I'm off to Mexico, heading north 2,000 miles, and I know I'm going north because I can see the 9AM sun to my right," the implication of your statement is that you are going to end up in Canada.

Likewise, if you set out on that road trip more-simply saying, "I'm heading off north 2,000 miles, and I know I'm going north because I can see the 9AM sun to my right," the implication is again that you are going to Canada, regardless of whether you know that or not. So whether you are traveling to a certain given country purposely or not, your destination is implied.

The prototypical environmentalist in Russ's claim that environmentalists tacitly support coal by opposing nuclear in favor of solar claims to be traveling down the highway of solar-powered "sustainability," but an acute observer willing to do a few calculations on the back of an envelope can see that that highway leads straight to coal.

The real point for me is that environmentalists do not support the use of coal. To avoid further derailment of productive discussion, perhaps we should agree to disagree, and if anyone wants to PM me, please feel free to do so.

 

[russ_watters]

Sometimes people have to make tough choices between two things they don't want, or drop support for things they know they can't have, SOS. "Environmentalists" choose not to oppose coal with the vehemence with which they oppose nuclear and as a result, coal plants get built and nuclear plants do not. "Environmentalists" choose not to (or are unable to) make tough choices like: 'I know I can't have solar power, so I'll support nuclear power since it is better than coal.'

However, I will agree that this is slightly OT, since their opposition to nuclear power is irrational on its own. Its right up there with opposing immunizations because they hurt or because 1 in a million people get sick from them. As I said before, the solution to the question raised in the OP is simple in principle: be rational.

If you disagree, I would very much like to see a link from an environmentalist website that outlines a doable energy plan. And by "doable" I mean something we can start on right now and will have minimal impact economicallly.

 

[russ_watters]

YOU!: Fix the Environment!

My biggest criticism of "environmentalism", as I have said before is that it focuses on problems and not solutions. I'm a put-up-or-shut-up type of guy - I like fixing problems more than arguing over who'se fault it is. That's why I'm an engineer. So to parallel a thread I started in the engineering forum (YOU!: Fix the US Energy Crisis!), this is a thread about solutions to our environmental problems. The groundrules will be similar to that thread:

First, though most would agree there are issues, people won't necessarily agree on what they are/what the most important are. So define the problem as you see it before proposing the solution. As I see it, the biggest problem is air pollution, which conveniently, makes the pollution problem and the energy problem essentially the same.

Second, I want specific, coherent plans. Don't just say 'reduce CO2 emissions' - tell me how.

Third, economics and politics of course make this tricky. Try to give plans that would work (from an engineering standpoint) and would at least have a little chance of happening (from a political/economic standpoint). 'Build a solar array to cover the Mojave Desert' would work, but it would be so expensive that I don't think its viable (though if you disagree, please feel free to argue why). 'Build a 10 TW fusion plant' is completely unacceptable since we don't have a means to do it at all right now.

 

[russ_watters]

Figures depend on who you ask, but the first hit I got on google was http://www.enotes.com/air-pollution/ :

In the United States, traffic fatalities total just over 40,000 per year, while air pollution claims 70,000 lives annually. U.S. air pollution deaths are equal to deaths from breast cancer and prostate cancer combined.

To me, that makes air pollution a huge, "right now" priority. Screw global warming - it might be a problem 50 or 100 years from now, which means people are going to argue about it for the next 50 or 100 years without doing anything about it. Air pollution kills now.

Since, as I said, the pollution and energy issues are roughly the same to me, making explanation of my plan here pretty easy. My plan laid out in detail in post 2 of that other thread, but to summarize:

1. Immediately impose heavy restrictions on emissions from all sorts of fossil fuel use points - coal plants, oil plants, HVAC systems (oil, gas), cars, etc. And no 10 year phase-in crap - do it now. This means, primarily, coal power plants though. Technology exists to greatly reduce their pollution with little difficulty (just money, and not really that much) - require its immediate implimentation. Close other loopholes - trucks and ships aren't as well regulated as cars, for example. This cost would largely be absorbed by the economy, but my guess is it would be several tens of billions of dollars. I wouldn't retrofit consumer items, but I would require retrofitting all power plants. In ten years, we could drop our air pollution output by an order of magnitude.

2. Build 100 new nuclear plants, right now. Yes, it would be expensive - though it doesn't have to be that expensive if the irrational environmentalism doesn't get in the way (but that's a topic for another thread...). I figure in 20 years, building 100 new plants would allow for closing roughly half our coal plants (while still increasing production).

3. Increase funding for fusion by an order of magnitude or more. In 10 years or so, we should have a good idea of how close we are to making it viable. If it doesn't appear imminent in 10 years, start building the next 100 fission plants. If it looks viable, start building fusion plants.

4. Reward sensible conservation (ie, make the cost of compact fluorescents, heat recovery systems, hybrid cars, etc. tax deductable).

5. Twenty years from now, after a good 100 new fission plants are in operation, another 100 are close behind them, and half of our coal plants are gone, start the transition to the hydrogen economy. And start production on the 3rd 100 new fission plants. Hittsquad - you mentioned how nuclear can't be throttled. Well, as you mentioned, hydrogen production is the perfect off-peak use for nuclear power.

I'm backing off my support of solar - after some of the things I've learned from discussions here, I have my doubts that it will ever be viable. I think a nuclear-hydrogen economy is the key.

edit: Oh yeah...

Politically, what needs to happen for this to work? Simple - people need to get serious about it. Yeah, ok, I know - that's simple in principle but not in practice. But think about it: how much political capital is there for a politician to lose by proposing these things? Is the coal lobby really that strong that it makes more sense to not clean up our coal plants than to gain a million votes by doing it? Is the "environmentalist" lobby really that strong (yeah, I'll get to that in another thread...) that you can't get people to be rational about nuclear power? I really don't think there is much to lose politically - politicians just need to get the cajones to ignore their lobbyists and do what the public really wants/needs.

Some of what I propose will be extremely expensive - some of it will not. At the very least, the inexpensive things should not have a problem passing if the public would just start caring a little bit. Green Mountain Energy has proven that even a fraud can sell clean energy for a higher price. There is no reason why we shouldn't be able to get real clean energy to sell for the same price.

 

[Pengwuino]

Is the "environmentalist" lobby really that strong (yeah, I'll get to that in another thread...) that you can't get people to be rational about nuclear power?

Yes, yes it is lol. Run a few ads and show Chernobyl and Hiroshima and you'll scare a few million idiots back into line. Then of course you'll immediately invoke the "liberal" organizationsl ike moveon.org or the green party that'll do the political trashing that'll move the ideologs into place and you've pretty much got the stone wall setup against it.

What exactly are the theoretical $ figures for implimenting the huge solar arrays needed to power the US? (across the mojave as you said hehe).

My professor made a joke yesterday that whenever he wants to talk to someone and they ask about his profession, he says he's an astrophysicist and if he doesn't want to talk to someone, he'll say he's a nuclear physicist "or better yet, an atomic physicist".

 

[russ_watters]

What exactly are the theoretical $ figures for implimenting the huge solar arrays needed to power the US? (across the mojave as you said hehe).

We discussed it in detail in a thread I can't find, but off the top of my google... (and some good info in THIS thread)

-The US's current total generation capacity is 750,000MW.
-A decent solar panel generates about 10 watts per square foot.
-An inexpensive solar panel costs about $5 per watt.

So... (check my math):

To cover the US demand of 750,000MW would require about 2,700 square miles of solar panels at a cost of $3.75 trillion.

This does not include other equipment (probably about equal to the cost of the panels themselves), inefficiencies (night time), or government bureacracy. Realistically, these things would increase the actual cost by as much as an order of magnitude - so its probably more like $30 trillion. (The US annual GDP is $10 trillion and the federal budget is about $2.6 trillion)

If you want the array to handle a "hydrogen economy", double its size.

 

[Informal Logic]

As I said before, the solution to the question raised in the OP is simple in principle: be rational.

If you disagree, I would very much like to see a link from an environmentalist website that outlines a doable energy plan. And by "doable" I mean something we can start on right now and will have minimal impact economicallly.

A little boy pulls a little girl's hair, and the little girl says she doesn't like her hair to be pulled. So the little boy starts poking her. By your logic, the little girl prefers to be poked.

You can go to web sites such as the Sierra Club's and see nothing but anti-coal information. The request was made of you to support your claim and find a source showing that environmentalists support the use of coal.

Now, can we get off the inane debate of semantics, etc. and move on?

 

[russ_watters]

A little boy pulls a little girl's hair, and the little girl says she doesn't like her hair to be pulled. So the little boy starts poking her. By your logic, the little girl prefers to be poked.

Invalid analogy: The little girl can have neither - the Sierra Club can't. Grown-ups do sometimes have to choose between two things they don't want. Grown-ups are supposed to be mature enough to make tough choices - to make the best of the choices availabe. That's supposed to be what it means to be a grown-up.

Edit: here is an analogy perhaps democrats can get behind: "A vote for Nader is a vote for Bush." Its something democrats said a lot to try to get people to vote for Kerry (Gore) instead of Nader. How many Nader voters really preferred Bush to Kerry (or Gore)? Probably virtually none, right? Yet through their decisions, they helped Bush get elected twice.

You can go to web sites such as the Sierra Club's and see nothing but anti-coal information. The request was made of you to support your claim and find a source showing that environmentalists support the use of coal.

Again, not what I said. Please reread (with particular attention to the word "tacit").

 

[SOS2008]

http://www.waterfurnace.com/content.aspx?section=why&page=faqs2
--
Can a geothermal system also heat water?
Yes. Some geothermal heat pumps can provide all of your hot water needs on demand at the same high efficiencies as the heating/cooling cycles. An option called a desuperheater can be added to most heat pumps. It will provide significant savings by heating water before it enters your hot water tank.
--
A geothermal heating system uses electricity to run water pumps and refrigerant compressors to extract heat from (and, for house cooling, transmit heat to) the ground. The electrical power used is a fraction of the heating and cooling power harnessed. Check out Monolithic Dome home designer Jim Kaslik's geothermal system:
http://www.monolithic.com/gallery/homes/kaslik/comfort/qhca-d-03.pdf

That link has the most information on Jim's geothermal system, but here is more on his very unique Dome house in general:
http://www.monolithic.com/gallery/homes/kaslik/

His Dome house has 5300 square feet of heated living space, and he says his maximum monthly HVAC cost would be $95 if he ran it 24/7 but that he never needs to run it that much to maintain comfortable temperature and a by-design relative humidity of 35-45%. And, yes, Jim has a fireplace, but I don't know if he ever uses it. You could ask him since he hangs out on the Monolithic Domes Institute BBS answering questions:
http://bbs.monolithic.com/

I've meant to reply to this. The desuperheater is a very interesting concept. My A/C Heat Pump unit is located on the side of the home, and the hot water tank is located in the garage. If I'm understanding this correctly, the two need to be hooked up in some way to work together. BTW - I have had plumbers/repairmen over the years tell me that placing extra insulation around the water tank isn't really worth it here in Phoenix. In fact, in the summer it can take a bit of time to get water to cool when you want cold water. But certainly winter is cold enough to get freezing temperatures on some nights. Anyway, I'll try to find a company that knows about desuperheaters.

 

[hitssquad]

My A/C Heat Pump unit is located on the side of the home, and the hot water tank is located in the garage. If I'm understanding this correctly, the two need to be hooked up in some way to work together.

Well, your heat pump can only heat your house to about 90 degrees, right? I don't have any experience with heat pumps, but I would assume that you would need a special one to be able to heat to the much higher temperatures of water heaters.

 

[russ_watters]

I've meant to reply to this. The desuperheater is a very interesting concept. My A/C Heat Pump unit is located on the side of the home, and the hot water tank is located in the garage. If I'm understanding this correctly, the two need to be hooked up in some way to work together. BTW - I have had plumbers/repairmen over the years tell me that placing extra insulation around the water tank isn't really worth it here in Phoenix. In fact, in the summer it can take a bit of time to get water to cool when you want cold water. But certainly winter is cold enough to get freezing temperatures on some nights. Anyway, I'll try to find a company that knows about desuperheaters.

You have an air source heat pump, don't you? Ie, there is a big (3 feet high/wide) cylindrical heat sink with a fan in the middle sitting next to your house? Water source heat pumps reject their heat into some water source (usually groundwater) - and they are relatively rare.

That said, the general concept (linking HVAC units and hot water heaters) is something I'm really in favor of. And it really shouldn't be that hard to clamp a heat exchanger onto the refrigerant piping of an a/c unit, for whatever purpose (I could see recovering some heat-of-rejection in the summer to heat water - the article is talking about using the heat pump cycle itself to heat water).

And yes, a house kinda needs to be designed with such forms of heat recovery in mind.

 

[SOS2008]

You have an air source heat pump, don't you? Ie, there is a big (3 feet high/wide) cylindrical heat sink with a fan in the middle sitting next to your house? Water source heat pumps reject their heat into some water source (usually groundwater) - and they are relatively rare.

That said, the general concept (linking HVAC units and hot water heaters) is something I'm really in favor of. And it really shouldn't be that hard to clamp a heat exchanger onto the refrigerant piping of an a/c unit, for whatever purpose (I could see recovering some heat-of-rejection in the summer to heat water - the article is talking about using the heat pump cycle itself to heat water).

And yes, a house kinda needs to be designed with such forms of heat recovery in mind.

Wow, thanks! For where I live, I was wondering if I should worry about the energy to heat water, but if I can afford the upfront cost, I'm for it. Of course the big cost here is air conditioning. I have a tile roof, sunscreens on all the windows, and ceiling fans, but can't think what else to do to lower this need.

 

[Astronuc]

Certainly improving efficiency of transportation systems is one way.

I heard about the following in a NPR's Day to Day radio program:

http://slate.msn.com/id/2112608/
Why Iraq hawks are driving Priuses.
By Robert Bryce
Posted Tuesday, Jan. 25, 2005

President Bush has a simple policy about energy: produce more of it. The former oilman has packed his administration with veterans of the oil and coal industries. And for most of the first Bush term, his energy policy and his foreign policy were joined at the hip. Since the Bush administration believed that controlling the flow of oil from the Persian Gulf was critically important to the American economy, the invasion of Iraq seemed to serve both the president's energy goals and his foreign policy ones.

But a curious transformation is occurring in Washington, D.C., a split of foreign policy and energy policy: Many of the leading neoconservatives who pushed hard for the Iraq war are going green. James Woolsey, the former director of the Central Intelligence Agency and staunch backer of the Iraq war, now drives a 58-miles-per-gallon Toyota Prius and has two more hybrid vehicles on order. Frank Gaffney, the president of the Center for Security Policy and another neocon who championed the war, has been speaking regularly in Washington about fuel efficiency and plant-based bio-fuels.

The alliance of hawks and environmentalists is new but not entirely surprising. The environmentalists are worried about global warming and air pollution. But Woolsey and Gaffney—both members of the Project for the New American Century, which began advocating military action against Saddam Hussein back in 1998—are going green for geopolitical reasons, not environmental ones. They seek to reduce the flow of American dollars to oil-rich Islamic theocracies, Saudi Arabia in particular. Petrodollars have made Saudi Arabia too rich a source of terrorist funding and Islamic radicals. Last month, Gaffney told a conference in Washington that America has become dependent on oil that is imported from countries that, "by and large, are hostile to us." This fact, he said, makes reducing oil imports "a national security imperative."

I was quite impressed.

 

[Ivan Seeking]

I think a nuclear-hydrogen economy is the key

More later, but I'm coming to the same conclusion. Considering how seldom agree, I think that's saying something. I think we need to watchdog the nuclear industry as if the world depends on it, but we seem to be running out of time with too few immediate options. I also think that biodiesel and farm produced ethanol are practical options now. From what I understand, biodiesel burns much cleaner than petroleum diesel. I also think that other future solutions are worthy of hot pursuit, but I will elaborate more when I have the time and focus; when I'm not on good pain drugs for my oral surgery yesterday.

Before I forget, that stupid aircar might really do what the builders claim. I just saw another story about it and it seems to be past the obvious hoax stage. I don't see how, but it appears that it really is competitive [IIRC, actually claiming about 20-30% cheaper to operate] with gasoline powered automobiles.
http://www.theaircar.com/

 

[gerben]

I too think that a nuclear-hydrogen economy is the key. With modern technolgy we should be able to do this very safe. Burning things should become old fashioned and dirty in the future.

Here is a very interesting article about the so-called "pebble-bed reactor":
http://wired-vig.wired.com/wired/archive/12.09/china.html?pg=1&topic=china&topic_set=

 

[hitssquad]

PBMRs don't have anything to do with the future of nuclear power, Gerben.

 

[gerben]

PBMRs don't have anything to do with the future of nuclear power, Gerben.

I am not sure what you mean (what does PBMR stand for?). Do you mean that this kind of reactors have no chance of being used in the future?

here is a quote from the link I posted

To meet that growing demand, China's leaders are pursuing two strategies. They're turning to established nuke plant makers like AECL, Framatome, Mitsubishi, and Westinghouse, which supplied key technology for China's nine existing atomic power facilities. But they're also pursuing a second, more audacious course. Physicists and engineers at Beijing's Tsinghua University have made the first great leap forward in a quarter century, building a new nuclear power facility that promises to be a better way to harness the atom: a pebble-bed reactor. A reactor small enough to be assembled from mass-produced parts and cheap enough for customers without billion-dollar bank accounts. A reactor whose safety is a matter of physics, not operator skill or reinforced concrete. And, for a bona fide fairy-tale ending, the pot of gold at the end of the rainbow is labeled hydrogen.

 

[hitssquad]

aircar might really do what the builders claim. [...] it appears that it really is competitive [...] with gasoline powered automobiles.

You mean it will produce better acceleration times, or better slalom times, or both?

 

[Pengwuino]

Oh yah, nothing like a dictatorship that cares little about public safety going at it with nuclear power! There going to ruin it for the dumb American public :(

 

[Ivan Seeking]

You mean it will produce better acceleration times, or better slalom times, or both?

I meant the cost to operate. They showed a side by side comparison of the dollar cost to drive 90 miles for both. Also from what I gather, this was demonstrated, not just claimed. I haven't done the math but at 4000 PSI maybe it really makes sense. I was inclined to believe that the system would be too inefficient to be practical; and since there was no thermo data available it seemed even more like a fraud of some sort.

 

[hitssquad]

4 out of 5 terrorists agree - the U.S. should build lots of PBMRs

what does PBMR stand for?

http://www.google.com/search?q=pbmr+pebble

Do you mean that this kind of reactors have no chance of being used in the future?

China is interested. South Africa is interested. However, regarding the United States, the Nuclear Regulatory Commission (NRC) wants the pebbles to be flawless since prototypical PBMRs do not use containment shells and therefore the pebbles perform the job of final environmental barrier from the radionuclides within. Also, not having a containment shell would seem to make a nuclear power reactor an attractive target for kamikaze pilots.

 

[hitssquad]

Designing the perfect unsellable vehicle

I meant the cost to operate.

Americans buy safety, luxury, performance, and looks. There are low-operating-cost 2/3-liter diesel cars sold in Asia. Americans refuse to buy them, so they aren't sold here. And there are cars that are sold in America that only cost ~$4,000 per year to own and drive. Americans refuse to buy these as well, at least at a reasonable markup, so manufacturers push them on the public for less than it costs to make them. They do this to meet the CAFE requirements.

Americans are finicky car buyers. It might amaze an observer to see what Americans won't buy because it does not have enough performance or because it is not luxurious enough or because their bosses/co-workers/clients/friends/neighbors might think it looks dorky.

If you want to build a low-performance, ugly, unsellable car, you don't need to look to alternative powertrains. Gasoline and diesel powertrains are already fully capable of being designed into unsellable vehicles, if that is the goal.

 

[gerben]

since prototypical PBMRs do not use containment shells and therefore the pebbles perform the job of final environmental barrier from the radionuclides within. Also, not having a containment shell would seem to make a nuclear power reactor an attractive target for kamikaze pilots.

They can of course be built with a containment shell.
For example on https://www.pbmr.com/ you can read:

The PBMR does, in fact, have a very robust civil structure, which protects the reactor from severe external events (such as an aircraft crash or an earthquake). In addition, one of the fundamental design differences between current generation reactors and High Temperature Gas-cooled Reactors (HTGRs) with coated particle fuel is the individual 'containment' function of each fuel particle. The inherent design of these fuel particles, coupled with the advanced design of the reactor, means that a major or severe loss of containment is not possible.

I do not know if this would be the best way to go with nuclear energy, I just found the article that I linked interesting. It seems that PMBRs are much safer than conventional reactors.

"The Pebble Bed Modular Reactor (PBMR) is based on a simple design, with passive safety features that require no human intervention, and that cannot be bypassed or rendered ineffective in any way.

In all existing power reactors, safety objectives are achieved by means of custom-engineered, active safety systems. In contrast, the PBMR is inherently safe as a result of the design, the materials used, the fuel, and the physics involved. This means that, should a worst-case scenario occur, no human intervention is required in the short or medium term.

Nuclear accidents are principally driven by the residual power (decay heat) generated by the fuel after the chain reaction, caused by radioactive decay of fission products, is stopped. If this decay heat is not removed, it will heat up the nuclear fuel until its fission product retention capability is degraded and its radioactivity is released.

In 'conventional' reactors, the heat removal is achieved by active cooling systems (such as pumps) and relies on the presence of the heat transfer fluid (e.g. water). Because of the potential for failure in these systems, they are duplicated to provide redundancy. Other systems, such as a containment building, are provided to mitigate the consequences of failure and provide a further barrier to radioactive release.

In the PBMR, the removal of the decay heat is achieved by radiation, conduction and convection, independent of the reactor coolant conditions. The combination of the very low-power density of the core (1/30th of the power density of a Pressurized Water Reactor), and the temperature resistance of fuel in billions of independent particles to high-temperature, underpins the superior safety characteristics of this type of reactor." (from: https://www.pbmr.com/)

 

[Pengwuino]

So it'll cost 3 trillion for solar power.

How much would it cost to build enough nuclear power plants for our countrys power needs?

 

[Ivan Seeking]

If you want to build a low-performance, ugly, unsellable car, you don't need to look to alternative powertrains. Gasoline and diesel powertrains are already fully capable of being designed into unsellable vehicles, if that is the goal.

I think this situation has improved and will continue to do so. For one, the price of gasoline now makes alternatives more attractive. In fact we talked about this once before wrt the hybrid autos. People are buying them. The thing about the air-car is that is has zero emissions; it's as clean as the grid. Also, I see this as practical for crowded cities. Obviously commuters have different needs. For you and I for example, heck, do you want to drive to Portland in a toy car with SUV's and Semi's on the road?

Oh yes, I throw out the suggestion for your consideration that in addition to meeting stiffer clean air standards, the size of personal vehicles should be limited somehow. Perhaps lanes could be dedicated to vehicles under a certain weight, or some roads could be for small vehicles only. Maybe the speed limit for anything but small cars should be the same as for tractor-trailers. The fact is that size does matter when it comes to efficiency; so make it inconvenient to drive large vehicles. Also, many people buy large vehicles because they are safer; and for good reason. For example, a Prius vs a Suburban is not a pretty match. This makes the playing field incredibly unfair for those who are trying to be responsible. We must do so by risking our lives when forced to share the road with large vehicles.

 

[2CentsWorth]

So if nuclear power has become safer, and the waste remains the concern, what happened to the ideas about shooting it into the sun? Not realistic, either logistically, theoretically, or it's just not cost effective?