I design them so I won't give you numbers either. For the discussion I was just trying to put it into perspective outside of naval vessels (i.e., lets assume you take the screw off and replace the installed generators with efficient commercial ones). As you aptly pointed out on a navy vessel they have different goals from a commercial power plant.
The reason you would do this is so that you can have them be portable to very remote locations. Also, by building them in one location you can take advantage of economic scales, presuming that you are always building some of them. Another benefit is that you don't have to do a specific site design to account for local geograph (just check that the river/ocean is deep enough for the vessel). The last synergy is that when the core is depleted Just drive the boat home (probably using some deisel engines) and the nuclear power plant is gone and can be taken care of at a specialized shipyard/facility. The security issues are the similar for land based and ocean based reactors (you could argue that guarding a ship is more difficult because maybe Bin Ladden is training navy seal type frog men to attact). However, the ship can be moved if there is a credible threat.
The reactor vessels are water tight and withstand very high internal pressures. The reason the ocean doesn't crush them if they sink is because they are filled with water and since it is ~incompressible the water on the inside balances the forces.
Fuel rods are typically stationary. What moves are control rods, typically made of materials with high neutron cross sections like Hf. Reactors can also put nuclear poison into the reactor coolant to help reduce the reactivity of the core. You are correct about reactors (at least all of the ones I am familiar with) do have fail safe systems that shut down the reactor during an accident. They plant can produce all of the power it needs (just like navy vessels). Therefore, it needs no other power source.
There are major differences in the required design criteria for the nuclear industry than for the oil industry. That is why is takes years to get licence approval for a new reactor. It also takes years to get site approval. If done correctly there is nothing to worry about. See the many other posts about the US Navy's record.
These are not even that big. According to wiki (http://en.wikipedia.org/wiki/Nuclear_marine_propu lsion) the military has "Reactor sizes rang[ing] up to 190 MWt in the larger submarines and surface ships." The article is not clear weather the power rating is MWt (thermal) or MWe (electric) but even if it is electric the military reactors mentioned at wiki would still likely have equivalent electric output since the conversion from thermal to electric runs about 25%. Just for comparison the AP1000 is supposed to have 1000MW electric output.
The US and Russian Navies have been doing this for 50 years! This is the first commercial venture to do it, but the military has done it safely and effectively. The US Navy has over 5500 reactor years of operations without a nulcear accident. Also, this is not the first time that power from these reactors has been put into the power grid. Any US Navy vessel that is in port and connected to shore power (which they almost always do in port) can and have provided electricity to the grid if needed. This was done in charleston after a huricane.
When I was an intern at a company that was in a competition with other companies to get business from lockheed they sent out a CD with power point slides on it that showed how our company rated against other companies. They had "scrubbed" the presentation so that we didn't know who anyone was except for our own company. There were many Excel graphs in the slides. It turns out that not only were the graphs embedded in the slides but the entire spreadsheets to make them were too. This allowed me to find the code to un-scramble which companies were which. I am not sure if this was/still is an "exploit", but at least something that every one should be aware of.
This has been a very big issue for corpoprations and politicians for years now (think of Disney getting copyright extensions for mickey mouse), but only recently due to the advances in technology has it become a household issue.
You are many orders of magnitude off on the mass of a star. The mass of the earth is 5^24 kilograms, so use that as a reference point The sun is ~ 1 billion times the mass of the earth.
"Cola" is a generic term for a certain type of soft drink, but "Coca-Cola" is not.
In Texas all softdrinks are called Coke. Are their settlements for trademark infringement bigger there too?
You still have a choice. It is the same one you always have. To buy or not to buy! If you don't like the prices (i.e., that movie isn't worth that much to you) keep your money and move along.
I could be usefull if all you wanted to do was determine if the person "logged in" was the actual person who created the account. Then you just have the two person problem. Yes, two people out of the many people online could have a very similar profile, but what are the odds that the guy hacking your account has the same profile (not very good).
"They go on to say that the method they suggest for detecting a fradulent user "do not require that users have truly unique profiles." "
This could be problematic for two individuals who use the same account. For example, my wife and I use the same account for some financials but we have drastically different habits and paterns while using the computer.
Tyler: The average payout of a settlement is A, the probability of occurence is B, and the cost of a recall is C. IF A*BC We don't do one!
Lady On Plane: What car company do you work for?
Tyler: A major one.
Besides the jokesters, the problem with this is infrastructure. With all of the electricity stored in the car the current roads are still good. Otherwise you get to spend billions and billions to upgrade.
But what do I do about the really fat guy sitting next to me that is spilling into my seat even after I get the armrest down after a half hour struggle.
A couple of quarters ago yahoo gave similar guidance and there was a couple of day slump for google then they beat the street expectations. People are forgetting this could be the economy slowing down or Yahoo just giving market share away to competitors (like google).
I guess one small thing that is different is the kind of on disc art that you can do. CD you can paint one side or use a lable of some kind. I have seen some old records (a styx album) that had the band name only show up when the light hit it at the right angle.
Pretty cool looking but I don't know if that in itself is much of a reason to stick with LPs
Depends on what you mean by "Jet engine". Small gas turbines can spin at 20,000 RPM no problem. Do the fans on the 777 spin at 20,000 RPM? No, but just because it is small does not mean it is any less a jet engine.
Jet Engine can be any of the following: Zero bypass gas turbine, low bypass gas turbine, RAM propulsion, SCRAM propulsion, even turbo fans, prop fans ect. are all powered by gas turbines which can be considered "jets"
Slashdot Mirror
I design them so I won't give you numbers either. For the discussion I was just trying to put it into perspective outside of naval vessels (i.e., lets assume you take the screw off and replace the installed generators with efficient commercial ones). As you aptly pointed out on a navy vessel they have different goals from a commercial power plant.
The reason you would do this is so that you can have them be portable to very remote locations. Also, by building them in one location you can take advantage of economic scales, presuming that you are always building some of them. Another benefit is that you don't have to do a specific site design to account for local geograph (just check that the river/ocean is deep enough for the vessel). The last synergy is that when the core is depleted Just drive the boat home (probably using some deisel engines) and the nuclear power plant is gone and can be taken care of at a specialized shipyard/facility. The security issues are the similar for land based and ocean based reactors (you could argue that guarding a ship is more difficult because maybe Bin Ladden is training navy seal type frog men to attact). However, the ship can be moved if there is a credible threat.
The reactor vessels are water tight and withstand very high internal pressures. The reason the ocean doesn't crush them if they sink is because they are filled with water and since it is ~incompressible the water on the inside balances the forces.
Fuel rods are typically stationary. What moves are control rods, typically made of materials with high neutron cross sections like Hf. Reactors can also put nuclear poison into the reactor coolant to help reduce the reactivity of the core. You are correct about reactors (at least all of the ones I am familiar with) do have fail safe systems that shut down the reactor during an accident. They plant can produce all of the power it needs (just like navy vessels). Therefore, it needs no other power source.
There are major differences in the required design criteria for the nuclear industry than for the oil industry. That is why is takes years to get licence approval for a new reactor. It also takes years to get site approval. If done correctly there is nothing to worry about. See the many other posts about the US Navy's record.
These are not even that big. According to wiki (http://en.wikipedia.org/wiki/Nuclear_marine_propu lsion) the military has "Reactor sizes rang[ing] up to 190 MWt in the larger submarines and surface ships." The article is not clear weather the power rating is MWt (thermal) or MWe (electric) but even if it is electric the military reactors mentioned at wiki would still likely have equivalent electric output since the conversion from thermal to electric runs about 25%. Just for comparison the AP1000 is supposed to have 1000MW electric output.
The US and Russian Navies have been doing this for 50 years! This is the first commercial venture to do it, but the military has done it safely and effectively. The US Navy has over 5500 reactor years of operations without a nulcear accident. Also, this is not the first time that power from these reactors has been put into the power grid. Any US Navy vessel that is in port and connected to shore power (which they almost always do in port) can and have provided electricity to the grid if needed. This was done in charleston after a huricane.
When I was an intern at a company that was in a competition with other companies to get business from lockheed they sent out a CD with power point slides on it that showed how our company rated against other companies. They had "scrubbed" the presentation so that we didn't know who anyone was except for our own company. There were many Excel graphs in the slides. It turns out that not only were the graphs embedded in the slides but the entire spreadsheets to make them were too. This allowed me to find the code to un-scramble which companies were which. I am not sure if this was/still is an "exploit", but at least something that every one should be aware of.
The accredidation boards have nothing to do with the government.
This has been a very big issue for corpoprations and politicians for years now (think of Disney getting copyright extensions for mickey mouse), but only recently due to the advances in technology has it become a household issue.
So I should have checked my facts BEFORE submitting. The mass of the sun ~ 333000 times the mass of the earth.
You are many orders of magnitude off on the mass of a star. The mass of the earth is 5^24 kilograms, so use that as a reference point The sun is ~ 1 billion times the mass of the earth.
"Cola" is a generic term for a certain type of soft drink, but "Coca-Cola" is not. In Texas all softdrinks are called Coke. Are their settlements for trademark infringement bigger there too?
You still have a choice. It is the same one you always have. To buy or not to buy! If you don't like the prices (i.e., that movie isn't worth that much to you) keep your money and move along.
Does streaming video count if you don't have a TV card?
I could be usefull if all you wanted to do was determine if the person "logged in" was the actual person who created the account. Then you just have the two person problem. Yes, two people out of the many people online could have a very similar profile, but what are the odds that the guy hacking your account has the same profile (not very good).
"They go on to say that the method they suggest for detecting a fradulent user "do not require that users have truly unique profiles." " This could be problematic for two individuals who use the same account. For example, my wife and I use the same account for some financials but we have drastically different habits and paterns while using the computer.
Then stop sending them your money!!!
Tyler: The average payout of a settlement is A, the probability of occurence is B, and the cost of a recall is C. IF A*BC We don't do one! Lady On Plane: What car company do you work for? Tyler: A major one.
Besides the jokesters, the problem with this is infrastructure. With all of the electricity stored in the car the current roads are still good. Otherwise you get to spend billions and billions to upgrade.
But what do I do about the really fat guy sitting next to me that is spilling into my seat even after I get the armrest down after a half hour struggle.
A couple of quarters ago yahoo gave similar guidance and there was a couple of day slump for google then they beat the street expectations. People are forgetting this could be the economy slowing down or Yahoo just giving market share away to competitors (like google).
I guess one small thing that is different is the kind of on disc art that you can do. CD you can paint one side or use a lable of some kind. I have seen some old records (a styx album) that had the band name only show up when the light hit it at the right angle. Pretty cool looking but I don't know if that in itself is much of a reason to stick with LPs
Depends on what you mean by "Jet engine". Small gas turbines can spin at 20,000 RPM no problem. Do the fans on the 777 spin at 20,000 RPM? No, but just because it is small does not mean it is any less a jet engine. Jet Engine can be any of the following: Zero bypass gas turbine, low bypass gas turbine, RAM propulsion, SCRAM propulsion, even turbo fans, prop fans ect. are all powered by gas turbines which can be considered "jets"
How does riding a segway get you off your feet all day? You stand on the platform all day instead.