Re: "Top Kill" FAILED -- here is what is affected ...
No doubt they've reduced the size and increased the punch in the intervening 40 years, including "dial up" yield levels between a few Kt and 250 Kt on a single device, but at a dept of 18,000 feet below the sea bed, the pressures there would be 10,000 psi. Choose too small a device and it won't generate enough pressure to compress the formation against the walls of the pipes. Also, with one pipe inside the other, it could happen that while the outer pipe is crushed against the inner pipe, it absorbs too much of the force and the inner pipe isn't crushed enough to seal off the leak. So, the blast would have to be big enough to guarantee the crushing of both pipes. Even when the drill stem fell over and the 22" pipe bent more than 90 degrees, instead bending and sealing off the inner pipe, the outer pipe cracked, allowing oil to come up the casing where the drilling mud normally flows back to the surface. IF the explosion is too big it could just shear off the pipe and create a cavern into which the oil would flow. After that cavern was filled up the oil would continue up the drill stem, unless it was capped off before the explosion.
The device would have to be placed near the base of the well stem, 18,000 feet down. The only way to get it there would be through the relief well. The device would have to fit inside the relief well and be lowered all the way to the bottom. When the relief well curves toward the leaking well the device will have to be pushed if it can't slide down the partially horizontal relief well.
In an airborne atomic blast the only source of radioisotopes is the material of the bomb itself, and the Oxygen and Nitrogen in the air. On the surface the bomb can also irradiate and heat ground materials, inducing radioisotope formation with that part of the explosion envelope which contacts or is close to the ground. In a subterranean explosion the entire fireball is enclosed by formation. ALL of the blast is absorbed by the formation. ANY material, heated high enough, can create lighter radioactive elements because the nucleus will split into lighter elements at the temperatures of a confined fission bomb. The most abundant elements in the crust are Silicon, Aluminum and Oxygen. Silicon's binding energy is 8 Mev per nucleon, which is also the approximately the same for the other two. Iron is a little more but it can be split at nuclear temperatures into two or more isotopes, some of which will be radioactive.
A simple run-a-way fission power plant produced enough radioactive material to blanket Kiev and all land within a radius of 50 miles. http://www.kiddofspeed.com/chapter1.html About 2.6 million people were evacuated. That was 24 years ago.
Originally posted by Detonate
And it would not require actually inserting it into the pipe. The immense pressure at that depth is, of course, something that would have to be dealt with. Residual radiation would not be a major problem with the proper munition.
In an airborne atomic blast the only source of radioisotopes is the material of the bomb itself, and the Oxygen and Nitrogen in the air. On the surface the bomb can also irradiate and heat ground materials, inducing radioisotope formation with that part of the explosion envelope which contacts or is close to the ground. In a subterranean explosion the entire fireball is enclosed by formation. ALL of the blast is absorbed by the formation. ANY material, heated high enough, can create lighter radioactive elements because the nucleus will split into lighter elements at the temperatures of a confined fission bomb. The most abundant elements in the crust are Silicon, Aluminum and Oxygen. Silicon's binding energy is 8 Mev per nucleon, which is also the approximately the same for the other two. Iron is a little more but it can be split at nuclear temperatures into two or more isotopes, some of which will be radioactive.
A simple run-a-way fission power plant produced enough radioactive material to blanket Kiev and all land within a radius of 50 miles. http://www.kiddofspeed.com/chapter1.html About 2.6 million people were evacuated. That was 24 years ago.
Radiation will stay in the Chernobyl area for the next 48.000 years, but humans may begin repopulating the area in about 600 years - give or take three centuries. The experts predict that, by then, the most dangerous elements will have disappeared - or been sufficiently diluted into the rest of the world's air, soil and water.
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