What?! Save us? Gamera is not a threat! Gamera is the friend to all children!
No you’re right. 
OK, it depends on which quantity–for a given depth, without drag, time t squared is inversely proportional to acceleration. So, if the acceleration is reduced by 5% (my figure), the t is increased by about 2.5% (your figure).
BTW, I just read an article in the latest Rolling Stone that discusses insinuations that the increased use of DU (“depleted” uranium) in military rounds has been seen as a convenient way to dispose of radioactive waste–nevermind that it ends up as a heavy dust covering the enemy targets, and a number of American soldiers.
Piffle, likely story. 
The sandfall was not in Alaska. It started from Alaska. It is possible that it was as far South or even further South than Baja California.
I knew there was a good answer. I am in your debt.
tross, nuke, chorpler, quothz & others:
Thanks. The Sandfall burial is Key. I’ll watch for the responses.
How about just blasting it with your 1920’s style death ray? The fireworks should be pretty!
I’m not surprised that some others would support the idea. They are blissfully ignorant of the consequences. But you should know better.
Would you disturb Y’ha-nthlei and the dwellers thereof?
Would you disturb the sleep of He Who Lies Dreaming in R’lyeh?
Need I remind of you of the Pnakotic manuscripts? The Eltdown shards?
Unless …
Oh God NO!
Unless, you’re working for them!
I was thinking about what Grey said about making 100 tonne slugs and dumping them down the trench. Such a mass of radioactive waste wouldn´t generate a lot of heat?
I believe that the russians are already doing it , or have done it . Except instead of the marianas trench , the Russian Navy was disposing of old submarine reactors and fuel , in the white sea.
Declan
You know I originally posted with tongue firmly in cheek.
I’m beginning to think that this idea has merit. You don’t even need to aim at subduction zones. Deep abyssal plains will do. The hydrodynamic slugs smack into the ooze and are effectively shielded from any currents. Deep sea currents are really weak at any rate. Nobody would be able to find the bastards after they were dropped. And uranium and such doesn’t exactly evaporate. I know that it diffuses, but when it’s under thirty feet of muck, it ain’t going very far.
Am I missing something?
What if the slugs shatters against a rock?
Besides, I still want to know if such slugs wouldn´t generate a lot of heath; you know, radioactive slug hot, water around gets contaminated and rises due to convection, Godzilla tours Japan… 
I assume that’s heat there in your post. They’re wacky mixed up alloys and aren’t exactly red-hot. Warm, you bet.
God help any rock in the way of a 200 mph slug of metal…
Well as my cite details the UK, France and Belgium currently process 1000 t of radioactive waste. They vitrify (turn it into a glass like substance). It seems that their basic shape is a cylinder 1.3 m (~4’) high by 0.4 m wide (~15"). It weighs in at 2.5 t.
I’d guess that since these things get stacked together a larger single mass would act no differently. That and who wants to track 400 slugs when 10 work?
Damn! it’s 400 kg and 2500 canisters. Sorry about that.
Deep Sea Trenches MUST be radioactive already. The reason is because there are NO mechanisms (as erroneously surmised on this forum) that can dislodge mud and slurry form such high pressure environments.
- Gravity plus ocean currents necessarily mean that ALL natural radioactive species over eons of time have found their way to the LOWEST points in the oceans IE. Deep Ocean Trenches. Therefore they are already highly radioactive. The fact that they support lifeforms and are considered safe needs to be researched further. Certainly that research could pave the way for disposal of our relatively paltry human waste disposal needs in comparison to millennia of far greater natural radioactive waste inputs.
- Natural radioactivity entering the oceans is many times the amount that has been used by humans and is being disposed of continually. What we would add to the trenches is miniscule in comparison. If it could be dislodged, we would certainly be reading online articles pertaining to radioactivity in or from Deep Sea Trenches. There are NO such articles. I have searched extensively! I would have thought a Geiger counter would have been one of the first instruments used to study these trenches.
An interesting zombie thread here, I’m glad I’ve read through it … I doubt any of the posters will be around to answer any direct questions.
I’m not sure why you think naturally occurring radioisotopes would collect at the bottom of the ocean. Uranium and Thorium generally exist here in a mineral compound, and thus insoluble in water. That leaves Potassium which is a biological material. What specific species are you suggesting collects in high quantities?
Nuclear power plant waste is a bit more insidious, it decays quicker and releases more radioactivity than naturally occurring radioisotopes … Technetium, Zirconium, Caesium-135 are some of the more common of the longer lived species in nuclear waste. Even if we did get these materials in the subduction trenches, will the radioactivity stay there? What happens when it does subduct under and a couple hundred thousands years later it reemerges as a fine volcanic ash spewed into the stratosphere?
Meh …
Better to refine the waste and burn it in another reactor.
Well, “the solution to pollution is dilution,” right? Wouldn’t the radioactive material be diluted in mantle to the point that even if some did re-emerge through a volcano it would be a vanishingly small quantity? Or maybe not, I’m sure someone here knows more about this than I do.
Subduction zone volcanoes don’t get their magma from the mantle, it comes from the melted lithosphere heated by the friction of one plate moving over the top of the other. But point taken, the radioactive material would be heavily diluted. Plus we can begin the dilution process even before we dump the crap down into the trench.
Do we even have 200,000 years of uranium to run these nuclear plants? Geez, that long we would get some protection from evolutionary processes, we’d grow immune to the dangers of radiation.
Just bulldoze Fukushima Daiichi into the sea …
… Maybe into the Mariana Trench?
The radiation will poison our children and we can’t hug our children with nuclear arms.