Slashdot Mirror
NASA's Plutonium Supply Dwindling; ESA To Help
astroengine writes "NASA's stockpile of the plutonium isotope Pu-238 is at a critical level, causing concern that there won't be enough fuel for future deep space missions. Pellets of Pu-238 are used inside radioisotope thermoelectric generators (or RTGs) to generate electricity for space probes traveling beyond the orbit of Mars — solar energy is too weak for solar arrays at these distances. Blocked by a contract dispute with Russia to supply Pu-238 and the US Department of Energy that has not been granted funds to produce more of the isotope, NASA lacks enough of the radioisotope to fuel the future joint NASA-ESA mission to Europa. However, the head of the European Space Agency has announced that they have plans to commence a new nuclear energy program to alleviate the situation."
A more pressing question in my mind is why aren't there any private companies making it for NASA? Does the NRC prohibit private companies from producing it?
I'm sure somewhere in the US exists a company with the technical expertise and equipment to make it. And when I'm pretty sure companies are still willing to cash government checks... I guess I don't understand "shortages" in synthesized isotopes. I heard a while back there is another isotope synthesized in Canada that we have to buy because there isn't enough in the US or something like that. I don't get it.
You can't legislate goodness. Let each to his own destiny, by will of his freely made choices.
Also, at the time they were producing Plutonium, it was taking almost 10% of the power the country was generating at the time.
Maybe they could use a Radioisotope Photoelectric Generator instead, at least for power, and save the Pu238 just for heating. From my understanding of it, limited since the only article (from 1981) I've ever read about it was the one I linked to, a RPG can use any gamma ray emitting isotope and will have full power for a period equal the half-life of the isotope used. And IIRC there are still several reactors in the US that can generate isotopes.
Never heard anything more about it, anyone else know more?
At the beginning, where Isaac describes the slowly decaying Galactic civilization; that's what the United States reads like more and more.
The signs are everywhere: Leadership that's seriously out of touch with the people; infrastructure that's still good but getting worse; dwindling education, increasing racial tension and population segregation; etc.
We remember the good old days, and the good old days WERE brighter. Technology overall still advances, but what's not advancing is our position in it. Thanks to a distinctly anti-intellectual culture and an increasing distrust of "da gubbmint" combined with a ridiculous war, our economy is in a shambles, our regulations are a mess, and our population often seems more interested in "being heard" than listening long enough to identify the problems.
I find it sad to see our nation on the decline.
I have no problem with your religion until you decide it's reason to deprive others of the truth.
That in itself doesn't say very much, does it?
Have you ever seen a typical home that hasn't been touched since the late 40's-50's? It had a refrigerator, a radio everyone huddled around, a single light bulb and one outlet in each room (there being very few rooms to begin with), if you were fortunate--two outlets if you're very lucky. They didn't have central air, or big screens TVs and computers humming along all day, burning through thousands upon thousands of kWh.
I see that 10% number float around from time to time. Don't know where it comes from, or if it's remotely accurate at all--but if I had to guess: should we undertake *ALL* of that energy research and weapon building today, it would be dwarfed compared to the country's power bill for A/C alone.
Constitutional rights may be respected, repealed, or modified; but they must never be ignored.
There's a real question as to whether the US still has working nuclear weapons. Much of the production capability was shut down years ago. For over a decade, the US had lost the capacity to make nuclear "pits". They used to be made at Rocky Flats, which shut down in 1993. Los Alamos now has a limited production capability for new nuclear pits, but no pit made there has been tested in an actual detonation. The complete ban on nuclear testing, even underground, means there's some doubt about whether new physics packages actually work. Current practice is to build duplicates of designs from the 1970s.
One of the non-radioactive materials for H-bombs is out of production, and attempts to make more of it have not been successful.
There's also a tritium shortage. Tritium, with its short half-life, has to be replaced periodically. That's getting to be a problem.
The second team is building these things today. Early atomic bombs were designed by Nobel prizewinners. Today, the people involved are far less qualified and not very motivated. Almost everybody who ever designed a bomb that went off has retired. There's a proposal to design a "dumber bomb" with a very long shelf life, but without testing, nobody really has confidence that would work.
The agency in question is probably the NRO. So basically, it has gone from NASA into the NRO black space project.
Ceterum censeo Carthaginem delendam esse