Misplaced Pages

Revision as of 20:58, 4 December 2004

Use

I added a section stating: DU munitions (in the form of tank and naval artillery rounds) are also deployed by the armed forces of the UK. Evidence for this is found in on p56, which quotes a Lewis Moonie, a UK defence minister : Two types of DU-based munitions are available to British Forces, a 120 mm anti-tank round and 20 mm round used by some Royal Navy ships. I didn't add this to the main page's references, as I figure the issue is minor and uncontentious, and the quoted document as a whole isn't suitable source material. -- Finlay McWalter 22:55, 18 Sep 2003 (UTC)

I cannot find any reference to France exporting depleted uranium weapons and rather references to France not being too hot on these. I'll remove this paragraph until somebody finds a reference.

France also export depleted uranium munitions, including some made to be used in the 100mm guns used on older Soviet T54 and T55 and Chinese Type 1959 and Type 1969 tanks, old Soviet SU100 tank destroyers, and old Soviet 100mm antitank guns (these old tanks and antitank guns are very common around the world, due mainly to Soviet military aid during the Cold War).David.Monniaux 00:44, 27 Mar 2004 (UTC)

Toxicity

concern about chemical toxicity of depleted uranium munitions: is this about the remains of used munition or also about handling munition? - Patrick 08:05 Dec 27, 2002 (UTC)

Estimating harm of small amounts of radiation

Recent studies of scientific bodies outside the USA and the UK

Which studies? Where can one find them?

Small amounts of radiation may even be more harmful to the body as bigger doses may be. While bigger doses kill cells, smaller doses only damage them. While dead cells are replaced by the body, these damaged cells are a possible source of cancer.

As far as I know, that is nonsense. What kind of study said that? The more radiation you get (the integral), the worse it is. It is false that "big doses kill cells" while "smaller doses only damage them", both big and small doses kill and damage a certain amount of cells, but of course big do more of both, killing (some cellules) and damaging (many others).

I suggest this be removed, and the source for any other claims be verified. -- jbc May 27 10:14 UTC 2003

This isn't nonsense, it's the basis for chemotherapy. That's why radiation is used to treat cancer - or maybe it's not used anymore, I'm not up on this. Strong doses of radiation will kill weak (e.g. cancerous) cells and leave healthy cells still alive, hopefully. I don't find this passage that ridiculous. Graft

I think you mean 'radiotherapy', not 'chemotherapy'. A higher intensity of (normally local) radiation can be better than low intensity, and of course different kinds of radiation affect in different ways, but in the article it is said dose, which is just the total amount integrated. And for the same kind of radiation, the higher the dose the worse it is (you may still want a high dose to treat a cancer, but that's a very particular case, it's because it is more effective against cancer, not better for the rest of the body). By the way, I didn't say it was ridiculous! Change "nonsense" for "wrong" if you prefer a less loaded word, that's what I should have said anyway. - jbc May 28 08:37 UTC 2003

Article about the damage by radiation: http://www.heise.de/tp/deutsch/inhalt/lis/14534/1.html And something in English as well: http://www.pnas.org/cgi/content/abstract/99/19/12220 . The German article above seems to refer to the English article mentioned right after it. As far as I know, that is pretty good proof, especially when remembering my VERY conditional style when adding these things to the article, so suit yourself.

--Korpo

http://www.heise.de/tp/deutsch/special/irak/14636/1.html German article about possible harm about DU ammunition, http://www.physik.uni-oldenburg.de/Docs/puma/radio/Uran_Munition.html#_3.4_Uranverbindungen about DU aerosols, http://www.heise.de/tp/deutsch/inhalt/co/12222/1.html refers to a UN study about DU ammunition. --Korpo

Uhm, I didn't mean any personal attack or anything, sorry if it looked like that. Thanks for adding the links, I think that the article has improved much with them. About the effects of radiation, please see my reply to Graft a few lines above. And just in case you were wondering, I am as much against the use of DU as one can be. - jbc May 28 08:37 UTC 2003

I think the bullet point stating Small amounts of radiation may even be more harmful to the body than bigger doses may be should be removed. This assertion is extremely speculative, and it does seem like nonsense on the face of it. I skimmed the studies, none of which made any firm conclusions, and nowhere did I see this assertion made. The studies themselves dealt with the repair of individual chromosomes and did not make any claims on the effects of lower vs. higher doses of radiation on "the body" of a real creature, or even on an individual cell! The bullet point consists of speculation atop speculation, and damages the credibility of the rest of the article. Tempshill 23:23, 18 Sep 2003 (UTC)

Guess now I have the facts I need to supply for my claims added into the link section. --Korpo

Got carried away ;). Well, a little sting to pride may pretty well produce results and is one of the best cures for laziness (as I was too lazy to add my sources). So no bad feelings there ;) --Korpo

NPOV ?

IAEA papers

I think the article comes off too much on the side of opponents of DU usage, and downplays the evidence against its danger by falsely implying that such evidence comes only from the US and UK. I'd consider the International Atomic Energy Agency one of the more reliable sources of such information, and they claim that DU has little if any health risks. They're also hardly known as a US ally, being of the principal critics of the US's handling of the Iraq thing. Their information page about DU can be found here: . In particular, see their answer to the question "Is DU a health hazard", here: (the conclusion is "no"). --Delirium 22:49 19 Jul 2003 (UTC)

Edited to add this information (while not removing the other information). --Delirium 22:54 19 Jul 2003 (UTC)

Hrmm, having only glanced at it, that report seems to deal specifically with Kuwait and the 1991 Gulf war, not other wars where the DU exposure may be higher... Evercat 22:55 19 Jul 2003 (UTC)

Oops sorry I hadn't seen the second page. OK. Fair enough. Evercat 22:56 19 Jul 2003 (UTC)

Link 3 above no longer works; the IAEA site apparently has been reorganized. --Alan Nicoll 19:58, Nov 22, 2004 (UTC)

Other reasons for critizism, use of Uranium in history, non-fissibility, etc.

Moved this here because it's style is non-NPOV. Besides interesting information it contains blatant lies.

“Some of us believe that this issue is a red herring, and US military use of depleted uranium is condemned for exactly the same reasons as napalm, cluster bombs, and antipersonnel flechette munitions were decades ago: a not-inconsiderable number of European intellectuals hate America and will seize upon anything whatsoever that they can imagine a way to criticize in order to create a controversy where none existed before.”

This is highly speculative. Also, wikipedia should not express "our" opinion.

“Note that uranium has long been known to be less toxic than lead; uranium compounds were used commonly in glazes for pottery in Europe for more than one hundred years (if you collect antique earthenware or pottery, you may have some in your collection--look for pottery with a deep red, orange, or burnt umber glaze, dating from before 1940), because it was known to be less toxic than lead. Uranium salts were also once added to decorative glassware to give the glass an iridescent gold or green appearance; this glassware is called Annagruen or Annagelb glass in Germany, or "vaseline glass" in the US.”

Information about the toxiciy is welcome, though i think the historic use of uranium salts in glasses should fits better on the page about.

“To the extent that uranium demonstrates toxicity, it acts as a heavy metal toxin similar to lead or mercury, differing principally in that it tends to accumulate in the kidneys first and begin causing damage there rather than in the central nervous system (and it is quite capable of killing you, just as mercury or lead is). Depleted uranium is not especially radioactive (it is what's left after the fissile isotopes are removed for use in nuclear power or nuclear weapons) and does not seem to present any significant radiological hazard. As a heavy metal toxin, tungsten is considerably more poisonous than uranium.”

DU has about 40% the radioactivity natural Uranium. Nobody every claimed that there was a danger of nuclear fissions with DU.

Misplaced Pages should not try to make one side look silly by showing false or silly arguments for that side. — Hokanomono 09:31, 16 Mar 2004 (UTC)

amount of U235 still present

The artical states there is about 0.2% U235 left in the "depleted uranium". I have other sources that state 0.3% so how sure are we of this number.

Natural uranium is about 0.71% U235 so this leaves us with 0.2/0.71 = 28% approximately. 0.3% U235 yeilds 42%

The artical states 60% of the natural radioactivity is still present. Is this in fact the case?

From http://web.ead.anl.gov/uranium/guide/depletedu/index.cfm, "Most of the Department of Energy's (DOE) depleted uranium inventory contains between 0.2 to 0.4 weight-percent uranium-235". I don't have a source handy, but I recall that DU has about half the radioactivity of natural uranium. Most of the reduced radioactivity is from the removal of U-234. Even pure U-238 is radioactive, but my understanding is that the chemical toxicity is more important than its radioactivity. pstudier 05:20, 2004 Nov 30 (UTC)

Mods to section on ISOTOPES. This needs review!

Broken link to "Uranium Proliferation Nice Joke"

Clarification of the term "depleted"

Is "depleted uranium" depleted in the DICTIONARY definition of depletion?

There is anywhere from 28 to 42% of the original U235 still present and the radioactivity is "quoted" as being anywhere from 60% of refined uranium to 28% depending on the isotope concentration and the relative contributions of each isotope.

I am a late comer to this artical and I made some minor changes. I'm not here to take sides.

I think this artical should be edited to break out three (3) sections headed "natural uranium" "enriched uranium" and "depleted uranium". Then the section on "isotopes" should be moved up and placed right behind the main discussion and BEFORE any mention is made of "natural" "enriched" or "depleted". As it stands now it wanders a bit and there are contradictions.

The term "depleted" will be interpreted by a layman as "safe" or "nor containing radioactivity". A more spophisticated layman might think "not useful in a reactor". None of these concepts are correct. IMHO the term "depleted" is spin doctoring at its best. Depleted has to be treated with as much respect as natural uranium.

Can we contrast the radioactivity of the three (3) categories of uranium against other radioactive isotopes? We have a section on RADIOACTIVITY but there are no numbers. We also have a section on RADIOACTIVE CONTAMINATION and again no numbers.

By half life we should get something like this:

Representative half life and radioactivity relative to U238:

Isotope half life half life relative

                           percentage      radioactivity

Pu239 24,300 0.00054 183,868 Pu242 373,000 0.00835 11,979 Pu244 80,800,000 1.80842 55 U232 68.9 0.0000015 64,847,605 U233 159,200 0.00356 28,065 U234 245,500 0.00549 18,200 U235 703,800,000 15.75201 6 U236 23,420,000 0.52405 191 U238 4,468,000,000 1.00000 1

From this we can see U235 is about 6 times as radioactive as U238.

If the above analysis is correct then all forms of uranium whether enriched to a low percentage as in 3-7% or depleted are about the same overall when it comes to radioactivity. This also is noteworthy because when we look at this - U232 is so highly radioactive that we don't have much to speak about.. its practically non-existant.

Eg pure 100.0% U238 = 1.000 Natural 99.3% U238+0.7% U235 = 0.993x1 + 0.007x6 = 1.035 3.5% more Enriched 99.7% U238+0,2% U235 = 0.997x1 + 0.003x6 = 1.015 1.5% more

So the quoted estimates from 28% to 60% are all incorrect if this analyis is correct. Which is it?

Clarification of the term "depleted"

Note: THis is a repeat of the former post which si all screwed up thanks to reflowing the text.

Is "depleted uranium" depleted in the DICTIONARY definition of depletion?

There is anywhere from 28 to 42% of the original U235 still present and the radioactivity is "quoted" as being anywhere from 60% of refined uranium to 28% depending on the isotope concentration and the relative contributions of each isotope.

I am a late comer to this artical and I made some minor changes. I'm not here to take sides.

I think this artical should be edited to break out three (3) sections headed "natural uranium" "enriched uranium" and "depleted uranium". Then the section on "isotopes" should be moved up and placed right behind the main discussion and BEFORE any mention is made of "natural" "enriched" or "depleted". As it stands now it wanders a bit and there are contradictions.

The term "depleted" will be interpreted by a layman as "safe" or "nor containing radioactivity". A more spophisticated layman might think "not useful in a reactor". None of these concepts are correct. IMHO the term "depleted" is spin doctoring at its best. Depleted has to be treated with as much respect as natural uranium.

Can we contrast the radioactivity of the three (3) categories of uranium against other radioactive isotopes? We have a section on RADIOACTIVITY but there are no numbers. We also have a section on RADIOACTIVE CONTAMINATION and again no numbers.

By half life we should get something like this:

Representative half life and radioactivity relative to U238:

From this we can see U235 is about 6 times as radioactive as U238.

If the above analysis is correct then all forms of uranium whether enriched to a low percentage as in 3-7% or depleted are about the same overall when it comes to radioactivity. This also is noteworthy because when we look at this - U232 is so highly radioactive that we don't have much to speak about.. its practically non-existant.

Eg

pure 100.0% U238 = 1.000

Natural 99.3% U238+0.7% U235 = 0.993x1 + 0.007x6 = 1.035 3.5% more

Enriched 99.7% U238+0,2% U235 = 0.997x1 + 0.003x6 = 1.015 1.5% more

So the quoted estimates from 28% to 60% are all incorrect if this analyis is correct. Which is it?

I believe it depends on the refinement process used, although I have never heard of a separation process (in the West at any rate) that has contamination of 20%-60%. TDC 19:35, Sep 9, 2004 (UTC)

In this context, depleted means that all the U-235 which can be economically separated from the uranium has been, and thus the depleted uranium left is waste. The term was never intended to imply that there is no radioactivity left. Typically depleted uranium is about half as radioactive as natural uranium, because it is also depleted in U-234. pstudier 02:38, 2004 Nov 30 (UTC)

Major Re write Needed

After casually observing this article for a few weeks, I think I can safely say that it needs some serious revision work. All major peer reviewed studies performed on the health impacts of DU and their use in combat have all come back and said the same thing, there is no noticeable risk. This includes studies from lab settings, Kosovo, and Kuwait. After reading this article one would most certainly not get that impression.

I will rewrite sometime within the next week, and put it up for comment.

TDC 19:35, Sep 9, 2004 (UTC)

It seems that traces of U236 have been found in depleted uranium used by US forces in Yugoslavia (we'd need to find the source). U236 is formed by neutron capture by a U235 atom, which can only happen in nuclear reactors. It would thus seem that, at least for some time, the USA have used nuclear waste to build these ammunitions. Nuclear waste can also contain traces of Plutonium, which is extremelly toxic (chemically, that is). This alone qualifies depleted Uranium ammunition as a dangerous and harmful thing. Rama 11:27, 1 Dec 2004 (UTC)

I don't have the reference handy, but I recall that nuclear fuel used to be reprocessed in the US, and the extracted uranium re-enriched, leaving DU with traces of U236 and Plutonium. These traces do not add significantly to the radioactivity of DU. pstudier 21:02, 2004 Dec 1 (UTC)

They probably do not, but traces of plutonium can be enough to chemically comtaminate rivers, for instance. The chemical nuisance of plutonium is such that it makes its radioactivity a joke danger in comparison... Rama 21:45, 1 Dec 2004 (UTC)

NPOV tag?

I have just removed the NPOV tag. It was put there a few days ago by an anonymous user without it being clear here why on this page. Perhaps it was related to the section on adverse health effects or otherwise, but who knows. Did the user feel it is too biased towards saying there are adverse health effects or too biased against there not being any. Perhaps they object to the definition of "depleted". Perhaps it is for some other reason. Who knows?

I have therefore assumed (perhaps incorrectly) that this was just trolling. Apologies in advance if it was genuinely meant, but if you put it back then please make the reason clear here. Then at least we will know what to discuss to address it. --Jll 20:58, 4 Dec 2004 (UTC)