Plutonium Levels in Sediments Remain Elevated 70 Years After Nuclear Tests
June 24, 2025,
https://www.marinetechnologynews.com/news/plutonium-levels-sediments-remain-650328
Researchers from Edith Cowan University (ECU) in Australia have confirmed plutonium levels in sediment up to 4,500 times greater than the Western Australian coastline.
Three plutonium-based nuclear weapons tests were conducted at the Montebello Islands in the 1950’s, which introduced radioactive contamination to the surrounding environment. The first nuclear test, coded Operation Hurricane, had a weapon’s yield of some 25kT, and formed a crater in the seabed, while the second and third tests, dubbed Operation Mosaic G1 and G2, had weapons yields of around 15kT and 60kT, respectively.
The three tests released radioactive isotopes including plutonium, strontium (90Sr) and caesium (137Cs) into the surrounding marine environment.
“Plutonium is anthropogenic, which means that it doesn’t exist on its own in nature. The only way it is introduced into an environment is through the detonation of nuclear weapons and from releases from nuclear reprocessing plants and, to a lesser extent, accidents in nuclear power plants,” said ECU PhD student and lead author Madison Williams-Hoffman.
“When plutonium is released into a coastal setting in the marine environment, a significant fraction will attach to particles and accumulate in the seabed, while some may be transported long distances by oceanic currents.”
The region is not inhabited by humans and has not been developed, however it is visited by fishing boats, so collecting data on the levels of contamination in the marine environment is important.
Currently, the protected island archipelago and surrounding marine areas also reside within the Montebello Islands Marine Park (MIMP). The MIMP is ecologically significant due to the presence of numerous permanent or migratory species, and its high-value habitat is used for breeding and rearing by fish, mammals, birds and other marine wildlife.
The water and sediment quality within the MIMP are currently described as ‘generally pristine’, and it is fundamental to maintain healthy marine ecosystems in the region.
The concentrations of plutonium at Montebello Islands were between 4 to 4,500 times higher than those found in sediment from Kalumburu and Rockingham from the Western Australian coastline, with the northern area of the archipelago, close to the three detonation sites, having four-fold higher levels than the southern area.
The concentrations of plutonium found in the sediment at Montebello Islands were similar to those found in the sediment at the Republic of Marshall Islands (RMI) test sites, despite 700-fold higher detonation yields from nuclear testing undertaken at RMI.
Plutonium is an alpha emitter so, unlike other types of radiation, it cannot travel through the skin and is most dangerous when ingested or inhaled.
The research was undertaken by Williams-Hoffman, under the co-supervision of Prof. Pere Masqueand at ECU and Dr Mathew Johansen at ANTSO.
Trump’s rap sheet is long, but this may top them all
The International Atomic Energy Agency (IAEA) has not blown the whistle as claimed by the Australian government, nor has the UK or our European allies.
any resolution to condemn the bombing of Iran will be vetoed by the US , presumably with the support of Australia
The Age, Geoffrey Robertson , 24 June 25, – (print version)
Although few may bother to point this out, Trump has just committed a crime much worse than all the others on his rap sheet.
It is the war crime of aggression- the “supreme” war crime, according to the judgement at Nuremberg. It is constituted by using armed force against a felloe United Nations member with such “character, gravity and scale” that it violates the UN charter prohibition on one member country attacking another. A “spectacular military success, the bombing of Iran’s nuclear facilities may have been, but it was, as a matter of international law, no different from Russia’s attack on Ukraine, or the George W Bush Tony Blair, John Howard invasion of Iraq. These a all cases of a breach of the world order agreed after the last war and likely to encourage emulation.
This is not about saving Iran, or the danger of making Putin look better. If any government in the world deserves to be destroyed, it is the mullahs without mercy in Iran. Many of them were involved in the mass slaughter of political prisoners in1988 – the worst crime against POWs since the Japanese death marches. – and ever since their record of killing peaceful protestors, women and dissidents has been disgusting. Iran has bankrolled terrorist organisations and wagedpropaganda wars against the Big (US) and Little (UK) Satan, but it has not invaded Israel or done anything to America to justify its aggression.
Were some hypothetical war crimes court ever to get its hands on Israeli Prime Minister Benjamin Netanyahu, it would reduce his sentence by taking Iranian provocation into account – but the man would still be guilty as charged. He could not argue self-defence, which requires the threat defended against to be reasonably proximate. The threat of Iran building and using nukes is much further away than the threat of Israeli submarines, said to be already stationed within range of Tehtan.
It is not even clear that Iran is close to building a nuclear weapon – several dozen countries also signatory to the nuclear weapons treaty by which they forswear any such development. could build nukes within a few months. The International Atomic Energy Agency (IAEA) has not blown the whistle as claimed by the Australian government, nor has the UK or our European allies.. And just like Saddam Hussein’s “weapons of mass destruction” there is no reason to think Iran has completed a project that in fact started under .the Shah in the 1970s.
Only last wee, Trump said in effect to the Ayatollah, in the tone of a gangster “Wee know where you live”, but he promised the cleric he would be safe “for now” and gave him two weeks. He bombed three days later (This is a man on whose word Australia has just made a down payment for AUKUS).
The true disaster of Trump’s attack is that it is another nail in the coffin of the rules-based world order that provided some protection for international pdeace and security since it was put in place in 1945.
It is now unfit for its purpose declared in the UN Charter to stop the slaughter of war. The General Assembly is a talking shop, while all power resides in the permanently poleAxed Security Council which cannot function because of the big power veto.
Resolutions for peace in Ukraine are vetoed by Russia, for peace in Gaza they are vetoed by America on behalf of Israel, and any resolution to condemn the bombing of Iran will be vetoed by the US , presumably with the support of Australia.
Besides, the problem with Iran goes beyond nuclear weapons. It’s a conflict between the rights of its people and the wrongs of its dictatorship. That is a conflict that only its people can resolve, however much the West may wish to help.
Trump has already made a mockery of US law, from which his Supreme Court has declared him immune. Hewill now make a mockery of international law, roo.
Geoffrey Robertson KC is an expert in international and human rights law. He is the author of Mullahs Without Mercy and Crimes Against Humanity.
Why Trump’s Golden Dome must be opposed – Bruce Gagnon & Dae-Han Song
19 Jun 2025
In January 2025, Donald Trump signed an executive order directing the US armed forces to construct a missile defense system – the ‘Golden Dome’ – a proposed multi-layer defense system, comparable to the Iron Dome system in Israel. It aims to place and maintain space weapons orbit, for the first time in history.
The proposed system will be exorbitant. According to US Congress sources it could cost several trillion dollars. This would require the US to cut every one of its remaining social programs. Such a military system would inflict ever more damage to the environment both on and around our planet.
Trump wants such a system, so that the US can launch a nuclear attack on another nuclear armed country and the US be confident that it has sufficient defenses to reduce the impact of any retaliatory missiles launched against US to levels deemed acceptable to US military planners. As the US advances its war drive, it is developing its military alliances with other countries and locking them into its war preparations.
Military coordination is being stepped up with increased ‘interoperability’ of hardware. In these alliances, such as NATO, it is always the US that is ‘in charge of the tip of the spear’.
Bruce Gagnon, in discussion with Dae-Han Song, explains why the proposed Golden Dome should be opposed. Bruce Gagnon has been organizing to stop the new arms race in space (Star Wars) since 1982. He began by coordinating the Florida Coalition for Peace and Justice from 1983-1998. During those years, in 1992, he co-founded the Global Network Against Weapons & Nuclear Power in space that he now coordinates. Bruce began his organizing career working for the United Farm Workers Union. He is a Vietnam war era veteran. He lives in Brunswick, Maine.
Website of The Global Network Against Weapons & Nuclear Power in Space: https://space4peace.org/ The petition against the Golden Dome is here: https://space4peace.org/global-networ… Dae-Han Song is a part of the International Strategy Center and the Korea Policy Institute. He is a member of the international No Cold War collective.
1 This month
of the week – Disrupting War & Militarism in Oceania. Active solidarity. Radical practice.
Antinuclear 