{"id":3816,"date":"2026-10-15T01:25:14","date_gmt":"2026-10-15T00:25:14","guid":{"rendered":"https:\/\/www.farmersforum.ie\/trends\/maralinga-aboriginal-families-reclaim-their-desert-10-years-before-cleanup-where-plutonium-persists\/"},"modified":"2026-10-15T01:25:17","modified_gmt":"2026-10-15T00:25:17","slug":"maralinga-aboriginal-families-reclaim-their-desert-10-years-before-cleanup-where-plutonium-persists","status":"publish","type":"post","link":"https:\/\/www.farmersforum.ie\/trends\/maralinga-aboriginal-families-reclaim-their-desert-10-years-before-cleanup-where-plutonium-persists\/","title":{"rendered":"Maralinga: Aboriginal Families Reclaim Their Desert 10 Years Before Cleanup, Where Plutonium Persists"},"content":{"rendered":"

In 1985, Aboriginal families returned to live on their lands at Maralinga in South Australia. Yet the major cleanup of the British nuclear tests did not begin until a decade later. A 2021 study clarifies what the soil still retains, while restrictions persist.<\/p>\n

<\/figure>\n

Seven atomic explosions at Maralinga in 1956 and 1957, but the minor trials pollute the site far more<\/h2>\n

Between September 27, 1956 and October 9, 1957, Great Britain detonated seven nuclear devices<\/strong> at Maralinga. The Buffalo operation included four detonations, followed by three more in the Antler operation. Their yields ranged from 1 to 27 kilotons, but they are not responsible for the bulk of the contamination.<\/p>\n

Lire aussi<\/span> \u00c0 14 ans, elle creuse une mare pour l\u2019\u00e9cole et neuf ans plus tard, son jardin abrite un \u00e9cosyst\u00e8me n\u00e9 sans animaux introduits<\/span><\/section>\n

The minor trials<\/strong>, conducted up to 1963, are the main cause. These tests involved no nuclear explosions, only conventional explosive charges. They indeed dispersed plutonium over smaller areas, but at higher concentrations.<\/p>\n

On the sole site at Taranaki, the Vixen B trials dispersed about 22 kilograms of plutonium-239<\/strong>. This isotope has a half-life of roughly 24,100 years. Thus, its radioactivity would diminish by half only after this very long period.<\/p>\n

Anangu families relocate to Oak Valley in 1985, ten years before the grand cleanup of the test site<\/h2>\n

In January 1985, a full ownership title returns to the Aboriginal people of Maralinga Tjarutja. The Maralinga Tjarutja Land Rights Act<\/em> of 1984 governs this transfer. Then, in March, Anangu families move to , located 128 kilometers from the village of Maralinga.<\/p>\n

Lire aussi<\/span> En Camargue, un violent orage a fait perdre 250 tonnes de fleur de sel aux producteurs d\u2019Aigues-Mortes<\/span><\/section>\n

But the McClelland Royal Commission found in 1985 that significant radiological risks remained, especially at Taranaki. The grand nettoyage<\/strong> does not begin until 1995 and lasts until 2000. The teams then bury the most contaminated soil and debris in trenches.<\/p>\n

In 2021, a Monash team analyzes six radioactive particles that could slowly release plutonium<\/h2>\n

In 2021, however, a team from Monash University revisits the matter in Scientific Reports<\/em>. Megan Cook leads this work on six radioactive grains of a few hundred micrometers. They analyze these grains with a British synchrotron and an ion beam.<\/p>\n

These grains, called hot particles<\/strong>, form from the cooling of droplets of molten metal in the explosion plume. Their structure turns out to be more complex than expected. According to co-author Vanessa Wong, these results profoundly alter the understanding of grains among the best-studied in the world.<\/p>\n

Lire aussi<\/span> \u00c0 Florence, une \u00e9tude men\u00e9e sur 283 platanes r\u00e9v\u00e8le un effet inattendu de l\u2019\u00e9clairage des rues<\/span><\/section>\n

The authors deem a possible slow release of plutonium<\/strong>, via several chemical and physical processes. This phenomenon probably contributes to the uptake of this metal by the fauna of Maralinga<\/strong>. However, in the six grains studied, plutonium remains largely trapped, while uranium moves more readily.<\/p>\n

Around Taranaki, permanent occupation remains limited, as no cleanup removes all contamination<\/h2>\n

ARPANSA, Australia\u2019s radioprotection agency, estimates that most of the contaminated zones meet the open-use standards<\/strong>. Hunting, mining, and construction remain possible, according to the agency. Yet precautionary restrictions limit permanent occupancy<\/strong> around Taranaki and deter any intrusion into the trenches.<\/p>\n

In November 2009, an agreement returns the site and the village of Maralinga to the traditional owners. Megan Cook regards Maralinga as among the best-monitored sites<\/strong> of its kind. She concedes, however, that one never recovers all the contamination, because \u201cit simply isn\u2019t possible.\u201d<\/p>\n

Lire aussi<\/span> En France, l\u2019arrachage massif des haies a profond\u00e9ment chang\u00e9 la fa\u00e7on dont la pluie p\u00e9n\u00e8tre les sols<\/span><\/section>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":3817,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[2518,2521,2216,2519,2517,964,2522,2520,447],"class_list":["post-3816","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-aboriginal","tag-cleanup","tag-desert","tag-families","tag-maralinga","tag-persists","tag-plutonium","tag-reclaim","tag-years","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"_links":{"self":[{"href":"https:\/\/www.farmersforum.ie\/trends\/wp-json\/wp\/v2\/posts\/3816","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.farmersforum.ie\/trends\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.farmersforum.ie\/trends\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.farmersforum.ie\/trends\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.farmersforum.ie\/trends\/wp-json\/wp\/v2\/comments?post=3816"}],"version-history":[{"count":1,"href":"https:\/\/www.farmersforum.ie\/trends\/wp-json\/wp\/v2\/posts\/3816\/revisions"}],"predecessor-version":[{"id":3818,"href":"https:\/\/www.farmersforum.ie\/trends\/wp-json\/wp\/v2\/posts\/3816\/revisions\/3818"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.farmersforum.ie\/trends\/wp-json\/wp\/v2\/media\/3817"}],"wp:attachment":[{"href":"https:\/\/www.farmersforum.ie\/trends\/wp-json\/wp\/v2\/media?parent=3816"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.farmersforum.ie\/trends\/wp-json\/wp\/v2\/categories?post=3816"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.farmersforum.ie\/trends\/wp-json\/wp\/v2\/tags?post=3816"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}