Antinuclear

Plutonium blown up at Maralinga, in secret “Vixen B” tests

Dig for secrets: the lesson of Maralinga’s Vixen B The Conversation,   Liz Tynan, 26 July 13 “……….The tests of far greater consequence were the 12 Vixen B tests, only held at Maralinga  These experiments used TNT to blow up simulated nuclear warheads containing a long-lasting form of plutonium.

Vixen B scattered 22.2kg of plutonium-239 around the Maralinga test site known as Taranaki. This form of plutonium has a half-life of over 24,000 years. The extreme persistence of radiation and the threat of cancer posed by inhaling small particles in dust at the site make it especially dangerous.

The Vixen B tests took place amid total secrecy in 1960, 1961 and 1963. Maralinga’s toxic legacy can be summed up in one word: plutonium. When the Maralinga Rehabilitation Technical Advisory Committee (MARTAC) reported in 2002 on efforts to remove contamination from the area it said “Plutonium … was almost entirely the contaminant that determined the scope of the [Maralinga rehabilitation] program.”

The British carried out some clean-up operations after Vixen B and provided a report (by British physicist Noah Pearce) in 1968 that made claims about the level of plutonium contamination at the site. The Pearce report provided the technical basis for the Australian Government to release the UK from any further liability for the Maralinga site.

The technical advisory committee later confirmed that the plutonium contamination at Taranaki was wrong by a factor of 10: “A comparison between the levels reported by the UK at the time (Pearce 1968) and the field results reported by the Australian Radiation Laboratory…(Lokan 1985) demonstrates an underestimate of the plutonium contamination by about an order of magnitude.”……..” http://theconversation.com/dig-for-secrets-the-lesson-of-maralingas-vixen-b-15456

July 26, 2013 - Posted by Christina Macpherson | history, secrets and lies, South Australia, weapons and war