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"What used to happen is we used to get quite frequent high bounces and really low bounces … and in those high bounces, the biodiversity would have taken off, and would have had enough to respond and wait for the next big boom period. Kingsford uses the analogy of a bouncing ball to describe the way the river would oscillate between dry and wet. "There's no doubt that this flood will be fantastic for future generations. The question is how much of a bounce has happened." "We have an obligation to make sure that our future generations have something to springboard off, and at this present moment they are not going to have that."
"That could be due to a range of reasons, local differences that have occurred since those last big floods in the 1970s, or just the challenges of measuring flow at those really big river heights." "It's almost like we don't have any dams at the moment because whatever water falls up in those catchments basically goes down the river." Downstream communities, wetlands and lakes endured prolonged suffering during the last drought. Although the future inflows in the Macquarie's allocations are based on the driest observed inflow levels, the NSW environment department's guide for water allocation states that the design carries a level of risk. Then in the 1990s the effects of a drier climate, combined with increased irrigation, began to hit, culminating in the last drought when the dam almost ran dry. "If we're serious about adapting to climate change, we need to move the environmental water holding further up the priority pyramid and we need to have a look at town water security for growing cities."
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These atoms decay, throwing off particles and energy over years or millennia until they become lighter and more stable. Nuclear fuel is radioactive, of course, but so is nuclear waste, and the only thing that can render such waste harmless is time. On the other hand, high-level waste – the byproduct of reprocessing – is so radioactive that its containers will give off heat for thousands of years. It, too, will become harmless over time, but the scale of that time is planetary, not human.
"As soon as you build the dam, or enlarge a dam, you have less water because you get evaporation. Out of Burrendong the evaporation is about 10 per cent of the water so immediately you get less water for a dam. "We can't be trying to squeeze every drop of water out of these rivers for developing and abstracting that water for irrigation." Rigney is also critical of how water is allocated in the Murray-Darling Basin. Grant Rigney is a Ngarrindjeri man and chair of Murray Lower Darling Rivers Indigenous Nations .
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Hinkley Point C, the first new nuclear plant in a generation, is being built in Somerset, but its cost has bloated to more than £25bn. Once you fill out the form, create an account on Remotasks using your Facebook account. Once in your account, you’ll be able to start taking courses in the Remotasks Training Center. Once you pass a course and are enabled to work on a project, you can start doing tasks and earning!
A government study concluded that radiation from Sellafield wasn’t to blame. Perhaps, the study suggested, the leukaemia had an undetected, infectious cause. Our vision is to accelerate the development of AI applications and we do this by providing high-quality training data to AI companies. We also do work in other areas such as image recognition, categorization, and transcription. But MPF vehicles are not exactly miniature versions of M1 Abrams main battle tanks, George said via email.
Dismantling Sellafield: the epic task of shutting down a nuclear site
They're the last to be allocated, and how much they receive each year depends on how much water is in the system, as well as what's predicted to arrive. At the height of the drought, the Burrendong Dam almost ran completely dry. Now after three consecutive wet years, locals say the marshes have transformed from a "moonscape" to a flourishing wetland.
M1 Abrams main battle tanks, which weigh 70 tons, are so heavy that they are usually sent to Europe, South Korea, and elsewhere by ship, and that takes about two weeks, not including the time to get the tanks on and off ships, Milley said. Milley talked to Task & Purpose at Saturday’s Army-Navy football game in Philadelphia about how the Army needs to have a vehicle that is light enough to be flown into combat zones to support infantry units. "We will go back into a dry period at some point and with water in the storages, things are very well placed to be able to manage through the first part of that dry cycle." "Communities are under a lot of pressure at the moment, there's going to be a period of recovery … but certainly with the volumes of water held in storage, there will be a couple of years with very strong allocations to entitlements. Adelaide water consultant Dr Erin Smith is more optimistic about how Australia is responding to the dramatic changes to water supply. "While you've got the same available water determination allocation policy, all that's going to happen is irrigation will have more water allocated to it because the town volumes are pretty well fixed.
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"The system at the moment is heavily weighted towards ensuring that the environment has its water allocated to it over a forecasted period." "They were caught out really badly this time because they allocated the water and it didn't turn up. The water that was meant to fall as rain and flow into Burrendong Dam still hadn't evaporated out of the Indian Ocean." "For those of us that have been here for a long period of time, your expectations are constantly reducing, because we see a small environmental flow come to the marshes." But it has also brought life to the water-starved Coorong, Lower Lakes and River Murray mouth. For six weeks, Sellafield’s engineers prepared for the task, rehearsing on a 3D model, ventilating the cell, setting up a stream of air to blow away the molten metal, ensuring that nothing caught fire from the laser’s sparks. The snake hasn’t been deployed since 2015, because other, more urgent tasks lie at hand.
I only ever saw a dummy of a spent fuel rod; the real thing would have been a metre long, weighed 10-12kg, and, when it emerged from a reactor, run to temperatures of 2,800C, half as hot as the surface of the sun. In a reactor, hundreds of rods of fresh uranium fuel slide into a pile of graphite blocks. Then a stream of neutrons, usually emitted by an even more radioactive metal such as californium, is directed into the pile. Those neutrons generate more neutrons out of uranium atoms, which generate still more neutrons out of other uranium atoms, and so on, the whole process begetting vast quantities of heat that can turn water into steam and drive turbines. Strauss was, like many others, held captive by one measure of time and unable to truly fathom another. The short-termism of policymaking neglected any plans that had to be made for the abominably lengthy, costly life of radioactive waste.
But the pursuit of commercial reprocessing turned Sellafield and a similar French site into “de facto waste dumps”, the journalist Stephanie Cooke found in her book In Mortal Hands. What looked like a smart line of business back in the 1950s has now turned out to be anything but. With every passing year, maintaining the world’s costliest rubbish dump becomes more and more commercially calamitous. From Helsinki, if you drive 250km west, then head another half-km down, you will come to a warren of tunnels called Onkalo. Other underground vaults have been built to store intermediate waste, but for briefer periods; one that opened in a salt cavern in New Mexico in 1999 will last merely 10,000 years.
If Onkalo begins operating on schedule, in 2025, it will be the world’s first GDF for spent fuel and high-level reactor waste – 6,500 tonnes of the stuff, all from Finnish nuclear stations. The species that is building it, Homo sapiens, has only been around for a third of that time. The Home page displays a summary of tasks assigned to you and their status, such as Open, Late, Due Today, or Due in 7 Days. A number to the left of the status indicates the number of tasks with that status.
In Sellafield, these nuclear divers will put on radiation-proof wetsuits and tidy up the pond floor, reaching the places where robotic arms cannot go. Not far from the silos, I met John Cassidy, who has helped manage one of Sellafield’s waste storage ponds for more than three decades – so long that a colleague called him “the Oracle”. Cassidy’s pond, which holds 14,000 cubic metres of water, resembles an extra-giant, extra-filthy lido planted in the middle of an industrial park. In the water, the skips full of used fuel rods were sometimes stacked three deep, and when one was placed in or pulled out, rods tended to tumble out on to the floor of the pond. Most of the atoms in our daily lives – the carbon in the wood of a desk, the oxygen in the air, the silicon in window glass – have stable nuclei. But in the atoms of some elements like uranium or plutonium, protons and neutrons are crammed into their nuclei in ways that make them unsteady – make them radioactive.
The number of radioactive atoms in the kind of iodine found in nuclear waste byproducts halves every 16m years. In comparison, consider how different the world looked a mere 7,000 years ago, when a determined pedestrian could set out from the Humber estuary, in northern England, and walk across to the Netherlands and then to Norway. Planning for the disposal of high-level waste has to take into account the drift of continents and the next ice age. We sweltered even before we put on heavy boots and overalls to visit the reprocessing plant, where, until the previous day, technicians had culled uranium and plutonium out of spent fuel. Every second, on each of the plant’s four floors, I heard a beep – a regular pulse, reminding everyone that nothing is amiss. “We’ve got folks here who joined at 18 and have been here more than 40 years, working only in this building,” said Lisa Dixon, an operations manager.
The invisibility of radiation and the opacity of governments make for a bad combination. Sellafield hasn’t suffered an accident of equivalent scale since the 1957 fire, but the niggling fear that some radioactivity is leaking out of the facility in some fashion has never entirely vanished. In 1983, a Sellafield pipeline discharged half a tonne of radioactive solvent into the sea. British Nuclear Fuels Limited, the government firm then running Sellafield, was fined £10,000. Around the same time, a documentary crew found higher incidences than expected of leukaemia among children in some surrounding areas.
