Tag Archives: radiation

Nuclear Power: A Solution to the Australian Energy Crisis or a Risky Gamble?

Australia is currently in the midst of an energy crisis. Electricity prices have risen significantly as coal-fired power plants around the country are shutting down, lowering electricity supply in a time where demand is skyrocketing.

As Australia is exploring new ways to generate clean and efficient electricity, one possible, yet controversial alternative have been proposed: nuclear power.

Nuclear power generates electricity by splitting radioactive isotopes, such as uranium-238, in a process called nuclear fission. The heat produced from this process is then used to heat water, which turns into steam and spins turbines to generates electricity.

Nuclear power plant. Source

Proponents of nuclear power argue that nuclear power is a clean and efficient energy source. Unlike fossil fuels, nuclear power generates little to no greenhouse gases. This makes nuclear energy a viable option for combating climate change and can help lower carbon emissions in Australia, allowing the country to meet its emission goals.

Another advantage of nuclear power is its reliability. Nuclear power plants are reliable because they can provide a consistent and reliable source of electricity as nuclear power plants require less maintenance and are designed to operate for long periods before refueling. This is in contrast to renewable energy sources such as wind or solar, which are less reliable as they are dependent on fuel availability (wind and sunlight) and require large-scale storage.

Despite the benefits of nuclear power, there are opponents who raise concerns about its safety. One reason behind this opposition is the potential for accidents. Nuclear meltdowns such as Chernobyl and Fukushima Daiichi have resulted in radioactive leaks and serious health risks for people living nearby. In fact, the areas surrounding these accidents sites have been left uninhabitable for the foreseeable future.

Damage to the Fukushima Nuclear Power Plant following the 2011 earthquake and tsunami. Source.

Another risk associated with nuclear power is the issue of nuclear waste. Nuclear power plants generate radioactive waste that can remain hazardous for thousands of years.

Radioactive waste generated from nuclear power plants poses a risk of environmental contamination, causing harm to people, animals, and the ecosystem. This waste needs to be carefully stored and disposed of to prevent contaminating the environment.

The debate over nuclear power is likely to continue for many years to come. While there are certainly benefits to nuclear power, it is also clear that there are associated risks. As Australia faces the current energy crisis, it should consider nuclear power as a viable option for generating electricity to overcome this crisis.

~ Raymond Tang

Missing Capsule of Cesium-137 Sparks Manhunt in Western Australia

Authorities in Western Australia have quite literally found a radioactive needle in a haystack.

Carrying case for radioactive capsules. Source.

On January 12th, a tiny capsule of radioactive cesium-137 from a radiation gauge fell off a transport truck that was on its way from a Rio Tinto mine site to a storage facility in Perth, Western Australia, along a 1400 km stretch of highway in the rural Australian outback.

Due to the radioactive nature of cesium-137, Australia’s Department of Fire and Emergency Services, as well as nuclear scientists quickly launched a desperate search for the tiny capsule, about 8 mm in length. As the search intensified, the public was warned to say at least 5 meters from the radioactive capsule.

Figure 1: The bar chart compares the size of cesium-137 to the size of commonly used Australian coins.

Cesium-137 is a radioactive isotope that is formed from the nuclear fission of uranium-235. Although it is tiny, cesium-137 is very dangerous to the health and wellbeing of anyone who come in contact with it. The radioactive isotope can emit both beta and gamma rays, which can penetrate skin, causing severe radiation burns, sickness, or even death.

Capsule of cesium-137. Source.

With a half-life of about 30.05 years before decaying to barium-137m, a stable and non-radioactive isotope. However, “the cesium inside the capsule will [still] be dangerous [until] the next century.” That is according to Edward Obbard, a nuclear materials engineer with the University of New South Wales.

Miraculously, on February 1st, the radioactive capsule of cesium-137 was found just off the side of the highway around 200 km from the mining site. Authorities quickly cordoned off a 20 meter perimeter and safely contained the capsule inside a lead container.

It is important for companies to be extremely careful when transporting radioactive substances. This incident highlights the need to scrutinize the transport of radioactive substances so that a similar incident will not happen again in the future.

Raymond Tang