How did a radioactive capsule go missing in Australia and how dangerous is it?
Australian authorities are mounting an extensive search for a tiny radioactive capsule believed to have fallen out of a road train - a truck with multiple trailers - that travelled 1,400 km in Western Australia. Here's what you need to know:
WHAT IS IT?
The silver capsule is just 6 mm in diameter and 8 mm long and was part of a gauge used to measure the density of iron ore feed at Rio Tinto's RIO.AX remote Gudai-Darri mine.
HOW DID IT GO MISSING?
The gauge, packaged by a specialist contractor, was picked up from the mine on Jan. 12, by a separate logistics company. When it was unpacked on Jan. 25, it was found broken apart, with one of its four mounting bolts as well as screws and the capsule missing.
Authorities suspect vibrations from the road train caused the gauge to break apart and the capsule fell out.
HOW DANGEROUS IS THE CAPSULE?
Filled with Caesium-137, it emits radiation equal to 10 X-rays an hour. Authorities have issued a radiation alert for large parts of Western Australia and if it is spotted, recommend that people stay at least five metres (16.5 feet) away as exposure could cause radiation burns or sickness.
But just driving past it is believed to be of relatively low risk.
WHAT DOES THE SEARCH INVOLVE?
The road train travelled from the mine in the state's remote Kimberley region and arrived at a storage facility in the suburbs of Perth on Jan. 16.
Search crews are traveling north and south along the state's Great Northern Highway as well as other sections of the road train's journey with specialized radiation detection equipment. The Department of Fire and Emergency Services said on Monday it will take five days to cover the road train's route. It said on Tuesday that more than 660 km had been searched so far.
The search involves at least five other government agencies including the Department of Defence, the police, the Australian Nuclear and Science Technology Organisation and the Australian Radiation Protection and Nuclear Safety Agency.
(Reporting by Melanie Burton and Lewis Jackson; Editing by Edwina Gibbs)
CTVNews.ca Top Stories
Quebec police officer stabbed and killed during arrest, second wounded
A Quebec provincial police officer was fatally stabbed Monday night while carrying out an arrest in the town of Louiseville, west of Trois-Rivieres, Que. The Surete du Quebec has confirmed the identity of the officer, Sgt. Maureen Breau, who had been on the force for over 20 years.

Liberals to go after predatory lending in today's budget, invest in dental care plan
Finance Minister Chrystia Freeland is set to table a federal budget in the House of Commons on Tuesday afternoon, which a federal source says will include plans to go after predatory lending and more details on dental care as part of a pitch to make life more affordable.
Walmart Canada CEO says retailer not trying to profit from inflation
Walmart Canada is not trying to profit from food inflation, president and CEO Gonzalo Gebara told a parliamentary committee studying the issue Monday evening.
Victims identified as police reveal Nashville school shooter had drawn maps, done surveillance
The suspect in a Nashville school shooting on Monday had drawn a detailed map of the school, including potential entry points, and conducted surveillance before killing three students and three adults in the latest in a series of mass shootings in a country growing increasingly unnerved by bloodshed in schools.
Indigenous concert in Vancouver cancelled over questions about performer's identity claims
The Vancouver Park Board and Britannia Community Services Centre cancelled an event Sunday that had been advertised as part of an Indigenous concert series in Grandview Park.
How many COVID-19 vaccine doses should you have by now?
Here is a summary of the current COVID-19 vaccination guidelines from NACI, for both children and adults who are at increased risk of serious illness and those who are not.
From silicon to brain cells: How biology may hold the future of computers
As artificial intelligence software and advanced computers revolutionize modern technology, some researchers see a future where computer programmers leap from silicon to organic molecules.
5 things to know for Tuesday, March 28, 2023
A warning for consumers to expect to pay more next month for three key items, a reminder about COVID-19 booster shots, and police reveal what they know about a deadly shooting at a Nashville school. Here's what you need to know to start your day.
Hockey Canada says 2018 junior players ineligible for international competition
Hockey Canada says players from the 2018 world junior hockey team will not be considered for international competition until an investigation into an alleged sexual assault involving members of the team is complete.