Synopsis: A puzzling disappearance of a radioactive device at a South Australian steelworks has left authorities perplexed. The instrument, roughly the size of a domestic gas cylinder, went missing three weeks ago at the Liberty OneSteel site. Despite a collaborative search involving various agencies, the device remains undiscovered. Thankfully, the low radioactivity levels in the 35-year-old instrument pose no risk to the public or workers.Article: In a baffling turn of events, a radioactive instrument has mysteriously vanished from a steel plant in South Australia, leaving authorities scratching their heads. The Environmental Protection Authority (EPA) was alerted to the situation three weeks ago when reports emerged about a missing industrial bin level gauge, a measuring instrument housing a small radiation source.Despite concerted efforts involving the Australian Radiation Protection and Nuclear Safety Agency, the police, firefighters, and steelworkers, the device, which is approximately the size of a household gas BBQ cylinder, remains elusive.The EPA reassured the public that there is no cause for alarm, as the 35-year-old instrument contains low levels of radioactivity and poses no threat to the community or workers.A spokesperson for the EPA elaborated, stating, "Based on its assessment of the incident and the fact that the radioactive material has decayed to 100th of its original activity, the EPA does not believe it poses a risk to workers or the public."The owners of the plant, GFG Alliance, explained that the material was relocated during maintenance activities, and there is no indication that it has left the site. The material, just a few millimeters in size, is stored in a 50-kilogram drum.Keith Baldry from the EPA suggested that it's likely the material was accidentally discarded, saying, "They're doing some decommissioning at the site, and it's been likely incorporated into some of their waste piles. On that basis, we don't think there's a risk."To address the mystery, a team of experts equipped with specialized detection tools is conducting extensive radiological searches to locate the missing item, according to a spokesperson from ARPANSA (the Australian Radiation Protection and Nuclear Safety Agency).The disappearance of such devices, although unusual, is not unheard of, as they occasionally go missing both domestically and internationally. Various factors, including theft of vehicles, can contribute to these occurrences.Similar gauges are commonly used in large industrial sites across Australia, with 87 premises in South Australia alone registered to hold sealed radiation sources.It's worth noting that this incident is reminiscent of a case in Western Australia when a radioactive mining capsule fell from a Rio Tinto truck, sparking a large-scale search. The capsule contained caesium-137, which could lead to radiation burns or sickness if mishandled. However, it was eventually located without causing harm.Conclusion: The enigmatic disappearance of a radioactive instrument from a South Australian steel plant has left authorities perplexed. Despite extensive searches and the involvement of various agencies, the device, roughly the size of a domestic gas cylinder, remains missing. Fortunately, the low levels of radioactivity it contains do not pose a threat to the public or workers. This incident serves as a reminder of the need for strict control and monitoring of radioactive materials in industrial settings.