AN Aussie dad sparked a nuclear alert after he took a radioactive pee in his backyard.

The unnamed man had discharged himself from hospital having received radiotherapy for cancer.

1 A man in Australia sparked a radiation alert after taking a pee in his backyard after having radiotherapy Credit: Getty - Contributor

After getting home he took a stroll out to his back garden where he promptly relieved himself before wandering back inside.

It is not known why he did not opt to use a toilet.

But unwittingly he had contaminated his yard with radiation and put his family at risk.

Authorities were forced to dig up the turf and soil in an attempt to decontaminate the area, eventually clearing 95 per cent of the radiation.

A report by the Australian Radiation Protection and Nuclear Safety Agency (ARPANSA) detailing the 2017 incident, partly blamed the man’s failure to obey the instructions of hospital staff.

PEE-CAUTIONS What you are supposed to do with your urine after radiotherapy RADIOTHERAPY involves injecting radioactive substances into the bloodstream to kill cancer cells. Normally when patients are injected with radioactivity for nuclear medicine procedures they wee away most of the radioactivity before leaving the hospital. However patients still need to take precautions for the first few days after treatment while the radiation weakens. Usual precautions include: Flush the toilet twice after each use, and wash your hands well after using the toilet.

Use separate utensils and towels (laundry may need to be washed separately).

Drink extra fluids to flush the radioactive material out of your body.

No kissing or sexual contact (often for at least a week).

Keep a distance of one arm’s length between yourself and any others who spend more than 2 hours next to you in any 24-hour period. (You may need to sleep alone for a week or so.)

Limit your contact with infants, children, and women who are pregnant.

Limit your contact with pets.

The new report details more than 500 radiation-related incidents that occurred throughout the course of 2017, the Sydney Morning Herald reports.

It stated: "A patient was permitted to self-discharge from hospital following administration of 3.5 GBq Iodine-131 (I-131).

“The patient did not follow the instructions provided and contaminated a residence, which resulted in exposure to the patient's family.

"The contamination was primarily of the rear yard where the patient urinated outside.

Communication issues with the patient were identified as a factor in this incident."

The report further concluded that radiation use in Australia "is generally very safe" but unexpected events can occur "even with strict controls in place".

Hundreds of other nuclear nuisances in the report included one incident in which a worker spilled a vial of irradiated solution while trying to remove its cap—contaminating his hands and causing “tissue reactions”, despite the fact that he was wearing two pairs of gloves.

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Another mishap detailed involved a radioactive vial which shattered in a microwave.

The report has been released as the state government in Queensland debate whether or not Australia should consider using nuclear technology to produce electricity.

The Land Down Under banned nuclear power in 1998 and has never had a commercial reactor despite having 33 per cent of the planet’s uranium deposits.