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How to find a tiny radioactive source while doing 70 kph

ansto.gov.au

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Re: How to find a tiny radioactive source while doing 70 kph

#41
post #2

Back story: Rio Tinto apologises for losing radioactive capsule in Australia https://www.bbc.com/news/business-64448879

private company fucks up and government cleans up the mess :)

What's the other option? Let the company search for it? You'd be complaining that the government wasn't involved enough if that's what they did.

The company offered to pay for the search before the search was even concluded. Not sure what more you can ask for.

Re: How to find a tiny radioactive source while doing 70 kph

#43
post #37

Earlier quoted context omitted.

I guess that was because they were afraid of it getting stuck in a tire. If I found a strange metal cylinder in my tires, I would probably pick it up a try to find out what it is.

Did they close the road and/or put a checkpoint in place? That'd eliminate that risk.

The road you're talking about was 1400km long

Re: How to find a tiny radioactive source while doing 70 kph

#44
post #3

Good job, but a lot of the reports really exaggerate the size of the search area. > in the formidable conditions of the outback... > It’s fair to say finding a piece of equipment the size of a button in a vast desert was no easy task Let's not go too far here. It was two metres from the road and they knew exactly which 1400km of roads to check.

Really I have no idea why this entire story has been made out to be such a big deal. Feels like deliberate distraction mass media usually does.

Re: How to find a tiny radioactive source while doing 70 kph

#45
In the US, the NNSA has helicopters with very sensitive radioactivity detectors. I live in DC and they‘ve flown straight rows over the city, back and forth, to create a background map of natural radiation. It’s not too surprising AU was able to find their missing capsule.

Re: How to find a tiny radioactive source while doing 70 kph

#46
post #3

Good job, but a lot of the reports really exaggerate the size of the search area. > in the formidable conditions of the outback... > It’s fair to say finding a piece of equipment the size of a button in a vast desert was no easy task Let's not go too far here. It was two metres from the road and they knew exactly which 1400km of roads to check.

That still a massive search area for a very tiny object.

It's the distance between Austin TX and Los Angeles, CA. And they didn't know it was within 2m of the road- it might have bounced much further, or been hit by another vehicle and sent further. It might have been picked up by another vehicle, stuck in the tire perhaps.

Previous incidents like this have lead to deaths.

Let them celebrate.

Re: How to find a tiny radioactive source while doing 70 kph

#47

Earlier quoted context omitted.

Did they close the road and/or put a checkpoint in place? That'd eliminate that risk.

The road you're talking about was 1400km long

1400km / (70km/h) = 20 hours of driving. This was no "a thousand volunteers on foot spent days searching for even a scrap of evidence" effort.

Re: How to find a tiny radioactive source while doing 70 kph

#48
post #4

Earlier quoted context omitted.

I was rather baffled by so many sources claiming that this would be super difficult to find. It seemed like such a simple task to drive up and down roads with some radiation detection equipment, log the data and investigate any hotspots. Well, I guess it was? Or maybe I'm severely underestimating the complexity of this?

The news was a bit of a beat-up and the chances of just accidentally stumbling on it out there were pretty remote to essentially nil. But what's authority to do? If some kid had found it and took it to school there'd be hell to play. Based of its stated radiation signature it was always going to be easy to find. Right, it was a simple but nuisance task and took about as long as expected.

> hell to play.

not sure if this was a typo, but the phrase I'm familiar with is "hell to pay".

https://dictionary.cambridge.org/us/dictionary/english/there...

Re: How to find a tiny radioactive source while doing 70 kph

#49
post #12

Earlier quoted context omitted.

In some other thread I believe someone said with his known equipment, even if not occluded, a scan would take some seconds... so with that wouldn't have been to be that easy? So now not sure if normal.or amazing that they can do this with a 70km/h drive by?! ( Edit: https://news.ycombinator.com/item?id=34623782 sounds like not too amazing :) )

It's not too amazing. Perth has a few companies that do this work for a living - as a grind job, flying contracts for an actuall million line kilometres of 256 channel radiometric mapping at anything from $7 to $15 AU per line kilometre for mineral exploration. This has been ongoing for 50 years (see: Radiometric Map of Australia) and I'm slighlty baffled why a plane wasn't flown along the road on day one. Realistic…

Your guess about the airframes being booked has a ring of truth to it. I hadn't thought of that, and was wondering why radiometrics wasn't being used from the beginning.
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