Pumping liquid rad waste to ocean vs land

[Homer Simpson]

something that is going on that seems odd to me is the pumping of the radioactive liquid waste direct to ocean. I am sure there must be a significant amount of long lived/insoluble/particle type rad waste in there? Is there not a good chance these hot particles could get caught up in ocean currents and land themselves on shorelines anywhere? Dilution seems insufficiant if I've got a hot particle giving off several REM in my polka dot thong speedo?

In comparison to the NRX accident of 1952, here they had a large amount of similar waste to get rid of, so they pumped it to a sandy area a mile away and allowed the ground to filter out the insoluble radiation. Seems a way better plan for sure, as now the rad waste is localized and controllable.

It must just be due to a lack of time/resources that the Japan responders have opted to just pump straight to ocean?

 

[jakekazoo]

something that is going on that seems odd to me is the pumping of the radioactive liquid waste direct to ocean. I am sure there must be a significant amount of long lived/insoluble/particle type rad waste in there? Is there not a good chance these hot particles could get caught up in ocean currents and land themselves on shorelines anywhere? Dilution seems insufficiant if I've got a hot particle giving off several REM in my polka dot thong speedo?

In comparison to the NRX accident of 1952, here they had a large amount of similar waste to get rid of, so they pumped it to a sandy area a mile away and allowed the ground to filter out the insoluble radiation. Seems a way better plan for sure, as now the rad waste is localized and controllable.

It must just be due to a lack of time/resources that the Japan responders have opted to just pump straight to ocean?

yes it's a very bad idea. and i don't think there is a better plan, if for no other reason because it is highly radioactive. i think that TEPCO has run out of viable options at this point, putting the toxic waste in the ground would ruin the water table underneath the island.

 

[clancy688]

something that is going on that seems odd to me is the pumping of the radioactive liquid waste direct to ocean. I am sure there must be a significant amount of long lived/insoluble/particle type rad waste in there?

As far as I know they are only pumping water with an activity of up to 20 Bq / cm³ directly into the ocean.

For 10.000 tons, that would not even be 1 TBq... it's nothing compared to the highly radioactive water which flows over cracks and leaks into the ocean.

If I remember correctly, there's water in reactor 2 with an activity of over 1 billion Bq / cm³. 1000 cm³ of that water (or 1 litre!) would be more dangerous than those 10.000 tons they are pumping right now.

 

[Bob S]

As far as I know they are only pumping water with an activity of up to 20 Bq / cm³ directly into the ocean. .

I think they have been [STRIKE]pumping[/STRIKE] leaking water with an activity of up to 20 MBq / cm³ (=20,000,000,000,000 Bq/m³) directly into the ocean. See

https://www.physicsforums.com/showthread.php?t=480200&page=78

Bob S

 

[Homer Simpson]

It just seems so sloppy from a contam control point of view, as expected for the conditions I guess.

Using the ocean to dilute soluble emissions is very accepted. So long as they are careful the ocean doesn't act as 'sheilding' to some really hot stuff to go undetected, until it washes up somewhere.

Surely in the Bq per liter (etc) allowable limits that countries have in place, they must differentiate between soluble and insoluble material?? Otherwise couldn't you just go chuck a used fuel bundle in the center of the ocean and call it adequately diluted?

 

[clancy688]

I think they have been [STRIKE]pumping[/STRIKE] leaking water with an activity of up to 20 MBq / cm³ (=20,000,000,000,000 Bq/m³) directly into the ocean.

Yeah... 100 litres of that stuff do more damage than those 10.000 tons (10.000.000 litres) they are planning to pump out.

Basically, they can pump as much low level waste water in the ocean as they want - it's nothing compared to the highly radioactive stuff which's leaking uncontrolled.


A few decades ago, the oceans were frequently used for low-level nuclear waste disposal.


Of course, every radioactivity release to the sea is not a good thing. And should be avoided as hell. But in the moment, there's already so much radioactivity in the water that a little more or less won't change the damage which's already been done.