You can google radioactive waste filter and come up with stuff.

Here is a ceramic one
http://ceramics.org/ceramictechtoday/materials-innovations/quts-zhu-has-ceramic-filter-for-radioactive-waste/

Do you want to put bets on whether IIC (stands for Idiots In Charge) have even contacted him/her or anyone?

Someone on somewhere suggested hemp can filter. There are other filters possible it seems. This is good news. Oh goodness, we will have to go through our regular purchasing department and they are backed up. mg