In the case of the yellowcake, documents released under the Official Information Act show that there is a great deal of confusion surrounding the contingency plans if something goes wrong. While the shipments have been authorised by the Environmental Risk Management Authority, they transhipped between 1996 and 2009 without any approvals from the authority.
The safety procedures appear sketchy at best regarding who is responsible and what is to be done in the event of a radioactive spill.
Western Bay of Plenty Harbour Master Jennifer Roberts stated in a 2010 submission to Government that neither the Tauranga Fire Service, nor Port of Tauranga staff, had the equipment and training to detect and deal with a uranium yellowcake spill.
While the uranium yellowcake in question is relatively benign it does pose a health risk if consumed - a possibility if it were to leak into the ocean from one of the containers as we saw with the ferrosilicon off the Rena.
This will then go on to affect the sea life that local fishermen make a living out of and then sell on for us to eat, or else it drifts onto the beaches along with the tonnes of oil that's been having such a drastic impact on locals and wildlife.
The Rena spill has highlighted the importance of proper safety precautions, adequate training and quick response that are required if accidents are to avoid becoming disasters.
A lapse in maintaining safety standards may seem like a small, forgivable act, but the reality is that we are never prepared for the big accidents until they happen, and when they do happen, they cost our country, our reputation, our economy and our environment.
We can introduce better regulation for coastal shipping that supports the use of local crews and ships that know New Zealand waters and hazards to minimise risks. Furthermore, we can invest in our emergency maritime services so that they have the capacity and resources to respond quickly if accidents do happen.
We should stop allowing our ports to be used to ship yellowcake but failing that then we owe it at least to the people of New Zealand to be certain that we know exactly what to do and who to call in the event of an emergency.
The Rena can be the catalyst to reviewing this controversial practice and our response plans if accidents do happen.
* Gareth Hughes is a Green Party MP and Oceans spokesman