The other thing we did was include it in our scope and terms of reference. We put it into the "chemical" hazards section that we would consider it if relevant. I have always had a fixed agenda for HACCP meetings as well and we include "new hazards" as a question and have examples for each chemical, biological and physical. I think I also included for example radiological in chemical so we could at least show that the question was asked and answered in the negative.
But I agree with the above. The caesium 137 case is an easy "gotcha" for anyone importing anything from Indonesia (or potentially you may have a sub ingredient such as spices imported from there). As it was linked to the containers, the spread of ingredients potentially impacted could be huge. I'd expect that to be minuted with an action for checking all ingredients and sub ingredients are not impacted and any potential ingredients from that country (albeit it's huge) are asked questions about whether there is a risk, e.g. for spice and prawn suppliers. Also thinking about any other risk in supply chain you can think of.
Still think it's weird it was caught and how caesium 137 is associated with nuclear waste but that's another topic.
Sorry, just can't call them shrimp. Shrimp in the UK are tiny wee things. Like less than a cm. Often served "potted".