HOW!
The shrimp should be returned to the producer.
If these shrimp were found on the grounds of a nuclear power plant, the shrimp would be required to be disposed of as radioactive waste.
The only likely origin of the Cs-137 is a nuclear power plant or a Uranium mine.
There needs to be an investigation in to how Cs-137 came to be in farmed shrimp.
,”If these shrimp were found on the grounds of a nuclear power plant, the shrimp would be required to be disposed of as radioactive waste.”
That can’t be determined without knowing contamination levels.