If the contract to build the plant is let correctly, then it can be made to be safe. When something is outsourced and it does not work, most of the time the person letting the contract has done a shit job.
well we germans do not have a good track of making buildings correctly and safe in the recent past.
it either took twice as long and was twice as expensive or it was a complete mess. and this was with things that needs to be less safe than a nuclear power plant.
germany lost a lot of knowledge in the construction space thats why I highly doubt that we can make a safe nuclear power plant that might produce less garbadge. also corporate entities grown in power in germany and they try to safe as much money as possible.