I'm gonna go out on a limb and assume that you won't intend to ever flying on the Boeing 787 Dreamliner, considering that they even had several issues that made it *past* testing? I seem to recall Airbus also having some issues. Furthermore I'm guessing you won't use any Apple, Dell, Sony, or Lenovo -- those are the ones I remember, I bet there are more -- laptops either. Their exploding batteries made it past testing.
All projects have issues. That's why you have reviews, testing, redesign, more reviews, more testing, and for anything that needs high reliability, lots and lots of fail-safes. For some products, where liability is low, companies don't care too much about this. Not so here though. The test process worked properly; the fact that the valves either weren't according to spec, or that the spec wasn't resilient enough, was identified. The problem will be fixed, things will be reviewed and tested again, against the new spec or component.
A nuclear power plant that gets delayed because of safety-related improvements feels a lot better than one that's finished on time. In one case you know that they at least took the safety issues seriously. In the other case you're left wondering whether everything was perfect to begin with, or if they just ignored possible issues.