Design flaws in Flamanville EPR nuclear reactor vessel, and attempts to solve this

The EPR reactor vessel is not designed like the previous vessels, and the
water does not follow the flow movements observed on conventional reactors.
EDF engineers therefore had a piece of metal (deflector) installed in each
tank bottom to redirect the water correctly. But that would be
insufficient.

What solutions? The most logical solution would therefore be
to change this deflector “with the key to a work of development as
complex as ruinous, notes the weekly. And no one is sure, given the limited
space available in an EPR tank, that this repair is technically
possible”.

The other solution envisaged would therefore be to “reinforce
the fuel assemblies, reinforce the protective grids so that the blades
resist the flows”, mentioned Julien Collet.

EDF will present its plan to us
in February, so we can see if their proposals can solve the problem.
Another possibility mentioned at the end of the article: “To limit the
pressures of the water, it would be a question of running the EPR at only
60% of its power, Flamanville would then go from a capacity of 1,650
megawatts less than 1,000 and would end up, for a record bill of 13 billion
euros, less efficient than the reactors built 50 years ago.”

 La Presse de la Manche 20th Jan 2022

https://actu.fr/normandie/flamanville_50184/nucleaire-la-cuve-de-l-epr-de-flamanville-est-elle-mal-concue_48067014.html

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