France’s nuclear regulator ASN (Autorité de Sûreté Nucléaire) has asked Areva NC to increase its oversight of evaporators at the La Hague nuclear fuel processing facility in northern France after greater levels of corrosion than expected were discovered earlier this year. In February 2016, ASN asked Areva NC to increase its supervision of the units and install isolation facilities and advanced detection systems to limit the consequences of a leak or rupture. ASN has now imposed a number of additional measures, including asking Areva NC to define the criteria that would necessitate permanent shutdown of the evaporators, such as the minimum thickness of their walls. ASN said Areva NC must strengthen controls and checks on the thickness of the evaporator walls. There should be increased monitoring of maintenance shutdowns and plans must be prepared to deal with any emergency resulting from the development of a hole in an evaporator. Results of all tests must be compiled in reports to be sent to ASN twice a year, ASN said.
Nucnet 7th July 2016 read more »