Framatome launches additional studies on some local stress-relieving heat treatments carried out on primary equipment

September 10, 2019 | 1 min |

In the context of new industrial developments at its Saint-Marcel site, this summer, Framatome detected non-compliant temperature ranges in some local stress-relieving heat treatments carried out on steam generators and pressurizers seals. A specific stress-relieving heat treatment process is concerned: it is a particular method using muffles with electrical resistances.

Work conducted by a team of experts has made it possible to characterize the causes more precisely whilst gathering the data to establish that the integrity of the components is not questioned. Studies are continuing to finalize the analysis.

The non-respect of temperature ranges constitutes a deviation from the technical manufacturing standards. This deviation has been reported to the concerned nuclear operators.

As stipulated in Framatome procedures, this specific stress-relieving heat treatment process using muffles with electrical resistances is not being used while the investigations are being completed. Other production activities carry on as normal at the Saint-Marcel site.


About Framatome

Framatome is an international leader in nuclear energy recognized for its innovative solutions and value added technologies for the global nuclear fleet. With worldwide expertise and a proven track record for reliability and performance, the company designs, services and installs components, fuel, and instrumentation and control systems for nuclear power plants. Its more than 14,000 employees work every day to help Framatome’s customers supply ever cleaner, safer and more economical low-carbon energy.

Framatome is owned by the EDF Group (75.5%), Mitsubishi Heavy Industries (MHI – 19.5%) and Assystem (5%).