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Framatome continues investigations of stress relieving heat treatment processes

August 3, 2020 | 1 min |
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As part of its investigations into local stress-relieving heat treatments (SRHT), Framatome is studying the temperatures applied to welded joints on pipework connected to the steam generators during on-site replacement operations. The calculation and test-based verification program requires additional substantiation work to be conducted, in particular with regard to the RCC-M technical reference framework*. Framatome is keeping the operator EDF informed. The analyses carried out at this stage confirm that the mechanical integrity of the parts concerned is not impaired.

*This RCC-M framework or code corresponds to a set of French design and construction rules for the mechanical components of PWR nuclear Islands. It applies primarily to mechanical equipment that is safety classified and subjected to pressure. It also applies to certain non-pressurized components such as RPV internals, supporting elements for classified components, storage tanks and containment penetrations. RCC-M frames many of the manufacturing criteria such as choice of materials and conditions of supply, fabrication and test methods to be implemented, eligibility criteria for detected defects, etc.

Report: Management of a deviation relating to stress-relieving heat treatment of welds

 

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%).