PWR operators are required to perform bare metal visual (BMV) inspections of their Reactor Vessel Heads (RVH) including the interface around each CRDM / CEDM penetration, head vent (if present), and 100 percent of the bare metal down to the flange in accordance with code case N-729-6.

Operating nuclear plants are required to perform various Non-Destructive Examinations (NDE) of their Reactor Vessel Heads (RVHs) in accordance with federal regulations and ASME Code Section XI.

Operators of Pressurized Water Reactors (PWRs) with reactor vessel (RV) nozzle dissimilar metal (DM) safe-end welds, which are susceptible to primary water stress corrosion cracking, are required to examine those welds with increased frequency unless mitigating actions are taken. Requirements for these examinations are specified in American Society of Mechanical Engineers (ASME) Section XI, Code Case N-770 latest approved revision specified in 10CFR50.55a.

The WESDYNE® INTERNATIONAL team has proven its capability to solve the most complex and urgent inspection challenges in the nuclear industry in a safe and efficient manner.

When it is not possible to perform a metallographic examination by taking a sample directly from a part to be checked, an investigation can be performed through a replica process. After a proper surface preparation, cellulose acetate sheets are used to make a copy or “replica” of the microstructure of the metal surface to be examined.

Socket welds are used in numerous applications throughout the nuclear industry and due to the unique configuration, size and other limitations, ultrasonic inspection can be challenging. Westinghouse Inspection Services has the equipment, qualifications, and personnel to perform socket weld inspections for the thermal and vibration fatigue degradation mechanism. Even a slight stress flaw is detectable with the help of Westinghouse’s experience and advanced technology.

"Our standard inspections provide robust and precise solutions. We also are able to adapt to changing outage schedules through our access to more than 80 NDE qualified individuals trained for nuclear site work globally. We use experienced people and also have a strong internal development process.

Reactor Pressure Vessel Head (RPVH) Thermal Sleeve (TS) flange wear failure is a known ageing phenomenon on PWR plants. Westinghouse offers a direct visual inspection system capable of accurately assessing Thermal Sleeve and adaptor wear, as well as locating any flange debris in the adaptor housing. The inspection tools are delivered by a tool carrier for an ALARA-optimized inspection.