Radiographic Testing in Power Generation: What It Finds, What It Misses, and What Governs It
What RT is actually used for in power generation
High-energy piping welds in power stations are radiographed at construction and selectively in service, with records retained against creep-life assessment.
How RT works
Radiography passes X-rays or gamma radiation through the component onto film or a digital detector. Density differences in the image reveal what the material contains — porosity, slag, lack of fusion, and the internal geometry of a weld — producing the one thing no other method gives: a permanent, reviewable image of the volume examined.
What RT will not do
What RT will not do reliably: find tight planar defects lying perpendicular to the beam, because a crack with no measurable width casts almost no shadow. It also requires access to both sides, controlled radiation areas that shut down surrounding work, and licensed sources — which is why RT is scheduled around the plant rather than the plant around RT.
The power generation assets this applies to
Boilers and HRSGs, headers and steam piping, turbine rotors and blading, generators, condensers and feedwater heaters, and the structural steel around them.
The damage mechanisms driving the examination
Creep and thermal fatigue in high-temperature circuits, flow-accelerated corrosion in secondary systems, tube degradation in condensers and exchangers, and fatigue in rotating equipment.
What governs acceptance
ASME construction codes for pressure parts, Section XI where the plant is nuclear, and fleet-specific programmes that frequently add examination beyond code minimum. The outage window governs everything operationally. On the method side: ASME Section V Articles 2 and 22 for technique; ASME Section VIII and B31.3 for acceptance; API 1104 for pipeline girth welds; ISO 17636 in international scopes. An examination that is technically sound but performed outside the governing regime is not an examination anyone will accept, which is why the code family matters as much as the technique.
How Atlantis delivers RT in this sector
Atlantis mobilises examination teams to your site under Atlantis procedures with ASNT Level III oversight — we do not claim a depot or laboratory in every market, and say so plainly. What you receive is the examination performed to a qualified procedure, findings evaluated against the acceptance criteria your contract names, and records structured to survive a client audit years later.
Radiographic Testing services · RT training and certification · Power Generation programme consulting · Power Generation NDT training · scope a RT examination.
RT in other sectors
Refining · Petrochemical · LNG · Offshore · Pipeline · Marine & Shipbuilding.