EDF · Framatome · Orano · Westinghouse · KEPCO — RCC-M · ASME III
Industries — Nuclear
Surface treatment, ultrasonic peening and HFMI on critical nuclear power plant components. Steam generators, reactor internals, nozzles, primary structures. RCC-M, ASME III, IAEA standards compliant. Controlled-zone operations.
AMS 2430 · AMS 2432 · Mil-S-13165
hfmiIIW 2016 · DIN 50100 · EN ISO 9013
needle-peeningDIN EN 1011-2
ultrasonic-peeningISO 21420
replica-surfaceASTM E1351
EDF · Framatome · Orano · Westinghouse · KEPCO · Rosatom · CEA
Context and positioning
Nuclear demands special processes in a controlled environment, on critical components whose failure has major consequences. Kronos operates on thermo-mechanical fatigue (steam generators, vessel internals, nozzles) and on stress-corrosion-cracking resistance (IGSCC).
Our preferred processes in nuclear: ultrasonic peening (no projected media — mandatory in controlled zones), HFMI (critical welds) and in-situ surface replica (non-destructive inspection).
Typical operations
Abrasive-free process — suited to strict-containment zones.
Fatigue-life improvement on nozzles and attachment zones.
In-situ characterization of surface defects (IGSCC, fatigue cracks) without removal.
Analysis and process recommendations for extended operating cycles.
OEM standards and specifications
Why Kronos in this sector
Mastery of abrasive-free processes. Ultrasonic peening is our specialty — particularly suited to nuclear environments where classical media projection is prohibited.
Technological independence. Our recommendations are never biased by a commercial relationship with a nuclear equipment manufacturer.
Frequently asked questions