Determine the persistence of mechanistic–empirical separation across operating conditions

Determine how much the separation between the mechanistic point defect model extrapolation and the empirical power-law extrapolation persists when the temperature and dissolved-oxygen concentration differ from the single calibration condition of 240°C and 0.4 ppm dissolved oxygen.

Background

The model and the empirical power-law description are compared using data collected at only one temperature and dissolved-oxygen concentration. The paper maps predicted sensitivity over a broader operating envelope, but this is a forward projection based on assumed temperature and oxygen-response laws rather than validation with multi-condition measurements.

Because the extrapolated separation is the principal practical consequence of the model identification, determining whether it remains reliable under changed reactor-water conditions requires additional experiments at multiple temperatures and oxygen levels.

References

The separation above is established at the one operating condition the data were collected at, which leaves open how much of it survives a change of condition.

— Sparse data limit what a mechanistic corrosion model can predict  (2609.11869 - Feugmo, 10 Sep 2026) in Section 3.2, “Long-time extrapolation and operating-envelope sensitivity”