In August 2021, the NRC approved a Topical Report (TR) written by Analysis and Measurement Services Corporation (AMS) to use online monitoring (OLM) technology to extend the calibration intervals of safety-related nuclear plant pressure, level, and flow transmitters. The technology can extend calibration intervals for up to 12 or more operating cycles providing significant O&M savings and reduced capacity factor risk.
A 2-page white paper on the OLM technology can be found at this link.