Our online monitoring (OLM) technology was approved by the US Nuclear Regulatory Commission in 2021 to optimize the calibration frequency of nuclear plant pressure, level, and flow transmitters by statistically analyzing transmitter data stored in the plant computer. OLM helps to identify drifting transmitters whose calibration have exceeded acceptance criteria. This allows plants to focus their calibration resources on transmitters that need calibration as opposed to calibrating everything, which has been the traditional industry practice. As of 2025, nearly half of ninety-five nuclear power plants in the US have contracted AMS to implement OLM as this technology can save a plant nearly one million dollars per year in direct and indirect costs. This is in addition to the Sizewell nuclear power plant near London, England which implemented our OLM technology in 2006, covering hundreds of sensors and saving nearly five million dollars in calibration costs every two years.

In contrast to other methods of extending transmitter calibration intervals like the Surveillance Frequency Control Program (SFCP), the OLM methodology does not require Probabilistic Risk Assessment (PRA) or extensive transmitter drift evaluations and can extend calibration intervals for up to 12 cycles as opposed to the current 36-month extension limitation for the SFCP. Additionally, there is no need for any plant modifications or installation of any new equipment to implement OLM. All that is needed for OLM is already available from the plant computer.

To facilitate outage preparation and planning for a plant with implemented OLM, preliminary data analysis would be provided to the site mid-cycle with formal results submitted within a couple of days after the shutdown of the plant. The methodology is further constructed to utilize existing instrument uncertainties without the need for expensive safety setpoint and accident analysis changes.