Unique AMS capabilities for in-plant cross calibration include a computerized data acquisition and analysis system with the capability to correct the acquired data for plant temperature stability and uniformity encountered during the tests. AMS performs calibrations to MIL-STD 45662A, 10CFR50 Appendix B, ANSI, ISA, IEEE, ASTM and other standards. These courses are specially designed to meet a customer's training needs in the areas of process instrumentation and maintenance, sensor testing, instrument calibration, surveillance and diagnostics in nuclear power plants and other facilities, as well as other related subjects. This technique is based on analyzing the natural fluctuations that exist on the DC output of process sensors while the plant is operating. The fluctuations are then analyzed by experienced personnel to yield dynamic information about the process or the process sensors.
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With the plant at power, the noise analysis technique is used to measure core temperature and flow relationships, and any associated anomalies. Noise data is taken from temperature, pressure, neutron and other sensors in the plant to study the dynamics of the core. AMS provides equipment, training and services needed to implement a long-term testing program to diagnostically evaluate and trend BWR stability. The technique is being developed under a research and development project sponsored by NASA's Marshall Space Flight Center. The MTC can be determined from the correlation between fluctuations in the neutron flux, as measured by the neutron detectors, and the primary coolant temperature, as measured by the core exit thermocouples.