Features

Our Reuter Stokes gamma and neutron TIP sensors are movable DC ion chambers that measure gamma and neutron flux, respectively, at the elevation of each LPRM sensor. The sensor operates in a neutron flux range from 1.5 E13 nv to 1.5 E14 nv, or from about 10 to 100 percent of the rated reactor power. Both styles of TIP sensors are driven in or out of the calibration tube by a drive mechanism that engages a helical drive cable that forms the outer sheath of the sensor signal cable. Between calibrations, the TIP sensor is withdrawn to a storage location outside primary containment. Several LPRMs can be calibrated with a single TIP sensor that is guided to the LPRM calibration tubes with an indexing mechanism.

Applications

Our gamma TIP sensors can help:

• Improve fuel utilization with further fuel depletion
• Reduce startup time by improving peaking factor calculations
• Simplify inventory storage and extend sensor life through the elimination of fissile material
• Improve accuracy of TIP calibration with less asymmetry variance and correction to nodal powers
• Extend time intervals between LPRM calibrations as a result of improved accuracy
• Increase operating margins with more accurate readings

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