The SGLM 201K monitor forms part of the RAMSYS™ product line. It has been developed for steam generator leak rate monitoring. The 16N count rate is measured by a scintillation detector (NaI). The detector is installed in close proximity to the main steam line and it is thermally insulated to protect it from sharp temperature transients. The conversion from 16N count rate to volumetric activity is done utilizing coefficient established through Monte Carlo analysis. The conversion from 16N volumetric activity to leak rate (in GPD) is calculated using four correlations. The correlations are derived by thermohydraulic transport analysis based upon data provided by the user.
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