Steam Generator Leak Monitors

Mirion designed a detector assembly based on NaI(Tl) scintillation detector coupled to a photomultiplier tube specifically developed to perform 16N monitoring under severe environmental conditions. The SGLM (with or without shielding) is a non-intrusive system, providing fast measurements and minimizing the need of taking frequent samples for laboratory analysis. The estimation of the leak rate is then given by either a LPU, LPDU or DAK that processes the signal coming from the detector.

SGLM 201K™
Steam Generator Leak Rate Monitor

The SGLM 201K monitors steam generator leak rate in PWR nuclear power plants by measuring 16N volume activity.

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SGLM 202K™
Steam Generator Leak Rate Monitor

The SGLM 202K monitors steam generator leak rate in VVER nuclear power plants by measuring 16N volume activity. The NaI scintillator is embedded in a 2 π 2’’ lead shield.

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