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Overview IEC 61874:2025 - "Nuclear instrumentation - Geophysical borehole instrumentation to determine rock density ('density logging')" is the 2nd edition international standard that specifies requi…
Overview IEC 61874:1998 is an international standard that specifies design requirements and performance characteristics for nuclear instrumentation used in geophysical borehole logging to determine b…
1 Scope This document applies to equipment consisting of: a borehole logging probe equipped with a collimated radioisotope (gamma) source (during the actual measurements only) and a detector unit to…