STRAIN MEASUREMENT ON A COMPACT NUCLEAR REACTORPRESSURIZER

摘要

This work presents the strain measurement procedures applied to a compact nuclear reactor pressurizer,during a hydrostatic test, using strain gage technology.The temperature of the pressurizer wall was kept at 25 oC during the measurement and the pressurizer loadingwas performed using the following pressure steps:Step 1: 140 Kgf/mm mm2Step 2: 170 Kgf/mm mm2Step 3: 210 Kgf/mm mm2The measurement points on both internal and external pressurizer walls were established from pre-calculatedstress distribution by means of numerical calculation (finite elements modeling).Strain values were obtained using a quarter Wheatstone bridge circuit.Stress values were determined from experimental strains and were compared to numerical calculation results.