The service life of nuclear reactor pressure vessel steel directly determines the service life of nuclear power plant.The long-term service of pressure vessel steel under neutron irradiation will grad-ually produce many dislocation loops and nanoclusters,resulting in material embrittlement and threaten-ing the safe operation of nuclear reactors.The traditional annealing treatment can partially restore the material properties,but the pressure vessel needs to be disassembled as a whole,resulting in a long shut-down of the reactor and huge economic losses.As a green and efficient technology,"in-situ"pulsed elec-tric current processing provides a new pathway to prolong the service life of nuclear reactor pressure ves-sel.This study provides a brief overview of the repair mechanism of pulse current,the construction of service life prediction equation and practical cases,which is of great significance for the development of life extension technology for key components of nuclear reactors in the future.
pulsed electric currentnuclear reactor pressure vesselirradiation-induced defectsper-formance repairlife prediction
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