pressurizer during the pre-delivery hydrostatic test. The measured strain curves are discussed\nto find the deformation features of the cylinder. The stresses of cylindrical base\nmetal, longitudinal welds and girth welds are calculated and compared with the theoretical\nvalues. The stresses in girth welds and upper head nozzle welds show non-uniformity at\nthese areas. The possible reasons are discussed for this phenomenon. The stress intensity\nis calculated and evaluated according to the allowable limit. The fatigue usage factor is\nevaluated by considering the effect of internal pressure rise-and-fall cycle to pressurizer�s\ntotal fatigue life. The evaluated results show that the hydrostatic test has little effect on the\nintegrity or fatigue life of the pressurizer. This test provides the basic deformation data of\nthe pressurizer, which plays an important role in the ageing assessment and management\nduring operation.
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