SANS Investigations of the Irradiation-Caused Structural Damages in VVER-440-Type Reactor Pressure Vessel Steels


SANS Investigations of the Irradiation-Caused Structural Damages in VVER-440-Type Reactor Pressure Vessel Steels

Böhmert, J.; Große, M.; Nitzsche, P.

Small-angle neutron scattering (SANS) experiments were performed at KWS2 facility of the KFA Jülich for investigating the defect structures, which are produced by neutron irradiation in Russian Cr-Mo-V alloyed reactor pressure vessel steel. Irradiation and post-irradiation annealing considerably change both SANS intensity and its course in the Guinier plot, which was analysed by the Glatter method. As a rule, bimodal size distribution functions were found with a first maximum at a radius of 1-2 nm and a second maximum at 6-8 nm. Irradiation increases the first maximum annealing reduces it.

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Publ.-Id: 1745