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The NESC1 spinning cylinder experiment is aimed at studying the entire process of structural integrity assessment of underclad and throughclad cracks in pressurized water reactor (PWR) vessel steels. A spinning cylinder was subjected to conditions of pressurized thermal shock. The failure event of the cylinder in the test was postulated to be cleavage followed by arrestor alternatively ductile tearing followed by cleavage and arrest. Determination of the mechanical and physical material properties of the forging, the cladding and the heat affected zone (HAZ) was required as an input to the thermal stress analysis and to the fracture mechanics analysis. Therefore, an extensive material characterization programme was performed by eight European organisations. For the characterisation testing, a piece of the cylinder material cladded and heat treated to similar fabrication specifications as those of the spinning cylindes was used. An outline is given of the material characterization programme and results of material tests and analysis needed for designing the test and organizing pretest fracture assessment analysis, focussing on the results concerning the cleavage fracture.

Additional information

Authors: RINTAMAA R, VTT Manufacturing Technology (FI);VON ESTORFF U, EC/JRC/IAM (NL);FEDELI G, ENEA (IT);GILLOT R, MPA, Stuttgart (DE);HOUSSIN B, Framatome (FR)
Bibliographic Reference: Paper presented: International PVP Conference, San Diego, July 26-30, 1998
Availability: Available from (1) as Paper EN 41738 ORA
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