This article presents corrosion data and microstructural analysis data of austenitic stainless steels AISI 316L and AISI 347H exposed to supercritical water (25 MPa, 550 °C) with 2000 ppb of dissolved oxygen. The corrosion tests lasted a total of 1200 h but were interrupted at 600 h to allow measurements to be made. The microstructural data have been collected in the grain interior and at grain boundaries of the bulk of the materials and at the superficial oxide layer developed during the corrosion exposure.

The main target of the EURATOM FP7 project “fuel qualification test for supercritical water-cooled reactor” was to make significant progress toward the design, analysis, and licensing of a fuel assembly cooled with supercritical water (SCW) in a research reactor. Within the project, fuel pin mock-ups of a future fuel qualification test facility were designed and manufactured by Centrum Výzkumu Řež (CVR). Following that, it was decided to conduct three different types of tests considering two possible accident scenarios. Simulation of loss of external pressure was the target of Test 1. The autoclave was depressurized as fast as possible from 20 to 1 MPa by opening the close valve located behind the cooling part of the high-pressure part of the loop. Pressure inside the pin was held at a constant value of 20 MPa by pumping high-pressure water via the pin and in parallel via a separate relief valve that was connected directly to the pin using the filling pressure tube. A similar approach was chosen when the opposite case, i.e., loss of internal pressure in the pin, was simulated in Test 2A. Eventually, Test 2A was repeated with modified setup to determine the lower limit of the internal pin pressure (i.e., collapse/buckling of the pin due to external overpressure) more accurately. The presented paper summarizes the results of all three performed tests.

ICE &JS Frcsthner, A.G. Youtso T 7/inke ndM KJthkojivi/o QIMllA1I &IINPJIqZII OMDDZIIi1kfrE1Rth thJtreJThIIDJe1&AdVIXTIJMItet1Ah PcAstbw2 l755ZGPetten, The Nethethnds (KEF&JsJ;: rii I7IrAwuMkY' &AX 1(3AthiesRaia Livermore Cdffo,th94550 USA)A fresh approach to the prindpk ofthe delay leg interferometer which was ultimately devekped by Barker, Hemsing and others as the *vISARP (Velocity Interferometer System for Any Reflector) has resulted in an imp!emitation which is simple, reliable, cost effective and paNe of velocity measurements with sub-nanosecond time resolution.Results from laser induced shock exfoliation experiments which measure the adhesion strength of thin films on ceramic substrates are reported These experiments require resolution of the shock structure produced by a 0.3 or 8 nanosecond NdYAG laser pulse interacthig with a 0.5 to 1 micrometer thick energy absorbing layer deposited on the rear surface of the substrate,khin-film specimen, representative of an advanced turbine blade structure. Measurement of the vek)dty details of the film free surface duiing exfoliation, by Ek)ppler shift of reflected laser light allows direct determination of the adhesion strength of the film/substrate interface at high strain rates and in ideal one-dimensional plane strain conditionsThe extremely small scale of the experiment requires very high time resolution. The Ekppler Velocity Interferometer developed for these stlies will be descriled in detaiL &gnfficant features indude replacing the usual glass etalon with a zero-cost air delay leg, an extremely short optical path length, compact, rack-mounted configuration, all solid-state components including ifiumination by semiconductor diode laser and signal detection with sub-nanosecond PIN photodiodes.