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by an acoustical shielding tube, and an emission face for the ultrasonic beam. The waveguide sensor approach has been demonstrated by feasibility experiments in water. The 10 m long waveguide sensor has a resolution of approxi- mately 2 mm. tests, fatigue crack growth tests, and creep crack growth tests on Mod.9Cr-1Mo tubular specimens including defects. Fatigue crack growth rates have been obtained for temperatures of 500, 550, and 600°C and for load ratios of 0.1 and 0.3, and the information was contributed to the Project. Test data will be used to develop high temperature defect assessment procedures. V. SUPERCRITICAL CO2 BRAYTON CYCLE ANL, SNL, JAEA, and KAERI have contributed results from ongoing work covering complementary facets of the development of the supercritical carbon dioxide (S-CO2) Brayton cycle for advanced energy conversion for SFRs. Test results have been contributed on the performance testing of small-scale diffusion- bonded heat exchangers representative of compact heat exchangers having cores similar to those envisioned for use as recuperators in the S-CO2 cycle, testing of a small-scale S-CO2 compressor, experiments on sodium-CO2 interactions, and CO2 corrosion and carburization tests. ANL provided results from performance testing of a small-scale 17.5 KW nominal heat duty Printed Circuit Heat ExchangerTM (PCHETM, Heatric Division of Meggitt (UK) Ltd.) for CO2-to-CO2 heat exchange under prototypical low temperature recuperator (LTR) conditions of pressure, temperature, and scaled flowrate. The ANL S-CO2 Heat Exchanger Testing Facility was modified from its earlier configuration for CO2-to-water heat exchange testing to a new configuration incorporating a low pressure S-CO2 loop with electrical resistance heating and a separate high pressure S-CO2 loop having a different flowrate with heat rejection to water. The two loops are thermally connected through the PCHE which has a core mocking up a portion of the core of a full-size LTR module. Data was obtained for sixty-three sets of steady state operating conditions for which heat exchange rates and pressure drops were determined. Friction factor and heat transfer correlations for zigzagged semicircular micro– channels2 were tested against the data. E e r Em mi i s ss s i i o o n n F F a ac c e 0m m Figure 2: KAERI Waveguide Sensor Module. CEA is developing an approach for inspection of in-vessel sodium components for dislocations or deformations using ultrasonic transducers strictly located outside of the reactor vessel.1 The ultrasonic waves must thus propagate across several interfaces in traveling through the reactor vessel, potentially an intermediate structure, and finally the structure to be inspected. Initial development has focused upon a configuration involving three vertical steel walls for which two approaches have been investigated. The first employs ultrasonic waves at normal incidence using a single transducer and tuning the signal frequency and duration to promote constructive interference of the various reflected waves which is dependent upon the thicknesses and separation distances of the walls. The second approach utilizes oblique incidence and employs two transducers to take advantage of the existence of angular conditions for which transverse waves can have amplitudes exceeding those of longitudinal waves at normal incidence. IV. LEAK-BEFORE-BREAK KAERI is developing an evaluation approach for application of the leak-before-break principle to sodium piping and structures fabricated from Mod.9Cr-1Mo (G91) ferritic steel. To this end, KAERI has been performing creep-fatigue crack initiation and crack growth GIF Symposium – Paris (France) – 9-10 September, 2009 249 r ri ip p P Pl l a at te Li iq qu u i id d W W e ed dg g e U l l t t r ra a s so on ni ic cT Tr ra a n ns s d du uc ce er SFR Component Design and Balance of Plant 1 1 0 R m R a ad di ia a t t i io o n n B B e ea am S eL eU Sh hi i e e l ld d T Tu u b b e e W Wa a v v e e g g u u i id d e e S S t tPDF Image | SFR COMPONENT DESIGN AND BALANCE OF PLANT PROJECT
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