Presentation on theme: "钍基熔盐核能系统 ASTM and TMSR irradiation program Derek Tsang SINAP 20.09.2013."— Presentation transcript:
钍基熔盐核能系统 ASTM and TMSR irradiation program Derek Tsang SINAP
Introduction SINAP has a irradiation program to get i-data for material used in molten salt reactors. Metal and graphite ASTM standards will be used in all the material properties measurement. Irradiation temperature is 650 ℃ Max dose for metal is 2.5×10 19 n/cm 2 （ E > 0.1MeV ） Max dose for graphite is 5×10 20 n/cm 2 （ E > 0.1MeV ）
Metal irradiation program Total samples = 136 Samples for irradiation = 46 PropertiesASTM HardnessASTM E18-12, E10-12 FatigueASTM E606/E606M-12 Charpy impact testASTM E23-12 Modulus and Poisson's ratioASTM E111-04, ASTM E Tensile testASTM E8/E8M-09, ASTM E21-09
Tension and Impact Lab Creep and Rupture Lab Fatigue Lab Heat Treatment Lab Metallographic Preparation Lab Hardness Tester and Microscope Mechanical Properties Platform Lab Introduction-1
Other Analytical Instrument Lab Introduction-2 Corrosion Lab 6 Thermal Properties Lab Microscope and Photometer TEM 石墨样品制备实验室 Welding Lab
Graphite irradiation program Total samples = 312 Samples for irradiation = PropertiesASTMno. of samples Thermal diffusivityASTM C Specific heat capacityASTM E Bulk DensityASTM C Young's modulusASTMC Flexural strengthASTM C Tensile strengthASTM D Compressive strengthASTM C CTEASTM E
Tensile strength Tensile strength sample size in ASTM is too big for our irradiation program D3967 is for rock tensile strength Underestimate graphite tensile strength More experiment and analytical/numerical studies. New ASTM standard for graphite tensile strength?
DYM or SYM Gas cooled reactor: gas has no mechanical effect on graphite. May not be true for molten salt reactor. 3 ways to do graphite irradiation experiment for molten salt reactors A.Not consider molten salt at all B.Graphite samples in a container with molten salt and irradiate together. C.Force molten salt into graphite samples before irradiation experiment.
Standard requires no liquid inside the samples! After irradiation experiment to measure DYM at what temperature? High DYM at room temperature Virgin DYM at high temperature Virgin graphite with molten salt Virgin graphite without molten salt
Some thoughts ASTM Standards mainly for nuclear graphite in gas cooled reactor. Nuclear graphite in molten salt reactor may need NEW ASTM standards???