Overview . . vii Effect of Test Specimen Size on Graphite Strength . . 1 The Use of Small Graphite Specimen Test Data for Large Core Components for HTGR . . 30 Applicability and Limitations of Miniature Specimens for Properties Determination of Fine-Grained Graphite . . 65 Small-Scale Approaches to Evaluate the Mechanical Properties of Quasi-Brittle Reactor Core Graphite . . 84 Quality Control Using Inferential Statistics in Weibull-Based Reliability Analyses . . 105 The Scaling of the Strength of Nuclear Graphite with Particular Emphasis on Statistical Aspects and Implications for Testing . . 123 Sample Size Effects on Ultrasonic Measurements of Elastic Moduli-Experimental and Theoretical Investigations . . 144 Small Specimen Data from a High Temperature HFIR Irradiation Experiment . . 172 Specimen Size Effects in the Determination of Nuclear Grade Graphite Thermal Diffusivity . . 186 Size Effect on the Fracture Properties of Nuclear Graphite . . 199