2017 | AFC ACCOMPLISHMENTS 21 fracture resistance (J-R) curve from test data was modified accordingly. In the simplified fracture testing, therefore, only two components of data, i.e., a load versus load-line displacement curve and a fracture surface photograph, are required to be obtained for calculation of fracture resistance (J-R) curve and fracture toughness parameters (KJQ and JQ). This fracture toughness testing and evaluation technology (Figure 3) was proven to be particularly effective for processing irradiated miniature specimens, which have been widely used in post-irradiation evaluation of nuclear materials. In particular, the new procedure not using attached displacement gage enabled us to test high dose specimens at high temperatures, where obtaining correct crack growth data with a traditional testing method is almost impossible because of high friction at specimen-jig contacts and difficulties in attaching displacement gage to miniature specimens. Because of its excellent efficiency, the new fracture testing and evaluation procedure is currently used for nonirradiated standard sized specimens as well as for irradiated miniature specimens.