b'1960 Advanced Reactivity Measurement Facilities The ARMF-I reactor was used to determine the characteristics of reactor fuelsand other materials subject to testing in the MTR. In tandem with MTR, it helpedimprove the performance, reliability and quality of reactor core components. In 1962,ARMF-II represented an advance due to its readout system, which automaticallyrecorded measurements on IBM data cards, allowing operators to process data quicklyin computers. 27'