1. Nuclear Engineering Teaching Laboratory, The University of Texas at Austin, 1 University Station R9000, Austin, TX 78712-0292, USA
2. Center for Electromechanics, The University of Texas at Austin, 1 University Station R7000, Austin, TX 78712-0292, USA
3. Department of Nuclear Engineering, Texas A&M University, 3133 TAMU, College Station, TX 77843-3133, USA