A2W core 3 cant be beat from 1950's still? 1/10" thick ZrII. 1150 PCT to 560°F clad/moderator 1100 W/cm2/sec2. Forever. Declassed thirty years ago. Fission Rates 10x 20 th or so. No loss of strength. Mem who designed it top notch in history. Zero leaks on FEF your team unsung heroes
