The proposed action would be to design, construct, and operate a High Explosive Science and Engineering (HE S&E) facility that would support NNSA’s mission at the Pantex Plant. This would include developing and sustaining high quality scientific staff and supporting computational and experimental capabilities as well as developing additional evaluation and diagnostic tools for the evaluation of technology development. The HE S&E facility would serve as the scientific and engineering hub supporting all High Explosive Center of Excellence activities and technology development activities at Pantex.