The Nonproliferation and Arms Control Technology Working Group (NPAC TWG) guides the research and development (R&D) of new verification and transparency technologies and assets. The Director of the VTT Office co-chairs the NPAC TWG with representatives from the Department of Defense and the Department of Energy. The NPAC TWG was established by Presidential Decision Directive 27 in 1994 to ensure effective coordination of research and development in the areas of arms control and nonproliferation and to guard against redundant arms control- and nonproliferation-related R&D and technology programs within and among departments and agencies. NPAC TWG focus groups and workshops support the liaison between the policy and technology communities by providing a forum where the two communities can interact. This allows technologists to inform policy makers of the capabilities and limitations of technology so that future verification requirements and regimes can be designed to reflect the art of the possible, while simultaneously allowing policy makers to communicate their needs and requirements to the technology development community. NPAC TWG workshops are targeted to specific technical issues. Two recent workshops focused on:

  • generating new thinking on above-ground nuclear detonation-detection in light of changing requirements and decreasing resources, and
  • developing a blueprint for the support infrastructure needed to enable various options for the next steps in arms control and nuclear nonproliferation.

More information on NPAC TWG can be found on its website at