“Physicists have recently demonstrated neutrino detectors that can continuously watch for the removal of plutonium in nuclear reactors” writes Katherine Wright, senior editor for Physics. In particular, researchers from Lawrence Livermore National Laboratory, Virginia Tech,  UC-Berkeley, University of Michigan, and North Carolina State University provide an overview of several potential anti-neutrino detection applications, including the near-field monitoring of known reactors, far-field monitoring of known reactors and discovery of undeclared reactors, and monitoring of reactor waste streams.

Colloquium: Neutrino detectors as tools for nuclear security
Adam Bernstein, Nathaniel Bowden, Bethany L. Goldblum, Patrick Huber, Igor Jovanovic, and John Mattingly
Reviews of Modern Physics 92, 011003 – Published 12 March 2020
https://doi.org/10.1103/RevModPhys.92.011003

Dr. John Mattingly is an associate professor of nuclear engineering at NC State University. He is the principal investigator and chief scientist for the US Department of Energy, Nuclear Nonproliferation Security Administration-funded (NNSA) Consortium for Nonproliferation Enabling Capabilities (CNEC). His research team, RADIANS, conducts applied research in radiation measurement and analysis methods for nuclear security applications, including arms control, safeguards, nonproliferation, counterterrorism, emergency response and forensics.