The International Atomic Energy Agency (IAEA) works with its Member States to promote safe, secure and peaceful nuclear technologies. In a context of international tension and nuclear renaissance, neutrino detectors could help IAEA to enforce the Treaty on the Non-Proliferation of Nuclear Weapons (NPT)…[A] futuristic neutrino application could help detect and localize an undeclared nuclear reactor from across borders. The SNIF (Secret Neutrino Interactions Finder) concept proposes to use a few hundred thousand tons neutrino detectors to unveil clandestine fission reactors….The proposed detector will fit inside an oil supertanker. The main challenge would be to operate such a huger detector (138,000 tons) underwater.

Excerpt Thierry Lasserre et al, SNIF: A Futuristic Neutrino Probe for Undeclared Nuclear Fission Reactors, Nov. 16, 2010