Yes, this is being done and researched now. https://www.aps.org/publications/apsnews/201404/neutrinos.cfm https://www.aps.org/publications/apsnews/201404/neutr

Yes, this is being done and researched now. https://www.aps.org/publications/apsnews/201404/neutrinos.cfm https://www.aps.org/publications/apsnews/201404/neutrinos.cf... http://www.economist.com/news/science-and-technology/21651165-it-may-be-possible-detect-plutonium-factories-distance-watcher http://www.economist.com/news/science-and-technology/2165116... http://arxiv.org/pdf/1502.01132v1.pdf http://arxiv.org/pdf/1502.01132v1.pdf