What is "butugychag"

Butugychag Corrective Labor Camp was a part of the bigger Berlag, a subdivision of GULAG. The camp existed during 1945–1955 in the Kolyma region of North-Eastern Russia (later Magadan Oblast). The camp is mostly known for its deadly uranium mines. It is mentioned by some Russian historians such as Jores and Roy Medvedevs. It is one of a small number of camps where prisoners mined uranium, the truth of which has only recently been recovered.