The closed town means Closed Administrative Territorial Unit ( an area that has local government bodies, created in accordance with the procedure provided for in Article 2 of CATU Act of 14.07.1992 N 3297-1) in order to ensure the safe operation of organizations located on its territory engaged in the development, manufacture, storage and disposal of weapons of mass destruction, radioactive and other the danger of technogenic nature of materials, military and other objects (hereinafter - organizations and / or objects) for which in order to ensure the defense of the country and the security of the state, a special regime of safe operation and protection of state secrets is established, including special conditions for citizens. - restricted area for the foreigners, no free movement but at one's invitation.

To this end, the recipient party needs to contact to the Immigration Police station in Raduzhny 2 months prior to the expected arrival of the guest to issue a permit to enter foreign citizen to CATU Raduzhny.

A Russian person can travel to Raduzhny also at one's invitation.

http://www.raduzhnyi-city.ru/about/info/omvd/17482/?sphrase_id=30549