Excerpt from the document:
WHILE MANY DIFFERENT SYSTEMS ARE IN PLACE IN RUSSIA TO INSURE THE SECURITY OF NUCLEAR MATERIALS AGAINST THEFT OR DIVERSION , FEW IF ANY OF THE SE SYSTEMS WOULD MEET U.S. – STYLE STANDARDS FOR NUCLEAR SECURITY . SOVIET NUCLEAR SECURITY SYSTEMS WERE BASED ON CONCEPTS OF ISLOATION OF NUCLEAR MATERIALS AND SPECIALISTS AND ON PROTECTION AGAINST EXTERNAL THREATS ( FREQUENTLY SEEN AS U.S. SPYING OR SABOTAGE ).
The document was requested by The Black Vault through a “Mandatory Declassification Review” or MDR in February of 2018. The document was released in May of 2019 (and added to The Black Vault in November of 2020).