October 17, 1940
Claim for an Invention from V. Maslov and V. Shpinel, 'About Using of Uranium as an Explosive and Toxic Agent'
In this letter two nuclear scientists from UIPhT described the construction of the nuclear bomb and proposed to start activities in producing of the nuclear arsenal and make these activities secret. Two Ukrainian physicists were first Soviet scientists who revealed the method of producing a nuclear weapon (of course they did not know about the similar inventions of western scientists which were made at the same time under great secrecy).
April 18, 1951
Review of Andrei Sakharov about Oleg Lavrentiev’s Paper
In this document, Andrei Sakharov, "father" of the Soviet thermonuclear bomb program, positively assesses Oleg Lavrientiev's ideas about the Soviet thermonuclear program, which were expressed in Lavrientiev's previously-written letters to Soviet leaders.
May 26, 1955
Proposal Concerning the Testing of an Experimental System for the Verification of the Casing Design
Proposal to develop a test warhead using radiation implosion to induce a thermonuclear reaction. The proposal emphasizes that the device will be compatible with the existing R-7 ICBM delivery system.
February 02, 1956
Note Containing an Assessment of the Parameters of a Device with Yields of 150 Megatons and One Billion Tons of TNT
A report on the material requirements and design specifications of nuclear devices with yields of 150MT and one milliard tons TNT between Soviet officials. Specifically, the use of lithium-6 deuteride and natural uranium in varying degrees is discussed.