R-2 WMD Warheads

[World B4]

I've seen several sites claim that in 1956, the USSR tried to provide the R-2 missile with an RDS-4 fission warhead. The words experimented and tested are used, but I've never seen any photo, diagram, or a sourced history of this brief project and I'd love to know more. Testing this warhead on an R-5M that same year made the concept obsolete, though the R-2 served until 1961/62 with conventional warheads.
http://militaryrussia.ru/blog/topic-267.htmlhttp://militaryrussia.ru/blog/topic-911.htmlhttps://wwiiafterwwii.wordpress.com/2017/10/02/the-v-2-in-the-ussr-after-wwii/Geranium & Generator-2 Radiological Warheads
https://web.archive.org/web/20230618130917/https://warspot.ru/17413-yadernaya-pyatyorkahttps://ru.wikipedia.org/wiki/Генератор_(военна%Apparently there's some controversy as to whether the last 2 Generator-2 launches were testing an operational weapon or not.
I have never seen any photos or diagrams of these warheads and I would love to.

 

[Scott Kenny]

A Russian 2200lb nuclear warhead, in the mid 1950s?

I'm not saying no, but that would have been not just state-of-the-art, but bleeding-edge of the state of the art tech.

 

[Ravinoff]

The radiological warheads are an interesting historical footnote, and something I'm surprised didn't get more attention. Particularly the part about using a liquid for it, I'd be curious to know if it used a bursting charge or a spray system.