MR 31 : The hasty, heavy, inefficient, warm and monstrous first missile warhead of the french nuclear stockpile
A MR 31 warhead being loaded on its missile in a silo. A fireman with a hose stands ready. Photo from Franck Laidin's collections Because of the very sensible aspect nuclear weapons have, it is very complicated to find detailed informations about them. In France, archives whose divulgation could help concieve, build, use or locate weapons of mass destruction are definitely off limits (Art L.213-2, French code of patrimony). However, there are some ways to get open source limited insights on these topics About the Munition Radiologique 31, France's first strategic missile nuclear warhead, used on top of the S2 IRBM from 1971 onwards, some information has been able to get on the surface. This warhead is a device only using pure fission of its plutonium core to get a yield of about one hundred kilotons. A particulary heavy warhead (about 750 kg, without thermal protection for reentry), the phyics package seems to have been tested in In Ecker, in the...