- W68
The W68 warhead was the warhead used on the
UGM-73 Poseidon SLBM missile. It was developed in the late 1960s atLawrence Livermore National Laboratory .pecifications
The W68 weighs 367 pounds. The warhead's dimensions are not publicly known, however to fit the maximum load of 14 within the roughly 65 inch diameter Poseidon payload fairing, the Mk 3 Reentry Vehicle must be much smaller than other US RVs (which are mostly 22 inch diameter and mostly 72 inch long sized).
The W68 had a design yield of 40-50
kiloton s.Production and Deployment
A total of 5,250 W68 warheads were produced, the single largest production run of any American nuclear weapon model. It was manufactured starting in June 1970 and ending in June 1975. Each Poseidon missile could carry up to 14 warheads; at the peak deployment, there were 31 US Poseidon submarines with 16 missiles each, for a total of 496 deployed missiles, at a density of about 10 warheads per missile.
afety issues and later service
Aging safety problems with the LX-09 Plastic Bonded Explosive used in the W68 [ [http://www.globalsecurity.org/wmd/systems/w68.htm W68 warhead at globalsecurity.org] Accessed 2006-05-03] [ [http://www.banthebomb.org/archives/trisaf/ch5.htm Warhead Accidents at Banthebomb.org] Accessed 2006-05-03] [ [http://nuclearweaponarchive.org/Nwfaq/Nfaq4-1.html#4.1.6.2.2.5 Explosives section in nuclear weapons FAQ] Accessed 2006-05-03] [ [http://www-training-1.llnl.gov/training/hc/Explosive/Accidents.html LLNL explosives accident training web page] Accessed 2006-05-03] [ [http://query.nytimes.com/gst/fullpage.html?res=9905EED91539F930A35753C1A967948260 Relatives of 3 Killed in Blast At Nuclear Plant Lose Suit] from Oct 3, 1981 New York Times, Accessed 2006-05-03] required the whole production run to be retired or remanufactured with new explosives from November 1978 through 1983; about 2,000 units were retired starting in 1977 rather than rebuilt.
The remaining 3,200 warheads remained in service longer, with the last units were retired in 1991.
ee also
*
UGM-73 Poseidon
*List of nuclear weapons References
External links
* [http://nuclearweaponarchive.org/Usa/Weapons/Allbombs.html Allbombs.html list of all US nuclear weapons] at [http://nuclearweaponarchive.org nuclearweaponarchive.org]
* [http://www.llnl.gov/accomplishments/seventies.pdf Lawrence Livermore Labs accomplishments in the 1970s]
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