non-fissile

The first two correspond to what is generally known as a reactor-grade Pu, sometimes defined as having more than 19% non-fissile isotopes.

Nuclear safeguards (non-proliferation) 2009

Type Composition Origin Use Reactor-grade from high-burnup fuel 55-70% Pu-239, 19% Pu-240, typically about 30% non-fissile Comprises about 1% of spent fuel from normal operation of civil nuclear reactors used for electricity generation As ingredient (c5%) of MOX fuel for normal reactor Weapons-grade Pu-239 with

Plutonium 2009

It was tested with a non-fissile tamper and bomb casing, so it did not use fissile materials to increase the yield; this made it one of the “cleanest” bombs ever tested.

Archive 2007-06-01 James Killus 2007

It was tested with a non-fissile tamper and bomb casing, so it did not use fissile materials to increase the yield; this made it one of the “cleanest” bombs ever tested.

The Neutron Dance James Killus 2007

Restarting reprocessing is a good idea on a number of levels–it reduces the amount of fuel needed and thus waste produced per kWh of electricity generated, and expands the amount of fuel available to us by orders of magnitude by allowing us to use the far more common but non-fissile isotope U-238 in power generation.

A Good News/Bad News Day for the Nuclear Energy Industry - Freakonomics Blog - NYTimes.com 2007

A conventional bomb that contains non-fissile radioactive material obtained from a non-secure nuclear waste management/packaging plant that deals with radioactive materials that result from the reprocessing of nuclear fuels and/or medical radiography sources.

Warmest in a Millll-yun #2 « Climate Audit 2006

Naturally occurring uranium is composed of 99.7% non-fissile U-235, and only 0.7% U-238.

Exultate Justi 2002

This spinning separates the fissile U-235 in the gas from the more common, and non-fissile U-238, and allows for the extraction of the enriched and depleted forms of uranium from collection “scoops” along the inside of the central post around which the centrifuge spins.

Archive 2002-12-01 2002

In this method, a source of neutrons is utilized in the conversion of non-fissile isotopes such as U (Uranium)-238 or Th (Thorium)-232 into their fissile counterparts, Pu (Plutonium)-239 or U-233.

Archive 2002-12-01 2002

Those bodies which cannot behave like this are non-fissile.

Meteorology 2002