Those bodies which cannot behave like this are non-fissile.    From Wordnik.com.  [Meteorology] Reference

Naturally occurring uranium is composed of 99.7% non-fissile U-235, and only 0.7% U-238.    From Wordnik.com.  [Archive 2002-12-01] Reference

The first two correspond to what is generally known as a reactor-grade Pu, sometimes defined as having more than 19% non-fissile isotopes.    From Wordnik.com.  [Nuclear safeguards (non-proliferation)] Reference

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.    From Wordnik.com.  [Archive 2002-12-01] Reference

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.    From Wordnik.com.  [Archive 2002-12-01] Reference

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.    From Wordnik.com.  [Plutonium] Reference

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.    From Wordnik.com.  [A Good News/Bad News Day for the Nuclear Energy Industry - Freakonomics Blog - NYTimes.com] Reference

These elements-a group that includes americium and neptunium-are known as non-fissile transuranics.    From Wordnik.com.  [U.S. News] Reference

Others place greater emphasis on the threat of a radiological dispersal device harnessing non-fissile radioactive materials.    From Wordnik.com.  [TODAYonline] Reference

Natural uranium mined from under the ground is predominantly U-238, a non-fissile material, and contains less than 1 per cent of U-235 and even smaller traces of U-233.    From Wordnik.com.  [The Hindu - Front Page] Reference

Fission reactors convert non-fissile, low-activity U-238 (99. 3\% of all natural U) into a host of things, but most interestingly, into Pu-239, a highly toxic, long-lived fissionable material.    From Wordnik.com.  [BlueOregon] Reference

In order for China to greatly increase the amount of power generated from its existing uranium stocks, it would have to develop the capability to use nearly all of the non-fissile uranium-238.    From Wordnik.com.  [Yahoo! News: Business - Opinion] Reference

Innovations lauded even by former anti-nukes-inherently-safe, advanced reactors that can consume spent fuel or that come in small, scalable modules and non-fissile, recyclable thorium fuel-will make nuclear power even greener.    From Wordnik.com.  [SEEDMAGAZINE.COM] Reference

Uranium would need to be enriched to over 90% U-235 (instead of about 5%) and plutonium would need to be manufactured specially for weapons — reactor-grade material (over 20% and usually over 30% non-fissile isotopes) cannot be enriched to weapons-grade (weapons-grade plutonium is normally made in special production reactors.    From Wordnik.com.  [Nuclear safeguards (non-proliferation)] Reference

They are as follows: to be apt or inapt to solidify, melt, be softened by heat, be softened by water, bend, break, be comminuted, impressed, moulded, squeezed; to be tractile or non-tractile, malleable or non-malleable, to be fissile or non-fissile, apt or inapt to be cut; to be viscous or friable, compressible or incompressible, combustible or incombustible; to be apt or inapt to give off fumes.    From Wordnik.com.  [Meteorology] Reference