We may end up using ISRU provided Thorium in subcritical reactors that my friend Roger Lenard talks about so eloquently.    From Wordnik.com.  [NAS Seeks Public Input on Space Goals - NASA Watch] Reference

This work uses "subcritical" tests that do not involve full nuclear detonations, and computer simulations of how a weapon would explode.    From Wordnik.com.  [CJR] Reference

The situation is similar for the free subcritical string.    From Wordnik.com.  [Guest Post: Joe Polchinski on Science or Sociology?] Reference

Another twelve were subcritical but in need of medical intervention.    From Wordnik.com.  [Asimov's Science Fiction]

Wolfgang, note that Jacques also mentions the 2-d subcritical string.    From Wordnik.com.  [News From The Front, II] Reference

This new approach is called the accelerator-driven subcritical reactor (ADSR).    From Wordnik.com.  [Calculating the speed of light; building nuclear reactors] Reference

An “oops!” with a nuke even if it stays subcritical is a public issue of concern.    From Wordnik.com.  [The Volokh Conspiracy » Another good night for the Second Amendment] Reference

By 1998 a subcritical testing arms race between the U.S. and Russia was well underway.    From Wordnik.com.  [Going subcritical: a nuclear test is a nuclear test is a nuclear test] Reference

OpEdNews - Article: Going subcritical: a nuclear test is a nuclear test is a nuclear test.    From Wordnik.com.  [Going subcritical: a nuclear test is a nuclear test is a nuclear test] Reference

It is not impossible for the plutonium waste of subcritical tests to leach into the groundwater.    From Wordnik.com.  [Going subcritical: a nuclear test is a nuclear test is a nuclear test] Reference

Nuclear power, from uranium, thorium/uranium and or subcritical thorium are all easily implemented.    From Wordnik.com.  [Today's Video: Like None Other - Restored Moon Images to Help Future Moon Missions - NASA Watch] Reference

Like underground nuclear tests, subcritical tests have a legacy of contamination that is stored underground.    From Wordnik.com.  [Going subcritical: a nuclear test is a nuclear test is a nuclear test] Reference

The main part of the core is subcritical with Th/233U oxide, mixed so that the system is self-sustaining in 233U.    From Wordnik.com.  [Thorium] Reference

While North Korea's "neuclear" tests are bad, our subcritical and simulated (Divine Strake) nuclear tests are good.    From Wordnik.com.  [GI Joe vs Albert Schweitzer] Reference

We conduct our subcritical "neuclear" tests beneath the loose floorboard in order to "keep us strong" from the bad guys.    From Wordnik.com.  [GI Joe vs Albert Schweitzer] Reference

Conversely, if you for some reason could not construct such a rep, you would be unable to quantize the subcritical string.    From Wordnik.com.  [Two cheers for string theory] Reference

Five years later, in 1997, the DOE began a program of subcritical testing at the test site that has continued on through today.    From Wordnik.com.  [Going subcritical: a nuclear test is a nuclear test is a nuclear test] Reference

ADSs are seen as safer than normal fission reactors because they are subcritical and stop when the input current is switched off.    From Wordnik.com.  [Accelerator-driven nuclear energy] Reference

Now, when you quantize the free, subcritical string, you automatically construct a non-trivial, unitary rep of the Virasoro algebra.    From Wordnik.com.  [Two cheers for string theory] Reference

The subcritical free string has a conformal gauge anomaly, but can nevertheless be quantized with a ghost-free spectrum (no-ghost theorem).    From Wordnik.com.  [String Theory is Losing the Public Debate] Reference

Conventional (subcritical) coal-fired power plants.    From Wordnik.com.  [Citizendium, the Citizens' Compendium - Recent changes [en]] Reference

DOE has announced that two subcritical tests at about ACW.    From Wordnik.com.  [ArmsControlWonk] Reference

I suppose it would blow one subcritical mass into another.    From Wordnik.com.  [The Cosmic Computer] Reference

The US has even made available video of one of its subcritical tests.    From Wordnik.com.  [ArmsControlWonk] Reference

"And you can do that with only one of the two, in the subcritical case".    From Wordnik.com.  [WebWire | Recent Headlines] Reference

Thanks to that disaster, we now have single rod subcritical withdrawl criteria.    From Wordnik.com.  [Popular Science - New Technology, Science News, The Future Now] Reference

The subcritical tests may have occurred in the tunnel leading from the new adit.    From Wordnik.com.  [ArmsControlWonk] Reference

We think that that's affecting our subcritical plants, but not the supercriticals.    From Wordnik.com.  [SeekingAlpha.com: Home Page] Reference

This is persuasive, though not conclusive, evidence that the testing was subcritical.    From Wordnik.com.  [ArmsControlWonk] Reference

Conventional (subcritical) coal-fired power plants typically achieve 34-36\% efficiency.    From Wordnik.com.  [Citizendium, the Citizens' Compendium - Recent changes [en]] Reference

Of course, it is also perfectly reasonable to conduct a subcritical test at a test site.    From Wordnik.com.  [ArmsControlWonk] Reference

Whether the UK has admitted to subcritical testing, the US has admitted it on their behalf.    From Wordnik.com.  [ArmsControlWonk] Reference

"Experiments" have no perceptible nuclear yield (i.e. remain subcritical) and are permitted.    From Wordnik.com.  [ArmsControlWonk] Reference