However, it is not known if any of this results from fission chain reactions.

A sustained fission chain is necessary to generate nuclear power.

It is based on the idea of a fission chain reaction moving through a core in a "wave".

These are materials that sustain an explosive fast nuclear fission chain reaction.

Producing a fission chain reaction in natural uranium fuel was found to be far from trivial.

That or a method of initiating a fission chain reaction in stable atoms.

The insertion of a single blade was sufficient to shut down the fission chain reaction.

To be a useful fuel for nuclear fission chain reactions, the material must:

The idea of a self-sustaining fission chain reaction producing a very large amount of energy was born.

However, if a sufficient quantity of uranium-235 could be isolated, it would allow for a fast neutron fission chain reaction.

This is high enough to permit a sustained nuclear fission chain reaction to occur, provided other supporting conditions exist.

Nuclear reactors operate and produce power by maintaining a nuclear fission chain reaction.

Such a chain is a self-sustaining fission chain reaction.

Large-scale natural uranium fission chain reactions, moderated by normal water, had occurred far in the past and would not be possible now.

At any time, the fission chain can be promptly terminated by the action of two diverse, redundant and independent shutdown systems.

In addition to laser enrichment, the university carried out a test on neutron generator that can also trigger the fission chain reaction.

Criticality: The normal operating condition of a reactor, in which nuclear fuel sustains a fission chain reaction.

Inside all kinds of operating reactors a fission chain reaction occurs in the fuel rods, as described in 3.1.

The detonation seemed almost soundless, but the percussion of the fission chain reaction shook the mountain to its core.

Some of them produce neutrons, called delayed neutrons, which contribute to the fission chain reaction.

In a nuclear reactor the uranium fuel is assembled in such a way that a controlled fission chain reaction can be achieved.

A fission chain reaction.

In practice, sustaining a fission chain reaction with fast neutrons means using relatively highly enriched uranium or plutonium.

Be in the region of the binding energy curve where a fission chain reaction is possible (i.e., above radium)

Fission chain reactions occur because of interactions between neutrons and fissile isotopes (such as U).