This has a far higher spontaneous fission rate than plutonium-239.

The high spontaneous fission rate of californium-252 was observed in these samples.

Thus, when you draw off more power, the reactor automatically increases its fission rate to provide it.

If I increase the fission rate, Ill have to give her something to chew.

One more proposal which utilizes the high nuclear fission rate of Am is a nuclear battery.

Plutonium-240 has a high spontaneous fission rate, raising the overall background neutron level of the plutonium sample.

Control rods are used in nuclear reactors to control the fission rate of uranium and plutonium.

Critical--The point that a nuclear reactor's fission rate is constant without an external source of neutrons.

Reduce neutron population, reduce fission rate.

Population doubling times and mean individual lifespan fall in the range of 5 to 24 h, indicating that these field populations displayed near-maximal fission rates.

Im carrying the fission rate as high as I dare, Corley answered, strain in his voice.

Ciliophorans are capable of very high fission rates, but it is not known whether these rates are typical of field populations.

It has also been used extensively for nuclear weapons because it has a relatively low spontaneous fission rate and a low critical mass.

Spontaneous fission rates:

In the dependence on the atomic mass number, the yield showed a saw-tooth behavior with the lower values for odd isotopes, due to their higher fission rates.

They were less successful in terms of yield that was attributed to stronger losses of heavy isotopes due to enhanced fission rates in heavy-element charges.

The water replaces the liquid that's boiling off because of the fuel rods' residual radioactive decay heat, while the boric acid helps slow down the nuclear fission rate.

It is an α-emitter with a half-life of 20.47 days, a relatively weak γ-emission and small spontaneous fission rate as compared with the isotopes of californium.

To keep the probability of predetonation low, the duration of the non-optimal assembly period is minimized and fissile and other materials are used which have low spontaneous fission rates.

This has a far higher spontaneous fission rate and radioactivity than the cyclotron-produced plutonium on which the original measurements had been made, and its inclusion in reactor-bred plutonium appeared unavoidable.

Though as an α-emitter, Cm requires a much thinner radiation protection shielding, it has a high spontaneous fission rate, and thus the neutron and gamma radiation rate are relatively strong.

This turned out not to be the case, as the first tests on reactor-produced plutonium in early summer 1944 showed unacceptably high spontaneous fission rates due to the presence of plutonium-240, precluding the use of gun assembly.

This meant that the background fission rate of the plutonium was so high that it would be highly likely the plutonium would predetonate and blow itself apart in the initial forming of a critical mass.

Its development was aborted when it was discovered that the spontaneous fission rate of their nuclear-reactor-bred plutonium was too high for use in a gun-type design, due to the too high concentration of the isotope plutonium-240.

The low U density in natural uranium also implies that less of the fuel will be consumed before the fission rate drops too low to sustain criticality, because the ratio of U to fission products+U is lower.