The phrase "active fuel" is correct and usable in written English.
It can be used in contexts related to energy, combustion, or any situation where fuel is being actively utilized or consumed.
Example: "The engine requires active fuel to maintain optimal performance during operation."
Alternatives: "operational fuel" or "current fuel".
Then there's disposal of spent fuel, which is not contained at the same safety level as active fuel, itself a scary thought.
The spent fuel pools can be even more dangerous than the active fuel rods, as they are not contained in thick steel containers like the reactor core.
Although it is not a requirement, plant operators prefer having room in the cooling pool in case an emergency forces them to remove active fuel rods from the reactor core.
To further enhance power and efficiency, the engine has variable camshaft timing, which alters the opening and closing of the intake and exhaust valves for better flow control, and G.M.'s active fuel management system, which shuts down four cylinders when the engine is loafing, for better fuel economy.
Sometimes you need to tweak the propellor, the mixture, and the active fuel tank.
With few remaining test reactors, there is little opportunity for performing another test with a long active fuel column.
Both companies have had active fuel-cell development programs for decades — G.M. since the 1960s.
SIA has one of the industry's most active fuel-hedging programs (Southwest, again, is in this game); futures-market trades in jet fuel gave SIA an average cost for six months 16% below the spot price.
The Integral Fast Reactor-1 (IFR-1) experiment performed in the Fast Flux Test Facility (FFTF) was the only U Pu 10Zr (Pu-0, 8 and 19 wt.%) metallic fast reactor test with commercial-length (91.4-cm active fuel-column length) conducted to date.
While some authors have called for active fuels management within the range of spotted owls, concerns remain over potential effects of less intensive, but more extensive, fuel reduction activities (i.e., thinning and prescribed burning).
We modeled hypothetical herbivory effects under three disturbance regimes: (1) a natural disturbance regime without fire suppression, (2) a natural disturbance regime with only fire suppression, and (3) an active fuels management regime in which forest management was used to reduce probabilities of severe wildfires and in which wildfires were suppressed.
