Sentences with phrase «reactor core»

When auxiliary batteries were exhausted, the plant was without power to continue cooling reactor cores and spent fuel pools.

Specifically it covers particle interaction with the metals and alloys used in nuclear reactor cores and hence subject to intense radiation fields.

Without a steady coolant supply, a hot reactor core will continuously boil off the water surrounding it until the fuel is no longer immersed.

The head of the Russian delegation showed a film shot from a helicopter, and we suddenly found ourselves gazing down on the red - hot exposed reactor core.

A government might use the Internet to get information about another country's nuclear reactor core, for example.

The problem of spent fuel storage Nuclear reactor operators must store spent fuel removed from reactor cores for several years at least, in large pools at reactor sites until the remaining heat from the uranium fuel cools sufficiently.

The measurement of the antineutrino spectrum can be used to monitor the status, performance and even composition of reactor cores.

In a thermal reactor, the neutrons, which are born fast, are slowed (or moderated) by interactions with nearby low - atomicweight atoms, such as the hydrogen in the water that flows through reactor cores.

The top U.S. nuclear regulator, Gregory Jaczko, gave a dire assessment of Japan's nuclear crisis yesterday, saying that lethal radiation from uncovered spent fuel above one of the reactors could force emergency workers to abandon their fight to prevent meltdowns of damaged reactor cores at the Fukushima Daiichi plant.

Samus faced off against the grotesque creature who fell into the ship's reactor core upon defeat, causing it to explode.

Comparing the ITER and the core of a comparable commercial fission reactor shows an enormous difference in size — a factor of 5 - 10 — ITER being huge by comparison to a fission reactor core.

The other contains a one - metre - wide model of the spherical reactor core, studded with 14 pistons like a pincushion.

«They still went into a pitch black, badly damaged basement beneath a molten reactor core that was slowly burning its way down to them,» he said.

NASA's prototype power system uses a uranium - 235 reactor core described as roughly the size of a paper towel roll.

A Chernobyl can not happen here — a survey by the Nuclear Regulatory Commission (NRC) established that our reactors are free of the design flaws that permitted Chernobyl to explode, and in the United States a typical reactor core is surrounded by multiple enclosures to block the escape of radioactive material even in the event of an accident.

He encased his makeshift reactor core in foil - wrapped cubes of radioactive thorium, 9,000 times purer than what is normally found in nature, which he had made using lithium batteries and thorium dioxide from gas - lantern mantles.

The entire reactor core — all 548 assemblies — was in the spent fuel pool, and was hotter than fuel in the other pools.

The inspections identified U.S. plants where fire equipment to be used for emergency reactor core cooling was not protected against earthquakes, for example, or where crucial reactor electrical controls could be knocked out by flooding.

The irradiation rig is intended to accumulate fission molybdenum - 99 in the RBT - type reactor core.

The ZED - 2 core can be arranged into a wide range of configurations to validate reactor core models with empirical data.

If a sodium cooled reactor core loses it coolant by a leak or boiling, voiding within the core causes a sudden increase in reactor power which could damage the fuel and core.

ARC's ARC - 100 modular 100 MWe model would use a «novel» metal alloy fuel, with the uranium - fuelled reactor core submerged in a tank of liquid sodium at ambient pressure.

Probably the cheapest method of doing it would be by heating deep ocean water to make it rise rather than pumping e.g. by dumping thousands of unshielded breeder reactor cores off the side of a ship.

These reactors were studied in the 1960s; at Oak Ridge, researchers built the Molten Salt Reactor, which had a liquid reactor core.

China would have been more than eager build a Thorium232 based commercial reactor core instead of the Uranium / Plutonium MOX type for both Iran and North Korea.

In the three - phase mode, rebel pilots attempt to destroy Imperial defenses before eliminating shield projectors and eventually destroying a central reactor core.

Slides also describe the roles of control rods, moderator and coolant in nuclear reactor cores.

Eyeballing ITER compared to a fission reactor core, it's obvious that an ITER - like machine is many times more massive.

In early May, Unit 4's reactor core was still melting down.

Because cnn and fox aren't reporting how one of the reactor cores liquified 100 % - something never seen in the history of nuclear power.

Baffle bolts hold in place baffle plates, which channel cooling water to the reactor core.

However, the power plant needs a permit from New York State to use Hudson River water to cool its reactor cores.

«The Indian Point nuclear power plant, which sits within two miles of two intersecting fault lines has the highest risk of an earthquake causing its reactors core damage in the United States,» Carlucci said in a statement.

``... Indian Point has had an abysmal history of emergency shutdown, radioactive leaks, equipment failures, transformer explosions, degraded bolts inside the reactor core, and other problems.»

The VHTR, which is still in the planning stage, has a reactor core made of graphite, a substance that remains strong and stable even at high temperatures.

The Science Behind It Conventional nuclear power plants circulate water through a reactor core, where it is heated and then passed via pipes to larger vessels, where it converts to steam.

There are some 50 modular designs being developed globally, and while many are traditional light water reactors, which use water to cool the reactor core, others gain efficiency by using coolants such as gas, which allow reactors to reach higher temperatures.

This is the case because even when fission is stopped by driving neutron - absorbing control rods into a reactor core, radioactivity still warms the fuel rods.

The theory that makes artificial transmutation so attractive is that by including some actinide waste in a reactor core, neutrons generated by the fission of the uranium and plutonium fuel will transmute the waste to shorter - lived elements.

If the rest of the reactor is operating normally, pumps will continue to circulate coolant (usually water) to carry away the reactor core's heat.

The Japanese plant's operators have made a number of attempts to cool the reactors, including pumping seawater into the reactor core to replenish the dwindling cooling fluid.

At that Pennsylvania nuclear station in 1979 a cooling malfunction combined with worker error led to a partial meltdown — about half of the reactor core melted and formed a radioactive puddle at the bottom of the steel pressure vessel.

So the reactor core continues to produce heat in the absence of fissioning.

When the reactor malfunctions or when operators need to shut off the reactor for any other reason technicians can remotely plunge control rods into the reactor core to soak up neutrons and shut down the nuclear reaction.

That hydrogen can then be released from the reactor core and containment vessel and, if it accumulates in sufficient quantities — concentrations of 4 percent or more in the air — it can explode, as has apparently occurred at reactors No. 1 and 3, and possibly No. 2 as well.

If such cooling is not continued, a full meltdown could occur in which the uranium fuel pellets escape the cladding and form a molten pool in the reactor core — potentially melting through the thick steel containment vessel.

It is the only one of the six reactor units at the site with suspected damage to the reactor core.