Sentences with phrase «containment vessel»

The explosions at reactors No. 1 and 3 destroyed the surrounding buildings but have apparently not damaged the massive steel containment vessel — as much as 20 centimeters thick — that surrounds each reactor's nuclear core.

Two snakelike robots crawled through a pipe leading into the 48 - meter - tall primary containment vessel in the Unit 1 reactor to ascertain the state of melted fuel masses.

NuScale's self - contained SMR houses the reactor core, pressuriser and steam generator inside a single containment vessel.

Using robotic probes and 3 - D imaging with muons (a type of subatomic particle), workers have found pebbly deposits and debris at various areas inside the primary containment vessels in the three of the plant's reactor units.

Natural air flow around the lower containment vessel is all that is needed to keep the reactor fuel cool at all times.

Okedele hinted that as of October 30, 2015, the Japan Times «reported that Tokyo Electric power Company (TEPCO) has detected high level Radiation at 9.4 Sieverts outside Reactor containment Vessel # 2.

In the event of an increased core temperature or a power failure, the hot liquid salt melts a plug at the bottom of the reactor and drains into passively cooled containment vessels, limiting the risk of radiation release into the environment.

Units 1 and 3 have experienced explosions that destroyed exterior walls, apparently from buildups of hydrogen gas produced by the zirconium in the fuel rods reacting with coolant water at extremely high temperatures — but the interior containment vessels there thus far seem to be intact.

SRIC also strongly believes that much more information is needed to determine many things, including how much contamination is in the inner containment vessel (ICV), whether there was a problem in how the drums were prepared or loaded into the ICV at INEEL, whether the accident before the shipment arrived at WIPP contributed to the situation.

The NuScale containment vessel has a design pressure that is roughly 10 times higher than traditional plants.

And because it's buried underground, it's relatively terrorism proof and doesn't need a thick, heavy containment vessel.

This hazardous waste is carefully contained but sometimes seeps through containment vessels and pollutes the ground - water, air or vegetation surrounding it.

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.

The NuScale Power Module design is comprised of an integrated reactor vessel, steam generator, and containment vessel in a single cylindrical module.

High - pressure containment vessel, redundant passive decay heat removal, and containment heat removal systems.

NuScale's self - contained SMR design houses the reactor core, pressuriser and steam generator inside a single containment vessel.

Unlike most other reactors, air flowing naturally around the lower containment vessel is all that is needed to keep the reactor fuel cool at all times.

Tri Alpha, a company in southern California, is hoping their method of spinning magnetized plasma inside a containment vessel will be a lower - cost method of power generation than ITER.

Theoretically, this configuration would prevent fuel from overheating and breaching the reactor's containment vessel.

TEPCO modeling and analyses suggest that most, if not all, of the fuel in the Unit 1 reactor melted, burned through the reactor pressure vessel, dropped to the bottom of the containment vessel, and perhaps ate into the concrete base.

That work has been postponed because TEPCO decided to first send a robot into the containment vessel; high radiation levels have delayed that plan.

Pressure in the suppression pool — a doughnut - shaped water vessel below the reactor — dropped after the explosion, indicating that the containment vessel had been compromised.

In a worst - case meltdown scenario the puddle of hot fuel could melt through the steel containment vessel and through subsequent barriers meant to contain the nuclear material, exposing massive quantities of radioactivity to the outside world.

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 the molten pool melts through the steel containment vessel, large amounts of radiation would be released into the environment.

The next day, engineers began pumping water and boron into the containment vessel to cool down the fuel.

«They're venting in order to keep the containment vessel from failing.

If the fuel does melt, it won't explode, but will need to be sealed forever, probably at the base of the containment vessel.

But if the core does melt, that insult will probably not be sustained and the containment vessel will fail.

However, the International Atomic Energy Agency is concerned that the containment vessel itself may also have been damaged.

As in the other units, there was said to be no damage to the containment vessel.

One new feature, for example, is a 2.8 - million - liter (750,000 - gallon) water tank on top of the containment vessel surrounding the core that would use gravity in the case of emergency to send water flowing over the core, cooling it to prevent a meltdown.

«If the Japanese fail to keep the reactors cool and fail to keep the pressure in the containment vessels at an appropriate level, you can get this, you know, the dramatic word «meltdown.»

At that point, the uranium pellets would fall to the bottom of the containment vessel and continue to overheat, potentially melting through the steel vessel itself eventually.

Because the AP1000 design uses a chimney effect to draw air outside of the containment vessel upward (a design Westinghouse envisioned for cooling the containment and preventing rust using natural circulation), if radioactive air were to seep from the steel vessel, it would be ushered up into the outside air through the hole in the shield building roof.

The solution, Gundersen says, is to install filters in the hole of the shield building's roof to capture any vapors that could leak out of the containment vessel, if breached.

Arnie Gundersen, a former nuclear industry executive and chief engineer of Fairewinds Associates, an energy consulting company, stepped forward to spotlight what he sees as a possible fatal flaw in the AP1000's design: the separation of the concrete shield building from the steel containment vessel.

With the AP1000, there is a space between the steel containment vessel and the shield building, the latter of which has a hole in its roof.

The hollow morphology of the tyrannosaur femur supported the general idea that an exceptionally well - preserved bone may act as a containment vessel for biomolecules.

State of the PlantFrom the water temperature in the containment vessels and the spent fuel pools (SFPs), and from the state of releases of Xenon - 135, released when uranium fuel undergoes fission, and other measurements,...

NuScale's design incorporates seven layers of defense to prevent the release of contamination into the environment, including: 1) oxide fuel pellet and cladding; 2) reactor vessel; 3) containment vessel; 4) reactor pool; 5) underground stainless steel lined concrete pool walls and floor; 6) biological shield; and 7) a Seismic Category 1 building with HVAC filtration.

As can be shown in the diagram, the primary liquid sodium system is located within the containment vessel.

In addition, the containment vessel is surrounded by a 6 foot thick steel & concrete structure known as the Containment Enclosure Structure.

However, reinforcement of the walls would have narrowed the space between the containment vessel and the wall of the containment building.

These systems employ blocks of ice in a basket installed around the containment vessel to rapidly cool steam generated to reduce pressure in the event of an accident.