Sentences with phrase «of reactor coolant»

The slow up - flow of water in the reactor vessel insures that little radioactive crud produced from long term operation carries to the above - ground portion of the reactor coolant system.

Not exact matches

Under the reactor was a huge pool of water — coolant for the power plant.

Corrosion of oxide dispersion strengthened iron - chromium steels and tantalum in fluoride salt coolant: An in situ compatibility study for fusion and fusion - fission hybrid reactor concepts

The accident could have blocked the flow of coolant gas and caused the fuel in one of the reactor's 6156 channels to melt and leak radioactivity, but it was 9 hours before Nuclear Electric decided to shut down the reactor.

It notes that a storage facility that could hold spent fuel for several decades while it cools could free up space in reactors» pools, lowering the risk of overheating, loss of coolant, and fires.

In the case of the Olkiluoto 3 EPR, he notes that safety engineers designed a reactor with more pumps and valves to prevent the loss of any coolant, «but there wasn't as much effort into designing for construction,» which is driving the overruns.

«The reactor vessel head could have failed between two and 14 months further out, that would have been a major loss - of - coolant accident,» says NRC spokesman Scott Burnell.

At about 4 A.M. local time, the main pumps feeding cooling water into Unit 2 failed and, due to confusion amidst the klaxon of alarms and flashing warning lights, the men operating the reactor made the situation worse when they mistakenly thought there was too much water in the core and shut off emergency pumps, thereby reducing further the amount of coolant reaching the reactor.

Major features of SMR - 160 include its small footprint (4.5 acres), minuscule site boundary dose, large inventory of coolant in the reactor vessel and its modularity — allowing project owners the freedom to effectively build the number of units to meet current and future demand.

The NuScale Power Module ™ and power plant design enhances the intrinsic physical protection and security of the plant through the elegantly simple design, elimination of large break loss of coolant accidents, and full reliance on passive systems to cool the reactors and spent fuel for extended periods without the need for AC power, DC power or additional water following an upset condition.

The low power output of each NuScale Power Module allows for significant design simplification and elimination of many systems susceptible to sabotage, including the reactor coolant loops, reactor coolant pumps, and active safety systems.

Since the PRISM reactor is designed to operate between 640 F — 905 F, the properties of sodium make it an excellent coolant.

The slow upward flow of water insures that the short lived radioactive gases produced by fission die off before the reactor coolant reaches the above - ground portion of the plant (another bonus of gravity driven flow!).

The unit's reactor coolant loop pipe welding and the setting of other key equipment have also been completed, the Emirates Nuclear Energy Corporation (Enec) said yesterday.

This coolant allows the neutrons in the reactor to have a higher energy that drive fission of the transuranics.

Tritium is produced primarily from neutron capture by B - 10 in PWRs; that B - 10 (in the form of boric acid) is added to reactor coolant systems as a soluble reactivity agent.

Unlike the current generation of light - water nuclear reactors, PRISM uses metallic fuel, such as an alloy of zirconium, uranium, and plutonium, and PRISM's fuel rods sit in a bath of a liquid metal — sodium — at atmospheric pressure, which ensures that the transfer of heat from the metal fuel to the liquid sodium coolant is extremely efficient.

PRISM's coolant, liquid sodium, allows the neutrons in the reactor to remain at a higher energy (or speed, hence the common reference of «fast reactor»).

Thus, liquid sodium is the coolant of choice in fast reactors because it can effectively transfer heat away from the nuclear fuel, while at the same time maximizing the number of fast neutrons.

Considering the condensing ability of the steam generators, water inventory in the HA - 2 tanks was chosen so that coolant inventory essential for reliable cooling of fuel can be maintained in the reactor vessel for 24 - 280 hours (depending on leak size).

This means that such a reactor could not suffer from a loss of coolant leading to a meltdown.

«What it does is it takes different sorts of fuel materials such as plutonium or used nuclear fuel, it casts that into a metallic fuel, it puts it in a reactor that has liquid sodium as a coolant — and if you have liquid sodium as a coolant then the energies of the neutrons are higher so you can use a different fuel source.

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

Using a high pressure coolant in a nuclear reactor is not a good idea and lends itself to a number of accident scenarios.

Types of Reactors Pressurized Water Reactor (PWR) Water moderator & coolant Gas Cooled Reactor Graphite moderator & Carbon Dioxide gas coolant