1 / 8

Nuclear Power Plant

Nuclear Power Plant. How A Nuclear Reactor Works. Pressurized Water Reactor - Nuclear Power Plant. A. Main Parts of a Nuclear Reactor. Fuel Pellets stacked in long metal tubes (fuel rods). These are arranged in bundles in the reactor with space between them for control rods. Moderator

gunne
Télécharger la présentation

Nuclear Power Plant

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Nuclear Power Plant How A Nuclear Reactor Works

  2. Pressurized Water Reactor - Nuclear Power Plant

  3. A. Main Parts of a Nuclear Reactor • Fuel • Pellets stacked in long metal tubes (fuel rods). These are arranged in bundles in the reactor with space between them for control rods. • Moderator • Slowsdown neutrons so they have a greater probability of colliding with another uraniumatom. Usually wateror graphite.

  4. A. Main Parts of a Nuclear Reactor (continued) 3. Control System • Controlrods are filled with substances that absorbneutrons (boron or cadmium). These help control the rate of the reaction. 4. Heat Removal System • The reactor must be cooled to prevent overheating and melting of the core. Heat is carried away by water and used for steam production. 5. Radiation Shield • Thermal (steel) shield protects the walls of the reactor vessel from radiation damage. A concrete shield protects the workers from radiation.

  5. B. Disposal Of Nuclear Waste When most usable uranium has fissioned, the “spent” fuel assembly is removed from the reactor. Until a long term storage facility is operational (Yucca Mountain, NV?), “spent” fuel is stored in water pools at the reactor site. Water removes leftover heat and serves as a radiation shield. Typical water pools for nuclear waste storage Underground disposal of radioactive waste (in Finland)

  6. C. Nuclear Meltdown Refers to melting fuel in a reactor when there is an inability to remove heat effectively. Causes include a loss of coolant in the system and/or failure of the reactor to shut down when faulty. If a meltdown does occur, a release of radiation occurs only if there is a major failure in the containment structure (pressure, fire, explosion).

  7. C. Nuclear Meltdown (continued) Chernobyl disaster • Ukraine (Soviet Union), 1986 • Worst nuclear power plant accident in history • 31 peopled during the accident itself, but more people suffered long-term effects like cancer and deformities

  8. C. Nuclear Meltdown (continued) • Fukushima • Japan, March 2011 • Occurred after the power plant was hit by a tsunami • Although no fatalities were reported after the incident, over 300,000 people had to evacuate the area

More Related