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A reactor vessel head for a pressurized water reactor. This structure is attached to the top of the reactor vessel body. It contains penetrations to allow the control rod driving mechanism to attach to the control rods in the fuel assembly. The coolant level measurement probe also enters the vessel through the reactor vessel head.
Control rods are usually used in control rod assemblies (typically 20 rods for a commercial PWR assembly) and inserted into guide tubes within the fuel elements. Control rods often stand vertically within the core. In PWRs they are inserted from above, with the control rod drive mechanisms mounted on the reactor pressure vessel head. In BWRs ...
The TRICO II reactor is subject to yearly IAEA inspections. [7] In 1988 IAEA started a project to deliver replacement parts and new nuclear fuel. Because the American company General Dynamics Corporation, which had been contracted to deliver these parts, was unable to fulfil its obligations due to an embargo imposed on the Mobutu government. [1]
The reactor head under inspection. Unit One is an 879 MWe pressurized water reactor supplied by Babcock & Wilcox. The reactor was shut down from 2002 until early 2004 for safety repairs and upgrades. In 2012 the reactor supplied 7101.700 GWh of electricity. [14]
The reactor unit is coupled to direct-drive helium closed-cycle gas turbine which drives a generator to produce electricity. The nuclear core design is based upon a new conversion technique in which an initial "starter" section of the core provides the neutrons to convert fertile material (used nuclear fuel, thorium, or depleted uranium ) into ...
S2C reactor. USS Tullibee (SSN-597) S2G reactor. USS Seawolf (SSN-575) S2W reactor. USS Nautilus (SSN-571) S2Wa reactor. replacement reactor for USS Seawolf (SSN-575) S3G reactor. land-based prototype for USS Triton (SSN-586); located at Kesselring site; S3W reactor. USS Skate (SSN-578) USS Sargo (SSN-583) USS Halibut (SSGN-587) S4G reactor
2: reactor cover [10] or vessel head [11] 3: Reactor pressure vessel 4: inlet and outlet nozzles 5: reactor core barrel or core shroud 6: reactor core 7: fuel rods The arrangement of hexagonal fuel assemblies compared to a Westinghouse PWR design. Note that there are 163 assemblies on this hexagonal arrangement and 193 on the Westinghouse ...
In commercial power plants, there are two to four steam generators per reactor; each steam generator can measure up to 70 feet (21 m) in height and weigh as much as 800 tons. Each steam generator can contain anywhere from 3,000 to 16,000 tubes, each about .75 inches (19 mm) in diameter.