Thank you very much for providing so much useful information and document.Astronuc said:The following article contains some data, e.g., density of Sb and Be, and SS, but unfortunately the design is for a 16x16 OP-1400 fuel design (similar to CE System 80).
http://www.sciencedirect.com/science/article/pii/S1738573316300572
Typically there are 4 source rods per assembly in two assemblies, or sometimes four assemblies.
For a typical 17x17 core, with a core height of 3.66 m, there is a diagram of an Sb-Be secondary source here
http://www.pnl.gov/main/publications/external/technical_reports/PNNL-19151.pdf.
The length of Sb-Be is 88 inches (223.5 cm). The stainless steel (SS 304 or 316) cladding outer diameter is approximately 0.968 cm, and the wall thickness is approximately 0.057 cm. It's possible that a longer Sb-Be would be used for the 4.27 m core, e.g., 260 cm.
A secondary neutron source in a French PWR (pressurized water reactor) is a component that produces additional neutrons in the reactor core. These neutrons are used to sustain the nuclear chain reaction and generate heat for electricity production.
The secondary neutron source in a French PWR is typically made of beryllium or graphite material, which is bombarded by high-energy protons from the reactor's primary coolant. This process produces additional neutrons that are used to maintain the nuclear reaction and generate heat.
The secondary neutron source in a French PWR plays a crucial role in maintaining the nuclear reaction and ensuring a steady supply of heat for electricity production. It also helps to control the reactor's power output and maintain safe operation.
The secondary neutron source in a French PWR is controlled and monitored through a series of safety systems and procedures. These include regulating the flow of primary coolant, monitoring neutron flux levels, and using control rods to adjust the reactor's power output.
Like all components in a nuclear power plant, the secondary neutron source in a French PWR is subject to rigorous safety regulations and inspections. Proper maintenance and monitoring of the source are essential to ensure safe and efficient operation of the reactor. In the rare event of a malfunction, there are multiple safety systems in place to shut down the reactor and prevent any potential hazards.