Chromium Carbide Feeder Pipe
Chromium Carbide Feeder pipe consists of a large number of fuel channels where heat is generated.
Two feeder pipes are connected to each fuel channel to transport coolant into and out of the reactor core.
Feeder piping stress analysis is being performed to demonstrate the code compliance check and the fitness for service of feeders.
In the past, stress analyses were conducted for each individual feeder without including interaction effects among connected feeders.
Interaction effects occur as a result of linkages that exist between feeders to prevent fretting and impacting damage during normal, abnormal and accident conditions. Both seismic time history and broadened response spectra methods were used in the seismic stress calculation.
The results show that the effect of linkages is significant in dynamic stresses for all feeder configurations, as well as in static stresses for certain feeder configurations.
- Higher chromium content in the chemical composition of wear-resistant layer
- Higher volume fraction of Cr7C3 carbide in metallographic structure
- Wear-resistant layer is high and uniform, hardness can reach HRC60-65
- Wear-resistant layer is uniform and the tolerance is controlled between 0 ~ 0.5 mm
- The flatness and flatness of the plate surface areat 3mm/M
- Wear resistance is muchhigher than heat treatment wear-resistant steel.