Comparing the Neutronic Behavior of LR-0 Reactor During the First 20 Shakes from Startup When Controlled by Boron vs. Silver Control Rods | ||||
| Egyptian Journal of Radiation Sciences and Applications | ||||
| Volume 37, Issue 1, July 2024, Page 29-38 PDF (1.73 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejrsa.2024.232380.1160 | ||||
 View on SCiNiTO | ||||
| Author | ||||
Mahmoud Dorrah  
| ||||
| Egyptian Atomic Energy Authority | ||||
| Abstract | ||||
| Buildup of neutron flux in moderator and neutron absorption in control rods of LR-0 reactor, which is a mockup of the Russian PWR WWER-400 were investigated over the first 200 nano seconds from reactor startup when controlled by Boron only, Silver only, and mixed Boron & Silver control rods. Calculations were carried out using MCNP5 code. Three models of LR-0 reactor were studied. One model was controlled by Boron control rods only, another model were controlled by Silver control rods only, and a third model was controlled by equal numbers of identical Boron and Silver control rods. In each model, the buildup of neutron flux in moderator, and the neutron absorption in control rods were tallied. Profile of change of neutron absorption in control rods with time was significantly different in the three models. However, neutron flux buildup in moderator was almost unaffected by the type of control rods. Also, energy spectrum of the absorbed neutrons in all models was almost the same, signifying that spectrum of absorbed neutrons in control rods is not dependent on the type of control rod material. | ||||
| Keywords | ||||
| Boron; Silver; Control Rods; neutron absorption; nanosecond | ||||
|
Statistics Article View: 146 PDF Download: 83 |
||||
