Research Article
Conceptual Study on Recriticality Prevention Core Having Duplex Pellets with Neutron Absorber in Outer Core in a Fast Reactor
Table 1
Core specifications of normal core and the core having Duplex pellets with neutron absorber.
| Item | Normal core without Duplex pellets | Core having Duplex pellets with neutron absorber in the outer core fuel |
| Reactor power (MWt) | 3600 | 3600 | Core height (cm) | 80 | 80 | Number of assemblies in inner/outer core | 316/278 | 316/278 | Assembly pitch | 183.2 | 183.2 | Diameter of fuel pin | 8.8 | 8.8 | Pu contents (wt%) in inner/outer core | 18.3/22.9 | 18.3/22.9 | Number of fuel pins in an assembly | 271 | 271 | Thickness of wrapper tube (mm) | 5 | 5 | Neutron absorber material in Duplex pellet | - | Gd2O3 | Diameter of center hole in Duplex pellet (mm) | - | 1 | Location of assemblies with Duplex pellets | - | Outer core | Filling rate of neutron absorber material (%) | - | 60 |
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