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Negative void reactivity in large FBRs with a hydrogeneous moderator

Conference · · Transactions of the American Nuclear Society; (United States)
OSTI ID:5817290
The positive reactivity at voiding coolant has long been the safety concern of large power fast breeder reactors (FBRs). The most well-known solutions are pancake or modular cores, or homogeneous addition of moderator in a core. Every one of these methods significantly diminishes the capital cost and the breeding ratio. In our previous design of the steam-cooled FBR, thin zirconium hydride layers were placed between the seed and axial blanket for reducing the void reactivity. The effectiveness of the layers is analyzed in this paper for realizing negative coolant void reactivity in the large-sized steam cooled FBR and liquid-metal-cooled FBR (LMFBR).
OSTI ID:
5817290
Report Number(s):
CONF-930601--
Conference Information:
Journal Name: Transactions of the American Nuclear Society; (United States) Journal Volume: 68
Country of Publication:
United States
Language:
English