Title:
METALLIC BERYLLIUM PEBBLE
Document Type and Number:
Japanese Patent JP2607338
Kind Code:
B2
Abstract:
PURPOSE: To provide a metallic beryllium pebble enhanced in tritium breeding ratio, which is hardly bridged when filled in a closed vessel and with the generation of a cavity liable to form a hot spot reduced in the closed vessel to prevent the local overheating.
CONSTITUTION: This metallic beryllium pebble 16 has 0.1-5mm average grain diameter, 0.001-0.05mm sphericity and 0.1-0.4μm surface roughness Ra, Since the pebble has the relatively small average grain diameter, relatively high sphericity and relatively low surface roughness, the pebbles are easily filled in a closed vessel, the pebbles are not bridged, and the filling factor in the closed vessel is increased. Consequently, as a large cavity is not locally formed in the closed vessel packed with the pebbles, the generation of a hot spot is reduced, and local overheating is prevented.
Inventors:
Nishida Seri
Naoki Sakamoto
Naoki Sakamoto
Application Number:
JP1755493A
Publication Date:
May 07, 1997
Filing Date:
February 04, 1993
Export Citation:
Assignee:
Nippon Insulator Co., Ltd.
International Classes:
B22F1/00; C22B26/20; G21B1/13; (IPC1-7): B22F1/00; C22B26/20
Attorney, Agent or Firm:
Hattori Masaki
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