Heat transfer in pebble beds for fusion blankets

Journal Article · Sun Jul 01 04:00:00 EDT 1990 · Fusion Technology; (USA)

OSTI ID:6570861

Donne, M D ^[1]; Sordon, G ^[2]

---

1. Kernforschungszentrum Karlsruhe GmbH (Germany, F.R.)
2. Joint Research Centre Petten, P.O. Box 2, 1755 ZG Petten (NL)

The design of a fusion reactor blanket based on a bed of lithium-containing ceramic pebbles or a mixture of ceramic and metallic pebbles requires knowledge of the effective thermal conductivity of such beds. Binary mixtures of spheres with the same diameter but different conductivities as well as beds formed by one type of sphere are investigated. The pebbles are made of Al{sub 2}O{sub 3} (diameter = 1, 2, and 4 mm), Li{sub 4}SiO{sub 4} (diameter = 0.5 mm), aluminum (diameter = 2 mm), and steel (diameter = 2 and 4 mm). The experimental apparatus consists of a stainless steel cylinder with a heating rod along the symmetry axis. The pebble bed is contained in the annular space between the two concentric cylinders. Experiments with stagnant and flowing gas are performed. The experimental values of the effective thermal conductivity and the wall heat transfer coefficient are compared with those predicted by correlations available from the literature. On the basis of the present experimental results, modifications of the existing models are suggested.

• OSTI ID: 6570861
• Journal Information: Fusion Technology; (USA), Journal Name: Fusion Technology; (USA) Vol. 17:4; ISSN 0748-1896; ISSN FUSTE
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700201* -- Fusion Power Plant Technology-- Blanket Engineering
700209 -- Fusion Power Plant Technology-- Component Development & Materials Testing
ALKALI METALS
ALLOYS
BINARY MIXTURES
BREEDING BLANKETS
CERAMICS
DESIGN
DISPERSIONS
ELEMENTS
ENERGY TRANSFER
GAS COOLED REACTORS
HEAT TRANSFER
HIGH ALLOY STEELS
HOMOGENEOUS REACTORS
IRON ALLOYS
IRON BASE ALLOYS
LITHIUM
METALS
MIXTURES
PEBBLE BED REACTORS
PHYSICAL PROPERTIES
REACTOR COMPONENTS
REACTORS
SOLID HOMOGENEOUS REACTORS
STAINLESS STEELS
STEELS
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
THERMONUCLEAR REACTORS