Surface diffusion of plutonium on uranium dioxide

Journal Article · Sun Feb 01 04:00:00 EST 1976 · Nucl. Technol., v. 28, no. 2, pp. 226-234

OSTI ID:4037361

Furuya, H; Koizumi, M

The surface diffusion of plutonium on uranium dioxide was measured from 1400 to 1830$sup 0$C using a tracer method. A (U,Pu)O$sub 2$ point source was placed and heated on the polished surface of a UO$sub 2$ diffusion pellet. In the low-temperature range from 1400 to 1670$sup 0$C, the product of the surface diffusion coefficient and high diffusivity surface layer, D/sub s/ . delta, was expressed by the equation D/sub s/ . delta = 4.33 x 10$sup -4$ exp (-68,000/RT) cm$sup 3$/s (1400 to 1670$sup 0$C). As the temperature of diffusion anneal increases, transport of some tracer atoms from the point source to the pellet surface appeared. In the temperature range from 1640 to 1830$sup 0$C, the product, D/sub s/ . delta, was expressed by the equation D/sub s/ . delta = 2.95 x 10$sup 8$ exp (-172,000/RT) cm$sup 3$/s (1640 to 1830$sup 0$C). (auth)

• Research Organization: Power Reactor and Nuclear Fuel Development Corp., Tokai-mura, Japan
• NSA Number: NSA-33-030034
• OSTI ID: 4037361
• Journal Information: Nucl. Technol., v. 28, no. 2, pp. 226-234, Journal Name: Nucl. Technol., v. 28, no. 2, pp. 226-234; ISSN NUTYB
• Country of Publication: United States
• Language: English

Related Subjects

*PLUTONIUM-- DIFFUSION
*URANIUM DIOXIDE-- PERMEABILITY
360204* --Materials--Ceramics
Cermets & Refractories-- Physical Properties
N50130* --Metals
Ceramics
& Other Materials--Ceramics & Cermets--Properties
Structure & Phase Studies
SURFACES