𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The theory of irradiation creep in reactor graphite—The dislocation pinning-unpinning model

✍ Scribed by B.T. Kelly; A.J.E. Foreman

Publisher
Elsevier Science
Year
1974
Tongue
English
Weight
645 KB
Volume
12
Category
Article
ISSN
0008-6223

No coin nor oath required. For personal study only.

✦ Synopsis

The theory of creep of a graphite crystal under fast neutron irradiation is developed assuming that it occurs by basal slip activated by fast neutron induced atomic displacements. The basal slip rate is calculated for dislocations gliding through an arra\ of pinning points which are both created and destroyed by irradiation. It is shown that the parameters necessary for this theory to fit experiment are quite compatible with changes in other properties of crystallites under irradiation in the same conditions.

📜 SIMILAR VOLUMES

172. Theory of irradiation creep in reac
172. Theory of irradiation creep in reactor graphite — the dislocation pinning-unpinning model
✍ B.T Kelly; A.J Foreman 📂 Article 📅 1973 🏛 Elsevier Science 🌐 English ⚖ 133 KB

part of a joint (Dragon/KFA/Euratom/RCN) irradiation programme in the HFR Petten, The Netherlands, extensive data were obtained on the irradiation behaviour at 8 temperature levels between 400 and 1400°C of 10 different Gilsocarbon graphites. A computer technique was used to systematize and compare

The irradiation creep in reactor graphit
The irradiation creep in reactor graphites for HTR applications
✍ H.J. Veringa; R. Blackstone 📂 Article 📅 1976 🏛 Elsevier Science 🌐 English ⚖ 783 KB

Ahstraet-For the design of the core of a High Temperature Reactor, reliable data on the radiation induced plasticity of reactor graphite are necessary. This paper describes a series of restrained skrinkage experiments on a number of graphites in the temperature range 400-1400°C. A description is giv

The analysis of irradiation creep experi
The analysis of irradiation creep experiments on nuclear reactor graphite
✍ B.T. Kelly; T.D. Burchell 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 558 KB

The phenomenon of irradiation creep in graphite is essential to the design and construction of graphite-moderated reactors. Recent experimental results have shown large apparent reductions in creep rate for creep strains greater than ?I'%. It is shown that this is not a true reduction in creep rate,

Some estimates of the irradiation creep
Some estimates of the irradiation creep constant of pyrocarbon contained in the coatings of reactor fuel particles
✍ S.N Buckley; S.A Manthorpe; D.G Martin 📂 Article 📅 1975 🏛 Elsevier Science 🌐 English ⚖ 131 KB

The characterization of property changes in various grades of near-isotropic, "binderless" grades of graphite as functions of fluence accumulated at 715°C from 0 to 42 x 10" neutrons/cm' (E > 50 keV) was made. Generally, the average coefficients of thermal expansion (CTE) from 20 to 600°C and the ro

The application of chemical rate theory
The application of chemical rate theory to fast neutron irradiation damage in graphite
✍ B.T. Kelly 📂 Article 📅 1976 🏛 Elsevier Science 🌐 English ⚖ 712 KB

A simple chemical rate theory of irradiation damage in graphite is developed. The equations relate the concentration of various types of lattice defect as a function of irradiation temperature, crystallite size and atomic displacement rate. Numerical values are proposed for the parameters and the pr