SEDL / STP / STP484-EB / STP26627S


The Temperature and Neutron Dose Dependence of Irradiation Growth in Zircaloy 2

Harbottle, JE
Berkeley Nuclear Laboratories, Berkeley, Gloucestershire


Pages: 11    Published: Jan 1970


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Abstract

Irradiation growth due to fast neutron bombardment has been measured in textured Zircaloy 2 as a function of neutron dose (ϕt) and irradiation temperature. The growth strain ε obeys a relationship ε∝ (ϕt)n over a temperature range -196 to 280 C and for doses up to 1021 n/cm2. For irradiation temperatures up to 80 C, n = 0.4; but at 280 C, n = 0.7. The temperature dependence of irradiation growth in Zircaloy 2 is small, and in the temperature and dose ranges considered the growth strains do not differ by more than a factor of four. The growth rate G∝d ε/d (ϕt) is initially large at low doses but approaches 1 at high doses (∼;1021 n/cm2).


Keywords:
irradiation, neutron irradiation, neutron flux density, temperature, strains, strain rate, crystal lattices, grain structure, interstitials, volume, Zircaloys, nuclear reactor materials, pressurized water reactors, texture, elongation, pressure vessels

Paper ID: STP26627S
Committee/Subcommittee: E10.07
DOI: 10.1520/STP26627S
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