Г.В. Кулаков, А.В. Ватулин, Ю.В. Коновалов, А.А. Косауров, М.М. Перегуд и др.
12
Analysis of the stress-strain state effect of the zirconium al-
loy claddings on the distribution of hydrides
© G.V. Kulakov
1
, A.V. Vatulin
2
, Y.V. Konovalov
3
, A.A. Kosaurov
1
,
M.M. Peregud
1
, E.A. Korotchenko
1
, V.Y. Shishin
4
, A.A. Sheldyakov
4
1
Open Joint Stock Company “The High-Technology Research Institute of Inorganic
Materials named after Academician A.A. Bochvar” (OJSC “VNIINM”),
Moscow, 123060, Russia
2
National Research Nuclear University “MEPhI”, Moscow, 115409, Russia
3
Bauman Moscow State Technical University, Moscow, 105005, Russia
4
Joint Stock Company “State Scientific Center —Research Institute of Atomic Reactors”
(JSC “SSC RIAR”), 433510, Dimitrovgrad, Ulyanovsk region, Russia
The purpose of the work is analysis of the influence of the stress distribution in zirconium
claddings of dispersion type fuel rods on the orientation of hydrides. It is shown that the
circumferential hydrides may be reoriented to the radial hydrides during the cooling pro-
cess when the tensile stress is greater than a certain threshold stress. The determined
threshold value is between 70 and 90 MPa.
Keywords:
zirconium-based alloy, hydrides, stress, distribution, orientation, dispersion
type fuel rod, cladding.
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