Effective Atomic Displacements in α-Zirconium under Neutron Irradiation

Abstract:

Article Preview

A computer simulation of atomic displacements cascades in α-zirconium is performed by molecular dynamics method. The dependence of the fraction of surviving defects on the PKA energy (in the range from 0.1 to 20 keV) is revealed for the initial temperature of the material of 0 and 600 K. Group neutron cross sections of the effective displacement under neutron irradiation are prepared. The effective dpa rates for zirconium in neutron spectra of different reactors are evaluated. These values are about four times lower than the corresponding values of conventional dpa rates for neutron energies from 0.5 MeV and higher.

Info:

Periodical:

Edited by:

Khanittha Wongseedakaew and Qi Luo

Pages:

52-57

Citation:

V. Svetukhin and M. Tikhonchev, "Effective Atomic Displacements in α-Zirconium under Neutron Irradiation", Advanced Materials Research, Vol. 1042, pp. 52-57, 2014

Online since:

October 2014

Export:

Price:

$41.00

* - Corresponding Author

[1] A.S. Zaimovsky, A.V. Nikulina, N.G. Reshetnikov. Zirconium alloys in nuclear energetics. –M.: Energoatomizdat, 1994. -256 p. (in Russian).

[2] Norgett N.J., Robinson M.T., Torrens I.M., A proposed method of calculating displacement dose rate, -Nucl. Eng. And Design, 1975, 33, pp.50-54.

DOI: https://doi.org/10.1016/0029-5493(75)90035-7

[3] Alder, B. J. and Wainwright, T. E. J. Chem. Phys. 27, 1208 (1957).

[4] D. C. Rapaport, The art of molecular dynamics simulation, Cambridge Univ. Press, (1995).

[5] Oh D.J., Johnson R.A. Simple embedded atom method for fcc and hcp metals. / J. Mater. Res., 1988, v. 3, p.471.

[6] Rose J.N., Smith J.R. et al. Universal features the equation of state of metals. / Phys. Rev. B, 1984, v. 29, p.2963.

[7] G. Shultse. Metal physics. M.: Mir, 1971, 503 p. (in Russian).

[8] Vaidya S. N., Kennedy G. C. / Ibid. 1972. Vol. 33. N 7. pp.1377-1389.

[9] F. Willaime, C. Massobrio / Physic. Rev. B. V. 43, N. 14. 1991. pp.11653-11655.

[10] G.J. Ackland, S.J. Wooding, D.J. Bacon, Phil. Mag., 1995, v. 71. n. 3, pp.553-565.

[11] F. Gao, D.J. Bacon, L.M. Howe, C.B. So. J. Nucl. Mater. 249 (2001) pp.288-298.

[12] L.R. Greenwood and P.K. Smither, SPECTER: Neutron Damage Calculations for Materials Irradiations, ANL/FPP-TM-197 (1985).

DOI: https://doi.org/10.2172/6022143

[13] ASTM E521, (E521-89) Practice for Neutron Radiation Damage Simulation by Charged-Particle Irradiation. Annual Book of ASTM Standards, vol. 12. 02, (1995).