[1] Western Univ, Dept Mech & Mat Engn, London, ON N6A 5B9, Canada
[2] Siemens Energy Canada Ltd, 9505 Cote Liesse, Montreal, PQ H9P IA5, Canada
[3] Natl Res Council Canada NRC, 75 Blvd Mortagne, Boucherville, PQ J4B 6Y4, Canada
[4] ISIS Facil, Harwell Campus, Didcot OX11 0QX, England