S. Mizuno1
1: Tokyo Electric Power Company Holdings,Inc., Tokyo, Japan
H. Kikkawa1
1: Tohoku Electric Power Co., Inc., Sendai, Miyagi, Japan
T. Itoi1
1: The University of Tokyo, School of Engineering, 7-3-1 Hongo Bunkyo city Tokyo, Japan
S. Riehm1
1: EnBW Kernkraft GmbH, Neckarwestheim, Germany