1. CEA, DES, IRESNE, DEC, F-13108 St-Paul-lez-Durance, France
2. CEA, DES, IRESNE, DER, F-13108 St-Paul-lez-Durance, France
3. Electricité de France, 78401 Chatou, France
4. Electricité de France, 77250 Moret-sur-Loing, France
5. SCK CEN, Belgian Nuclear Research Centre, Boeretang 200-2400, Mol, Belgium