(19)

(11)

EP 0 518 860 A1

(12)

(43) Date of publication: 23.12.1992 Bulletin 1992/52 (21) Application number: 90915679.0 (22) Date of filing: 07.03.1990

(51) International Patent Classification (IPC):  G21C 3/ 62( . ) (86) International application number: PCT/US1990/001111 (87) International publication number: WO 1991/014268 (19.09.1991 Gazette 1991/22)

(84) Designated Contracting States: BE CH DE ES FR LI NL SE (71) Applicant: COMBUSTION ENGINEERING, INC. Windsor, Connecticut 06095 (US)	(72) Inventors: FUHRMAN, Nathan Plainville, CT 06062 (US) JONSSON, Alf, Ingemar West Suffield, CT 06093 (US) (74) Representative: Rupprecht, Klaus, Dipl.-Ing., et al  c/o ABB Patent GmbH, Postfach 10 03 51 D-68128 Mannheim D-68128 Mannheim (DE)