(19)

(11)

EP 0 941 544 A1

(12)

(43) Date of publication: 15.09.1999 Bulletin 1999/37 (21) Application number: 97913299.0 (22) Date of filing: 26.11.1997

(51) International Patent Classification (IPC):  H01F 17/ 02( . ) H01F 41/ 04( . ) H01F 27/ 28( . ) (86) International application number: PCT/GB1997/003168 (87) International publication number: WO 1998/024098 (04.06.1998 Gazette 1998/22)

(84) Designated Contracting States: DE FR GB (30) Priority: 27.11.1996 GB 19960024586 (71) Applicant: British Nuclear Fuels PLC Risley Warrington Cheshire, WA3 6AS (GB)	(72) Inventors: JEWELL, Geraint, Wyn Sheffield S3 7NJ (GB) HOWE, David Ecclesall,Sheffield S11 9RA (GB) (74) Representative: Pawlyn, Anthony Neil  Urquhart-Dykes & Lord, Tower House, Merrion Way Leeds, West Yorkshire LS2 8PA Leeds, West Yorkshire LS2 8PA (GB)