|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||376/417 ; 376/457|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 1 인용 특허 : 16|
In a nuclear fuel rod having a zirconium liner and a method of manufacturing the same, the outer surface of a zircaloy cladding tube in which fuel pellets are filled has an oxide film having fine irregularities of which the pitch is 1 .mu.m or less. The fine irregularities are formed by oxidizing the surface in high temperature steam or polishing the surface of the cladding tube. The surface of the fuel rod can effectively trap radioactive substances in the reactor water.
[ We claim:] [1.] A nuclear fuel rod comprising:fuel pellets;a cylindrical zirconium liner in which the fuel pellets are confined; anda zircaloy cladding tube covering the liner, the zircaloy cladding tube having an outer surface said outer surface having grooves in at least a part of the outer surface, said grooves having a pitch of lam or less.