Core instrument cutting system,申请号US19910788962-传众专利搜索

Core instrument cutting system

申请公布号：US5227123(A)

申请号：US19910788962

申请日期：1991.11.07

申请公布日期：1993.07.13

申请人：

COMBUSTION ENGINEERING, INC.

发明人：BAVERSTEN, BENGT I.

分类号：G21C19/20

主分类号：G21C19/20

摘要：A method of removing in-core instruments and dry tubes from a boiling water reactor during a refueling outage wherein a pair of temporary storage containers are provided in the reactor core. A remotely operated cutting device is superposed on the first temporary storage container. An instrument is suspended by an end, with the in-core part uppermost, and lowered until a portion of the out-of-core part is within the first temporary storage container. The cutting device is then operated to sever the instrument portion within the temporary storage container. The instrument is repeatedly lowered, and portions severed, until all of the out-of-core part of the instrument is in the first temporary container. The in-core part of the instrument is then lowered into the second temporary container and the two temporary containers are removed from the reactor cavity using the existing equipment-handling crane.