A thimble tube (hereinafter “thimble“) is a tube through which a cable equipped with a small movable detector (MD cable) is inserted into a nuclear reactor in operation to measure the neutron flux distribution therein. The thimble is a long, small-diameter stainless steel tube with an outer diameter of about 8 mm, an inner diameter of about 5 mm and a length of as long as 36 m. The MD cable that is routed through the thimble is an insertion cable with a spiral wire wound around it, and various types of sen...
英字タイトル:
Development of multi-purpose long-range probe for monitoring inside of nuclear reactor