Reactor core unloading device and method for pebble-bed reactor

• Main Authors: MA XIAOLONG, QI PEIYAO, ZHAO YANG, HAN CHUANGAO
• Format: Patent
• Language: Chinese; English
• Published: 04.10.2022
• Subjects: NUCLEAR ENGINEERING; NUCLEAR PHYSICS; NUCLEAR REACTORS; PHYSICS

The invention discloses a pebble-bed reactor core unloading device and method. The system comprises a reactor, a conical blanking pipe, a broken ball separation pipe, a broken ball collection box, a burnup measurement device, a lower stop lever, an upper stop lever, a flow choking and air locking device shell, a spent fuel ball collection port, an arch breaking device, an available fuel ball collection port, a flow choking and air locking device turntable, an inlet channel, a spent fuel ball channel and an available fuel ball channel. The method comprises the steps that after a system is started, when a torque switch of a lower stop lever is located at an ON position and an upper stop lever extends out, a burnup measuring device detects burnup of a ball in a pipe so as to judge whether the ball belongs to a spent fuel ball or a recyclable ball, in the falling process of the fuel ball, when the fuel ball passes through a broken ball separation pipe, broken balls, dust and chippings fall into a broken ball coll