PSI - Issue 14

3

Sudheer Patri et al. / Procedia Structural Integrity 14 (2019) 688–695 Sudheer patri et. al.,/ Structural Integrity Procedia 00 (2018) 000–000

690

Motor

Outer housing

Guide rods

Screw of ball screw mechanism

Nut of ball screw mechanism

Outer stationary tube

Neutron detector assembly

SS thimble

Core Subassembly

Fig. 1. Schematic of Start-up Neutron

Detector Handling Mechanism (SNDHM)

3. Details of failure During installation tests, abnormal behaviour of the mechanism was observed. The linear motion of the mobile