Tapered leaf support pin for operating plant guide tubes

Patent · Tue Jul 30 04:00:00 EDT 1991

OSTI ID:5560458

Land, J T; Hopkins, R J; Ford, D E

This patent describes a mounting system for removably mounting the lower flange of a control rod guide tube over an opening in the upper core plate of a nuclear reactor comprising at least one elongated support pin mounted on the guide tube lower flange and resiliently receivable in a bore formed in the upper core plate. It comprises a support pin having a longitudinal axis and comprising a first pin portion mountable on the guide tube lower flange, and a second pin portion receivable within the upper core plate bore, the second pin portion including a solid body section adjacent the first pin portion and having an outer diameter which is accommodated by the bore by a close clearance fit; locking means mounted on the first pin portion of the support pin for retaining the guide tube lower flange between the solid body section of the second pin portion and the locking means; and a washer disposed around the first pin portion between the locking means and the control rod guide tube flange, the washer and the locking means including mutually engaging rounded surfaces for eliminating bending moments and stresses on the support pin during mounting of the locking means on the first pin portion of the support pin.

• Assignee: Westinghouse Electric Corp., Pittsburgh, PA (USA)
• Patent Number(s): A; US 5035852
• Application Number: PPN: US 7-376771
• OSTI ID: 5560458
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220300 -- Nuclear Reactor Technology-- Fuel Elements
220400* -- Nuclear Reactor Technology-- Control Systems
CONTROL ELEMENTS
CONTROL SYSTEMS
ENGINEERED SAFETY SYSTEMS
FUEL ASSEMBLIES
FUEL ELEMENTS
FUEL PINS
GUIDE TUBES
REACTOR COMPONENTS
REACTOR CONTROL SYSTEMS
REACTOR CORE RESTRAINTS
REACTOR CORES
REACTOR PROTECTION SYSTEMS
RESTRAINTS
TUBES