Engineering Design Consultants

Design of high integrity nuclear handling equipment

Following very positive feedback for substantiation work provided on similar previous projects, Eadon Consulting were requested by a large nuclear processing facility to provide the design and design substantiation for a piece of high integrity nuclear handling equipment.

Eadon Consulting are currently responsible for the design of the structural and mechanical components of the high integrity nuclear handling equipment.  The equipment is required to be robust against a number of operational and fault load cases, as well as a seismic (earthquake) event.  Design of the structures and mechanisms is to BS2573-1 and BS2573-2 (Rules for the Design of Cranes).   Seismic analysis was undertaken in accordance with ASCE-4-98 (Seismic Analysis of Safety Related Nuclear Structures). 

Eadon started out by looking at the initial design of the equipment and then moved forward into the detailed design phase of the project. Both the design and substantiation processes ran in parallel, to ensure that the proposed design fitted with the defined design standards, the defined scope was being fulfilled and all safety functional requirements (SFR’s) were being achieved.  The equipment was modelled in 3D using Solidworks and the structural components, being designed and substantiated using a finite element (FE) model in ANSYS APDL, included a response spectrum analysis to assess behaviour of the global structure under seismic loading. The team also carried out seismic assessments of a separate component located on the equipment. Initially using hand calculation guidance from ASCE 43-05 (Seismic Design Criteria for Structures, Systems and Components in Nuclear Facilities) to assess the response of an unanchored rigid body under seismic loading, the team were able to demonstrate stability under a design basis event (DBE), as well as gauge margins against a beyond design basis event (BDBE).  The mechanical components were designed and substantiated using hand calculations in accordance with ASCE 4-98, which take input loads from the FE model.

Eadon Consulting continue to be responsible for producing the general assembly (GA) and detailed manufacturing drawings for all components.

In line with the requirements of the nuclear sector, the quality required of all reports, calculations and technical drawings is very high; Eadon Consulting have received very high praise from the client for both the content and the presentation of work produced to date.

Last year, Eadon Consulting were responsible for the design substantiation of a similar piece of high integrity nuclear handling equipment; this is currently being manufactured and Eadon Consulting are providing technical support during this process.

For more information regarding our nuclear design and analysis services or to discuss your nuclear design requirements, please telephone 0114 399 0400 or email us.

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