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Design and manufacturing of a large transport container for nuclear waste

This client is a leading group in the UK nuclear sector.

During decommissioning operations, it is sometimes more economic and safer to dismantle larger sized objects for decontamination at a specialist facility. In order to transport such items, specialist transportation containers that comply to IAEA safety standards are be used.

This client, which is responsible for the safe and secure operation and clean-up of a nuclear site in the UK, needed such a container to transport large size objects. The driver for this investment was to design and manufacture a new asset that provides safer operation and complies with modern standards, in particular IAEA (International Atomic Energy Agency).

This client has appointed Assystem, within a Joint-Venture, to design such a transport container for use on the UK road network and able to carry various LLW (low level radioactive waste) payload sizes up to 6m x 2.4m x 2.5m.

Conceptual designs for frequency changer control of a nuclear dockyard

The client is a leading player in the UK nuclear defence industry.

One of the dockyards located the UK is the client licence holder. It deals with the owned and operated nuclear facilities, situated on the Licensed Site, related to Her Majesty’s Naval Base. These licenced facilities deal with the maintenance activities that are required for the Royal Navy fleet comprising nuclear-powered submarines.

Rotating Frequency Changers are installed onsite to convert the 50 hertz national grid electrical supply to the 60 hertz supplies required for berthed naval vessels. The Frequency Changers had been installed for circa 30 years, consequently obsolescence issues were arising with the associated control systems.

There was a continued requirement to provide reliable 60Hz electrical supplies to naval vessels for the next 20 years. Therefore, the intention was to upgrade the Frequency Changer Control System with the aim of being able to improve reliability, remove the risk of significant system failure and to ensure spares availability throughout the plant lifetime.

This client appointed Assystem to deliver the replacement Frequency Changer control system concept design.


Design of specialist tooling to equip nuclear submarines

This client, a world-leading provider of power systems and services for use on land, at sea and in the air, has established a strong position within global markets including Civil Aerospace, Defence and Power Systems.

The project is dedicated to Tooling Design and Modification Programme. The types of tools ranged from simple lifting and handling equipment, to complex welding fixtures, hydraulic press tooling, cleaning and pickling tools and robust product manipulation workbenches.

This client appointed Assystem as the preferred supplier for the design of specialist tooling, into Submarines. In fact, the Assystem Tooling Design team was based upon the client’s site and developed substantiated design solutions that were used in the assembly of products for on-board applications.

Design and construction support for the decommissioning of the Sellafield nuclear site

Sellafield Ltd, a major player in the nuclear industry in the United Kingdom, is responsible for the safe and secure operation and clean-up of the Sellafield nuclear site. It now comprises 400 buildings spread over 10 sqm and employs around 10,000 people..

The DSA (Design Services Alliance) framework agreement, won by a joint-venture, is a multi-disciplinary design and safety contract focused on hazard reduction and decommissioning for the Sellafield site in West Cumbria, United Kingdom..

This joint-venture has appointed Assystem (25% partner), which was tasked with developing a completely new approach for the delivery of engineering, design and safety case assessment services in support of Sellafield’s operations. Assystem, together with their partners in the joint-venture, have been engaged to deliver a step-change improvement in safe, efficient, site-focused design services through collaborative working, aligned objectives and stakeholder accountability.

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