Contact: John Ballantyne

Devonport Management Ltd (DML) was established to run Devonport Royal Dockyard in response to the challenges facing this strategic facility during the late 1980's. DML act as Prime Support contractors to the Royal Navy, providing comprehensive through-life support for submarines, surface ships and equipment. The company also provides planning and management of integrated programmes, technical and logistics support and comprehensive data management services.

Since 1994, Halcrow have been continually delivering services to DML, including several major projects, such as the Submarine Refit Complex (SRC) substantiation and 9 Dock Reactor House design, with an approximate project capital value of £10m.  These services include seismic retrofit, independent technical assessment, detailed design and safety case support on a number of refurbishment / upgrading projects.  Halcrow has utilised leading technological approaches, such as performance based design and carbon fibre strengthening, to deliver value to our client.

Projects with DML include:

	5 Basin North Wall
	Dockyard, Steam Barge Hazard Assessment
	Low Active Discharge Pipeline
	Royal Dockyard: 9 Dock Beyond Design Basis Seismic Assessment
	Royal Dockyard - Independent Technical Assessment (ITA)
	Royal Dockyard - ITA for Dock SSN Non Refuel Facility
	Royal Dockyard, Nuclear Transfer Route
	Submarine Refit Complex – M&E Services
	Submarine Refit Complex
	SRC Wet Berth Pumphouse Non Tidal X Berths

9 Dock Dock Reactor House design (RAH)

Halcrow was commissioned by DML in October 2000 to advise on the adequacy of the existing 9 Dock Reactor Access House (RAH) design. As a result of this review Halcrow was commissioned by DML to undertake a full and complete reanalysis and redesign of the RAH structure, including the crane (the structure by this stage was essentially fully fabricated).

The reanalysis involved formulating a completely new Finite Element model of the RAH structure, the
45te high integrity crane located within the RAH and the low level transfer trolley. This model was used for the extreme hazards analyses which include seismic, extreme wind, blast and temperature.  The RAH structure is arguably one of the most complex and nuclear safety sensitive steelwork structures in the UK and was subject to rigorous scrutiny during its approval by the Nuclear Installations Inspectorate (NII).

Halcrow produced a complete reanalysis and redesign of this existing structure to the latest nuclear standards for ‘new build’ structures, all to NII approval, in 15 months; an extremely challenging programme.  Delivering the 9 Dock RAH project in this short time was essential to ensure that a critically important refit programme could start on time.

Halcrow looks forward to continuing to work with DML and its supply chain in delivering further successful projects.