 |
Engineering substantiations at Harwell, since 2001 |
|
Building services design and construction supervision for the new D2003 office building at Dounreay – winner of BREEAM environmental award in "excellent" category |
|
General multidisciplinary support to sites including; extensive asbestos surveys for over 200 buildings at Dounreay, secondment of specialist staff, various and diverse design and post-project reviews, and contract documentation services |
Halcrow, as designers for the D1225 shaft isolation project, has provided leading-edge technology development and detailed design services supported by extensive detailed trials for the construction and validation of a 10m wide, 100m perimeter multi-stage grout ring, in rock, to surround the shaft and extend below its base to a depth of 80m. The grout ring is required to minimise potential inflows during shaft dewatering, which is to be undertaken as part of the future reclamation of nuclear waste deposited in the shaft in the 1960s and 70s. This is a technically demanding project which entails the use of advanced grouting technology, complex hydro-geological mathematical modelling and state-of-the-art substantiation of the design. It is widely regarded as the UK's most challenging remediation project.
Halcrow provided multidisciplinary engineering services, as the design partner in the DFR-PCD project Alliance. This challenging project was developed by the Alliance from an initial concept by UKAEA, to establish a comprehensive cost and risk profile. This was then subjected to a technical challenge which led to development of a more cost effective alternative.
The Dounreay D1209 ventilation project is another innovative project, designed by Halcrow. This project involves taking over a partially developed concept and completely re-engineering it to comprise; a 300m long central collector duct connected to 24 separate facilities in the fuel cycle area, new fans in a modified existing fan house and a new multi-flue discharge stack. A key innovation is the structural support system located over an existing access corridor.
The engineering substantiation services provided by Halcrow have been extensive and diverse covering building structures, mechanical and electrical services, items of plant including cranes and lifting equipment and the existing B462-9 ILW retrieval machine. Halcrow also acted for UKAEA in design and procurement of a replacement retrieval machine. This work has allowed extension of the operating life of numerous facilities and minimisation of expenditure on modifications and upgrades to meet modern standards.
Halcrow looks forward to continuing to work with UKAEA and its supply chain in delivering robust project outcomes, to budget and programme; that provide confidence and measurable cost benefits within a challenging framework.
|
