International consortium UK Nuclear Waste Management (UKNWM) won the 17-year contract to act as Parent Body Organisation (PBO) in 2008.

The contract was the first of its type for site owner Nuclear Decommissioning Authority (NDA) and the nuclear industry as a whole.

The PBO owns the shares in LLW Repository Ltd, the Site Licence Company (SLC), for the period of the contract.

UKNWM consists of AECOM, one of the world’s largest firms in the construction and engineering sector, Studsvik UK, who provide recognised expertise in the treatment and management of nuclear waste and Areva, the world’s largest nuclear service provider.

The PBO acts as a parent company, providing additional resources and management expertise, to carry out the NDA’s mission.

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The contract is split into 3 sections of 5 years and one of two years, with the onus on successful delivery of the objectives laid out in the contract.

The PBO model was designed to improve on-site performance and in its first 5-year term the contract realised savings of £30m, extended the life of the Repository well into the 21st century, reduced volumes of waste bound for the repository by a factor of 3 and seen the opening of Vault 9.

In March 2013 UKNWM was awarded a second 5-year contract. It covers the management and operations of the Repository and the development and implementation of the National Low Level Waste Strategy and runs from 1st April 2013 to 31st March 2018.

LLW Repository Ltd, which has managed the site near Drigg since July 2007, remains committed to operating the Repository in an efficient and environmentally safe manner, providing a continuing safe option for the disposal of low level radioactive waste in the UK.