Preliminary Market Engagement - Winfrith Removal of Held-up water from Terrestrial section of the Sea Discharge Pipeline

Magnox Limited is currently preparing to initiate a procurement process for the removal of held up water to the terrestrial element of the Winfrith sea pipeline. Magnox wish to carry out pre-market engagement with interested suppliers to investigate the current market capabilities and gain knowledge about existing and future products and techniques which may assist informing Magnox in the development of the tender documentation. This will ensure that the requirements are effectively met and delivered in a strategy that meets market capabilities and requirements. It also provides procurement awareness for suppliers regarding this requirements. Any information gathered through this market consultation exercise may inform internal business planning and any possible subsequent procurement process and will NOT be appraised in any future tender evaluation exercise. Should you wish to participate in this exercise please register your interest by contacting Neil Allsopp using the contact details listed in this notice.

The procurement is for the removal of held-up water contained within 9.3kms of the terrestrial section of Winfrith’s sea-discharge pipelines (SDP).

The twin pipelines run approximately 1.50m below ground level through predominantly arable farmland. The pipelines are constructed from Schedule 40 API 5L carbon-steel and comprise two 6”- 8” diameter ‘active’ pipelines contained within two 12”- 18” diameter ‘low-active’ pipelines leading to a concrete shore valve-house structure at Arish Mell. It is anticipated that the removal of approximately 10500m3 of water will be required.

In addition to the pipeline, the removal of held-up water contained within a large concrete break-pressure tank is also required. 6 off ‘wash-out’ pits and 6 off ‘air-valve’ pits are located along the length of the pipelines.

The preferred disposal route for the held-up water has not currently been determined.

Two options currently being considered are

1. tanker-transportation to an off-site disposal facility and
2. pumping down the Marine section of the SDP under the existing discharge consent.

The procurement shall include the following:

• Removal all held-up water from within the terrestrial section of the SDP
• Disposal of all held-up water from within the terrestrial section of the SDP