Small Modular Nuclear Plant Plans Advance in South Wales

Plans for a groundbreaking small modular reactor nuclear power plant in the Llynfi Valley have gained momentum following the completion of a preliminary design review (PDR) with UK regulators. The US-based company Last Energy announced a £300 million investment aimed at deploying four 20 megawatt electric microreactors at the site of the former Llynfi Power Station in Bridgend, which ceased operations in 1977. If realized, this project could provide continuous clean energy sufficient to meet the annual power needs of approximately 244,000 homes.

The PDR marks a significant milestone as Last Energy’s plant design, known as the PWR-20, becomes the first in the UK to successfully complete this review, conducted by the Office for Nuclear Regulation (ONR), the Environment Agency, and Natural Resources Wales (NRW). The successful completion of the review follows over a year of preliminary engagement with the regulators and five months dedicated to specific PDR assessments, which included design workshops and technical submissions.

Regulatory Progress and Future Plans

Last Energy now has tailored regulatory guidance that will facilitate its transition into the next phase of regulatory assessment, which will cover its design, safety, security, and environmental considerations. Michael Jenner, Chief Executive of Last Energy UK, stated, “As the first micronuclear developer to complete a preliminary design review, we applaud the UK’s nuclear regulators for establishing a clear, flexible and direct regulatory pathway for micronuclear technologies to engage in nuclear licensing and environmental permitting.”

The completion of the PDR is crucial for Last Energy’s target to secure a site licence decision by December 2027, contingent upon the company meeting the established standards and timelines. The PDR process encompassed three main areas: organizational plans and arrangements, environmental considerations, and the safety analysis process.

In January, Last Energy became the first microreactor developer to formally enter the nuclear site licensing process. To support the financing of this ambitious project, the company has secured a letter of intent for approximately £81 million in debt funding from the Export-Import Bank of the United States. Furthermore, Last Energy aims to source at least 10% of its supply chain locally in South Wales, which is expected to generate an estimated £30 million economic impact, excluding business rates. The project is also projected to create around 100 jobs.

Innovative Technology and Environmental Impact

Last Energy’s microreactor design is notable for its efficiency and minimal land requirements, needing only the space equivalent to a third of a football pitch. The modules can be assembled quickly, akin to a Lego kit, with plans for fabrication, transportation, and assembly within a 24-month timeline. The company has also addressed nuclear waste management, stating that the small amount of waste produced will be contained, stored, and transported off-site once the plant is decommissioned. All nuclear components, including used fuel, will be housed within an underground containment structure, featuring a robust 500 tonne metal shield.

As a project deemed of national significance, a final planning decision will be made by Welsh Government ministers after an assessment by its planning body, Planning and Environment Decisions Wales (PEDW).

In summary, the completion of the PDR represents a crucial step for Last Energy as it advances towards establishing the UK’s first commercial microreactor. The project not only promises to contribute to the UK’s clean energy goals but also holds the potential for significant local economic benefits.