Centrica, X-energy Advance Nuclear Plans As UK Regulators To Begin Design Review For Xe-100
The title of this post, is the same as that of this press release from Centrica.
This is the sub-heading.
On the one-year anniversary of the Centrica X-energy partnership being signed, the UK Government has directed regulators to accept the X-energy Xe-100 Advanced Modular reactor into the Generic Design Assessment, marking a significant step toward UK commercial licensing.
Under their partnership, the companies intend to deploy up to 6 GW of new nuclear capacity in the UK (10-20 Xe-100 power stations depending on size of each installation)
These first two paragraphs add some details.
Centrica and X‑Energy, Inc., a leading developer of advanced nuclear reactors and fuel technology, today announced that X‑energy’s Xe‑100 Generation IV advanced Small Modular Reactor (“SMR”) has been accepted into the United Kingdom’s Generic Design Assessment (“GDA”) process.
GDA acceptance formally triggers the process of assessing the design’s acceptability for deployment and operation ahead of the technical and environmental evaluations required for site‑specific licensing and permitting. The assessment is expected to take approximately three years and will be administered by the UK Office for Nuclear Regulation (“ONR”), the Environment Agency (EA), and Natural Resources Wales
To learn more, I asked Google AI for what it knows on the Xe-100 reactor and I received this.
The Xe-100 is an advanced Generation IV high-temperature gas-cooled pebble-bed small modular nuclear reactor developed by the American company X-energy.
Key Specifications & Design
Power Output: Generates about 80 megawatts of electricity (MWe) or 200 MW thermal per unit, and can be scaled up into a four-pack configuration yielding 320 MW.
Cooling System: Uses inert helium gas instead of water to remove heat from the core, reaching operating temperatures above 750°C.
Fuel Type: Runs on proprietary TRISO-X fuel pebbles, where each billiard-ball-sized pebble contains roughly 18,000 microscopic TRISO fuel particles that act as individual containment vessels.
Note.
- 320 MW may seem small, but you have to remember Sizewell A was two 210 MW Magnox reactors and it operated for forty years.
- I like the choice of helium for a coolant. Especially, as the gas is widely used for cooling superconducting magnets, so there must be plenty of expertise.
- Helium is also present in the atmosphere at 5.2 parts per million.
- I also like the concept of the fuel pebbles.
These are some of my questions.
Where Was TRISO Fuel Developed?
The Wikipedia entry for TRISO Fuel has a History section, which starts with this paragraph.
Coated-particle ceramic fuels were initially developed in the United Kingdom as part of the Dragon reactor project. During the development of the Dragon reactor, its designers became concerned by the need to purge gaseous fission products from the reactor core and their potential migration to other parts of the reactor This concern led to the choice of coated-particle fuel, where the fuel would be formed from small particles of uranium then coated with pyrolytic carbon. The inclusion of silicon carbide as a diffusion barrier was first suggested by D. T. Livey in 1961, in order to better retain fission products.
Note.
- The United States and Germany made contributions to the development of TRISO fuel.
- the first commercial reactor to use TRISO, was the 330 MWe Fort Saint Vrain Nuclear Power Plant
- The experimental High Temperature Test Reactor in Japan, constructed in 1998, uses prismatic UO2 TRISO fuel.
- Japan has the only TRISO-fueled reactor in commercial operation.
- Oak Ridge National Laboratory in the United States, developed the process used to make TRISO fuel.
The Wikipedia entry for the Dragon reactor is worth a read.
These are the first two paragraphs of its Wikipedia entry.
Dragon was an experimental high temperature gas-cooled reactor at Winfrith in Dorset, England, operated by the United Kingdom Atomic Energy Authority (UKAEA). Its purpose was to test fuel and materials for the European High Temperature Reactor programme, which was exploring the use of tristructural-isotropic (TRISO) fuel and gas cooling for future high-efficiency reactor designs. The project was built and managed as an Organisation for Economic Co-operation and Development/Nuclear Energy Agency international project. In total, 13 countries were involved in its design and operation during the project lifetime.
Originally conceived as a small research reactor, during the design phase it grew larger. The choice of helium coolant was made after a long debate within the UKAEA between proponents of helium and carbon dioxide, with helium ultimately selected. Groundbreaking occurred in 1960. It operated from 1965 to 1976, and is generally considered extremely successful.
Who Are The Technology Partners Of X-energy?
I had to ask Google AI this question and received this reply.
X-energy works with major technology, industrial, and energy partners to develop and deploy its advanced small modular nuclear reactors (SMRs) and TRISO-based fuel technology.
Key Technology and Strategic Partners
Amazon and AWS: A primary investor (through the Climate Pledge Fund) and customer, Amazon collaborates with X-energy on scaling nuclear energy for data centers and AI infrastructure. X-energy, Amazon Web Services (AWS), NVIDIA, and Idaho National Laboratory are founding members of Project Prometheus to apply AI to advanced nuclear deployment.
NVIDIA: A founding partner in Project Prometheus alongside AWS and Idaho National Laboratory, helping integrate AI accelerators and tools into nuclear design and operations.
Doosan Enerbility & Korea Hydro & Nuclear Power (KHNP): South Korean industrial partners collaborating to support multi-gigawatt deployments of Xe-100 reactors and manufacture key components.
Energy Northwest: A utility partner working on X-energy’s first-of-a-kind project development in Washington state.
Dow Inc.: Partnered with X-energy to deploy an initial four-unit Xe-100 plant at Dow’s Seadrift chemical manufacturing site in Texas.
Centrica: Partnered through a Joint Development Agreement to deploy Advanced Modular Reactors and pursue up to 6 gigawatts of new nuclear capacity in the United Kingdom.
IHI Corporation: Partnered to expand U.S.-Japan supply chain collaboration and commercial-scale manufacturing for reactor components.
Oak Ridge National Laboratory: Collaborates with X-energy’s fuel subsidiary, TRISO-X, on advanced nuclear fuel research.
Note.
- There are companies and organisations here from Korea, Japan, the US and the UK.
- Do Amazon and Centrica see an Xe-100 reactor as a reliable way of powering a data centre without a grid connection?
- The Korean and Japanese companies would be ideal to ensure the quality of reactor and other key compoonents.
- Chemical manufacturing sites use a lot of electricity and Dow’s contribution could define a widespread use of the Xe-100.
- Oak Ridge have been a client of mine in the past and like AWRE in England, I would trust their nuclear technology.
I also believe that if you put these companies in a joint venture, you’ll get out more ideas than you expect.
Who Are The Financial Partners Of X-energy?
I had to ask Google AI this question and received this reply.
Amazon & Climate Pledge Fund: Led major funding rounds (including a $500 million investment in 2024 and ongoing backing) and holds a significant stake in the company.
Jane Street: Led X-energy’s oversubscribed $700 million Series D financing round.
Ares Management: Provided financial backing and funds across multiple investment rounds alongside special purpose acquisition sponsorships.
Emerson Collective: Participated as a key venture capital backer across multiple funding rounds.
NGP Energy Capital Management: Contributed significant capital through multiple financing stages.
Segra Capital Management: Acted as an ongoing financial participant in major capital raises.
Other Investors: Includes ARK Invest, Point72, Galvanize, Ken Griffin (Citadel founder), XTX Ventures, Reaves Asset Management, and the University of Michigan.
Note that like the technology, the finance comes from a wide variety of sources.
This all sounds like a good positive start.
Will Centrica, X-energy Be Going For A Multi-Country Design Review For Xe-100?
There are four major countries with extensive nuclear power experience, with stakes in the Xe-100; Japan, Korea, the US and the UK.
There is also Oak Ridge in the US, which appears to be supplying the concept of the fuel.
If this group can’t convince the regulators in these four countries, that they have a safe and viable project, then they shouldn’t be in business.
Conclusion
It’s now mainly up to the regulators.
Unfortunately, you get stories with titles like this article on the BBC, which have a title of Green Party Leader Criticises Nuclear Reactor Plan.
National Grid And Emerald AI Announce Strategic Partnership To Demonstrate AI Power Flexibility In The UK
The title of this post, is the same as that of this press release from National Grid.
This is the sub-heading.
National Grid and Emerald AI are partnering to show how AI data centres can support a smarter, more flexible grid.
A UK-first live trial is planned for late 2025 on a grid connected data centre using Emerald AI’s platform.
Targeted for late 2025, the demonstration will use cutting-edge NVIDIA GPUs, to dynamically adjust energy consumption
Increased flexibility of data centre consumption can unlock capacity and accelerate connections to the electricity network.
These three introductory paragraphs indicate how the strategy partnership will work.
National Grid and Emerald AI today announced a strategic partnership to demonstrate how AI data centres can work with the transmission network to adjust their energy use in real time, making better use of existing capacity to support the UK’s growing digital needs.
The partners will deliver a live demonstration in the United Kingdom showcasing Emerald Conductor, an AI-powered system that acts as a smart mediator between the grid and a data centre, supporting flexible management of energy demand. Targeted for late 2025, the demonstration will use cutting-edge NVIDIA GPUs, dynamically adjust energy consumption, and support grid stability.
The electricity transmission network is designed with built-in redundancy to deliver world-class reliability and keep the lights on for customers. Capacity is typically available outside of peak events like hot summer days or cold winter storms, when there’s high demand for cooling and heating. That means, in many cases, there’s room on the existing grid to connect new data centres, if they can temporarily dial down energy usage during periods of peak demand.
Yesterday, there was an article in The Times which was entitled Octopus Energy Prepares Kraken Software Arm for Potential IPO.
I asked Google AI what Octopus Energy’s Kraken software does and received this answer.
Launched as part of the Octopus Energy Group in 2016, Kraken now serves 70 million household and business energy accounts worldwide through an operating system that processes 15 billion new data points each day. The software underpins Octopus Energy’s customer management and increasingly sophisticated smart tariffs.
I wouldn’t be surprised that similar methodology is used by both Emerald IT and Kraken.
As I have written at least four scheduling algorithms to best allocate available resources to tasks that need to be done for project management and other similar fields, I would have my ideas about the methods used by the two companies.
I am also sure, that the generic algorithm, that I have used in the past, could step up to the plate one more time, if anybody were to be interested.
ARM: Can ‘Crown Jewel’ Of UK Technology Be Protected?
The title of this post, is the same as that of this article on the BBC.
These are the introductory paragraphs.
The UK government is “looking at options” to protect and ensure future investment in Cambridge-based ARM Holdings, which is being bought by US tech giant Nvidia from Japan’s Softbank.
This is a much more relaxed attitude than the government took when Softbank bought the world-leading chip designer in July 2016. At that time, Softbank announced it had agreed to legally binding commitments to increase investment, headcount and preserve its headquarters in the UK.
It is not too late for the government to impose conditions, but conversations on whether to impose them or what they might be have not even started.
Some of the original founders of ARM Holdings, would appear to be not very happy.
I have followed the company for a number of years, as I was in the same class at Liverpool University with Robin Saxby, who was ARM’s first CEO.
At great surprise to myself, I made a nice sum of money by investing in the shares at the right time.
I am less unhappy, as I think two opposite outcomes would be good for the UK.
- It all goes pear-shaped and large numbers of talented engineers in Cambridge create several children of ARM.
- Nvidia decides that the ARM model and location is better and moves the headquarters of the group to the UK. Trump and his policies could make this likely, by picking fights with countries where Nvidia and ARM have large markets.
It will be interesting to see what happens.
