Doosan Enerbility wins SMR supply deal from US firm NuScale Power

Doosan Enerbility will manufacture a key part of NuScale Power’s small modular reactor. Specifically, it agreed to produce the first upper reactor pressure vessel, or URPV, module for NuScale’s SMR project. This matters because the cooperation is moving into commercial reactor equipment production.

The URPV forms the upper section of the reactor pressure vessel. That vessel contains high-temperature, high-pressure coolant during reactor operation. Doosan is therefore supplying a major pressure-boundary component, rather than an ordinary construction part. The agreement covers production of the first such module.

NuScale’s design was the first SMR design in the United States to receive approval from the U.S. Nuclear Regulatory Commission. That regulatory milestone gives the equipment partnership an important commercial setting. The article does not state the contract’s value, delivery date, or final project location. It also does not say whether Doosan will manufacture every future URPV module.

An upper reactor pressure vessel module is a major section of the pressure vessel surrounding an SMR’s reactor system. The source identifies it as the vessel’s upper section. The vessel contains coolant at high temperature and high pressure, making the module part of an important pressure-containing structure.

Its key mechanism is containment. During operation, the reactor’s coolant circulates within the pressure vessel while carrying heat away from the reactor. The upper section helps complete that enclosed vessel. Doosan Enerbility’s contract covers production of NuScale’s first URPV module, showing that the component is central to the equipment package.

The source does not describe the module’s exact dimensions, materials, seals, or internal fittings. It does establish why the part matters: it belongs to the vessel that holds demanding operating conditions. In a modular reactor design, manufacturing this component as a module supports the broader strategy of assembling major parts at the construction site.

The source article does not give NuScale module dimensions, electrical output, or the number of modules in one project. Based on NuScale’s published design, one module produces about 77 megawatts electric, or MWe. It is roughly 65 feet tall and 9 feet in diameter. A conventional large nuclear reactor commonly produces around 1,000 MWe or more, so one SMR module is much smaller in generating capacity.

NuScale’s plant concept can combine up to 12 modules. The modules are installed together in one project, allowing capacity to grow in stages rather than relying on one very large reactor unit. This is the basic scale advantage of an SMR approach: each reactor unit is smaller, while multiple units can share a site.

These figures come from established NuScale design information, not the supplied article, and designs can change. The article itself only states that SMRs manufacture major components as modules for assembly at construction sites. It does not specify the project’s planned module count or capacity.

Regulatory approval matters because nuclear projects must satisfy strict safety requirements before companies can commercialize their designs. NuScale’s design was the first SMR design in the United States to receive approval from the U.S. Nuclear Regulatory Commission. That gives NuScale a major position in the U.S. SMR market and distinguishes its technology from designs still awaiting approval.

For suppliers, approval provides an important signal that the design has passed a formal regulatory review. Doosan Enerbility is now contracted to produce the first upper reactor pressure vessel module for NuScale’s project. The approval helps place that manufacturing work within a recognized reactor design rather than an entirely unapproved concept.

Approval does not itself guarantee construction, financing, or commercial operation. It also does not mean every future project automatically receives permission. However, it can reduce regulatory uncertainty, support customer confidence, and make it easier for NuScale and its suppliers to pursue equipment production and deployment.

Manufacturing reactor components as modules can move more work into controlled factory settings. Major parts are produced before reaching the construction site, then transported and assembled there. This matters because factory production can make repeated components more consistent and reduce the amount of complex work required on site.

The article gives the central mechanism: SMRs manufacture major components as modules for assembly at construction sites. Doosan Enerbility’s planned production of NuScale’s first URPV module illustrates this approach. Rather than treating every reactor as a unique, fully site-built project, the design uses equipment made as standardized or repeatable modules.

The intended result is lower construction cost and a shorter building period. These benefits are design goals, not guaranteed outcomes. Actual savings depend on manufacturing capacity, transportation, site work, regulation, financing, and project management. The source does not provide a cost estimate, a construction schedule, or evidence that this particular project has already achieved those reductions.

NuScale Power is the U.S.-based company developing the small modular reactor design. Its role is to create the reactor technology and advance the project toward deployment. The company’s design achieved an important milestone because it became the first U.S. SMR design to receive approval from the U.S. Nuclear Regulatory Commission.

Doosan Enerbility is the equipment manufacturer. Under the new contract, it will produce NuScale’s first upper reactor pressure vessel module. That component forms the vessel’s upper section, which contains high-temperature, high-pressure coolant. Doosan therefore turns part of NuScale’s approved design into manufactured reactor equipment.

The U.S. Nuclear Regulatory Commission is the safety regulator that reviewed and approved NuScale’s design. Its approval provides regulatory authorization for the design, but it is not the same as guaranteeing construction or operation of every project. Bringing an SMR to market still requires manufacturing, project development, site work, and further approvals where applicable.

In a nuclear reactor, controlled fission splits heavy atomic nuclei and releases heat. Control systems regulate the chain reaction so heat production remains steady rather than growing uncontrollably. A coolant carries that heat away from the reactor core. In NuScale’s design, the reactor pressure vessel contains high-temperature, high-pressure coolant.

The heat is transferred to water, turning it into steam. The steam flows through a turbine and makes its blades rotate. The turbine is connected to a generator, which converts that rotation into electrical power. Afterward, the steam is cooled back into water and reused in the plant’s water cycle.

This is the basic heat-to-electricity process used by nuclear power plants, although reactor designs differ in how they circulate coolant and create steam. The supplied article does not explain fission or electricity generation in detail. It only identifies the pressure vessel’s hot, pressurized coolant and describes SMRs as modular reactor systems.