NuScale Power Successfully Completes Helical Coil Steam Generator Testing Activities

U.S. Nuclear Regulatory Commission Verifies Quality Assurance Program


Tuesday, February 25, 2014 5:00 am PST

PORTLAND, Ore.--(BUSINESS WIRE)--NuScale Power, LLC announced today that it recently successfully completed its helical coil steam generator (HCSG) testing activities at the SIET S.p.A. (SIET) facilities in Piacenza, Italy, and that during that same time period, the U.S. Nuclear Regulatory Commission (NRC) conducted a successful quality assurance (QA) inspection of the testing activities. The result of the inspection was a rare outcome in that the NRC concluded with no findings, observations, violations, recommendations or non-conformances identified.

The NRC inspection team concluded that NuScale’s and SIET’s QA policies and procedures complied with the applicable requirements, and that SIET’s personnel were implementing these policies and procedures effectively in support of NuScale’s HCSG testing activities.

NuScale is currently developing and testing computer code design analysis software to support the NRC design certification of their advanced light water reactor design. The NuScale design includes a first-of-a-kind HCSG for conversion of nuclear heat into process steam. NuScale contracted the services of SIET for the full-scale testing of the HCSG performance over the expected range of reactor operating conditions. SIET has extensive experience with similar heat exchanger test bundle fabrication and testing for other reactor vendors.

NuScale’s test aimed to:

  • Design and test a steam generator stabilization system so that stable steam generator operation is assured
  • Provide ample data covering the full range of operation to benchmark NuScale HCSG computer codes and models
  • Measure steam generator outlet conditions as a function of primary and secondary system conditions and tube geometry

In December 2013, NuScale Power was selected as the sole winner of the second round of the U.S. Department of Energy’s (DOE) competitively-bid, cost-sharing program to develop nuclear Small Modular Reactor (SMR) technology. As part of the award, NuScale will receive funding that will support the accelerated development of its NuScale Power Module SMR technology. NuScale and DOE are currently negotiating a cooperative agreement that formalizes the public-private relationship and establishes milestones for the five-year funding program.

As the only U.S.-based company established solely for the commercialization of its SMR, NuScale Power has developed a unique and proprietary break-through technology for an innovative, simple, safe, economic and scalable small modular reactor. Natural forces of physics—gravity, convection, and conduction—are used for normal operations and safe shutdown. This eliminates many of the large and complex systems (e.g., reactor coolant pumps, motors, valves, large-diameter reactor coolant system piping) found in today’s nuclear power plants and other SMR designs. As a result, the NuScale plant is safe, simpler, and less expensive to build and operate. At 45 megawatts per module, a NuScale power plant can include as many as 12 NuScale Power Modules to produce as much as 540 MW.

The NuScale design was initially developed in 2000 and has been demonstrated and in testing programs since 2003 in a fully-instrumented one-third scale electrically-heated test facility in Corvallis, OR. In addition, NuScale commissioned a full-scale multi-module control-room simulator in May of 2012. Both facilities were U.S. SMR industry firsts.

About NuScale Power, LLC

NuScale Power, LLC is developing a new kind of nuclear plant; a safer, smaller, scalable version of pressurized water reactor technology, designed with natural safety features. Fluor Corporation (NYSE: FLR), a global engineering, procurement and construction company with a 60-year history in commercial nuclear power, is the majority investor in NuScale. As the sole winner of the second round of the U.S. Department of Energy's (DOE) competitively-bid, cost-sharing program to develop nuclear small modular reactor (SMR) technology, NuScale's design offers the benefits of carbon-free nuclear power but takes away the issues presented by the cost of installing large capacity. A nuclear power plant using NuScale's technology is comprised of individual nuclear power modules; each produces 45 megawatts of electricity with its own combined containment vessel and reactor system, and its own packaged turbine-generator set. A power plant can include as many as 12 NuScale integral PWR modules to produce as much as 540 megawatts. The reactors are cooled by the natural circulation of water and can be shut down safely with no operator action, no AC or DC power, and no external water. NuScale power plants are scalable - additional modules are added as customer demand for electricity increases. NuScale's technology also is ideally suited to supply energy for district heating, desalination and other applications. For more information visit:


NuScale Power, LLC
Chief Commercial Officer
Mike McGough, 410-200-5375

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