[ Power Generation ]
[ Power Generation ]
unearthed numerous scientific and technical endeavours . For example , the University of Alberta is researching the additive manufacturing of high corrosion resistant materials for SMRs . The University states : ‘ this project aims to optimize laser directed energy deposition ( DED ) parameters for a high-temperature corrosion-resistant nickel-based superalloy , with the goal of making it more affordable and accessible for SMRs . With the aid of laser DED , nickel-based superalloys will be used for critical components of SMRs . Key objectives of this project include overcoming metallurgical challenges during the laser processing , such as avoiding the formation of defects due to incomplete fusion and alloying element vaporization . Through a combination of experimental design , mechanical , microstructural , and corrosion analyses , this research aims to comprehensively unravel the difficulties during laser DED of nickel-based superalloys .’ Meanwhile , scientists in China ( 1 ) recently published a technical article about the corrosion behaviour of TA16 titanium alloy during long-term exposure in simulated water environment of an SMR . Summarizing the article simply would not do justice to their work , which can be read in full online ( see references box on final page ).
Further reading on SMRs
The International Atomic Energy Agency website hosts an extensive resource section , including scientific publications , general interest material , official documents , etc . For example , a book published alongside the 2024 conference on SMRs makes for compelling reading ( 6 ) as does a 2018 volume entitled ‘ Advances in small modular reactor technology developments ’ ( 7 ) . This book gives design details for over fifty different types of SMRs with in many cases indications of where corrosion resistant alloys such as stainless steel , zirconium , nickel-based alloys , etc would be required . The World Nuclear Association ’ s information library contains a very extensive overview of SMRs ( 8 ) . This includes details of how specific nations – the US , the UK , Canada , China etc – are supporting SMRs as well as a review of various technology options . These include light water reactors , heavy water reactors , high-temperature gas-cooled reactors , fast neutron reactors , molten salt reactors , and even heatpipe microreactors .
Nuclear power in the form of small modular reactors ( SMRs ) could help steel companies decarbonize their processes .
Similarly , an international team has sought to investigate the dynamic oxide film evolution and corrosion mechanisms of 308L stainless steel in simulated SMR environments ( 2 ) . In the abstract , the researchers state that ‘ these findings elucidate oxide film mechanisms , offering innovative insights for optimizing material design and extending SMR component lifespan under varying water chemistries ’. From the UK , an article by Susan Ortner ( National Nuclear Laboratory ) reviews material requirements and choices for NPPs with an informative section on SMRs ( 3 ) . Stating that SMRs are frequently based on standard-sized NPPs ( bringing advantages such as accumulated material experiences ), she does note however that SMR environments generally differ from those in NPPs , leading to increased demands on components . For example , closer core proximity can result in higher fluxes and temperatures , parts can be smaller and so experience higher stresses , whilst potentially faster coolant flows could lead to erosion and corrosion , etc . Welds in nuclear reactor pressure vessels ( RPVs ) was the topic of a 2024 article by US-based researchers ( 4 ) . Again , please do refer to the original paper for the full picture , but the introduction does carry a very interesting passage as follows : ‘ in the more than half-century since welds were eliminated in RPVs , advanced manufacturing and welding technologies have emerged that offer potentially superior quality , performance , and long-term integrity than conventional RPV forgings and submerged-arc welds . There is mounting interest amongst nuclear industry stakeholders and regulators to explore advanced welding technologies for new construction of LWRs and SMR RPVs , and for repairing
SMR market forecast
The global small modular reactor market size was valued at USD 6.3 billion in 2023 by Straits Research . They projected the sector to reach USD 13.8 billion by 2032 . Commenting how factory fabrication and modular building should result in lower capital costs , faster construction timeframes , and improved safety measures , Straits indicate that the SMRs ’ adaptability extends beyond traditional power generation , with applications spanning from remote and off-grid sites to industrial operations and desalination . This versatility establishes SMRs as a cornerstone in the worldwide drive to transition to a low-carbon future , offering a dependable and resilient energy supply with a low environmental effect . Straits also add that SMRs can help address energy security concerns , thanks to a more dispersed and decentralized energy infrastructure . On the downside , hurdles to be overcome with SMRs include regulatory frameworks , public perception , and funding difficulties .
30 Stainless Steel World April 2025 www . stainless-steel-world . net