The tests performed aim to validate that the spent fuel maintains its integrity during normal conditions of transport
Maliaño, November the 17th, 2017.- Equipos Nucleares SA, SME (Ensa) participates in an international and pioneer project to study the behavior during different transportation modes of the nuclear fuel assemblies in its ENUN 32P cask, licensed for both storage and transportation purposes. This is the first time that a test of this nature is performed to verify the integrity of spent fuel in real transport conditions.
The cantabrian company has collaborated with the spanish companies Enresa and Enusa, the US laboratories: Sandia National Laboratories (SNL) and Pacific Northwest National Laboratory (PNNL) and with several organizations in South Korea (KORAD, KAERI, KEPCO and KINS).
This collaborative project has used the ENUN 32P cask, loaded with 3 surrogate fuel assemblies supplied by Enusa, Sandia and Kepco, which were instrumented with gauges and accelerometers to measure the stresses during cask loading movements in the nuclear power plants, as well as during the different transportations carried out: by road, by sea along the coast and across the Atlantic Ocean and by railroad.
Railway transportation tests
The rail transportation tests carried out on the ENUN 32P Ensa cask aims to validate the initial hypothesis that spent fuel maintains its integrity during normal t conditions of transport.
The tests have been carried out by Sandia National Laboratories and Pacific Northwest National Laboratories at the Transportation Technology Center (TTCI) in Colorado where the data was collected, obtaining around 8 terabytes of information.
The ENUN 32P has been subjected to various railway tests such as twist and roll, pitch and bound, dynamic curving, coupling impact, among others.
Preliminary analyses of the data suggest that the real stresses fuel due to vibrations and […]
Ensa collaborates in an international project to study the behavior during transportation of spent fuel assemblies in its cask ENUN 32P
The tests performed aim to validate that the spent fuel maintains its integrity during normal conditions of transport
Maliaño, November 9, 2017.- Ensa has recently delivered 5 racks to store the spent fuel, in the pool of Olkiluoto Nuclear Power Plant in Finland.
With a total capacity of 1,470 positions of spent fuel elements, each racks is formed by panels with a design thatminimizes the number of welds in the assembly.
These components will complete the pool YF-92.08 of the finnish plant that already had 4 Ensa Interlock ® design racks. Currently, they are being transported directly to the plant and their installation in the KPA fuel building is scheduled for 2018.
The cantabrian company designs fuel racks since 1986 and has 38,941 rack cells distributed around the world that operate reliably and safely in 29 pools of 22 plants in countries such as Spain, Taiwan, Germany, South Korea, France, China, United Kingdom and South Africa
The extensive experience in this field has made that the manufacture of these components has been carried out respecting the established deadline and with the quality expected by the client, TVO.
Maliaño, October 20, 2017.- Ensa received approval from MINETAD (Ministry of Energy, Tourism and Digital Agenda), with the favorable report of the CSN, of the design of its ENUN 24P container for the transportation of spent fuel, with which the licensing process in Spain concludes.
The 24UN ENUN design allows the storage and transportation of up to 24 spent fuel elements of the PWR (nuclear pressure water reactor) type by road, rail and sea. Ensa has manufactured a unit of this model, for the Daya Bay plant in Shenzhen – China.
Its licensing is a milestone for the Spanish industry, since the ENUN 24P is the first container licensed in Spain that allows the transport of high-burn fuel (> 45 GWd / MtU). With this, the ENUN 24P comes to swell the list of containers already licensed by Ensa, adding to the ENUN 32P and the ENUN 52B.
Ensa is currently collaborating to complete the validation process of the design by the China Nuclear Regulatory Authority (NNSA), which will allow its client URC (Uranium Ressources Company) to carry out, for the first time, high-burnup spent fuel transportsin China.
Maliaño, September 21, 2017.- Ensa continues its work within the European project COROMA (Cognitively Enhaced Robot for Flexible Manufacturing of Metal and Composite Parts) that aims to strengthen the global position of the european manufacturing industry and contribute to the technological development of 4.0 Industry with the application of robotics in the manufacturing.
The objective of the project is to develop a modular and advanced robotic system capable of executing multiple types of tasks in the field of manufacturing metal parts and composite materials.
The works, already underway, are based on the industrial activities proposed in the first phase of the project by end users, among which Ensa is a technological leader in the manufacturing of components for the energy sector.
This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No. 723853.
Ensa completed the manufacture of the handling and up-ending crane for the ENUN 32P cask and sent successfully its first cask of this type to Almaraz NPP
Maliaño, July 24, 2017.- Ensa has completed the FAT (Factory Acceptance Test) to validate the manufacture of the handling and up-ending crane for the ENUN 32P cask.
This crane is designed to perform all the movements of ENUN 32P cask in the ATI (Individualized Temporary Storage) of Almaraz nuclear power plant.
The crane has two lifting systems; the first one, with a capacity of 120t, serves to up-end the cask and move it vertically and the second, with a capacity of 150t, allows the hoisting of the cask horizontally on the transport cradle.
Different tests were carried out, all of them with satisfactory results, during which all the functions and movements of the crane were tested and the load tests of the different systems were carried out.
The crane complies with all applicable regulations for the handling of spent fuel casks, such as NUREG-0554 “Single Failure Proof Crane” or ANSI N14.6 “Special Lifting Devices for Shipping Containers”.
The project has been completed with engineering, design, purchase of materials, manufacturing and testing activities and finally, the assembly and commissioning of the crane in the ATI of Almaraz NPP and remaining on -site ready for the work at the plant.
In this way, the requirements of the CNAT client (Almaraz-Trillo Nuclear Power Plants) to have the crane in its facilities on time for the reception of the first ENUN 32P cask in Almaraz will be met.
Likewise, the cantabrian company delivered successfully its first double-purpose ENUN 32P cask – storage and transportation of spent fuel – with storage capacity of 32 fuel elements to this plant.
It is the first ENUN delivered to a plant in Spain and is also the first of the ENUN 32P casks contracted by ENRESA to the cantabrian company […]
Ensa collaborates in the improvement and safety of the power stations at an international level through projects carried out for EPRI
Maliaño, July 11, 2017.- Ensa collaborates in the improvement and safety of the power plants at an international level through the projects that are carried out for EPRI (Electric Power Research Institute).
This collaboration consists of the manufacturing of steam generator tubes with real cracks that allow the verification and improvement of the capacity to detect of current non-destructive tests, thanks to the developments of the Advanced Technological Center with the collaboration of the Thermal Treatment Unit of the company workshop.
The company, in collaboration with GE-Hitachi, has designed and developed a system of under water cutting that reduces the volume of the elements stored in the spent fuel pools
Maliaño, July 6, 2017.- Ensa completed successfully the first control rod cutting campaign carried out at Cofrentes nuclear power plant (Valencia). During the campaign, all the equipment was installed and tested, a mock-up was cut and the first real rod cutting was made.
After every outage, certain components of the reactor are stored in the spent fuel pools and the solution developed by Ensa and GE-Hitachi reduces the storage necessity for these, increasing as a consequence the capacity to store the spent fuel elements.
The control rods are formed by two main parts: A cruciform body and a cone at the bottom known as a speed limiter. The system consists of making under water a first horizontal cut, separating the cruciform body from the speed limiter and a second cut through the center of the cruciform profile.
Later, the limiters can be extracted from the pools, while the V-shapedsegments must be packaged and returned to the pool, but with the advantage that the space they occupied in the pool would be half of the one originally occupied.
Ensa will carry out a second campaign in December to complete the processing of existing control rods.
ENSA (Equipos Nucleares S.A), as part of the AMW consortium, has achieved a key F4E milestone: the machining of two inner shell plates – the first pieces to be manufactured at ENSA – has been completed. These plates will make up the longest of the segments of the ITER Vacuum Vessel’s sector 3, and measure each 6 metres long, 1.5 metres wide, and has a thickness of 60 millimetres. The plates are made up of the special ITER grade stainless steel. The long length of each plate has entailed a number of challenging steps involving cleaning; cutting and machining of holes which will house the so-called flexible housings (large cylindrical parts which act as bolts); as well as carrying out a wide variety of inspection techniques in order to detect the presence of defects, characterise findings, and measure without causing any damage to the plates themselves (known as Non-destructive Examination – NDE). What makes this work additionally challenging is the fact that the flatness tolerance (the permissible limit or limits of variation in the overall flatness of each plate) is very tight – only a 0.4 mm variatio
n in 6 metres is permitted. With the right techniques, the necessary flatness tolerance for the plates has been achieved, even despite that the longer the length of the piece, the more difficult it is to attain the same overall flatness.
“This milestone achievement shows the commitment of ENSA as part of the AMW consortium to the delivering Europe’s Vacuum Vessel contribution and its key role in the success of the Vacuum Vessel manufacturing”, says Rafael Treviño, Director General of ENSA.
“F4E is pleased with ENSA’s performance: they keep their commitment whilst anticipating and mitigating issues. ENSA has lived up […]
Representatives of several companies involved in the manufacturing of the components that will constitute the Vacuum Vessel of the ITER Project have met these days at the facilities of Ensa to share the last advances in the experimental fusion reactor.
During the meeting various presentations of the general status of each project have been done and the cantabrian company carried out a presentation of their advances since 2012 and showed the results and conclusions obtained with each mock-up performed, as it has done welding work in various structures and mockups to look for the best parameters and configurations for the welds that will be carried out in Cadarache.
For Ensa, company in charge of welding the segments and ports that are being manufactured for the Vacuum Vessel of ITER, this encounter has resulted “truly fruitful”, since it has allowed them to know other points of view that help to deepen the development of different systems to be able to assemble the components manufactured by the companies attending the meeting.
Ensa’s Advanced Technological Center will carry out the tests of the robot within the COROMA European program
COROMA European project (Cognitively Enhaced Robot for Flexible Manufacturing of Metal and Composite Parts) seeks to develop a new concept of intelligent, modular and flexible industrial robots, capable of executing multiple processes and manufacturing metallic and composite parts for demanding sectors as aeronautics, shipbuilding or power generation. The Advanced Technological Center (CTA) of Ensa will carry out the tests of the robot for this latter case.
The initiative, which started in late 2016 and will conclude in October 2019, has the participation of a total of 16 companies, research centers and universities from seven different countries.
COROMA has a budget of more than 7 million euros, 6 of them have been funded by the European Commission through the program to boost research and innovation Factories of the Future, within the frame of the multi annual program Horizon 2020.
The technical team will work to ensure that the design of the human-robot interface will fast programming. The modularity of the COROMA robotic system will allow it to adapt to the specific requirements of different manufacturing companies.
This Project has received funding from the European Union Horizon 2020 research and innovation program under grant agreement No. 723853.