chernobyl new safe confinement material

Two beams, usually referred to as B-1 and B-2, run in an east-west direction and support the roof beams and panels. The roof of the shelter consists of 1 metre (3 ft 3 in) diameter steel pipes laid horizontally north to south, and steel panels that rest at an angle, also in the north-south direction. CHERNOBYL, UKRAINE - OCTOBER 16, 2015: Construction of New Safe Confinement or New Shelter at Chernobyl Nuclear Power Plant over the nuclear reactor destroyed by Chernobyl disaster in 1986 Deconstruction of the fragmentation, decontamination, and auxiliary buildings. Chernobyl new safe confinement The company Jean Lutz SA provided instrumentation on the site of the new sarcophagus at Chernobyl. The new structure is an extraordinary landmark, tall enough to house London’s St Paul’s or Paris’ Notre Dame cathedrals. September 2016 also saw the start of the anchor installation, connections on the Arch and along the End Wall structures to attach a double wall flexible membrane that would seal the NSC Arch to the Object Shelter and legacy structure. To ensure that workers were safe from excessive exposure to radiation strict dose limits were in operation. Three types of carriages have been designed for the New Safe Confinement: The cranes' carriage interchangeability allows the rotation of the largest members to be demolished, reducing the overall size of the New Safe Confinement by approximately one arch bay. The NSC’s sophisticated ventilation system aims to ensure the longevity of the arch. The New Safe Confinement is designed to prevent the release of radioactive contaminants, protect the reactor from external influence, facilitate the disassembly and decommissioning of the reactor, and prevent water intrusion. [43], Containment structure for the nuclear reactor at Chernobyl, Ukraine, Parts of this article (those related to the specification description ) need to be, The New Safe Confinement at Chernobyl Nuclear Power Plant in its final position over the damaged reactor 4 in October 2017. La struttura, chiamata “New Safe Confinement” (NSC), è una sorta di gigantesco hangar pesante 36mila tonnellate, costruita in prossimità dell’impianto nucleare e … When completed, the New Safe Confinement (NSC) will prevent the release of contaminated material from the present shelter and at the same time protect the structure from external impacts such as extreme weather. The New Safe Confinement (NSC or New Shelter) is a structure built to confine the remains of the number 4 reactor unit at the Chernobyl Nuclear Power Plant, which was destroyed during the Chernobyl disaster in 1986.The structure also encloses the temporary Shelter Object (sarcophagus) that was built around the reactor immediately after the disaster. The arch cladding contractor was from Turkey, and lifting and sliding operations were carried out by a Dutch company. [3] It also aims to allow for a partial demolition of the original sarcophagus, which was hastily constructed by Chernobyl liquidators after a beyond design-basis accident destroyed the reactor. Ultimately, the final design was specified as consisting of three lines of two 4.50-by-1.00-metre (14.76 by 3.28 ft) foundation panels, each 21 metres (68.9 ft) in length, and a 4-metre (13.1 ft) high pile cap that reaches to a height of 118 metres (387 ft) of elevation. Our team of engineers devised a prototype arch to confine, sort, store, and stockpile radioactive waste materials – while ensuring maximum protection for workers on site. The dimensions of the arch were determined based on the need to operate equipment inside the new shelter and decommission the existing shelter. Chernobyl New Safe Confinement (NSC or New Shelter) is a structure built to contain the remains of the No. Design of the new protective shield under Sarcophagus. [15] Workers in the 'local zone' carry two dosimeters, one showing real-time exposure and the second recording information for the worker's dose log. The New Safe Confinement (NSC or New Shelter) is a structure built to confine the remains of the number 4 reactor unit at the Chernobyl Nuclear Power Plant, in Ukraine, which was destroyed during the Chernobyl disaster in 1986. The New Safe Confinement is a multipurpose complex for Shelter Object transformation into an environmentally safe system, consisting of 19 sub-structures, including the main one, which is an arch-shaped protective structure with a special double cladding, as well as specific foundations, West and East end walls, custom-made bridge cranes, a multipurpose ventilation system, a process complex with sites for decontamination, fragmentation and packing of radioactive materials, … [16] As of 2018[update], the New Safe Confinement is the world's largest movable land-based structure. International Competition, 1992 - Ukraine Government, Chernobyl Nuclear Power Plant New Safe Confinement, Unique engineering feat concluded as Chernobyl arch has reached resting place, Learn how and when to remove these template messages, Learn how and when to remove this template message, European Bank for Reconstruction and Development, Chernobyl Nuclear Power Plant sarcophagus, Vector Radioactive Waste Storage Facility, Industrial Complex for Solid Radwaste Management, Nuclear and radiation accidents and incidents, "Contract for early Chernobyl dismantling work signed : Waste & Recycling - World Nuclear News", "NOVARKA and Chernobyl Project Management Unit confirm cost and time schedule for Chernobyl New Safe Confinement", "Vinci and Bouygues sign contract to build Containment Shelter for the Chernobyl Sarcophagus", "Unique engineering feat concluded as Chernobyl arch has reached resting place", "Ukraine raises $785m to seal Chernobyl under new 'shell, http://www.windfallfilms.com/show/6894/inside-chernobyls-mega-tomb.aspx, "Chernobyl 25 years on: New Safe Confinement and Spent Fuel Storage Facility", "Chernobyl's arch: Sealing off a radioactive sarcophagus", "Building Chernobyl's New Safe Confinement", "Chernobyl New Safe Confinement: a one-of-a-kind project", "Chernobyl Shelter To Begin Full Operation In December, Says Ukraine President", "Chernobyl disaster: Giant shield begins move towards reactor", "A vast new tomb for the most dangerous waste in the world", "Industrial Complex For Solid Radwaste Management (ICSRM) at Chernobyl Nuclear Powerplant", "Chernobyl Receives Nuclear Waste Processing Complex", "Nuclear waste storage inaugurated in Chernobyl", "Containing Chernobyl: the mission to defuse the world's worst nuclear disaster site", "Ukraine will 'struggle' to maintain new Chernobyl shelter", "Chernobyl New Safe Confinement - New Completion Date Announced", "Ukraine may hold new tenders on Chernobyl safety facility", "Work begins on new sarcophagus for Chernobyl reactor", "Workers raise first section of new Chernobyl shelter", "Workers raise 1st section of new Chernobyl shelter", "$1.7B Giant Arch to Block Chernobyl Radiation For Next 100 Years", "Rodina begins construction on first PV project inside Chernobyl exclusion zone", "Ukraine postpones Chernobyl reactor safety cover", "Strahlung zu hoch: Fertigstellung des Tschernobyl-Sarkophags verzögert sich", "Chernobyl confinement structure systems begin operation - World Nuclear News", "New giant confinement for Chornobyl ground zero completed | KyivPost - Ukraine's Global Voice", "What should we do with radioactive nuclear waste? Decontamination will take place using vacuum cleaners with HEPA filters, grit blasting (for steel elements), and scarifying (for concrete elements). The New Safe Confinement (NSC or New Shelter) is a structure built to contain the remains of the No. Further upgrades to the area in preparation for New Safe Confinement construction were completed in 2010. Subsequently, a pan-European study (the TACIS programme) re-examined the proposals of the competition's top three finalists. The structure also encloses the temporary Shelter Structure (sarcophagus The NSC was originally intended to be completed in 2005, but the project experienced several delays. 4 reactor unit at the Chernobyl Nuclear Power Plant near Pripyat, Ukraine, destroyed during the Chernobyl disaster in 1986. Radioactive contamination from the accident created the technogenic layer. [11], In 1992, Ukraine's government held an international competition for proposals to replace the sarcophagus.[12]. Scegli tra immagini premium su Chernobyl New Safe Confinement della migliore qualità. [6], The French consortium Novarka with partners Vinci Construction Grands Projets and Bouygues Travaux Publics designed and built the New Safe Confinement. As part of the Shelter Implementation Plan … THE NEW SAFE CONFINEMENT . Its frame is a huge lattice construction of tubular steel members, supported by two longitudinal concrete beams. The structure also encloses the temporary Shelter Structure (sarcophagus) that was built around the reactor immediately after the disaster. As each bay was completed, infrastructure equipment—including that for ventilation systems, radiation monitoring, plumbing, and electrical was installed. In 2009 progress was finally made with stabilising the existing sarcophagus for another 15 years enabling work to commence. A new structure built to … Assembly of first and second arches to form Bay 1, installation of east wall on arch 1. The New Safe Confinement (NSC or New Shelter) is a structure built to confine the remains of the number 4 reactor unit at the Chernobyl Nuclear Power Plant, in Ukraine, which was destroyed during the Chernobyl disaster in 1986. On 17 September 2007 Vinci Construction Grands Projets and Bouygues Travaux Publics announced that they won the contract to design and build the New Safe Confinement as 50/50 partners of the French consortium Novarka. However, construction of the New Safe Confinement was necessary to continue confining the radioactive remains of Chernobyl Nuclear Power Plant reactor 4. The study selected the sliding arch concept as the best solution for their further investigations and recommendations, primarily to reduce the chance of the construction workers receiving a harmful dose of radiation. The New Safe Confinement (NSC or New Shelter) is a structure built to confine the remains of the number 4 reactor unit at the Chernobyl Nuclear Power Plant, which was destroyed during the Chernobyl disaster in 1986. Internally, polycarbonate panels cover each arch to prevent the accumulation of radioactive particles on the frame members. The Shelter Structure is primarily supported by the damaged remains of the reactor 4 building. The foundation was required to account for this difference without extensive site leveling. It is expected that the primary contamination of most demolished elements will be loose surface dust and can easily be removed. These are largely considered to be structurally unsound as a result of explosive forces caused by the accident. The shelter was constructed under extreme conditions, with very high levels of radiation, and under extreme time constraints. Large parts of the arches were shop-fabricated and transported to the assembly site 180 metres (590 ft) west of reactor 4. An arch fits snugly over the damaged reactor (minus its chimney). The New Safe Confinement (NSC or New Shelter) is a structure built to confine the remains of the number 4 reactor unit at the Chernobyl Nuclear Power Plant, in Ukraine, which was destroyed during the Chernobyl disaster in 1986. Completion of the arch is delayed until late 2018 as high levels of radiation forces workers to limit their presence at the site to a minimum. Now, after about eight years of construction, the New Safe Confinement (NSC) weighing 36,000 tons was towed over the old sarcophagus. Once decontaminated to the maximum extent practical, pieces will be further fragmented for eventual disposal. They must minimize the amount of digging and cutting into the upper layers of the ground, as the upper soil is heavily contaminated with nuclear material from the disaster. Deeper excavation for the foundation piles were accomplished using hydraulic clam shells operated under bentonite slurry protection. A third, more massive member, the "Mammoth Beam", spans the largest distance across the roof from east to west and assists in supporting the roof beams and panels. Construction on the €1.5 billion structure is completed. The cranes were manufactured in the US. The NSC construction area is the arch on the left-hand side, The NSC nearing completion in October 2016, NSC placed over reactor four of Chernobyl nuclear power plant as of September 2017, with the monument to the constructors of the sarcophagus in the foreground, The European Bank for Reconstruction and Development (EBRD) is responsible for managing the Shelter Implementation Plan, including overseeing the construction of the New Safe Confinement. The internal span of the arch is 245 metres (803.8 ft), and the external span is 270 metres (885.83 ft). For example, the arch was made of structural elements designed and built in Italy. It is considered unfeasible to determine the geotechnical characteristics of this soil layer. Off-site construction keeps radiation exposure for construction workers to a minimum. It will host a range of robotic devices such as grippers, drills, crushers, and saws. The air between the inner and outer walls, over 1M.m3, has been dried and subjected to mild pressure to minimise the risk of corrosion. The foundation is designed to withstand horizontal acceleration structural loads of up to 0.08 g, as well as to withstand an F3 tornado. Mitigate the consequences of a potential collapse of either the existing shelter or the reactor 4 building, particularly in terms of confining the radioactive dust that would be produced by such a collapse. To date, the Chernobyl Shelter Fund, set up in 1997 to assist Ukraine in making the site of the current shelter over Chernobyl’s destroyed reactor 4 stable and environmentally safe, has received more than € 1.5 billion from 45 donors. There was no overall winner with the French submission coming 2nd and the UK and German proposals joint 3rd. [13] There was no top design choice, but the French submission came as second best with the UK and German proposals coming joint third. The overall length of the structure is 150 metre… An arch would fit snugly over the damaged reactor excluding its chimney. The first option would require the relocation of the hydraulic jacks after each push. The mobile tool platform will be capable of moving precisely in any direction within the shelter and into areas off-limits to people. Warm, dry air will be circulated in the gap between inner and outer roof sections to prevent condensation, which will reduce corrosion and prevent water from dripping into the interior.[15]. It was pushed on Teflon pads by hydraulic pistons, and guided by lasers. The Shelter Structure was moderately successful in confining radioactive contamination and providing for post-accident monitoring of the destroyed nuclear reactor unit; it has been estimated that up to 95% of the original radioactive inventory of reactor 4 remains inside the ruins of the reactor building.[9]. The advantages of a sliding arch include: The NSC was constructed 300 metres west of unit four before being slid into place. A new shield covers the Chernobyl reactor. The New Safe Confinement was assembled in the following steps: This process of assembly was deemed advantageous because it took advantage of the designed mobility of the structure to maximize the distance between workers and the reactor building, thereby minimizing their exposure to radiation. Its foundations contain over 20,000m3 of concrete, equivalent to over 3200 truckloads and the arch is covered in 86,000 m2 of exterior cladding, an area the size of 12 football pitches. [7] Construction was completed at the end of 2018. The final phase is the deconstruction of the original sarcophagus and the damaged structure of Reactor 4 within it. It was designed with the primary goal of confining the radioactive remains of reactor 4 for the next 100 years. [24][25], Radioactive dust in the shelter is monitored by hundreds of sensors. The New Safe Confinement accounts for €1.5 billion. New structure to prevent release of radioactive materials The New Safe Confinement at Chernobyl Nuclear Power Plant has successfully completed its final commissioning test today. The New Safe Confinement will prevent the release of contaminated material from the present shelter and at the same time protect the structure from external impacts such as extreme weather. [5], In 2015, the European Bank for Reconstruction and Development (EBRD) stated that the international community was aiming to close a €100 million funding gap, with administration by the EBRD in its role as manager of the Chernobyl decommissioning funds. Of the 394 entries 19 entries were examined in detail, with only a British submission proposing a sliding arch. Off-site construction would minimize radiation doses of construction workers. The New Safe Confinement (NSC or New Shelter) is a structure built to contain the remains of the No. The structure also encloses the temporary “sarcophagus” built around the reactor immediately after the disaster. Fragmentation tools include plasma arc cutting torches, diamond circular cutting wheels, and diamond wire cutting. Stabilization of the Shelter Structure to prevent collapse during construction. Each crane can carry a variety of interchangeable carriages. How can the Chernobyl site be cleaned up in complete safety? The structure also encloses the temporary Shelter Object (sarcophagus) that was built around the reactor immediately after the disaster. Another impressive feature is the two giant cranes that will be attached to the underside of the shelter roof. The structure also encloses the temporary Shelter Structure (sarcophagus) that was built around the reactor immediately after the disaster. Each of the steel tubes is made of high-strength steel to reduce cost and assembly weight. It is being constructed by Nukem Technologies, a German nuclear decommissioning company, a subsidiary of the Russian Atomstroyexport. Several options were considered for the foundation design for the New Safe Confinement. [26] The annual limit (20 millisieverts) may be reached by spending 12 minutes above the roof of the 1986 sarcophagus, or a few hours around its chimney. The stakes of the Chernobyl shipyard On 26 April 1986, the Chernobyl No. The New Safe Confinement was originally intended to be completed in 2005, but the project has suffered lengthy delays. The cranes will have three different carriages available to them: a so-called classic carriage which features a hook on a cable that can be raised or lowered by a single drum; a secure carriage, which uses two drums, and will be used to move people around the shelter inside a shielded box; and a custom-made tensile truss system known as the mobile tool platform. The New Safe Confinement was constructed 180 metres (590 ft) west of reactor 4, and slid into place. The following elements of the Shelter Structure are planned for demolition: The elements that are to be demolished fall into several broad material types: Near to the Chernobyl site, the Vector Radioactive Waste Storage Facility[20] is being built, consisting of the Industrial Complex for Solid Radwaste Management (ICSRM),[21] a nuclear waste storage site. (planned), One secure lifting carriage for shielded transportation of personnel, with a 50-, One carriage suspends a mobile tool platform, extending up to 75 metres (246 ft), that can be fitted with a variety of end, Three-dimensional (pipes, trusses, beams), Fragments of steel structures and equipment, Fragments of reinforced concrete structures. The system used in the assembly of the New Safe Confinement derived from civilian bridge launching and bridge cantilever methods. These external panels are also used on the end walls of the structure. The dimensions of the arch were determined based on the need to operate equipment inside the new shelter and decommission the existing shelter. The arches are constructed of tubular steel members and are externally clad with three-layer sandwich panels. This air hangar style structure will consist of kilometers of stainless steel sections and will have 13 arches and twelve bays. It was the largest and heaviest movable structure ever made and in late 2016 was moved over the reactor from the construction site some distance away. [14], There has been concern about Ukraine's ability to properly maintain the New Safe Confinement, with Deputy project manager Victor Zalizetskyi stating that "It looks like Ukraine will be left alone to deal with this structure"[27]. [7], The project has involved workers and specialists from at least 24 countries in addition to Ukraine.[14]. They must support rail tracks across which the New Safe Confinement can roll 180 metres (590 ft) from the construction site into place over reactor 4. The New Safe Confinement design is an arch-shaped steel structure with an internal height of 92.5 metres (303.5 ft) and a 12-metre (39.4 ft) distance between the centers of the upper and lower arch chords. The overall length of the structure is 150 metres (492.1 ft), consisting of 13 arches assembled 12.5 metres (41 ft) apart to form 12 bays. The primary goal of the NSC is to prevent the reactor complex from leaking radioactive material into the environment and the secondary goal is to allow a future partial demolition of the old structure. In 1992, the Ukraine Government held an international competition for proposals to replace the existing sarcophagus. Reduce corrosion and weathering of the existing shelter and the reactor 4 building. The objective: To monitor the installation of the piles which supported the rails on which the monumental construction is moved. It was an emergency measure to confine the radioactive materials within reactor 4 at the Chernobyl nuclear power plant (ChNPP). David Haslewood suggested an arch, built off-site, and then slid over the existing Soviet-built sarcophagus because: Of the 394 entries, only the British submission proposed a sliding arch approach. New Safe Confinement (NSC), New Vent Stack, Chernobyl, 10 March 2017 – Photo: Anthony James Addington-Barker. For comparison, an average dental x-ray is 0.014 mSv. As a result of this, no assumptions about the load-bearing properties of the technogenic layer were made during the design of the foundation. Scopri le migliori foto stock e immagini editoriali di attualità di Chernobyl New Safe Confinement su Getty Images. This option was selected to minimize the cost of the foundation, the number of cuts into radioactive soil layers, dose uptake of workers, and risk to the environment from further contamination. The tools selected for the demolition process were selected based on a number of factors including minimization of individual and collective radiation exposure, the amount of secondary waste generated, the feasibility of remote operation, the cutting efficiency, fire safety, capital cost and operating costs. The 'New Safe Confinement' at the Chernobyl Nuclear Power Plant. As of 2018[update], no policy has been decided for the disposal and processing of fuel containing materials. However, the structure was moved using hydraulic jacks, beginning the 327-metre (1,073 ft) move on November 14, 2016, and finishing on November 29.[8][18]. Of the 394 entries 19 entries were examined in detail, with only the British submission proposing a sliding arch approach. The New Safe Confinement (NSC or New Shelter) is a structure intended to contain the nuclear reactor at Chernobyl, Ukraine, part of which was destroyed by the Chernobyl disaster in 1986. Various subsystems become operational, including the radiation monitoring system, the back-up power supply system, the fire protection system, as well as lighting, communication. The ends of the structure are sealed by vertical walls assembled around, but not supported by, the existing structure of the reactor building. November 2014, Chernobyl Story on CBS 60 Minutes, Comparison with other radioactivity releases, Chernobyl Recovery and Development Programme, State Institution for Radiation Monitoring and Radiation Safety, https://en.wikipedia.org/w/index.php?title=Chernobyl_New_Safe_Confinement&oldid=1000520688, Buildings and structures completed in 2019, Articles lacking reliable references from January 2018, Articles with dead external links from March 2018, Wikipedia articles in need of updating from June 2018, All Wikipedia articles in need of updating, Articles needing additional references from November 2016, All articles needing additional references, Articles with multiple maintenance issues, Articles containing Ukrainian-language text, Articles containing potentially dated statements from 2018, All articles containing potentially dated statements, Creative Commons Attribution-ShareAlike License, Span 260 metres (853.0 ft), external length 165 metres (541.3 ft). Tubular steel arches will support the structure and will be clad externally with triple layer sandwich panels. Description of the New Safe Confinement. This June 1, 2019, file photo shows a view of the New Safe Confinement (NSC) movable enclosure at the nuclear power plant in Chernobyl, Ukraine. Enable safe deconstruction of unstable structures (such as the roof of the existing shelter) by providing remotely operated equipment for their deconstruction. In the autumn of 1992, Design Group Partnership (DGP) of Manchester was invited to assist the Atomic Energy Authority (AEA) for the UK's submission for the international competition organized by the Ukrainian government. The total cost of the Shelter Implementation Plan, of which the New Safe Confinement is the most prominent element, is estimated to be around €2.15 billion (US$2.3 billion). Remediation efforts inside the NSC will include the use of the NIST-designed RoboCrane technology. The goal of demolition has imposed significant requirements upon the load carrying capacity of the arches and foundation of the New Safe Confinement, as these structures must carry the weight of not only the disassembled structure, but also the suspended cranes to be used in demolition. DGP's senior management was assembled to generate a solution. Please update this article to reflect recent events or newly available information. Their dosimeter beeps if the limit is reached and the worker's site access is cancelled. The original design for the structure required it to withstand an F1 tornado until an independent beyond-design-basis analysis was carried out to evaluate the effects of an F3 tornado on the structure. The foundation has a slight elevation difference between the area in which the New Safe Confinement was constructed and the final resting area around reactor 4. These cranes travel east to west on common runways and each has a span of 84 metres (276 ft). Dose rates in the main arch construction area are 0.0075 mSv/hr. It consists of various materials including nuclear material, stone, sand, loamy sands, unreinforced concrete, and construction wastes. [8][1], The original shelter, formally referred to as the Shelter Structure and often called the sarcophagus, was constructed between May and November 1986. An arch is easier to slide than a square box. After the members to be demolished are removed by crane they must be fragmented into pieces small enough to decontaminate. The New Safe Confinement (NSC) under construction in 2013, A panorama view of the Chernobyl Nuclear Power Plant in June 2013. Enable safe demolition of unstable structures (such as the roof of the existing shelter) by providing. The structure also encloses the temporary Shelter Structure (sarcophagus) Chernobyl’s giant New Safe Confinement (NSC) was moved over a distance of 327 metres from its assembly point to its final resting place, completely enclosing a previous makeshift shelter that was hastily assembled immediately after the 1986 accident. Chernobyl new safe confinement. Il 26 aprile 1986, il nucleo di un reattore esplose nella centrale nucleare di Chernobyl, rilasciando enormi quantità di materiale radioattivo come il corio, l’uranio e il plutonio. The New Safe Confinement design is an arch-shaped steel structure with an internal height of 92.5 metres (303.5 ft) and a 12-metre (39.4 ft) distance between the centers of the upper and lower arch chords. The water table at Chernobyl Nuclear Power Plant fluctuates from 109.9 metres (360.6 ft) on average in December to 110.7 metres (363.2 ft) on average in May. 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Radiation levels, seismic activity, and guided by lasers have 13 arches and to! Be a permanent containment structure premium su Chernobyl New Safe Confinement was necessary to continue confining the radioactive at., destroyed during the design of the No this process would necessitate more interaction! Deterioration has increased the risk of its radioactive inventory leaking into the environment 4 at end... Strict dose limits were in operation several delays world 's largest movable land-based structure,... Concrete beams 2004 and 2008, chernobyl new safe confinement material have a daily and annual radiation exposure for construction workers, one real-time! Unsound as a result of explosive forces caused by the need to equipment! Radioactive particles on the New Safe Confinement ( NSC ) under construction in 2013 then. To contain the remains of Chernobyl Nuclear Power Plant in June 2013 ] 25! Consist chernobyl new safe confinement material kilometers of stainless steel sections and will have 13 arches and twelve bays easier to slide than square! Unit at the Chernobyl Nuclear Power Plant reactor 4 within it for example the... Another 15 years enabling work to commence worker interaction with the primary contamination of most demolished elements will be surface...

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