https://peertube.dngr.us/videos/watch/f94f7a16-b77c-4753-8f2d-b1993c2be727 Join this channel to get access to perks: https://www.youtube.com/channel/UCddem5RlB3bQe99wyY49g0g/join Join us on Patreon, visit https://www.patreon.com/PeriscopeFilm Visit our website www.PeriscopeFilm.com View our Amazon store here: https://amzn.to/3XQHsVD This animated film describes the Advanced Test Reactor (ATR), a research reactor built in 1967 at the Idaho National Laboratory, located east of Arco, Idaho. This reactor is primarily designed and used to test materials to be used in larger-scale and prototype reactors. It can operate at a maximum power of 250 MW and has a "Four Leaf Clover" design (similar to the Camunian rose) that allows for a variety of testing locations. The unique design allows for different flux in various locations and specialized systems also allow for certain experiments to be run at their own temperature and pressure.The ATR is ordinary (light) water moderated and cooled, with a beryllium neutron reflector. The Materials Test Reactor is also described. The primary purpose of the MTR reactor was to test under conditions of severe neutron bombardment the materials which might be used in reactor construction (in the structures, cooling systems, or shields). The film describes the ATR's design and purpose, which is to test materials' lifetime characteristics in reactor environments through accelerated irradiation. It utilizes flux traps to create high neutron fluxes in experimental regions surrounded by fuel, with the ability to adjust the flux spectrum by changing the moderating material. The reactor operates with a core configuration that includes flux traps, special fuel control components, and support structures, ensuring efficient and advanced performance. Power distribution is maintained through rotating beryllium shim cylinders with hafnium plates. The ATR’s safety systems, including safety rods and shim rods, provide crucial regulation and protection. The reactor core is surrounded by a beryllium reflector, and coolant flows through the system to maintain optimal conditions for irradiating test specimens using various coolants. 00:00: The Advanced Test Reactor (ATR) predicts the lifetime characteristics of materials in reactor environments using accelerated irradiation in test reactors. 1:14: The 40 megawatt Materials Testing Reactor and the 175 megawatt Engineering Test Reactor are introduced, each providing high neutron fluxes to test materials. 1:42: The ATR aims to provide even more severe test environments, utilizing the flux trap concept to create high flux in an experimental region surrounded by fuel. 2:08: The ATR improves efficiency by combining five flux traps into a single pressure vessel, with one control system and auxiliary hardware. 2:41: The ATR’s core configuration and serpentine fuel design allow for multiple flux traps in a circular geometry, with peak fast fluxes of 1.5 x 10^15 fast neutrons per square centimeter per second. 3:05: The ATR has a core configuration with 96-inch flux traps surrounding experiment pressure tubes. Each trap’s flux spectrum can be modified by changing the composition of the moderating material. 3:29: Power distribution is adjusted by rotating beryllium shim cylinders with hafnium plates to maintain a constant vertical flux distribution as fuel is consumed. 4:14: The ATR’s special fuel control components and support structures, including aluminum next shim housing, flux trap baffle tubes, and cylindrical safety rods, ensure advanced reactor performance and safety. 5:01: The safety rods drop into position through gravity, spring, and hydraulic forces during a reactor scram. They can be placed in eight positions based on critical tests. 5:55: The ATR uses 24 hafnium shim rods for fine regulation and 16 outer shim cylinders for control. The fuel annulus is made of 40 elements, with uranium oxide fuel in an aluminum matrix. 7:08: The reactor core is surrounded by a beryllium reflector, and coolant flows upward through the thermal shields and downward through the core and reflector. 7:45: Test specimens may be irradiated using water, gases, or liquid metal coolants at temperatures and pressures similar to those in advanced power reactors. Motion picture films don't last forever; many have already been lost or destroyed. We collect, scan and preserve 35mm, 16mm and 8mm movies -- including home movies, industrial films, and other non-fiction. If you have films you'd like to have scanned or donate to Periscope Film, we'd love to hear from you. Contact us via the link below. This film is part of the Periscope Film LLC archive, one of the largest historic military, transportation, and aviation stock footage collections in the USA. Entirely film backed, this material is available for licensing in 24p HD and 2k. For more information visit http://www.PeriscopeFilm.com Source: https://www.youtube.com/watch?v=zQbJFO4AFv0 Mirrored from Periscope Film (https://www.youtube.com/@PeriscopeFilm) Fri, 12 Jun 2026 03:39:46 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://peertube.dngr.us https://peertube.dngr.us/lazy-static/avatars/41a6fee9-7f57-42d0-a5fc-5db4f1af2e31.png https://peertube.dngr.us/videos/watch/f94f7a16-b77c-4753-8f2d-b1993c2be727 All rights reserved, unless otherwise specified in the terms specified at https://peertube.dngr.us/about and potential licenses granted by each content's rightholder.