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22 FUELS, PROCESSING, AND METALLURGY hot stage metallography. Formation of twin and kink bands, distortion at grain boundaries, fracturing, recrystallization, deformation due to thermal gradients, as well as microstructural changes associated with thermal cycling through the alpha-to-beta and the beta-to-gamma transformations, are disclosed. The commentary discusses the micro- structural changes as seen in the microscope. NOVEL METHODS OF FUEL FABRICATION (1958). 13V 2 minutes, color. Produced by the Hanford Atomic Products Operation, General Electric Company, as contractor for the USAEC at the Hanford Works, Richland, Washington. For sale by Byron Motion Pic- tures, at $49.61 per print, including shipping case, F.O.B. Washington, D. C. Available for loan (free) from USAEC head- quarters, field libraries, and Hanford Atomic Products Opera- tion, Richland, Washington 99352. Cleared for television. The first novel method covered is cold closure, a process for the cladding of solid uranium fuel in aluminum by sizing on a heavy-walled cup, then cold welding. Electron-beam welding, a process utilizing electrons accelerated through a vacuum, is illustrated, and its applica- tion to welding of many reactive metals is described. Also covered is swaging, a process that has proved to be satisfactory in fabricating clad uranium oxide fuel elements by direct compaction of loose powder. PLUTONIUM FUEL FABRICATION, EBR-I, MARK IV (1961). 10 minutes, color. Produced by USAEC's Argonne National Laboratory. For sale by Byron Motion Pictures, at $30.15 per print, including ship- ping case, F.O.B. Washington, D. C. Available for loan (free) from USAEC headquarters, field libraries, and Argonne Na- tional Laboratory, 9700 South Cass Ave., Argonne, 111. Cleared for television. Fabrication of plutonium fuel and test pieces is complicated by con- sideration of criticality, pyrophoricity, and radioactive toxicity. This film describes the techniques and precautions observed in manufactur- ing fuel for the Experimental Breeder Reactor I (EBR-I), Mark IV. Throughout the production line, plutonium is exposed only in the filtered, recirculating helium atmosphere under a slightly negative pressure. Standard criticality features are observed. Entrance or exit from the line is accomplished through multiple air locks and sealed bags. Although the EBR-I Mark-IV fuel is experimental in nature, the handling techniques and precautions are generally applicable to pluto- nium fabrication. PLUTONIUM FUEL FABRICATION FOR MTR (1958). 11 minutes, color.