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70 SAFETY, WASTE DISPOSAL, AND MONITORING contamination and disassembly of the reactor to determine what destroyed it. THE SL-1 ACCIDENT, PHASE 3 (1962). 57 minutes, color. Produced by the USAEC's Idaho Operations Office, John L. Feierbacher, consultant. For sale (with prior authorization from the Audio-Visual Branch, Division of Public Information, USAEC) by W. A. Palmer Films, Inc., at $202.88 per print, including shipping case, F.O.B. San Francisco. Available for loan (free) from USAEC headquarters and field libraries. NOT cleared for television, except with the express permission of the USAEC. This is a semitechnical motion picture sequel to the USAEC's earlier film, "The SL-1 Accident, Phases 1 and 2" (1962). It is a factual and historic documentary report on what was done with the SL-1 reactor and building commencing about four months following the accidental nuclear excursion that occurred January 3, 1961. It features a step- by-step reenactment of the accident, animation of the events believed to have taken place during and immediately following the excursion, and a postulation of the cause. The film documents substantially the recovery operations specified under contract with General Electric Company, which was charged with: gathering evidence pertaining to the accident; preparing the facility for core removal; recovery of the reactor core for remote-control examination; demolition of the reactor building; decontamination of the SL-1 site and restoration to habitable status; and presentation of an accident analysis report to the USAEC. Highlights of the film: a review of the SL-1 situation following completion of Phases 1 and 2 recovery operations, including the extent of radiation levels, their sources and locations; procedures and time restrictions ensuring the safety of workers engaged in decon- tamination and dismantling of reactor building; planning and construc- tion of special burial ground for disposal of contaminated equipment; boroscope examination of vessel interior; trial life of vessel viewed by remote cameras; preparation of reactor building for removal of vessel and core; actual lifting and removal of reactor vessel and core; transporting the 13-ton vessel in a 20-foot-high concrete shielding cask 40 miles to a giant hot shop; vessel and core dissection by re- mote control viewed through thick shielding windows; laboratory examination of central control blade and shroud; laboratory analysis of boron strips, flux wires, fuel plates, etc.; maintenance crew reenacting assembly of central control rod blade and drive mechanism at time of accident; animated sequence showing succession of events postulated to have taken place inside the reactor vessel upon triggering of the excursion; explanation of the accident and verification of its overt cause (sudden and excessive withdrawal of central control rod blade); recapitulation of knowledge gained that may be helpful in dealing with or preventing similar accidents in the future.