10/5/719 01108136 Author(s): (Item 419 from file: 103) ERA-08-002935; EDB-83-008137 Fee, J.J. Title: Operation Crossroads. Radiological decontamination of target and non-target vessels. Volume 2. Director of ship material technical inspection report Corporate Source: Joint Task Force One, Publication Date: 1946 p 145 Report Number(s): AD-473907/4 Document Type: Report Language: English Journal Announcement: EDB8207 Washington, DC (USA) , ' Availability: NTIS, PC AO7/MF AOQl. Subfile: ERA (Energy Research Abstracts). Country of Origin: United States Country of Publication: United States Abstract: No abstract available.; Major Descriptors: *CROSSROADS PROJECT -- DECONTAMINATION; *SHIPS -DECONTAMINATION Descriptors: CONTAMINATION; EVAPORATORS; FALLOUT; NUCLEAR EXPLOSIONS; PIPES ; PROTECTIVE CLOTHING; RADIATION PROTECTION; SAMPLERS; SAN FRANCISCO BAY; SEAWATER; UNDERWATER EXPLOSIONS Broader Terms: CLEANING; CLOTHING; EQUIPMENT; EXPLOSIONS; HYDROGEN COMPOUNDS; LABORATORY EQUIPMENT; NUCLEAR EXPLOSIONS; OXYGEN COMPOUNDS; PACIFIC OCEAN; SEAS; SURFACE WATERS; WATER Subject Categories: 450202* -- Explosions & Explosives -~ Nuclear -Weaponry -- (-1989) 400702 -- Radiochemistry & Nuclear Chemistry -- Properties of Radioactive Materials 10/5/720 01108135 Author(s): Title: (Item 420 from file: ERA-08-002934; Fee, J.J. Operation Crossroads. Radiological decontamination of target and non-target vessels. Volume I. inspection report Corporate Source: 103) EDB-83-008136 Director of ship material technical Joint Task Force One, Publication Date: 1946 p 145 Report Number(s): AD-473906/6 Document Type: Report Language: English Journal Announcement: EDB8207 Washington, DC (USA) Availability: NTIS, PC A0O7/MF A0Ol. Subfile: ERA (Energy Research Abstracts). Country of Origin: United States Country of Publication: United States Abstract: It was soon after Test Baker that the radioactive fission products were absorbed readily by rusty, porous and scaly surfaces loose paint, marine growths and algae. This fact was demonstrated ‘ ur> cry 900 forcibly on the lightly contaminated target APA's, which showed considerable radiation intensities on the outer shell in the vicinity of the waterline. The radioactive materials were lodged almost entirely in the marine growth and rust adhering to the shell. These vessels using ordinary paddle type bottom scrapers removed as much as practicable of the growth in the waterline area and thereby reduced considerably the amount of activity in that vicinity. They next proceeded outside the lagoon and steamed at high speed for a period of about 24 hours. The erosion of the water incident to this steaming resulted in a further reduction by about fifty percent. Continued streaming did not result in additional reduction of activity, however. Upon return to port, GENEVA wire-dragged the entire bottom using hogging lines and walking them down the length of the ship. This operation resulted in reducing the radiation levels inside the ship in the vicinity of the shell to tolerance limits for continuous occupancy.