Document Details

Report on Hot Run #9 and Weekly Surveys in 706-C for Period 5/21/45-5/29/45
Subject Terms:
Building 706-C; Health Physics; Hot Runs
Morgan, K.Z.
Document Location:
DOE INFORMATION CENTER 1 Way, Oak Ridge, TN 37831; Eva Butler; Phone: 865-241-4780; Toll-Free: 800-382-6938, Option 6; FAX: 865-574-3521; Email:
Document Categories:
Health, Safety and Environment\Worker Health and Safety
Document Type:
Publication Date:
1945 May 30
Declassification Date:
1957 Jan 24
Declassification Status:
Document Pages:
Accession Number:
Document Number(s):
Originating Research Org.:
Clinton Laboratories
OpenNet Entry Date:
1995 Mar 10
Report describes Run #9 which started May 22, 1945 at about 8 a.m. to obtain 1000 c with 17 batches of slugs. At the start of the run there was a 730 mr/hour beam coming out of the north side of Cell 4 storage tanks due to contamination inside the tanks from the previous run. Background readings in the Analytical Lab were 6 mr/hour; at the Engineering Panel 4 mr/hour; and on top of Bank II, 25 mr/hour. Due to 706-C beams, 706-D had a reading of 35 mr/hour at the start of the run. Backgrounds generally increased until May 26, 1945 when beams from the storage tanks were causing a background of 48 mr/hour at the top of the west stairs in 706-D; 27 mr/hour in the Analytical Lab; 25 mr/hour on Engineers' side of Bank 2; and 65 mr/hour on top of Bank 2. The activity level was surveyed every shift and film packs were used at at leaset one operator and on the samplers. Overdoses occuring during the run are recorded in table form for three samplers. One high precipitron sample taken on May 23 during a 1/2 hour run at the Engineer panel showed a beta and gamma count of 48,143 c/m initially and 39,515 c/m after a 24-hour decay period. The cone encased in a 6" lead shield was removed from Cell 1 at 5:35 a.m. on May 29, 1945. Against the side of the shield the reading was >2 r/hour and at 1 meter 150 mr/hour. The carrier was found to be contaminated but after washing with citric acid the contamination was removed and the carrier loaded on the truck.

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