Document Details

Health Physics Division Progress Report on the Particle Problem
Cheka, J S [ORNL, Carbide and Carbon Chemicals Corp, AEC]; McAlduff, H J [ORNL, Carbide and Carbon Chemicals Corp., AEC]
Subject Terms:
ORNL, particle, stack, filter; air monitor, geometry, UO-2; density, V-263; filtron, radio-autograph; progress report
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\Environmental Effects; Science and Technology\Geology, Hydrology, Seismology, Site Studies
Document Type:
Publication Date:
1948 Sep 10
Declassification Date:
1980 Jan 30
Declassification Status:
Document Pages:
Accession Number:
Document Number(s):
ORNL-146, TID-1116
Originating Research Org.:
Atomic Energy Commission
OpenNet Entry Date:
1998 Jun 16
This document concerns the Health Physics Division Progress Report on the Particle Problem. Specific activities of three UO-2 particles from the pile exhaust air duct were determined. The particles were isolated from the "junior" filter pad which was removed on July 21. Dimensions were measured by means of a Filar micrometer. The particles were then dissolved on Pt discs with nitric acid. After evaporation, the discs were counted for B-Y and a. On August 10, 1948, three areas previously surveyed were probed with V-263's to check particle density. Particle collection on ten 3' x 4 ' frames was continued, and particles were found not to remain in the fibre-glass mat, but to sift through. There were six burst slugs between July 19 and August 3, 1948, and none since (as of August 20). Filtron samples were taken at several locations, beginning on August 4, 1948. There are three constant air monitors, running 24 hours per day on a 7 day per week basis, drawing 5 cfm of air through a filter. These filters were radio-autographed and a particle count was taken on the radio-autographs. The 105 stack base was entered through the 115 air duct on 8/24/48 to check any possible accumulation of activity, and the level was < 500 mr/hr (4 1/2 hours after pile shut-down); the radiation level was about 1500 mr/hr at a few inches from spots on the duct walls. Tables with results are included in this report.

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