Document Details

Health Division and Biological Section of Research Division Report for the Month of February 1946
Subject Terms:
Barium Separations Building; Building 706-D; ORNL, medical, health physics; biological, report, 1946; neutrons, gamma rays; plutonium, White Oak Creek
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; Science and Technology\Biology and Medicine
Document Type:
Publication Date:
1946 Feb 28
Declassification Date:
1953 May 28
Declassification Status:
Document Pages:
Accession Number:
Document Number(s):
MonH-73, Copy 8A
Originating Research Org.:
Clinton Laboratories
OpenNet Entry Date:
1998 Jun 16
This document is a report for the Health Division and Biological Section of the Research Division for the month of February 1946. There has been no change in the rate of pre-employment, termination or annual physical examinations. A new routine was begun on 2-1-46 where blood and urine analyses were to be performed on restricted area personnel once every 3 months, and once a year for all other personnel. The original medical records of Clinton Laboratories' personnel employed prior to 7-1-45 were finally transferred to the University of Chicago on 2-13-46. There were two meetings of the Activity Hazards Committee during this month, and it was believed that these meetings demonstrated the necessity for continued vigilance in order to prevent serious incidents. They also demonstrated their value in pointing out desirable changes or additions to the plant which might be overlooked by individual groups considering only their own local problems. Experiments were completed on the effects of small daily doses of fast neutrons and gamma rays on Strain C58 mice. Except for a very few doubtful cases, none of the irradiated animals developed leukemia, and it could be concluded that the periodic irradiation as given retarded rather than advanced the onset of leukemia. In all cases, the irradiated animals died sooner than their controls. An examination of the data showed that the animals receiving 1.15 n/day of fast neutrons produced about the same effect as 17.2 r/day of gamma rays as far as survival is concerned, while 8.6 r/day of gamma rays produced a much smaller effect. Evidence obtained indicated as far as the whole animal is concerned, there is a qualitative difference of effect between fast neutrons and gamma rays. The photographic emulsion technique was developed for detecting plutonium in urine. The mud activity along White Oak Creek was shown to decrease exponentially with increasing distance from the settling basin. The concrete floor in front of the lead cells in the Barium Separations Building (706-D) became badly contaminated, and it finally became necessary to cover the area with six inches of concrete. Concrete was also poured around the bases of tanks A1, A5 and A6 to reduce the level of radiation in cell A.

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