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Title:
LETTER TO R D EVANS, SUBJECT: SOME TOLERANCES PROPOSED BY THE CHALK RIVER PERMISSIBLE DOSE CONFERENCE, SEPT. 29-30, 1949 ARE OF CONCERN TO LASL
Author(s):
LANGHAM, W H [LOS ALAMOS SCIENTIFIC LABORATORY]
Subject Terms:
HREX; HISTORY - GENERAL; PLUTONIUM
Document Location:
Location - DOE/NNSA NUCLEAR TESTING ARCHIVE Address - P.O. Box 98521 City - Las Vegas State - NV Zip - 89193-8521 Phone - (702)794-5106 Fax - (702)862-4240 Email - NTA@NV.DOE.GOV
Document Type:
CORRESPONDENCE, LETTERS, MEMOS
Publication Date:
1949 Dec 28
Declassification Status:
Declassified
Document Pages:
0003
Accession Number:
NV0709713
Originating Research Org.:
Univ. of California (United States)
OpenNet Entry Date:
1995 Feb 17
OpenNet Modified Date:
2017 Dec 21
Description/Abstract:
ALTHOUGH BRADBURY, DIRECTOR OF LASL, HAS STATED THAT THE PROTECTION OF THE WORKER SHOULD BE THE AIM OF A CONFERENCE ON TOLERANCE DOSE, LANGHAM EXPRESSES BRADBURY'S CONCERN REGARDING THE "DRASTICALLY LOW" TOLERANCE DOSES THAT WERE PROPOSED BY THE CHALK RIVER CONFERENCE FOR PLUTONIUM, POLONIUM, AND URANIUM-235. FOR EXAMPLE, LOS ALAMOS WAS OPERATING ON THE BASIS OF A 1.0 MICROGRAM FIXED BODY TOLERANCE FOR PLUTONIUM, WHEREAS THE CHALK RIVER CONFERENCE PROPOSED A FIGURE OF 0.1 MICROGRAM. IN BRADBURY'S OPINION, THESE LOW LIMITS WOULD INTERFERE WITH OPERATIONS AT LOS ALAMOS. LANGHAM ASKS EVANS TO GO OVER CALCULATIONS FOR THE THEORETICAL TOLERANCE FOR PLUTONIUM, ONE METHOD OF WHICH IS A COMPARISON TO RADIUM.