Document Details
Title:
THE QUESTION OF SAFE RADIATION THRESHOLDS FOR EXPOSURE OF HUMANS TO IONIZING RADIATION ( ENCL; 2 AEC EXPERTS WARN OF PERILS OF RADIATION, DTD 3/24/70, BALT NEWS AMERICAN )
Author(s):
GOFMAN, J W [LAWRENCE RADIATION LABORATORY, U. OF CA]; TAMPLIN, A R [LAWRENCE RADIATION LABORATORY, U. OF CA]
Subject Terms:
RADIATION INJURIES; RADIATION DOSES; RADIUM; NEOPLASMS; STATISTICS; MORTALITY; RADIUM 226; INTEGRAL DOSES; CALCULATIONS; DATA; BIOLOGICAL RADIATION EFFECTS; STATISTICAL MODELS; RADIATION PROTECTION; HAZARDS; PUBLIC INFORMATION
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:
REPORT
Publication Date:
1970 Apr 03
Declassification Status:
Never classified
Document Pages:
0044
Accession Number:
NV0071006
Document Number(s):
UCRL72406
Originating Research Org.:
LAWRENCE RADIATION LABORATORY, U. OF CA
OpenNet Entry Date:
1994 Aug 26
OpenNet Modified Date:
2003 Sep 18
Description/Abstract:
THE EVANS HYPOTHESIS DERIVED FROM THE STUDY OF RADIUM-EXPOSED PERSONS INCLUDES TWO MAJOR POINTS: ( A ) THE LINEAR MODEL OF RADIATION CARCINO GENESIS I S INCORRECT, AND ( B ) " PRACTICAL " AND/OR ABSOLUTE THRESHO LDS EXIST BELOW WHICH HUMAN RADIATION CARCINOGENESIS DOES NOT OCCUR. A NALYSIS PRESENTED HERE INDICATES THAT NEITHER ASPECT OF THIS HYPOTHESI S CAN BE SUPPORTED, EITHER FROM THE STUDY OF RESIDUAL RADIUM BURDEN OR FROM CUMULATIVE RAD EXPOSURE. A SIMPLE LINEAR MODEL OF CARCINOGENESIS, USING 25 RADS AS DOUBLING DOSE, IS CONSISTENT WITH THE OBSERVATIONAL MATTER OVER THE RANGE 0 - 50000 CUMULATIVE RADS. THE MARINELLI THOROTR AST EXPERIENCE IS ALSO CONSISTENT WITH THIS LINEAR MODEL. THIS CONCEPT OF A " PRACTICAL " THRESHOLD RESTS UPON A PURPORTED INCREASE IN LATEN CY ( OR LATENCY + INDUCTION ) PERIOD WITH DECREASE IN ACCUMULATED DOSE . THE ANALYSIS PRESENTED HERE INDICATES THERE IS NO SUPPORT WHATEVER F OR THE " PRACTICAL " THRESHOLD. THE OBSERVATIONS ARE CONSISTENT WITH T HE POSSIBILITY THAT LATENT PERIOD OR ( LATENT PERIOD + INDUCTION PERIO D ) MAY BE THE SAME AT 5 RADS AS AT 50000 RADS. THIS ANALYSIS IN NO WA Y ATTEMPTS TO SHOW THAT " PRACTICAL " OR ABSOLUTE THRESHOLDS ARE IMPOS SIBLE. RATHER, THE RESULTS OF ANALYSES SHOW THAT NO EVIDENCE FOR SUCH THRESHOLDS HAS BEEN PRESENTED THROUGH THE STUDIES OF RADIUM-EXPOSED PE RSONS.