Document Details


Title:
ACCURACY AND SENSITIVITY OF FILM MEASUREMENTS OF GAMMA RADIATION - PART II. ( HEALTH PHYSICS, VOL. 9, P. 463-471, RECEIVED 8/6/62, REVISED: 11/29/62 )
Author(s):
BRODSKY, A [UNIVERSITY OF PITTSBURGH]
Subject Terms:
PHOTOGRAPHIC FILMS; RESEARCH PROGRAMS; RADIATION DOSES; CALCULATION METHODS; RADIATION EFFECTS; DATA; SENSITIVITY; AIR
Document Location:
Location - NNSA/NSO 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 - CIC@NV.DOE.GOV
Document Type:
JOURNAL ARTICLE
Publication Date:
1962 Nov 29
Declassification Status:
Never classified
Document Pages:
0009
Accession Number:
NV0067300
Originating Research Org.:
HEALTH PHYSICS
OpenNet Entry Date:
1994 Aug 26
Description/Abstract:
THE DOSE ASSIGNMENTS FROM THE 12-WEEK EXPERIMENT DESCRIBED IN PART I I N WHICH WEEKLY SETS OF DUPONT TYPE 555 FILMS WERE EXPOSED TO GAMMA RAD IATION UNDER DIFFERENT ENVIRONMENTAL CONDITIONS AND AT SEVERAL DOSE LE VELS ARE USED TO ESTIMATE THE LIMITS OF PRECISION AND SENSITIVITY OF C URRENT METHODS OF PERSONNEL MONITORING. THE STANDARD DEVIATION IN THE TOTAL DOSE ASSIGNMENT FOR A CUMULATIVE DOSE OF 120 MR DELIVERED TO TW ELVE WEEKLY FILMS, EACH EXPOSED TO 10MR, WAS PLUS OR MINUS 12.3MR; THE STANDARD DEVIATION WOULD BE NO MORE THAN PLUS OR MINUS 19MR FOR ANY D ISTRIBUTION OF THE 120 MR AMONG THE TWELVE WEEKLY FILMS. CURRENTLY AVA ILABLE FILM PROCESSING METHODS ARE SHOWN TO BE INHERENTLY CAPABLE OF M EASURING GAMMA DOSE LEVELS AS LOW AS 2 MR/WEEK TO WITHIN 25 PER CENT S TANDARD DEVIATION OR LESS OVER A PERIOD OF 52 WEEKS. THE NUMBER OF SIL VER GRAINS PRODUCED PER MR OF GAMMA RADIATION WAS FOUND TO BE SUFFICIE NT TO ALLOW THE MEASUREMENT OF FRACTIONS OF BACKGROUND DOSE LEVELS WIT H WEEKLY FILMS, IF MORE SENSITIVE METHODS OF DENSITOMETRY CAN BE DEVEL OPED. THESE ESTIMATES OF PRECISION DO NOT INCLUDE SUCH ERRORS AS UNCER TAINTIES IN CALIBRATION SOURCE STRENGTH OR FIELD MONITORING VARIATIONS THAT WOULD AFFECT ANY METHOD OF PERSONNEL MONITORING, REGARDLESS OF S ENSITIVITY OR PRECISION.


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