Document Details


Title:
RADIOACTIVE CONTAMINATION OF VENTILATION SUPPLY SYSTEM, USS CRITTENDEN, FROM BAKER EXPLOSION OPERATION CROSSROADS, FINAL REPORT
Author(s):
HOLDEN, F R [UNITED STATES NAVAL RADIOLOGICAL DEFENSE LABORATORY]; SKOW, R K [UNITED STATES NAVAL RADIOLOGICAL DEFENSE LABORATORY]; OWINGS, A F [UNITED STATES NAVAL RADIOLOGICAL DEFENSE LABORATORY]; EVANS, E C [UNITED STATES NAVAL RADIOLOGICAL DEFENSE LABORATORY]; WORSHAM, M L [UNITED STATES NAVAL RADIOLOGICAL DEFENSE LABORATORY]
Subject Terms:
CROSSROADS OPERATION; BAKER-0746 EVENT; SHIPS; CONTAMINATION; DUSTS; GAMMA DETECTION; PHOTOGRAPHIC FILM DOSEMETERS; DOSE RATES; RADIOACTIVE AEROSOLS; UNDERWATER EXPLOSIONS; RESEARCH PROGRAMS; BETA DETECTION; AIR FILTERS; SAMPLING; ALPHA DETECTION; DATA; PARTICLE SIZE
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:
REPORT
Publication Date:
1950 Feb 14
Declassification Status:
Declassified
Document Pages:
0050
Accession Number:
NV0051296
Document Number(s):
NRDL551
Originating Research Org.:
UNITED STATES NAVAL RADIOLOGICAL DEFENSE LABORATOR
OpenNet Entry Date:
1994 Aug 26
Description/Abstract:
DUST IN THE VENTILATION SYSTEM OF THE AFTER ENGINE ROOM OF THE USS CRI TTENDEN WAS CONTAMINATED BY THE BASE SURGE FROM THE BAKIER EXPLOSION A T OPERATION CROSSROADS. ALTHOUGH ALL VENTILATION SYSTEM OPENINGS ON TA RGET SHIPS WERE SEALED PRIOR TO THE BAKER EXPLOSION, THERE WAS DAMAGE TO THE COVER ON THE SYSTEM FOR THE AFTER ENGINE ROOM OF THE USS CRITTE NDEN. THE DAMAGE TO THE COVER CONSISTED OF AN OPENING APPROXIMATELY SI X SQUARE INCHES IN AREA. THE DUST IN THE CONTAMINATED VENTILATION SYST EM WAS RECOVERED AND THE AMOUNT AND COMPOSITION OF THE RADIOACTIVE CON STITUENTS WERE MEASURED. THE RADIOACTIVE CONTAMINATION AS FUNCTION OF PARTICLE SIZE OF THE DUST WAS ALSO DETERMINED. ONE AND ONE HALF YEARS AFTER THE BAKER EXPLOSION, FISSION PRODUCTS EQUIVALENT TO 115 MICROCUR IES OF RADIOACTIVITY WERE RECOVERED FROM THE DUST. IT WAS CALCULATED F ROM RADIOCHEMICAL ANALYSIS AND FISSION PRODUCT DECAY SCHEMES THAT APPR OXIMATELY 370 CURIES ENTERED THE VENTILATION SYSTEM FROM THE BASE SURG E. THE CORRESPONDING ALPHA ACTIVITY WAS 0.43 MICROCURIE. IT WAS ALSO F OUND THAT 18 PERCENT OF THE DUST BY WEIGHT WAS OF RESPIRABLE PARTICLE SIZES ( LESS THAN FIVE MICRONS ) AND THAT IT CARRIED ABOUT 160 CURIES OF THE TOTAL RADIOACTIVITY. FILM BADGE MEASUREMENTS OF GAMMA RADIATION EXPOSURE IN THE AFTER ENGINE ROOM OF THE USS CRITTENDEN DURING THE BA KER TEST SHOWED A MAXIMUM VALUE OF 40 R. IT MAY BE CONCLUDED THAT IF P ERSONNEL HAD BEEN STATIONEDIN THE AFTER ENGINE ROOM THEY WOULD HAVE BE EN LITTLE AFFECTED BY THE GAMMA RADIATION FROM THE ATOMIC BOMB DETONAT ION. HOWEVER, THE VENTILATION SYSTEM FRO THE AFTER ENGINE ROOM WOULD H VE DRAWN IN ENOUGH RADIOACTIVE AEROSOL, WITH ITS ASSOCIATED BETA AND G AMMA RADIATION, TO IMMOBILIZE AND KILL THE OCCUPANTS.


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