Document Details

Title:

NEUTRON AND GAMMA-RAY LEAKAGE FROM THE ICHIBAN CRITICAL ASSEMBLY

Author(s):

THORNGATE, J H; JOHNSON, D R; PERDUE, P T

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:

1966 Jun 30

Declassification Status:

Never classified

Document Pages:

0060

Accession Number:

NV0015210

Document Number(s):

CEX647

Originating Research Org.:

CIVIL EFFECTS TEST ORGANIZATION

OpenNet Entry Date:

1994 Aug 26

OpenNet Modified Date:

2003 Sep 18

Description/Abstract:

THIS EXPERIMENT WAS A CONTINUATION OF STUDIES BEGUN IN 1956 TO DETERMI NE THE RADIATION DOSES RECIEVED BY THE SURVIVORS OF THE HIROSHIMA AND NAGASAKI NUCLEAR DETONATIONS. THE "ICHIBAN" CRITICAL ASSEMBLY WAS DESI GNED AND CONSTRUCTED AT LOS ALAMOS SCIENTIFIC LABORATORY TO PROVIDE A SIMULANT FOR THE HIROSHIMA BOMB WITH RESPECT TO RADIATION "LEAKAGE" AN D SPECTRUM. IT WAS OPERATED AT STEADY-STATE POWER LEVELS WHILE NEUTRON AND GAMMA-RAY DOSE MEASUREMENTS WERE MADE. THE RESULTS WERE CORRECTED FOR ROOM SCATTERING AND NORMALIZED TO DOSE PER FISSION. THE FIRST COLL ISION NEUTRON DOSE MEASURED AT A DISTANCE OF 9.5 METERS WAS 7.7 + 0.3 X 10-17 TISSUE RADS PER FISSION. COUPLED WITH THE MEAN DOSE PER NEUTRO N OF 1.14 X 10-9 RAD/NEUTRON/CM-2, THIS MEASUREMENT REPRESENTED A TOTA L FAST NEUTRON LEAKAGE OF 0.77 + 0.03 NEUTRONS PER FISSION.

<< Return to Search Results