THE GODIVA II CRITICAL ASSEMBLY: DOSIMETRY FOR BIOLOGICAL RESEARCH

Technical Report · Sun Jan 01 04:00:00 EST 1961

OSTI ID:4751537

Sayeg, J A

The Los Alamos Godiva II critical assembly is a bare reactor of approximately 60 kg enriched U/sup 236/. The assembly can be used as a burst facility delivering up to 20,000 tissue rads in a 70 mu sec pulse, or can be used as a normal reactor delivering the same dose over a longer time. Four methods have been used to evaluate the neutron and gamma tissue dose versus distance relation. These include (1) a method employing the threshold detectors Pu/sup 239/ surrounded by 2 cm of B/sup 10/, Np/sup 237/, U/sup 238/, and S/sup 32/ for the measurement of fast neutron tissue dose a alpha d bare cadmium- covered Au/sup 197/ foils for the measurement of thermal neutron tissue dose, (2) the Hurst proportional counter for the measurement of neutron tissue dose, (3) tissue-equivalent and graphite-CO/sub 2/ ionization chambers for the measurement of neutron and gamma -tissue dose, (4) and tetrachloroethylene chemical dosimeters for the measurement of gamma -dose only, Instruments and procedures of the methods are described and the accuracy of the methods is discussed. (C.H.)

• Research Organization: Los Alamos Scientific Lab., N. Mex.
• DOE Contract Number: W-7405-ENG-36
• NSA Number: NSA-17-005774
• OSTI ID: 4751537
• Report Number(s): TID-13984; LADC-4189
• Country of Publication: United States
• Language: English

Related Subjects

BIOLOGY AND MEDICINE
BORON 10
CADMIUM
CHEMICALS
ETHYLENE
GAMMA RADIATION
GODIVA- 2
GOLD 197
GRAPHITE
INSTRUMENTS
IONIZATION CHAMBERS
NEUTRONS
ORGANIC CHLORINE COMPOUNDS
PLANNING
PLUTONIUM 239
RADIATION DETECTORS
RADIATION DOSES
REACTORS
SULFUR 32
THERMAL NEUTRONS
TISSUES
URANIUM 235
URANIUM 238