NEUTRON AND GAMMA DOSE DISTRIBUTION BEYOND BERYLLIUM-SOLID IRON SHIELD IN WATER

Technical Report · Thu Aug 14 04:00:00 EDT 1952

OSTI ID:4343464

Clifford, C E

The beryllium-- solid iron--water measurements were taken to aid in determining the feasibility of eliminating the boron carbide in the high- temperature regions of primary and top plug shields. A solid iron layer beyond the beryllium would become less effective as a gamma shield with increasing thickness because of the excessive production of capture gammas in and beyond the slab. This would tend to increase the over-all shield weight somewhat over that for the boron carbide shield. Measurements were taken of both the gamma and neutron dose distribution beyond the iron in the beryllium, iron, water configuration. The measurements of the gamma dose indicate the iron is quite effective for a thickness up to 20 cm. As the thickness increases beyond 20 cm the apparent relaxation length becomes very long and eventually becomes longer than that for water, which causes the dose at a fixed distance from the source to increase with replacement of water with iron. The neutron dosage measurements were taken to aid in estimating the relative transmitted dose and radiation damage beyond the solid iron as compared with that in the boron carbide design. (A.C.)

• Research Organization: Oak Ridge National Lab., Tenn.
• DOE Contract Number: W-7405-ENG-26
• NSA Number: NSA-12-008193
• OSTI ID: 4343464
• Report Number(s): CF-52-5-1(Pt.2)(Del.)
• Country of Publication: United States
• Language: English

Related Subjects

BERYLLIUM
BORON CARBIDES
CAPTURE
CONFIGURATION
CURRENTS
DENSITY
DIFFERENTIAL EQUATIONS
ELECTRIC CONDUCTIVITY
GAMMA RADIATION
IRON
MAGNETIC FIELDS
MAGNETOHYDRODYNAMICS
MEASURED VALUES
MOTION
NEUTRON BEAMS
OSCILLATIONS
PHYSICS
PLASMA
PLATES
PRESSURE
RADIATION DOSES
RADIATION EFFECTS
RELAXATION LENGTH
SHIELDING
STABILITY
SURFACES
THERMODYNAMICS
THICKNESS
WATER
WEIGHT