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 Shieldwerx
SWX-207HD
Self-Extinguishing Borated Polyethylene Neutron
Shielding
Features
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Self-Extinguishing Borated
Polyethylene Neutron Radiation Shielding
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Contains 0.9% Boron and 6%
Hydrogen
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Available in slabs, bricks,
rods, pellets and other custom shapes
Introduction
SWX-207HD
Self-Extinguishing Borated Polyethylene is used for neutron radiation shielding
applications where flame resistance is necessary or desired for the
installation. Its hydrogen content is slightly higher than that of SWX-201
Borated Polyethylene. Self-extinguishing materials are desirable for use in any
location requiring neutron radiation shielding where there is an issue with fire loading
and a need to reduce the amount of material contributing to the overall amount
of combustible materials. ASTM test D-635 (Flammability of Self-Supporting
Plastics) shows SWX-207HD to be self-extinguishing. ASTM Test D-2863 gives a
Limiting Oxygen Index of 30.2. In addition to the fire resistance, SWX-207HD
produces negligible smoke when exposed to flame.
SWX-207HD contains high hydrogen content to provide good characteristics for the
attenuation of fast neutrons and contains 0.9% by weight boron. It has relative
high density of 1.7 g/cc (106 lbs/cu ft), which improves its gamma radiation shielding
characteristics compared to other polyethylene based shields. SWX-207HD has
numerous applications in nuclear facilities including shielding hatches, ducts,
sumps, stairwells, etc. SWX-207HD is available in a wide variety shapes
including slabs, bricks, rods, and pellets. Standard 1-inch
thick material is available in slabs up to 48” x 96”. It is easily shaped and
cut using ordinary woodworking
and metalworking tools. Shieldwerx can custom machine SWX-207HD to your
specifications.
Specifications
Composition Data
Hydrogen atom density / cm3: 6.15 x 1022
Hydrogen weight % density: 6.0 %
Natural isotope distribution: 99.98 % 1H
Boron atom density / cm3: 8.14 x 1020
Natural isotope distribution: 19.6 % 10B and 80.4 % 11B
Weight percent of all isotopes of boron: 0.86 %
Total Density: 1.7 g / cm3 (106 lbs. / ft3)
Radiation Properties
Macroscopic thermal neutron cross section: 0.41 (cm-1)
Gamma resistance: 5 x 108 rad
Neutron resistance: 2.5 x 1017 n / cm2
Physical Properties
State: Bricks, slabs, cylinders
Color: Grey/Green
Odor: No odor
Machinability: Excellent
Thermal Properties
Recommended Temperature Limit: 200 °F (93.3 °C)
Chemical Properties
Chemical Name & Synonyms: Borated Polyethylene
Trade Name & Synonyms: SWX-207HD
Chemical Family: Polyolefin's
Formula: Mixture (CH2)n, B
Solubility in Water: Negligible
Available Sizes
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Borated Sheets
(Polyethylene-Base) |
Width |
Length |
Thickness |
|
Inch |
mm |
Inch |
mm |
Inch |
mm |
|
SWX-207HD-U |
24 |
610 |
24 |
610 |
1 |
25 |
|
SWX-207HD-R |
48 |
1219 |
48 |
1219 |
1 |
25 |
|
SWX-207HD-G |
48 |
1219 |
96 |
2438 |
1 |
25 |
|
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Custom sizes and thicknesses are available |
Technical Information
Other Shieldwerx Shielding Products
For more information or to request a quotation,
please contact us
by phone at: (865)
947-5123 or by email at:
sales@deqtech.com.
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Copyright 2005-2011 © DEQ Technical Sales, LLC