Re: question on Boral shielding

[Dave Brown <david.brown@nist.gov>]

BORAL is with out a doubt a tried and true, excellent material used for

neutron shielding.  Be cautioned though, I have experienced some

corrosion/degredation issues with this material in water saturated

environments, especially if the seal (edge welds) on the material have

failed.  There are other options for this type of environement if

needed, ie Borated Aluminum. 




> MODEL JC291 - BORAL
>
>
> Description:
>
> Boral is a uniform dispersion of a boron carbide in
>
> aluminium. The resulting sandwich has an exceptionally
>
> high cross-section for thermal neutrons and will
>
> withstand temperatures up to 540ºC.
>
>
> Chemical & Physical Properties:
>
> Boron atoms/cc: 23.8 x 1021
>
> Temperature Limit: 540ºC
>
> Density: 2.5g/cc
>
>
>
> --- "Franta, Jaroslav" <frantaj@AECL.CA> wrote:
>
> > Would anyone in Radsafe have some details on the
>
> > shielding material Boral,
>
> > that they could please send me ?
>
> > . . .
>
>
> =====
>
> -- John
>
> John Jacobus, MS
>
> Certified Health Physicist
>
> e-mail:  crispy_bird@yahoo.com
>
>
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Regards,

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Dave Brown, CHP
National Institute of Standards and Technology
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301-975-5810 - office
301-921-9847 - fax
david.brown@nist.gov
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