RE: Thorium in 747

["Kolb, William (WKOLB)" <WKOLB@arinc.com>]

Do you mean depleted uranium? If so, see:



http://www.antenna.nl/wise/uranium/ruxcw.html#WORK

<http://www.antenna.nl/wise/uranium/ruxcw.html#WORK> 





Up to four-percent magnesium-thoria and nickel-thoria castings for aircraft

engines, aircraft skin panels and aircraft engine gear boxes were common by

the mid 1950s but production virtually ceased in the 1990s with the

availability of thorium-free alloys. See NUREG-1717 for a description of

uses and potential exposure.



bill

WM Kolb

ARINC









		-----Original Message-----

		From:	BRISSON Nicolas [mailto:nicolas.brisson@opri.fr]

		Sent:	Friday, March 07, 2003 11:16 AM

		To:	'radsafe@list.vanderbilt.edu'

		Subject:	Thorium in 747



		Hi all,



		I know that some Boeing 747 had thorium in their casing. 

		Does someone has data on this subjects, either figures of

activity or dose

		rate? Or could rirect me to internet links on the subject?





		Nicolas Brisson

		I.R.S.N.

		31, rue de l'Ecluse

		78110 Le Vésinet

		FRANCE

		tel: 00 (33)1-30-15-42-75





	

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