[ RadSafe ] Re:Source in Twin towers
Richardson David (RDE) Colchester Hospital University NHS Foundation Tr
David.Richardson at colchesterhospital.nhs.uk
Tue Oct 6 03:30:30 CDT 2009
Yes, some large aircraft have crashed (fairly recently) that had DU
counterweights. 747 crashes at Stansted (UK) and Amsterdam (NL) spring
MTO Radiation Protection
Essex County Hospital
+44 (0)1206 744579
david.richardson at colchesterhospital.nhs.uk
From: radsafe-bounces at radlab.nl [mailto:radsafe-bounces at radlab.nl] On
Behalf Of Geo>K0FF
Sent: 05 October 2009 17:40
To: radsafe at radlab.nl; Clayton J Bradt
Subject: Re: [ RadSafe ] Re:Source in Twin towers
Have any large planes crashed that DID contain the DU for
>From a chart on DU counterweights:
DC-10 1000 kg
L-1011 680 kg
747- 850 kg
Additionally, many aircraft parts, including engines are made with
All thorium isotopes are radioactive.
Cd-109, Am-241, Fe-55 could be present in industrial gauges had any been
stored in any of the offices in New York.
It is unlikely that the fire protection system's smoke detectors used
Am-241, as most modern industrial detectors use the photoelectric
and other non radioactive methods. It is likely that any extra battery
operated smoke detectors installed by the tenant DO contain Am-241.
if Pyrotronics industrial smoke detectors happened to have been used in
central system, they contain 80 uCi of Am 241 each.
Don't get me wrong, I am not a DU alarmist. I actually use DU in my
shielding and as a beta source.
Other building materials of concern are asbestos ( used to fireproof
supports) and mercury ( 1 drop in every fluorescent lamp) One could
that a substantial puddle of liquid mercury existed at the lowest point
Pictures of thorium airplane parts, counterweights etc. by request. All
taken by myself and with radiation detection equipment shown.
New London Nucleonics Lab
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