RE:

[SSORG_IT@nv.doe.gov]

Franz,

Thanks for your reply.  The exact dial I am searching for information on
was mounted on a Navy Wind Radar Pedestal.  The Pedestal was placed in
the salvage yard some years ago, the dial was broken, and subsequently
contaminated the Pedestal and the trailer it was mounted on.

I am trying to make an estimate of Curie activity so I may ship it....It
has a contact reading of 2.5 mR/hr.

My first message should have been clearer, but it was the first one I've
sent !


	-----Original Message-----
	From:	Franz Schoenhofer [SMTP:schoenho@via.at]
	Sent:	Wednesday, September 09, 1998 1:23 PM
	To:	Multiple recipients of list
	Subject:	Re: 

	At 13:51 09.09.1998 -0500, you wrote:
	>I am interested in the range of  Ra-226 activity present in
various
	>switches, dials, and gauges.  Any information on typical Ra-226
activity
	>levels in these various article would be appreciated.
	>
	>Thanks for the information.
	>
	>Email ssorg_it@nv.doe.gov
	---------------------------------------------------

	In Europe the use of Ra-226 is to my knowledge in (almost) all
countries
	not allowed any more for these purposes. Ra-226 can therefore
only be found
	in very old devices. It has been replaced for instance in dials
by Pm147
	and especially tritium. The trend is even to replace tritium in
dials by
	phosphorescent material, which will of course not glow after
some hours in
	the dark. Ra-226 in the devices you mentioned is now regarded as
a
	curiosity, which is much aftersought by some radiation
protection experts
	who are interested in the history of radiation protection,
including me.

	Best regards,

	Franz

	 
	Franz Schoenhofer
	Habicherg. 31/7
	A-1160 Vienna
	Austria
	Tel.: +43-1-495 53 08
	Fax.: same number
	mobile phone: +43-664-338 0 333
	e-mail: schoenho@via.at

	Office:
	Federal Institute for Food Control and Research
	Department of Radiochemistry
	Kinderspitalg. 15
	A-1095 Vienna
	Austria
	Tel.: +43-1-40 491 520
	Fax.: +43-1-40 491 540
	e-mail: schoenhofer@baluf.via.at
	
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