[FPSPACE] German Expert Discounts Risk From Old Soviet Satellite

[David Woods]

-------- Original Message --------
Subject: 	RE: Re: [FPSPACE] German Expert Discounts Risk From Old Soviet 
Satellite
Date: 	Tue, 27 Jan 2009 07:17:41 -0600
From: 	Nicholas Johnson
To: 	David Woods <drwoods1 at earthlink.net>
References: 	<497E4AE5.2030903 at earthlink.net>



Dave,
 
Thanks for the two pieces.  The one below is a totally incorrect 
analogy.  The article by Heiner Klinkrad is OK (except for the 
accompanying photo), but we never said there was a "risk".
 
Nick
 
-------- Original Message --------
Subject: 	Re: [FPSPACE] German Expert Discounts Risk From Old Soviet 
Satellite
Date: 	Mon, 26 Jan 2009 11:50:23 -0800 (PST)
From: 	Allen Thomson <thomsona at flash.net>
Reply-To: 	thomsona at flash.net
To: 	fpspace at friends-partners.org


> Is it really true that these reactors will decline in risk
> over 20 years by a factor of 1000? 

Details will vary with the composition of the fuel and degree of burn-up, but one source 
(http://www.world-nuclear.org/info/inf60.html) says of spent commercial power reactor fuel,

 "... there is a cooling period of 20 to 50 years between removal from the reactor and 
disposal, with the conditioned spent fuel or conditioned HLW being retained in interim 
storage. This is because the level of radioactivity and heat from the used fuel fall 
rapidly in these years down to about one thousandth of the level at discharge in 40 years."


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