[ RadSafe ] Fw: [FIREBASEVOICE] Radioactive Dumping " Radioactive garden"
parthasarathy k s
ksparth at yahoo.co.uk
Thu May 17 06:49:52 CDT 2007
Dear Mr McCarn,
Following Lord Marshall of Goring, I wrote a note on "radioactivity in the garden" a few years ago. The note got wide press coverage. Though it was scientifically defendable, the anti nuclear critics felt that it was a clever way of diverting the attention to the risks of nuclear waste!
----- Original Message ----
From: Dan McCarn <hotgreenchile at gmail.com>
To: Roger Helbig <rhelbig at california.com>
Cc: radsafelist <radsafe at radlab.nl>
Sent: Thursday, 17 May, 2007 3:41:03 AM
Subject: Re: [ RadSafe ] Fw: [FIREBASEVOICE] Radioactive Dumping
Last time I checked, the Chatanooga Shale outcrops in and around
Murfreesboro. The "typical" concentration (in secular equilibrium) of
uranium in the Chatanooga Shale ranges from about 80 - 120 mg/Kg
Assuming 100 mg/Kg (0.01% U), going back to the "garden" calculation
of source term: 20m x 20m x .25m @ 0.01% U gives me about 20 Kg U in
200 Tonnes (100 cu.m) or a "typical" backyard where the children
play... Just for the Natural Uranium (238+235+234), that would be 13.7
mCi (5.0x10^8 Bq) per garden not to mention the rest of the progeny.
Total activity would be about 94 mCi per garden (3.5x10^9 Bq) for the
entire uranium/radium series.
The point is that the "background" is probably hotter than the low-level waste!
Dan W McCarn, Geologist
Albuquerque & Houston
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