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- From: dpe@inel.gov (Don Palmrose)
- Subject: Re: Notch another one up for the Greennazis
- Message-ID: <1992Nov18.022052.8612@inel.gov>
- Sender: news@inel.gov
- Organization: INEL EG&G Idaho
- References: <1992Nov16.063255.4320@gn.ecn.purdue.edu> <JMC.92Nov16001311@SAIL.Stanford.EDU> <JMC.92Nov17160634@SAIL.Stanford.EDU>
- Date: Wed, 18 Nov 92 02:20:52 GMT
- Lines: 43
-
- In article <JMC.92Nov17160634@SAIL.Stanford.EDU>, jmc@SAIL.Stanford.EDU (John McCarthy) writes:
- >
- > While we aren't using the plutonium in our spent fuel rods, we aren't
- > throwing it away either.
- >
- > Can any of the nuclear engineers say how much fissionable material there
- > is between the plutonium and leftover U-235 compared to the original
- > content of U-235 in the enriched uranium used as fuel?
- > --
- > John McCarthy, Computer Science Department, Stanford, CA 94305
- > *
- > He who refuses to do arithmetic is doomed to talk nonsense.
- >
- >
- >
-
- In commerical power reactors, the fuel begins with between 2 and 3.5% enrich-
- ment in U235. They vary the enrichment loading throughout the core for a
- better power distribution. When spent fuel is removed, the % left also varies
- depending on what they are allowed for their burn-up rating. If my memory
- is correct the U235 % is less than 0.5%. What percent the Pu makes also
- depends on the allowed burn-up but roughly 20% of the power generated in a
- fuel assembly prior to removal is due to Pu.
-
- Hope this helps.
-
- Don Palmrose
-
-
-
-
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