March 29th, 2011- Isotopic make up of spent fuel 5% enrichment

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From: Frazier, Alan
Sent: Tuesday, March 29, 2011 4:59 PM
To: Batkin, Joshua; Schmidt, Rebecca
Subject: Iso topic make up of spent fuel


I believe this is for typical spent fuel (initially 5 percent enrichment) not MOX. Sorry for the late response.


From: Rahimi, Meraj
To: Frazier, Alan; Weaver, Doug
Cc: Ordaz, Vonna
Sent: Tue Mar 29 16:53:01 2011
Subject: RE: NEW Deadline 4:30pm Isotopic make up of spent fuel

Here is the inventory for isotopes more than one percent of total. I made a number of assumptions which I can let you know later:
Isotope      Curies/MTHM      %Total
SR 90          81300                      7.84
Y 90            81300                     7.84
RU106        71500                    6.89
RH106        71500                    6.9
CS134         96770                    9.33
CS137        125000                  12.12

Meraj Rahimi

Chief of Criticality, Shielding, and Dose Assessment Branch
Division of Spent Fuel Storage and Transportation
Office of Nuclear Materials Safety and Safeguard
U.S. Nuclear Regulatory Commission
6003 Executive Blvd., Suite 301
Rockville, MD 20852
Phone: 301-492-3338
Fax: 301-492-3348
e-mail: [email protected]

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