United States Geological Survey - *REDACTED* - Response to ...

U USGS

sciencefor achangingworld Department of the Interior

US Geological Survey PO Box 25046 MS 974 Denver, CO 80225-0046

February 8, 2013 U.S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555

Reference: U.S. Geological Survey TRIGA Reactor (GSTR), Docket 50-274, License R113, Request for Additional Information (RAI) dated October 2, 2012

Subject: Follow-up responses from questions of phone conference on 12/20/12

Mr. Wertz: Responses to questions from the reference phone conference are provided in the enclosed pages. Please contact me iffurther details, or corrections, are needed.

Sincerely,

Tim DeBey USGS Reactor Supervisor I declare under penalty of perjury that the foregoing is true and correct. Executed on 2/8113

Attachment Copy to:

Betty Adrian, Reactor Administrator, MS 975 USGS Reactor Operations Committee

1

GSTR RAI Responses: February 8, 2013

9. Core map showing the contents of the core lattice positions for the LCC and the OC:

Figure 1, limiting core configuration core layout

control rods old 8.5 wt% fuel old 12 wt% fuel Al clad fuel 53.023 cm 3.75 cm

Figure 2, operating core configuration core layout 2

? The enrichment and cladding type for fuel elements used at the GSTR o Aluminum & stainless steel clad ................
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