ML15251A234

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50-602, Request for Renewal of Facility Operating License R-129
ML15251A234
Person / Time
Site: University of Texas at Austin
Issue date: 08/26/2015
From: Whaley P M
University of Texas at Austin
To: Balazik M F
Document Control Desk, Japan Lessons-Learned Division
References
Download: ML15251A234 (1)


Text

D)epartmenrt of Mechanical Engineering512-232-3370-. FAX 512-471 -4.589 -http:/Iwww~me utexaseedu!/ netdIAugust 26, 2015ATTN: Document Control Desk,U.S. Nuclear Regulatory Commission,Washington, DC 20555-0001M. BalazikProject ManagerResearch and Test Reactors Licensing Branch

SUBJECT:

Docket No. 50-602, Request for Renewal of Facility Operating License R-129REF: UNIVERSITY OF TEXAS AT AUSTIN -REQUEST FOR ADDITIONAL INFORMATION REGARDING THE LICENSERENEWAL REQUEST FOR THE NUCLEAR ENGINEERING TEACHING LABORATORY TRIGA MARK I1 NUCLEARRESEARCH REACTOR (TAC NO. ME7694) --July 31, 2015 correspondenceSir:Regarding inconsistencies in results of excess reactivity and control rod worth calculations in the July 15, 2015submission, two transcriptions errors have been identified in input data. Material specifications for two lightlyburned fuel elements were inadvertently copied twice from into an early core configuration. Because newelements are introduced into outer ring positions, the effect was minor and not immediately apparent. Whenirradiation and movement into a higher worth position was simulated, the effect was more significant butappeared to be trending and was therefore not identified as anomalous.Material composition is currently being recalculated with additional measures to assure quality data, and currentlynear completion. However, reactivity calculations using the data remain to be accomplished. We therefore arerequesting 90 days to complete the work (with contingencies for additional material calculations, should they berequired, included in the request.Please contact me by phone at 512-232-5373 or email whalev@~mail.utexas.edu if you require additionalinformation or there is a problem with this submittal.ThankP. M. WhaleyAssociate DirectorNuclear Engineering Teaching LaboratoryThe University of Texas at AustinI declare under penalty of perjury that the foregoing is true and correct.Executed on July 15, 2015Steven R. BiegalskiNETL Director