ML121010109

University of Missouri, Columbia - Request for Additional Information, License Amendment Dated August 24, 2011 Safety Limits

ML121010109
Person / Time
Site:	University of Missouri-Columbia
Issue date:	04/12/2012
From:	Alexander Adams Research and Test Reactors Licensing Branch
To:	Rhonda Butler Univ of Missouri - Columbia
Adams, A 415-1127
References
TAC ME7018
Download: ML121010109 (4)

Text

April 12, 2012 Mr. Ralph Butler, Director Research Reactor Center University of Missouri-Columbia Research Park Columbia, MO 65211

SUBJECT:

UNIVERSITY OF MISSOURI - COLUMBIA - REQUEST FOR ADDITIONAL INFORMATION, RE: LICENSE AMENDMENT, SAFETY LIMITS (TAC NO.

ME7018)

Dear Mr. Butler:

We are continuing our review of your amendment request for Facility Operating License No.

R-103 for the University of Missouri - Columbia Research Reactor which you submitted on August 24, 2011. During our review of your amendment request, questions have arisen for which we require additional information and clarification. Please provide responses to the enclosed request for additional information within 45 days of the date of this letter.

In accordance with Title 10 of the Code of Federal Regulations (10 CFR), Section 50.30(b), you must execute your response in a signed original document under oath or affirmation. Your response must be submitted in accordance with 10 CFR 50.4, Written Communications.

Information included in your response that is considered security, sensitive, or proprietary, that you seek to have withheld from the public, must be marked in accordance with 10 CFR 2.390, Public inspections, exemptions, requests for withholding.

If you have any questions regarding this review, please contact me at (301) 415-1127.

Sincerely,

/RA/

Alexander Adams, Jr., Senior Project Manager Research and Test Reactors Licensing Branch Division of Policy and Rulemaking Office of Nuclear Reactor Regulation Docket No. 50-186

Enclosure:

As stated cc w/encl: See next page

ML121010109 l NRR-088 OFFICE PRLB:PM PRLB:LA PRLB:BC PRLB:PM NAME AAdams GLappert JQuichocho AAdams DATE 4/12/12 4/11/2012 4/12/12 4/12/12 University of Missouri-Columbia Docket No. 50-186 cc:

John Ernst, Associate Director Regulatory Assurance Group Research Reactor Facility Columbia, MO 65201 Homeland Security Coordinator Missouri Office of Homeland Security P.O. Box 749 Jefferson City, MO 65102 Planner, Dept of Health and Senior Services Section for Environmental Public Health 930 Wildwood Drive, P.O. Box 570 Jefferson City, MO 65102-0570 Deputy Director for Policy Department of Natural Resources 1101 Riverside Drive Fourth Floor East Jefferson City, MO 65101 A-95 Coordinator Division of Planning Office of Administration P.O. Box 809, State Capitol Building Jefferson City, MO 65101 Test, Research, and Training Reactor Newsletter University of Florida 202 Nuclear Sciences Center Gainesville, FL 32611

OFFICE OF NUCLEAR REACTOR REGULATION REQUEST FOR ADDITIONAL INFORMATION REGARDING LICENSE AMENDMENT REQUEST FOR THE UNIVERSITY OF MISSOURI - COLUMBIA RESEARCH REACTOR LICENSE NO. R-103; DOCKET NO. 50-186 We are continuing our review of your amendment request for Facility Operating License No.

R-103 for the University of Missouri - Columbia Research Reactor which you submitted on August 24, 2011. During our review of your amendment request, questions have arisen for which we require additional information and clarification. Please provide responses to the following requests for additional information (RAI) within 45 days of the date of the letter.

1. The axial peaking factor was changed from 1.432 in the previous analysis to a new value of 1.2958 in the new analysis. Please provide a justification for this change and a basis for the revised axial peaking factor.

2. The new Safety Limit Analysis for MURR (Application Attachment 11), Section F.4 assumes that the center test hole contains only moderator. It appears that this analysis does not address the effect of irradiation samples and experiment test tube canisters in the center test hole on the core heat flux. Please provide a summary of the effect of irradiation samples and canisters in the center test hole on the heat flux profile used for the hot channel factors of Table F.4.

3. The enthalpy rise and heat flux factors contain a new additional allowable peaking factor of 1.062. It appears that this new factor is not described or justified in the application submittal. Please provide additional information justifying the use and the magnitude of the additional peaking factor.

4. There appears to be several changes in your proposed TSs that are not discussed in your amendment application. For example, the word water is added to TS 2.1 a. Please describe and justify all requested changes to your TSs.

5. Attachment 12 of your amendment application discusses a Case 1 severe power transient and concludes that ample safety margin exists for safety system reaction time. Please describe this transient in detail which supports your conclusion.

ENCLOSURE