ML111751564

University of Missouri - Columbia - Request for Additional Information License Amendment, Center Test Hole (TAC N0. ME1876)

ML111751564
Person / Time
Site:	University of Missouri-Columbia
Issue date:	07/01/2011
From:	Alexander Adams Research and Test Reactors Licensing Branch
To:	Rhonda Butler Univ of Missouri - Columbia
ADAMS A, NRC/NRR/ADRA/DPR/PRTA 415-1127
References
TAC ME1876
Download: ML111751564 (4)

Text

July 1, 2011 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, CENTER TEST HOLE (TAC NO.

ME1876)

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 6, 2009, as supplemented by letters dated August 31, 2010, and January 31, 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 30 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

July 1, 2011 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, CENTER TEST HOLE (TAC NO.

ME1876)

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 6, 2009, as supplemented by letters dated August 31, 2010, and January 31, 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 30 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 DISTRIBUTION:

Public RidsNrrDpr RidsNrrDprPrta RTR r/f RidsNrrDprPrtb AAdams, NRR GLappert. NRR ADAMS Accession No: ML111751564 NRR-088 OFFICE PRLB:PM PRLB:LA PRLB:BC PRLB:PM NAME AAdams GLappert JQuichocho AAdams DATE 6/23/2011 6/28/2011 6/29/2011 7/1/2011 Official Record Copy

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 MISSOURI UNIVERSITY 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 Missouri University Research Reactor which you submitted on August 6, 2009, as supplemented by letters dated August 31, 2010, and January 31, 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 30 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.

1. Failure of the latching mechanism for the Center Test Hole Canister could potentially result in a reactivity change of 0.011 delta k/k, which is an unanalyzed condition. Please provide information to the following questions:

a. The center test hole canister is held in place by two inconel metal latching fingers. In the event of the failure of one of the fingers, can a single finger hold the canister in place under normal operations conditions? Please provide details.

b. Is there a common-mode failure that could effect both latching fingers? Please explain.

c. The application states that it is highly unlikely that an operator could inadvertently remove a fully loaded center hole test canister while at power.

Please provide further justification and a description of controls to validate this conclusion, or provide an analysis that demonstrates that the reactor can be safely shutdown following a reactivity insertion from removal of a fully loaded center test hole canister without violating the safety limit for power.

2. The bypass key circuit controlling the FIRST instrument channels provides a point of single failure. Please propose changes to address this single failure issue or provide justification as to why this condition is acceptable.