ML11326A171

Request for Amendment to University of Utah Triga Reactor Technical Specification 3.5, Ventilation System, Specification 1, and to TS 4.4, Confinement, Basis

ML11326A171
Person / Time
Site:	University of Utah
Issue date:	11/17/2011
From:	Jevremovic T Univ of Utah
To:	Wertz G A Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML11326A171 (3)

Text

150 S. Central Campus Dr. MEB 2298 Salt Lake City, UT 84112 Phone: 801.587.9696 United States Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 Utah Docket 50-407 Attention:

Geoffrey Wertz

SUBJECT:

Request for the Amendment to the University of Utah TRIGA Reactor Technical Specification 3.5, Ventilation System, Specification 1, and to TS 4.4, Confinement, Basis

Dear Mr. Wertz:

The University of Utah TRIGA Reactor (UUTR) reactor staff request a change to the UUTR Technical Specification (TSs). The TSs submitted for license renewal contained two typographical errors. The pressure difference in the specification in TS 3.5, and in the Basis of TS 4.4 was incorrectly stated as 0.1 inches-of-water instead of the correct value of 0.01 inches-of-water.

The requested TS changes are described below and the proposed marked-up TSs are attached to this letter.UUTR TS 3.5. Ventilation System, Page 26: Specification 1 currently reads: The pressure difference between the reactor room and outside of the Merrill Engineering Building is larger than 0.1 inches-of-water.

Specification I should read: The pressure difference between the reactor room and outside of the Merrill Engineering Building is larger than 0.01 inches-of-water.

UUTR TS 4.4. Confinement.

Basis. Page 42: Currently it reads: The pressure difference between the reactor room and outside of the Merrill Engineering Building should be larger than 0.1 inches-of-water.

This sentence should read: The pressure difference between the reactor room and outside of the Merrill Engineering Building should be larger than 0.01 inches-of-water.

APzý1 50 S. Central Campus Dr. MEB 2298 Salt Lake City, UT 84112 THE UNI______

Phone: 801.587.9696 Explanation:

-The UUTR TSs in place prior to the license renewal review did not provide a specification for the value of the pressure difference in the reactor room. In the proposed license renewal TSs, we added a numerical value to the specification in order to describe the operation of ventilation system more precisely.

Basis-The proposed value of 0.01 inches-of-water is described in SAR Chapter 9.1.4.1 and was also stated correctly in the Basis of UUTR TS 3.5.-Historical readings from the pressure gauge are between 0.03 and 0.05 inches-of-water with the ventilation system in operational mode.-The current TS specification of larger than 0.1 inches-of-water pressure difference is not achievable in the reactor room of the Merrill Engineering Building.

Thus, the UUTR is currently not able to operate the reactor.The reasons described above explain and justify that the correct TS value for the pressure differential is 0.01 inches-of-water, and not 0.1 inches-of-water.

Sincerely, Tatjana evremovic, PhD Chair Professor in Nuclear Engineering and Director UNEP/UNEF The University of Utah Salt Lake City UT 84112 Phone: 801-587-9696 Email: Tatjana.]evremovic(&utah.edu I declare under penalty of perjury that the foregoi g is true and correct.Execu ted on -'/ --- 6[Date /-Date Sign ure 2 i-**50 S. Central Campus Dr. MEB 2298 Salt Lake City, UT 84112 Phone: 801.587.9696 cc: Mayor of Salt Lake City 451 South State Room 306 Salt Lake City, UT 84111 Dr. Thomas Parks Vice president for research 201 S. President Circle, Room 210 University of Utah Salt Lake City, UT 84112 Ms. Karen Langley Director, University of Utah Radiological Health 322 RAB University of Utah Salt Lake City, UT 84112 Dr. Cynthia Furse Associate Vice President for Research 210 President Circle, Room 210 University of Utah Salt Lake City, UT 84112 Dr. Richard Brown Dean, College of Engineering 72 S. Central Campus Dr., 1650 WEB University of Utah Salt Lake City, UT 84112 3