ML18257A074

Univ. of Utah - Submittal of Annual Operating Report for the Period of 1 July 2017 Through 30 June 2018

ML18257A074
Person / Time
Site:	University of Utah
Issue date:	09/09/2018
From:	Lund M Univ of Utah, Salt Lake City
To:	Document Control Desk, Office of Nuclear Reactor Regulation
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Download: ML18257A074 (9)

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THEU UNIVERSITY OF UTAH Utah Nuclear Engineering Program SOS. Central Campus Drive, Suite 2298 Salt Lake City, Utah 84112 801-581-4188 Fax 801-585-5477 September 9th, 2018 U.S. Nuclear Regulatory Commission Document Control Desk Washington, D.C. 20555 To whom it may concern:

Enclosed please find the Annual Operating Report for the University of Utah TRI GA Nuclear Reactor, License No. R-126, Docket number 50-407, for the period of 1 July 2017 through 30 June 2018. This report fulfills the requirements of the TRIGA Technical Specifications 6.7 .1.

The report was generated on July 31", 2018; however, updates have been made as dosimetry results and the Radiation Safety and ALARA audit have become available.

If there are any further questions or concerns regarding this report, please contact me at (801) 581-4188.

R'.espectfully' Matthew Lund Reactor Supervisor, University of Utah Nuclear Engineering Program 50 South Central Drive, Room 1206 The University of Utah, Salt Lake City, UT 84112 Phone: 801.581.4188 E-mail: matthewl.lund@utah.edu URL: http://www.nuclear.utah.edu Cc: Xiaosong Yin, USNRC Craig Bassett, USNRC

UUTR Annual Report l July 2017 - 30 Jun 2018 The University of Utah TRIGA Reactor (UUTR)

Annual Operating Report for the period 1 July 2017 through 30 June 2018 Matthew Lund, UUTR Reactor Supervisor A.NARRATIVE Utah Nuclear Engineering Program (UNEP)

UUTR Annual Report 1 July 2017 - 30 Jun 2018

1. Operqting Experience The University of Utah TRIGA Reactor (UUTR), License No. R-126, Docket No. 50-407, was critical for 57.3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> and generated 2,448.269 kilowatt-hours of thermal energy during this reporting y~ar. The reactor was used for educational demonstrations and training, laboratory experiments, reactor systems tests, reactor power measurements and sample irradiations.

2. Changes in Facility Design No major changes to the facility occurred during this reporting period.

3. Surveillance Tests Documentation of all surveillance activities is retained and stored by the facility.

a. Control Rod Worth Table 1. Summarv of control rod worth, SDM, and ER Core Configuration #24-B #24-B #24-B Date 8/10/17 3/28/18 6/07/18 Worth($) Worth($) Worth($)

Safety Rod 2.213 2.270 2.297 Shim Rod 1.473 1.510 1.503 Rel!Ulating Rod .283 .287 .287 Excess Reactivity .613 0.693 .663 Shutdown Margin . 1.056 1.103 1.126

b. Control Rod Inspection The biennial control rod inspection was performed during May of 2018. All controls rods are in good condition and clean, moving freely in housing. All control rod drives function correctly.

c. Reactor Power Level Instrumentation Calorimetric power calibrations were performed on 8/3/17, 2/23/18, and 6/7/18 with the r~sults shown in Table 2. All calibrations were within 5% of actual power, so no power channel adjustments were required. The additional calibration on 6/7/18 was completed after fuel inspection to verify power levels.

Table 2. Summary of calorimetric power calibrations-Date Percent Power Linear Power Therrn,al Calculated Indication Indication Power Level 8/3/17 89.6 90.0 89.0 2/23/18 88.9 90.0 87.2 6/7/18 91.5 90.0 94.1 Utah Nuclear Engineering Program (UNEP) 2

UUTR Annual Report 1 July 2017 - 30 Jun 2018

d. Fuel Inspection The biennial fuel inspection was performed during May and June of 2018.

Fuel elements were in good condition, matching condition from the previous inspection.

e. Fuel Temperature Calibration Fuel temperature circuits were calibrated on 8/15/17 and 2/23/18. The circuits were calibrated to less than or equal to 2°C error over the range from 20 °C to 400 °C.

f. Reactor S~fety Committee (RSC) Audits Three RSC audits were completed during this reporting period. The data are shown in Table 3. No significant deviations from normal operating practices were identified by these audit~.

Tiable 3. Audi1tsummary Audit Period Auditor Operation and 1 Jan. 2017 to 30 Jun. 2017 James M. Byrne Maintenance Radiation Safety and 1/1/2017 to 8/28/2018 Mary J. Handy ALARA Operation and 1 Jul. 2017 to 31 Dec. 2017 James M. Byrne Maintenance

g. Environmental Surveys Eight environmental monitors are located in the areas surrounding the UUTR.

A maximum exposure of 43 mrem in a quarter to an environmental dosimeter located in the Building 80 was measured. Table 4 shows the average dose recorded in last five years.

Table 4. Summary of environmental monitoring around the UUTR Year Average quarterly readings for the 8 environmental monitors (mrem) 2017 31.78 2016 31.18 2015 32.06 I

2014 33.81 2013 33.88 2012 35.56 2011 35.13 B. ENERGY OUTPUT The UUTR reactor was critical for 57.3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> and produced 0.102 megawatt*days (2,448.269 kilowatt*hours) of energy during this reporting period. Since initial criticality, the reactor has been operated for a total of Utah Nuclear Engineering Program (UNEP} 3

UUTR Annual Report I July 2017 - 30 J~n 2018 4,032.581 hours0.00672 days <br />0.161 hours <br />9.606481e-4 weeks <br />2.210705e-4 months <br /> with an accumulated total energy output of 9.518 megawatt*days (228,430.082 kilowatt*hours).

C. EMERGENCY SHUTDOWNS AND INADVERTENT SCRAMS:

There were five inadvertent SCRAMs that occurred during this period:

12/9/16, 1/10/17, 1/17/17, and two on 4/6/17, because of erratic indication when operating the linear power selectpr switch. Summary of the inadvertent scrams and unplanned shutdowns is given in Table 5.

Table 5. Summarv of Inadvertent SCRAMS and Unvlanned Shutdowns Date Run Type Cause Action Number 9/7/17 1948 External Security system changed Reset security state from inactive to system and cleared active sending an external any state changes.

scram silrnal.

10/19/17 1950 External Irradiation sample was Sample was raised near tank arm immediately lowered detector, causing a high back into pool and radiation alarm. allowed to decay. A standing order was issued to not pull samples over 1 mRem/hr without

. RS approval.

2/28/18 1963 Linear Linear power indication Reactor power Power oscillated when operating selector switch the reactor power selector examined switch 4/13/18 1975 Linear Linear power indication Reactor power Power oscillated when operating selector switch the reactor power selector examined switch 6/11/18 1982 Linear Linear power indication Reactor power Power oscillated when operating selector switch the reactor power selector examined switch D. MAJOR MAINTENANCE

• The fission counter connectors were replaced.

• The pool tank was cleaned along, and the Thermal Irradiator (Tl) was cleaned of dirt that had fallen into the TI, causing small contamination during neutron activation analysis.

• The shim rod down limit switch was examined. The connecting rod was replaced and a new limiter switch was ord~red.

Utah Nuclear Engineering Program (UNEP) 4

UU1R Annual Report 1 July 2017 - 30 Jun 2018 E. CHANGES, TESTS AND EX,,ERIMENTS PURSUANT TO 10 CFR 50.59 None.

F. REACTOR SAFETY COMMITTEE As of the end of the reporting period, the current members of the RSC as designated by the Licensee are as follows:

James M. Byrne, Chair Matthew Lund, Reactor Supervisor Fred Monette, RSO of University of Utah Michael Barber, Department Chair of Civil Engineering Donald Wall Benjamin Huffman Ryan Schow Greg Moffitt The UNEP staff continues to review and update facility documentation to assure compliance with all applicable regulations.

G~ RADIOACTIVE EFFLUENTS

1. Liquid Waste Total activity released: none

2. Gaseous Waste Total estimated activity released: 30.481 µCi.

The UUTR was operated for 57.3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> at power levels up to approximately 90 kW. At this power lev~l Ar-41 production is substantially below MPC values for unrestricted areas. The minimum detectable concentration of Ar-41 from the CAM system for the stack monitor has been found to be less than two-third of 10 CPR 20 appendix B limits for r~lease to unrestricted areas.

The average annual calculated concentration of Ar-41 generated during operation is estimated to be 1.35x10-10 µCi/ml that is approximately 0.0045 %

of the DAC. The total amount of Ar-41 released was estimated to be 22.102

µCi. No phosphorus-32 was released from the UUTR and associated facilities during this period. The total amount of all gaseous radioactivity released was estimated to be 30.481 µCi. A monthly summary of gaseous releases is given in Ta\)le 6. Total activity of gaseous effluent was therefore 30.481 µCi.

Table 6. Summary of Monthly Gaseous Radioactive Effluent Month Power Ar-41 (µCi) Ar-41 (µCi/ml) Estimated Release %ofDAC (kWh) P-32 and all others Jul 17 43.516 0.542 2.4096 X 10-12 0 '0.0001%

Aug 17 303.69 .3.781 1.6816 X 10-ll 0 0.0006%

12 Sep 17 56.661 0.705 3.1375 X 10- 0 0.0001%

Oct 17 59.67 0.743 3.3041 X 10-12 0 0.0001%

Nov 17 53.42 '0.665 2.9581 X IQ- 12 0 0.0001%

Utah Nuclear Engineering Program (UNEP) 5

UUTR Annual Report 1 July 2017 - 30 Jun 2018 Dec t'7 46.13 0.574 2.5544 X 10-12 0 0.0001%

Jan 18 119.99 1.494 6.6443 X 10-12 0 0.0002%

Feb 18 325.d26 4.047 1.7998 X 1()-ll 0 0.0006%

Mar18 327.357 4.076 1.8127 X 10-ll 0 0.0006%

Apr 18 828.195 10.311 4.586 X 10-11 0 0.0015%

May 18 0 0.000 0 0 0.0000%

Jun 18 284.614 3.543 1.576 X 10-ll 0 0.0005%

Total 2448.269 30.481 1.3557E-10 0 0.0045%

3. SoUd Waste - Total activity: None No solid waste material was sent to the Radiation Safety for disposal during the period of 1 July 2017 through 30 June 2018.

H. PERSONNEL RADIATION EXPOSURES UNEP Personnel The University of Utah Radiation Safety has issued to all personnel with duties in the reactor laboratory on either a regular or occasional basis an OSL dosimeter. The duty category and monitoring period of personnel are summarized in Table 7. A summary of the whole-body exposures to the UNEP personnel is presented in Table 8.

Measured Doses 7/1/17-6/30/18 Doses: 6 mrem average; 14 mrem highest measured Dose Equivalent Limit Maximum Permissible Dose Equivalent= 5000 mrem/year (1250/quarter).

Minimum Detectable Dose per Monthly Badge = 1 mrem.

Visitors 775 individuals visited the reactor facility during the period 1 July 2017 to 30 June 2018. None of the visitors received a measurable dose.

Table 7. Summarv ofMonitored Personnel Name Monitoring Period Duty Category Albright, Lucas 07/01/17-6/30/18 Regular Allred, Michael 07/01/17-12/31/l 7 Regular/Terminated Burak, Adam 07/01/17-12/31/l 7 Regular/Terminated Burnham, Steven 07/01/17-9/30/17 ReErnlar/Terminated Chu, David 02/01/18-6/30/18 Regular Craynor, Elliott 07/01/17-6/30/18 Regular Curtis, Jonathan 07/01/17-12/31/17 Regular/Terminated Cutic, Avdo 07/01/17-12/31/17 Regular/Terminated Faure, Quentin 07/0l/l 7a.6/30/18 Regular Utah Nuclear Engineering Program (UNEP) 6

UUTR Annual Report I July 2017 - 30 Jun 2018 Feist, Donovan 04/01/18-6/30/18 Regular Foley, Amanda 07/01/17-6/30/18 Regular Horvath, David 07/01 /16-6/30/17 Regular Jevremovic, Tatjana 07/01/17-12/31/I 7 Re!rular/Terminated Kanno, Nicholas 07/01/17-12/31/17 Re!rular/Terminated Kavouras, John 07/01/17-12/31/17 Regular/Terminated Kim, Donghoon 07/01/17-6/30/18 Regular Lintereur, Azaree 07/01/17-9/30/17 Re!rular/Terminated Lund, Matthew 07/01/17-6/30/18 Regular Novy, Rebecca 07/01/17-12/31/17 Regular/Terminated Okabe, Parker 07/01/17-6/30/18 Regular Palmer, Alan 07/01/17-12/31/l 7 Regular/Terminated Pappas, Steven 02/01/18-6/30/18 Regular Porter, JoCee 07/01/17-9/30/17 Re!!Ular/Terminated Porter, Aaron 02/01/18-6/30/18 Regular Reifsnyder, 02/01/18-6/30/1~ Regular Alexander Reinhart, Cameron 07/01/17-6/30/18 Regular/Terminated Romero, Rachel 07/01/17-12/31/17 Re!llilar/Terminated Saenz, Brittney 07/01/17-6/30/18 Regular Schow, Ryan C 07/01/17-12/31/17 ,Re!llilar/Terminated Takasugi, Cole 07/01/17-12/31/17 Regular/Terminated Taylor, Bryan 02/01/18-6/30/18 Regular Thomas, Bryce 07/01/17-12/31/l 7 Regular/Terminated Thomas, Ryan 07/01/17-12/31/l 7 Regular/Terminated Tuttle, Jacob 07/01/17-9/30/17 Regular/Terminated Ulloa, Carlos 02/01/18-6/30/18 Regular Winkle, Samantha 07/01/17-9/30/17 Regular/Terminated Utah Nuclear Engineering Program (UNEP) 7

UUTR Annual Report I July20l7-30Jun20I8 Table 8. Summary of whole bodv exrJOsures to the UNEP personnel Estimated whole body exposure Number of individuals in range (rem) each range Less than 0.1 36 0.10 to 0.25 0 0.25 to 0.50 0 0.50 to 0.75 0 0.75 to 1.00 0

.LOO to 2.00 0 2.00 to 3.00 0 I

3.00 to 4.00 0 4.00 to 5.00 0 Greater than 5 rem 0 I. LABORATORYSURVEYS

. Monthly surveys of the facility were cond'1cted by the University of Utah Radiation Safety during the reporting period. The surveys have not indicated any unusual radiation levels over previous years. Records of surveys are retained by the facility.

J. ENVIRONMENTALSTUDIES Environmental monitoring conducted by the University of Utah Radiation Safety indicated no unusual dose rates in the areas surrounding the Merrill Engineering Building, which houses the UUTR reactor facility.

Prepared by: Matthew Lund Date: 7/31/2018 Reactor Supervisor Updated by: Matthew Lund Date: 9/06/2018 Reactor Supervisor Submitted by: Matthew Lund Date: 9/06/20i8 Reactor Supervisor Utah Nuclear Engineering Program (UNEP) 8