ML21188A297

Univ. of Florida, Transmittal of CY2020 Annual Report

ML21188A297
Person / Time
Site:	05000083
Issue date:	06/21/2021
From:	Shea B Univ of Florida
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML21188A297 (5)

Text

UF FLORIDA Herbert Wertheim College of Engineering PO Box 116134 UF Training Reactor Facility Gainesville, FL 32611 352-294-2104 bshea@ufl.edu June 21 , 2021 ATTN: Document Control Desk Technical Specifications 6. 7 .1 U.S. Nuclear Regulatory Commission License R-56, Docket 50-83 Washington, DC 20555-0001

Subject:

CY2020 Annual Report for the UFTR Please find enclosed the UFTR annual report for calendar year 2020. This report is being submitted as required by our Technical Specifications, Section 6.7.1 .

I declare under penalty of perjury that the foregoing and attached are true and correct to my knowledge.

Executed on June 21 , 2021.

Brian Shea Reactor Manager, University of Florida Training Reactor cc: Duane Hardesty, Project Manager, NRC The Foundation for The Gator Nation An Equal Opportunity Institution

University of Florida Training Reactor Annual Report for Calendar Year 2020 The following annual report is submitted in accordance with Section 6.7.1 of the UFTR Technical Specificatio ns.

Summary of Reactor Operations:

Total Energy Output for CY2020: 4,056 kW-hrs Cumulative Energy Output Since Conversion to LEU: 62,666 kW-hrs Periodic routine reactor operations were conducted through the first quarter of CY2020 with brief periods of unavailability for maintenance. In mid-April 2020 routine operations were suspended due to university and state response to Covid-19. Periodic routine reactor operations resumed mid-Aug 2020 and ran through the end of CY2020 with brief periods of unavailability for maintenance.

Unscheduled Shutdowns:

There was one unscheduled shutdown during CY2020. On February 25, 2020, the reactor was automatica lly tripped due to loss of power to the Stack Dilution Fan. The trip occurred in Mode 1 at about 20 kW as power was being raised to 100 kW for full power operation. Two of the three fuses were found to be blown for the three phase motor for the Stack Dilution Fan, the fuses were replaced and the fan operation was tested and returned to service.

Major Maintenance:

A listing of all major maintenance is presented in Table I. The first date for each entry is the date when the Maintenance Log Page (MLP) was opened; in quite a few cases, this date may be one or more days after the original problem was noted. The second date indicates the day the MLP was closed which can also be one or more days after work completion.

CY2020 Annual Report Page 1 of 4 University of Florida Training Reactor June 21, 2021

Table I Major Maintenance Performe d MLP Date Date Closed Summary Number Opened 20-1 1/27/2020 2/11/2020 Safety Channel 2 Calibrate switch circuit was repaired to remove the small amount of drift and non-repeatability noticed when testing. The Safety Channel 2 Trip Test switch circuit was repaired to reduce the sensitivity in the circuit that made it difficult to test and determine the trip point visually.

20-2 3/2/2020 3/9/2020 . The Pit Alarm Control Panel indications and controls were relocated to the Auxiliary Alarm Panel and retested to make room for a future motor control cabinet.

20-3 4/27/2020 6/2/2020 Door lock and hinge replacem ent of an access control door due to wear and tear. The replacement also meets the updated university IT security standards.

20-4 6/26/2020 6/26/2020 Routine replacement of the PC Deminera lized Water system resin and filter.

20-5 6/26/2020 6/26/2020 Routine addition of makeup water to the PC Tank.

20-6 6/26/2020 6/26/2020 Replaced +24 V de battery bank for the Area Radiation Monitoring System.

20-7 7/30/2020 7/31/2020 Replaced the Primary System Rupture Disc that was inadvertently broken during the Daily Pre-operational Checkout and added makeup water to the PC tank.

20-8 8/10/2020 8/10/2020 Relocate communication line between facility and university PD due to construction on PD end and retested.

20-9 8/28/2020 9/8/2020 Replaced Rx Cell Low Level Storage Area cage.

20-10 9/8/2020 9/10/2020 Routine replacement of resin to the DI water system.

20-11 9/8/2020 9/24/2020 Replaced the diesel generator for Reactor bldg and Nuclear Science bldg.

20-12 10/30/2020 11/13/2020 Repaired multiple Rabbit System leaks that was made capsule insertion and retrieval difficult and inconsistent.

20-13 12/15/2020 2/12/2021 Replaced multiple bearings and a gear head for the S-3 Control Blade Drive which has a longer drop time than other control blade drives and a noticeable "squeak" coming from the drives middle section. The retest revealed a significant reduction in drop time.

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Changes. Tests. and Experimen ts Implemen ted under 10 CPR 50.59:

A listing of changes, tests, and experiments implemented under 10 CFR 50.59 is presented in Table II.

All changes, tests, and experiments implemented during CY2020 screened-out from full evaluation.

Table II Changes, Tests, And Experiments Implemented Under 10 CFR 50.59 Number Date Summary Approved 20-1 2/11/2020 Procedure Change - SOP-0.5, Quality Assurance Program, was revised to incorporate editorial changes consistent with revision of surveillances Q-4, and Q-5 radiation surveys, and surveillance X-2 fuel inspection form.

20-2 2/11/2020 Procedure Change - SOP-0.5, Quality Assurance Program, was revised to incorporate changes to surveillance X-2 fuel inspection form to reflect changes made for the 2017 license renewal and the new Technical Specifications.

20-3 2/11/2020 Procedure Change - SOP-0.5, Quality Assurance Program, was revised to incorporate editorial changes needed for removing duplicate data sheets for the Q-4 and Q-5 radiation surveys that have been maintained in Radiation Control Technique

1. 31.

20-4 2/11/2020 Procedure Change - SOP-E.4, Calibration of Reactor Measuring Channels, was revised to incorporate changes made under MLP 20-1 for Safety Channel 2 calibrate assembly.

20-5 2/11/2020 Modification - Safety Channel 2 Calibrator modification to remove over sensitivity and drift in the circuit per MLP 20-1.

20-6 3/9/2020 Modification - Primary Equipment Pit Sump Alarm Indication Upgrade to relocate indication and control to the Auxiliary Alarm Panel (MLP 20-2).

20-7 7/29/2020 Experiment - creation of a comprehensive run request for "Routine Reactor Use for Research Purposes".

20-8 11/25/2020 Modification - Replacement of the Diesel Electric Generator located in the West Fenced Lot to supply emergency power to the Reactor Building and to the Nuclear Sciences Building (MLP 20-11 ).

Radioactive Effluents:

Liquid Waste No wastewater releases were made during CY2020.

Gaseous Waste The total activity of Argon-41 released during CY2020 was 17.50 curies. Using the calculation method described in the UFSAR, the maximum potential dose to a member of the public from UFTR Ar-41 emissions during CY2020 was 0.078 mrem/year. This is significantly less than 25% of the ALARA constraint of 10 mrem/yr.

CY2020 Annual Report Page 3 of 4 University of Florida Training Reactor June 21, 2021

Environmental Surveys:

In addition to periodic radiation surveys using hand-held instruments, environmental monitorin g is accomplished using radiation dosimeter badges. Areas monitored are located around the exterior of the Reactor Building (RB) and nearby buildings, including the Nuclear Sciences Building (NSB), the Rhines Hall (RH),

Weil Hall (WH), Weimer Hall (WmH), and Wertheim Engineering Lab (WEL). The environmental dosimeter reports are tabulated and presented in Table III. Dose equivalents below the minimum measurable quantity are reported as "M".

Table III Total Effective Dose Equivalent (TEDE) at Monitored Locations Quarterly TEDE Annual TEDE Area (mrem) (mrem)

Jan-Mar Apr-Jun Jul-Sep Oct-Dec

1. NSB Rm. 316 window - inside M 4 1 M 5

2. NSB, NW corner of Van de graff roof 7 10 6 7 30

3. UFTR West Lot, fence post 6 8 5 9 28

4. RH roof, SE roof corner near access M 6 3 3 12

5. RH roof, above N entrance to bldg 3 6 1 3 13

6. WH roof, SE corner of main roof M s 2 2 9

7. WH roof, near roof access door 2 4 3 3 12

8. WH roof, due N of bldg 25 4 7 6 6 23

9. WH roof, SE corner of SW roof section 1 6 1 3 11

10. WmH, 3 rd floor roof, SW corner M s 1 3 9

11. WmH Extension roof, SW comer 2 4 1 4 11

12. WmH Extension roof, NW corner 3 6 2 4 15

13. WEL roof, N side of Level 7 3 3 5 4 15

14. Control Badge - Building 683 west wall M M M M M Radiation Exposures:

There were no exposures received by facility personnel or visitors that were greater than 25% of that allowed in 10 CFR Part 20. Seven individuals received measurable occupational exposures during CY20

20. The maximum Total Effective Dose Equivalent (TEDE) received by any individual in CY2020 was 21 mrem for the year. The maximum extremity dose (SDE, ME) received by any individual in CY2020 was 217 mrem for the year.

CY2020 Annual Report Page 4 of 4 University of Florida Training Reactor June 21, 2021