ML20150A607
| ML20150A607 | |
| Person / Time | |
|---|---|
| Site: | University of Missouri-Rolla |
| Issue date: | 05/29/2020 |
| From: | Missouri Univ of Science & Technology |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20150A605 | List: |
| References | |
| Download: ML20150A607 (33) | |
Text
ANNUAL PROGRESS REPORT FOR THE MISSOURI UNIVERSITY OF SCIENCE AND TECHNOLOGY REACTOR
PROGRESS REPORT FOR THE MISSOURI UNIVERSITY OF SCIENCE AND TECHNOLOGY NUCLEAR REACTOR FACILITY April 1, 2019 to March 31, 2020 Submitted to The United States Nuclear Regulatory Commission And Missouri University of Science and Technology
i TABLE OF CONTENTS INTRODUCTION........................................................................................................................... 1 1.1 Background Information ............................................................................................................... 1 1.2 General Facility Status .................................................................................................................. 2 REACTOR STAFF AND PERSONNEL ...................................................................................... 5 2.1 Reactor Staff ................................................................................................................................. 5 2.2 Licensed Operators ....................................................................................................................... 5 2.3 Radiation Safety Committee ......................................................................................................... 6 2.4 Health Physics ............................................................................................................................... 7 REACTOR OPERATIONS ........................................................................................................... 9 EDUCATIONAL UTILIZATION............................................................................................... 16 REACTOR HEALTH PHYSICS ACTIVITIES ........................................................................ 21 PLANS ........................................................................................................................................... 25 6.1 Staffing and Financial Considerations ........................................................................................ 25 6.2 Reactor Documentation............................................................................................................... 25 6.3 Replacing Control Room Equipment .......................................................................................... 26 6.4 Reactor Operator Training .......................................................................................................... 26 LIST OF TABLES Table 1-1 List of MSTR SOP Revised......................................................................................................... 4 Table 2-1 MSTR Staff ................................................................................................................................. 5 Table 2-2 MSTR Operators ......................................................................................................................... 5 Table 2-3 Radiation Safety Committee Members ........................................................................................ 6 Table 2-4 Health Physics and EHS Staff ..................................................................................................... 7 Table 3-1 MSTR Core 128 Technical Data ................................................................................................. 9 Table 3-2 Reactor Utilization..................................................................................................................... 10 Table 3-3 Experimental Facility Usage ..................................................................................................... 10 Table 3-4 Unplanned Shutdowns (Rundowns) .......................................................................................... 11 Table 3-5 Maintenance .............................................................................................................................. 11 Table 4-1 S&T Classes at MSTR............................................................................................................... 16 Table 4-2 Reactor Sharing Program and Tours ......................................................................................... 17 LIST OF FIGURES Figure 3-1 MSTR Core 128 Configuration .................................................................................................. 9
iii ACKNOWLEDGEMENTS I would like to recognize current members of the Missouri S&T Reactor staff who contributed heavily to the development of this document. Ms. Alice Skye, Mr. Riley Cavin, and Mr. Ethan Mullane contributed in the areas of data collection, document generation, and document review. They have my sincerest thanks.
Ethan Taber Reactor Manager, MSTR
v
SUMMARY
During the 2019-2020 reporting period, the Missouri University of Science and Technology Reactor (MSTR) was in use for 2155 hours0.0249 days <br />0.599 hours <br />0.00356 weeks <br />8.199775e-4 months <br />. A significant portion of this time
(~40%) was used for class instruction, research, and training purposes. Operations were significantly hindered by a licensed staff shortage.
The MSTR operated safely and efficiently over the past year. No significant safety-related incidents or personnel exposures occurred.
The reactor facility supported several Missouri University of Science and Technology (S&T) courses and operator training over the year for a total of 552 student-hours. The reactor was visited by 566 visitors during the past year. There were 223 of these visitors that participated in labs at the reactor.
The reactor produced 6,473.77 kilowatt-hours of thermal energy using approximately 0.334 grams of uranium. A total of 16 samples were neutron irradiated in the reactor with the majority being analyzed in the reactor counting laboratory.
1 INTRODUCTION This progress report covers activities at the Missouri University of Science and Technology Reactor (MSTR) Facility for the period April 1, 2019 to March 31, 2020.
The reactor operates as a Missouri University of Science and Technology (S&T) facility.
It is available to the faculty and students from various departments of the University for their educational and research programs. Several other college and pre-college institutions also make use of the facility. The reactor is also available for the training of personnel from commercial concerns with legitimate interest in our facility use.
1.1 Background Information The MSTR attained initial criticality on December 9, 1961 and was the first operating nuclear reactor in the State of Missouri. The Bulk Shielding Reactor at Oak Ridge National Laboratory is the basis for the reactors design, as the MSTR is a light water, open pool reactor cooled by natural convective flow. The initial licensed power was 10 kW, which was up-rated to 200 kW in 1966. The MSTR utilizes Materials Testing Reactor (MTR) plate-type fuel and was converted from an original high-enriched uranium to low-enriched uranium fuel loading during the summer of 1992. The MSTR license was renewed for another 20 years in March of 2009.
The facility is equipped with several experimental facilities including a beam port, thermal column, three pneumatic transfer (rabbit) systems, and several manual sample irradiation containers and systems. The facility also contains a counting laboratory that has gamma spectroscopy capabilities. The gamma spectroscopy systems include germanium and sodium-iodide detectors, associated electronics, and state-of-the-art data acquisition and spectrum analysis equipment. Additionally, there is a liquid scintillation counter, thermoluminescent dosimeter reader, and x-ray and neutron imaging equipment for student and faculty use.
2 1.2 General Facility Status The MSTR operated safely and efficiently over the past year. No significant safety-related incidents or personnel exposures occurred. Operations were significantly reduced compared to previous years due to licensed staff shortages, with no full-time licensed operators on staff from June 14 to December 18, 2019. Operations were further suppressed by COVID-19 starting in early March 2020. Usage figures (excluding tours) presented herein reflect the three effective months (January 2020-March 2020) of operation.
No major upgrades or changes to the facility were performed over the past year.
However, several long-standing maintenance items including degraded components on the Radiation Area Monitoring (RAM) system were resolved.
The updated MSTR Emergency Plan from 2017 remains in effect. Training under this plan was predominantly completed in December 2019. A joint, full-scale drill for an injured/contaminated student was coordinated and conducted by Rolla City Fire and Rescue, Phelps Health and Ambulance Service, the local Federal Bureau of Investigation field office, S&T Police, S&T Environmental Health and Safety, S&T Finance and Operations, S&T Marketing and Communications, and MSTR staff on June 18, 2019. The drill included a pre-exercise meeting and a post-exercise review. The drill and lessons learned were discussed in depth at the following Radiation Safety Committee meeting.
On June 3-5, 2019, the Nuclear Regulatory Commission (NRC) conducted a routine, announced inspection of the MSTR. The inspection included review of the following areas:
organization and staffing; procedures; health physics; design changes; committees, audits, and review; and transportation of radioactive material since the last NRC inspection (of those areas).
The MSTR was found to be compliant with current NRC requirements and MSTR Technical
3 Specifications. However, an Inspector Follow-up Item (IFI) was generated regarding the non-use of the Environmental Protection Agencys COMPLY code in calculating offsite releases to determine compliance. It is noted that per D. Freemans memorandum dated 5/25/1995, the MSTR would remain below the reporting requirements (and therefore not require the use of COMPLY or CAP-88) so long as the facility released less than 16.85 Ci of Ar-41 per year. As compliance is demonstrated by the MSTR release, the use of COMPLY is not required. The inspector also specifically noted the Staffing was at a minimum level, in response to the personnel turnover and lack of replacement.
Independent auditors from the University of Missouri Research Reactor (MURR) audited the reactor facility on December 4, 2019. The auditors recommended improving the methods used to document staff on duty (such as how/when the Senior Reactor Operator on Duty signs into the permanent log book), especially from the standpoint of consistency. The auditors also noted that older versions of forms (i.e. forms from an SOP revision prior to current) appeared to be in use and recommended replacing the blank stock with the most recent revision. Other minor areas were also identified as suggested opportunities for improvement. MSTR and MURR audit each other on an annual basis, which has been a very beneficial arrangement for both facilities.
In November 2019, the reactor manager under underwent Senior Reactor Operator licensing examination under the NRC. In February 2020, four students underwent licensing in the following categories, with one SRO-Instant, one RO retake, and two initial RO candidates.
The reactor manager passed his exam and was licensed as of late December 2019. The status of the remaining exams has not been reported to the MSTR as of the writing of this report.
4 The reactor staff have continued to review the operation of the reactor facility in an effort to improve the safety and efficiency of its operation and to provide conditions conducive to its utilization by students and faculty.
Substantial efforts have continued to be invested in revising MSTR documentation, such as the SOPs, SAR, and other materials. Table 1-1 lists SOPs revised during the reporting period.
Table 1-1 List of MSTR SOP Revised SOP Title Date Notes 501 Emergency Procedures for Reactor Building Evacuation 09/20/2019 Page revision 501 Emergency Procedures for Reactor Building Evacuation 10/02/2019 Minor editorial
5 REACTOR STAFF AND PERSONNEL 2.1 Reactor Staff Table 2-1 MSTR Staff Name Title Dr. Joseph Graham Reactor Director Mr. Ethan Taber Reactor Manager Mr. Craig Reisner Senior Reactor Operator (Part-Time)1 Mr. Anthony Alchin Electronic Technician II2 Ms. Alice Skye Student Assistant (Part-Time)
Mr. Riley Cavin Student Assistant (Part-Time)
Mr. Ethan Mullane Student Assistant (Part-Time) 2.2 Licensed Operators Table 2-2 MSTR Operators Name License Type Ethan Taber Senior Reactor Operator3 Craig Reisner Senior Reactor Operator Anthony Alchin Senior Reactor Operator4 Laura Pirrone Senior Reactor Operator4 Keith Kellett Reactor Operator4 Isaac Mulhern Reactor Operator4 1
Effective Date: June 25, 2019 2
Termination Date: June 14, 2019 3
Effective Date: December 18, 2019 4
Termination Date: June 20, 2018
6 2.3 Radiation Safety Committee The Missouri S&T Radiation Safety Committee performs on-campus oversight of the MSTR operations and meets quarterly. The committee met on 6/20/2019, 9/19/2019, 12/13/2019, and 3/3/2020 during the reporting period. The committee members are listed in Table 2-3.
Table 2-3 Radiation Safety Committee Members Name Department Dr. Mark Fitch Civil, Architectural, and Environmental Engineering Ms. Michelle Bresnahan Environment Health and Safety Dr. David Wronkiewicz Geosciences and Geological Engineering Dr. Shoaib Usman Mining and Nuclear Engineering Dr. Fadha Al Falahi Environmental Health and Safety Dr. Yue-Wern Huang Biological Sciences Dr. Carlos Castano Mining and Nuclear Engineering Dr. Amitava Choudhury Chemistry Mr. Tony Hunt Environmental Health and Safety Dr. Muthanna Al-Dahhan Chemical and Biological Engineering Dr. Joseph Graham Mining and Nuclear Engineering Mr. Ethan Taber Missouri S&T Reactor Mr. Anas Massri5 Fiscal Services Ms. Lisa Cerney5 Fiscal Services 5
Ms. Cerney replaced Mr. Massri on the committee effective February 12, 2020.
7 2.4 Health Physics The Environmental Health and Safety (EHS) Department provides the health physics support for the Missouri S&T Reactor. The EHS Department is organizationally independent of the Reactor Facility operations group. Health Physics personnel are listed in Table 2-4.
Table 2-4 Health Physics and EHS Staff Name Title Ms. Michelle Bresnahan Director of EHS, Radiation Safety Officer Mr. Tony Hunt Assistant Director of EHS Dr. Fadha Al Falahi Health Physicist, Laser Safety Officer Mr. Reagan Dugan Health Physics Technician (Part-time)
Ms. Jenna Slocum Health Physics Technician (Part-time)
Mr. Brandon Ochterbeck Health Physics Technician (Part-time)
Mr. Bradley Faison Health Physics Technician (Part-time)
Mr. Friedrich May Health Physics Technician (Part-time)
9 REACTOR OPERATIONS Core designation 128W is presently in use. The W mode core is completely water reflected and used for normal operations and beam port operations. The T mode (core positioned near graphite thermal column) may be used for various experiments and thermal column usage.
Table 3-1 presents pertinent core data for core designation 128, while Figure 3-1 shows the core configuration. The excess reactivity, shutdown margin, and rod worths were previously measured in February 2018. The measurements were taken in both T and W mode with reference core conditions.
Table 3-1 MSTR Core 128 Technical Data Rod Worth (%k/k) Shutdown Excess Core Mode Margin Reactivity Rod #1 Rod #2 Rod #3 Reg. Rod
(%k/k) (%k/k)
W 2.6066 2.2023 2.1376 0.5159 3.7455 0.5944 128 T 2.6416 2.1444 2.1374 0.5630 3.6296 0.6522 Key to Prefixes for Core Configuration F Full Element C Control Element HF Half Front Element HR Half Rear Element IF Irradiation Fuel Element BRT Bare Rabbit CRT Cadmium Rabbit HC Hot Cell Rabbit S Source A S B HR2 F2 C F4 C4 F17 C1 F5 D F16 F13 F11 F14 F18 E F8 C5 F15 C2 F9 F CRT HF1 HC HF2 BRT 1 2 3 4 5 6 7 8 9 Figure 3-1 MSTR Core 128 Configuration
10 Table 3-2 shows reactor utilization, while Table 3-3 shows facility use other than the reactor.
Table 3-2 Reactor Utilization Reactor use 119.9 hr.
Time at power 76.8 hr.
Energy generated 6473.8 kW-hr.
Total number of samples, neutron irradiated 16 U-235 burned 0.283 g U-235 burned and converted 0.334 g Table 3-3 Experimental Facility Usage Facility Hours Bare Rabbit Tube 2.7 Cadmium Rabbit Tube 0.0 Beam Port 0.0 Thermal Column 0.0 Other Core Positions 0.5 Hot Cell 0.0 Gamma Exposures 0.0 Total 3.3 Only a single unscheduled shutdown (scrams, rundowns, and unplanned normal shutdowns) occurred during the reporting period, which is documented in Table 3-4.
Maintenance activities are listed in Table 3-5. Note that all date and time entries in these tables utilize the ISO 8601 standard.
11 Table 3-4 Unplanned Shutdowns (Rundowns)
SRO on Duty Date/Time Type Cause Corrective Action Permission to Restart 2019-11-12T12:03-06:00 120% Demand Trainee upscaled incorrectly SRO instructed Trainee to be aware of Yes which buttons to push while operating Table 3-5 Maintenance Date/Time Issue or Basis Action or Corrective Action 2019-05-28T10:00-05:00 Channel calibration Annual checklist started (Log&Linear, Linear, Safety Channels Complete)
Power to building shut off due to substation replacement. Battery backup found to 2019-05-30T06:00-05:00 Electrical service be insufficient. New batteries ordered.
10:00-05:00 Annual checklist startup channel started.
11:10-05:00 Startup calibration complete.
2019-05-31 Channel calibration 14:30-05:00 Rod indicator calibration started.
15:31-05:00 Rod indicator calibration complete.
10:25-05:00 RAM calibrations started 13:51-05:00 Lower Level basement RAM enters continuous discharge above 20 2019-06-06 Channel calibration mrem/hr. Alarm setpoints still usable within working range. Queries to find spare parts to fix RAM have been sent out. Otherwise HRA for LL Basement still within TS requirements. All other RAMs completed satisfactorily.
12 Table 3-5 (Cont.)
Date/Time Issue or Basis Action or Corrective Action 2019-06-28T13:00-05:00 Fission chamber (startup channel) is reading offscale on "Operate" setting. Preamplifier and detector-side cable removed for testing and troubleshooting.
2019-07-03T11:03-05:00 Startup channel preamplifier and cabling reinstalled.
Reactor will not be taken critical until startup channel is calibrated.
2019-07-11T14:21-05:00 Startup channel fission chamber removed and connections were checked. Additional maintenance and calibration was in progress and was completed. The channel appropriately responds to fission chamber and source movement. The discriminator circuit (R26) may need to be adjusted prior to the next startup due to the extremely clean core.
2019-07-22T09:00-05:00 Startup channel connections and preamplifier checked Ongoing Startup channel offscale/inoperable due to no reading. The intermediate connector was insulated, which appeared to fix the issue.
2019-09-04T16:30-05:00 Due to excessive noise on the startup channel, channel preamplifier was removed for testing.
2019-09-10T10:15-05:00 Fission chamber removed.
2019-09-14T16:00-05:00 Fission chamber was reinstalled with the preamplifier and a new detector-preamp signal cable.
2019-10-23T11:57-05:00 Fission chamber was removed at 10:00-05:00. Fission chamber was reinstalled at 11:57, with connections independently verified.
2020-01-08T14:45-06:00 Startup channel preamplifier removed to troubleshoot noise issues.
13 Table 3-5 (Cont.)
Date/Time Issue or Basis Action or Corrective Action 2020-01-13T14:45-06:00 Startup channel fission chamber removed. Corrosion noted on terminal at FC.
2020-01-21T12:54-06:00 Startup channel fission chamber and preamplifier reinstalled. Connections independently verified. Channel tested (and determined to be operable) by inserting and removing (using motor) fission chamber and observing response.
Ongoing Startup channel offscale/inoperable 2020-02-26T10:40-06:00 Significant noise observed on startup channel. HV was power cycled, signal cables were adjusted, and discriminator (R26) was reset to 10 cps. Channel determined to be operable by observing response to FC insertion and removal.
2020-03-17T14:53-05:00 Startup channel preamplifier connections were removed, checked, and reattached for troubleshooting noise issues. Connections were verified independently.
2019-08-05T16:26-05:00 Thermocouple 2 removed from the core.
2019-10-17T14:10-05:00 Thermocouples 1 and 3 removed from the core for Ongoing Channel calibration calibration.
2019-10-18T12:20-05:00 Thermocouples 1, 2, and 3 were installed following calibration.
Rods 1, 2, and 3 were individually removed, inspected, and reinserted. Rod drives 2019-08-12 Rod visual inspection and magnet assemblies were reinstalled. All items were completed by 2019-08-14T14:10-05:00.
2019-10-23T13:35-05:00 Channel calibration Annual checklist completed
14 Table 3-5 (Cont.)
Date/Time Issue or Basis Action or Corrective Action Magnet #1 current observed to drop and fluctuate. Current reset to 42 mA, but 2020-01-08T12:21-06:00 Magnet current drop determined to be operable.
2020-01-08T14:45-06:00 Rod drop time test Rod drop time test completed RAM battery replaced. Console clock reset. RAMs tested and determined to be 2020-01-23T12:45-06:00 RAM battery operable.
2020-01-28T08:51-06:00 Linear power supply HV and CV connection removed, checked, and reconnected. Connections independently verified. Determined to be operable by source spike during prestartup.
2020-02-03T10:30-06:00 Linear PS HV cable inspected and reconnected.
Connections independently verified. Channel determined to be operable.
2020-02-06T08:40-06:00 Linear power supply HV connection removed, Ongoing Linear channel noise inspected, and reinstalled. Connections were independently verified.
Operability will be determined as part of Prestartup Checklist.
2020-03-17T14:53-05:00 Linear PS connections were removed, checked, and reattached for troubleshooting noise issues. Connections were verified independently 2020-03-18T13:07-05:00 Linear PS HV cable connector resoldered and reattached. Connections were verified independently.
Pulley belts and filters/outlets inspected on vent fans 1, 2, and 3. Pulleys replaced 2020-02-03T09:30-06:00 Vent fan preventative maintenance as necessary. Vent fans were tested and determined to be operable at 10:12-06:00.
15 Table 3-5 (Cont.)
Date/Time Issue or Basis Action or Corrective Action Conductivity meter (demin) declared inoperable due to hardware reset. Prior to 2020-03-09T09:15-05:00 Conductivity meter inoperable reset, cell #1 0.527, cell #2 0.764. Restored to operation by 11:30-05:00.
2020-03-18T13:07-05:00 RMS Unit #4 replaced with spare.
Ongoing RMS Degradation 2020-04-02T15:34-05:00 Troubleshooting performed on RAM #4. Alternate remains in place.
Fire alarm system component Beam smoke detector declared inoperable. Remote surveillance fire watch enacted 2020-03-22T23:30-05:00 inoperable as CM. Detector restored to operable status by 2020-03-23T10:03-05:00
16 EDUCATIONAL UTILIZATION The reactor facility supported 12 Nuclear Engineering courses in the past year for approximately 140 students and 350 student-hours. The reactor supported one graduate student for a total of 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> and Reactor Operator Training for 6-10 students for 202 hours0.00234 days <br />0.0561 hours <br />3.339947e-4 weeks <br />7.6861e-5 months <br />. The MSTR was able to have three students from the S&T work study program assist in facility operations.
Approximately 160 hours0.00185 days <br />0.0444 hours <br />2.645503e-4 weeks <br />6.088e-5 months <br /> of supporting operations (including experiment preparation and spectroscopy) were involved for these educational (non-training) uses.
Table 4-1 lists Missouri S&T classes taught at the facility along with associated reactor usage for this reporting period.
Table 4-1 S&T Classes at MSTR Time at
- of Student Semester Class Number/Title Reactor Students Hours (hrs.)
SP 2019 NE 1105: Nuclear Technology Applications 10 - -
SP 2019 NE 2406: Reactor Operations I 11 0.9 10.2 SP 2020 NE 4456: Reactor Operations II 1 5.0 5.0 NE 4312: Nuclear Radiation Measurements SP 2019 35 1.2 41.9 and Spectroscopy SP 2019 NE 4438: Reactor Laboratory II 31 0.4 11.2 FS 2019 NE 1105: Nuclear Technology Applications 17 0.8 13.6 FS 2019 NE 4428: Reactor Laboratory I 28 2.4 66.0 SP 2020 NE 1105: Nuclear Technology Applications 6 1.9 11.3 SP 2020 NE 2406: Reactor Operations I 20 7.5 149.5 SP 2020 NE 4456: Reactor Operations II 2 0.5 1.1 NE 4312: Nuclear Radiation Measurements SP 2020 30 0.7 20.5 and Spectroscopy SP 2020 NE 4438: Reactor Laboratory II 27 0.5 13.6
17 The Reactor Sharing Program was a U.S. Department of Energy (DOE) project intended to establish awareness and share education about the nuclear field beyond the campus. The MSTR established a corresponding program in 1990 and, while no longer DOE funded, is still active at the MSTR. As a related component, future nuclear engineering students are also brought to the facility for departmental tours.
During the reporting period, 566 students, instructors and public guests visited the MSTR facility for total of 585 hours0.00677 days <br />0.163 hours <br />9.672619e-4 weeks <br />2.225925e-4 months <br />. Of these individuals, 223 participated in some kind of lab in the facility. Table 4-2 lists those schools and groups that were involved in this years program that are not part of S&T Nuclear Engineering Department. The majority of participants were high school students. The Reactor Sharing Program serves as a strong campus-wide recruiting tool by attracting high school students to the university and generating interest in nuclear engineering, science, and technology.
Table 4-2 Reactor Sharing Program and Tours Time at
- of Visitor-Date Event/Group Reactor Visitors Hours (hrs.)
04/05/2019 Development Board 3 0.43 1.3 04/05/2019 Society of Women Engineers (SWE) 44 0.50 22.0 04/18/2019 Tour 2 0.82 1.6 04/19/2019 Tour 2 0.15 0.3 04/22/2019 Tour 6 1.05 6.3 04/26/2019 Dr. Gelless Energy Economics Class 6 0.65 3.9 04/27/2020 Boy Scouts (Merit Badge Univ.) 15 0.53 8.0 04/30/2019 Tour 2 1.17 2.3 05/03/2019 Khalifa University 1 0.58 0.6 05/03/2019 Tour 1 1.03 1.0 05/19/2019 Tour 4 0.30 1.2 05/19/2019 Tour 15 0.77 11.5
18 Table 4-2 (Cont.)
Time at
- of Visitor-Date Event/Group Reactor Visitors Hours (hrs.)
05/22/2020 Alumni Tour 3 0.43 1.3 05/31/2019 Tour 7 1.05 7.4 06/03/2019 NE Camp 18 0.83 15.0 06/03/2019 NE Camp 18 0.85 15.3 06/11/2019 Jackling Camp 14 1.58 22.2 06/13/2019 Jackling Camp 11 1.65 18.2 06/13/2019 Jackling Camp 3 0.23 0.7 06/13/2019 Jackling Camp 14 1.22 17.0 06/18/2019 Emergency Drill Volunteer 2 2.22 4.4 06/20/2019 Tour 1 0.63 0.6 06/25/2019 Jackling Camp 8 1.50 12.0 06/27/2019 Jackling Camp 17 1.17 19.8 06/27/2019 Jackling Camp 12 1.67 20.0 06/28/2019 Tour 4 0.68 2.7 07/05/2019 Discovery Day 4 0.83 3.3 07/08/2019 Mining and Nuclear 2 0.13 0.3 07/08/2019 Tour 6 1.00 6.0 07/09/2019 Jackling Camp 16 1.65 26.4 07/11/2019 Jackling Camp 14 1.57 21.9 07/11/2019 Jackling Camp 16 1.28 20.5 07/12/2019 Discovery Day 4 1.05 4.2 07/19/2019 Fort Leonard Wood CBRN 18 1.60 28.8 07/19/2019 Discovery Day 3 0.90 2.7 07/19/2019 Discovery Day 3 0.33 1.0 07/24/2019 Ghanaian Ambassador to US 7 0.57 4.0 07/25/2019 Materials Camp 14 0.82 11.4
19 Table 4-2 (Cont.)
Time at
- of Visitor-Date Event/Group Reactor Visitors Hours (hrs.)
07/25/2019 Materials Camp 17 0.82 13.9 07/25/2019 Materials Camp 13 0.93 12.1 07/26/2019 Discovery Day 5 0.97 4.8 08/02/2019 Tour 1 0.55 0.6 08/02/2019 Discovery Day 4 1.03 4.1 09/16/2019 Tour 4 0.32 1.3 10/10/2019 ERDC-CERL 2 0.58 1.2 10/14/2019 Tour 2 0.13 0.3 10/15/2019 Blue Glow Tour 33 2.25 74.3 10/19/2019 SWE 35 1.73 60.7 10/21/2019 Tour 2 0.23 0.5 10/28/2019 Job Shadow 1 7.42 7.4 11/01/2019 NASA MSFC 1 0.45 0.5 11/07/2019 Tour 2 0.78 1.6 11/13/2019 Al Qadisyah University 7 0.32 2.2 12/04/2019 Tour 2 1.05 2.1 12/11/2019 Curtiss-Wright 2 0.38 0.8 12/14/2019 Tour 3 0.37 1.1 12/16/2019 Discovery Day 3 0.93 2.8 01/02/2020 Tour 2 0.37 0.7 01/24/2020 Tour 3 0.70 2.1 02/06/2020 Missouri State Highway Patrol 7 0.45 3.2 02/08/2020 Boy Scouts (Merit Badge Univ.) 13 0.75 9.8 02/08/2020 Boy Scouts (Merit Badge Univ.) 16 0.52 8.3 02/08/2020 Boy Scouts (Merit Badge Univ.) 15 0.47 7.0 02/17/2020 Open House 25 0.48 12.1
20 Table 4-2 (Cont.)
Time at
- of Visitor-Date Event/Group Reactor Visitors Hours (hrs.)
02/17/2020 Open House 2 0.23 0.5 02/18/2020 Tour 2 0.38 0.8 02/21/2020 Tour 2 0.68 1.4
21 REACTOR HEALTH PHYSICS ACTIVITIES The health physics activities at the Missouri S&T Reactor facility consist primarily of radiation and contamination surveys, monitoring of personnel exposures, airborne activity, pool water activity, and waste disposal. Releases of all by-product material to authorized, licensed recipients are surveyed and recorded. In addition, health physics activities include calibrations of portable and stationary radiation detection instruments, personnel training, special surveys and monitoring of non-routine procedures.
5.1 Routine Surveys Monthly radiation exposure surveys of the facility consist of direct gamma and neutron measurements. No unusual exposure rates were identified. Monthly surface contamination surveys consist of 20 to 40 swipes counted separately for alpha and beta/gamma activity. No significant contamination outside of contained work areas were found.
5.2 By-Product Material Release Surveys There were no shipments of by-product material released off-campus under the MSTR license (R-79). A total of 0.1 µCi of by-product materials were transferred on-campus to S&Ts materials license in accordance with SOP 603, Release of By-Product Materials on Campus, and the Missouri S&Ts Handbook of Radiological Operations.
5.3 Routine Monitoring Approximately 20 reactor facility personnel and students involved with the operations or regular experiments in the reactor facility are assigned Mirion Technologies Genesis Ultra Thermoluminescent Dosimeters (TLDs). The quantity of issued TLDs varies throughout the year due to class enrollment and personnel turnover, with reactor staff and operator trainees issued TLDs as soon as practical after their start. The full-time Reactor Staff have beta, gamma, and neutron whole-body TLDs along with individual TLD rings and five area dosimeters. This staff
22 dosimetry set is read twice monthly. There have been no significant personnel exposures during this reporting period.
There are three environmental TLDs outside the reactor building which are read quarterly. There are also five other beta, gamma, neutron dosimeters used by the health physics personnel and four other area beta, gamma neutron dosimeters that are read monthly. All remaining dosimeters are also read monthly. In addition, 10 digital, direct-reading dosimeters are used for non-TLD-issued students and visitors. These digital dosimeters are also used for high radiation work along with audible dosimeters. No students or visitors received any reportable or significant exposure.
Airborne activity in the reactor bay is monitored by a fixed filter, particulate continuous air monitor (CAM). Low levels of Argon-41 are routinely produced during operations.
Pool water activity is monitored monthly to ensure that no gross pool contamination or fuel cladding rupture has occurred. Gross counts and spectra of long-lived gamma activity are compared to previous monthly counts. From April 2018 through March 2019 sample concentrations averaged 1.1x10-5 µCi/mL.
Release of gaseous Ar-41 activity through the building exhausts is determined by relating the operating times of the exhaust fans and reactor power during fan operation to previously measured air activity at maximum reactor power. During, this period, an estimated 80,630 µCi of Ar-41 was released into the air. It is noted that a bounding analysis performed in 1994 using COMPLY indicated that the MSTR is exempt from reporting this release to the Environmental Protection Agency so long as the annual release remains below 16.85 Ci and reactor power is limited to 200 kW.
23 5.4 Waste Disposal Solid waste, including water filters, used resins, and contaminated paper/gloves is stored and/or transferred to the campus waste storage area for later shipment to a commercial burial site. No waste was transported offsite during the reporting period.
Water is analyzed for radioactive contamination, and approval is required before the water is released. One release was made from the subcritical assembly (359.2 gal), with no detectable activity.
5.5 Instrument Calibrations Portable survey instruments and meters are calibrated annually. Thirteen meters were calibrated on 9/20/2019, with the next calibration due in September 2020. Eight meters were calibrated on 3/14/2020, with the next calibration due in March 2021. Portable ion chambers were calibrated by an offsite vendor (Ludlum Instruments) on a rotating schedule of 6/28/2019, 8/16/2019, and 2/6/2020.
The digital dosimeters are calibrated by an offsite vendor. Half of the digital dosimeters were calibrated on 8/20/2019, with the remaining half calibrated on 3/5/2019 (vendor had not completed the current calibration by the end of the reporting period).
The radiation area monitors were calibrated on 6/6/2019 with the next calibration due June 2020.
25 PLANS The reactor staff will continue to be involved in four major undertakings during the next reporting period: 1) mitigating staffing losses and financial considerations, 2) updating the reactor documentation, specifically the SAR and SOPs, 3) replacing control room equipment, and 4) continuation of the reactor operator training program.
6.1 Staffing and Financial Considerations The MSTR was observed to be at low staffing levels during the most recent NRC inspection, and personnel loss has continued. To correct the severe staffing shortage at the MSTR, a broad-responsibility position of Reactor Engineer has been reinstated, with the initial hiring approval process underway. Student reactor operators and work studies will also be utilized where prudent to try and overcome the staffing shortage.
Final COVID-19 financial impacts were unknown as of the end of the reporting period.
However, the facility may need to consider additional budget cuts with a corresponding reduction in facility capabilities.
6.2 Reactor Documentation Updates to the SAR continue to be works in progress. Several changes have not been corrected or fully documented in the SAR in previous years, with instrumentation and auxiliary cooling being the primary areas of concern. The SAR updates are also intended to support future license renewal efforts (or NPUF SAR update requirements if the Commission approves the NPUF licensing rule).
The SOPs continue to be updated with the new university name in addition to minor changes and corrections. Any remaining non-digitalized checklists are also intended to be reformatted into fillable PDF files with electronic signatures. Maintenance, training, and administrative procedures are being heavily expanded upon.
26 6.3 Replacing Control Room Equipment Efforts to modernize the control room instrumentation are ongoing. Digital recorders have been procured to replace the existing Nuclear Instrumentation (NI) strip chart recorders.
Each modification package is being performed under 10 CFR 50.59 and requires RSC review and approval.
NI channels are also being considered for replacement. Replacement channels with mostly unused/not-installed 1990s systems (replacement startup and linear channels) are available in the facility in various states of testing and disrepair. The facility may consider pursing new digital NI channels in the future as a longer term solution.
6.4 Reactor Operator Training The MSTR had one staff member obtain their Senior Reactor Operator license. An additional four students underwent licensing in February 2020, with the results pending.
The reactor staff is limiting operator training to approximately ten students with a very strong desire to obtain the license and assist reactor staff with reactor operations. The new training program has proven to be effective in keeping the students that want the license and work with reactor staff. At the end of the reporting period, six students were training to undergo operator licensing in Spring 2021. The Reactor Director, an additional faculty member, and the Radiation Safety Officer are all also preparing for Reactor Operator or Senior Reactor Operator examinations in Spring 2021.