ML21267A398
| ML21267A398 | |
| Person / Time | |
|---|---|
| Site: | Ohio State University |
| Issue date: | 09/13/2021 |
| From: | Cao L Ohio State University |
| To: | Xiaosong Yin Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| Download: ML21267A398 (11) | |
Text
tJJ THE OHIO STATE UNIVERSITY . College of Engineering Nuclear Reactor Laboratory 1298 Kinnear Rd Columbus, OH 43212 reactor@osu.edu reactor.osu.edu September 13, 2021 U.S. Nuclear Regulatory Commission Document Control Desk Attn: Xiaosong Yin One White Flint North 11555 Rockville Pike Rockville, MD 20852-2738
Subject:
Annual Report for The Ohio State University Research Reactor, License R-75, Docket 50-150 Please find enclosed the annual report for The Ohio State University Research Reactor, Docket No. 50-150. This report is being submitted as required by our Technical Specifications, Section 6.6.1. If you have questions on the content of this report, please contact Mr. Andrew Kauffman, Senior Associate Director of the Nuclear Reactor Laboratory, at 614-688-8220 or kauffman.9@osu.edu.
I declare under penalty of perjury that the foregoing is true and correct.
Executed on 13-Sep-2021.
Sincerely,
~~
Lei Raymond Cao, Director OSU Nuclear Reactor Lab The Ohio State University (License R-75, Docket 50-150)
THE OHIO STATE UNIVERSITY RESEARCH REACTOR ANNUAL REPORT FOR FY 2020/2021 SEPTEMBER 2021 OSURR Annual Report Page 1 of 10 Sep 2021
Introduction As stated in The Ohio State University Research Reactor (OSURR) Technical Specifications Section 6.6.1, Operating Reports, an annual report shall be made to the NRC by September 30 of each year. This report is to include the following seven information items:
- 1. A narrative summary of operating experience (including experiments performed) and of changes in facility design, performance characteristics, and operating procedures related to reactor safety occurring during the reporting period
- 2. A tabulation showing the energy generated by the reactor (in kilowatt hours) and the number of hours the reactor was in use
- 3. The results of safety related maintenance and inspections and the reasons for corrective maintenance of safety-related items
- 4. A table of unscheduled shutdowns and inadvertent scrams, including their reasons and the corrective actions taken
- 5. A summary of the safety analyses performed in connection with changes to the facility or procedures, which affect reactor safety, and performance of tests or experiments carried out under the conditions of 10 CFR 50.59 *
- 6. A summary of the nature and amount of radioactive gaseous, liquids, and solid effluents released or discharged to the environs beyond the effective control of the licensee as measured or calculated at or prior to the point of such release or discharge
- 7. A summary of radiation exposures received by facility personnel and visitors, including the dates and times of significant exposures These seven information items are discussed below for the period July 1, 2020 through June 30, 2021, except as noted for exposure records.
- 1. Summary of Operating Experience and Changes 1.A. Experiments Performed The OSURR engages in a wide range of research, service, and education activities. Examples of recent types of research and industry service include: evaluation of material properties using neutron depth profiling, neutron transmission testing, and neutron activation analysis; evaluation of radiation response and damage for electronic components and other materials, such as optical fibers and optical fiber-based sensors; evaluation of neutron and gamma-ray radiation sensitive detector performance, including at high temperatures; and isotope production. The OSURR has been involved in the evaluation of a number of potential types of neutron and radiation detectors, including fiber-optic, solid-state, and scintillator-based, and it regularly tests fission chambers for use in commercial power reactors by characterizing their response to known neutron flux. Neutron transmission testing has been used to verify boron loading in borated aluminum, and neutron depth profiling has been used for battery-technology studies.
Isotope production has typically been performed for medical research, but sources have been created for other uses, including testing of radiation-sensitive detectors.
In addition, educational student laboratories and demos are performed at the OSURR, including reactivity worth measurements, spectrum and profile characterizations using flux-wire activation and analysis, radiation measurements using neutron and gamma-sensitive detectors, and reactor dynamics measurements. The OSURR provides these via educational tours and student laboratory sessions. The OSURR also supports faculty-led student research, which provides invaluable experience for the next generation of researchers.
OSURR Annual Report Page 2 of 10 Sep 2021
The following are typical laboratory topics taught at the OSURR:
- a. laboratory introduction, radiation safety training, radiological survey
- b. approach to critical (using banked control rods rather than fuel loading)
- c. control rod calibration by rod drop, positive period, and subcritical multiplication
- d. temperature coefficient measurement
- e. delayed neutron groups measurement
- f. core axial profile
- g. neutron spectrum measurement For tour groups, neutron activation of small aluminum samples with a half-life measurement is typically performed.
The reactor utilization for July 1, 2020 through June 30, 2021 is summarized in the following reports. Please note that the utilization hours listed below only reflect actual reactor operating time. The list does not include hours spent on tasks supporting this reactor utilization.
OSURR Annual Report Page 3 of 10 Sep 2021
The Ohio State University Nuclear Reactor Lab Reactor Utilization Report:
July 1 - December 31, 2020 User (Name) 1 Description Hours AFIT Radiation effects on materials 11.4 Battelle Boron tracers in materials 6.2 NDSU (Lepper) Neutron activation analysis of geology samples 1.6 NRL staff Facility characterization, reactor maintenance, etc. 46.4 Orrvilon, Inc. Neutron transmission testing 13.9 Reuter-Stokes, LLC Fission chamber testing 38.3 2
U of M (Jovanovic/ Morgan) NAA of optical fibers and windows 0.0 OSU NE (Blue/ Birri) Optical fiber-based gamma thermometer 10.4 OSU NE (Cao/ Fast beam facility characterization 8.8 Kandlakunta)
OSU NE (Cao/ Oksuz) Fast beam facility characterization 60.2 OSU NE (Khafizov) Radiation effects on SAW materials and sensors 43.0 OSU NE 4506 Class support 5.7 Total: 245.9 Notes:
- 1. Utilization hours reflect actual reactor operating time. This list does not include time spent on tasks supporting this reactor utilization (pre-start and post-shutdown checkout, experiment planning and setup, etc.).
- 2. The value listed does not include reactor utilization when run as a secondary user concurrent with a primary user.
OSURR Annual Report Page 4 of 10 Sep 2021
The Ohio State University Nuclear Reactor Lab Reactor Utilization Report:
January 1 - June 30, 2021 1
User (Name) Description Hours OSU NE (Blue/ Birri) Optical fiber-based gamma thermometer 4.4 OSU NE (Blue/ Birri) Radiation effects on optical fiber sensors 0.0 2 OSU NE (Blue I Mccary) Radiation effects on optical fibers 89.1 OSU NE (Blue/ McCary) Cladding sapphire fibers 14.9 OSU NE (Cao/ Oksuz) Fast beam facility characterization (imaging) 77.1 OSU NE (Khafizov) Radiation effects on SAW filters 19.4 OSU NE 6726 Lab class support 8.4 OSU ECE (Brillson) Radiation effects on Ga2O3 1.0 OSU College of Engineering Tour for Dean Howard 1.5 Air Force Institute of Technology Radiation effects on transistors 1.0 Battelle (Friedman) Boron tracers 6.3 2 Luna Innovations (Rountree) Radiation effects on fiber-based sensors 127.6 Oak Ridge National Lab (Ezell) Radiation effects on NTP sensors 11.6 U. of Alabama - Birmingham Radiation effects on Ga2O3 3.4 U. of Tennessee - Knoxville Radiation effects on materials (LilnSe) 2.3 Niowave, Inc. Production of Lu-177 2.2 Orrvilon, Inc. Neutron Transmission Testing 22.0 Reuter-Stokes, LLC Fission chamber testing 49.7 NRL staff Maintenance, training, facility characterization 14.1 Total: 456.0 Notes:
- 1. Utilization hours reflect actual reactor operating time. This list does not include time spent on tasks supporting this reactor utilization (pre-start and post-shutdown checkout, experiment planning and setup, etc.).
- 2. The value listed does not include reactor utilization when run as a secondary user concurrent with a primary user.
OSURR Annual Report Page 5 of 10 Sep 2021
1.8. Changes in Facility Design There were no facility design changes that required a change to the Technical Specifications.
10 CFR 50.59 changes are described in Section 5.A of this report.
1.C. Changes in Performance Characteristics There have been no changes in performance characteristics related to reactor safety in the last year.
1.D. Changes in Operating Procedures There were no changes in operating procedures related to reactor safety in the last year.
10 CFR 50.59 changes are described in Section 5. B of this report.
- 2. Energy Generated and Hours of Use Kilowatt-Hours of Operation: 167,061.2 kW-hr Hours of Utilization: 701.9 hr
- 3. Safety Related Maintenance None.
- 4. Unscheduled Shutdowns From July 1, 2020 to June 30, 2021, there was one unplanned shutdown that is summarized below.
Reason Corrective Action Operator error; wrong button pushed by trainee (1) None required
- 5. Changes in Facility and Procedures in Accordance with 10 CFR 50.59 5.A. Facility Modifications During the period July 1, 2020 to June 30, 2021, five OSURR Modification Requests were completed:
- 1) Effluent Monitor Ratemeter Replacement
- 2) BP2 Replacement External Shutter
- 3) Effluent Monitor Counter Module Replacement
- 5) BP1 Fast Beam Facility Creation All of the modifications screened out of 10 CFR 50.59 evaluation per Procedure AP-16, 50.59 Screening and Evaluation.
OSURR Annual Report Page 6 of 10 Sep 2021
5.B. Procedure changes The following is a list of procedure changes made under 10 CFR 50.59 from July 1, 2020 to June 30, 2021, in accordance with Administrative Procedure AP-06, Format for Writing, Revising, and Approving Procedures.
Procedure Procedure Revision Number Title Date IM-01 Scram Checks 06/17/21 IM-03 OSURR Pre-Start Checkout 02/16/21 IM-04 Post-Shutdown Checkout 02/18/21 IM-07 Rod Parameter Testing 06/23/21 IM-12 Reactor Instrumentation Calibration 06/01/21 IM-13 Operational Verifications 06/01/21 RS-08 Smear Surveys 04/16/21 RS-09 Area Radiation Survevs 04/08/21 RS-18 Environmental Monitoring 07/16/20 All of the procedure changes screened out of 10 CFR 50.59 evaluation per Procedure AP-16, 50.59 Screening and Evaluation.
- 6. Radioactive Effluents 6.A. Gaseous Effluent The only gaseous effluent releases made from operation of the OSURR are Ar-41 releases from activation of the naturally occurring noble gas Ar-40. For the period July 1 - December 31, 2020, Ar-41 releases measured 4.4% of the annual average concentration limit. From January 1 -
June 30, 2021, releases measured 7.3% of the annual average concentration limit. In accordance with the requirements of 10 CFR 20.1101 (d), the COMPLY code was run using the total Ar-41 release for the period July 1, 2020 - June 30, 2021 of 755. 7 mCi. Using level 2 in the code, the effective dose equivalent rate at the facility fence was computed to be 0.5 mrem/yr.
This is well below the 10 mrem/yr constraint specified in the regulation.
Any other releases were reported under the university's license with the state of Ohio.
6.B. Liquid Releases Hot sink releases are recorded and reported through the OSU Office of Radiation Safety. No releases were made from operation of the OSURR, and other releases were reported under the university's license with the state of Ohio.
6.C. Solid Releases No releases of solid radioactive material were made to the uncontrolled environment.
OSURR Annual Report Page 7 of 10 Sep 2021
- 7. Radiation Exposures Since the firm that maintains records for The Ohio State University keeps a year-to-date record, it is simpler to report radiation exposure records by the nearest completed calendar year.
Therefore, dosimetry badge exposures in this report are for the period January 1, 2020 to December 31, 2020. Seventeen individuals were monitored as radiation workers during this period, and the measured dose equivalent values are tabulated below in mrem.
Individual Dose Equivalent (mrem)
DOE LOE SOE, WB SOE, ME Visitors 0 0 0 n/a Staff member #1 18 22 25 28 Staff member #2 104 112 126 353 Staff member #3 2388 2389 2390 1737 Staff member #4 2271 2276 2289 1881 Staff member #5 1768 1769 1769 2933 Staff member #6 1962 1952 1920 0 Staff member #7 4 4 4 n/a Staff member #8 20 21 21 n/a Staff member #9 10 16 21 0 Student #1 4 4 9 0 Student #2 101 102 102 162 Student #3 5 8 9 31 Student #4 4 8 11 0 Student #5 11 13 14 52 Student #6 2 2 2 75 Student #7 41 41 41 83 Visitinq Scientist #1 2 2 2 0 '
OSURR Annual Report Page 8 of 10 Sep 2021
COMPLY: Vl.7. 7/6/2021 7:18 40 CFR Part 61 National Emission Standards for Hazardous Air Pollutants REPORT ON COMPLIANCE WITH THE CLEAN AIR ACT LIMITS FOR RADIONUCLIDE EMISSIONS FROM THE COMPLY CODE - Vl.7.
Prepared by:
Ohio State University Nuclear Reactor Lab Columbus, OH 43212 Andrew Kauffman 614-688-8220 Prepared for:
U.S. Environmental Protection Agency Office of Radiation and Indoor Air Washington, DC 20460 OSURR Annual Report Page 9 of 10 Sep 2021
COMPLY: Vl.7. 7/6/2021 7:18 OSU NRL FY2021 SCREENING LEVEL 2 DATA ENTERED:
Release Rate Nuclide (curies/YEAR)
AR-41 7.557E-01 Release height 10 meters.
Building height 11 meters.
The source and receptor are not on the same building.
Distance from the source to the receptor is 15 meters.
Building width 25 meters.
Default mean wind speed used (2.0 m/sec).
NOTES:
Input parameters outside the "normal" range:
None.
RESULTS:
Effective dose equivalent: 0.5 mrem/yr.
- Comply at level 2.
This facility is in COMPLIANCE.
It may or may not be EXEMPT from reporting to the EPA.
You may contact your regional EPA office for more information.
- END OF COMPLIANCE REPORT**********
OSURR Annual Report Page 10 of 10 Sep 2021