ML20212L771
| ML20212L771 | |
| Person / Time | |
|---|---|
| Site: | Reed College |
| Issue date: | 07/30/2020 |
| From: | Reed College |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| Download: ML20212L771 (17) | |
Text
REED RESEARCH REACTOR ANNUAL REPORT July 1, 2019 -- June 30, 2020 3203 Southeast Woodstock Blvd.
Portland, Oregon 97202-8199 503-777-7222 http://reactor.reed.edu reactor@reed.edu
TABLE OF CONTENTS Overview .................................................................................................................................... 1 People ......................................................................................................................................... 2 Reactor Staff ........................................................................................................................................ 2 Reactor Operations Committee (ROC) ....................................................................................... 3 Facilities ..................................................................................................................................... 4 Reactor Facility .................................................................................................................................. 4 Rotating Specimen Rack Facility .................................................................................................. 4 Pneumatic Transfer System........................................................................................................... 4 In-Core Facilities................................................................................................................................ 4 In-Pool Facilities ................................................................................................................................ 4 Beam Facilities ................................................................................................................................... 4 Inspections and Audits ............................................................................................................. 5 Confirmatory Order.......................................................................................................................... 5 Users ............................................................................................................................................ 6 Reactor Operations Seminar ......................................................................................................... 6 Outside Users ...................................................................................................................................... 7 High School Student Projects ........................................................................................................ 7 Reed Classes ........................................................................................................................................ 7 Industrial and Commercial Applications .................................................................................. 8 Reactor Operations ................................................................................................................ 9 Operations ........................................................................................................................................... 9 Unplanned Reactor Shutdowns ................................................................................................. 10 Reactor Maintenance ........................................................................................................... 11 Significant Maintenance............................................................................................................... 11 Radiation Protection ............................................................................................................ 12 Personnel Dosimetry .................................................................................................................... 12 Fixed Area Dosimetry ................................................................................................................... 12 Gaseous Releases............................................................................................................................ 13 Liquid Waste Releases .................................................................................................................. 13 Solid Waste Disposal ..................................................................................................................... 13 Environmental Sampling ............................................................................................................. 13
OVERVIEW This report covers the period from July 1, 2019 to June 30, 2020, and is intended to fulfill the reporting requirements of the U.S. Nuclear Regulatory Commission License No. R-112, Docket 50-288, the U.S. Department of Energy, and the Oregon Department of Energy Rule No. 345-030-010.
Reed College operates a 250 kW TRIGA Mark I reactor. The Reed College Research Reactor has been a resource for research and educational projects in the Portland area since 1968. The main uses of the Reed Research Reactor are instruction and research.
During the year there were 451 visitors from schools, colleges, universities, and special groups. An additional 509 visitors came as part of a Reed sponsored activity (prospective students, family of students, Reed classes, etc.). Twelve members of emergency response organizations came for training. Including tours and research conducted at the facility, the Reed Research Reactor contributed to the educational programs of 45 institutions.
During the year the reactor was taken critical 279 times on 109 days. The total energy produced was 14.50 megawatt-hours.
The reactor staff consists of a Director, a Reactor Operations Manager, and Reed College undergraduate students who are licensed by the Nuclear Regulatory Commission as reactor operators or senior reactor operators. During the reporting period, one RO candidate received an NRC license after passing the NRC exam administered in October 2019.
In March 2020 the Director took a leave of absence, which became permanent in June. An Interim Director was hired in March 2020. We hope to have a permanent replacement in place by September 2020.
There were no radiation exposures to individuals in excess of any limits during the year.
There were no releases of liquid radioactive material from the facility. Airborne releases were well within regulatory limits. There were no shipments of low-level radioactive waste from the facility.
The Nuclear Regulatory Commission did not conduct an inspection during this reporting period due to the pandemic. One external audit was performed in March 2020.
This reporting year is unique in that the nation is experiencing a pandemic. In March 2020 the college decided not to operate reactor except as necessary. We hope to resume operations for Reed students in Fall 2020.
On March 16, 2020 the NRC issued a Confirmatory Order to the reactor. It is discussed in this report under Inspections and Audits.
Reed Research Reactor Annual Report 2019-2020 1
PEOPLE Reactor Staff During the reporting period the staff consisted of the following:
Table 1 Supervisory Staff Reactor Director Stephen Frantz (Interim) 3/20 - present Melinda Krahenbuhl 6/11 - 3/20 Reactor Operations Manager Toria Ellis 6/19 - present Radiation Safety Officer April Sams 5/16 - present Operations Supervisor Val Lim 5/19 - 6/20 Training Supervisor Thomas Malthouse 5/19 - 6/20 Elena McKnight 5/18 - 6/20 Requalification Supervisor Sophie Bender 5/19 - 6/20 Projects Supervisor Addison Gyunn 5/19 - 6/20 Table 2 Staff Senior Reactor Operators (SRO)
Beatrice Barrar Addison Gyunn Yilian Liu Shawn Owens Sophie Bender Melinda Krahenbuhl Elena McKnight Matt Parson Bri Dobson Jonathan Li Thomas Malthouse Toria Ellis Val Lim Claire Mashlan Milander Reactor Operators (RO)
Abur-Rauf Ahmed Gavin Dury Jillian James Ethan Shek M Benesch Marie Faulkner Pratik Kafle Nemo Shen Kees Benkendorfer Yu Fu Kaitlyn Li Kaiyan Shi Ryen Burris Segovia Garcia Natalie Murphy Avantika Vivek Dorothy Cheng Stephaine Gee Patrick Park Rebecca Xie Ashlee Cook Emanuel Gordis Gio Ramirez Ismayn Ditter Megan Hilton Tenzin Sangpo Riyaz Ditter Matt Hwang Henry Scheffer Reactor Technicians Laura Estridge Samantha Hordyk Gianmatteo Martinez Laura Yosida The list of operators includes everyone who held a license at any time during the reporting period. Reactor Operators who upgraded their licenses to Senior Reactor Operators during the reporting period are listed under Senior Reactor Operators. On June 30, 2020 there were 25 licensed operators at Reed College.
2 Reed Research Reactor Annual Report 2019-2020
Reactor Operations Committee (ROC)
The membership of the Reactor Operation committee during the reporting period is listed.
Reactor Operations Committee
§ Lucas Illing, ROC Chair (Physics Faculty, Reed College)
§ Steve Reese (Radiation Center Director, Oregon State University)
§ Wayne Lei (Portland General Electric-retired)
§ Norm Dyer (OAR Services-retired)
§ Nigel Nicholson (Dean of the Faculty, Reed College)
§ April Sams (Director, Reed Environmental Health and Safety)
§ Jerry Shurman (Math Faculty, Reed College)
§ Melinda Krahenbuhl (Director, RRR)
§ Stephen Frantz (Interim Director, RRR)
§ Toria Ellis (Reactor Operations Manager, RRR)
§ Val Lim (Supervisor, RRR)
Reed Research Reactor Annual Report 2019-2020 3
FACILITIES Reactor Facility In addition to the reactor, Reed College has a radiochemistry lab. The equipment includes high purity germanium gamma spectrometers, ion chambers, beta counters, Geiger Muller tubes, and alpha detectors. These instruments are used for experiments and training in nuclear science and radiation detection. One exit monitor is in the control room. A liquid scintillation detector serves both the reactor and broad scope license users. The reactor facility has several systems for performing irradiations, described below.
Rotating Specimen Rack Facility The rotating specimen rack is located in a well on top of the graphite reflector surrounding the core. The rack consists of a circular array of 40 tubular receptacles, each of which can accommodate two irradiation tubes. The rack automatically rotates during irradiation to ensure each sample receives the same neutron flux. The thermal neutron flux in a rotating rack position at full power is approximately 1.7 x1012 n/cm2s with a cadmium ratio of 6.
Pneumatic Transfer System The pneumatic transfer system (rabbit) consists of an irradiation chamber in the outermost F-ring of the core and its associated glovebox, blower and piping. This allows samples to be transferred in and out of the reactor core very rapidly while the reactor is at power. The flux in the core terminal at full power is approximately 5x1012 n/cm2s.
In-Core Facilities The central thimble is a water-filled irradiation chamber about 3 cm in diameter. It provides the highest available neutron flux at full power, approximately 1x1013 n/cm2s.
Foil-insertion holes, 0.8 cm in diameter, are drilled at various positions through the grid plates. These holes allow the insertion of special holders containing flux wires into the core to obtain three-dimensional neutron flux maps of the core.
In-Pool Facilities Near core, in-pool irradiation facilities can accommodate larger samples. Neutron fluxes are lower than in the rotary specimen rack. An iridium gamma irradiator is also in the reactor pool for gamma-only irradiations.
Beam Facilities The central thimble can be evacuated with gas, producing a vertical neutron beam. The flux above the beam exit at full power is approximately 1x106 n/cm2s.
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INSPECTIONS AND AUDITS Due to the pandemic, the Nuclear Regulatory Commission did not conduct any inspections during this reporting period. Note the NRC did conduct inspections in June 2019 and in July 2020, but they fall outside of this reporting period.
Dr. Cameron Goodwin, Director of the Rhode Island Nuclear Science Center (RINSC),
conducted an external audit on March 10, 2020. The audit discovered no significant concerns and provided several helpful suggestions.
Confirmatory Order On March 16, 2020 the NRC issued a Confirmatory Order (EA-19-071) to the Reed Research Reactor. The Confirmatory Order was issued due to a failure of the Director to disclose to the NRC potentially disqualifying medical information about two license applicants in 2015. In addition, the Director gave a Controlled Access Area key to an unauthorized individual.
The NRC concluded through its investigations that the Director had willfully failed to provide the NRC with required information, and the Director had willfully violated the Reeds Security Plan. As a result of the investigation the NRC suspended the Directors license for three years.
Reed College has agreed with the Confirmatory Order but disagreed that the Directors apparent violations were willful. Reed completed the actions required by the Confirmatory Order on June 10, 2020. Many requirements of the Confirmatory Order will remain binding on the reactor in the future.
Reed Research Reactor Annual Report 2019-2020 5
USERS Reactor Operations Seminar The Reed Research Reactor conducts an annual seminar series. This non-credit course serves as an introduction to nuclear reactor theory, health physics, and reactor operation.
Some of the students are hired and continue with in-depth reactor operator training. Most subsequently apply for a Reactor Operator (RO) license. If successful, the individual is hired to operate the reactor. Current ROs may take the NRC Senior Reactor Operator (SRO) exam to upgrade their licenses.
Due to the pandemic, the NRC only administered one exam during the reporting period.
One student was issued a Reactor Operator license after the successful completion of a make-up exam administered in October 2019.
Figure 1 shows the pass rate for RO and SRO since 2000. Figure 2 shows the number of RO and SRO license candidates since 2000.
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 SRO pass rate RO pass rate Figure 1 NRC License Exam Results 30 RO Candidates 25 SRO Candidates 20 15 10 5
0 2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 Figure 2 NRC License Candidates 6 Reed Research Reactor Annual Report 2019-2020
Outside Users During the reporting period there were 451 visitors from schools, colleges, universities, and special groups. Additionally, 509 individuals visited as part of Reed College activities (prospective students, family of students, Reed classes, etc.). Twelve members of emergency response organizations came for training.
Figure 3 is a graph showing the history of visiting groups since 2000.
40 35 Colleges and Universities High Schools/ Middle Schools/Elementary Schools 30 Special Groups Number of Tours 25 20 15 10 5
0 2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 Figure 3 Visiting Groups Many reactor tours include hands-on use of facility equipment to conduct experiments in radiation science, health physics, and nuclear physics. A typical lab involves determining the half-life of a sample of radioactive material.
Several special programs for gifted children use the reactor for projects. These are designed to enrich their educational program and prepare them for college. Some of the groups who use the reactor target minority and disadvantaged youth who are historically under-represented in science professions.
High School Student Projects The reactor continues to be used in independent science projects initiated by students from several Oregon and Washington State high schools. This years projects included:
- Silver self-shielding irradiation in the reactor
- Plant mutation study with a gamma source Reed Classes The Fall 2019 Nuclear Literatures class toured the facility.
Reed Research Reactor Annual Report 2019-2020 7
Theses:
- A biology major used the gamma source.
- A physics major had planned on irradiating superconductor samples for his thesis but was unable to complete the project due to the pandemic.
Industrial and Commercial Applications The Reed Research Reactor is available for industrial or commercial concerns when it does not conflict with our educational goals. The facility also provides radiation protection training to interested parties and schools in the area, including an annual Radiation Safety Officer (RSO) class. We also provide radiation meter calibration if requested.
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REACTOR OPERATIONS Operations During the reporting period the reactor was taken critical 279 times on 109 days. The total energy produced was approximately 14.50 megawatt-hours. Operating history by month appears in Table 3. A history of the data is shown in Figure 4.
Table 3 Operating Times Critical Days Operated MW-Hours July 2019 25 12 1.21 August 2019 26 13 1.92 September 2019 40 19 1.75 October 2019 30 13 1.90 November 2019 60 15 2.73 December 2019 17 8 0.44 January 2020 10 10 0.87 February 2020 39 9 1.79 March 2020 22 6 0.92 April 2020 0 0 0.00 May 2020 0 0 0.00 June 2020 10 4 0.97 Total 279 109 14.50 600 Times Critical Days Operated 500 Irradiations MW-hrs 400 300 200 100 0
2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 Figure 4 Operating History Reed Research Reactor Annual Report 2019-2020 9
Unplanned Reactor Shutdowns There were 7 inadvertent reactor shutdowns (scrams) during the reporting period as shown in Table 4. The number of unplanned reactor shutdowns since 2000 is shown in Figure 5.
Table 4 Unplanned Shutdowns Date Scram Channel Cause of Scram Jul 15, 2019 Percent RO was watching at Linear Channel.
Aug 26, 2019 Linear RO switched to auto rod and power increased quickly.
Aug 28, 2019 Linear Auto range was turned off.
Oct 5, 2019 Linear RO overshot target power of 230kW.
Jan 17, 2020 Linear RO was calibrating auto demand.
Jan 25, 2020 Linear RO went up in power too quickly.
RO not paying close attention to someone operating Feb 27, 2020 Linear under direction while they went up in power.
18 16 14 12 10 8
6 4
2 0
2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 Figure 5 Unplanned Shutdowns 10 Reed Research Reactor Annual Report 2019-2020
REACTOR MAINTENANCE Significant Maintenance Most maintenance items do not require a 50.59 Safety Review because they are screened out by our procedures. There were no 50.59 Safety Reviews required during the reporting period. Reactor staff performed routine equipment checks on a daily, biweekly, bimonthly, semiannual (January and July) and annual (January) basis as required by facility procedures. Reed College maintenance personnel assisted with routine preventative maintenance to auxiliary equipment. The following significant maintenance items were competed during the reporting period.
- Replaced the pool level detector with new model.
- Replaced the CAM vacuum pump.
- Adjusted the GSM low flow alarm weighting factor.
- Replaced a bearing on ventilation supply fan.
Reed Research Reactor Annual Report 2019-2020 11
RADIATION PROTECTION Personnel Dosimetry Dosimeters are changed on a calendar quarter schedule. Individuals are issued beta-gamma sensitive ring badges and whole-body badges.
The highest individual doses received were 7 mrem/quarter Deep Dose Equivalent (DDE) and 35 mrem/quarter Shallow Dose Equivalent (SDE). These doses are well below occupational dose limits and no further action was required.
Fixed Area Dosimetry Radiation levels are continually monitored to provide an indication of the average radiation levels in the reactor bay and dose outside the facility. All dosimeters monitor beta and gamma radiation. Three locations also measure neutron dose.
The Deep Dose Equivalent (DDE) radiation measured by fixed dosimeters during the period April 1, 2019 to March 31, 2020 are shown in Table 5. The dosimeters from April 1, 2020 to June 30, 2020 are currently being processed. An M indicates less than 1 mrem above background during the quarter.
Table 5 Area Radiation Dosimeters (doses are in mrem per calendar quarter)
Height Radiation Apr 1 - Jul 1 - Oct 1 - Jan 1 -
Location Total (m) Detected Jun 30 Sep 30 Dec 31 Mar 31 Reactor East Wall 1.5 b, g 8 10 4 1 23 Reactor North Wall 1.6 b, g 8 10 3 2 23 Reactor West Wall 1.0 b, g, n 13 10 2 7 32 Reactor South Wall 1.6 b, g, n 12 10 4 3 29 Reactor North Wall - High 2.3 b, g 12 11 2 1 26 Control Room 1.5 b, g 11 12 5 3 31 Outside North 2.8 b, g 7 5 M M 12 Outside Roof 0.4 b, g, n 35 6 M M 41 Outside East 1.5 b, g 4 2 M M 6 Outside South 0.4 b, g 4 4 M M 8 Counting Room 1.5 b, g 3 4 M M 7 12 Reed Research Reactor Annual Report 2019-2020
Gaseous Releases The only routine release of gaseous radioactivity is from 41Ar (1.83-hour half-life) and 16N (7.13-second half-life). These come from activation of pool water and air in the pool water and in the irradiation facilities. For the reporting period, the average gaseous activity at the site boundary was 1.18 x 10-10 µCi/ml, which would deliver a dose to a member of the public of approximately 0.6 mrem, well below regulatory guidelines and constraints.
Figure 6 shows the gaseous releases for each year since 2000.
1.E-08 1.E-09
µCi/mll 1.E-10 1.E-11 2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 Figure 6 Gaseous Release Activity (µCi/ml) at Site Boundary Liquid Waste Releases No liquid radioactive waste was released from the Reed Research Reactor during this reporting period.
Solid Waste Disposal There were no shipments of low-level radioactive waste from the facility during this reporting period.
Environmental Sampling Neutron activation analysis is performed on all environmental samples. Soil samples taken from the area surrounding the facility showed no activity above background. Water from the facilitys secondary cooling system and the nearby canyon were sampled for activation products and tritium; the water samples showed no activity above background.
Reed Research Reactor Annual Report 2019-2020 13