ML23088A199
| ML23088A199 | |
| Person / Time | |
|---|---|
| Site: | Kansas State University |
| Issue date: | 02/28/2023 |
| From: | Cebula A Kansas State University |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| Download: ML23088A199 (1) | |
Text
Alan Cebula, Ph.D.
Nuclear Reactor Facility Manager 3002 Rathbone Hall 1701B Platt St Kansas State University Manhattan, KS 66506 USNRC Attn: Document Control Desk Washington, DC 20555-0001 28 February 2023
Subject:
2022 Annual Operating Report for the Kansas State University TRIGA Mark II Nuclear Reactor (Facility License# R-88, Facility Docket# 50-188)
To Whom It May Concern:
This document serves as the annual operating report for the Kansas State University (KSU) nuclear reactor. The report is divided into paragraphs addressing specific items listed as requirements in the Technical Specifications 6.11 e.
Sincerely, Alan Cebula, Ph.D.
Nuclear Reactor Facility Manager Kansas State University Attachments:
- 1. Kansas State University TRIGA Mark II Reactor Annual Report, CY 2022 Cc: Linh Tran, Project Manager, NRC Craig Bassett, Inspector, NRC
ATTACHMENT 1 KANSAS STATE UNIVERSITY TRIGA MARK II REACTOR ANNUAL REPORT Kansas State University TRIGA Mark II Reactor Annual Report, CY 2022 Introduction The Kansas State University Nuclear Reactor Technical Specifications (TS) require a routine written report to be transmitted to the US Nuclear Regulatory Commission within 60 days after completion of the first calendar year of operating, and at intervals not to exceed twelve months thereafter, providing the following information:
TS.6.11.e. l - A brief narrative summary of operating experience (including experiments performed), changes in facility design, performance characteristics, and operating procedures related to reactor safety occurring during the reporting period; and results of surveillance tests and inspections.
TS.6.11.e.2 - A tabulation showing the energy generated by the reactor (in megawatt-hours).
TS.6.11.e.3 - The number of emergency shutdowns and inadvertent SCRAMs, including the reason thereof and corrective action, if any, taken.
TS.6.11.e.4 - Discussion of the major maintenance operations performed during the period, including the effects, if any, on the safe operation of the reactor, and the reasons for any corrective maintenance required.
TS.6.11.e.5 - A summary of each change to the facility or procedures, tests, and experiments carried out under the conditions of 10.CFR.50.59.
TS.6.11.e.6 - A summary of the nature and amount of radioactive effluents released or discharged to the environs beyond the effective control of the licensee as measured at or before the point of such release or discharge.
TS.6.11.e. 7 - A description of any environmental surveys performed outside the facility.
TS.6.11.e.8 - A summary of radiation exposures received by facility personnel and visitors, including the dates and time of significant exposure, and a brief summary of the results of radiation and contamination surveys performed within the facility.
This information is transmitted in this report, in sections separated by TS clause. This report covers January 2022 - December 2022.
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ATTACHMENT 1 KANSAS STATE UNIVERSITY TRIGA MARK II REACTOR ANNUAL REPORT TS.6.11.e.1 - A. brief narrative summary of operating experience (including experiments performed), changes in facility design, performance characteristics, and operating procedures related to reactor safety occurring during the reporting period; and results of surveillance tests and inspections.
The KSU reactor remained in a shutdown state following the results of fuel inspections in CY2021. Investigation into methods and possible equipment needed to resolve the maintenance issue resulting in the shutdown was conducted and a'testing plan developed.
The reactor continued with its mission by supporting outreach and classroom activities.
Tour activities increased significantly compared to recent years. The number of tours doubled to 46 with about 340 visitors total. Although a considerable increase, tour volume remains much less than historical volumes of over 1,000 individuals per year.
Laboratories associated with the facility were used to support classes within the Mechanical and Nuclear Engineering Department. A reactor laboratory course utilized radioactive sources and high purity germanium spectrometers maintained by the reactor.
Another course for radiation detection was supported with the facility's cabinet x-ray system and radioactive materials.
The NRC routine annual inspection was completed from May 9-12, 2022. A report dated July 6, 2022 indicating no findings of significance was received as a result of the inspection (Inspection Report No. 05000188/2022201).
Results of monitoring water ingress into the beam port facilities show limited leaking.
Experience has shown a slight increase in leakage from beam port facilities with increasing primary pool temperature above typical room temperature. With no operations above the point of adding heat, primary pool temperature was easily maintained at room temperature throughout CY2022.
Bulk shield tank and primary pool cleaning and maintenance activities continued in preparation for refurbishing. Primary pool cleaning was improved through development of specialized pool cleaning nozzles. The new tools were designed to fit various surfaces in the tank and increased the efficiency of the cleaning process.
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ATTACHMENT 1 KANSAS STATE UNIVERSITY TRIGA MARK II REACTOR ANNUAL REPORT TS.6.11.e.2 - A tabulation showing the energy generated by the reactor (in megawatt-hours).
The monthly total energy generated by the KSU reactor is recorded in Table 1 and shown as a bar chart in Figure 1. Normal operations remained suspended from the results of fuel inspection findings in CY2021, so the facility had zero energy generated for CY2022. A total of 28.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> attributed to operations occurred during 2022. All hours were at zero power and were conducted for maintenance activities. The limited operating is reflected in Table 2 and Figure 2. Not reflected in the table and figure is the use of the reactor for outreach activities. Tours were still conducted without operating the reactor and at an increased level compared to CY202 l.
Table 1 - Energy generated by the KSU Triga Mark II reactor by month for CY 2022.
Month MWh Burnup January 0.00 February 0.00 March 0.00 April 0.00 May 0.00 June 0.00 July 0.00 August 0.00
_September 0.00 October 0.00 November 0.00 December 0.00 TOTAL 0~00 Page 3 of9
ATTACHMENT 1 KANSAS STATE UNIVERSITY TRIGA MARK II REACTOR ANNUAL REPORT MWh Burnup 1*-** **-****- 1-*. *--(*-*-
0ecember Si I I !
November a1 1 October a1 11 September a1 August a July G June a May aS'I i
! li M: al February a1 ,
i I i l I !
January~~- ---J----,L.... ,i ___ L_)_. ___ ! ___,_) .. - ) . " ' * * - - )
I MONTHLYMWH L_
Figure 1 ~ Energy generated by the KSU Triga Mark II reactor by month for CY 2022.
Table 2 - Operating hours grouped by purpose at the KSU TRIGA Mark II reactor for CY 2022.
Operating Purpose Time [hr)
Research 0 Tours 0 Classes 0 Maintenance 28.5 Training 0 Testing 0 TOTAL 28.5 Reactor Operations by Purpose
~ Rese~rch Tours Classes
- s Maintenance
= Training Testing Figure 2 - KSU TRIGA Mark II operations distribution as a percentage of total hours, CY2022, based on purpose of operation.
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ATTACHMENT 1 KANSAS STATE UNIVERSITY TRIGA MARK II REACTOR ANNUAL REPORT TS.6.11.e.3 - The number of emergency shutdowns and inadvertent SCRAMs, including the reason thereof and corrective action, if any, taken.
As shown in Table 3, there was one inadvertent SCRAM in CY2022 due to a spurious electrical spike in a power channel. No emergency shutdowns occurred during the time period reported. The number of inadvertent SCRAMs has remained low (CY 2021: 2, CY 2020: 2, CY 2019: 6, CY 2018: 20).
Table 3 - Inadvertent SCRAMs.
Date Action Comments Log Wide-range power channel (NLW) spiked for 4/1/2022 Period SCRAM fraction of a second. Electrical noise.
TS.6.11.e.4 - Discussion of the major maintenance operations performed during the period, including the effects, if any, on the safe operation of the reactor, and the reasons for any corrective maintenance required.
Various system maintenance was performed throughout CY2022 for part failure due to normal wear and tear. No effects on the safe operation of the reactor were observed. The following is a summary of all major maintenance activities during CY2022:
- Primary cleanup loop filter replaced twice during the year.
- Southeast beam port area radiation monitor moved to pool surface location to replace faulty detector module at the pool surface.
- Shim rod drive cable connector pieces separated. Cable connector re-seated in housing and reconnected. Function test satisfactory following repair.
- Transient rod down micro-switch actuator damaged: broken roller required replacement.
TS.6.11.e.5 - A summary of each change to the facility or procedures, tests, and experiments carried out under the conditions of 10.CFR.50.59.
All maintenance activities involved replacing malfunctioning components with same make and model equipment. No changes in facility, procedures, or experiments occurred during CY2022.
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ATTACHMENT 1 KANSAS STATE UNIVERSITY TRIGA MARK II REACTOR ANNUAL REPORT TS.6.11.e.6 - A summary of the nature and amount of radioactive effluents released or discharged to the environs beyond the effective control of the licensee as measured at or before the point of such release or discharge.
Per procedure, the concentration and total activity of liquid effluent were calculated prior to discharge, showing both to be below the limits in 10CFR20. Table 4 summarizes the average concentration and total activity released.
Table 4 - Summary of radioactive effluent (water)
Avg. Total Total Activity Isotope Concentration Volume Released (Ci)
. (Ci/mL) (mL)
Alpha-
<=Bkg l.21E7 <=Bkg emitters Beta-8.75E-11 l.21E7 l.05E-3 emitters TS.6.11.e. 7 - A description of any environmental surveys performed outside the facility.
Radiation surveys are performed within and around the facility to verify that radiation levels remain safe when at full-power operation. These surveys indicate that the dose rate (gamma and neutron) at the reactor dome does not exceed the hourly dose limit to members of the public of2 mrem/hr, as set forth in 10CFR20, which indicates that the outside dose cannot exceed this limit.
Since no high-power operations took place during CY2022, all radiation surveys of the operations boundary were at zero power. Gamma and neutron dose rates for all environmental surveys at the operations boundary revealed dose rates at background readings. Two thermoluminescence dosimeters (TLD) are placed at the operations boundary for environmental/area monitoring monthly. Table 5 summarizes the monthly TLD measurements for CY2022. Reports for January and December monitoring periods have not been received. All monthly dose measurements at the confinement boundary were reported as zero mrem.
Two of the ten control room door area monitor measurements were reported above minimum. Reactor staffTLDs are stored at the same location as the area monitor. For the April monitoring period, all five reactor staff had a reading above minimum (7-9 mrem) and similar to the area monitor dose reported dose. For the other month with dose above minimum reported on the area monitor, reactor staff doses range from zero to 16 mrem.
Overall, reported values for the control room door area monitor remain very low.
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ATTACHMENT 1 KANSAS STATE UNIVERSITY TRIGA MARK II REACTOR ANNUAL REPORT Table 5 - Environmental and Area Monitor Monthly Doses 2/1/2022 - 11/30/2022. NR- Not Reported Control Reactor Room Confinement Month Door (South)
[mrem] [mrem]
January NR NR February 0 0 March 0 0 April 7 0 May 0 0 June 0 0 July 0 0 August 0 0 September 0 0 October 2 0 November 0 0 December NR NR TOTAL 9 0 Page 7 of9
ATTACHMENT 1 KANSAS STATE UNIVERSITY TRIGA MARK II REACTOR ANNUAL REPORT TS.6.11.e.8 - A summary of radiation exposures received by facility personnel and visitors, including the_ dates and time of significant exposure, and a brief summary of the results of radiation and contamination surveys performed within the facility.
Dose reports have been received from the dosimetry vendor for February to November 2022 monthly whole body and first through third quarter 2022 quarterly extremity monitoring periods. As reported last year, the monthly dosimeter for November 2021 was not exchanged until 2022.
Overall, no staff exceeded 30 mrem total for a reported whole-body dose (Feb.-Nov.).
Table 6 shows the distribution of worker doses based on ten months of reports available.
For one staff member, 10 of the 17 mrem was acquired from another location. The
- average deep dose equivalent was 15 mrem with a maximum of 27 mrem. The lens dose equivalent and shallow dose equivalent also had an average of 15 mrem and a maximum for an individual of 27 mrem. Extremity monitoring had an average of 5 mrem and a maximum of 28 mrem for an individual. Overall, values are well below ALARA goals.
Table 6 - Summary of total occupational dose received by KSU reactor workers from 1/1/2022 -
11/30/2022.
Max mrem DDE LDE SDE Extremity
[0, 10] 2 2 2 5 (10, 20] 3 3 3 0 (20, 30] 1 1 1 1 (30, 40] 0 0 0 0 (40, 50] 0 0 0 0 (50,100] 0 0 0 0 (100,150] 0 0 0 0 (150,200] 0 0 0 0 Page 8 of9
ATTACHMENT 1 KANSAS STATE UNIVERSITY TRIGA MARK II REACTOR ANNUAL REPORT Visitor dose at the KSU TRIGA reactor facility is measured using self-reading pocket ion chamber dosimeters, with an indication range from 0-200 mR. Self-indicated pocket dosimeter readings suffer from imprecision due to parallax error, sometimes resulting in negative values or readings above the true value. Figure 3 summarizes the distribution of visitor exposures recorded. For a total of 447 visitor dose records, over 90% of the visitor dose records are at 1 mR or less.
2022 Visitor SRPD Records 388 400 350 fll "Cl 0
u 300
~ 250 5-~ 200 0
~ 150 E
Z 100 so 0
<=0 (0,1] (1,2] (2,5] (5,10] (10,20] (20,50] >50 Exposure [mR]
Figure 3 - Visitor self-reading pocket dosimeter (SRPD) records from CY 2022.
All monthly radiation and contamination surveys conducted at the facility in 2022 were nominal, and no action levels were exceeded.
This concludes the 2022 Annual Report for the Kansas State University TRI GA Mark II Nuclear Reactor.
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