ML14212A038

Uci, Annual Report Submittal, Tech Spec 6.7f

ML14212A038
Person / Time
Site:	University of California - Irvine
Issue date:	07/11/2014
From:	Geoffrey Miller University of California - Irvine
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML14212A038 (13)

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UNIVERSITY OF CALIFORNIA, IRVINE BERKELEY

• DAVIS - IRVINE i LOS ANGELES ° RIVERSIDE

• SAN DIEGO

• SAN FRANCISCO SANTA BARBARA - SANTA CRUZ George E. Miller IRVINE, CA 92697-2025 Senior Lecturer Emeritus (949) 824-6649 Departmentof Chemistry and FAX: (949) 824-6082 or (949) 824-8571 Director,NuclearReactor Facility Internet: GEMILLER@uci.edu July 11th 2014 US Nuclear Regulatory Commission Document Control Desk Washington, D.C. 20555-0001 Re: Docket 50-326; License R-116 Annual Report Submittal, Tech Spec 6.7f Gentlemen:

Please find enclosed three (3) copies of the annual report for the UCI Nuclear Reactor Facility, covering the period July 1st 2013 through June 30th 2014.

Electronic copies are being provided as indicated below.

Thank you.

Sincerely, George E. Miller Reactor Supervisor Cc.,w/enc (*electronic copies)

American Nuclear Insurance, 95 Glastonbury Blvd, Glastonbury CT 06033, Policy NF-176 Dean of Physical Sciences, Ken Janda

• Johnny Eads, US Nuclear Regulatory Commission

• Jason Lising, Project Manager, US Nuclear Regulatory Commission

• Reactor Operations Committee Members, UCI

U. C. IRVINE Nuclear Reactor Facility Annual Report for July 1st, 2013 to June 30th, 2014 Facility License R-116 Docket 50-326 Prepared in Accordance with Part 6.7f of the Facility Technical Specifications July, 2014 by Dr. George E. Miller, Reactor Supervisor Jonathan Wallick, Associate Nuclear Engineer UCI Nuclear Reactor Facility Annual Report 2013-2014 Page 1

Section 1. Operations Summary (additional details given below)

Operation of this facility supports UCI research and education programs in the Department of Chemistry (CHEM) and the Department of Chemical Engineering and Material Science (ChEMS).

Research is being conducted in application of radioisotopes as tracers and radiochemical analytical and separation techniques including applications to nuclear waste separations (ChEMS).

Reactor utilization, apart from operator training and maintenance, is for analytical sample irradiation and production of isotopic tracers. Analysis samples come from diverse origins related to forensic science, fossil fuels, geochemistry, art, and archaeological studies, chemical separations in nuclear fuel cycle experiments, chemical synthesis, industrial quality control, enzyme studies, trace element pollution studies, etc. The reactor is also used in class work by undergraduates learning tracer and activation analysis techniques using small quantities of short-lived activated materials.

Enrollment in the Fall Quarter 2013 laboratory course in Radioisotope Techniques using the facility was 34 students with 3 graduate teaching assistants, who also learned these techniques.

Support for UCI faculty and students includes grants from NRC and DOE (NEUP and NSSA), and partnerships with national laboratories (PNNL, LLNL, LANL, and INL. Security upgrades are in the process of being finalized, which have been funded by the DOE GTRI program.

Use is also made of the facility by other educational institutions, both for research and for visits/tours. A modest Nuclear Science Outreach program (NSOP) using UCI students to present talks and a laboratory to middle and high school classes has been continued. This program has also involved tours, class demonstrations, and analyses of samples submitted by faculty.

Operations have continued to increase as student use has increased. Criticality was achieved for 255.45 hours5.208333e-4 days <br />0.0125 hours <br />7.440476e-5 weeks <br />1.71225e-5 months <br />, and the total energy generated was equivalent to 180.66 hours7.638889e-4 days <br />0.0183 hours <br />1.09127e-4 weeks <br />2.5113e-5 months <br /> at full steady state power. 191 separate experiments were performed, and over 3695 samples were irradiated (sometimes multiple samples are included in a single capsule and are not always separately logged).

6 moderate level mixed isotope shipments were made, all Yellow II category, totaling 22.17 GBq of activity. Four relatively low power pulses were performed this year, all without incident. Four 50.59 changes were approved this year: (i) a new fuel temperature meter, (ii) new area radiation monitors, (iii) adding a UPS to the Continuous Air Monitor power supply, (iv) modifications to the start up check list. No unusual surveillance results/activities were noted/conducted during this period. One new experiment has been approved (UCI) for use of the Flow Loop Terminus, installed last year, by a current researcher in the Nilsson lab, specifically for research using Szilard-Chalmers reactions that might be used for producing medical isotopes.

A routine NRC inspection June 9th to the 12th of 2014, resulted in no Notices of Violation or follow-up items. In 2013-2014, Reactor Operations Committee meetings were held on Sept 3 0 th, 2013 and April 2 1 st, 2014 in accordance with Technical Specification requirements.

No follow-ups or incidents have been forthcoming regarding security or emergency response.

No exercise has been held this past year, but is planned shortly for the UCI EH&S radiological personnel, Orange County Fire Authority, UCI Police Department, Orange County Health Department, and reactor operators using lessons learned in GTRI training at the Y-12 site.

Inspections/audits continue to be conducted quarterly by the Radiation Protection staff of EH&S at UCI. These have identified that frequency schedules have been properly maintained, and results continue to show absence of significant levels of contamination or personnel exposure. A new Radiation Safety Officer has joined UCI's EH&S team upon the retirement of our previous RSO.

No NRC operator examinations have taken place this year, as no new trainees had been identified. As of June 3 0 th 2014, 4 SRO's and 6 RO's were active. I SRO is dormant.

UCI Nuclear Reactor Facility Annual Report 2013-2014 Page 2

Section 2. Data Tabulations for the Period July 1st, 2013 to June 30th, 2014 TABLE I.

Experiment Approvals on file 5 Experiments performed (including repeats) 191 Samples irradiated 3695 Energy generated this period (Megawatt hours) 45.17 Total, 69 element core = 127.0

>74 element core = 1470.67 Total energy generated since initial criticality 1597.67 Mwh Pulse operation this period 4 Total reactor pulses to 6/30/2014 985 Hours critical this period 255.45 Total hours critical to date 9348.55 Inadvertent scrams or unplanned shutdowns or events at power 3 Visitors to reactor - as individuals or in tour groups - 838 Maximum dosimeter recorded for visitors - all less than 0.2 mrem Visiting researchers (Temporary Self Indicating Dosimeters) 32 Maximum exposure recorded at one visit 3.7 mrem Visiting researchers (Thermoluminescent Dosimeters) 28 Students and teaching assistants in class, badged 37 Exposures reported for quarter (range: 0-22 mrem) average 14.7 mrem Isotope Shipments this period (mixed act'n products = 0.59 Ci total) 5 TABLE II Reactor Core Status 6/30/14 (core confimiration channed as~of 11/6/12*

Reactor Core Status 6/30/14 (core configi ation changedas of 11/6/12)

L Fuel elements in core (including 2 fuel followers) 84 Fuel elements in storage (reactor tank - used) 23 Fuel elements unused (4 instrumented elements + 1 element + 1 FFCR) 6 Graphite reflector elements in core 34 Graphite reflector elements in reactor tank storage 0 Water filled fuel element positions 2 Experimental facilities in core positions 5 Non-fuel control rods 2 Total core positions accounted for 127 Core excess, cold, no xenon (as of 6/28/2014) $2.88 Control rod worths (calibrated 12/4/2013) REG $2.99 SHIM $3.52 ATR $1.75 FTR $0.68 Total: $8.64

$2.43 Maximum possible pulse insertion (calculated)

Maximum peak power recorded ($1.75 insertion) 218 Mw Maximum peak temperature recorded in pulse (B-ring) 212.9 0 C UCI Nuclear Reactor Facility Annual Report 2013-2014 Page 3

Section 3.

Inadvertent Scrams, Unplanned Shutdowns, Events at Power TABLE III.

Date Time Power Type and Cause 2013 07/12 09:45 25 mw Linear scram. The Linear power monitor was left in the manual mode of range changing operation due to operator error during the start up.

The operator was counseled on proper start up procedures. Restart authorized by SRO.

08/21 10:00 75 mw Period scram. Mounting screws on amphenol connector on back of instrument had loosened, disrupting ground / common contact of scram connections. Amphenol screws tightened and condition cleared and was no longer reproducible. Restart authorized by SRO after verification.

2014 01/14 09:42 250 kw Linear scram. The UP button for the Regulating control rod became stuck in the depressed position. Operator did not respond quickly enough to prevent high power condition. Button was removed and cleaned and verified to operate correctly. Restart authorized by SRO.

UCI Nuclear Reactor Facility Annual Report 2013-2014 Page 4

Section 4 Maintenance and Surveillance and Other Incidents The following non-routine maintenance/surveillance activities were carried out during this period.

Any reactor operation related items have been included above and are not repeated here.

2013 July 29th On July 2 9 th, 2013, a failure of the radiation monitoring system had occurred and been consequently repaired. The failure was traced to a faulty voltage regulator internal to the high voltage power supply in the unit. The system is in process of being replaced with the GTRI security upgrades and should be a less problematic and reliable system.

Aug 21st On August 2 1 st, 2013, spurious reactor period scrams from the Wide Range Logarithmic Monitor prevented reactor startup. It was quickly discovered that the Amphenol plug on the back of the monitor which transmits the scram signals was slightly loose in mounting. After tightening the mounting screws, the condition cleared and reactor operation was restored to normal function.

Oct 7 th On October 7th, 2013, the NFT-1000 fuel temperature meter was replaced by three independent thermocouple reading meters manufactured by Laurel Electronics. The units had been connected in parallel with the NFT- 1000 for two months prior to the replacement to verify reliability of the new units. The unit has been operating without incident since the replacement and functions far more reliably than the previous NFT-1000. A 50.59 review is on file for this replacement. No safety issues are involved at this time. The Technical Specifications are satisfied by this new unit.

Dec 16 th On December 16 th, 2013, the water purification filters were rotated to correct an excessive differential pressure across the component due to particulate accumulation.

Initial differential pressure was 14 psid, and after rotating it was observed to be 9 psid. The radiation level of the used filters was measured to be less than 0.01 mr/hr on contact. The filters were scheduled to be replaced when additional filters were acquired.

Dec 4th On December 4"h, 2013, the SHIM, REG, ATR, and FTR rod calibrations were performed. A new preliminary core excess of $2.94 was found. Final results for rod worths were: SHIM $3.52 REG $2.99, ATR $1.75, FTR $0.68 for a total of $8.94.

On December 4th, power calibrations were also performed. 80.67% actual power was found for the previous setting of 80.0%, requiring slight adjustment of balance potentiometers on the channels. All instrumentation is now in correct alignment for calculated power level values.

UCI Nuclear Reactor Facility Annual Report 2013-2014 Page 5

2014 Jan 8t On January 8 th, 2014, the water purification filters were replaced to correct an excessive differential pressure across the component due to particulate accumulation.

Initial differential pressure was 11 psid, and after replacement it was observed to be

<1 psid. The radiation level of the used filters was measured to be less than 0.01 mr/hr on contact. The filters were stored for drying and later gamma spectrometry assessment. No unexpected radioisotopes (e.g., fission products) were found upon gamma spectrometry of the filters.

Jan 14' On January 14th, 2014, the wide range linear monitor output a linear power scram during a routine startup. This was due to the SHIM rod control up button sticking in the actuated position. The reactor operator did not respond quickly enough to this condition and reactor power was allowed to rise to the Linear Power Scram set point.

The instrument promptly scrammed the reactor. The cause was determined immediately and the SRO authorized restart of the reactor following cleaning of the button's immediately accessible internals. Operations returned to normal.

Feb 12'h On February 12th, 2014, the Continuous Air Monitoring (CAM) system was switched to be on the emergency power supply to the reactor room. During emergency generator testing performed the weekend prior to the change, a false High Airborne Contamination alarm and Air Monitor Failure alarm were sent in to the police department automatically. It was surmised that the root cause was a loss in power to the CAM, and therefore would be powered from an uninterruptable power supply connected to emergency power circuits provided to the reactor. A 50.59 review is on file for this change. No safety issues are involved at this time.

Mar 3 rd On March 3Pd, 2014, the radiation monitoring system was completely replaced with the new Horizon system provided by Canberra through the Global Threat Reduction Initiative program. Canberra provided a physical output from the system via 3 rd party electronics consisting of USB communication and relays. System has been completely functional and without incident since installation. A 50.59 review is on file for this replacement. No safety issues are involved at this time. The technical specifications are satisfied by these new units.

Apr 2 2 nd On Apr 2 2 nd, 2014, the water purification filters were changed due to low flow rates in the purification system. All radiological controls were in place and no contamination of personnel or equipment occurred.

May 29h On May 2 9th, 2014, the differential pressure between the reactor room and outside atmosphere was noted to be low and out of spec at -0.08" WC, failing to meet the minimum requirement of -0.10" WC. This was observed as an intermittent issue and only occurred later in the afternoon, possibly due to outside temperature changing or building ventilation changes. A trouble call to facilities was placed and the condition was corrected on June 12 th, 2014.

UCI Nuclear Reactor Facility Annual Report 2013-2014 Page 6

4 Section 5 Facility Changes and Special Experiments Approved Four 10 CFR 50.59 changes have been implemented during the course of the last year.

(1) Replacement of the trouble-prone (during start-up testing) fuel temperature meter by multiple small modules. Each of the modules performs the functions of the previous module and can be switched to at any time. Redundancy of the system has been improved immeasurably with this change and each module is technically identical to the NFT-1000 that was replaced.

(2) Replacement of the Eberline area radiation monitoring system (RMSII) with Canberra's Horizon system with EcoGamma and iR7040/GPOO units. The new system has 8 units, two more than the previous and function has been without problem. System is functionally similar, however it is now computer based as opposed to completely analog, but alarm contacts and relays are maintained functional.

(3) Inclusion of an uninterruptable power supply for the Continuous Air Monitors. This was determined to be necessary to prevent false alarms due to momentary drop outs of power during emergency diesel generator testing. Reliability of the system has been vastly improved.

(4) Documentation of the changes made to the start up check list. These changes were made to accommodate the new area radiation monitoring system and make minor changes to the layout of the list.

One new experiment was approved this year. A researcher from the UCI chemical engineering department under Dr. Mikael Nilsson has begun an experiment involving the modified cryogenic irradiation facility, now termed the flow loop terminus. The purpose of this experiment is to irradiate samples in the reactor utilizing a Szilard-Chalmers reaction, collecting recoiling nuclei from a target by passing a collecting fluid by the target sample. Irradiations using this system began in August. A 50.59 document for installation of this loop was filed in a prior year.

UCI Nuclear Reactor Facility Annual Report 2013-2014 Page 7

Section 6. Radioactive Effluent Release.

(a) Gases.

The major direct release to the environs is Argon-41 produced during normal operations.

Very small amounts of other gases may be released from irradiated materials in experiments.

Releases are computed based on original measurements at point of origin within the facility and taking only dilution into account. Since much of the release is from operation of the pneumatic transfer system for samples, this is a conservative estimate in that assumption is made that all use of the PT is at full steady state power level (250 kW) when, in fact, considerable use is with the reactor at a lower power level. In view of the small numbers involved, and the fact that an integrated dose check is provided by an environmental dosimeter (CaSO 4-Dy) hanging directly against the three exhausts as they enter final dilution and discharge, it is considered unnecessary to provide further checks of these estimates. The dosimeter data confirm that an individual standing directly against the exhaust flow for one year would receive an additional submersion dose from the exhaust less than the reliability limit of the dosimeters, or less than 20 mrem per year. The dosimeter data are presented separately in Section 7, Table IV. Over the years that data have been collected, the accumulated exposure at the exhaust locations have been lower than for "control" points because of lower masses of concrete structures in the vicinity. In fact the data have been consistently at 20-25 mrem per year below background level, so confidence of exposure less than 5 mrem over background seems possible.

Release estimates based on operational parameters are as follows:

(1) Operation of pneumatic transfer system (7/1/13-6/30/14):

a. Minutes of operation: 317.3 minutes

b. Release rate assumed: 6.0 x 10-8 microcuries/mL

c. Flow rate of exhaust air: 1.2 x 108 mL/min

d. Dilution factor: 0.01 Total release computed: (a x b x c x d) = 2.28 x 101 microcuries (2) Release from pool surface (7/1/13-6/30/14):

a. Total hours of operation at full power (Effective Full Power Hours) = 180.66 hours7.638889e-4 days <br />0.0183 hours <br />1.09127e-4 weeks <br />2.5113e-5 months <br />

b. Release rate assumed: 1.0 x 10-8 microcuries/mL

c. Flow rate of exhaust air: 1.2 x 108 mL/min

d. Dilution factor: 0.01 Total release computed: (a x 60 x b x c x d) = 1.30 x 102 microcuries

e. Total of (1) and (2) emission in 1 year = 1.52 x 102 microcuries

f. Total effluent released in 1 year (525960 minutes/yr. x c x d) = 6.3 x 1011 mL Concentration averaged over 12 months (elf) = ,-< 2.42 x 10.10 microcuries/mL Since 2 x 10-9 microcuries/mL provides an annual exposure for constant immersion of 10 mrem, this corresponds to < 1.0 mrem potential additional radiation exposure to an individual standing breathing in the effluent stack for the entire year.

Exhaust is diluted by a factor of 100 before release and the mixed plume is released at -100 feet above the roof level (200 feet above surrounding ground).

UCI Nuclear Reactor Facility Annual Report 2013-2014 Page 8

(b) Liquids and Solids.

Liquid and solid wastes from utilization of by-product materials are disposed through a university contract. Waste is transferred to the custody of UCI Environmental Health and Safety (EH&S). Disposals to this custody are given below. It is important to note that activity values are estimated at the time of transfer to EH&S control. Since few shipments are being made from campus, decay to negligible levels occurs for all medium-lived radionuclides. Teaching course items (used for training in liquid scintillation counting and isotope dilution analysis techniques) may be a mixture of reactor generated byproducts and purchased materials (exclusively 14 C and 3m).

DRY WASTES:

Four transfers of 2 cubic foot containers of dry waste were disposed during this period (7/1/13 through 6/30/14), estimated at a total quantity in 8 cu ft of 35.1 microcuries of mixed activation products (measured as 60Co equivalent at time of transfer).

LIQUIDS:

One transfer of a 2.5 gallon liquid constituent was made this year. The contents of the container included 8.253 microcuries of 3JH along with 0.05% traces of (non-radioactive)

NaF.

UCI Nuclear Reactor Facility Annual Report 2013-2014 Page 9

Section 7.

Environmental Surveillance.

Calcium Sulfate/Dysprosium thermoluminescent dosimeters are in place at 12 locations around the UCI Campus for environmental monitoring purposes. Starting July 1 2004, these are provided by Global Dosimetry Solutions (GDS), a division of Mirion Technologies, Costa Mesa, California. The GDS packs have three chips in each pack which are averaged for exposure recording. GDS runs multiple control samples in addition to the locations listed below. All dosimeters are housed in small metal lock-boxes (except for locations 10 and 12). The table below lists the locations. The tocations on exhaust ducts have been changed following upgrade of Rowland Hall (and facility) ventilation systems. An additional dosimeter has been located in Engineering Tower, Room 521 (#12), where irradiated materials from the reactor may be further handled, for a total of 12.

Routine contamination surveys consisting of wipe tests and G-M surveys have shown mostly a "clean" facility with significant, removable contamination only in areas coming into direct contact with samples removed from the reactor, and on sample handling tools. Trash is surveyed before disposal and not disposed unless found to be free of removable and fixed contamination.

Table of Locations for Environmental Dosimeter Packs.

1. South Reactor Facility Perimeter

2. West Reactor Facility Perimeter

3. North Reactor Facility Perimeter

4. Rowland Hall Main Air Exhaust Fan 1

5. Rowland Hall, First Floor Hallway Over Reactor Facility

6. McGaugh Hall Top Floor

7. Langson Library Top Floor

8. Reines Hall Top Floor

9. Rowland Hall Main Air Exhaust Fan 2

10. On-Campus Faculty Housing

11. Rowland Hall Main Air Exhaust Fan 3

12. Engineering Tower Room 521 UCI Nuclear Reactor Facility Annual Report 2013-2014 Page 10

TABLE IV.

Environmental Dosimetry Data.

2013-2014 Average Total Exposures in mrem (including "control background")

Location. Annual Prior year Excess(13-14) over control 2/13 3/13 4/13 1/14 Total Totals mr 2013/14 2012/13 ANNUAL

1. S. Facility perimeter 28 32 26 37 123 122 +8

2. W. Facility perimeter 43 77 34 38 192 127 +77

3. N Facility perimeter 31 35 29 38 133 125 +18

4. Rowland exhaust fan 1 23 26 20 31 100 94 -15

5. Hallway over facility 24 28 22 33 107 100 -8

6. McGaugh Hall top floor 26 29 23 33 111 102 -4

7. Langson Library top floor 30 35 30 39 134 125 +19

8. Reines Hall top floor 27 32 25 35 119 112 +4

9. Rowland exhaust fan 2 23 26 21 32 102 95 -13

10. Faculty housing 26 29 21 33 109 96 -6 11 .Rowland exhaust fan 3 23 28 21 32 104 93 -11 12 Engineering Tower 521 24 27 21 33 105 111 -10 Background control (GDS) 25 29 24 37 115 112 +3 Discussion Raw data is presented here, along with controls and prior year comparisons. Within this range, the data vary with significant consistency. Locations 1, 3, and 9 are usually the highest, 10 the lowest.

Data for this year reflects several issues:

" Location 7 is on the top floor of a large building and may experience greater cosmic flux, as well as concrete releases.

" Locations 1, 2, and 3 can be attributed to the increased usage of the reactor for this time period (almost double the value of last year).

" Location 1 is a hallway with an extremely low occupancy rate. (See additional note below).

" Location 2 is on the other side of a location in the reactor facility temporarily used for source storage.

" Location 3 is on a heavy concrete wall.

Exposure estimated to a single individual in an uncontrolled area at this facility is minimal.

Locations 1, 2, and 3 are in hallways with extremely minimal occupancy or travel, especially since security policy is to maintain permanently locked doors to the hallways on this floor level (access only with building keys). The rooms overhead (location 5) are casually occupied by very few individuals (one or two at the most) in the space above the reactor core. The air released from the facility/building (measured by locations 4, 9, and 11) continues to give no detectable exposure above background. Over many years, the data at each specific location has shown remarkable consistency.

The net conclusion is that, within precision of measurement, and compared to distant control areas (numbers 7 and 10), we are operating with very minimal levels (within statistical error of zero) of potential (full 24/7 occupancy) public exposure over normal background levels.

UCI Nuclear Reactor Facility Annual Report 2013-2014 Page I11

Section 8. Radiation Exnosure to Personnel.

Personnel exposure data are summarized in Table V-I.

UCI issued TLD badges to UCI students or researchers regularly utilizing radiation. Finger dosimetry (TLD) rings are also issued to personnel who might be regularly handling radioactive sources. TLDs are read quarterly by Mirion (GDS), and results are presented in Table V-I. Data are for 4 quarters of operations since April 1, 2013. Reporting categories are DEEP, EYE, and SHALLOW. Other individuals visiting or casually working in the facility were issued DOSIMAN/R for which results are shown in Table V-Il. 40 persons were issued TLD badges on a continual basis; 39 were also issued with finger TLDs. 34 students and 3 teaching assistants in a Radioisotope Techniques class were TLD badged. The lab component met for 40 hours4.62963e-4 days <br />0.0111 hours <br />6.613757e-5 weeks <br />1.522e-5 months <br /> during the quarter.

Reported exposures fell in a narrow range averaging 14.7 mrem each person for the quarter.

Table V-II. also lists all visiting individuals that were issued with DOSIIMAN/R monitors that record in units of 0.1 mR. In the course of a few hours, a worker can accumulate 0.2 mr. A tour visitor accumulates 0.0 or 0.1 mR during a 45 minute visit to the facility. Any reading above 0.2 is thus tabulated separately.

TABLE V-I.

Personnel Exposure Report Summary for 12 months: 4/1/13 to 3/30/14 (in millirem)

Individuals Whole Body Finger Ring DEEP EYE SHALLOW (hallow-)

21 15 45 79 609 92 10 10 10 118 29' 0 0 0 349 Totals 25 55 89 1076 374 Range 0-22 (mean 14.7) Range 0-22 (mean 14.7) Range 0-22 (mean 14.7) not issued class total 544 544 544 -

Totals 569 599 633 1076 (77 individuals) (77 individuals) (77 individuals) (39 persons)

TABLE V-Il Aggegated non-zero data from self-reading dosimeters issued to researchers or visitors in addition to TLD badges are:

Persons Admissions Total Accumulation (per person) (mrem) 321 3 each on average 14.4 132 other visitors logged 3 each on average 8.6 706 in tour groups 5 leach 0.0 to 0.1 each monitor Total 870 persons Total 1081 Total 23.0 mrem

1. Individuals doing extensive or casual activation analysis and radiochemical work at the facility. Most of the exposure is a result of CI-38 or AI-28 radioactivity production..

2. Individuals receiving exposure as a result of shipping isotopes, and/or calibration activities in the facility.

3. Individuals who did enter but not carry out radiation related activities during this period, so any exposure reported is an indication of range of general background/precision where the badges are stored when not in use.

4. Reported for students and teaching assistants in Radioisotope Techniques class Sep-Dec 2013. Note badges kept 24/7 in laboratory room. All also ran samples by NAA as well as working with sealed sources.

5. Issuing I dosimeter each for groups up to 10 and 10 randomly for larger groups. No readings > 0.2 mrem were recorded.

Personnel exposures continue to be very low at this facility in keeping with ALARA efforts. Fewer isotope shipments have been made this year, so exposure from that activity is lower.

UCI Nuclear Reactor Facility Annual Report 2013-2014 Page 12