ML15191A047

Submittal of 2014 Annual Report for University of California Davis/Mcclellan Nuclear Research Center

ML15191A047
Person / Time
Site:	University of California-Davis
Issue date:	06/29/2015
From:	Steingass W McClellan Nuclear Research Center
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML15191A047 (23)

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5335 PRICE AVENUE, BUILDING 258 McCLELLAN, CA 95652 PHONE: (916) 614-6200 FAX: (916) 614-6250 Ut DAVIS WEB: http://mnrc.ucdavis.edu MNRC~

McCLEULAN NUCLEAR RESEARCH CENTER SACRAMENTO, CA 95652 PHONE: (916) 614-6200 FAX: (916) 614-6250 29 June, 2015 United States Nuclear Regulatory Commission Attn: Document Control Desk US Nuclear Regulatory Commission Washington, D.C. 20555-001 Re: 2014 Annual Report for University of California Davis/ McClellan Nuclear Research Center, Docket No. 50-607, License No. R-130 To Document Control Desk:

Attached is the 2014 annual report for the McClellan Nuclear Research Center, submitted in accordance with the reporting requirements of the Technical Specifications document MNRC-0004-DOC-13 paragraph 6.7.1.

Thanks and Regards, Walter Stein ass Associ e Director for Operations McCle Ian Nuclear Research Center

MNRC*

2014 ANNUAL REPORT Docket Number 50-607 License Number R-130

MAYRC4 WORL W.k f5.M

• t UCD/MINRC ANNUAL REPORT FOR 2014

1. Introduction The University of California, Davis, McClellan Nuclear Research Center (MNRC) consists of a research reactor, associated radiography and positioning equipment, and a wide variety of equipment to support broad-based research activities. This MNRC Annual Report is published each year in support of the license provided by the United States Nuclear Regulatory Commission (NRC).

The aforementioned license is for the operation of a steady-state TRIGA' reactor with pulsing and square wave capability.

It is the primary intent of this document to provide information relevant to the safe operation of the UCD/MNRC. A brief description of the MNRC facility and administration is followed by operational events and health physics information concerning this facility during CY 2014.

2. UCD/MNRC Facility Description The UCD/MNRC is located on the McClellan Industrial Park site; the reactor is housed in Building 258. The McClellan Industrial Park site is approximately 2600 acres, located eight miles northeast of Sacramento, California.

The UCD/MNRC facility is a three level 14,720 sq. ft. rectangular-shaped enclosure that surrounds a 2 MW research reactor. The UCD/MNRC provides four neutron beams to four bays for radiography and other research and commercial activities. All four bays are capable of using radiography film techniques, but Bays 1 and 3 normally use electronic imaging devices. Space, shielding and environmental controls are provided by the enclosure for neutron radiography operations performed on a variety of samples. Adequate room has been provided to handle the components in a safe manner.

In addition to the radiography bays, the UCD/MNRC reactor also has several in-core facilities ranging from a pneumatic tube system to a central irradiation facility.

For more detailed information on the UCD/MNRC project, the reader is referred to the UCD/MNRC Safety Analysis Report.

3.0 UCD/MRC Administration UCD/MNRC Organization. The UCD/MNRC is licensed by the Nuclear Regulatory commission (NRC) to operate under the provisions of operating license R-130.

The University of California Regents have designated the Chancellor at UC Davis to be the license holder. The UCD Chancellor has in-turn delegated the Vice Chancellor for Research to be the licensee of record.

The UCD/MNRC is under the direction of the UCD/MNRC Director.

UW/WNRC A -,,W Rqd t 2014 1

MNRC*

If DAVIS UCD/MNRC ANNUAL REPORT FOR 2014 4.0 Facility Modifications (Section 50.59 of 10CFR Part 50), and experiments.

None 5.0 Approved Changes to Experiments

1. Approved K-4-20 change, Added allowance for 02N2 gas mixture vs. He gas for Neutron Irradiator experiments

2. Approved K-4-46 change, Changed experiment name to General Radiography of Class I Energetics 6.0 Licensing and Regulatory Activities 6.1 NRC Items

a. The Nuclear Regulatory Commission conducted a semi-annual audit the week of 10 February 2014. No significant findings reported.

b. The Nuclear Regulatory Commission conducted an audit the week of 8 September 2014. No significant findings reported.

c. Nuclear Regulatory Commission Examiner performed licensing examinations for 2 SRO candidates and 1 RO candidate on 29-30 July 2014

d. Notified by letter effective May 27, 2014 that Al Adams is no longer our Program Manager, New PM is Ms. Linh N. Tran.

6.2 Nuclear Safety Committee (UCD/NSC)

a. The Nuclear Safety Committee Chairman performed an audit on 13 January 2014.

b. The Nuclear Safety Committee held its semi-annual meetings on 6 February and 3 September.

c. The Nuclear Safety Committee performed an audit of the Radiation Safety Program during the month of November.

d. The Nuclear Safety Committee performed an Operations audit on 2 September 2014.

e. The Nuclear Safety Committee performed a Security audit on 3 September 2014.

7.0 OPERATIONS OPERATING HISTORY:

TOTAL OPERATING HOURS THIS YEAR: 1100.22 TOTAL OPERATING HOURS: 48416.33 TOTAL MEGAWATT HOURS THIS YEAR: 1032.85 TOTAL MEGAWATT HOURS: 63255.44 TOTAL NUMBER OF PULSES PERFORMED THIS YEAR: 0 TOTAL NUMBER OF PULSES PERFORMED: 484 UcD/ASRC Annual Rgon 2014 2

9l+/-*1 tftX",CJl MMUILANWM UCD/MNRC ANNUAL REPORT FOR 2014 7.1 UNSCHEDULED REACTOR SHUTDOWNS and NOTED PROBLEM AREAS:

In 2014, there were two (2) unscheduled shutdowns at the MNRC reactor facility. The following is a list of the unscheduled shutdowns:

2014 UNSCHEDULED REACTOR SHUTDOWNS TOTAL NUMBER OF UNSCHEDULED SHUTDOWNS IN 2014 2 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec CSC 0 0 0 0 0 0 0 0 0 0 0 0 Other 0 0 0 0 0 0 0 0 2 0 0 0 Notes 1 Notes:

1: Loss of off-site power twice on the same day due to weather (high winds knocked out power lines)

January

1. There were no unscheduled shutdowns in the month of January.

2. There was one callback to the facility in January.

a. Uninterruptable Power Supply (UPS) fault caused by power interruption to the facility, cleared on acknowledgement.

Februatfry

1. There were no unscheduled shutdowns in the month of February.

2. There was one callback to the facility in February.

a. Stack Continuous Air Monitor (CAM) fault, alert, alarm.

Particulate channel read 0 cpm. Started Reactor CAM. Replaced Stack CAM particulate channel Gross Detector card. All retests Sat.

March

1. There were no unscheduled shutdowns in the month of March.

2. There were no callbacks to the facility in March.

April

1. There were no unscheduled shutdowns in the month of April.

2. There were no callbacks to the facility in the month of April.

1. There were no unscheduled shutdowns in the month of May.

2. There was one callback to the facility in the month of May.

a. Rod Withdrawal Prohibit (RWP)alert, cleared on acknowledgement.

UCD/AMNC A fud Rwtwt 2014 3

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%~UPIqxVENO~c l rCo UCD/MNRC ANNUAL REPORT FOR 2014 June

1. There were no unscheduled shutdowns in the month of June.

2. There were six callbacks to the facility in the month of June.

a. All were Rod Withdrawal Prohibit alerts, all cleared on acknowledgement.

July

1. There were no unscheduled shutdowns in July.

2. There was one callback to the facility in the month of July.

a. UPS fault, cleared on acknowledgement.

August

1. There were no unscheduled shutdowns in the month of August.

2. There were two callbacks to the facility in the month of August.

a. UPS fault. Cleared on acknowledgement.

b. Stack CAM alarm, cleared on acknowledgement. All readings and histories are normal, no indication of cause of spike.

September

1. There were two unscheduled shutdowns in the month of September:

a. Loss of building AC power (offsite power), on two occasions on the same day. Manually scrammed the reactor both times.

2. There were no callbacks to the facility in the month of September.

October

1. There were no unscheduled shutdowns in the month of October.

2. There were two callbacks to the facility in the month of October.

a. Both were Rod Withdrawal Prohibit alerts, cleared on acknowledgement.

November

1. There were no one unscheduled shutdowns in the month of November.

2. There was one callback to the facility in the month of November.

a. UPS fault. Cleared on acknowledgement December

1. There were no unscheduled shutdowns in December.

2. There was one callback to the facility in the month of December.

a. Rod Withdrawal Prohibit alert, cleared on acknowledgement.

UCD/1,RC AnaM Repomt 2014 4

t (DAVlS i M R O A-c"W"4 UCD/MNRC ANNUAL REPORT FOR 2014

7.2 ANCOALIES

During 2014, there was 1 reported anomaly at the MNRC facility and no Radiological Incident Investigations. The specifics are listed below December There was one anomaly reported in the month of December. The report is as follows:

Anomaly Report 12/1/2014 0700 Reactor Power Level - Shutdown for Annual Maintenance Failure of the Emergency Generator to start.

The UCD/MNRC has a series of weekly maintenance items that are performed the first work day of each week. One of these items is the periodic exercise of the Emergency propane Generator to verify operability in order to satisfy conditions to operate above 1.5 Megawatts if required. On Monday December 1, 2014 the generator failed to start as programmed.

Several attempts were made to manually start and run the generator and to troubleshoot the problem but were unsuccessful, sometimes with a very loud response.

There were no problems found with fuel, fuel lines, fuel filters, the battery, etc.

This Monday (12/1) was also the first day of the Annual Planned Maintenance shutdown period and as such no reactor power operations were anticipated for about 2 weeks.

The generator is not required for operations below 1.5 Megawatts and when the reactor is shutdown. It is only required for Emergency Core Cooling operations in the event that the reactor core is uncovered or about to be uncovered after an extended period of high power operations and building power is lost in accordance with OMM 5160, and Technical Specifications Section 3.3 Reactor Coolant Systems section d.

Actions to correct the Anomaly:

The vendor that the UCD/MNRC uses to perform corrective or non-routine maintenance on the generator was contacted for the troubleshooting and repair work. The vendors' technical staff was unable to successfully troubleshoot the problem and ultimately decided that the unit needed to be replaced due the problem and the non-availability of some replacement parts.

At this time the UCD/MNRC Electronics Engineer began looking into the problem and discovered that there was a corrosion/loose connection issue with the points in the distributor and that the spark plug wires were old.

44 WMCA &n.

Rtpo 2014 5

iC DAVIS MNII~* rAV lf~ulvv. 9A4'1-1 UCD/MNRC ANNUAL REPORT FOR 2014 The spark plug wires were replaced and the connection at the distributor for the points was cleaned and tightened.

The generator was run satisfactorily several times in manual and started successfully when programmed.

Reliability was re-established on 12/19/2014.

Actions to prevent reoccurrence:

As part of the annual inspections of the generator set, special attention will be placed on looking at the distributor wiring and the spark plug wiring, both were original to the set and in excess of 20 years old.

7.3 MAINTENANCE OTHER THAN PREVENTIVE:

January System # Description Work Performed 5130 Secondary Cooling Repair leak in tower. Reattached balance clean Tower chamber boot and mounting bracket 5130 Secondary Pump Replaced failed pump discharge pressure gage Februa System # Description Work Performed 5510 Pneumatic Transfer Replaced PTS blower HEPA filter System Stack Continuous 1001 Air Monitor (CAM) Replaced Particulate channel Gross Detector Card 5640 AC-7 (Bay 2 Replaced unit Safety Switch, replaced controller ventilation) card, added refrigerant 5490 Helium Supply Replaced expended He supply bottle System March System # Description Work Performed Equipment room Replaced GM tube in Equipment Room and Spare 1020 Radiation Area Monitor (RAM) 1800 Reactor Ventilation DOP test Reactor Room Exhaust filters 1803 Rad-Vac DOP test Radiological Vacuum Cleaner UCAfDMNWC And RWeWr 2074 6

UIDAVS A MNKRCM0Q WMULAN OLA-M' ftatAM4V'JfftR UCD/IMNRC ANNUAL REPORT FOR 2014 April System # Description Work Performed 5330 NM-1000 Replace + 15 volt and -15 volt power supplies to correct noise issues.

5330 NM-1000 Replace two power supplies in lower cabinet to correct noise issues.

Replace relay K-3 on ActionPak shelf of Digital 5330 DAC Acquisition Cabinet (DAC) to correct erratic indications during manual test.

System # Description Work Performed 1001 Stack CAM Replaced Particulate Channel Gross Detector Channel Card 5490 Helium Supply Replaced expended He supply bottle System 5490 Helium Supply Relocate noise suppression snubbers on pressure System switches June System # Description Work Performed 1001 Stack CAM Replaced CRT display due to intermittent loss July System # Description Work Performed 5490 Helium Supply Replaced expended He supply bottle 1001 Stack CAM Install switch on Stack CAM Check Source pump 5740 Building Fire Replaced 5 HP air compressor for sprinkler dry Sprinkler System pipe Auust System # Description Work Performed Replace leaking joint in Bay 4 staging are fire 5470 Fire Suppression header, leak check sat.

Troubleshoot/repair UPS Fault/Alarm. Left system Uninterruptable shutdown for several hours. Performed checks on (56PS) all electronic circuit boards and fuses. Reenergized unit, operations sat. No repairs performed.

5490 Helium Supply Replace expended He supply bottle 5640 AC-7(Bay 2 Replace AC-7 with current replacement model Ventilation) I

&RC AMWWdRdpt 2014 7

(CDAVIS AMNRC&ý UCD/MNRC ANNUAL REPORT FOR 2014 September System # Description Work Performed 5130 Secondary Cooling Replace conductivity card for Cooling Tower water System treatment system Removed/cleaned/inspected and reassembled the Demin system resin bottle outlet strainer due to Demineralizer degraded flow. Found an even layer of resin fines System coating the inner surface of the strainer element.

Element cleaned with acetone and distilled water.

Leak check sat.

October System # Description Work Performed 5490 Helium Supply Replace expended He supply bottle November System # Description Work Performed 1001 Stack CAM Replace failed blower motor 1001 Stack CAM Replace blower motor oil drain fitting 1001 Stack CAM Replace all four castor/wheels on unit December

1. MNRC completed the annual reactor maintenance shutdown during the month of December. Technical Specification required periodic maintenance as well as general maintenance was performed.

2. Parametric values noted during testing are as follows:

Control Rod Worth:

Transient Rod: $1.95 Shim 1: $2.64 Shim 2: $2.54 Shim 3: $2.75 Shim 4: $2.99 Regulating Rod: $2.82 Control Rod Scram Drop Times:

Transient Rod: 0.35 sec Shim 1: 0.38 sec Shim 2: 0.37 sec Shim 3: 0.40 sec Shim 4: 0.39 sec Regulating Rod: 0.39 sec Shutdown Margin: $5.84 A preliminary nuclear instrument calorimetric calibration was performed. Both the NPP channel and the NM-100 channels of the Nuclear Instruments were satisfactory, and no adjustments were required.

High Power Scram checks and the final calorimetric were deferred until the emergency generator repairs were completed to permit operation at greater than 1.5 Megawatts.

UGDS9C An.*.,Rwfpt 2014 8

MINNLRC* UCD/IMNRC ANNUAL REPORT FOR 2014 Emergency generator repairs were completed and the unit was retested satisfactorily (and reliability confirmed) and returned to service on January 5, 2015.

On January 5, 2015 the last of the 2014 Annual Shutdown maintenance items were completed.

The normal nuclear instrument calorimetric calibration was performed. Both the NPP channel and the NM-I00 channels of the Nuclear Instruments were satisfactory, and no adjustments were required.

At Power Scram values: NPP-1000: 106% indicated, NM-1000: 105% indicated.

System # Description Work Performed 1001 Bay Continuous Air Replaced Particulate Channel check source Monitor (CAM) solenoid 1001 Bay CAM Replaced wheels on unit 1001 Stack CAM Replaced Argon Channel check source solenoid 5640 HV-3 (Bay 4 Staging Replace belt on HV-3 Area) 5490 Helium Supply Replace expended He supply bottle 7.4 Training January

1. One Operator Trainee received Environmental Survey training.

February

1. There was no scheduled training for the month of February March

1. All licensed Senior Reactor Operators were administered and passed the biennial requalification exam.

2. One student was trained on Radiological Lesson Plan B (Working with Radioactive Materials)

3. Licensed Senior Reactor Operators and trainees received training on Design and Operating Characteristics.

4. All Licensed Senior Reactor Operators and trainees received training on document revisions to Radiation Safety Procedures.

April

1. All facility personnel attended ALARA/Safety/Security training.

2. RSO attended DOT Hazardous Shipping training.

3. Hosted and conducted training for University of California Berkeley Nuclear Engineering classes. (Classroom and Practical Lab training)

UCD/WNC ArWRWg 2014 9

I. {hMIS 1AM'N RCA"01 6 VVMULANWXJWAMMM5AýCýMmtl" UCD/MNRC ANNUAL REPORT FOR 2014

1. MNRC conducted an all hands Annual Security Drill, involving Sacramento County Sheriff Department personnel and UC Davis Police.

June

1. There was no scheduled training for the month of June.

July

1. All licensed and candidate operators successfully completed the Annual Operators Examination.

2. MNRC conducted summer school classed for the University COSMOS program.

3. One Reactor Operator candidate and two Senior Reactor Operator (Instant) candidates were administered Nuclear Regulatory Commission (NRC) licensing written and oral examinations.

(Note: Both the SRO instants passed the both examinations. The RO candidate passed the oral section of the exam but failed one section of the written exam).

August

1. There was no schedule training in the month of August.

September

1. All licensed operators and trainees attended Fuel and Fuel Handling training.

2. Wesley Frey and Tim Essert became certified Licensed Senior Reactor Operators by the NRC.

October

1. All Licensed Operators and trainees attended Normal, Abnormal and Emergency Procedures training.

November

1. There was no scheduled training for the month of November December

1. There was no scheduled training for the month of December.

UCDAWARCAMWu RpAwt 2014 10

MNRC*

UCD/MNRC ANNUAL REPORT FOR 2014 mOperating Hours 4500 4000 3500 3000 2500 2000 1500 1000 5oo 0

40 4ý Aý 0 All 0 0 0 0 0 00 01 O*le 0, e op, ob 0A 6 A N I-lq -rq Nq sq, -rq -rq -vq -rq -vq -rq lp lip lp 00 lp §ý P P UMMMNRCAn fRPo2014 11

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MMvU1LAN UCD/MNRC ANNUAL REPORT FOR 2014 Unscheduled Reactor Shutdowns 2014 5

0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec lCSC 0 0 0 0 0 0 0 0 0 0 0 0 mOther 0 0 0 0 0 0 0 0 2 0 0 0 o2014 Total 0 0 0 0 0 0 0 0 2 2 2 2 02013 Total 2 2 2 2 2 2 2 2 2 3 4 4 Months UCOMRC AnnmdRqP 2014 12

I ( DAVIS UkattLANW~r<Jftm" IM W!A~Jt UCD/MNRC ANNUAL REPORT FOR 2014 Reactor Hours (2014)

Reactor Hours 2014 160 140 120 0

100 01 80 CL 60 0.

0 x 40 20 0

jan I reD mar Apr MdY Jun Jul mug Sep I Oct rlov I.ec 0 2014 Op-Hrs 61.3 64.67 81.01 71.8 85.92 106.17 149.48 111.9 81.07 95.13 111.3 82.77 m2014 Mw-Hrs 66.46 63.92 80.64 63.89 75.2 99.86 143.34 104.96 77.15 87.37 106.09 63.98 a 2013 Op-Hrs 84.88 80.54 83.1 106.81 97.55 87.29 76.65 91.33 81.97 85.03 80.14 37.58 m2013 Mw-Hrs 78.96 77.06 80.77 99.48 92.09 80.39 67.21 88.27 78.93 79.54 79.56 20.17 UCDMMNC AnnuaW~l Rio2014 13

1.{DAVISA MNWRCI UCD/MNRC ANNUAL REPORT FOR 2014 Reactor Tank Irradiation Facilities 2014 17 16 15 14 I 13 121  :::::A 10 99 E

z 7

6 5

4 3

2

- Jan 0Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec F- -F--

NPneumatic 16 10 0 0 0 2 1 0 3 1 0 0

• Silicon Fixture 3 2 0 0 0 0 0 1 0 0 0 0 i -

0 Central Facility 1 0 0 1 0 0 2 1 0 0 1 1 F-OArgon 0 0 0 0 0 0 0 0 0 0 0 0 8 Neutron Irradiator 0 1 3 8 11 5 0 8 7 6 0 0 Cl Months UCDMi AURCAnMReport 2014 14

MNRC*

WL(DAVIS UCD/MNRC ANNUAL REPORT FOR 2014 Bay Utilization (Shutter Operations)2014 300 250 C

a 4.

L.

200 I

150 I-E z 100 50 l

0 Jan i Feb Mar Apr May Jun Jul Aug n

Sep Oct Nov r

Dec EBay1 92 81 124 81 65 242 134 68 79 198 184 137

• Bay 2 76 45 49 168 43 57 110 51 110 118 126 87 ClBay 3 0 0 1 7 2 3 5 0 4 2 4 0 1 7 0 OBay 4 0 0 2 6 18 16 7 12 3 Months i

UCDAWNRCAnna R*Pr 2014 15

UCOAVS MNRC~e UCD/MNRC ANNUAL REPORT FOR 2014 4; Bay IrradiationRequests Completed 2014 175 ISO 125 125 100 E

z 75 50 25 I I 0 Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul 45 52 99 87 83 EBeyl1 74 66 86 62 41 147 93 16 21 15 34 42 20 39 105 57 44

• Bay 2 42 23 3 0 0 1 4 0 OBay 0 0 1 1 1 0 0 0 3 1 0 1 0 O3ay 4 0 3 5 0 8 0 Months 2014 ODIMNACAnlwdRepor 16

UCDAVIS MNRC*

McCLELLAN NUCLEAR RESEARCH CENTER UCD/MNRC ANNUAL REPORT FOR 2014 8.0 Radioactive Effluents A summary of the nature and amount of radioactive effluents released or discharged to the environment beyond the effective control of the MNRC, as measured at or prior to the point of such release or discharge, include the following:

8.1 Liauid Effluents No liquid effluents were released during 2014.

8.2 Airborne Effluents Airborne radioactivity discharged during 2014 is tabulated in Table 1 below.

TABLE 1 2014

SUMMARY

OF AIRBORNE EFFLUENTS MONTH TOTAL EST.MAX AVG. FRACTION OF EST. DOSE (2) FRACTION OF EST. CONC. OF APPLICABLE FROM Ar-41 APPLICABLE QUAN. Ar-41 IN IOCFR2O Ar-41 FOR IGCFR20 Ar-41 UNRESTRICTED CONC. LIMIT FOR UNRESTRICTED DOSE RELEASED AREA (1)(3) UNRESTRICTED AREA (1) CONSTRAINT AREA (1) FOR UNRESTRICTED AREA (1X4)

(CI) (UCI/ml) (%) (mrem) (%)

JAN 1.70 9.59E-1 1 1.0% 5.84E-01 5.84% NONE NONE FEB 0.83 4.70E-1 1 0.5% 2.86E-01 2.86% NONE NONE MAR 0.76 4.25E-1 1 0.4% 2.59E-01 2.59% NONE NONE APR 0.64 3.59E-11 0.4% 2.19E-01 2.19% NONE NONE MAY 0.66 3.72E-11 0.4% 2.27E-01 2.27% NONE NONE JUN 1.16 6.52E-1 I 0.7% 3.97E-01 3.97% NONE NONE JUL 1.60 9.02E-1 1 0.9% 5.49E-01 5.49% NONE NONE AUG 1.00 5.65E-1 1 0.6% 3.44E-01 3.44% NONE NONE SEP 1.20 6.78E-1 1 0.7% 4.13E-01 4.13% NONE NONE OCT 1.20 6.75E-1 1 0.7% 4.11E-01 4.11% NONE NONE NOV 1.99 1.12E-10 1.1% 6.82E-01 6.82% NONE NONE DEC 1.47 8.30E-1 1 0.8% 5.05E-01 5.05% NONE NONE TOT 14.2 8.01E-10 4.87 NONE NONE AVG 1.18 6.67E-11 0.7% 4.06E-01 4.06%

(1) This location is 240 meters downwind which is the point of maximum expected concentration based on the worst case atmospheric conditions (see MNRC SAR Chapter 11).

(2) Based on continuous occupancy and the calculation techniques used in Appendix A of the MNRC SAR (Ar-41 at 2.3E-10 uCi/ml continuous for one year equals 1.4 mrem).

(3) 10CFR20 Limit for concentration is 1E-8 (Appendix B, Table 2);

(4) Constraint for dose is 10 mrem/year [10CFR20.1101(d)]

UcDWMNRCAn""Report 2014 17

UCDAVIS MNRC*

McCLELLAN NUCLEAR RESEARCH CENTER UCD/MNRC ANNUAL REPORT FOR 2014 8.3 Solid Waste One (1) B-25 box of solid waste was shipped to Thomas Gray & Associates.

Total: 98ft 3 , 54mCi 9.0 Radiation Exposure Radiation exposure received by facility operations personnel, facility users, and visitors during 2014 is summarized in Table 2 below.

TABLE 2 2014

SUMMARY

OF PERSONNEL RADIATION EXPOSURES NUMBER OF AVERAGE GREATEST AVERAGE GREATEST INDIVIDUALS TEDE INDIVIDUAL EXTREMITY EXTREMITY PER TEDE INDIVIDUAL (mrem) (mrem) (mm) (mrem)

FACILITY 1

9 23 79 55 209 PERSONNEL" )

FACILITY 26 .35 3 *

• USERS VISITORS 919 <0.1 2 * *

(1) Only four facility personnel actually received exposure.

• Extremity monitoring was not required.

UMCDIAMRC Annlj Report 2014 18

UCDAVIS MNRC*

McCLELLAN NUCLEAR RESEARCH CENTER UCD/MNRC ANNUAL REPORT FOR 2014 10.0 Radiation Levels and Levels of Contamination Radiation levels and levels of contamination observed during routine surveys performed at the MNRC during 2014 are summarized in Table 3 below.

TABLE 3 2014

SUMMARY

OF RADIATION LEVELS AND CONTAMINATION LEVELS DURING ROUTINE SURVEYS AVERAGE HIGHEST AVERAGE HIGHEST (mrem/hr) (mrem/hr) (dpm/ 1OCM2 ) (dpm/lO=CM 2 )

OFFICE SPACES <0.1 <0.1 <5000(l) <5000(1)

REACTOR CONTROL RM <0.1 <0.1 <5000(l) <5000(1)

RADIOGRAPHY CONTROL RM <0.1 <0.1 <5000(l) <5000(1)

COUNTING LAB <0.1 <0.1 <5000(l) <5000(1)

STAGING AREA <0.1 <0.1 <5000(l) <5000(1)

<5000(l)

COMPOUND <0.1 <0.1 <5000(l)

EQUIPMENT RM 0.2 120 <800(2) <800(2)

DEMINERALIZER AREA 18 350 <800(2) <800(2)

REACTOR RM 2.0 270 <800(2) <800(2)

SILICON STORAGE SHED <0.1 <0. 1 <5000(l) <5000(l)

RADIOGRAPHY BAYS 3.7(3) 600 <800(2) <800(2)

(1) <5000 dpm/100 cm 2 = Less than the lower limit of detection for a scanning survey.

(2) <800 dpm/100 cm2 = Less than the lower limit of detection for a swipe survey.

(3) Due to Bay 1 Storage Areas; all other areas and bays are significantly lower (typically <0.1 mrem/hr).

UCDWl#iACAnMuReport 2014 19

UCDAVIS MNRC*

MCCLELLAN NUCLEAR RESEARCH CENTER UCD/MNRC ANNUAL REPORT FOR 2014 11.0 Environmental Surveys Environmental surveys performed outside of the MNRC during 2014 are summarized in Tables 4 & 5 below. The environmental survey program is described in the MNRC Facility Safety Analysis Report.

TABLE 4 2014

SUMMARY

OF ENVIRONMENTAL TLD RESULTS (WITH NATURAL BACKGROUND(" SUBTRACTED)

AVERAGE HIGHEST (mrem) (mrem)

ON BASE (OFF SITE 1-20 & 64) 5 14 ON SITE (SITES 50 - 61 & 65-71) 13 20 (1) Natural background assumed to be the off base (Sites 27-42) average of 25 mrem.

UCODVARCAnmd Rport 2014 20

UCDAVIS MNRC*

McCLELLAN NUCLEAR RESEARCH CENTER UCD/MNRC ANNUAL REPORT FOR 2014 '/

TABLE 5 2014

SUMMARY

OF RADIOACTIVITY IN WELL WATER UcDVWRC.ARmwdRpoWt 2014 21