ML091760089

2008 Annual Report for University of California Davis/ Mcclellan Nuclear Radiation Center

ML091760089
Person / Time
Site:	University of California-Davis
Issue date:	06/17/2009
From:	Flocchini R Univ of California, McClellan AFB, CA
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
MNRC-0004-DOC-13
Download: ML091760089 (23)

Text

'1 5335 PRICE AVENUE, BUILDING 258 McCLELLAN, CA 95652 MNRC McCLELLAN NUCLEAR RADIATION CE TER PHONE: (916) 614-6200 FAX: (916) 614-6250 WEB: http://mnrc.ucdavis.edu June 17, 2009 United States Nuclear Regulatory Commission Attn: Document Control Desk 1 White Flint North 11555 Rockville Pike Rockville MD 20852 Re: 2008 Annual'Report for University of California Davis/ McClellan Nuclear Radiation Center, Docket No. 50-607, License No. R-130 To Document Control Desk:

Attached is the 2008 annual report for the McClellan Nuclear Radiation Center, submitted in accordance with the reporting requirements of the Technical Specifications document MNRC-0004-DOC-13 paragraph 6.7.1.

Thanks and Regards, Robert G. Flocchini PhD Facility Director McClellan Nuclear Radiation Center Ao2~c

,MNRC MCCLEUAN NUCLEAR RADIAT* CN 2008 ANNUAL REPORT Docket Number 50-607 License Number R-130

MNRC UCD&VOS UCD/MNRC ANNUAL REPORT FOR 2008 McQELIANNUQEARMAD"A1

1. Introduction The University of California, Davis McClellan Nuclear Radiation Center (MNRC) consists of a research reactor and associated radiography and positioning equipment. 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 TRIGATM reactor with pulsing capability.

It is the 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 2008.

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 and four bays for radiography. All four bays are capable of using radiography film techniques, but Bays 1 and 3 will 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/MNRC 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, and reports to the Vice Chancellor for Research.

UCD/MNRC Annual Report 2008 1

UCID&VO5 NRIC mcdiuAm NCuEaR ADO

• u=C=/MNRC ANNUAL REPORT FOR 200 4.0 Facility Modifications (Section 50.59 of 10CFR Part 50), and experiments.

1. Hydrogen Heat Exchanger radiography (explosive and containment) for K-4-2

2. FM-III-08-02 Replace Duct Smoke Detectors

3. FM-I1I-08-03 Replace AC-5 (Bay 4)

4. FM-III-08-04: Re-roof MNRC building complete

5. FM-III-08-05: Install freeze protection insulation on roof fresh water lines 5.0 New Approved Experiments 1 The Experiment Review Board (ERB) convened to determine the feasibility of isotope production of La-139. A trial test with a small amount'of proposed matrix was irradiated in the PTS. The determination of overall activity and components within the matrix indicate no major issues with performing this type of irradiation. Subsequent irradiation checks will be performed if the customer changes matrix type or blend. Experiment authorization K-4-47 is approved.

6.0 Licensing and Regulatory Activities 6.1 NRC Items

a. The Nuclear Regulatory Commission performed two inspections: during the weeks of 22 January and 7 July.

6.2 Nuclear Safety Committee (UCD/NSC)

a. The annual NSC audit of the UCD/MNRC was completed during the month of December.

b. Two NSC meetings were held: 1 August and 5 December at MNRC 7.0 OPERATIONS OPERATING HISTORY:

TOTAL OPERATING HOURS THIS YEAR: 1452.42 TOTAL OPERATING HOURS: 41004.72 TOTAL MEGAWATT HOURS THIS YEAR: 1410.28 TOTAL MEGAWATT HOURS: 56235.80 TOTAL NUMBER OF PULSES PERFORMED THIS YEAR: 0 TOTAL NUMBER OF PULSES PERFORMED: 473 UNSCHEDULED REACTOR SHUTDOWNS and NOTED PROBLEM AREAS:

In 2008, there was one (1) unscheduled shutdown at the MNRC reactor facility. The following is a list of the unscheduled shutdowns:

UCD/MNRCAnnual Report 2008 2

UCDAVWS MNRC*

MN NRCffM M-41D/MNRC ANNUAL REPORT FO0Rý 2007 REACTOR SHUTDOWNS Type of Failures Total.,.

Number CSC 0 Other 1 TOTAL NUMBER OF SHUTDOWNS IN 2008 1 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 1 0 0 0 0 0 Notes 1 Notes:

1:Shim 4 and 3 rod drop.

January

1. There were no unscheduled shutdowns in January.

2. One startup was cancelled on 4 January. Severe winter weather caused several power disruptions during preparations for startup.

3. There were two callbacks to the facility in the month of January, both due to power losses caused by severe winter weather. 1 callback for CSC DIS 64 timeout scram signal, cleared upon acknowledgement.1 callback for UPS fault alert. Alert cleared upon acknowledgement.

4. One ventilation system issue occurred during January. EF-1 (Reactor Room ventilation fan) tripped off during the power shift from emergency generator to normal power following the weekly generator test. The fan was cycled, overloads reset, and retested sat. This will require closer attention from operators.

February

1. There were no unscheduled shutdowns in February

2. One Pre-Start checklist was halted when a fastener fell into the tank from the Shim 3 drive motor mount during scram checks. Investigation showed the fastener (mounting screw) did not fall on top of the core or any other visible horizontal surface. The fastener was replaced, rod operability checks were performed for Shim 3, and all other control rods were cycled for freedom of operation. The Pre-Start checklist was resumed, and normal reactor operations permitted. Fastener was subsequently found on Primary piping external to the tank.

3. One ventilation system issue occurred during February. EF-1 (Reactor Room ventilation fan) tripped following ventilation system cycling as part of the weekly checks. This is the second time intwo months. All electrical checks indicate no obvious problems. This will require closer attention from operators.

March

1. There were no unscheduled shutdowns in March UCD/MNRC Annual Report 2008 3

MNRCIUCDMNRC UCDAVII$

MCQEL1ANNUCLEARRADMMaflNaTR ANNUAL REPORT FOR 2009,

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

a. UPS fault, which cleared upon acknowledgement.

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

2. There was one callback to the facility in the month of April. On 4/2/08: Bay 1 Staging Area Radiation Area Monitor drifted up to the alert setpoint. Radiation levels in the area were checked and verified < 0.1 mR/HR. The detector module was unplugged.

3. Several electronic systems failed during the month.

a. Nuclear Instrument channel NM-1000 lost local display, discovered during the reactor Pre-Startup Checks. The problem was isolated to the A-4 card, which was repaired and reinstalled. Instrument checks were all satisfactory.

b. The Bay Continuous Air Monitor (CAM) experienced random re-boots and alerts/alarms.

The PIOPS CPU card was replaced. The original Bay CAM RAM chipset was transferred to the new card during the replacement. Calibration checks were satisfactory.

c. The Bay 1 and Bay 2 Staging Area Radiation Area Monitors (RAM) failed to pass their calibration checks. The GM tubes in both detectors were replaced and calibrated.

May

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

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

June

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

2. There was one callback to the facility in the month of June. Received a Stack CAM alert and alarm. All conditions were normal; one minute printouts indicate no unusual activities. Alert and alarm cleared upon acknowledgement.

July

1. There was one unscheduled shutdown in July. On July 25, Control Rod Shim 4 dropped from its magnet, causing Shim 3 to drop due to mechanical shock. Investigation showed no irregularities. Control Rod Operability Checks were performed satisfactorily on both control rods. Rod drip times were 0.39 seconds for Shim 3 and 0.4 seconds for Shim 4. Reactor operations were resumed following successful operability checks.

2. There was one callback to the facility in the month of July: UPS fault, Cleared upon acknowledgement Auaust

1. There were no unplanned shutdowns during the month of August.

2. There was one callback to the facility in the month of August. On 6 August, multiple alerts and alarms due to a large area power outage. All conditions returned to normal upon resumption of power..

September

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

UCDIMNRC Annual Report 2008 4

LJCDavis MNRC,4 WM~EAN NUCTMAMDIAMlL11 CrRR ((qD/RC ANNUAL REPORT FoR 2 p October

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

2. There was one callback to the facility in the month of October. A large area power outage resulted in multiple alerts and alarms. All systems were returned to normal following resumption of power.

November

1. There were no unscheduled shutdowns or callbacks during the month of November.

2. On 11/3, the NPP-1000 Nuclear Instrument failed to scram during the Prestart Checks. The set point was 108-110%, and the unit scrammed at 111-112%. The instrument was replaced with a calibrated unit. A calorimetric calibration was performed, and both NI channels were adjusted based upon calorimetric results.

3. On 11/24, the Demineralizer Inlet Conductivity test signal failed to provide an alarm at the Control Console during Prestart Checks. Troubleshooting indicated the transmitter unit voltage to current converter circuit card was malfunctioning. The card was replaced and all checks were performed satisfactorily.

December

1. There was no unscheduled shutdown in December.

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

a: On 12/6 a Scram Fault message was received and required reboot of the CSC and DAC computers to clear.

UCD/MNRC Annual Report2008 5

MNRC UCDAVUS mcaEuAN NUCLar RADL~oN cD/MNRC ANNUAL REPORT FOR 2008

7.2 ANOMALIES

During 2008, there was 1 reported anomaly at the MNRC facility. The specifics are listed below October Anomaly Report 10/10/08 - 1030 hrs Reactor Shutdown for Annual Maintenance Noted during visual inspection of the top of the reactor core at the end of shift 10/09/08 - 1600 hrs.

Unusual marking or wear pattern on upper grid plate between position F8 (IFE 10848) and E8 (20/20 element 11330).

We have verified with the underwater camera that IFE 10848 appears to have worn a groove in the narrow section of the upper grid plate between positions E8 and F8.

Each affected fuel elementlIFE has been removed through the upper grid plate with no problems. The serial number on element 11330 has been verified and it passed the straightness gage check and was visually inspected satisfactorily with the underwater camera. IFE 10848 was also visually inspected satisfactorily. No unusual markings or indications noted on either element.

ACTIONS TO CORRECT THIS ANOMALY Both elements have been returned to their respective in core positions. The tri-flutes of these elements have been positioned to be approximately 60 degrees from the wear location. Additionally, the second IFE (element 10661 in J-05) is beginning to form a groove in its location towards 1-06. Element 10661 has also been rotated such that its tri-flutes are away from the wear location.

LONG TERM CORRECTIVE ACTIONS.

Based on images taken of the wear area, it does not appear that breakthrough from F8 to E8 has occurred. Senior Reactor Operators will verify that the IFE tri-flutes have not rotated back into the wear locations. We will continue to monitor both the wear locations and the IFE positions. Short of replacing the upper grid plate, there is no reasonable repair that can be made in this situation. The obvious root cause to this problem is the vibration seen in the IFE stainless steel tubing induced by the primary and diffuser flow patterns, and the nucleate boiling in-core at higher reactor power levels.

General Atomics and the TRTR community have been appraised of this occurrence and are evaluated other possible causes.

Operations personnel will evaluate reducing primary and diffuser system flows to attempt to reduce flow induced vibrations observed in instrument tubing and connecting rods.

See attached photograph of the upper grid plate. The wear point is in the lower left section.

UCD/MNRC Annual Report 2008 6

UCDAVIIS MNRC*

MCOLANNCLEUMf tADlA11MMLCENitE .. -MNRC ANNUAL REPORT FO200C 91 7.3 MAINTENANCE OTHER THAN PREVENTIVE:

January

1. Installed Li-Poly /Cadmium mask on the cover plate of Bay 3 Radiography Beam Tube.

2. The building alarm system automated test signal programming was reset and tested.

3. Investigated loss of EF-1. No electrical problems were found. Reset controller and performed 5620-Al as an op check/retest, sat.

February

1. Reassembled the Shim 3 foot switch assembly which had separated from the follower.

Ops checks sat, rod drop time 0.39 seconds.

2. Replaced one drive belt on EF-3 (Pneumatic Transfer System ventilation) blower.

3. Reinstalled missing drive motor mounting fastener on Shim 3 Control Rod. Operability checks sat, rod drop time 0.40 sec..

4. Replaced expended helium supply bottle 5 Changed out the two expended inlet resin bottles on the Make Up Water Tank. Outlet conductivity < 2 micro-mhos/cm March

1. Replaced Pneumatic Transfer System Ventilation HEPA pre-filter due to high differential pressure.

2. Replaced "Normal Path" Reactor Room Ventilation HEPA filter due to high differential pressure. DOP tested sat..

3. Replaced failing condenser fan and run capacitor on AC-7 (Bay 2 Ventilation)

ARi

1. Replaced failed GM tubes in several Radiation Area Monitors, found during calibration.

2. Replaced PIOPS CPU card using the same RAM chip to correct intermittent alarms and random re-boots in the Bay CAM

3. Replaced drive belt and leveled the blower bedplate on EF-2 (Bay Ventilation) blower.

UCD/MNRC Annual Report22008 "7

UCMU&\VS MNRC*M, MktQEUANRCffM RC IA ANNUAL REPORT FOR 2008

4. Replaced expended Helium supply bottle..

5. Replaced safety edge hose on the Bay 2 Staging Area rollup door. Door safety checks sat.

6. Cut away damaged supply tubing for the Bay 1 insert Helium supply line. Installed new Swagelok fittings, all connections soap tested sat

7. Replaced the A-4 card in the NM-1000 Nuclear Instrument. Verified proper indications on the micro terminal, verified all constants sat. Prestart checks sat, indications normal on startup May

1. Replaced lamps in the REACTOR ON fixture in the Reactor Operators office

2. Replaced inner belt on EF-3 (Pneumatic Transfer System Ventilation) blower

3. Replaced Pre-Filter due to high differential pressure and reconnected sensing lines on EF-3 HEPA Pre-Filter

4. Replaced failed South Reactor Tank Light fixture due to corrosion.

5. Replaced AC-5 (Bay 4) per FM-111-08-3

6. Replaced depleted Helium supply bottle).

June

1. Replaced both drive belts on EF-1 (Reactor Room Ventilation)..

2. Replaced failed condenser fan motor and run capacitor on AC-1 (Reactor Room).

3. Replaced failed condenser fan motor and run capacitor on AC-6 (Bay 3).

4. Replaced K3 and K4 relays in the Fuel Temp 2 test circuit due to high ramp rate during testing. Replaced relays exhibited high resistance contacts

5. Replaced battery on Reactor Room CAM ROM card, reset all settings.

July

1. Replaced failed DAC computer monitor

2. Repaired excessively leaking sump seams in the Secondary Cooling Tower.

3. Replaced blown fuses and blown condenser fan motor run capacitor in AC-6 (Bay 4).

4. Replaced expended beam tube helium supply bottle

5. Replaced failed GM tube in detector for the Demineralizer Area RAM. Recalibrated detector satisfactorily August

1. Replaced drive belts on EF-3 (Pneumatic Transfer System Ventilation) blower.

2. Replaced frozen condenser fan motor on AC-1 (Reactor Room).

3. Replaced failed feed and bleed totalizer on the Secondary System chemical addition system.

September I. Troubleshot rod bottom indication failure on control rod Shim #1. Adjusted the rod bottom limit switch. Op checks sat, scram time 0.40 seconds

2. Replaced failed condenser fan motor and run capacitor on AC-1 3 (East Annex).

3. Replaced weather damaged sensing line for the Ventilation Flow Proof switch on EF-1 (Reactor Room Ventilation) blower.

October

1. MNRC completed the annual reactor maintenance shutdown during the month of October. The shutdown commenced 10/6/2008 and completed on 10/15/2008.

Technical Specification required periodic maintenance as well as general maintenance was performed. During maintenance an unexpected wear area was noted on the core top grid plate. An Anomaly Report was generated. Included in the maintenance are the following reactor related items:

UCD/MNRC Annual Report2008 8

UCD&VII MNRZC Ic/M ANNUAL REPORT FOR* 209g

a. Annual fuel inspections were performed satisfactorily. No abnormalities were found.

c. Annual Control Rod and Annual Transient Rod inspections were performed.

d. Control Rod Operability checks, Indication Linearity checks, and Scram Times were checked. No problems were found. Measured scram times are as follows Transient Rod: 0.37 seconds Shim 3: 0.39 seconds Shim 1: 0.39 seconds Shim 4: 0.40 seconds Shim 2: 0.37 seconds Regulating Rod: 0.39 seconds

e. Rod Calibration measurements were performed with the following results Transient Rod: $2.17 Shim 3: $2.33 Shim 1: $2.52 Shim 4: $2.57 Shim 2: $2.21 Regulating Rod: $2.48

f. The Shutdown Margin was calculated at $6.64.

g. A Reactor Power Calorimetric was performed following the calibration and change-out of the NPP-1000.

h. At Power scram testing of both nuclear instrument channels was sat. The NM-1000 channel scrammed at 104%, and the NPP-1000 scrammed at 109%.

Emergency Core Cooling System (ECCS) flow verifications were performed satisfactorily and in specification at both the in-tank nozzle (23GPM) and at the ECCS supply header (24.6 GPM).

2. Replaced the blower contacts in AC-4 (Bay 1)..

3. Replaced all Bay Ventilation blower drive belts

4. Replaced one HV-2 (Staging Area 2) blower pillow block bearing.

5. Replaced all HV and AC blower drive belts (Building Ventilation).

November

1. Replaced NPP-1000 with calibrated unit due to prestart test failure on High Power scram setting.

2. Replaced both drive belts on EF-3 (Pneumatic Transfer System Ventilation.

3. Replaced failed voltage to current converter in the Demineralizer Inlet conductivity module.

4. Replaced defective master key lock switch on the Bay 2 Access Control key box with new.

December

1. The facility's new roof installation is complete and inspected satisfactory

2. Insulated the roof and external fresh water lines with 1 inch fiberglass and canned aluminum for weather/freeze protection 7.4 Training January

1. Operations, Radiography, and Research personnel attended one session of Nuclear Physics/Reactor Theory training.

February

1. Senior Reactor Operators attended Utilization Document training.

2. Senior Reactor Operators attended Normal, Abnormal, and Emergency Procedures training.

UCD/MNRC Annual Report 2008 9

UCIM$ns MNRC*

McQELLANNUCLEAR RALO CENTR UCD/MNRC ANNUAL REPORT FOR 2E_

March

1. Senior Reactor Operators attended Facilities Design and Operating Characteristics training.

2. Senior Reactor Operators attended Administrative Controls, Procedures, and Regulations training.

3. 5 Senior Reactor Operators (all) successfully completed the biennial SRO requalification exam.

1. Senior Reactor Operators attended Radiation Safety Procedures revision training.

2. All MNRC personnel attended the Annual Alara, Safety, and Security training May

1. There was no scheduled training held in the month of May June

1. All licensed operators (5 SROs) successfully completed the Annual Operators Exam.

July

1. There was no scheduled training held in the month of July August

1. There was no scheduled training held in the month of August.

September

1. All operations personnel attended training on Fuel

2. Two Senior Reactor Operators (Reactor Supervisor and Facility Manager) attended the annual TRTR conference in Cape Cod, Massachusetts..

October

1. All operations personnel attended training on Fuel Movement prior to fuel inspections.

November

1. There was no scheduled training held in the month of November.

December

1. All Operations personnel attended Emergency Drill training.

2. All Operations personnel attended Normal, Abnormal, and Emergency Procedures training.

3. All facility personnel participated in a Security Drill. (Part 1)

4. RSO and the RS participated in the Annual Emergency drill with the UCDavis Medical Center (Part 2).

UCDAMNRC Annual Report 2008

MNRtC~

MIEUAN MN M ,Al m UCD/MNRC ANNUAL REPORT FOR 2008 UCD/MNRC OperatingHistory

[]Operating Hours 4500 4000 3500 3000 2500 2000 1500 1000 500 0

b' b q~ 0 1. :15bo 0 '1ý00 UCDWVNRC Annual Report 2008 11

LJC DAVIS MNRC~j MCCOEUAN~QM"R~ UCD/MNRC ANNUAL REPORT FOR 2008

-- Total Op-Hrs - Total MW-hrs

---

.ý Linear (2007 Op-Hrs) --- - - Linear (2007 MW-Hrs) 2000 1800 1600 1400 1200 0 1000 x

800 600 400 200 0-C m0 L. 1. >. oI C, u

4) CL 'z 0. 0 a IA 0 z Reactor Hours (2008)

UCDIMNRC Annual Report 2008 12

LCDAVIS MNRLC UCD/MNRC ANNUAL REPORT FOR 2008 Unscheduled Shutdowns--

Total 2008 4.5 4

3.5 3

2.5 2-1.5 1

0.5 0 a

.0 L a.. >C" 0k.>

Eu 41 0.

CL m. 441 0 p.' U. z z mlU) 0 z UCDOIMNRC Annual Report2008 13

t( DAVIS MNKLLjNUCD/MNRC ANNUAL REPORT FOR 2008 Reactor Tank IrradiationFacilities Total Number of IrradiationsCompleted (2008)

-- Pneumatic - Silicon Fixture Central Facility --- Argon

• Neutron Irradiator -- 9-2008 Total ---- 2007TotalI JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC UCDWINRCAnnual Report 2008 14

LF( DAVIS MNRCIý W4CLEUAN NMAL LAWO UCD/MNRC ANNUAL REPORT FOR 2008 Bay IrradiationsCompleted (2008) ay 1 - Bay 2 x-Bay 6 3 Bay 4 -+--- 2008 Total Linear (2007 Total) 500 450 400

• 350 c

0

.2 300 "a-

"250 0

.200 E

z 150 2007 Total 100 50 0

0 L- CL c 0 4w U

'U 0 4' A-t UL z 0. MU U) z 0 UCDIPMNRC Annual Report 2008 15

1 C DAVIS MNRtC" W4IUNNC AL UCD/MNRC ANNUAL REPORT FOR 2008 Bay Utilization (Shutter Operations)2008

A 250U 240-23 22 210

, 20 --

19

.9 18

• "17

.T 160-

"C 150 m 140 ...

i 130 120 110

~-10 0-a9

.a 800 E 7

" 60-01 - -1 z5 0 4

3 2

1 U

]an Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec EBay 124 83 41 25 18 103 84 64 176 160 235 153 I Bay 2 168 110 81 22 65 123 224 115 157 115 198 174 OBay 3 6 7 4 3 20 0 1 4 0 0 1 0 O0Bay 4 5 140 119 45 7 0 1 4 0 0 0 11 Months UCDVINRC Annual Report 2008 16

UCDAVIS MNRC-brý MCCLELL6J NUCLEAR RADLAIION CNE IUCD/MNRC ANNUAL REPORT FOR 200#

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 Liquid Effluents Liquid effluents released during 2008 are summarized on a monthly basis in Table 1 below.

TABLE I 2008

SUMMARY

OF LIQUID EFFLUENTS TOTAL ACT. DETECTABLE SPECIFIC TOTAL ACT. OF AVG. CONC. FRACTION TOTAL VOL.

RELEASED RADIO- ACT. OF EACH DETECT- OF RAD. OF 10CFR20 OF MONTH NUCLIDE(S) EACH ABLE RADIO- MATL. AT LIMIT EFFLUENT DETECT- NUCLIDE POINT OF WATER ABLE RELEASE (INCLUDING RADIO- DILUENT)

NUCLIDE RELEASED

-A~i)_ ______ aCiLrni)________ ________(gaiL JAN 0 NONE FEB 0 NONE MAR 0 NONE APR 0 NONE MAY 0 NONE JUN 0 NONE JUL 0 NONE AUG 0 NONE SEP 0 NONE OCT 0 NONE NOV 0 NONE DEC 0 NONE UCDIMNRC Annual Report 2008 17

LJCDAVIS MNRZC NUX:1EARADLAQlO WM~CLAN 1

7*CD/MNRC ANNUAL REPORT FOR 2008] (a 8.2 Airborne Effluents Airborne radioactivity discharged during 2008 is tabulated in Table 2 below.

TABLE 2 2008

SUMMARY

OF AIRBORNE EFFLUENTS MONTH TOTAL EST.MAX AVG. FRACTION OF EST. DOSE (2) FRACTION OF TOT. EST. AVERAGE EST. CONC. OF Applicable FROM Ar-41 APPLICABLE QUANTITY CONC. OF QUAN. Ar-41 IN 10CFR20 Ar-41 FOR 10CFR20 OF ACT. PART. ACT.

Ar-41 UNRESTRICTED CONC. LIMIT FOR UNRESTRICTED DOSE LIMIT IN RELEASED RELEASED AREA (1) UNRESTRICTED AREA (1) FOR PART. WITH AREA (1) UNRESTRICTED FORM HALF-LIFE AREA (1) WITH > 8 DAYS HALF-LIFE

>8 DAYS (Ci) (uCi/ml) (0/a) (mrem) (0/a) (Ci) (uCi/ml)

JAN 2.19 1.32E-10 1.3% 8.04E-01 8.04% -NONE NONE FEB 1.51 9.12E-11 0.9% 5.55E-01 5.55% NONE NONE MAR 1.26 7.63E-1 1 0.8% 4.64E-01 4.64% NONE NONE APR 1.51 9.14E-1 1 0.9% 5.56E-01 5.56% NONE NONE MAY 1.57 9.51 E-11 1.0% 5.79E-01 5.79% NONE NONE JUN 1.78 1.06E-10 1.1% 6.45E-01 6.45% NONE NONE JUL 2.88 1.72E-10 1.7% 1.05E+00 10.47% NONE NONE AUG 1.82 1.09E-10 1.1% 6.62E-01 6.62% NONE NONE SEP 2.72 1.62 E-10 1.6% 9.87E-01 9.87% NONE NONE OCT 1.6 9.55E-1 1 1.0% 5.82E-01 5.82% NONE NONE NOV 2.67 1.59E-10 1.6% 9.70E-01 9.70% NONE NONE DEC 2.13 1.27E-10 1.3% 7.75E-01 7.75% NONE NONE TOT 23.65 1.42E-09 - 8.63 - NONE NONE AVG 1.97 1.18E-10 1.2% 7.19E-01 7.19 (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/mi continuous for one year equals 1.4 mrem).

Annual Report 2008 UCDWMNRC 18

UCDAVIS MNRCII4CI W=ELLANNUCLEAR RADLQM RANNUAL REPORT FOR 2008] 0 8.3 Solid Waste No waste shipments were made in 2008 TABLE 3 2008

SUMMARY

OF SOLID WASTE TOTAL VOL. TOTAL DATE OF  :

ACTIVITY SHIPMENT (cu. ft.) (mNi A 0 0 N/A N/A 9.0 Radiation Exposure Radiation exposure received by facility operations personnel, facility users, and visitors during 2008 is summarized in Table 4 below.

TABLE 4 2008

SUMMARY

OF PERSONNEL RADIATION EXPOSURES NUMBER OF AVERAGE GREATEST AVERAGE GREATEST INDIVIDUALS TEDE INDIVIDUAL EXTREMITY EXTREMITY PER TEDE INDIVIDUAL

-. (mnirerm) -- -- (mrem)_

FACILITY 12 37 140 89 323 PERSONNEL FACILITY 3 .5 11 USERS *k VISITORS 934 .72 2 (242')

• Extremity monitoring was not required.

1 = Total number that were monitored for exposure UCDVWNRC Annual Report 2008 19

UCDAVItIUCDIMNRC ANNUAL REPORT FOR 200 10.0 Radiation Levels and Levels of Contamination Radiation levels and levels of contamination observed during routine surveys performed at the MNRC during 2008 are summarized in Table 5 below.

TABLE 5 2008

SUMMARY

OF RADIATION LEVELS AND CONTAMINATION LEVELS DURING ROUTINE SURVEYS AVERAGE HIGHEST AVERAGE HIGHEST (mrem/hr) (mrem/hr) (dpm/100cm 2 ) (dpm/100cm 2 )

OFFICE SPACES <0.1 <0.1 <800(1) <800(l)

REACTOR CONTROL RM <0.1 <0.1 <800(l) <800(l)

RADIOGRAPHY CONTROL RM <0.1 <0.1 <800(l) <800()'

COUNTING LAB <0.1 <0.1 <800(l) <800"1)

STAGING AREA <0.1 <0.1 <800(1) <800(l)

COMPOUND <0.1 <0.1 <800(1) <800(l)

EQUIPMENT RM 2.1 4 <800(1) <800(1)

DEMINERALIZER AREA 16 32 <800(1) <800(1)

REACTOR RM 3 8 <800(l) <800(1)

SILICON STORAGE SHED <0.1 <0.1. < 8 00(l) <800(1)

RADIOGRAPHY BAYS *2.0 *1500 <800(1) <800(1)

(1) <800 dpm/100 cm 2 = Less than the lower limit of detection for a swipe survey.

• Due to Bay 1 Storage Areas; most other areas and other bays are significantly lower UCDWMNRC Annual Report 2008 20

UCDAVIS MNRC*

McCQELLMNUCLEAR RADOIAON CNE DIMNRC

-- ANNUAL REPORT FOR 200_(

11.0 Environmental Surveys Environmental surveys performed outside of the MNRC during 2008 are summarized in Tables 6-9 below. The environmental survey program is described in the MNRC Facility Safety Analysis Report.

TABLE 6 2008

SUMMARY

OF ENVIRONMENTAL TLD RESULTS (WITH NATURAL BACKGROUND" 1 ) SUBTRACTED)

AVERAGE HIGHEST (mrem) (mrem)

ON BASE (OFF SITE 1-20 & 64) 5 25 ON SITE (SITES 50 - 62 & 65-71) 9 22 (1) Natural background assumed to be the off base (Sites 27-42) average of 31mrem.

TABLE 7 2008

SUMMARY

OF RADIOACTIVITY IN WELL WATER ALPHA BETA TRITIUM Cs-137 AVERAGE <MDA 2.47E+00 <MDA <MDA HIGHEST 3.51E+00 MDA is the minimum detectable activity at the 95% confidence level.

The MDA range for the analyzed radionuclides (pCi/L).

MIN MAX Alpha 2.21E-01 1.64E+00 Beta 2.6E+00 2.94E+00 Tritium 2.16E+01 3.08E+02 Cs-137 1.54E+00 7.48E+00 UCDIMNRC Annual Report 2008 21