ML12178A445
| ML12178A445 | |
| Person / Time | |
|---|---|
| Site: | University of California-Davis |
| Issue date: | 06/25/2012 |
| From: | Klein B Univ of California, McClellan AFB, CA |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| Download: ML12178A445 (22) | |
Text
5335 PRICE AVENUE, BUILDING 258 McCLELLAN, CA 95652 PHONE: (916) 614-6200 FAX: (916) 614-6250
(.CLLNDAVIS MNRC WEB: http://mnrc.ucdavis.edu SACRAMENTO, CA 95652 PHONE: (916) 614-6200 McCLELLAN NUCLEAR RESEARCH CE [ER FAX: (916) 614-6250 June 25, 2012 United States Nuclear Regulatory Commission Attn: Document Control Desk US Nuclear Regulatory Commission Washington, D.C. 20555-001 Re: 2011 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 2011 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, Dr. Barry M. Klein, Director, McClellan Nuclear Research Center
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DAVCIS MNRC@
2011 ANNUAL REPORT Docket Number 50-607 License Number R-130
.ICMM.. UCD/MNRC ANNUAL REPORT FOR 2011 (
- 1. Introduction The University of California, Davis McClellan Nuclear Research 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 TRIGAt m 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 2011.
- 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.
4.0 Facility Modifications (Section 50.59 of 10CFR Part 50), and experiments.
- 1. None 5.0 New Approved Experiments
- 1. K-4-49 Irradiation of natural Xe gas to produce low activity Xe-133
- 2. K-4-50 Irradiation of lubricant-coated aluminum coupons UCD/MNRCAnnual Report 2011 1
I. CDiIS NAM"NRC tV: UCD/MNRC ANNUAL REPORT FOR 2011 6.0 Licensing and Regulatory Activities 6.1 NRC Items
- a. The Nuclear Regulatory Commission (NRC) completed two inspections during the weeks of 28 February and 18 July.
6.2 Nuclear Safety Committee (UCD/NSC)
- a. The Nuclear Safety Committee performed three audits: Security (11/14/2012), Radiation Safety (11/18/2012), and the Chairman's audit (12/9/2012)
- b. Two NSC meetings were held: The NSC conducted their semi-annual meeting 29 July and 20 December at MNRC 7.0 OPERATIONS OPERATING HISTORY:
TOTAL OPERATING HOURS THIS YEAR: 1385.47 TOTAL OPERATING HOURS: 45080.54 TOTAL MEGAWATT HOURS THIS YEAR: 1305.29 TOTAL MEGAWATT HOURS: 60108.10 TOTAL NUMBER OF PULSES PERFORMED THIS YEAR: 0 TOTAL NUMBER OF PULSES PERFORMED: 473 7.1 UNSCHEDULED REACTOR SHUTDOWNS and NOTED PROBLEM AREAS:
In 2011, there were four (4) unscheduled shutdowns at the MNRC reactor facility. The following is a list of the unscheduled shutdowns:
2011 REACTOR SHUTDOWNS csc TOTAL NUMBER OF SHUTDOWNS IN 2011 4 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec CSC 0 0 0 1 0 0 0 0 0 0 0 0 Other 0 0 1 0 0 0 2 0 0 0 0 01 Notes 1 2 3,4 Notes:
1: Secondary Cooling System pump failure 2: Net fault.
3: Bay Door/Shutter interlock actuation 4: Failure of Pneumatic Transfer System.
UCDaMNRCAnnual Report 2011 2
IUCDAIS *1 WMELLAN"L"" ItNAM"WUCD/MNRC ANNUAL REPORT FOR 2011 January
- 1. There were no unscheduled shutdowns in the month of January.
- 2. There were two callbacks to the facility in January
- a. Rod Withdrawal Prohibit (RWP) alert. The alert cleared upon acknowledgement.
- b. Stack Continuous Air Monitor (CAM) alert, cleared on acknowledgement.
February
- 1. There were no unscheduled shutdowns in the month of February.
- 2. There were two callbacks to the facility in the month of February.
- a. Two (2) Rod Withdrawal Prohibit (RWP) alerts. The alerts cleared upon acknowledgement.
March
- 1. There was one unscheduled shutdown in the month of March
- a. Loss of secondary flow during reactor startup to 50 watts. Found and repaired a damaged motor connection wire on the secondary pump motor.
- 2. There were two callbacks to the facility in March.
- a. Rod Withdrawal Prohibit (RWP) alert. The alert cleared upon acknowledgement.
- b. UPS fault and Fire Alarm Panel alarm, cleared upon acknowledgement and reset. Probable cause: temporary loss of facility power.
April
- 1. There was one unscheduled shutdown in the month of April.
- 2. There were no callbacks to the facility in the month of April.
- 3. The Reactor Prestart failed twice during an attempt to perform for operations. The DAC and CSC computers were rebooted, and the subsequent Pre-Start passed successfully
- 1. There were no unscheduled shutdowns in the month of May.
- 2. There were five (5) callbacks to the facility in the month of May.
- a. There were four (4) callbacks for Rod Withdrawal Prohibit (RWP) alerts. All cleared upon acknowledgement.
- b. There was one (1) UPS fault, cleared upon acknowledgement.
June
- 1. There one (1) callback to the facility in June.
- a. Facility security trouble signal that did not affect Security alarms, resolved by the system contractor.
July
- 1. There were two unscheduled shutdowns in July.
- a. On 29 July, the reactor scrammed due to the Bay 4 door and shutter interlock. One limit switch did not actuate when the Bay 4 door was closed. Investigation showed that the door was not shut completely to actuate all 3 limit switches. Scram and interlock checks per 5420-M4 were performed to verify satisfactory operation of the interlock system. Operators were cautioned to insure the door was completely closed prior to releasing the door operating button.
UCDMNRC Annul Repot 201 3
UCD/MNRC ANNUAL REPORT FOR 2011
- b. The reactor was manually shutdown due to a failure of the Pneumatic Transfer System to function properly. See anomaly report.
- 2. There were three (3) callbacks to the facility in July.
- a. Multiple alerts and alarms associated with a power loss to the facility. All alerts/alarms cleared upon acknowledgement.
- b. Stack CAM alarm, spurious.
- c. Rod Withdrawal Prohibit alert, cleared upon acknowledgement
- 1. There were no unplanned shutdowns during the month of August.
- 2. There was one callback to the facility in the month of August.
- a. Spurious Security System alarm, no apparent cause found.
Inspection of the facility showed no issues. Alarm reset September
- 1. There were no unscheduled shutdowns in the month of September.
- 2. There were no callbacks to the facility in the month of September.
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. CSC computer failure. See anomaly report.
November
- 1. There were no unscheduled shutdowns in November
- 2. There were three callbacks to the facility in November
- a. Two (2) Rod Withdrawal Prohibit alerts. Alert cleared on acknowledgement.
- b. Security system fault, determined to be spurious.
December
- 1. There were no unscheduled shutdowns in December.
- 2. There were three (3) callbacks to the facility in December.
- a. One (1) Rod Withdrawal Prohibit alert. Alert cleared on acknowledgement.
- b. Security system fault, determined to be spurious due to "phone glitch" according to the alarm company.
- c. Fire alarm system dialer alarm. Conditions were satisfactory in the facility. The alarm company reports a communications timer check failure, with the alarm sections performing satisfactory.
NOTE: this alarm occurred again during operations a week later.
Subsequent actions (January) included the alarm company shifting from cell backup to a landline backup. The problem was endemic throughout the company's customer base that use cell backup communications, due to a configuration change by the phone company. No further problems noted since shifting to a land line communications link.
- 3. The NM-1000 nuclear instrument is continuing to periodically show erratic indications at the bottom of the indicating range when the reactor is shut down. Low level readings occasionally fail to drop off as expected when the neutron source is removed from the core during prestart checks. Cycling the instrument power resolves the issue, with no failures following power cycling and rebooting the CSC and DAC computers. Troubleshooting is ongoing. No instrument UCDMNRC Annual RepWor2011 4
MVANLRC* -Ww, UCD/MNRC ANNUAL REPORT FOR 2011 failure or component failure can be found at this time. In the region of operation where the problem is noted, the signal is in the micro amp range. The probable cause is signal noise generated somewhere within the system components, with the source of the noise still under investigation.
7.2 ANOMALIES
During 2011, there were 2 reported anomalies at the MNRC facility. The specifics are listed below July There was one anomaly report issued during the month of July. Report is as follows:
13 July 2011-1329 hrs Reactor operating at 1 Mw.
Anomaly Report Failure of Rabbit to return to PTS hood (receiver)
Actions during anomaly During the performance of experiment 11-2961 a Pneumatic Transfer System (PTS) run, the experiment did not return to the receiver automatically at the end of the run.
Experiment IR 11-2961 was sent into the core via the PTS system for 2 minutes at 1327 hrs.
The blower motor, spool valve, and controller all appeared to operate normally.
At 1329 hrs the PTS controller timed out and the spool valve shifted, but the experiment (i.e. rnbit) did not return to the receiver.
The reactor was directed to be shut down and attempts were made to recover the rabbit via manually operating the PTS controls. After several manual attempts the rabbit returned to the receiver. It took 11 minutesto recover the rabbit.
No obvious cause for the failure to return was noted.
Corrective actions The PTS system will be thoroughly inspected. The blower motor, filter, receiver assembly and transport tubing will be checked to determine if any fault concition exists.
Prior to the next use of the PTS system, the system will be operationally testing several times utilizing rabbits of different masses to see if the failure can be repeated.
Follow up comments regarding the PTS system performance. The entire system was checked over and operationally tested with several different masses of rabbits. No failures were noted during these checks. Subsequent PTS operations have not resulted in a similar failure to date.
UCD/MNRC Annual Report2011 5
MNRC*
104ULA 10.4W. "MUCD/INRC ANNUAL REPORT FOR 2011 October There was one anomaly report issued during the month of October, as follows:
Anomaly Report For: Failure of the Control System Console (CSC) computer Time: 270CT2011 at 0325 Reactor conditions prior to the anomaly and what occurred during the anomaly:
The reactor was shutdown the previous afternoon. At 0325, the Law Enforcement Desk dispatcher received a Reactor Console alert, and notified a Senior Reactor Operator on the recall list.
Upon entry into the Reactor Control Room, it was noted that the CSC Hi Resolution monitor was blank, and the Status Monitor display was locked up, indicating the time as 0325.
By 0630, troubleshooting and rebooting the computer multiple times showed that the CSC computer was inoperable due to a failed CPU card.
What actions were taken to correct this anomaly?
The Reactor Supervisor contacted General Atomics, University of Texas at Austin, and the United States Geological Service (USGS) for information regarding their computer configurations, and to see ifthere were any spare CPU cards readily available. General Atomics was contracted to provide a computer tech/programmer to assist in the troubleshooting and repair. USGS sent two computers (DAC and CSC) from their facility that had been removed during their recent console upgrade.
The CPU card was tested and found to have completely failed. Areplacement CPU card and Ethernet card were ordered and installed in the computer. Some editing of the CSC program was required to address the new Ethernet card. Editing was performed by the General Atomics programmer.
An extensive series of system retests including multiple prestart checks and parametric verifications, all satisfactory, resulted in the Reactor Supervisor releasing the reactor for return to full operation on 02NOV2011.
What corrective actions are needed to prevent this anomaly from reoccurring?
Component failure cannot be prevented. However, MNRC staff will obtain additional CPU and Ethernet cards for on hand spares. The Electronics Engineer has been tasked to configure the USGS computers to MNRC specs, and ghost the existing hard drives for installation in the spare computers. Any future occurrence of this type of problem will be managed by a computer swap out of both CSC and DAC computers to allow return to operation with minimum operational impact.
7.3 MAINTENANCE OTHER THAN PREVENTIVE:
January
- 1. There was no maintenance other than preventive performed in the month of January.
February
- 1. Adjusted Shim 1 control rod zero position. Operability checks satisfactory, rod drop time 0.39 seconds March
- 1. Repaired a broken/burned wire connector on the Secondary Cooling System pump motor and replaced a blown fuse in the controller.
Checked connector tightness on the other power/phase connectors on pump SAT.
UCD!MNRC Annual Report 2011 6
"tCLU.M Ri..W WUM"OUCD/MNRC ANNUAL REPORT FOR 2011
- 2. Replaced expended Helium system supply bottle April
- 1. There was no maintenance other than preventive performed in the month of April.
- 1. There was no maintenance other than preventive performed in the month of May.
June
- 1. There was no maintenance other than preventive performed in the month of June.
July
- 1. Replaced all 50 12 volt batteries in the UPS
- 2. Lifted unit, replaced curb under unit, installed flex joints and vent ducting, replaced gas line, reconnected AC-2 (Equipment Room ventilation).
- 3. Replaced security system fluorescent fixture on stack.
- 4. Replaced failed AC-7 (Bay 2 ventilation) compressor and recharged the system with refrigerant.
S. Installed new curb and new gas pack air conditioning unit for AC-8 (Bay 4 Radiography Control Room and Darkroom ventilation), installed new gas and condensate lines.
- 6. Replaced the Reactor Room Continuous Air Monitor (CAM) pump motor switch and pump motor.
August
- 1. Repaired failed insulation on 24v control wiring for AC-4 (Bay 1 ventilation), correcting ground issue that prevented operation.
- 2. Changed out Helium System supply bottle.
September
- 1. There was no maintenance other than preventive performed in the month of September October
- 1. There was no maintenance other than preventive completed in the month of October.
November
- 1. Changed out Helium System supply bottle.
- 2. Replaced the CSC computer CPU and added an additional Ethernet card.
General Atomics updated the software to the new card configuration.
Retests SAT
- 3. Replaced the failed check source solenoid on the Reactor CAM Noble Gas channel December
- 1. 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: $1.85 Shim 1: $2.63 Shim 2: $2.65 Shim 3: $2.85 Shim 4: $3.09 Regulating Rod: $2.90 UDMNRC Annual Report 2011 7
v.*LLUU,* *nviw UCD/MNRC ANNUAL REPORT FOR 2011 (I
Control Rod Scram Drop Times:
Transient Rod: 0.37 Shim 1: 0.40 Shim 2: 0.37 sec sec sec Shim 3: 0.41 sec Shim 4: 0.39 Regulating Rod: 0.39 sec sec Shutdown Margin: $5.08 At Power Scram values: NPP-1000: 103% indicated, NM-1000: 104%
indicated.
- 3. A nuclear instrument calorimetric calibration was performed. Both the NPP channel and the NM-10000 channel of Nuclear Instruments were adjusted based on results
- 4. Replaced the two north Demineralizer System expended resin bottles.
7.4 Training Januar
- 1. One licensed operator received Facility Design and Operating Characteristics training.
Februa
- 1. Four licensed operators received Facility Design and Operating Characteristics training.
- 2. All licensed operators received Facility Instrumentation and Control training.
March
- 1. There was no scheduled training held in the month of March.
April
- 1. All facility personnel attended the annual ALARA and Security training.
may
- 1. RSO completed Advanced Radioactive Material Shipper Certification Training.
- 2. The Reactor Supervisor attended DOE Security training at the Oak Ridge Y-12 facility.
June
- 1. Reactor Supervisor attended conference at Oregon State University.
- 3. All SROs successfully completed the Annual Operators Examination.
August
- 1. All appropriate facility personnel received forklift training for initial or annual recertification UCD/MNRC Annual Report2011 8
PWM MdULAN MMUM F&A'MWJbIE" UCD/MNRC ANNUAL REPORT FOR 2011 September
- 1. Senior Reactor Operators and Reactor Operator trainees attended one session of Reactor Theory.
October
- 1. Senior Reactor Operators and Reactor Operator trainees attended four sessions of Reactor Theory.
November
- 1. Senior Reactor Operators and Reactor Operator trainees attended one session of Reactor Theory.
December
- 1. Senior Reactor Operators and Reactor Operator trainees attended Technical Specifications training
- 2. Senior Reactor Operators and Reactor Operator trainees attended Portable Air Sample Procedure training and the 2011 Emergency Drill.
UCMNRC Annual Repor 2011 9
MNV IRC~ UCD/MNRC ANNUAL REPORT FOR 2011 UCD/MNRC OperatingHistory mOperatingHours 4500 4000 3500 3000 2500 2000 1500 1000 500-0 UCDOWNRC Annual Report 2011 10
MRRCIDN ~rI UCD/INRC ANNUAL REPORT FOR 2011 Reactor Hours (2011)
- Total Op-Hrs -B- Total MW-Hrs
Linear (2010 Op-Hrs) -- - Linear (2010 MW-Hrs) 1600 1400 1200 1000 0 800 x
600 400
-. - .°*
200 0
C 0. m i 5 0.
a U. 'U .% 0
'9 EL z 0 z LCDWAR Annual Report 2011 11
MRCDAI UCD/MNRC ANNUAL REPORT FOR 2011 Unschedule Reactor Shutdowns 2011 i&
-CSC -e--Other 2011 Total 0Ooa 2010Total
)( 7*
I-_ 1-C 40 'U 06
'U C Ch 0
m WL z I 0 z0 UCDWJNRC Annual Repom 2011 12
."M 1VVM"WJ'L UCD/MNRC ANNUAL REPORT FOR 2011 Reactor Tank IrradiationFacilities Total Number of IrradiationsCompleted (2011) 1-- Pneumatic Silicon Fixture Central Facility -*.--Argon -w- Neutron Irradiator --0--2011 Total - 2010 Total 70 60 50 40 30 20 10 0
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC UCDWNRC Annual Report 2011 13
t'( ýDAVIS mA'kL'RC*
Imm Wam-,%10,47"" "-Vtwwýtmtý UCD/MNRC ANNUAL REPORT FOR 2011 Bay Utilization (Shutter Operations)2011 600 500 C
0
.2 400 I,-.
300 I-E 200 mIL z
l l Ii li l l IIE IEI' II n IIn II II Iin IIn-II 100 - - - - in- -
0 Jan Feb I Mar I Apr I May I Jun IlnE-l i lEn Jul I Aug I Sep I Oct I Nov Dec lBay 1 486 336 496 488 465 517 405 334 377 416 512 259 mBay 2 77 82 167 186 115 110 191 206 255 228 239 96 3Bay 3 1 0 2 4 4 0 1 9 2 0 1 0 OBay 4 25 70 3 1 1 66 114 90 8 0 0 22 3 Months UCDOUNRC Annual Report 2011 14
t (DAVIS MNRC* UCD/MNRC ANNUAL REPORT FOR 2011 Bay IrradiationsCompleted 2011 500 450 Ul 400
.2350 300 I II I I I 1 I I I
,250
%0-200 0150 1E100 z 50 0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec EBay 1 465 296 476 426 384 378 418 351 401 399 476 243
- Bay 2 68 52 79 108 65 63 97 106 117 134 140 55 3Bay 3 0 0 0 1 3 0 1 8 3 0 1 0 DBay 4 6 7 3 0 2 4 14 10 0 1 5 3 Months UCDOMNRC Annual Report 2011 15
UCDAVIS MNRC*
MCCLELLAN NUCLEAR RESEARCH CENTER UCD/INRC ANNUAL REPORT FOR 2011 (JS 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 2011.
8.2 Airborne Effluents Airborne radioactivity discharged during 2011 is tabulated in Table 1 below.
TABLE 1 2011
SUMMARY
OF AIRBORNE EFFLUENTS (Ci) (uCl/mt) (%/0) (mrem) (%) (Ci) (uCi/ml)
JAN 1.12 5.97E-1 1 0.6% 3.64E-01 3.64% NONE NONE FEB 1.08 5.77E-1 1 0.6% 3.52E-01 3.52% NONE NONE MAR 1.61 8.58E-1 1 0.9% 5.23E-01 5.23% NONE NONE APR 1.47 7.84E-1 I 0.8% 4.77E-01 4.77% NONE NONE MAY 1.07 6.40E-1 1 0.6% 3.90E-01 3.90% NONE NONE JUN 1.12 5.95E-1 1 0.6% 3.62E-01 3.62% NONE NONE JUL 1.19 6.32E-1 1 0.6% 3.85E-01 3.85% NONE NONE AUG 1.21 6.46E-1 1 0.6% 3.93E-01 3.93% NONE NONE SEP 1.15 6.11E-11 0.6% 3.72E-01 3.72% NONE NONE OCT 1.13 6.03E-11 0.6% 3.67E-01 3.67% NONE NONE NOV 1.39 7.39E-1 1 0.7% 4.50E-01 4.50% NONE NONE DEC 0.96 5.1OE-11 0.5% 3.11E-01 3.11% NONE NONE TOT 14.49 7.79E-10 - 4.74 - NONE NONE AVG 1.21 6.50E-1 1 0.6% 4.0E-01 3.95%
(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); Limit for dose is 100mrem/year (20.1301)
UCDWINRC Annual Report 2011 16
UCDAVIS MNRC*
McCLELLAN NUCLEAR RESEARCH CENTER UCD/MNRC ANNUAL REPORT FOR 2011 8.3 Solid Waste No waste shipments were made in 2011 9.0 Radiation Exposure Radiation exposure received by facility operations personnel, facility users, and visitors during 2011 is summarized in Table 2 below.
TABLE 2 2011
SUMMARY
OF PERSONNEL RADIATION EXPOSURES
- Extremity monitoring was not required.
UCM#NRC Annualt RepW 2011 17
UCDAVIS MNRC McCLELLAN NUCLEAR RESEARCH CENTER UCDINRC ANNUAL REPORT FOR 2011 10.0 Radiation Levels and Levels of Contamination Radiation levels and levels of contamination observed during routine surveys performed at the MNRC during 2011 are summarized in Table 3 below.
TABLE 3 2011
SUMMARY
OF RADIATION LEVELS AND CONTAMINATION LEVELS DURING ROUTINE SURVEYS AVERAGE HIGHEST AVERAGE HIGHEST (mrem/hr) (mrem/hr) (dpm/ 100cm 2) (dpm/1O0cm 2)
OFFICE SPACES <0.1 <0.1 <800(l) <800(l)
REACTOR CONTROL RM <0.1 <0.1 <800(l) <800(l)
RADIOGRAPHY CONTROL RM <0.1 <0.1 <800(l) <800(l)
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(l) <800(l)
EQUIPMENT RM 0.45 68 <800(1) <800(1)
DEMINERALIZER AREA 30 300 <800(l) <800(l)
REACTOR RM 5 620 <800(1) <800(l)
SILICON STORAGE SHED <0.1 <0.1 <800(1) <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 UCDOWNRC Annual Report 2011 18
UCDAVIS MNRC McCLELLAN NUCLEAR RESEARCH CENTER UCD/MNRC ANNUAL REPORT FOR 2011 11.0 Environmental Surveys Environmental surveys performed outside of the MNRC during 2011 are summarized in Tables 4
& 5 below. The environmental survey program is described in the MNRC Facility Safety Analysis Report.
TABLE 4 2011
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 - 61 & 65-71) 7 17 (1) Natural background assumed to be the off base (Sites 27-42) average of 28 mrem.
UCDWNRC Annual Report 2011 19
UCDAVIS MNRC*
McCLELLAN NUCLEAR RESEARCH CENTER UCD/MNRC ANNUAL REPORT FOR 2011 TABLE 5 2011
SUMMARY
OF RADIOACTIVITY IN WELL WATER ALPHA BETA TRITIUM Cs-137 (pci/I) (pci/I) (pci/I) (pci/I)
AVERAGE <MDA 4.18E+00 <MDA <MDA HIGHEST 4.52E+00 MDA is the minimum detectable activity at the 95% confidence level.
The MDA range for the analyzed radionuclides (pCi/L).
MIN MAX Alpha 1.18E+00 1.72E+00 Beta 2.09E+00 3.17E+00 Tritium 3.17E+02 3.44E+02 Cs-137 2.08E+00 7.65E+00 UCDAMNRC Annual Report 2011 20