ML21060B458

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(Vnc) - Effluent Monitoring and Environmental Surveillance Programs 2020 Annual Report
ML21060B458
Person / Time
Site: 07000754, 07200001
Issue date: 03/01/2021
From: Smyly J
GE Hitachi Nuclear Energy
To:
Document Control Desk, Office of Nuclear Material Safety and Safeguards
References
M210024
Download: ML21060B458 (31)
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Text

(. HITACHI M210024 March 1, 2021 Chief, Fuel Facility Licensing Branch Division of Fuel Management Office of Nuclear Material Safety and Safeguards US Nuclear Regulatory Commission Washington, DC 20555-0001 Attn: Document Control Desk GE Hitachi Nuclear Energy Jeffrey Smyly Regulatory Compliance Manager 6705 Vallecitos Road Sunol, CA 94586 USA T 925-918-6074 Jeffrey.Smyly@ge.com

Subject:

Vallecitos Nuclear Center (VNC) Effluent Monitoring and Environmental Surveillance Programs 2020 Annual Report

References:

1) NRC License SNM 960, Docket 70-754 Enclosed is the 2020 Effluent Monitoring and Environmental Surveillance Programs Annual Report for the Vallecitos Nuclear Center (VNC) in Sunol, California.

If you have questions regarding this report or need additional information, please contact me using the contact information above.

Sincerely, Jeffrey Smyly, Regulatory Compliance Manager

Attachment:

Effluent Monitoring and Environmental Surveillance Programs, 2020 Annual Report JS21-002

USNRC M210024 March 1, 2021 cc: 1) Leonard Ash, (ACWD), leonard.ash@acwd.com

2) Matthew Soby (ACDEH), Matthew.Soby@acgov.org
3) Radioactive Materials Licensing Section California Department of Public Health Radiologic Health Branch 1500 Capitol Avenue, Suite 520, MS 7610 Sacramento, CA 95814-5006 Attn: Ira Schneider Page 2 of 2
4) Colleen Winey (Zone 7 Water Agency), cwiney@zone7water.com
5) American Nuclear Insurers 95 Glastonbury Boulevard, Suite 300 Glastonbury, CT 06033 Attn: Seth Breitmaier
6) USNRC, Region IV 1600 East Lamar Boulevard Arlington, TX 76011-4511 Attn: Regional Administrator
7) Osiris Siurano-Perez Project Manager Fuel Facility Licensing Branch Division of Fuel Management US Nuclear Regulatory Commission Mail Stop: TWFN 4A60 Washington, DC 20555-0001

HITACHI GE Hitachi Nuclear Energy, LLC EFFLUENT MONITORING AND ENVIRONMENTAL SURVEILLANCE PROGRAMS ANNUAL REPORT 2020 (Revision O)

March 1, 2021

M210024 US NRC 3/1/2021 NOTICE AND DISCLAIMER The GE-Hitachi Nuclear Energy, LLC (GEH) prepared this document. GEH and contributors to this document do not:

make any warranty or representation, expressed or implied, that the use of any information disclosed may not infringe privately owned rights; or assume responsibility for liability or damage of any kind, which may result from the use of any information disclosed.

M210024 US NRC 3/1/2021 TABLE OF CONTENTS TABLE OF CONTENTS..................................................................................................................................................... ii LIST OF FIGURES AND TABLES....................................................................................................................................... iii ABSTRACT..................................................................................................................................................................... iv

1.0 INTRODUCTION

........................................................................................................................................................ 1 1.1 1.2 Effluent Monitoring Program Environmental Surveillance Program 1

2 2.0 EFFLUENT MONITORING DATA................................................................................................................................4 Effluent Data 4

3.0 ENVIRONMENTAL SURVEILLANCE DATA................................................................................................................. 5 3.1 Groundwater 5

3.2 Stream Bottom Sediments 5

3.3 Vegetation 5

3.4 Storm Water 5

3.5 Gamma Monitoring 5

3.6 Ambient Air Monitoring 5

3.7 Gaseous Effluent Monitoring 5

4.0 REFERENCES

............................................................................................................................................................. 6 4.1 4.2 4.3 United States Nuclear Regulatory Commission (USNRC) License SNM-960 United States Nuclear Regulatory Commission (USNRC) License R-33 State of California Radiologic Health Branch License 0017-01 6

6 6

5.0 IMPROVEMENTS...................................................................................................................................................... 7 5.1 5.2 Environmental Control Dosimeter Evaluation Background Well Installation for Groundwater Sampling Program 7

7 6.0

SUMMARY

............................................................................................................................................................... 8 ii

M210024 US NRC 3/1/2021 LIST OF FIGURES AND TABLES Figure No.

Table No.

1 Topographic Map Of VNC 2

Sanitary and Industrial Discharge Treatment Facility 3

Water Sampling Locations 4

Air Sampling Locations and Gamma Monitoring Points 5

Analytical Results, Air Samples 6

Analytical Results, Stack Monitoring (Stack 4, Bldg. 102) 7 Analytical Results, Stack Monitoring (Stack 16, NTR) 8 Analytical Results, Stack Monitoring Composite (All Except Stacks 4 And 16) 1 Sample Collection Schedule 2

Groundwater Well Information 3

Stack Specifications 4

Radiological Effluent Samples 5

Ground Water Samples 6

Stream Bottom Sediment Samples 7

Vegetation Samples 8

Storm Water Samples 9

Dosimetry Results-Gamma Monitoring 10 Ambient Air Monitoring iii

M210024 US NRC 3/1/2021 ABSTRACT Annual, 2020 This report presents the data collected for the calendar year of 2020. The original copies of laboratory reports are on file at VNC.

Treated sanitary and industrial wastewater was disposed of on-site by an irrigation system. No surface runoff of sanitary or industrial wastes was observed during the report period.

Based on the analytical results of radiological samples collected from locations on-and off-site during the reporting period, VNC is in compliance with licenses issued by the U.S. Nuclear Regulatory Commission and California Department of Health, Radiologic Health Branch.

iv

M210024 US NRC 3/1/2021

1.0 INTRODUCTION

This report summarizes activities performed and data collected for the Effluent Monitoring and Environmental Surveillance Programs at Vallecitos Nuclear Center (VNC). Section 1.0 presents background information. Data collected during the reporting period is presented in Section 2.0 through 4.0. This report has been prepared to demonstrate compliance with state and federal requirements.

The VNC Site lies within the Livermore Upland physiographic area and is largely undeveloped grasslands with hills ranging in elevation from approximately 400 to 1,200 feet above mean sea level. The VNC Site property slopes to the southwest and drains through ditches to Vallecitos Creek which discharges to Arroyo de Ia Laguna near the north end of Sunol Valley-two or three miles southwest of the VNC Site.

VNC utilizes three drainage systems: industrial, sanitary, and storm. The industrial and sanitary systems discharge non-rad effluent into one of four 50,000-gallon retention basins located in the southwest corner of the site (Figure 2). The storm drainage system, essentially natural ditches, discharges storm water into a ditch parallel with Vallecitos Road (State Route 84). Storm drains from Buildings 103, 104, and 106 discharge to the west drainage ditch, while some storm drains in the Building 102, 105, 200, and 300 areas discharge to the east drainage ditch.

As shown in Figures 2 and 3, these ditches merge prior to exiting the southwest corner of the site.

Groundwater levels of the developed site vary from 2 to 3 feet below ground surface (during winter near Retention Basins 2 and 3) to 30 to 40 feet (during the summer northwest of the road leading to the water tank). A USGS geology study shows that groundwater generally flows toward the southwest. The velocity of groundwater is estimated by USGS to be about 0.01 ft/day in clays to 8ft/day in gravels. In areas where gravels with a considerable mixture of clay (most of developed site) are saturated close to the land surface, southwesterly movement occurs at an average rate of approximately 2 ft/day1.

1.1 Effluent Monitoring Program The purpose of the Effluent Monitoring Program is to ensure that VNC site release limits for effluent are not exceeded. The Program includes measuring radioactive constituents in water discharged through the site sanitary and industrial wastewater systems. Measurements are determined by collecting samples of effluent. The schedule of sample collection is presented in Table 1.

The United States Nuclear Regulatory Commission (NRC) have established radiological release limits. These limits are listed in 10CFR20, Appendix B.

Effluent Characteristics Effluent discharge from VNC is made up of industrial wastewater and clean water. Discharges of industrial wastewater consist primarily of non-contact cooling water. The discharges are either held in one of three available 50,000-gallon retention basins and or used for non-potable purposes, such as landscape watering. After July 1'\\

2003 no discharges to surface waters have been made from these sources. Samples are collected from each basin prior to discharge to on site irrigation. In addition, samples from all basin discharges are accumulated and analyzed at specified intervals for a variety of constituents.

Discharges of clean water consist of storm water runoff and small quantities of water known to contain no contaminants. These waters flow directly to drainage ditches that enter Vallecitos Creek.

Sanitary Waste Handling Sanitary waste (sludge) is collected in an Imhoff tank before undergoing sand filtration and chlorination (by addition of sodium hypochlorite solution). Samples of sanitary waste (sludge) are collected before each Imhoff Tank clean-out. There were no clean-outs performed on the Imhoff tank during 2020. Processed sanitary 1 A delay of over 2 years from the nearest postulated spill point to the site boundary.

1

M210024 US NRC 3/1/2021 wastewater is sprayed onto VNC property by an irrigation system in a designated area (Figure 2). The procedure is monitored so that no surface runoff occurs.

Gaseous Effluent Monitoring Several operations at the site utilize exhaust stacks. Air is collected from single or multiple operating areas via a ventilation system. The ventilation system is generally comprised of ductwork, particulate filtration systems, blowers, and an exhaust stack. The gaseous effluent is monitored. The specifications of each stack are listed in Table 3.

The various site operating licenses (SNM-960, R-33, and State 0017-01) and federal regulations require that the gaseous effluents released to unrestricted areas be limited and controlled to maintain the concentrations of radioactive material in the unrestricted area as low as reasonably achievable but at least no greater than the values in Appendix B, Table II of 10CFR20.

The method by which releases are determined to be within these limits is to establish average release limits and control values for each stack and then measure the average releases through monitoring and/or sampling of the effluents. The control values are, in general, established as 10% of the license release limits.

Both sampling and monitoring techniques are used to determine gaseous effluent releases. Release results reported to regulatory agencies for particulates and halogens are obtained from sampling systems. Noble gas results are obtained from charts or electronic integrators on monitoring equipment.

The COMPLY computer code is run to determine the dose at the site boundary from annual airborne effluents.

This evaluation was formerly required when 40CFR61 Subpart I applied to NRC licensees, which included VNC. The regulation was amended to exclude NRC licensees. However, VNC has continued to run the COMPLY code to demonstrate compliance with the constraint rule per Regulatory Guide 4.20 and 10CFR20.1101d. Verifying compliance with annual public dose per 10CFR20.1301, "Dose Limits for Individual Members of the Public".

1.2 Environmental Surveillance Program The purpose of the Environmental Surveillance Program is to determine if discharges from VNC are detectable in the environment. The Program includes measuring radioactive constituents in neighboring streams, wells, and soils at locations near or beyond the site perimeter. Samples of groundwater, stream bottom sediments, and vegetation are collected. The schedule of sample collection is presented in Table 1.

Groundwater Monitoring Groundwater is monitored by collecting and analyzing samples from eight wells located on or near VNC. Samples are analyzed for radiological contaminants. Well identification numbers, corresponding California State Well Numbers, and descriptions of locations are listed in Table 2. Wells installed in the early 1970s in and around Building 102 are checked on a quarterly basis for water. Some of these wells have been dry for several years and sampling is not possible. When samples are collected from these sources, they are sent to the lab for analysis.

Vegetation Monitoring Vegetation is monitored by collecting and analyzing samples of vegetation at two locations designated V-2 and Vai-IV.

Station V-2 VAL-IV Description Easternmost stream crossing south boundary of site West of site boundary, 500 feet down Little Valley Road 2

M210024 US NRC 3/1/2021 Stream Bottom Sediment Monitoring Stream bottom sediment is monitored by collecting and analyzing samples at one location designated as S-4. The location is at the outfall of the retention basins at south boundary of site.

Air Monitoring There are four air monitoring stations, designated as A-1 through A-4, across the site. The stations are positioned approximately 90° apart around the operating facilities of the site. The locations of the stations are shown in Figure 4.

To collect samples, each station is equipped with a membrane filter and an activated charcoal cartridge. The filter is changed weekly 2 and counted for gross alpha and gross beta radiation. The cartridge is removed and analyzed only in the event of a suspected radioactive iodine release.

Gamma Monitoring There are 20 monitoring stations on site for measuring gamma radiation in the environment. Each station is constructed of a steel mailbox and equipped with a dosimeter. The dosimeter is sealed in plastic. The dosimeters are exchanged annually. The locations of the stations are shown in Figure 4.

For reporting purposes, the dosimeters are distributed as follows:

South Boundary-Stations 1, 2, 3 East Boundary-North Boundary-Stations 4,5,6 Stations 7,12,13 West Boundary-Stations 8,9,10,11 Background Dosimeters-Stations 14,15,16,17,18,19,20 The dosimeter vendor reports the measurements of each dosimeter and determines the background measurement. Background is determined by using a dosimeter that has been exposed to background radiation at this facility and is from the same batch of OSL material as the dosimeters exposed at VNC.

1.3 Laboratory Analyses On-site and external laboratories perform the analyses of samples collected at VNC as required for the programs.

Samples analyzed by the on-site laboratory are reported as measured value or less than minimum detectable activity (MDA) values, while samples analyzed by the external laboratories are reported as actual measured values.

Values within the statistical background may be listed as zero or as a positive or negative numbers. All analyses are performed using approved USEPA methodology with minimum sensitivities equal to or less than permit limits.

All records of analytical results are maintained at VNC.

On-site Laboratory Analyses The following list of analyses are performed by the on-site laboratory:

Total Alpha-Emitting Radioactivity Total Beta-Emitting Radioactivity Off-site Laboratory Analyses The external laboratories that have been contracted to analyze samples collected for the program are GEL, located in Charleston, South Carolina, performs radiological analyses on samples of water and Davi Lab. Davi Lab, located in Hercules, California, performs radiological analyses on samples of water, stream bottom and vegetation.

2 During dusty conditions, the filters are changed as determined by the RMT, Facilities Protection.

3

M210024 US NRC 3/1/2021 2.0 EFFLUENT MONITORING DATA This section presents the discharge information and analytical results for samples collected for the Effluent Monitoring Program during the reporting period.

Effluent Data Compliance Summary Required samples collected during the reporting period and the analytical results of tests are in compliance with Permit limits.

Treated sanitary and industrial wastewater was disposed of on-site by an irrigation system. No surface runoff of sanitary or industrial waste occurred during the report period.

Based on the analytical results of radiological samples collected from locations on and off-site during the reporting period, VNC is in compliance with all licenses issued by the U.S. Nuclear Regulatory Commission and California Department of Health, Radiologic Health Branch.

Non-radiological Analytical Results Summaries of data relating to non-radioactive effluent parameters are given in Table 5 through 9. The results indicate that all constituents of concern are in compliance with regulatory limits.

Table 4 Sample Analysis Results of sampling of industrial effluent waters for radiological contaminates prior to release from the property is summarized in Table 4. The VNC has no radiological liquid effluent pathways and sampling for radiological contamination in industrial effluent is not required by the State of California. The provided monthly specific activities are summed totals from samples taken of daily water releases. Entries of zero (0) indicate results below the detection limits of laboratory instruments. No radiation was detected that exceeded regulatory limits.

4

1 Mile Scale 1:24,000 Figure 1 Topograghic Map of GE Vallecitos Nuclear Center Countour Interval 1 0' based on USGS Maps, Lacosta Valley and Livermore, CA

M210024 US NRC 3/1/2021

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M210024 US NRC 3/1/2021 FACILITlES MAINTENANCE Legend VAL-IV Vegetation Sampling Station Proposed fa InclUsion n Monlamg Wei NeiWOrk GroundwalOf Men tor.,g V.VII 0

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M210024 USNR 3/1/2021 VALLECITOS ROAD (HWY 84)

Gamma Monitoring Points 1-20 Air Sampling Stations Al-A4 FIGURE 4 VALLECITOS NUCLEAR CENTER ENVIRONMENTAL DOSIMETER LOCATIONS

M210024 US NRC 3/1/2021

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M210024 US NRC 3/1/2021 1-1Ci 0.100 0.090 1 0.080 0.070 0.060 0.050 0.040 0.030 0.020 0.010 0.000 JAN 102A ALPHA 102A BETA-GAMMA 1-1Ci 3.55 3.05 2.55 2.10 O.OJ I

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Limit = 360 1-1Curies I Week (1,440 1-1Curies I Month)

Figure 6. Analytical Results, Stack monitoring (Stack 4, Bldg. 1 02)

M210024 US NRC 3/1/2021 J..LCi 105 ALPHA 0.010 r---------------------------------,

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Figure 7. Analytical results, Stack Monitoring (Stack 16, NTR)

M210024 US NRC 3/1/2021

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Figure 8. Analytical Results, Stack Monitoring Composite (All except Stacks 4 and 16)

M210024 US NRC 3/1/2021 3.0 ENVIRONMENTAL SURVEILLANCE DATA This section presents the analytical results for samples of ground water, stream bottom sediments, and vegetation collected for the Environmental Surveillance Program during the reporting period.

3.1 Groundwater Analytical results of groundwater samples collected from the wells as indicated in Table 2 during the reporting period are listed in Table 5.

3.2 Stream Bottom Sediments Analytical results of stream bottom sediment samples collected during the reporting period are listed in Table 6.

3.3 Vegetation Analytical results of vegetation samples collected during the reporting period are listed in Table 7.

3.4 Storm Water Analytical results of storm water samples collected during the reporting period are listed in Table 8.

3.5 Gamma Monitoring The results of gamma monitoring during the reporting period are listed in Table 9.

3.6 Ambient Air Monitoring Analytical results of environmental air samples collected during the reporting period are graphically presented in Figure 5, data in Table 10. All readings are within normal annual variability.

3.7 Gaseous Effluent Monitoring Stack Monitoring Analytical results of gaseous effluent samples collected for stack monitoring during the reporting period are graphically presented in Figures 6 through 8.

Effective Dose Equivalent The calculated Effective Dose Equivalent at Screening Level 2 resulting from the annual measured releases, as calculated by the Comply Code, are:

Property Line 0.5 mRem/year due to all emissions, and 4.4E-04 mRem/year from iodine.

Site Developed Area 3.5 mRem/year due to all emissions, and 2.9E-03 mRem/year from iodine.

5

M210024 US NRC 3/1/2021

4.0 REFERENCES

This section has the references that are required to be met by this Environmental Monitoring Report.

Licenses 4.1 United States Nuclear Regulatory Commission (USNRC) License SNM-960 4.2 United States Nuclear Regulatory Commission (USNRC) License R-33 4.3 State of California Radiologic Health Branch License 0017-01 6

M210024 US NRC 3/1/2021 5.0 IMPROVEMENTS This section presents anomalies, deficiencies, deviation, or improvements in adherence to the Effluent Monitoring and Environmental Surveillance Programs at VNC for the reporting period.

5.1 Environmental Control Dosimeter Evaluation An evaluation of the VNC environmental dosimeter results from 2010-2020 was performed. That evaluation identified that the control dosimeters generally received more dose than the field monitoring dosimeters by approximately 10 -15 mrem/yr. This Condition Report is to evaluate the potential cause and determine if actions are necessary to address the condition. The VNC environmental dosimeter trending evaluation is attached to the CR. CR # 36331 was generated to track this improvement.

5.2 Background Well Installation for Groundwater Sampling Program An evaluation of VNC Environmental Monitoring Manual was performed by Chesapeake Nuclear Services and one of the recommendations was to add an upstream background well to the program. At the time the assessment recommendations were being completed to update the Environmental Monitoring Plan VNC believed that the cattle well (an existing well) could be utilized as the background well. Upon further evaluation by a Hydrologists it was determined the cattle was not appropriate to monitor upstream conditions of the shutdown reactors.

Consequently, the Hydrologist identified an appropriate location and depth for a background well. This Condition Report is to track the installation of the background well and completion of the recommendation for a background well to for the Environmental Monitoring Program. The completed Assessment is attached to this CR. CR # 36332 was generated to track this improvement.

7

M210024 US NRC 3/1/2021 G.O

SUMMARY

This section presents a summary of the results of the water Monitoring Program for the reporting period.

The analytical results of radiological samples collected during the reporting period indicate that effluent discharges from VNC were in compliance with Water Permit limits and airborne releases were in compliance with licenses issued by the U.S. Nuclear Regulatory Commission.

Additionally, neither surface runoff of processed sanitary wastewater, nor industrial wastewater was observed.

The Effluent Monitoring and Environmental Surveillance Programs continue to be effective.

8

M210024 US NRC 3/1/2021 Designation Location E-001 and E-002 (Basin 1-4}

Station E-003 (Storm Water)

S-4 Stream Bottom (Sediments)

V-2 & VAL IV (Vegetation)

Groundwater Wells TABLE 1. SAMPLE COLLECTION SCHEDULE Constituent Sample Type Frequency Gross Alpha Grab Each discharge Gross Beta Grab Each discharge Gross Alpha Composite Monthly Gross Beta Composite Monthly Gross Alpha Grab Twice each half of reporting year Gross Beta Grab Twice each half of reporting year Tritium Grab Twice each half of reporting year Gross Alpha Grab Annually, usually First week in May Gross Beta Grab Annually, usually First week in May Co-60, Cs-137 Gross Alpha Grab Annually, usually First week in April Gross Beta Grab Annually, usually First week in April Gross Alpha Grab Quarterly Gross Beta Grab Quarterly Tritium Grab Quarterly Sr-90 Grab Quarterly

M210024 US NRC 3/1/2021 Site Well No.

GN GA GP MW-1 MW-7 MW-8 MW-9S MW-90 TABLE 2-GROUNDWATER WELL INFORMATION California State Well No.

Location Description 4S/1E-2N1 Southeast of Building 105 4S/1E-10A1 Southwest of Building 102 0.6 miles southwest of site entrance on 4S/1E-10P3 private property 4S/1E3R2 Bldg. 102 Parking Lot 4S/1E-10G3 Southwest from Basins 4S/1E2M01 Southwest of GETR Reactor 4S/1E2P1 Southwest of EVESR and VBWR Reactors 4S/1E2P2 Southwest of EVESR and VBWR Reactors

M210024 US NRC 3/1/2021 Stack Number 4

12 TABLE 3-STACK SPECIFICATIONS Location Components Serviced Bldg. 102A Remote Handling Operation, Isotope Production Facility, Radiochemistry, Bldg. 103 Remote Handling Operations Radioactive Materials Storage Room Metallurgy and Ceramics Laboratories, Height (feet ags) 75 48 Diameter (inches) 66 60 Flow Rate (cfm}

34,702.8 31,924.5

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26 Area 200 General Electric Test Reactor 29 19 NA

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30 Waste Liquid Waste Evaporator 25 13x17.75 3,123.9

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34 Waste Waste Storage Facility 25 13x17.75 NA

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37 Notes:

HSF Bunker Bunker Area of Hillside Storage Facility ags-above ground surface cfm-cubic feet per minute Stacks 26, 34, and 37 did not operate during 2020.

40 35 NA

M210024 US NRC 3/1/2021 TABLE 4-MONTHLY EFFLUENT SAMPLES, E-002-L Contract Service Data Contract Service Data Monthly Effluent (Industrial)

Monthly Effluent (Sanitary)

Composite Sample (pCi/L)

Composite Sample (pCi/L)

Gross Alpha Gross Gross Alpha Gross Beta Month Beta Tritium Tritium January 3.82 1.63 471 3.96 1.48 326 February 3.88 2.19 783 1.90 2.27 379 March 0

0.92 137 1.58 4.26 123 April 4.49 5.90 194 2.24 2.37 452 May 1.10 1.00 186 3.28 4.60 426 June 3.66 1.12 282 No Discharge July 5.17 1.68 189 No Discharge August 1.22 0.84 78 2.96 2.94 149 September 3.66 1.12 185 5.03 1.77 394 October 2.19 0.81 113 No Discharge November 0.81 3.09 75 No Discharge December ND 0.35 265 No Discharge Footnotes for Table 4:

[1] There were no sanitary discharges made during months of June, July, October, November, and December.

M210024 US NRC 3/1/2021 Quarterly Month February '20 May '20 September '20 November '20 Annual Average Gross Alpha 4.95 3.14 1.77 5.73 3.90 TABLE 5-QUARTERLY GROUND WATER SAMPLES 4S/1E-2Nl (GN) 4S/1E-10Al (GA) 4S/1E-10P3 (GP)

(pCi!L)

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Gross Tritium Gross Gross Tritium Gross Gross Beta Sr-90 Alpha Beta Sr-90 Alpha Beta Sr-90 1.50 363 0.57 3.84 484 0.34 0.12 2.29 400 4.78 3.00 165 7.79 1.28 4.20 0.90 19 5.73 4.58 0.33 224 2.67 4.46 0.37 1.46 0.66 96 3.42 2.72 0.54 65 2.36 1.83 0.30 2.36 0.78 220 3.63 3.54 0.44 235 3.29 1.92 0.34

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0

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<C February'20 May'20 GN Gross Alpha GP Qoss Beta GN Gross Beta

~ GNTritium 1500 1000 500 0

September' 20 November' 20 GAGrossAIP,a

~ GATritium GA. Gross Beta

--- GPTritium GPGrossAIP,a Tritium 749 49 186 20 251

M210024 US NRC 3/1/2021 Quarterly Sample Month February '20 May '20 September '20 November '20 Annual Average Gross Alpha 2.92 1.98 2.55 2.29 2.44 TABLE 5-QUARTERLY GROUND WATER SAMPLES MW-8 (4S-1E2M01)

MW-9S (4S-1E2Pl)

(pCi/1)

(pCi/1)

Gross Gross Gross Beta Sr-90 Tritium Alpha Beta Sr-90 Tritium 0.66 1281 0.80 3.60 725 2.17 440 3.15 1.73 317 3.57 0.97 488 4.91 4.47 0.99 219 3.09 0.60 149 1.87 1.98 0.79 100 2.37 0.79 590 2.68 2.95 0.89 340 Ground Water Activities MW-9D (4S-1E2P2)

(pCi/1)

Gross Gross Alpha Beta Sr-90 Tritium 0.36 1.64 556 2.50 1.39 249 4.14 2.81 0.68 91 3.06 1.13 0.04 76 2.52 1.74 0.36 243

_10

~ 9

~ 8

, 1400

('IS 7 E 6 E

('IS 5

~ 4

~ 3 m

'iii 2

~ 1

<( 0 1200

~-----------------------------------------------------1 1000 February' 20 May' 20 September' 20 Month 800 600

L 400 200

.__ ____,_______L_ 0 Novem be r'20 MW-8 Gross Alpha MW-8 Gross Beta MW-9S Gross Alpha -

MW-90 Gross Alp he MW-90 Gross Beta MW-8 Sr-90 MW-9S Sr-90 MW-90 Sr-90 MW-9S Gross Beta -- MW-8 Tritium MW-9S Tritium MW-90 Tritium TABLE 5-CONTINUED-ANNUAL GROUND WATER SAMPLES Annual Sample MW-1 (1E-3R2)

MW-7 (1E-10G3)

(pCi/1)

(pCi/1)

Gross Alpha Gross Beta Sr-90 Tritium Gross Gross Sr-90 Tritium Month Alpha Beta September' 20 5.92 4.66 0.28 0

5.66 2.95 0.96 194

M210024 US NRC 3/1/2021 Sample Number S-4 Sample Number Val-2 Vai-IV Sample Number sw TABLE 6-STREAM BOTTOM SEDIMENT SAMPLES Date Collected 5/22/2020 Gross a (pCi/g) 0.57 Gross 13 (pCi/g) 0.84 TABLE 7-VEGETATION SAMPLES Date Collected 4/6/2020 Date Gross a Collected (pCi/g) 4/1/2020 0.00 4/1/2020 0.40 TABLE 8-STORM WATER Gross a (pCi/g) 3.64 Gross 13 (pCi/g) 0.80 Co-60 (pCi/g) 0.00 Tritium (pCi/g) 147 Cs-137 (pCi/g) 0.00 Gross 13 (pCi/g) 3.87 3.10

M210024 US NRC 3/1/2021 South Boundary TABLE 9-DOSIMETRY RESULTS GAMMA MONITORING 2020 East Boundary West Boundary North Boundary

Background

Dosimeters Station No.

I Station No.

i (mRem/yr)

Station Statio n No.

Station i (mRem/yr)

No.

(mRem/yr)

(mRem/yr)

No.

(mRem/yr) 8 74.4 71.9 4

76.9 78.0 7

I i

14 71.1

  • -*-*-*-*-r-*-*-*-*-*-*-*-*

i I

-*---~---*-:*-----;~-_;-----r-----~-----:*-----~;-_~----

!---------------T-----------~-------------- ----------- --------------- ----------1-----------------

1 I

I 3

70.7 6

72.1 13 82.2 10 I

69.6

_;_l _____

_,_ ____ l'---------'-------'-------+----------i-----------------

12 75.1 9

63.6 15 73.1 16 71.7 11 I

77.2 17 72.9 I

'--------'-------+----------- --------------

Notes:

  • Dose > Control Dosimeter See Figure 4 for location.

The dosimeters at each station were collected on December 9, 2020.

Gross Values Represented (No background subtracted from control readings).

Control Dosimeter reads 87.0 mRem/yr (Control Badge is in building 102B).

TABLE 10- AMBIENT AIR MONITORING Action Levels Beta (6.6x10-14) Alpha (5.9x10-14) 2020 ENVIRONMENTAL STATIONS uCi/ml MONTH STATION ONE STATION TWO STATION THREE BETA ALPHA BETA ALPHA BETA ALPHA JAN 1.71E-14 8.36E-16 1.75E-14 1.40E-15 1.32E-14 2.93E-16 FEB 2.92E-14 1.11E-15 2.32E-14 3.36E-16 2.71E-14 2.60E-15 MAR 2.34E-14 1.09E-15 2.20E-14 1.32E-15 1.74E-14 3.32E-16 APR 1.32E-14 3.43E-16 2.03E-14 6.46E-16 1.02E-14 5.36E-16 MAY 1.24E-14 4.38E-16 2.21E-14 6.81E-16 2.13E-14 6.11E-16 JUN 4.65E-14 1.67E-16 2.34E-14 1.01E-15 2.78E-14 4.13E-16 JUL 6.05E-14 4.35E-16 2.14E-14 6.01E-16 2.79E-14 6.63E-16 AUG 4.02E-14 1.18E-15 2.85E-14 1.50E-15 2.39E-14 1.82E-15 SEP 6.00E-14 2.21E-15 4.62E-14 2.41E-15 3.00E-14 2.24E-15 OCT 6.97E-14 9.64E-16 3.82E-14 7.86E-16 6.14E-14 1.28E-15 NOV 5.45E-14 1.87E-15 2.11E-14 6.08E-16 5.91E-14 1.64E-15 DEC 7.51E-14 3.39E-15 7.36E-14 3.32E-15 6.98E-14 2.48E-15 AVERAGE 4.18E-14 1.17E-15 2.98E-14 1.22E-15 3.24E-14 1.24E-15 Notes:

See Figure 4 for location See Figure 5 for graphical representation 18 70.7 19 68.5 20 75.1 STATION FOUR BETA ALPHA 1.60E-14 1.07E-15 2.23E-14 9.19E-16 1.96E-14 1.34E-15 1.93E-14 6.27E-16 1.86E-14 8.25E-16 2.06E-14 3.97E-16 2.93E-14 3.18E-15 2.31E-14 3.53E-15 3.74E-14 2.68E-15 3.58E-14 1.08E-15 5.08E-14 2.05E-15 6.68E-14 3.01E-15 3.00E-14 1.72E-15

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