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Appendix F - Annual Radiological Groundwater Protection Program Report (Argppr)
	ML17132A208
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Site:	Dresden
Issue date:	05/31/2017
From:	; Teledyne Brown Engineering Environmental Services
To:	; Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation
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APPENDIX F ANNUAL RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM REPORT {ARGPPR)

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Docket No:

50-010 50-237 50-249 DRESDEN NUCLEAR POWER STATION UNITS 1, 2 and 3 Annual Radiological Groundwater Protection Program Report 1 January through 31 December 2016 Prepared By Teledyne Brown Engineering Environmental Services

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~~-;'Y Exelon Generation,1t Dresden Nuclear Power Station Morris, IL 60450 May 2017

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Table of Contents I. Summary and Conclusions.............................................................................................. 1 II. Introduction..................................................................................................................... 2 A. Objectives of the RGPP...................................................................................... 3 B. Implementation of the Objectives........................................................................ 4 C. Program Description........................................................................................... 4 D. Characteristics of Tritium (H-3)........................................................................... 5 Ill. Program Description...................................................................................................... 5 A. Sample Analysis.................................................................................................. 5 B. Data Interpretation............................................................................................... 6 C. Background Analysis........................................................................................... 7

1. Background Concentrations of Tritium..................................................... 7 IV. Results and Discussion................................................................................................. 9 A. Groundwater Results........................................................................................... 9 B. Surface Water Results...................................................................................... 11 C. Precipitation Water Results............................................................................... 11 D. Drinking Water Well Survey.............................................................................. 12 E. Summary of Results - Inter-laboratory Comparison Program.......................... 12 F. Leaks, Spills, and Releases.............................................................................. 12 G. Trends............................................................................................................... 12 H. Investigations.................................................................................................... 12 I. Actions Taken..................................................................................................... 12

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Appendices ARGPPR Appendix A Tables Table A-1 Figures ARGPPR Appendix B Tables Table B-1.1 Table B-1.2 Table B-1.3 -

Table B-11.1 Table B-11.2 Table B-111.1 Location Designation Radiological Groundwater Protection Program - Sampling Locations, Distance and Direction, Dresden Nuclear Power Station, 2016 Security-Related Information: Maps of the Dresden Nuclear Power Station have been withheld from public disclosure under 1 OCFR2.390 and N.J.S.A. 47:1A-1.1 Data Tables Concentrations of Tritium, Strontium, Gross Alpha arid Gross Beta in Groundwater Samples Collected-in the-Vicinity of Dresden Nuclear Power Station, 2016 Concentrations of Gamma Emitters in Groundwater Samples Collected in the Vicinity of Dresden Nuclear Power Station, 2016 Concentrations of Hard-To-Detects in Groundwater Samples Collected in the Vicinity of Dresden Nuclear Power Station, 2016 Concentrations of Tritium in Surface Water Samples Collected in the Vicinity of Dresden Nuclear Power Station, 2016 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of Dresden Nuclear Power Station, 2016 Concentrations of Tritium in Precipitation Water Samples Collected in the Vicinity of Dresden Nuclear Power Station, 2016

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I.

Summary and Conclusions Dresden Station is situated on approximately 600 acres of land that borders the Illinois River to the north and the Kankakee River to the east. This land is referred to as the owner-controlled area. The Dresden power plant itself takes up a small parcel of the owner-controlled area and is surrounded by a security fence. The security fence defines what is known as the Protected Area (PA).

The Dresden power plant has experienced leaks from underground lines and spills from systems containing radioactive water over its 50 year history. These incidents have created a number of areas of localized contamination within the PA. The liquid scintillation analyses of groundwater in many of these areas show measurable concentrations of tritium (H-3).

Dresden participated in a fleetwide hydrogeologic investigation in during the summer of 2006 in an effort to characterize groundwater movement at each site.

This investigation also compiled a list of the historic spills and leaks as well as a detailed analysis on groundwater hydrology for Dresden Nuclear Generation Station. Combining the tritium concentration in a locally contaminated area with 1,.

the speed and direction of groundwater in the vicinity can produce a contaminated groundwater plume projection. If the plume of contaminated groundwater passes through the path of a groundwater monitoring well, it can be anticipated that the tritium concentration in this well will increase to some maximum concentration, then decrease over time.

The fleetwide *Hydrogeologic Investigation Report (HIR) shows that groundwater movement on the Dresden site is very slow. In addition, there is a confining rock layer, the Maquoketa Shale layer, about 55 feet below the surface that impedes groundwater movement below this depth.

Dresden has a domestic water system that is supplied by two deep wells (1500 feet deep) that were installed about 50 years ago south of the PA. Samples taken from domestic water supply have never shown any detectable tritium concentration.

Tritium has a half-life of 12.3 years. This means that 40 years from now 90% of the tritium on site today will have decayed away to more stable elements. Given the limited volume of contaminated groundwater on site, radioactive decay, slow groundwater movement, and dilution effects, the conclusion of the HIR is that the operation of Dresden Nuclear Power Station has no adverse radiological impact on the environment. As a result there is little potential for contaminated groundwater on site to affect off-site drinking water.

II.

Introduction Radiological Groundwater Monitoring Program (RGPP):

Dresden has a Radiological Groundwater Monitoring Program (RGPP) that provides long-term monitoring intended to verify the fleet-wide hydrogeologic study conclusions. Dresden uses developed groundwater wells and surface water sample points in the RGPP.

The Dresden RGPP was established in 2006 and there have been no significant changes to this program. This program does not impact the operation of the plant and is independent of the REMP.

Developed groundwater wells are wells that were installed specifically for monitoring groundwater. These wells are equipped with screens and are properly sealed near the surface to avoid surface water intrusion. The wells were designed in accordance with appropriate codes and developed in accordance with appropriate standards and procedures. Dresden has groundwater monitoring wells identified as "shallow" (depths from 15 to 35 feet),

"Intermediate" (depths from 35 to 55 feet) and "deep" (depths beyond 100 feet).

All wells installed to a depth greater than 100 feet ("deep" wells) were found to be dry and removed from the RGPP. Surface water sample points are identified sample locations in the station's canals and cooling pond.

There are 96 sampling points in the RGPP:

Dresden has 47 developed groundwater monitoring wells within the Protected Area (PA). Some of these wells form a ring just inside the security fence and the remaining wells were installed near underground plant system piping that contains radioactive water.

Dresden has 30 developed groundwater monitoring wells outside the PA the majority of which form a ring just within the perimeter of the property.

Dresden has 12 surface water monitoring locations on the owner-controlled area sampled as part of the Dresden RGPP. Three of these locations are monitored for level only and have no analyses in the accompanying tables.

Dresden has 4 precipitation water monitoring locations sampled as part of the Dresden RGPP. An additional 8 locations were studied in 2011 through 2012, but only 4 locations are currently permanently a part of the RGPP program.

Dresden has 1 sentinel well and 2 CST leak detection valves. These 3 sampling points are not constructed to code or developed to a standard. These sampling points are idle and only used for qualitative troubleshooting.

,,i' The Dresden site-specific RGPP procedure identifies the historic 'events' that would affect the individual RGPP sample results. This procedure identifies threshold values for each sample point, which if exceeded, could be an indication of a new spill from an above ground system or a new leak in an underground pipe containing tritiated water.

The RGPP sample points are currently sampled on a frequency determined by the well detection category in accordance with site document EN-DR-408-4160, Dresden RGPP Reference Material. During 2016, there were 580 analyses that were performed on 270 samples from 80 sampling points.

Sentinel Wells, sometimes referred to as "baby wells" are wells that were installed to monitor local shallow groundwater; typically in associated with a historic underground pipe leak. These wells are not constructed to code or developed to a standard. Most sentinel wells are from 6 to 12 feet deep and consist of 2" PVC pipe without screens. These wells are categorized as idle wells and are used only for troubleshooting purposes.

Dresden has two basic storm water runoff sewer systems within the P.A: one storm-system routes to the east, then north and discharges into the Unit 1 intake canal, the second storm-system routes to the west, then north, through a large Oil/Water Separator and discharges to the hot canal. Both the Unit 1 intake canal and the hot canal eventually route to the cooling pond. The Dresden Station RGPP has twelve RGPP surface water sampling points to monitor these systems.

A Objectives of the RGPP The Objective of the RGPP is to provide long-term monitoring intended to verify the fleet-wide hydrogeologic study conclusions. The objective of the site-specific RGPP is to provide indication of short-term changes to groundwater tritium concentrations within the PA If isotopic results of groundwater samples exceed the thresholds specified in this procedure it could be an indication of a new spill from an above ground system or a new leak in an underground pipe containing tritiated water.

Specific Objectives include:

1.

Perform routine water sampling and radiological analysis of water from selected locations.

2.

Report new leaks, spills, or other detections with potential radiological significance to stakeholders in a timely manner.

3.

Regularly assess analytical results to identify adverse trends.

4.

Take necessary corrective actions to protect groundwater resources.

B.

Implementation of the Objectives

1.

Dresden Nuclear Power Station will continue to perform routine sampling and radiological analysis of water from selected locations.

2.

Dresden Nuclear Power Station has implemented procedures to identify and report new leaks, spills, or other detections with potential radiological significance in a timely manner.

3.

Dresden Nuclear Power Station staff and consulting hydrogeologist assess analytical results on an ongoing basis to identify adverse trends.

4.

If an adverse trend in groundwater monitoring analytical results is identified, further investigation will be undertaken. If the investigation identifies a leak or unidentified spill, corrective actions will be implemented.

C.

Program Description Dresden has a Radiological Groundwater Monitoring Program (RGPP) that provides long-term monitoring intended to verify the fleet-wide hydrogeologic study conclusions. Dresden uses 89 developed groundwater wells and surface water sample points in the RGPP.

1.

Sample Collection Sample locations can be found in Table A-1, Appendix A.

Groundwater and Surface Water Water samples are collected in accordance with the schedule delineated in the Dresden site-specific RGPP procedures.

Analytical laboratories are subject to internal quality assurance programs, industry crosscheck programs, as well as nuclear industry audits. Station personnel review and evaluate the analytical results.

D.

Characteristics of Tritium (H-3)

Tritium (chemical symbol H-3) is a radioactive isotope of hydrogen. The most common form of tritium is tritium oxide, which is also called "tritiated water." The chemical properties of tritium are essentially those of ordinary hydrogen.

Tritiated water behaves the same as ordinary water in both the environment and the body. Tritium can be taken into the body by drinking water, breathing air, eating food, or absorption through skin.

Once tritium enters the body, it disperses quickly and is uniformly distributed throughout the body. Tritium is excreted primarily through urine with a clearance rate characterized by an effective biological half-life of about 14 days. Within one month or so after ingestion, essentially all tritium is cleared. Organically bound tritium (tritium that is incorporated in organic compounds) can remain in the body for a longer period.

.. Tritium is produced naturally in the upper atmosphere when cosmic rays

.* strike air molecules. Tritium is also produced during nuclear weapons

explosions, as a by-product in reactors producing electricity and in special production reactors, where the isotopes lithium-? and/or boron-10 are activated to produce tritium. Like normal water, tritiated water is colorless and odorless. Tritiated water behaves chemically and physically like non-tritiated water in the subsurface and therefore tritiated water will travel at the same velocity as the average groundwater velocity.

Tritium has a half-life of approximately 12.3 years. It decays.

spontaneously to helium-3 (3He). This radioactive decay releases a beta particle (low-energy electron). The radioactive decay of tritium is the source of the health risk from exposure to tritium. Tritium emits very weak radiation and leaves the body relatively quickly. Since tritium is almost always found as water it goes directly into soft tissues and organs.

The associated dose to these tissues is generally uniform and is dependent on the water content of the specific tissue.

Ill.

Program Description A

Sample Analysis This section describes the general analytical methodologies used by Teledyne Brown Engineers (TBE) to analyze the environmental samples for radioactivity for the Dresden Nuclear Power Station RGPP in 2016.

In order to achieve the stated objectives, the current program includes the following analyses:

1.

Concentrations of gamma emitters in groundwater and surface water

2.

Concentrations of strontium in groundwater

3.

Concentrations of tritium in groundwater, surface water and precipitation water

4.

Concentrations of gross alpha and gross beta in groundwater

5.

Concentrations of Am-241 in groundwater

6.

Concentrations of Cm-242 and Cm-243/244 in groundwater

7.

Concentrations of Pu-238 and Pu-239/240 in groundwater

8.

Concentrations of U-233/234, U-235 and U-238 in groundwater

9.

Concentrations of Fe-55 in groundwater

10.

Concentrations of Ni-63 in groundwater B.

Data Interpretation The radiological data collected prior to Dresden Nuclear Power Station becoming operational were used as a baseline with which these operational data were compared. For the purpose of this report, Dresden Nuclear Power Station was considered operational at initial criticality.

Several factors were important in the interpretation of the data:

1.

Lower Limit of Detection and Minimum Detectable Concentration The Lower Limit of Detection (LLD) is the minimum sensitivity value that must be achieved routinely by the analytical parameter.

2.

Laboratory Measurements Uncertainty The estimated uncertainty in measurement of tritium in environmental samples is frequently on the order of 50% of the measurement value.

Statistically, the exact value of a measurement is expressed as a range with a stated level of confidence. The convention is to report results with a 95% level of confidence. The uncertainty comes from calibration standards, sample volume or weight measurements, sampling uncertainty and other factors. Exelon reports the uncertainty of a measurement created by statistical process (counting error) as well as all sources of error (Total Propagated Uncertainty or TPU). Each result has two values calculated. Exelon reports the TPU by following the result with plus or minus +/- the estimated sample standard deviation as TPU that is obtained by propagating all sources of analytical uncertainty in measurements.

Analytical uncertainties are reported at the 95% confidence level in this report for reporting consistency with the AREOR.

Gamma spectroscopy results for each type of sample were grouped as follows:

For groundwater and surface water 14 nuclides, Be-7, K-40, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb-95, Zr-95, 1-131, Cs-134, Cs-137, Ba-140 and La-140 were reported.

C.

Background Analysis A pre-operational radiological environmental monitoring program (pre-operational REMP) was conducted to establish background radioactivity levels prior to operation of the Station. The environmental media sampled and analyzed during the pre-operational REMP were atmospheric radiation,.fall-out, domestic water, surface water, marine life, and food stuffs. The results of the monitoring were detailed in the report entitled,

. Environmental Radiological Monitoring for Dresden Nuclear Power Nuclear Power Station, Commonwealth Edison Company, Annual Report 1986, May 1987.

1.

Background Concentrations of Tritium The purpose of the following discussion is to summarize background measurements of tritium in various media performed by others. Additional detail may be found by consulting references (CRA 2006).

a.

Tritium Production Tritium is created in the environment from naturally-occurring processes both cosmic and subterranean, as well as from anthropogenic (i.e., man-made) sources. In the upper atmosphere, "Cosmogenic" tritium is produced from the bombardment of stable nuclides and combines with oxygen to form tritiated water, which will then enter the hydrologic cycle. Below ground, "lithogenic" tritium is produced by the bombardment of natural lithium present in crystalline rocks by neutrons produced by the radioactive decay of naturally abundant uranium and thorium.

Lithogenic production of tritium is usually negligible compared to other sources due to the limited abundance of lithium in rock. The lithogenic tritium is introduced directly to groundwater.

A major anthropogenic source of tritium and strontium-90 comes from the former atmospheric testing of thermonuclear weapons. Levels of tritium in precipitation increased significantly during the 1950s and* early 1960s, and later with additional testing, resulting in the release of significant amounts of tritium to the atmosphere. The Canadian heavy water nuclear power reactors, other commercial power reactors, nuclear research, and weapons production continue to influence tritium concentrations in the environment.

b.

Precipitation Data Precipitation samples are routinely collected at stations around the world for the analysis of tritium and other radionuclides. Two publicly available databases that provide tritium concentrations in precipitation are Global Network of Isotopes in Precipitation (GNIP) and USEPA's RadNet database. GNIP provides tritium precipitation concentration data for samples collected worldwide from 1960 to 2006.

RadNet provides tritium precipitation concentration data for samples collected at stations throughout the U.S. from 1960 up to and including 2006. Based on GNIP data for sample stations located in the U.S. Midwest, tritium concentrations peaked around 1963. This peak, which approached 10,000 pCi/L for some stations, coincided with the atmospheric testing of thermonuclear weapons.

Tritium concentrations in surface water showed a sharp decline up until 1975 followed by a gradual decline since that time. Tritium concentrations in Midwest precipitation have typically been below 100 pCi/L since around 1980.

Tritium concentrations in wells may still be above the 200-pCi/L detection limit from the external causes described above. Water from previous years and decades is naturally captured in groundwater, so some well water sources today are affected by the surface water from the 1960s that was elevated in tritium.

c.

Surface Water Data Tritium concentrations are routinely measured in large surface water bodies, including Lake Michigan and the Mississippi River. Illinois surface water data were typically less than 100 pCi/L.

The radio-analytical laboratory is counting tritium results to an Exelon specified LLD of 200 pCi/L. Typically, the lowest positive measurement will be reported within a range of 40 -

240 pCi/L or 140 +/- 100 pCi/L. These sample results cannot be distinguished as different from background at this concentration.

IV.

Results and Discussion Dresden Station initiated a Radiological Groundwater Protection Program (RGPP) in 2006.

A..

Groundwater Results

Groundwater Samples were collected from on-site wells throughout the year in accordance with Dresden's RGPP. Analytical results and anomalies are discussed below:

Tritium Following historic ground tritium-contamination events at Dresden Station (EN-DR-408-4160, Revision 4, Attachment 3), routine sampling and analyses continue, both inside and outside the protected areas.

Low level tritium was detected from January through December 2016 in several sampling and testing locations (Table B-1.1, AppendixB);

however, overall tritium concentrations have been trending down.

The vast majority of these locations showed a range of tritium contamination from LLD to values less than 20,000 pCi/L.

MD-11 and MW-DN-124-1 were the only 2 locations with tritium concentrations above 20,000 pCi/L. The highest level ever reached during calendar year 2016 was 419,000 pCi/L by MD-11 (sample collected on 5/23/2016).

It is important to note that wells that exceed the United States Environmental Agency (USEPA) drinking water standard (and the Nuclear Regulatory Commission Reporting Limit) of 20,000 pCi/L were due to the 2014 2/3B CST Leak. The exceedances are located within Station property, and do not serve as a drinking water source.

Strontium Samples were collected and analyzed for Sr-89 and Sr-90 activity (Table B-1.1, Appendix B). Sr-89 was not detected in any of the samples. Sr-90 was detected in 4 samples at location MW-DN-105S. The concentrations ranged from 0. 7 to 2.5 pCi/L.

Gross Alpha and Gross Beta (dissolved and suspended)

Gross Alpha and Gross Beta analyses in the dissolved and suspended fractions were performed on groundwater samples during the second quarter of 2016 (Table B-1.1, Appendix B). Gross Alpha (dissolved) was not detected at any groundwater locations. Gross Alpha (suspended) was detected in 7 groundwater locations with concentrations ranging from 1.3 to 10.5 pCi/L. Gross Beta (dissolved) was detected at 30 of the groundwater locations. The concentrations ranged from 2.4 to 33.9 pCi/L.

Gross Beta (suspended) was detected in 8 groundwater locations with concentrations ranging from 2.3 to 15.8 pCi/L. The concentrations of Gross Alpha and Gross Beta, which are slightly above detectable levels, are considered to be background and are not the result of plant effluents.

Gamma Emitters Only naturally-occurring nuclides were detected in 3 samples. No other gamma-emitting nuclides were detected (Table B-1.2, Appendix B).

Hard-Ta-Detects Hard-To-Detect analyses were performed on 3 groundwater locations to establish background levels. The analyses included Fe-55, Ni-63, Am-241, Cm-242, Cm-243/244, Pu-238, Pu-239/240, U-233/234, U-235 and U-238. U-238 was detected at 1 of the 3 groundwater monitoring locations. The concentration of U-238 was 0.24 pCi/L (Table B-1.3, Appendix B). The concentrations detected are considered background.

All other hard-to-detect nuclides were not detected at concentrations greater than their respective MDCs.

B.

Surface Water Results Surface Water Samples were collected from 9 surface water locations throughout the year in accordance with the station radiological groundwater protection program. Analytical results and anomalies are discussed belo\\(11:

Tritium Samples from all locations were analyzed for tritium activity (Table B-11.1, Appendix B). Tritium values ranged from the detection limit to 5,760 pCi/I.

The measurable concentrations of tritium are from an upstre?m source.

Strontium Samples were not analyzed for strontium activity on 2016 (Table B-11.1.

Appendix B).

Gross Alpha and Gross Beta (dissolved and suspended)

Samples were not analyzed for Gross Alpha and Gross Beta in 2016.

Gamma Emitters No gamma-emitting nuclides were detected (Table B-11.2, Appendix B).

Hard-To-Detects Samples were not analyzed for Hard-To-Detect analyses in 2016.

C.

Precipitation Water Results Precipitation Water Samples were collected from 4 precipitation water locations throughout the year in accordance with the station radiological groundwater protection program. Analytical results and anomalies are discussed below.

Tritium Samples from 4 locations were analyzed for tritium activity (Table B-111.1, Appendix 8). Tritium was not detected in any samples.

D.

Drinking Water Well Survey No drinking water well surveys were conducted in 2016.

E.

Summary of Results - Inter-Laboratory Comparison Program Inter-Laboratory Comparison Program results for TBE are presented in theAREOR.

F.

Leaks, Spills, and Releases No leaks, spills, and releases occurred in 2016.

G.

Trends Overall, tritium concentrations are decreasing across the Station. The Station continued to implement the tritium monitoring plan with monthly/quarterly sampling of a subset of shallow and intermediate aquifer wells, sewage treatment plant water, and storm sewer water.

An elevated concentration persists in the area of the Condensate Storage Tanks (Event 20 in EN-DR-408-4160, Revision 4, Attachment 3). Two remediation wells were installed in August 2015 to pump tritiated water out of the ground, and active remediation started in December 2015.

H.

Investigations No investigations performed in 2016.

I.

Actions Taken

1.

Compensatory Actions None.

2.

Actions to Recover/Reverse Plumes In August 2015, two remediation wells were installed by the CSTs.

The intent is to pump tritiated water out of the ground. The water is processed through the liquid radwaste system. Active remediation was initiated in December 2015. Remediation continued through 2016.

TABLE A-1:

Site CBG DSP-105 DSP-106 DSP-107 DSP-108 DSP-117 DSP-121 DSP-122 DSP-123 DSP-124 DSP-125 DSP-126 DSP-147 DSP-148 DSP-149R DSP-150 DSP-151 DSP-152 DSP-153 DSP-154 DSP-156 DSP-157-1 DSP-157-M DSP-157-S DSP-158-1 DSP-158-M DSP-158-S DSP-159-1 DSP-159-M DSP-159-S MW-DN-101-1 MW-DN-101-S MW-DN-102-1 MW-DN-102-S MW-DN-103-1 MW-DN-103-S MW-DN-104-S MW-DN-105-S MW-DN-106-S MW-DN-107-S MW-DN-108-1 MW-DN-109-1 MW-DN-109-S MW-DN-110-1 MW-DN-110-S MW-DN-111-S MW-DN-112-1 MW-DN-112-S MW-DN-113-1 MW-DN-113-S MW-DN-114-1 MW-DN-114-S MW-DN-115-1 MW-DN-115-S MW-DN-116-1 MW-DN-116-S MW-DN-117-1 MW-DN-118-S MW-DN-119-1 MW-DN-119-S MW-DN-120-1 MW-DN-120-S Radiological Groundwater Protection Program - Sampling Locations, Dresden Nuclear Power Station, 2016 Site Type Storm Sewer Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Location 1 O feel west of RP Office 30 feet east of the east wall of the EM Shop 65 feet east of east wall of EM Shop 9 feet east of the east Unit 1 Fuel Pool wall 40 ft east of the Unit 1 Sphere Northeast of Unit 1 Sphere; 825 feet west of Ross Bridge 72 feet north of 2/3 Intake Canal fence 50 feet north of the Radwaste Tank Farm Northeast comer of the Unit 1 Off-gas Building 9 feet south of Floor Drain Collector Tank Northeast comer of the Unit 2/3A CST 21 feet northwest of the northwest bend in road behind Training Building 325 feet west of Telemetry Bridge 130 feet southeast of the Flow Regulating Station building 35 feet south by southwest of the 138 KV yard fence 85 feet east of the northeast comer of the Unit 1 Spent Fuel Pool pad 65 feet north of the northeast comer of the Storeroom 21 o feet south by southeast of the southeast comer of Maintenance Garage 150 feet east of the southeast comer of liquid hydrogen tank farm fence 33 feet west of the track; 165 feet east of the Security Checkpoint 70 feet east by northeast of the northwest comer of 138 KV yard fence 25 feet south of the south edge of the Employee Parking lot 25 feet south of the south edge of the Employee Parking lot 25 feet south of the south edge of the Employee Parking lot 53 feet west of the Kankakee River; 33 feet west of the cinder track 53 feet west of the Kankakee River; 33 feet west of the cinder track 50 feet west of the Kankakee River; 33 feet west of the cinder track 250 feet west of the Thorsen house; 450 ft south of the plant access gate 250 feet west of the Thorsen house; 450 ft south of the plant access gate 251 feet west of the Thorsen house; 450 ft south of the plant access gate 60 feet north of the Unit 1 Diesel Fuel Storage 60 feet north of the Unit 1 Diesel Fuel Storage 12 feet south of the southeast comer of the MUDS Building 13 feet south of the southeast comer of the MUDS Building 280 feet west of the northwest comer of N-GET Building 281 feet west of the northwest comer of N-GET Building 50 feet north of Radwaste Tank Farm 65 feet north of the northeast comer of the Storeroom 75 feet north of the 2/3 Intake Canal fence; east of the Unit 1 Intake Canal 15 feet west by southwest of the Unit 1 CST 7 feet southwest of the southwest comer of the Unit 1 Cribhouse 8 feet north of Chemistry Building 8 feet north of Chemistry Building 25 feet west of the Waste Water Treatment (WWT) Building 25 feet west of the Waste Water Treatment (WWT) Building 9 feet east of the Floor Drain Collector Tank 100 feet south of the Chemistry Building 100 feet south of the Chemistry Building 90 feet west of the southwest comer of the Administration Building 91 feet west of the southwest comer of the Administration Building 50 feet east of the Unit 1 Clean Demineralized Water Tank 8 feet southwest of the Radiation protection Dept west access doors 11 feet south of Instrument Maintenance Shop 12 feet south of Instrument Maintenance Shop 75 feet south of the Calgon Building roll-up door 75 feet south of the Calgon Building roll-up door 35 feet east by northeast of the Unit 1 Stack Southeast comer of the Unit 1 Fuel Pool 20 feet east by northeast of the Unit 1 Sewage Ejector Building 21 feet east by northeast of the Unit 1 Sewage Ejector Building 45 feet north by northeast of the Ross Bridge railing 46 feet north by northeast of the Ross Bridge railing A-1

TABLE A-1:

Radiological Groundwater Protection Program - Sampling Locations, Dresden Nuclear Power Station, 2016 Site MW-DN-121-S MW-DN-122-1 MW-DN-122-S MW-DN-123-1 MW-DN-123-S MW-DN-124-1 MW-DN-124-S MW-DN-125-S MW-DN-126-S MW-DN-127-S MW-DN-134-S MW-DN-135-S MW-DN-136-S MW-DN-137-S MW-DN-140-S MW-DN-141-S MD-11 DSP-131 DSP-132 DSP-133 SW-DN-101

SW-DN-102 SW-DN-103 SW-DN-104 SW-DN-105 SW-DN-106 2/3 Discharge Hot Canal Level 2/3 Cribhouse Cold Canal Level Unit 1 Cribhouse Intake Level.

FW-1 FW-2 FW-3 FW-4 FW-5 FW-6 FW-7 FW-8 FW-9 FW-10 FW-11 FW-12 Site Type Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Sample Location Surface Water Surface Water Surface Water Surface Water Surface Water Surface Water Surface Water Surface Water Surface Water Surface Water Surface Water Surface Water Precipitation Precipitation Precipitation Precipitation Precipitation Precipitation Precipitation Precipitation Precipitation Precipitation Precipitation Precipitation Location 7 feet west of the dirt road; 42 feet east of the 345KV yard fence 150 feet north of Collins Road; northeast of the G. E. Fuel Storage Facility 150 feet north of Collins Road; northeast of the G.E. Fuel Storage Facility 400 feet west of the Thorsen house; west of the Cold Canal 400 feet west of the Thorsen house; west of the Cold Canal 10 feet south of the liquid nitrogen inerting tanks 1 O feet south of the liquid nitrogen inerting tanks 40 feet east of 2/3 B CST 15 feet south of fence around Unit 2/3 A CST and B CST (outside of fence) 20 feet south of Unit 3 HRSS 20-ft North of Mausoleum Building 20-ft East of Mausoleum Building 14.5-ft South of Mausoleum Building 20-ft West of Mausoleum Building East of MW-DN-104S at SW corner outside of 2/3 crib house North of 'A' Waste Tank next to 2/3 main chimney Piping located between Condensate Storage Tanks.

Storm water - 35 ft NE of the Unit 2/3 heating boiler 150,000 gallon diesel fuel storage tank 15 ft W of the hot canal fence - underneath Security Block Storm water - 150 ft NE of the Unit 1 Sphere. The sewer is in the middle of the road with a solid cover (no slots). There are two other sewers in the vicinity with solid covers on them, but both have the word "SANITARY" on the cover. The sewer is 66 ft SE of the Unit 1 diesel fuel transfer shed.

Storm water ditch north of Pre-Access Facility Unit 2/3 Intake (DSP50) at the Ross Bridge Unit 2/3 Discharge (DSP20) at the Telemetry Bridge Unit 2/3 Return Canal at the Discharge to the Intake Canal Cold Canal (DSP34A) at the Cooling Tower walkway bridge Hot Canal (DSP34B) at the Cooling Tower walkway bridge Cooling Pond - Pool 11 at the east side of the Covered Bridge 2/3 Discharge Hot Canal Headworks 2/3 Cribhouse Unit 1 Cribhouse 40 feet southwest of Unit 2/3 Off-gas Filter Building access door; north end of guardrail 50 feet East of Chem Feed Trailer South of Stock Truck Bay rollup door Southeast corner of Unit 3 RB Interlock East of Unit 2/3 Intake Ross barrier North of Unit 1 Chimney Southeast of Unit 2 TB Trackway Southwest corner of 2/3 CST on fence South of MUDS Building on Security fence At the fence at the northwest corner of the SBO Building 30 feet east of the east wall of the EM shop; at the stanchion for RGPP well DSP-105 60 feet southeast of the southwest corner of the Admin Building; on the security fence A-2

Intentionally left blank

_J

APPENDIX B DATA TABLES

TABLE B-1.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA, AND GROSS BETA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2016 RESULTS IN UNITS OF PCl/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 Sr-89 Sr-90 Gr-A (Dis)

Gr-A (Sus)

Gr-B (Dis)

Gr-B (Sus)

CBG 05/23/16 13200 +/- 1370 DSP-105 02/12/16 212 +/- 124 DSP-105 02/12/16 Original 194 +/- 125 DSP-105 02/12/16 Reanalysis 229 +/- 121 DSP-105 06/01/16

< 176

< 8.3

< 0.6

< 2.5

< 0.6 7.5 +/- 1.5

< 1.4 DSP-105 08/22/16

< 181 DSP-105 10/12/16

< 194 DSP-106 02/12/16 1900 +/- 254 DSP-106 06/01/16 1750 +/- 236

< 8.8

< 0.7

< 1.8

< 0.6 5.6 +/- 1.2

< 1.4 DSP-106 08/22/16 1820 +/- 244 DSP-106 10/12/16 1650 +/- 224 DSP-107 02/12/16 2670 +/- 328 DSP-107 05/31/16 Original 1980 +/- 258

< 6.4

< 0.7

< 2.7 1.9 +/- 0.9 3.8 +/- 1.4

< 2.8 DSP-107 05/31/16 Recount 2.8 +/- 1.6 DSP-107 08/22/16 2020 +/- 265 DSP-107 10/12/16 1930 +/- 260 DSP-108 02/11/16 711 +/- 147 DSP-108 06/01/16 567 +/- 135

< 6.4

< 0.7

< 3.0

< 0.6 15.7 +/- 2.0

< 1.4 DSP-108 08/22/16 481 +/- 131 DSP-108 10/12/16 524 +/- 145 DSP-122 02/09/16 1230 +/- 192 DSP-122 05/27/16 668 +/- 140 DSP-122 08/18/16 526 +/- 136 DSP-122 10/10/16 666 +/- 152 DSP-123 02/11/16 1310 +/- 201 DSP-123 05/31/16 1180 +/- 182

< 4.6

< 0.8

< 2.6

< 0.6 16.9 +/-* 2.0

.* < 1.4 DSP-123 08/18/16 959 +/- 165 DSP-123 10/11/16 1130 +/- 185 DSP-124 02/15/16 1800 +/- 246 DSP-124 05/26/16 1610 +/- 224 DSP-124 08/16/16 1990 +/- 260 DSP-124 10/18/16 1910 +/- 258 DSP-125 02/15/16 1060 +/- 175 DSP-125 05/23/16 798 +/- 166 DSP-125 06/17/16 520 +/- 140

< 7.8

< 0.6

< 12.6 2.9 +/- 1.1 25.9 +/- 4.5

< 3.8 DSP-125 08/15/16 562 +/- 136 DSP-125 10/13/16 493 +/- 145 DSP-126 05/31/16

< 179 DSP-132 05/31/16 4700 +/- 524 DSP-147 05/30/16

< 180 DSP-148 02/16/16 248 +/- 132 DSP-148 06/02/16

< 183 DSP-148 08/23/16

< 180 DSP-148 10/18/16

< 194 DSP-149R 02/16/16 474 +/- 145 DSP-149R 06/02/16 394 +/- 130 DSP-149R 08/23/16 459 +/- 131 DSP-149R 10/18/16 439 +/- 142 DSP-150 02/12/16

< 200 DSP-150 05/31/16

< 177 DSP-150 08/22/16

< 175 DSP-150 10/12/16

< 196 DSP-151 02/08/16

< 192 DSP-151 06/01/16

< 175 DSP-151 08/18/16

< 180 DSP-151 10/12/16

< 195 DSP-154 05/30/16

< 185 DSP-156 02/16/16

< 200 DSP-156 06/02/16

< 182 DSP-156 08/23/16

< 178 DSP-156 10/18/16

< 195 DSP-157-S 06/06/16

< 184 DSP-157-M 06/06/16

< 183 DSP-159-S 06/07/16

< 181 DSP-159-M 06/07/16 193 +/- 120 B-1

TABLE B-1.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA, AND GROSS BETA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2016 RESULTS IN UNITS OF PC I/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 Sr-89 Sr-90 Gr-A (Dis)

Gr-A (Sus)

Gr-B (Dis)

Gr-B (Sus)

MD-11 05/23/16 419000 +/- 40700 MD-11 10/13/16 287000 +/- 28300

< 4.2

< 0.4

< 1.2

< 0.8 23.0 +/- 1.5

< 1.6 MW-DN-101-1 02/11/16 583 +/- 148 MW-DN-101-1.

05/31/16 584 +/- 136

< 5.2

< 0.4

< 3.1

< 1.0 12.4 +/- 1.9

< 2.6 MW-DN-101-1 08/18/16 577 +/- 138 MW-DN-101-1 10/11/16 594 +/- 149 MW-DN-101-S 02/11/16

< 197 MW-DN-101-S 05/31/16

< 176

< 2.8

< 0.3

< 8.7

< 3.4 9.9 +/- 5.7 5.5 +/- 2.5 MW-DN-101-S 08/18/16

< 176 MW-DN-101-S 10/11/16

< 194 MW-DN-102-1 02/15/16

< 197 MW-DN-102-1 05/24/16

< 181

< 5.3

< 0.5

< 2.6

< 0.4 2.4 +/- 1.2

< 1.6 MW-DN-102-1 08/16/16

< 176 MW-DN-102-1 10/17/16

< 197 MW-DN-102-S 02/15/16

< 198 MW-DN-102-S 05/24/16

< 183

< 3.6

< 0.4

< 51.8

< 5.0 30.6 +/- 13.7

< 7.2 MW-DN-102-S 08/16/16

< 177 MW-DN-102-S 10/17/16

< 194 MW-DN-103-1 06/06/16

< 181 MW-DN-103-S 06/06/16

< 183 MW-DN-104-S 02/09/16 236 +/- 131 MW-DN-104-S 05/27/16

< 193 MW-DN-104-S 08/18/16

< 181 MW-DN-104-S 10/10/16 300 +/- 133 MW-DN-105-S 02/08/16 Original

< 197

< 7.7 1.9 +/- 0.8 MW-DN-105-S 02/08/16 Recount 2.5 +/- 0.4 MW-DN-105-S 06/01/16

< 190

< 3.6

< 0.4 MW-DN-105-S 08/18/16

< 179

< 4.6 1.1 +/- 0.4 MW-DN-105-S 10/12/16

< 195

< 4.5 0.7 +/- 0.3 MW-DN-105-S 04/12/16 2.5 +/- 0.7 MW-DN-106-S 06/02/16

< 182 MW-DN-107-S 02/12/16

< 199 MW-DN-107-S 05/23/16 310 +/- 127 MW-DN-107-S 08/15/16 181 +/- 119 MW-DN-107-S 10/13/16

< 200 MW-DN-108-1 02/11/16

< 197 MW-DN-108-1 05/27/16 Original

< 184

< 6.0

< 0.6

< 2.2 3.9 +/- 1.6 11.6 +/- 1.6 15.8 +/- 2.4 MW-DN-108-1 05/27/16 Recount 4.5 +/- 2.6 15.0 +/- 3.3 MW-DN-108-1 08/17/16

< 180 MW-DN-108-1 10/10/16

< 193 MW-DN-109-1 02/08/16 518 +/- 144 MW-DN-109-1 02/08/16 Original 422 +/- 134 MW-DN-109-1 02/08/16 Reanalysis 470 +/- 134 MW-DN-109-1 05/26/16 417 +/- 129

< 5.0

< 0.5

< 4.3

< 0.4 10.9 +/- 1.7

< 1.5 MW-DN-109-1 08/17/16

< 183 MW-DN-109-1 10/10/16 504 +/- 144 MW-DN-109-S 02/08/16

< 196 MW-DN-109-S 05/26/16

< 179

< 2.8

< 0.3

< 6.5

< 2.1 14.0 +/- 4.7

< 3.7 MW-DN-109-S 08/17116

< 177 MW-DN-109-S 10/10116 220 +/- 129 MW-DN-110-1 02/09/16

< 188 MW-DN-110-1 05126/16

< 183 MW-DN-110-1 08117116

< 179 MW-DN-110-1 10110/16 218 +/- 132 MW-DN-110-1 10/10116 Original 240 +/- 127 MW-DN-110-1 10110116 Reanalysis 231 +/- 125 MW-DN-110-S 02109116

< 193 MW-DN-110-S 05/26/16

< 179 MW-DN-110-S 08117116

< 180 MW-DN-110-S 10110116

< 192 MW-DN-111-S 02/15116 472 +/- 120 MW-DN-111-S 02115116 Original 346 +/- 135 MW-DN-111-S 02115116 Reanalysis 316 +/- 125 MW-DN-111-S 05/26/16 599 +/- 139 MW-DN-111-S 08/16/16 Original 256 +/- 122 8-2

TABLE B-1.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA, AND GROSS BETA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2016 RESULTS IN UNITS OF PCl/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 Sr-89 Sr-90 Gr-A (Dis)

Gr-A (Sus)

Gr-B (Dis)

Gr-B (Sus)

MW-DN-111-S 08/16/16 Reanalysis 381 +/- 118 MW-DN-111-S 10/18116 323 +/- 134 MW-DN-112-1 02/08/16

< 193 MW-DN-112-1 05/26/16

< 179 MW-DN-112-1 08/16/16

< 181 MW-DN-112-1 10/18/16

< 196 MW-DN-112-S 02/08/16

< 191 MW-DN-112-S 05126/16

< 185 MW-DN-112-S 08/16/16

< 180 MW-DN-112-S 10/18116

< 191 MW-DN-113-1 02/12116 820 +/- 146 MW-DN-113-1 02/12116 Original 636 +/- 209 MW-DN-113-1 02/12/16 Reanalysis 537 +/- 135 MW-DN-113-1 05/24/16 Original

< 181

< 4.6

< 0.3

< 8.9 9.7 +/- 2.5 18.3 +/- 5.6 9.0 +/- 2.6 MW-DN-113-1 05/24/16 Recount 10.5 +/- 2.2 8.8 +/- 2.7 MW-DN-113-1 08/16/16

< 182 MW-DN-113-1 10/17/16

< 195 MW-DN-113-S 02112/16

< 186 MW-DN-113-S 05/24/16 Original

< 184

< 5.6

< 0.5

< 3.0 6.7 +/- 2.3

< 3.9 8.0 +/- 2.6 MW-DN-113-S 05/24/16 Recount 9.0 +/- 2.1 8.5 +/- 2.5 MW-DN-113-S 08/16/16

< 183 MW-DN-113-S 10/17/16

< 195 MW-DN-114-1 02/08116 11700 +/- 1220 MW-DN-114-1 02/08/16 Original 12000 +/- 1250 MW-DN-114-1 02/08/16 Reanalysis 12800 +/- 1330 MW-DN-114-1 06/01/16 10700 +/- 1120 MW-DN-114-1 08/19/16 6370 +/- 688 MW-DN-114-1 10/13116 7350 +/- 791 MW-DN-114-S 02/08/16 2110 +/- 269 MW-DN-114-S 02/08/16 Original 2010 +/- 259 MW-DN-114-S 02/08/16 Reanalysis 2070 +/- 265 MW-DN-114-S 05/23/16 1670 +/- 233 MW-DN-114-S 08/19/16

< 185 MW-DN-114-S 10/13/16 6500 +/- 705 MW-DN-115-1 02/12/16 426 +/- 135 MW-DN-115-1 05/24/16 460 +/- 133 MW-DN-115-1 08/22/16 219 +/- 122 MW-DN-115-1 10/13/16 439 +/- 142 MW-DN-115-S 02/12/16

< 192 MW-DN-115-S 05/24/16

< 180 MW-DN-115-S 08/22/16

< 170 MW-DN-115-S 10/13/16

< 193 MW-DN-116-1 02/09/16 281 +/- 130 MW-DN-116-1 05/31/16 756 +/- 149

< 4.2

< 0.4

< 3.8 0.4 18.0 +/- 2.0

< 1.5 MW-DN-116-1 08/17/16 237 +/- 116 MW-DN-116-1 10/11/16 230 +/- 128 MW-DN-116-S 02/09/16 195 +/- 125 MW-DN-116-S 05/31/16

< 180

< 3.9

< 0.4

< 4.8 0.7 18.3 +/- 2.0

< 2.1 MW-DN-116-S 08/17/16 188 +/- 114 MW-DN-116-S 10/11/16 199 +/- 128 MW-DN-117-1 02/11/16

< 187 MW-DN-117-1 10/11/16

< 196 MW-DN-118-S 02/12/16 346 +/- 133 MW-DN-118-S 05/31/16 378 +/- 129

< 2.5

< 0.3

< 4.8 0.9 13.2 +/- 1.9

< 1.4 MW-DN-118-S 08/22/16 245 +/- 113 MW-DN-118-S 10/12/16 222 +/- 131 MW-DN-119-1 02/11/16

< 191 MW-DN-119-1 06/01/16

< 180

< 2.2

< 0.3

< 4.4 0.9 21.6 +/- 2.2

< 1.4 MW-DN-119-1 08/19/16

< 166 MW-DN-119-1 10/11/16 193 +/- 122 MW-DN-119-S 02/11/16

< 193 MW-DN-119-S 06/01/16

< 180

< 5.3

< 0.7

< 7.2 2.4 10.8 +/- 4.6

< 3.9 MW-DN-119-S 08/19/16

< 171 MW-DN-119-S 10/11/16

< 199 MW-DN-122-1 05/30/16

< 181 B-3

TABLE B-1.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA, AND GROSS BETA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2016 RESULTS IN UNITS OF PCl/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 Sr-89 Sr-90 Gr-A (Dis)

Gr-A (Sus)

Gr-B (Dis)

Gr-B (Sus)

MW-DN-122-S 05/30/16

< 179 MW-DN-124-1 02115/16 32000 +/- 3250 MW-DN-124-1 05/26/16 30500 +/- 3090

< 9.1

< 0.7

< 5.3 1.7 18.0 +/- 4.9

< 3.8 MW-DN-124-1 08119/16 25700 +/- 2620 MW-DN-124-1 10/17/16 29800 +/- 3020 MW-DN-124-S 02115/16 4860 +/- 540 MW-DN-124-S 05/26/16 6040 +/- 658

< 2.6

< 0.3

< 5.8 2.4 +/- 1.4 16.6 +/- 5.3 4.9 +/- 2.6 MW-DN-124-S 08i19/16 3510 +/- 408 MW-DN-124-S 10/17/16 746 +/- 158 MW-DN-125-S 02/15116

< 191 MW-DN-125-S 06107116

< 180

< 2.7

< 0.2

"< 3.6 0.7

< 2.2

< 1.7 MW-DN-125-S 08/19/16

< 167 MW-DN-125-S 10117/16

< 194 MW-DN-126-S 02/15/16 4290 +/- 491 MW-DN-126-S 05/23/16 2600 +/- 318

< 4.0

< 0.5

< 4.2 1.8

< 6.4

< 3.7 MW-DN-126-S 08115/16 351 +/- 119 MW-DN-126-S 08115/16 Original 352 +/- 124 MW-DN-126-S 08/15116 Reanalysis 334 +/- 114 MW-DN-126-S 10117116 2590 +/- 321 MW-DN-127-S 02115116 Original 1550 +/- 225 MW-DN-127-S 02115116 Reanalysis 1250 +/- 191 MW-DN-127-S 05124116 348 +/- 126

< 9.0

< 0.7

< 2.0 0.7 3.4 +/- 1.2

< 1.6 MW-DN-127-S 08/19116 880 +/- 156 MW-DN-127-S 10113116 587 +/- 149 MW-DN-134-S 02110116

< 192 MW-DN-134-S 05130116

< 171

< 2.8

< 0.3

< 4.4 0.7 9.4 +/- 1.7

< 1.6 MW-DN-134-S 08123116

< 168 MW-DN-134-S 10118116

< 198 MW-DN-135-S 02110116

< 190 MW-DN-135-S 05130/16

< 180

< 4.3

< 0.4

< 3.2 0.7 9.1 +/- 1.6

< 1.6 MW-DN-135-S 08123116

< 169 MW-DN-135-S 10118116

< 194 MW-DN-136-S 02110116

< 195 MW-DN-136-S 05130116

< 176

< 3.9

< 0.4

< 7.9 2.6

< 6.9 8.6 +/- 2.7 MW-DN-136-S 08123116

< 171 MW-DN-136-S 10118116

< 188 MW-DN-137-S 02110116

< 193 MW-DN-137-S 05130116

< 171

< 3.2

< 0.2

< 6.7 2.5 9.6 +/- 4.0

< 3.9 MW-DN-137-S 08123116

< 167 MW-DN-137-S 10118116

< 184 MW-DN-140-S 02109/16 713 +/- 147 MW-DN-140-S 05127116 492 +/- 133 MW-DN-140-S 08118116 346 +/- 120 MW-DN-140-S 10110116 399 +/- 139 MW-DN-141-S 02/09116 961 +/- 168 MW-DN-141-S 02/09116 870 +/- 157 MW-DN-141-S 05127116 1860 +/- 249

< 3.7

< 1.0

< 1.1 0.9 13.9 +/- 1.4

< 1.4 MW-DN-141-S 08117116 883 +/- 161 MW-DN-141-S 10110116 586 +/- 145 MW-DN-142-S 08123116

< 182

< 3.9

< 0.5

< 7.3 2.6 33.9 +/- 3.6 5.0 +/- 2.4 MW-DN-142-S 10114116

< 184 MW-DN-143-S 08123116

< 183

< 4.8

< 0.9

< 2.2 0.8 7.4 +/- 1.6 2.3 +/- 0.8 MW-DN-143-S 10114116

< 196 MW-DN-144-S 08123116 Original

< 180

< 4.2

< 0.5

< 4.2 1.3 +/- 0.7 22.5 +/- 2.1 7.7 +/- 0.9 MW-DN-144-S 08123116 Recount 1.9 +/- 1.0 6.3 +/- 1.7 MW-DN-144-S 10114116

< 187 B-4

OJ I

01 TABLE B-1.2 SITE DSP-105 DSP-105 DSP-105 DSP-105 DSP-106 DSP-106 DSP-106 DSP-106 DSP-107 DSP-107 DSP-107 DSP-107 DSP-108 DSP-108 DSP-108 DSP-108 DSP-123 DSP-123 DSP-123 DSP-123 DSP-125 DSP-126 DSP-147 DSP-154

, DSP-157-M DSP 157-S DSP 159-M DSP 159-S MD-11 MW-DN-101-I MW-DN-101-I MW-DN-101-I MW-DN-101-I MW-DN-101-S MW-DN-101-S MW-DN-101-S MW-DN-101-S MW-DN-102-I MW-DN-102-S MW-DN-103-I MW-DN-103-S MW-DN-106-S MW-DN-108-I COLLECTION DATE 02/12/16 06/01/16 08/22/16 10/12/16 02/12/16 06/01/16 08/22/16 10/12/16 02/12/16 05/31/16 08/22/16 10/12/16 02/11/16 06/01/16 08/22/16 10/12/16 02/11/16 05/31/16 08/18/16 10/11/16 06/17/16 05/31/16 05/30/16 05/30/16 06/06/16 06/06/16 06/07/16 06/07/16 10/13/16 02/11/16 05/31/16 08/18/16 10/11/16 02/11/16 05/31/16 08/18/16 10/11/16 05/24/16 05/24/16 06/06/16 06/06/16 06/02/16 02/11/16 Be-7

< 63

< 25

< 47

< 22

< 43

< 31

< 39

< 16

< 63

< 28

< 60

< 17

< 40

< 25

< 44

< 16

< 57

< 23

< 15

< 16

< 63

< 15

< 12

< 15

< 38

< 32

< 33

< 40

< 17

< 31

< 17

< 15

< 41

< 17

< 23

< 15

< 12

< 9

< 35

< 39

< 30

< 47 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2016 RESULTS IN UNITS OF PCl/LITER +/- 2 SIGMA K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 I-131 Cs-134 Cs-137 Ba-140

< 70

< 7

< 19

< 2

< 35

< 5

< 14

< 2

< 117

< 7

< 67

< 3

< 92

< 4

< 26

< 1

< 58

< 6

< 63

< 3

< 137

< 6

< 12

< 1

< 41

< 5

< 49

< 2

< 42

< 4

< 13

< 1

< 122

< 7

< 24

< 2

< 29

< 2

< 14

< 1

< 151

< 7

< 26

< 1

< 9

< 1

< 35

< 1

< 35

< 4

< 85

< 4

< 34

< 4

< 30

< 4 44+/-27

<2

< 66

< 3

< 14

< 2

< 33

< 2

< 12

< 1

< 95

< 5

< 15

< 2

< 21

< 3

< 32

< 1

< 9

< 1

< 5

< 1

< 70

< 4

< 38

< 4

< 29

< 3

< 42

< 5

< 6

< 3

< 6

< 2

<7

< 3

< 5

< 2

< 7

<4

< 8

<2

< 5

< 3

< 5

<2

< 5

<2

< 2

< 9

< 2

< 1

< 2

<4

< 4

<4

< 2

< 3

< 2

< 1

< 5

< 2

< 3

<2

< 1

<4

< 3

<4

< 15

< 6

< 14

< 4

< 14

<7

< 9

< 3

< 16

< 8

< 16

<4

< 10

<6

< 11

< 3

< 11

< 6

<4

< 22

< 4

< 3

< 4

< 11

< 8

<7

< 8

<4

< 8

< 4

<4

< 10

< 5

<6

<4

< 3

< 2

< 10

< 8

< 11

<5

<2

<5

<2

<6

<3

<5

< 1

< 7

< 3

< 7

< 1

< 5

< 2

< 5

< 1

<7

<2

< 1

<2

< 1

<4

<3

<4

<2

<3

<2

< 1

<4

<2

< 3

< 1

<4

< 3

<4

< 13

< 5

< 11

<4

< 13

< 6

< 10

< 3

< 13

< 6

< 12

<3

< 8

<5

< 10

< 3

< 12

< 5

<3

< 3

< 17

< 3

< 2

< 7

< 8

< 3

< 5

< 3

<3

< 10

< 3

<. 5

<3

< 2

< 1

<8

< 8

<6

< 8

< 5

< 2

<4

< 2

<6

< 3

< 5

<2

< 7

<4

< 7

<2

< 6

< 3

< 5

<2

< 4

< 3

< 2

< 8

< 2

< 1

<2

<4

< 5

<2

<4

<2

< 5

<2

< 3

<2

< 1

<4

< 5

<4

< 5

< 8

<4

< 9

<4

< 11

< 5

< 8

< 3

< 10

< 6

< 12

< 3

< 8

< 5

< 9

< 3

< 14

< 5

< 3

< 12

< 3

<2

< 3

< 8

< 7

<7

< 7

< 3

< 6

< 3

< 8

< 3

< 5

< 3

< 2

<7

<6

< 9

< 15

< 12

< 14

< 15

< 13

< 12

< 15

< 14

< 15

< 10

< 11

< 14

< 11

< 8

< 14

< 15

< 14

< 15

< 14

< 15

< 9

< 10

< 9

< 15

< 11

< 15

< 14

< 15

< 12

< 5

< 2

<6

< 2

<5

<3

<4

< 1

<8

<3

<6

< 1

< 5

<2

<4

< 1

<6

< 2

< 1

< 7

< 1

< 3

<3

<4

< 1

<3

<2

< 1

<4

<2

< 1

<3

<4

<3

<4

< 6

<2

< 6

<2

<6

< 3

< 5

< 1

< 9

< 3

<6

< 1

< 5

< 3

<5

< 1

<7

<2

< 1

< 8

< 1

<4

<2

< 3

<2

< 1

<4

<2

< 1

<4

< 3

< 5

< 35

< 21

< 29

< 23

< 32

< 25

< 24

< 20

< 44

< 27

< 40

< 20

< 24

< 22

< 25

< 20

< 36

< 23

< 15

< 21

< 35

< 21

< 18

< 22

< 31

< 28

< 27

< 31

< 22

< 19

< 18

< 16

< 20

< 25

< 18

< 23

< 21

< 17

< 16

< 31

< 32

< 29

< 32 La-140

< 13

<7

< 10

<6

< 10

< 9

<6

< 13

< 10

< 12

< 7

<8

<7

< 9

<6

< 11

< 8

<4

<7

< 10

< 7

< 5

< 8

< 10

< 11

< 8

< 9

<7

<6

< 5

<6

< 11

< 6

< 8

<6

<5

<4

< 11

<8

< 11

< 9

OJ I a>

TABLE B-1.2 SITE MW-DN-108-1 MW-DN-108-1 MW-DN-108-1 MW-DN-109-1 MW-DN-109-S MW-DN-113-1 MW-DN-113-S MW-DN-116-1 MW-DN-116-1 MW-DN-116-1 MW-DN-116-1 MW-DN-116-S MW-DN-116-S MW-DN-116-S MW-DN-116-S MW-DN-117-1 MW-DN-117-1 MW-DN-118-S MW-DN-118-S MW-DN-118-S MW-DN-118-S MW-DN-119-1 MW-DN-119-S MW-DN-122-1 MW-DN-122-S MW-DN-124-1 MW-DN-124-1 MW-DN-124-S MW-DN-124-S MW-DN-125-S MW-DN-126-S MW-DN-127-S MW-DN-134-S MW-DN-135-S MW-DN-136-S MW-DN-137-S MW-DN-141-S MW-DN-142-S MW-DN-143-S MW-DN-144-S COLLECTION DATE 05/27/16 08/17/16 10/10/16 05/26/16 05/26/16 05/24/16 05/24/16 02/09/16 05/31/16 08/17/16 10/11/16 02/09/16 05/31/16 08/17/16 10/11/16 02/11/16 10/11/16 02/12/16 05/31/16 08/22/16 10/12/16 06/01/16 06/01/16 05/30/16 05/30/16 05/26/16 10/17/16 05/26/16 10/17/16 06/07/16 05/23/16 05/24/16 05/30/16 05/30/16 05/30/16 05/30/16 05/27/16 08/23/16 08/23/16 08/23/16 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2016 RESULTS IN UNITS OF PCl/LITER +/- 2 SIGMA Be-7 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140

<22

<40

<2

< 22

< 17

< 2

< 14

< 10

< 1

< 16

< 14

< 1

< 22

< 14

< 2

< 10

< 21

< *1 33 +/- 12

< 9

< 0

< 33

< 30

< 4

< 17

< 15

< 2

< 22

< 20

< 2

<14

<11

<1

< 34

< 63

< 3

<15

<13

<1

< 20

< 18

< 2

< 14

< 31

< 1

< 34

< 31

< 3

<15

<11

<1

< 46

< 123

< 5

< 23

< 20

< 2

< 40

< 70

< 4

<16

<13

<1

< 19

< 17

< 2

<13

<30

<1

< 15

< 37

< 1

< 16

< 41

< 1

<11

<10

<1

< 20

< 18

< 2

< 12

< 20

< 1

< 20 79 +/- 26

< 2

< 44

< 30

< 4

< 8

< 16

< 1

<11

<15

<1

<13

<34

<1

<11

<8

<1

<13

<10

<1

< 14

< 10

. < 1

<22

<48

<2

< 42

< 41

< 4

< 41

< 5

< 22

< 21

< 2

< 1

< 2

< 1

< 0

<4

< 2

< 1

< 3

< 2

< 1

< 4

< 2

< 5

< 3

<4

< 2

< 1

< 2

< 1

< 2

< 1

< 2

< 4

< 1

< 2

< 5

< 2

< 5

< 3

<4

<2

< 1

< 8

<4

< 5

< 3

< 8

< 4

< 5

< 3

< 8

<4

< 10

< 6

< 9

<4

< 5

< 3

<4

< 3

< 6

<2

<4

< 10

< 2

< 3

< 5

< 12

< 10

< 5

<2

< 2

< 1

<2

< 1

<O

<4

<2

< 1

<4

< 1

<2

< 1

<3

< 1

<5

<2

<4

< 1

<2

< 1

< 2

< 1

< 2

< 6

< 1

<2

<4

< 5

<2

< 4

< 2

< 3

<4

< 1

<7

< 3

<4

< 2

<6

< 3

<4

<2

<7

< 3

< 8

< 5

< 8

< 3

<4

< 3

< 2

<4

< 2

< 4

< 7

< 1

< 2

<2

< 3

<4

< 9

< 5

< 3

<2

< 1

<2

< 2

< 1

< 4

<2

< 4

< 2

< 1

<3

< 2

<6

< 3

< 5

<2

< 2

< 1

< 3

< 1

<2

< 5

< 1

<2

< 5

< 6

<3

< 4

<4

< 2

< 3

< 4

< 2

< 1

< 8

< 4

< 2

<7

< 3

< 4

<3

<6

< 3

< 8

<5

<7

< 3

<4

< 3

< 2

<4

<2

< 4

< 9

< 1

< 2

<2

<3

<4

< 9

<4

< 14

< 12

< 14

< 11

< 15

< 14

< 15

< 11

< 12

< 14

< 11

< 10

< 11

< 14

< 9

< 15

< 14

< 15

< 12

< 9

< 14

< 15

< 14

< 15

< 14

< 15

< 14

< 15

< 14

< 8

< 2

< 1

< 2

< 1

< 0

< 3

< 2

<2

< 1

< 4

< 1

< 2

< 1

<4

< 1

< 5

< 2

<4

< 1

< 2

< 1

<2

< 1

<2

<4

< 1

<2

<4

<2

< 1

<2

< 1

<O

<4

<2

< 1

<4

< 1

<2

< 1

<4

< 1

<5

<2

<4

< 1

<2

< 1

<2

< 1

<2

< 5

< 1

<2

< 5

<4

<2

< 23

< 20

< 19

< 17

< 23

< 17

< 14

< 26

< 19

< 21

< 23

< 16

< 19

< 22

< 21

< 30

< 24

< 29

< 22

< 21

< 16

< 21

< 20

< 19

< 24

< 19

< 22

< 32

< 17

< 18

< 17

< 18

< 21

< 23

< 31

< 30

< 16 La-140

< 8

<6

< 7

<6

<4

< 9

< 6

< 7

<6

<8

< 5

<6

<5

<6

<7

< 11

<9

< 11

<7

<6

<7

< 8

<5

< 8

<4

<5

< 9

< 5

<5

< 7

<4

<6

< 8

< 10

< 5

TABLE B-1.3 COLLECTION SITE DATE Am-241 MD-11 10/13/16

< 0.04 MW-DN-124-1 05/26/16

< 0.17 MW-DN-124-S 05/26/16

< 0.04 OJ I

CONCENTRATIONS OF HARD TO DETECTS IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2016 RESULTS IN UNITS OF PCl/LITER +/- 2 SIGMA Cm-242 Cm-243/244 Pu-238 Pu-239/240 U-233/234 U-235 U-238

< 0.06

< 0.04

< 0.11

< 0.10

< 0.06

< 0.10

< 0.12

< 0.07

< 0.08

< 0.04

< 0.13

< 0.08 0.24 +/- 0.14

< 0.04

< 0.09

< 0.16

< 0.03

< 0.06

< 0.14 Fe-55 Ni-63

< 134

< 3.1

< 168

< 3.8

< 152

< 3.2

TABLE 8-11.1 CONCENTRATIONS OF TRITIUM IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2016 RESULTS IN UNITS OF PCl/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 DSP-131 02/15/16 408 +/- 134 DSP-131 05/27/16 298 +/- 122 DSP-131 08/17/16 321 +/- 126 DSP-131 10/10/16 427 +/- 138 DSP-132 02/15/16 1870 +/- 253 DSP-132 02/15/16 Recount 2020 +/- 269 DSP-132 02/15/16 Reanalysis 1960 +/- 250 DSP-132 05/31/16 4970 +/- 550 DSP-132 08/22/16 5760 +/- 630 DSP-132 10/17/16 1770 +/- 245 DSP-133 02/10/16

< 189 DSP-133 05/30/16

< 180 DSP-133 08/23/16

< 178 DSP-133 10/18/16

< 197 SW-DN-101 02/10/16 Original

< 187 SW-DN-101 02/10/16 Reanalysis

< 185 SW-DN-101 06/02/16 882 +/- 156 SW-DN-101 08/23/16 1430 +/- 208 SW-DN-101 10/18/16 1210 +/- 185 SW-DN-102 02/10/16 368 +/- 132 SW-DN-102 06/02/16 573 +/- 132 SW-DN-102 08/23/16 413 +/- 130 SW-DN-102 10/18/16 1380 +/- 200 SW-DN-103 02/10/16 351 +/- 129 SW-DN-103 06/02/16 433 +/- 123 SW-DN-103 08/23/16 716 +/- 146 SW-DN-103 10/18/16 1380 +/- 199 SW-DN-104 02/10/16 317 +/- 130 SW-DN-104 05/30/16 390 +/- 123 SW-DN-104 08/23/16 208 +/- 122 SW-DN-104 10/18/16 1220 +/- 187 SW-DN-105 02/10/16 255 +/- 126 SW-DN-105 05/30/16 525 +/- 127 SW-DN-105 08/23/16 Original 1510 +/- 217 SW-DN-105 08/23/16 Recount 1460 +/- 208 SW-DN-105 08/23/16 Reanalysis 1480 +/- 207 SW-DN-105 10/18/16 1070 +/- 171 SW-DN-106 02/10/16 380 +/- 132 SW-DN-106 05/30/16 435 +/- 123 SW-DN-106 08/23/16

< 179 SW-DN-106 10/17/16 1190 +/- 182 8-8

OJ cb TABLE B-11.2 COLLECTION SITE DATE DSP-131 05/27/16 DSP-132 05/31/16 DSP-133 05/30/16 SW-DN-101 06/02/16 SW-DN-102 06/02/16 SW-DN-103 06/02/16 SW-DN-104 05/30/16 SW-DN-105 05/30/16 SW-DN-106 05/30/16 Be-7

< 20

< 23

< 13

< 17

< 15

< 16

< 14

< 13

< 13 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2016 RESULTS IN UNITS OF PCl/LITER +/- 2 SIGMA K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-B5 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140

< 29

<2

< 5

< 2

< 4

< 2

<4

< 13

<2

< 2

< 21

< 6

< 42

< 2

<2

< 5

< 3

< 5

< 3

< 5

< 12

< 2

<2

< 22

< 7

< 10

< 1

< 3

< 1

< 2

< 1

<2

< 15

< 1

< 20

<6

< 43

< 1

< 2

<5

< 1

<4

< 2

<4

< 14

< 1

<2

< 21

< 8

< 17

< 1

< 2

< 3

< 1

< 3

< 2

< 3

< 14

< 1

< 2

< 22

< 6

< 14

< 1

<2

<4

<2

< 3

<2

< 3

< 15

< 1

<2

< 21

< 7

< 10

< 1

< 3

< 1

< 3

< 2

<3

< 15

< 1

< 20

<6

< 22

< 1

<3

< 1

< 2

< 1

< 3

< 14

< 1

< 19

<5

<8

< 1

< 3

< 1

<2

< 1

< 2

< 14

< 1

< 18

< 4

TABLE B-111.1 CONCENTRATIONS OF TRITIUM IN PRECIPITATION WATER SAMPLES COLLECTED IN THE VICINITY OF DRESDE~ NUCLEAR POWER STATION, 2016 RESULTS IN UNITS OF PCi/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 FW-1 06/07/16

< *181 FW-10 06/01/16

< 183 FW-11 06/01/16

< :181 FW-12 06/01/16

< 182 8-10

SVPLTR 17-0024, Appendix F - Annual Radiological Groundwater Protection Program Report (Argppr)

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