ML071380248

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Annual Radiological Groundwater Protection Program Report for 2006
ML071380248
Person / Time
Site: Dresden  Constellation icon.png
Issue date: 05/31/2007
From:
Teledyne Brown Engineering Environmental Services
To:
Exelon Nuclear, NRC/FSME
References
FOIA/PA-2010-0209
Download: ML071380248 (38)
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Text

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 2006 Prepared By Teledyne Brown Engineering Environmental Services Nuclear Dresden Nuclear Power Station Norris, IL 60450 May 2007

Table Of Contents I. Sum m ary and Conclusions ................................................................................................ 1 I1. Introduction ........................................................................................................................ 2 A. Objectives of the RG PP ................................................................................... 4 B. Im plem entation of the Objectives ..................................................................... 4 C. Program Description ......................................................................................... 5 D. Characteristics of Tritium (H-3) ....................................................................... 5 Ill. Program Description ..................................................................................................... 6 A. Sam ple Analysis ................................................................................................ 6 B. Data Interpretation ........................................................................................... 6 C. Background Analysis ......................................................................................... 7

1. Background Concentrations of Tritium .................................................. 8 IV. Results and Discussion ............................................................................................... 9 A. Groundwater Results ......................................................................................... 9 B. Drinking W ater W ell Survey ............................................................................ 10 C. Summary of Results - Inter-laboratory Comparison Program ....................... 10 D. Leaks, Spills, and Releases .......................................................................... 11 E. Trends ............................................................................................................ 11 F. Investigations .................................................................................................. 11 G . Actions Taken ................................................................................................ 11

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Appendices Appendix A Location Designation Tables Table A-I: Radiological Groundwater Protection Program - Sampling Locations, Distance and Direction, Dresden Nuclear Power Station, 2006 Eigur~s Security-Related Information: Maps of the Dresden Nuclear Power Station have been withheld from public disclosure under 10CFR2.390 and N.J.S.A. 47:1A-1.1 Appendix B Data Tables Tables Table B-1.1 Concentrations of Tritium in Groundwater Samples Collected in the Vicinity of Dresden Nuclear Power Station, 2006.

Table B-1.2 Highest to Lowest Concentrations of Tritium in Groundwater Samples Collected in the Vicinity of Dresden Nuclear Power Station, 2006.

Table B-1.3 Concentrations of Strontium in Groundwater Samples Collected in the Vicinity of Dresden Nuclear Power Station, 2006.

Table B-1.4 Highest to Lowest Concentrations of Strontium in Groundwater Samples Collected in the Vicinity of Dresden Nuclear Power Station, 2006.

Table B-1.5 Concentrations of Gamma Emitters in Groundwater Samples Collected in the Vicinity of Dresden Nuclear Power Station, 2006.

Table B-1.6 Highest to Lowest Concentrations of Gamma Emitters in Groundwater Samples Collected in the Vicinity of Dresden Nuclear Power Station, 2006.

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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 (P.A.).

The Dresden power plant has experienced a number of leaks from underground lines and spills from above ground systems containing radioactive water over its 40-year history. These incidents have created a number of areas of localized contamination within the P.A. Isotopic analyses of groundwater in many of these areas show measurable concentrations of tritium (H-3). In addition, Strontium (Sr-90) was detected just above the Lower Limit of Detectability (LLD) in one of the wells within the P.A.

Dresden recently participated in a fleetwide hydrogeologic investigation in an effort to characterized groundwater movement at each site. This investigation also compiled a list of the historic spills and leaks. Combining the tritium concentration in a locally contaminated area with 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. The results of the HIR are available on:

[httpl//www. exeloncorp com/ourcompanies/powergen/nuclear/Tritium. htm].

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 P.A. Routine samples are taken from domestic water supply and 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 had 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, therefore, there are no changes to this program from previous years. 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 71 sampling points in the RGPP:

  • Dresden has 39 developed groundwater monitoring wells within the Protected Area.

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 26 developed groundwater monitoring wells outside the P.A. the majority of which form a ring just within the perimeter of the property.
  • Dresden has 6 surface water monitoring locations on the owner-controlled area sampled as part of the Dresden RGPP. These consist of one sample from 5 different canals and one sample from the cooling pond.

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 of twice per year.

During 2006, there were 529 analyses that were performed on 214 samples from 71 sample points.

Supplemental Radiological Groundwater Monitoring Program (SRGPP)

Dresden also has a Supplemental Radiological Groundwater Monitoring Program (SRGPP) that provides short-term monitoring of a limited selection of monitoring points, mostly within the P.A., intended to identity relatively rapid changes in the groundwater tritium concentrations.

In addition to the 71 sampling points in the RGPP, the SRGPP also includes sampling of 9 sentinel wells, 39 sewers and 1-trench totaling 120 possible sample 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.

Many sentinel wells were installed near a leaking underground HPCI suction line and were subsequently removed as part of the excavation and repair of that line.

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

Dresden has a trench, or storm-water ditch, that runs along the south side of the P.A.

Rainwater run-off and subsurface water to a depth of about 4 feet flows into this trench discharging into the hot canal to the west and the Kankakee River to the east. This and other trenches around the site can be sampled surface and near surface water on site.

The Dresden site-specific RGPP procedure identifies the historic 'events' that would affect the individual SRGPP 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 Dresden SRGPP in 2006 included sampling of 3 sewers and 5 sentinel wells at a frequency of approximately every two weeks.

During 2006, there were 299 analyses that were performed on 299 samples from 8 sample points.

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 SRGPP is to provide indication of short-term changes to groundwater tritium concentrations within the P.A.

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 new 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 71 developed groundwater wells and surface water sample points in the RGPP.

Dresden also has a Supplemental Radiological Groundwater Monitoring Program (SRGPP) that provides short-term monitoring of a limited selection of monitoring points mostly within the P.A. intended to identity relatively rapid changes in the groundwater tritium concentrations. In addition to the 71 sampling points in the RGPP, the SRGPP also includes sampling of 9 sentinel wells, 39 sewers and 1-trench totaling 120 possible sample points.

1. Sample Collection Sample locations can be found in Table A-1 and Figures A-1 and A-2, Appendix A.

Groundwater and Surfarce Water Water samples are collected in accordance with the schedule delineated in the Dresden site-specific RGPP and SRGPP 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-7 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 is one of the least dangerous radionuclides because it 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.

III. Program Description A. Sample Analysis This section describes the general analytical methodologies used by Teledyne Brown Engineers (TBE) and Environmental Incorporated Midwest laboratories (EIML) to analyze the environmental samples for radioactivity for the Dresden Nuclear Power Station RGPP in 2006.

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 and surface water.
3. Concentrations of tritium in groundwater and surface water.

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 specified by federal regulation as a 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 11 nuclides, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb-95, Zr-95, 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 foodstuffs. 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 world wide from 1960 to 2006.

RadNet provides tritium precipitation concentration data for samples collected at stations through out 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 has initiated a Radiological Groundwater Protection Program (RGPP) in 2006.

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

Tritium Of the 39 developed groundwater-monitoring wells inside the Protected Area, 28 wells show some level of tritium contamination ranging from just above LLD to 150,000 pCi/L.

Of the 26 developed groundwater-monitoring wells outside the Protected Area, 2 wells show tritium contamination just above LLD. One of these wells is located near the radwaste discharge line (about 200 yards north of the plant) that ruptured in 1999. The other well is about 1500 feet south of the Security Check point adjacent to the hot canal that had measurable concentrations of tritium from an upstream source for several years prior to 2006.

Strontium-90 was detected in one well MW-DN-1081. The result of seven analyses averaged 3.4 pCi/L. This is attributed to a release from a Unit 1 off-gas line in November of 1975.

Gamma Emitters and Strontium Potassium-40 was detected in 33 of 197 samples. The concentrations ranged from 36 pCi/liter to 332 pCi/liter. Cobalt-60 was detected on one sample at a concentration of 4 pCi/liter. No other gamma emitting nuclides were detected. (Table B-1.5 and B-1.6, Appendix B).

B. Drinking Water Well Survey A drinking water well survey was conducted during the summer 2006 by CRA (CRA 2006) around the Dresden Nuclear Power Station.

C. Summary of Results - Inter-Laboratory Comparison Program Inter-Laboratory Comparison Program results for TBE and Environmental Inc. (Midwest Labs) are presented in the AREOR.

D. Leaks, Spills, and Releases In the summer of 2004 elevated tritium concentrations were identified in sentinel wells by the HPCI suction line near the HPCI room. This line was found leaking and about one-half of the line was excavated and replaced.

In January of 2006 there was an increase in tritium concentration in two sentinel wells near the HPCI suction line adjacent to the 2/3B Contaminated Storage Tank (2/3B CST). This suggested that the other half of the HPCI suction line was leaking. The line was excavated and pressure tested. It was determined that this line was not leaking. The line did show some indications of degradation and as a result, this half of the line was replaced.

There was no other incidence of a leak, spill or release in 2006.

E. Trends The leak from the HPCI line in 2004 left an area of tritium contamination near the excavation site. The plume from this event was predicted to travel west then north around the foundation of the Reactor Building toward the Cribhouse intake structure.

The groundwater monitoring well just south of the Floor Drain Surge Tank has shown an increasing trend of tritium concentration. It is believed that the plume from the 2004 HPCI line leak has produced this increasing trend.

F. Investigations Two new groundwater-monitoring wells were installed in late 2006 with the intent of intercepting the highest concentration of the plume from the 2004 HPCI line leak. As expected, the results of these two wells showed tritium concentration of approximately 120,000 pCi/I and approximately 100,000 PCi/L. These wells are located just south of the liquid nitrogen storage tanks.

G. Actions Taken

1. Compensatory Actions No compensatory actions were taken as a result of the RGPP in 2006.
2. Installation of Monitoring Wells As discussed above, two new groundwater-monitoring wells (DN-MW-124-1 and 124-S) were installed just south of the liquid nitrogen storage tanks in late 2006. This action was taken to further quantify the plume movement of the 2004 HPCI leak.

Dresden Station has implemented a program to assess the condition of underground lines within the Protected Area. The first lines will be unearthed for testing in the summer of 2007. The results of the RGPP have influenced the priority of the lines being tested.

No other actions were taken with the sample results from the RGPP.

3. Actions to Recover/Reverse Plumes No actions were taken by Dresden Station if an effort to reverse plume movement.

APPENDIX A LOCATION DISTANCE

APPENDIX A LOCATION DISTANCE

TABLE A-I: Radiological Groundwater Protection Program - Sampling Locations and Distances, Dresden Nuclear Power Station, 2006 Site Site Type Temporary/Permanent Distance DSP-105 Monitoring Well DSP-106 Monitoring Well DSP-107 Monitoring Well DSP-108 Monitoring Well DSP-1 17 Monitoring Well DSP-118 Monitoring Well DSP-121 Monitoring Well DSP-122 Monitoring Well DSP-123 Monitoring Well DSP-124 Monitoring Well DSP-125 Monitoring Well DSP-126 Monitoring Well DSP-127 Monitoring Well DSP-147 Monitoring Well DSP-148 Monitoring Well DSP-149 Monitoring Well DSP-150 Monitoring Well DSP-151 Monitoring Well DSP-152 Monitoring Well DSP-153 Monitoring Well DSP-154 Monitoring Well DSP-155 Monitoring Well DSP-156 Monitoring Well DSP-157M Monitoring Well DSP-157S Monitoring Well DSP-158 Monitoring Well DSP-158M Monitoring Well DSP-158S Monitoring Well DSP-159 Monitoring Well DSP-159M Monitoring Well DSP-159S Monitoring Well MW-DN-1011 Monitoring Well MW-DN-101S Monitoring Well MW-DN-1021 Monitoring Well MW-DN-102S Monitoring Well MW-DN-1031 Monitoring Well MW-DN-103S Monitoring Well MW-DN-104S Monitoring Well MW-DN-105S Monitoring Well MW-DN-106S Monitoring Well MW-DN-107S Monitoring Well MW-DN-1081 Monitoring Well MW-DN-1091 Monitoring Well MW-DN-109S Monitoring Well MW-DN-1101 Monitoring Well MW-DN-111S Monitoring Well MW-DN-1 11 S Monitoring Well MW-DN-1121 Monitoring Well A-1

TABLE A-i: Radiological Groundwater Protection Program - Sampling Locations and Distances, Dresden Nuclear Power Station, 2006 Site Site Type Temporary/Permanent Distance MW-DN-1 12S Monitoring Well MW-DN-1 131 Monitoring Well MW-DN-1 13S Monitoring Well MW-DN-1 141 Monitoring Well MW-DN-1 14S Monitoring Well MW-DN-1 151 Monitoring Well MW-DN-115S Monitoring Well MW-DN-1161 Monitoring Well MW-DN-116S Monitoring Well MW-DN-1 171 Monitoring Well MW-DN-1 18S Monitoring Well MW-DN-1 191 Monitoring Well MW-DN-1 19S Monitoring Well MW-DN-1201 Monitoring Well MW-DN-120S Monitoring Well MW-DN-121S Monitoring Well MW-DN-1221 Monitoring Well MW-DN-122S Monitoring Well MW-DN-1231 Monitoring Well MW-DN-123S Monitoring Well SW-DN-101 Surface Water SW-DN-102 Surface Water SW-DN-103 Surface Water SW-DN-104 Surface Water SW-DN-105 Surface Water SW-DN-106 Surface Water SW-DN-107 Surface Water DSP-124 Sewer DSP-131 Sewer DSP-132 Sewer W-2R Sentinel Well W-3 Sentinel Well T-6 Sentinel Well R1 Sentinel Well E-7 Sentinel Well A-2

Intentionally left blank APPENDIX B DATA TABLES

TABLE B-I.1 CONCENTRATIONS OF TRITIUM IN GROUNDWATER SAMPLES COLLECTED INTHE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE DSP-105 05/23/06 319 +/- 117 DSP-105 ORIG 10/20/06 428 +/- 121*

DSP-105 RERUN 10/20/06 302 +/- 123*

DSP-106 05/23/06 2370 +/- 289 DSP-106 ORIG 10/20/06 2210 +/- 276*

DSP-106 RERUN 10/20/06 1910 +/- 285*

DSP-107 05/23/06 9820 +/- 1030 DSP-107 ORIG 10/24/06 5570 +/- 613*

DSP-107 RERUN 10/24/06 5400 +/- 629*

DSP-107 ORIG 10/24/06 5100 +/- 586*

DSP-107 RERUN 10/24/06 5350 +/- 321*

DSP-1 08 05/24/06 1930 +/- 244 DSP-108 ORIG 10/24/06 2190 +/- 271" DSP-108 RERUN 10/24/06 1780 +/- 271*

DSP-117 05/26/06 < 165 DSP-117 10/23/06 < 147

  • DSP-118 05/25/06 < 166 DSP-1 18 10/20/06 191 +/- 108" DSP-121 05/26/06
  • 165 DSP-121 10/20/06
  • 145
  • DSP-122 05/25/06 1440 +/- 139 DSP-122 ORIG 10/24/06 2480 +/- 300*

DSP-122 RERUN 10/24/06 2400 +/- 335*

DSP-123 05/26/06 13100 +/- 318 DSP-123 05/26/06 13200 +/- 319 DSP-123 ORIG 10/24/06 14000 +/- 1470*

DSP-123 RERUN 10/24/06 14900 +/- 1570" DSP-123 ORIG 10/24/06 13600 +/- 1430*

DSP-123 RERUN 10/24/06 13500 +/- 720*

DSP-124 05/26/06 10000 +/- 284 DSP-124 ORIG 10/23/06 6810 +/- 744*

DSP-124 RERUN 10/23/06 5860 +/- 673*

DSP-124 ORIG 10/23/06 6250 +/- 705*

DSP-124 RERUN 10/23/06 6670 +/- 385*

DSP-125 06/01/06 320 +/- 127 DSP-125 ORIG 10/24/06 402 +/- 116*

DSP-125 RERUN 10/24/06 257 +/- 150*

DSP-126 05/24/06 < 163 DSP-126 10/18/06 < 145

  • DSP-127 05/30/06 < 163 DSP-127 ORIG 10/23/06 217 +/- 107*

DSP-127 RERUN 10/23/06

  • 185
  • DSP-147 05/30/06 < 156 DSP-148 05/30/06 356 +/- 111 DSP-148 ORIG 10/23/06 209 +/- 101*

DSP-148 RERUN 10/23/06

  • 172
  • DSP-149 ORIG 10/23/06 640 +/- 132*

DSP-149 RERUN 10/23/06 725 +/- 147*

DSP-149R ORIG 05/31/06 668 +/- 144 DSP-149R DUP DUP 05/31/06 694 +/- 143 DSP-1 50 05/24/06

  • 161
  • INDICATED DISTILLED SAMPLE B-1

TABLE B-1.1 CONCENTRATIONS OF TRITIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE DSP-150 ORIG 10/17/06 254 +/- 108" DSP-150 RERUN 10/17/06 < 187

  • DSP-151 05/24/06 < 162 DSP-151 ORIG 10/17/06 281 +/- 119*

DSP-151 RERUN 10/17/06 < 186

  • DSP-1 52 05/23/06 < 166 DSP-152 10/19/06 < 147
  • DSP-153 05/24/06 < 158 DSP-153 10/17/06 < 145
  • DSP-154 05/25/06 < 162 DSP-154 10/20/06 < 147
  • DSP-155 05/25/06 < 167 DSP-155 ORIG 10/23/06 233 +/- 119*

DSP-155 RERUN 10/23/06 < 186

  • DSP-156 05/30/06 177 +/- 107 DSP-156 10/23/06 < 147
  • DSP-1 57 10/19/06 < 148
  • DSP-1 57 10/20/06 < . i4, DSP-1 57M 05/23/06 < 164 DSP-1 57S 05/23/06 < 163 DSP-158 10/19/06 < 149 DSP-158 10/19/06 < 142 DSP-158M 05/25/06 < 163 DSP-158S 05/25/06 < 159 DSP-159 ORIG 10/23/06 474 +/- 125" DSP-159 RERUN 10/23/06 391 +/- 127" DSP-159 10/24/06 < 146
  • DSP-159M 05/25/06 531 +/- 131 DSP-159S 05/31/06 < 170 MW-DN-1011 05/26/06 4570 +/- 208 MW-DN-1011 ORIG 10/20/06 2890 +/- 357*

MW-DN-1011 RERUN 10/20/06 2630 +/- 358*

MW-DN-1011 ORIG 10/20/06 2960 +/- 373*

MW-DN-1011 RERUN 10/20/06 2980 +/- 207*

MW-DN-101S 05/26/06 220 +/- 114 MW-DN-101S ORIG 10/17/06 265 +/- 119*

MW-DN-101S RERUN 10/17/06 < 185

  • MW-DN-1021 06/01/06 1380 +/- 195 MW-DN-1021 ORIG 10/18/06 507 +/- 130*

MW-DN-1021 RERUN 10/18/06 327 +/- 152*

MW-DN-102S 06/01/06 4250 +/- 475 MW-DN-102S ORIG 10/18/06 1300 +/- 201*

MW-DN-102S RERUN 10/18/06 1290 +/- 227*

MW-DN-1031 05/26/06 < 179 MW-DN-1031 10/18/06 < 176

  • MW-DN-103S ORIG 05/26/06 < 177 MW-DN-103S DUP DUP 05/26/06 < 183 MW-DN-103S 10/18/06 < 178
  • MW-DN-104S 05/30/06 < 173 MW-DN-104S ORIG 10/17/06 1460 +/- 226*

MW-DN-104S RERUN 10/17/06 1350 +/- 132*

  • INDICATED DISTILLED SAMPLE B-2

TABLE B-I.1 CONCENTRATIONS OF TRITIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE MW-DN-105S 06/01/06 < 178 MW-DN-106S 05/26/06 < 178 MW-DN-106S 10/20/06 < 194 MW-DN-107S 05/31/06 1040 +/- 165 MW-DN-107S ORIG 10/17/06 3190 +/- 395*

MW-DN-107S RERUN 10/17/06 3020 +/- 210*

MW-DN-1081 05/26/06 < 176 MW-DN-1081 ORIG 08/14/06 < 184

  • MW-DN-1081 DUP DUP 08/14/06 210 +/- 124" MW-DN-1081 ORIG 10/17/06 1170 +/- 194" MW-DN-1081 RERUN 10/17/06 1400 +/- 135*

MW-DN-1091 ORIG 05/31/06 3620 +/- 413 MW-DN-1091 DUP DUP 05/31/06 3750 +/- 424 MW-DN-1091 ORIG 10/19/06 2740 +/- 35O*

MW-DN-1091 RERUN 10/19/06 2830 +/- 200*

MW-DN-109S 05/31/06 251 +/- 120 MW-DN-109S 10/18/06 < 193

  • MW-DN-1101 05130/06 516 +/- 134 MW-DN-1101 ORIG 10/19/06 344 +/- 127*

MW-DN-1101 RERUN 10/19/06 571 +/- 106*

MW-DN-110S 05/30/06 < 172 MW-DN-111S 05/31/06 638 +/- 140 MW-DN-111S ORIG 10/23/06 383 +/- 134*

MW-DN-111S RERUN 10/23/06 465 +/- 105*

MW-DN-1 121 08/10/06 1520 +/- 214" MW-DN-1 121 ORIG 10/23/06 1730 +/- 250*

MW-DN-1 121 RERUN 10/23/06 1680 +/- 146*

MW-DN-1 12S 08/10/06 < 181 MW-DN-1 12S 10/17/06 < 192 MW-DN-1 131 ORIG 08/09/06 < 182 MW-DN-1131 DUP DUP 08/09/06 < 176 MW-DN-1 131 10/23/06 < 192

  • MW-DN-1 13S 08/09/06 451 +/- 136*

MW-DN-113S ORIG 10/18/06 439 +/- 138*

MW-DN-1 13S RERUN 10/18/06 492 +/- 132" MW-DN-1 141 08/14/06 4190 +/- 473*

MW-DN-1 141 ORIG 10/19/06 9610 +/- 1040*

MW-DN-1 141 RERUN 10/19/06 9530 +/- 527*

MW-DN-1 141 ORIG 10/19/06 9560 +/- 1040*

MW-DN-1 141 RERUN 10/19/06 9690 +/- 533*

MW-DN-1 14S ORIG 08/11/06 2770 +/- 336*

MW-DN-114S DUP DUP 08/11/06 2740 +/- 335*

MW-DN-1 14S ORIG 10/19/06 2790 +/- 351*

MW-DN-1 14S RERUN 10/19/06 3290 +/- 221*

MW-DN-1 151 08/11/06 < 181

  • MW-DN-1 151 10/19/06 191 +/- 121*

MW-DN-1 15S 08/14/06 < 181

  • MW-DN-115S RERUN 10/19/06 253 +/- 100*

MW-DN-1 15S RERUN 10/19/06 294 +/- 124*

MW-DN-1161 08/09/06 4150 +/- 468*

MW-DN-1 161 ORIG 10/20/06 3950 +/- 518*

  • INDICATED DISTILLED SAMPLE B-3

TABLE B-1.1 CONCENTRATIONS OF TRITIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/-2 SIGMA COLLECTION SITE DATE MW-DN-1 161 RERUN 10/20/06 4220 +/- 497*

MW-DN-116S 08/09/06 431 +/- 135*

MW-DN-1 171 08/10/06 1030 +/- 170" MW-DN-1 171 ORIG 10/23/06 494 +/- 152*

MW-DN-1 171 RERUN 10/23/06 459 +/- 136*

MW-DN-1 18S 08/10/06 1650 +/- 227*

MW-DN-1 18S ORIG 10/23/06 1280 +/- 229*

MW-DN-118S RERUN 10/23/06 1260 +/- 207*

MW-DN-1 191 08/11/06 1470 +/- 211*

MW-DN-1 191 ORIG 10/23/06 3140 +/- 418" MW-DN-1 191 RERUN 10/23/06 3720 +/- 444*

MW-DN-1 19S 08/11/06 < 183

  • MW-DN-1 19S 10/18/06 < 196
  • MW-DN-1201 08/08/06 < 180
  • MW-DN-1201 08/08/06 < 182
  • MW-DN-1201 10/20/06 < 190
  • MW-DN-120S 08/08/06 < 181
  • MW-DN-120S 10/20/06 < 196
  • MW-DN-121S 08/08/06 < 182 MW-DN-121S 10/21/06 < 160
  • MW-DN-1221 08/08/06 < 179
  • MW-DN-1221 10/19/06 < 197
  • MW-DN-122S 08/08/06 < 181
  • MW-DN-122S 10/18/06 < 196
  • MW-DN-1231 08/08/06 < 186
  • MW-DN-1231 ORIG 10/17/06 731 +/- 144*

MW-DN-1231 RERUN 10/17/06 392 +/- 121*

MW-DN-123S 08/08/06 < 183

  • MW-DN-123S 10/18/06 < 198
  • SW-1o0 05/31/06 < 170 SW-DN-101 10/16/06 < 194
  • SW-DN-102 05/31/06 < 171 SW-DN-102 10/16/06 < 197
  • SW-DN-103 05/31/06 < 171 SW-DN-103 10/16/06 < 197
  • SW-DN-1 04 06/01/06 < 168 SW-DN-104 10/16/06 < 197
  • SW-DN-105 06/01/06 < 165 SW-DN-1 05 10/16/06 < 197
  • SW-DN-106 06/01/06 < 168 SW-DN-106 10/16/06 < 186
  • SW-DN-107 06/01/06 < 170 SW-DN-107 ORIG 10/17/06 247 +/- 128*

SW-DN-1 07 RERUN 10/17/06 363 +/- 100*

  • INDICATED DISTILLED SAMPLE B-4

TABLE B-I.2 HIGHEST TO LOWEST CONCENTRATIONS OF TRITIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE U

DSP-123 RERUN 10/24/06 14900 +/- 1570*

DSP-123 ORIG 10/24/06 14000 +/- 1470*

DSP-123 ORIG 10/24/06 13600 +/- 1430*

DSP-123 RERUN 10/24/06 13500 +/- 720*

DSP-123 05/26/06 13200 +/- 319 DSP-123 05/26/06 13100 +/- 318 DSP-124 05/26/06 10000 +/- 284 DSP-107 05/23/06 9820 +/- 1030 MW-DN-1141 RERUN 10/19/06 9690 +/- 533*

MW-DN-1141 ORIG 10/19/06 9610 +/- 1040*

MW-DN-1141 ORIG 10/19/06 9560 +/- 1040*

MW-DN-1141 RERUN 10/19/06 9530 +/- 527*

DSP-124 ORIG 10/23/06 6810 +/- 744*

DSP-124 RERUN 10/23/06 6670 +/- 385*

DSP-124 ORIG 10/23/06 6250 +/- 705*

DSP-124 RERUN 10/23/06 5860 +/- 673*

DSP-107 ORIG 10/24/06 5570 +/- 613*

DSP-107 RERUN 10/24/06 5400 +/- 629*

DSP-107 RERUN 10/24/06 5350 +/- 321*

DSP-107 ORIG 10/24/06 5100 +/- 586*

MW-DN-1011 05/26/06 4570 +/- 208 MW-DN-102S 06/01/06 4250 +/- 475 MW-DN-1161 RERUN 10/20/06 4220 +/- 497*

MW-DN-1 141 08/14/06 4190 +/- 473*

MW-DN-1 161 08/09/06 4150 +/- 468*

MW-DN-1161 ORIG 10/20/06 3950 +/- 518" MW-DN-1091 DUP DUP 05/31/06 3750 +/- 424 MW-DN-1191 RERUN 10/23/06 3720 +/- 444*

MW-DN-1091 ORIG 05/31/06 3620 +/- 413 MW-DN-1 14S RERUN 10/19/06 3290 +/- 221*

MW-DN-107S ORIG 10/17/06 3190 +/- 395*

MW-DN-1191 ORIG 10/23/06 3140 +/- 418*

MW-DN-107S RERUN 10/17/06 3020 +/- 210*

MW-DN-1011 RERUN 10/20/06 2980 +/- 207*

MW-DN-1011 ORIG 10/20/06 2960 +/- 373*

MW-DN-1011 ORIG 10/20/06 2890 +/- 357*

MW-DN-1091 RERUN 10/19/06 2830 +/- 200*

MW-DN-1 14S ORIG 10/19/06 2790 +/- 351*

MW-DN-114S ORIG 08/11/06 2770 +/- 336*

MW-DN-1091 ORIG 10/19/06 2740 +/- 350*

MW-DN-114S DUP DUP 08/11/06 2740 +/- 335*

MW-DN-1011 RERUN 10/20/06 2630 +/- 358*

DSP-122 ORIG 10/24/06 2480 +/- 300*

DSP-122 RERUN 10/24/06 2400 +/- 335*

DSP-106 05/23/06 2370 +/- 289 DSP-106 ORIG 10/20/06 2210 +/- 276*

DSP-108 ORIG 10/24/06 2190 +/- 271*

DSP-108 05/24/06 1930 +/- 244 DSP-106 RERUN 10/20/06 1910 +/- 285*

DSP-108 RERUN 10/24/06 1780 +/- 271*

MW-DN-1121 ORIG 10/23/06 1730 +/- 250*

  • INDICATED DISTILLED SAMPLE B-5

TABLE B-I.2 HIGHEST TO LOWEST CONCENTRATIONS OF TRITIUM IN GROUNDWATER SAMPLES COLLECTED INTHE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/-2 SIGMA COLLECTION SITE DATE MW-DN-1121 RERUN 10/23/06 1680 +/- 146*

MW-DN-1 18S 08/10/06 1650 +/- 227*

MW-DN-1121 08/10/06 1520 +/- 214*

MW-DN-1191 08/11/06 1470 +/- 211" MW-DN-104S ORIG 10/17/06 1460 +/- 226*

DSP-122 05/25/06 1440 +/- 139 MW-DN-1081 RERUN 10/17/06 1400 +/- 135*

MW-DN-1021 06/01/06 1380 +/- 195 MW-DN-104S RERUN 10/17/06 1350 +/- 132*

MW-DN-102S ORIG 10/18/06 1300 +/- 201*

MW-DN-102S RERUN 10/18/06 1290 +/- 227*

MW-DN-118S ORIG 10/23/06 1280 +/- 229*

MW-DN-118S RERUN 10/23/06 1260 +/- 207*

MW-DN-1081 ORIG 10/17/06 1170 +/- 194*

MW-DN-107S 05/31/06 1040 +/- 165 MW-DN-1171 08/10/06 1030 +/- 170*

MW-DN-1231 ORIG 10/17/06 731 +/- 144*

DSP-149 RERUN 10/23/06 725 +/- 147*

DSP-149R DUP DUP 05/31/06 694 +/- 143 DSP-149R ORIG 05/31/06 668 +/- 144 DSP-149 ORIG 10/23/06 640 +/- 132*

MW-DN-111S 05/31/06 638 +/- 140 MW-DN-1101 RERUN 10/19/06 571 +/- 106*

DSP-159M 05/25/06 531 +/- 131 MW-DN-1101 05/30/06 516 +/- 134 MW-DN-1021 ORIG 10/18/06 507 +/- 130*

MW-DN-1171 ORIG 10/23/06 494 +/- 152*

MW-DN-113S RERUN 10/18/06 492 +/- 132*

DSP-159 ORIG 10/23/06 474 +/- 125*

MW-DN-111S RERUN 10/23/06 465 +/- 105*

MW-DN-1171 RERUN 10/23/06 459 +/- 136*

MW-DN-113S 08/09/06 451 +/- 136*

MW-DN-113S ORIG 10/18/06 439 +/- 138*

MW-DN-116S 08/09/06 431 +/- 135*

DSP-105 ORIG 10/20/06 428 +/- 121*

DSP-125 ORIG 10/24/06 402 +/- 116*

MW-DN-1231 RERUN 10/17/06 392 +/- 121*

DSP-159 RERUN 10/23/06 391 +/- 127*

MW-DN-111S ORIG 10/23/06 383 +/- 134*

SW-DN-107 RERUN 10/17/06 363 +/- 99.9*

DSP-148 05/30/06 356 +/- 111 MW-DN-1101 ORIG 10/19/06 344 +/- 127*

MW-DN-1021 RERUN 10/18/06 327 +/- 152*

DSP-125 06/01/06 320 +/- 127 DSP-105 05/23/06 319 +/- 117 DSP-105 RERUN 10/20/06 302 +/- 123*

MW-DN-115S RERUN 10/19/06 294 +/- 124*

DSP-151 ORIG 10/17/06 281 +/- 119*

MW-DN-101S ORIG 10/17/06 265 +/- 119*

DSP-125 RERUN 10/24/06 257 +/- 150*

DSP-150 ORIG 10117106 254 +/- 108*

  • INDICATED DISTILLED SAMPLE B-6

TABLE B-I.2 HIGHEST TO LOWEST CONCENTRATIONS OF TRITIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/-2 SIGMA COLLECTION SITE DATE MW-DN-115S RERUN 10/19/06 253 +/- 100*

MW-DN-109S 05/31/06 251 +/- 120 SW-DN-107 ORIG 10/17/06 247 t 128*

DSP-155 ORIG 10/23/06 233 +/- 119" MW-DN-101S 05/26/06 220 +/- 114 DSP-127 ORIG 10/23/06 217 +/- 107*

MW-DN-1081 DUP DUP 08/14/06 210 +/- 124*

DSP-148 ORIG 10/23/06 209 +/- 101" MW-DN-123S 10/18/06 < 198

  • MW-DN-1221 10/19/06 < 197
  • SW-DN-102 10/16/06 < 197
  • SW-DN-103 10/16/06 < 197
  • SW-DN-104 10/16/06 < 197
  • SW-DN-105 10/16/06 < 197
  • MW-DN-119S 10/18/06 < 196
  • MW-DN-120S 10/20/06 < 196
  • MW-DN-122S 10/18/06 < 196
  • MW-DN-106S 10/20/06 < 194
  • SW-DN-101 10/16/06 < 194
  • MW-DN-109S 10/18/06 < 193
  • MW-DN-112S 10/17/06 < 192
  • MW-DN-1 131 10/23/06 < 192
  • DSP-118 10/20/06 191 +/- 108*

MW-DN-1151 10/19/06 191 +/- 121" MW-DN-1201 10/20/06 < 190

  • DSP-150 RERUN 10/17/06 < 187
  • DSP-151 RERUN 10/17/06 < 186
  • DSP-155 RERUN 10/23/06 < 186
  • MW-DN-1231 08/08/06 < 186
  • SW-DN-106 10/16/06 < 186
  • DSP-127 RERUN 10/23/06 < 185
  • MW-DN-101S RERUN 10/17/06 < 185
  • MW-DN-1081 ORIG 08/14/06 < 184
  • MW-DN-103S DUP DUP 05/26/06 < 183 MW-DN-119S 08/11/06 < 183
  • MW-DN-123S 08/08/06 < 183
  • MW-DN-1131 ORIG 08/09/06 < 182
  • MW-DN-1201 08/08/06 < 182
  • MW-DN-121S 08/08/06 < 182
  • MW-DN-112S 08/10/06 < 181
  • MW-DN-1151 08/11/06 < 181
  • MW-DN-115S 08/14/06 < 181
  • MW-DN-120S 08/08/06 < 181
  • MW-DN-122S 08/08/06 < 181
  • MW-DN-1201 08/08/06 < 180
  • MW-DN-1031 05/26/06 < 179 MW-DN-1221 08/08/06 < 179
  • MW-DN-103S 10/18/06 < 178
  • MW-DN-105S 06/01/06 < 178 MW-DN-106S 05/26/06 < 178 DSP-156 05/30/06 177 +/- 107
  • INDICATED DISTILLED SAMPLE B-7

TABLE B-1.2 HIGHEST TO LOWEST CONCENTRATIONS OF TRITIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE MW-DN-103S ORIG 05/26/06

  • 177 MW-DN-1031 10/18/06
  • 176 MW-DN-1081 05/26/06
  • 176 MW-DN-1131 DUP DUP 08/09/06
  • 176 MW-DN-104S 05/30/06
  • 173 DSP-148 RERUN 10/23/06
  • 172 MW-DN-110S 05/30/06
  • 172 SW-DN-102 05/31/06 < 171 SW-DN-103 05/31/06
  • 171 DSP-159S 05/31/06
  • 170 SW-101 05/31/06
  • 170 SW-DN-107 06/01/06
  • 170 SW-DN-104 06/01/06
  • 168 SW-DN-106 06/01/06
  • 168 DSP-155 05/25/06
  • 167 DSP-118 05/25/06
  • 166 DSP-152 05/23/06
  • 166 DSP-117 05/26/06
  • 165 DSP-121 05/26/06
  • 165 SW-DN-105 06/01/06
  • 165 DSP-157M 05/23/06
  • 164 DSP-126 05/24/06
  • 163 DSP-127 05/30/06
  • 163 DSP-157S 05/23/06
  • 163 DSP-158M 05/25/06
  • 163 DSP-151 05/24/06
  • 162 DSP-154 05/25/06
  • 162 DSP-150 05/24/06
  • 161 MW-DN-121S 10/21/06
  • 160 DSP-1 58S 05/25/06
  • 159 DSP-153 05/24/06
  • 158 DSP-147 05/30/06
  • 156 DSP-158 10/19/06
  • 149 DSP-157 10/19/06
  • 148 DSP-117 10/23/06
  • 147 DSP-152 10/19/06
  • 147 DSP-154 10/20/06
  • 147 DSP-1 56 10/23/06
  • 147 DSP-157 10/20/06
  • 146 DSP-159 10124/06
  • 146 DSP-121 10/20/06
  • 145 DSP-126 10/18/06
  • 145 DSP-153 10/17/06
  • 145 DSP-1 58 10/19/06
  • 142
  • INDICATED DISTILLED SAMPLE B-8

TABLE B-I.3 CONCENTRATIONS OF TRITIUM IN SENTINEL WELL AND SEWER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION COLLECTION COLLECTION COLLECTION SITE DATE H-3 SITE DATE H-3 SITE DATE H-3 SITE DATE H-3 E-7 04/10/06 1,800 R-1 07/14/06 9,300 T-6 01/03/06 17,000 W-3 01/03/06 7,000 E-7 04/14/06 300 R-1 07/17/06 12,000 T-6 01/31/06 86,000 W-3 01/31/06 21,000 E-7 04/24/06 400 R-1 07/25/06 19,000 T-6 02/12/06 124,000 W-3 03/08/06 66,800 E-7 05/04/06 1,100 R-1 07/31/06 2,650 T-6 02/13/06 131,800 W-3 04/03/06 120,600 E-7 05/08/06 900 R-1 08/07/06 1,700 T-6 02/14/06 134,300 W-3 04/04/06 159,200 E-7 05/11/06 700 R-1 08/15/06 6,500 T-6 02/15/06 128,300 W-3 04/07/06 224,200 E-7 05/15/06 500 R-1 08/23/06 3,000 T-6 02/16/06 102,300 W-3 04/20/06 224,500 E-7 05/18/06 900 R-1 09/12/06 6,100 T-6 02/17/06 11,200 W-3 04/21/06 228,700 E-7 05/25/06 700 R-1 09/22/06 1,500 T-6 02/18/06 24,800 W-3 04/24/06 110,000 E-7 06/02/06 300 R-1 09/29/06 60,000 T-6 02/19/06 48,300 W-3 04/27/06 265,000 E-7 06/05/06 300 R-1 11/03/06 31,000 T-6 02/20/06 56,000 W-3 05/08/06 220,000 E-7 06/08/06 1,200 R-1 11/09/06 19,000 T-6 02/23/06 35,000 W-3 05/11/06 280,000 E-7 06/15/06 300 R-1 12/03/06 600 T-6 04/13/06 220,000 W-3 05/15/06 98,000 E-7 06/19/06 400 R-1 12/13/06 21,000 T-6 04/14/06 220,000 W-3 05/18/06 52,000 E-7 07/06/06 500 R-1 12/15/06 25,000 T-6 04/17/06 110,000 W-3 05/25/06 180,000 E-7 07/11/06 800 R-1 12/27/06 21,200 T-6 04/19/06 190,000 W-3 06/01/06 70,000 E-7 07/25/06 1,100 T-6 04/21/06 9,800 W-3 06/05/06 65,000 E-7 07/31/06 1,950 T-6 04/21/06 5,800 W-3 06/08/06 250,000 E-7 08/07/06 1,000 T-6 04/24/06 170,000 W-3 06/15/06 13,000 E-7 08/23/06 200 T-6 04/27/06 1 30,000 W-3 06/19/06 180,000 E-7 08/31/06 200 T-6 05/04/06 39,000 W-3 07/06/06 140,000 E-7 09/07/06 200 T-6 05/08/06 64,000 W-3 07/11/06 80,000 E-7 09/12/06 200 T-6 05/15/06 9,100 W-3 07/17/06 66,000 E-7 09/22/06 500 T-6 05/18/06 5,100 W-3 07/31/06 18,000 E-7 09/29/06 0 T-6 05/25/06 160,000 W-3 08/02/06 19,000 E-7 10/03/06 1,100 T-6 06/02/06 22,000 W-3 08/03/06 31,000 E-7 10/16/06 300 T-6 06/05/06 140,000 W-3 08/07/06 41,000 E-7 10/26/06 1,600 T-6 06/08/06 160,000 W-3 08/23/06 29,000 E-7 11/03/06 500 T-6 06/15/06 120,000 W-3 09/18/06 6,300 E-7 11/09/06 1,100 T-6 06/19/06 86,000 W-3 09/29/06 26,000 E-7 12/03/06 200 T-6 07/06/06 3,900 W-3 10/04/06 38,000 E-7 12/15/06 300 T-6 07/14/06 13,000 W-3 10/10/06 49,000 E-7 12/27/06 1,000 T-6 07/17/06 7,300 W-3 10/16/06 54,000 T-6 07/25/06 7,000 W-3 10/27/06 36,000 T-6 07/31/06 5,150 W-3 11/02/06 39,000 T-6 08/03/06 5,800 W-3 11/10/06 34,000 T-6 08/07/06 4,700 W-3 12/03/06 27,000 T-6 08/15/06 5,000 W-3 12/15/06 21,000 T-6 08/23/06 3,800 W-3 12/27/06 27,000 T-6 09/12/06 81,000 W-3 T-6 09/18/06 11,000 W-3 T-6 10/06/06 52,000 W-3 T-6 10/16/06 36,000 W-3 T-6 11/03/06 1,700 W-3 T-6 11/09/06 2,800 W-3 T-6 12/27/06 1,700 W-3 B-9

TABLE B-I.3 CONCENTRATIONS OF TRITIUM IN SENTINEL WELL SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION COLLECTION COLLECTION COLLECTION SITE DATE H-3 SITE DATE H-3 SITE DATE H-3 SITE DATE H-3 W-2R U1/U3/0U 93,UUU DSP-124 02/17/06 9,3UU UDP-131 U4/13/0U ,000 DSP-132 03/103/06 710 W-2R 01/31/06 60,000 DSP-124 02/17/06 12,000 DSP-131 04/17/06 1,000 DSP-132 04/13/06 700 W-2R 02/13/06 63,800 DSP-124 02/18/06 12,200 DSP-131 04/24/06 800 DSP-132 04/17/06 1,000 W-2R 03/30/06 99,400 DSP-124 02/19/06 10,300 DSP-131 04/27/06 800 DSP-132 04/24/06 600 W-2R 03/31/06 97,100 9,800 DSP-131 05/04/06 1,100 DSP-132 04/27/06 1,100 DSP-124 02/201/06 W-2R 04/01/06 123,400 DSP-124 02/21/06 9,500 DSP-131 05/08/06 500 DSP-132 05/04/06 1,100 W-2R 04/02/06 121,200 DSP-124 02/22/06 11,100 DSP-131 05/11/06 1,200 DSP-132 05/08/06 600 W-2R 04/03/06 121,400 DSP-124 02123/06 9,700 DSP-131 05/15/06 460 DSP-132 05/11/06 300 W-2R 04/04/06 104,300 DSP-124 04/13/06 8,000 DSP-131 05/18/06 500 DSP-132 05/15/06 460 W-2R 04/05/06 105,800 DSP-124 04/14/06 8,200 DSP-131 05/25/06 1,100 DSP-132 05/18/06 300 W-2R 04/06/06 88,200 DSP-124 04/24/06 3,700 DSP-131 06/01/06 900 DSP-132 05/25/06 500 W-2R 04/07/06 120,600 DSP-124 04/27/06 3,500 DSP-131 06/05/06 700 DSP-132 06/01/06 600 W-2R 04/08/06 141,100 DSP-124 05/04/06 3,000 DSP-131 06/08/06 900 DSP-132 06/05/06 500 W-2R 04/09/06 155,600 DSP-124 05/1081/06 2,400 DSP-131 06/15/06 700 DSP-132 06/08/06 700 W-2R 04/10/06 103,500 DSP-124 05/11/06 3,500 DSP-131 06/19/06 700 DSP-132 06/15/06 700 W-2R 04/14/06 91,000 DSP-124 05/15/06 3,700 DSP-131 07/06/06 500 DSP-132 06/19/06 600 W-2R 04/17/06 88,000 DSP-124 05/18/06 3,300 DSP-131 07/11/06 700 DSP-132 07/06/06 1,700 W-2R 04/19/06 93,000 DSP-124 05/125/06 5,800 DSP-131 07/17/06 700 DSP-132 07/11/06 700 W-2R 04/24/06 61,000 DSP-124 06/01/06 12,000 DSP-131 07/25/06 1,100 DSP-132 07/17/06 1,100 W-2R 04/27/06 84,000 DSP-124 06/105/06 14,000 DSP-131 07/31/06 900 DSP-132 07/25/06 1,100 W-2R 05/04/06 53,000 DSP-124 06/15/06 15,000 DSP-131 07/31/06 800 DSP-132 07/31/06 750 W-2R 05/08/06 67,000 DSP-124 06/19/06 15,000 DSP-131 08/07/06 1,000 DSP-132 08/03/06 500 W-2R 05/11/06 87,000 DSP-124 07/1061/06 14,000 DSP-131 08/15/06 700 DSP-132 08/07106 1,000 W-2R 05/15/06 47,000 DSP-124 07/11/06 12,000 DSP-131 08/23/06 600 DSP-132 08/15/06 900 W-2R 05/18/06 28,000 DSP-124 07/17/06 11,000 DSP-131 08/31/06 600 DSP-132 08/23/06 600 W-2R 05/25/06 49,000 DSP-124 07/25/06 11,000 DSP-131 09/07/06 900 DSP-132 08/31/06 800 W-2R 06/01/06 20,000 DSP-124 07/31/06 10,000 DSP-131 09/12/06 500 DSP-132 09/07/06 700 W-2R 06/05/06 27,000 DSP-124 08071/06 11,000 DSP-131 09/22/06 300 DSP-132 09/12/06 600 W-2R 06/08/06 39,000 DSP-124 09/18/06 11,000 DSP-131 09/29/06 200 DSP-132 09/22/06 700 W-2R 06/15/06 290,000 DSP-124 09/29/06 9,400 DSP-131 10/03/06 1,100 DSP-132 09/29/06 400 W-2R 06/19/06 46,000 DSP-124 10/104/06 8,000 DSP-131 10/10/06 500 DSP-132 10/03/06 1,100 W-2R 07/06/06 17,000 DSP-124 10/10/06 6,900 DSP-131 10/16/06 400 DSP-132 10/10/06 500 W-2R 07/11/06 19,000 DSP-124 10/16/06 9,300 DSP-131 10/26/06 300 DSP-132 10/16/06 600 W-2R 07/17/06 14,000 DSP-124 10/23/06 5,600 DSP-131 10/31/06 400 DSP-132 10/23/06 400 W-2R 07/25/06 8,300 DSP-124 10/27/06 6,100 DSP-131 11/09/06 300 DSP-132 10/31/06 900 W-2R 07/31/06 16,000 DSP-124 11/02/06 6,300 DSP-131 12/15/06 700 DSP-132 11/09/06 900 W-2R 08/02/06 16,000 DSP-124 11/09/06 8,867 DSP-131 12/27/06 100 DSP-132 12/02/06 400 W-2R 08/03/06 15,000 DSP-124 12/03/06 10,000 DSP-132 12/27/06 200 W-2R 08/07/06 11,000 DSP-124 12/13/06 13,000 W-2R 08/23/06 9,800 DSP-124 12/27/06 16,000 W-2R 09/18/06 9,000 W-2R 09/29/06 20,000 W-2R 10/04/06 33,000 W-2R 10/10/06 36,000 W-2R 10/16/06 35,000 W-2R 10/27/06 19,000 W-2R 11/02/06 17,000 W-2R 11/10/06 8,800 W-2R 12/03/06 3,600 W-2R 12/27/06 3,900 B-10

TABLE B-I.4 CONCENTRATIONS OF STRONTIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE DSP-151 10/17/06 2.6 +/- 0.7 DSP-155 05/25/06 0.7 +/- 0.4 MW-DN-1081 05/26/06 4.4 +/- 1.2 MW-DN-1081 05/26/06 3.4 +/- 0.8 MW-DN-1081 ORIG 08/14/06 3.2 +/- 1.0 MW-DN-1 081 ORIG RERUN 08/14/06 3.5 +/- 0.6 MW-DN-1081 DUP DUP 08/14/06 2.7 +/- 1.0 MW-DN-1081 DUP DUP RERUN 08/14/06 4.2 +/- 0.9 MW-DN-1081 10/17/06 2.7 +/- 1.2 B-11

TABLE B-I.5 HIGHEST TO LOWEST CONCENTRATIONS OF STRONTIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE MW-DN-1081 05/26/06 4.4 +/- 1.2 MW-DN-1081 DUP DUP RERUN 08/14/06 4.2 +/- 0.9 MW-DN-1081 ORIG RERUN 08/14/06 3.5 +/- 0.6 MW-DN-1081 05/26/06 3.4 +/- 0.8 MW-DN-1081 ORIG 08/14/06 3.2 +/- 1.0 MW-DN-1081 DUP DUP 08/14/06 2.7 + 1.0 MW-DN-1081 10/17/06 2.7 +/- 1.2 DSP-151 10/17/06 2.6 +/- 0.7 DSP-155 05/25/06 0.7 +/- 0.4 B - 12

TABLE B-1.6 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER 12 SIGMA COLLECTION SITE DATE BE-7 K-40 CO-60 DSP-118 10/20/06 57 +/- 38 DSP-121 05/26/06 64 +/- 46 DSP-122 05/25/06 - 59 +/- 53 DSP-123 05/26/06 - 75 +/- 49 DSP-126 05/24/06 - 64 +/- 42 DSP-127 05/30/06 - 38 +/- 35 DSP-149 10/23/06 - 50 +/- 43 DSP-154 05/25/06 - 68 +/- 51 DSP-156 05/30/06 - 68 +/- 46 DSP-158M 05/25/06 - 165 +/- 26 DSP-159 10/23/06 - 82 +/- 51 MW-DN-1011 05/26/06 - 45 +/- 38 MW-DN-1 02S 06/01/06 - 44 +/- 36 MW-DN-102S 10/18/06 - 89 +/- 56 MW-DN-103S 101/8/06 - 110 +/- 48 MW-DN-106S 10/20/06 - 69 +/- 52 MW-DN-107S 05/31/06 - 43 +/- 34 MW-DN-107S 10/17/06 4+/-3 MW-DN-1081 05126/06 - 44 +/- 35 MW-DN-1091 10/19/06 - 78 +/- 68 MW-DN-111S 10/23/06 - 62 +/- 51 MW-DN-1 131 08/09/06 - 60 +/- 36 MW-DN-113S 10/18/06 - 54 +/- 36 MW-DN-1151 10/19/06 - 76 +/- 28 MW-DN-115S 10/19/06 - 53 +/- 52 MW-DN-1 171 10/23/06 - 90 +/- 53 MW-DN-1201 08/08/06 - 103 +/- 50 MW-DN-120S 08/08/06 - 55 +/- 44 MW-DN-121S 10/21/06 - 36 +/- 25 MW-DN-1221 08/08/06 - 104 +/- 48 MW-DN-1221 10/19/06 - 118 +/- 70 SW-DN-103 10/16/06 - 119 +/- 77 SW-DN-105 06/01/06 - 84 +/- 43 SW-DN-105 10/16/06 - 332 +/- 55 B - 13

TABLE B-I.7 HIGHEST TO LOWEST CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF DRESDEN NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE K-40 CO-60 SW-DN-105 10/16/06 332 +/- 55 DSP-1 58M 05/25/06 165 +/- 26 SW-DN-103 10/16/06 119 +/- 77 MW-DN-1221 10/19/06 118 +/- 70 MW-DN-103S 10/18/06 110 +/- 48 MW-DN-1221 08/08/06 104 +/- 48 MW-DN-1201 08108/06 103 +/- 50 MW-DN-1 171 10/23/06 90 +/- 53 MW-DN-102S 10/18/06 89 +/- 56 SW-DN-105 06/01/06 84 +/- 43 DSP-159 10/23/06 82 +/- 51 MW-DN-1091 10/19/06 78 +/- 68 MW-DN-1151 10/19/06 76 +/- 28 DSP-123 05/26/06 75 +/- 49 MW-DN-106S 10/20/06 69 +/- 52 DSP-156 05/30/06 68 +/- 46 DSP-154 05/25/06 68 +/- 51 DSP-126 05/24/06 64 +/- 42 DSP-121 05/26/06 64 +/- 46 MW-DN-111S 10/23/06 62 +/- 51 MW-DN-1 131 08/09/06 60 +/- 36 DSP-122 05/25/06 59 +/- 53 DSP-118 10/20/06 57 +/- 38 MW-DN-120S 08/08/06 55 +/- 44 MW-DN-113S 10/18/06 54 +/- 36 MW-DN-115S 10/19/06 53 +/- 52 DSP-149 10/23/06 50 +/- 43 MW-DN-1011 05/26/06 45 +/- 38 MW-DN-102S 06/01/06 44 +/- 36 MW-DN-1081 05/26/06 44 +/- 35 MW-DN-107S 05/31/06 43 +/- 34 DSP-127 05/30/06 38 +/- 35 MW-DN-121S 10/21/06 36 +/- 25 MW-DN-107S 10/17/06 4+/- 3 B - 14

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  • MONITORING WELL figure 2 S -SHALLOW PROTECTED AREA I - INTERMEDIATE PARTIAL SITE PLAN ELECTRICAL TOWER SECURITY-RELATED INFORMATION WITHHOLD FROM PUBLIC DISCLOSURE DRESDEN GENERATING STATION UNDER 10 CFR 2.390 AND Momls, Illinois 5 ILCS 140/7(l)(a) & (mm)
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