ML071550155

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Annual Radiological Groundwater Protection Program Report, January 1, 2006 Through December 31, 2006
ML071550155
Person / Time
Site: Peach Bottom  Constellation icon.png
Issue date: 05/31/2007
From:
Exelon Nuclear, Teledyne Brown Engineering Environmental Services
To:
Office of Nuclear Reactor Regulation
References
Download: ML071550155 (34)
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Docket No: 50-277 50-278 PEACH BOTTOM ATOMIC POWER STATION UNITS 2 and 3 Annual Radiological Groundwater Protection Program Report 1 January Through 31 December 2006 Prepared By Teledyne Brown Engineering Environmental Services Nuclear Peach Bottom Atomic Power Station Delta, PA 17314 May 2007

Table Of Contents I. Sum m ary and Conclusions ........................................................................................... 1 I1. Introduction ........................................................................................................................ 4 A. O bjectives of the RG PP .................................................................................... 4 B. Im plem entation of the O bjectives .................................................................... 5 C . Program Description ......................................................................................... 5 D. Characteristics of Tritium (H-3) ......................................................................... 6 Ill. Program Description .................................................................................................... 7 A . Sam ple Analysis ................................................................................................ 7 B. Data Interpretation ............................................................................................. 7 C . Background Analysis ......................................................................................... 8

1. Background Concentrations of Tritium .................................................. 9 IV. Results and Discussion ............................................................................................. 11 A. G roundwater Results ....................................................................................... 11 B. Drinking W ater W ell Survey ........................................................................... 11 C. Summary of Results - Inter-laboratory Comparison Program ....................... 11 D. Leaks, Spills, and Releases ........................................................................... 12 E. Trends .................................................................................................................. 12 F. Investigations .................................................................................................. 12 G . Actions Taken ................................................................................................... 12 V. References ...................................................................................................................... 12

Appendices Appendix A Sampling Locations, Distance and Direction Tables Table A-1: Radiological Groundwater Protection Program - Sampling Locations, Distance and Direction, Peach Bottom Atomic Power Station, 2006 Figure A-1: Well Water Locations, Peach Bottom Atomic Power Station, 2006 Figure A-2: RGPP Monitoring Locations, Peach Bottom Atomic Power Station, 2006

-F-Appendix B.-,

Tables Table B-1.1 Concentrations of Tritium in Groundwater, Seep and Surface Water Samples Collected in the Vicinity of Peach Bottom Atomic Power Station, 2006.

Table B-1.2 Highest to Lowest Concentrations of Tritium in Groundwater, Seep and Surface Water Samples Collected in the Vicinity of Peach Bottom Atomic Power Station, 2006.

Table B-1.3 Concentrations of Strontium in Groundwater, Seep and Surface Water Samples Collected in the Vicinity of Peach Bottom Atomic Power Station, 2006.

Table B-1.4 Highest to Lowest Concentrations of Strontium in Groundwater, Seep and Surface Water Samples Collected in the Vicinity of Peach Bottom Atomic Power Station, 2006.

Table B-1.5 Concentrations of Gamma Emitters in Groundwater and Seep Samples Collected in the Vicinity of Peach Bottom Atomic Power Station, 2006.

Table B-1.6 Highest to Lowest Concentrations of Surface Water Samples Collected in the Vicinity of Peach Bottom Atomic Power Station, 2006.

ii

Summary and Conclusions This report on the Radiological Groundwater Protection Program (RGPP) conducted for the Peach Bottom Atomic Power Station (PBAPS) by Exelon Nuclear covers the period 01 January 2006 through 31 December 2006. This evaluation involved numerous station personnel and contractor support personnel. At Peach Bottom Atomic Power Station, 14 permanent groundwater monitoring wells were installed in 2006. Of these new monitoring locations, none were assigned to the station's Radiological Environmental Monitoring Program (REMP). The results are included in this report. This is the first in a series of annual reports on the status of the Radiological Groundwater Protection Program (RGPP) conducted at Peach Bottom Atomic Power Station. This report covers groundwater and surface water samples, collected from the environment, both on and off station property in 2006. During that time period, 195 analyses were performed on 69 samples from 29 locations. The monitoring was conducted in two phases. Phase 1 of the monitoring was part of a comprehensive study initiated-by Exelon to determine whether groundwateror surface water at and in

.. theviitftyPeofeach ýBotAtomcPower-iStatin,haad'been adversely~mrpacted by any releases of radionuclides. Phase 1 was conducted by Conestoga Rovers and Associates (CRA) and the conclusions were made available to state and federal regulators as well as the public on an Exelon web site http://www exeloncorp.com/ourcompanies/powergen/nuclear/Tritium.htm].

Phase 2 of the RGPP was conducted by Exelon corporate and station personnel to initiate follow up of Phase 1 and begin long-term monitoring at groundwater and surface water locations selected during Phase 1. All analytical results from both the Phase 1 and Phase 2 monitoring are reported herein.

In assessing all the data gathered for this report, it was concluded that the operation of Peach Bottom Atomic Power Station had no adverse radiological impact on the environment, and there are no known active releases into the groundwater at Peach Bottom Atomic Power Station.

Gamma-emitting radionuclides associated with licensed plant operations were not detected at concentrations greater than their respective Lower Limits of Detection (LLDs) as specified in the Offsite Dose Calculation Manual (ODCM) in any of the groundwater or surface water samples. In the case of tritium, Exelon specified that it's laboratories achieve a lower limit of detection 10 times lower than that required by federal regulation.

Strontium-89/90 was not detected at a concentration greater than the LLD of 2.0 picoCuries per liter (pCi/L) in any of the groundwater or surface water samples tested.

Tritium wasnot detected in any of the groundwater or surface water samples at concentrations greater than the United States Environmental Protection Agency (USEPA) drinking water standard (and the Nuclear Regulatory Commission Reporting Limit) of 20,000 pCi/L. Low levels of tritium were detected at concentrations greater than the LLD of 200 pCi/L in 8 of 29 groundwater and surface water monitoring locations. The tritium concentrations ranged from 200 +

121 pCi/L to 1,260 +/- 208 pCi/L. Tritium was detected in some samples collected from bedrock wells, bedrock seeps and overburden wells. Based on the sample data, tritium is not migrating off the station property at detectable concentrations and there are no active releases into the groundwater at the station.

Intentionally left blank II. Introduction Peach Bottom Atomic Power Station (PBAPS) is located along the Susquehanna River between Holtwood and Conowingo Dams in Peach Bottom Township, York County, Pennsylvania. The initial loading of fuel into Unit 1, a 40 MWe (net) high temperature, gas-cooled reactor, began on 5 February 1966, and initial criticality was achieved on 3 March 1966. Shutdown of Peach Bottom Unit 1 for decommissioning was on 31 October 1974. For the purposes of the monitoring program, the beginning of the operational period for Unit 1 was considered to be 5 February 1966. A summary of the Unit 1 preoperational monitoring program was presented in a previous report (1). PBAPS Units 2 and 3 are boiling water reactors, each with a power output of approximately 1170 MWe. The first fuel was loaded into Peach Bottom Unit 2 on 9 August 1973. Criticality was achieved on 16 September 1973, and full power was reached on 16 June 1974. The first fuel was loaded into Peach Bottom Unit 3 on 5 July 1974. Criticality was achieved on 7 August 1974, and full power was first reached on 21 December 1974.

~Pr,~aioa Uh-its~27and3-hi~hvp~eýoe-n-previously~.issued-and summarize the results of all analyses performed on samples collected from 5 February 1966 through 8 August 1973.

This report covers those analyses performed by Teledyne Brown Engineering (TBE) and Environmental Inc. (Midwest Labs) on samples collected in 2006.

A. Objective of the RGPP The long-term objectives of the RGPP are as follows:

1. Identify suitable locations to monitor and evaluate potential impacts from station operations before significant radiological impact to the environment and potential drinking water sources.
2. Understand the local hydrogeologic regime in the vicinity of the station and maintain up-to-date knowledge of flow patterns on the surface and shallow subsurface.
3. Perform routine water sampling and radiological analysis of water from selected locations.
4. Report new leaks, spills, or other detections with potential radiological significance to stakeholders in a timely manner.
5. Regularly assess analytical results to identify adverse trends.
6. Take necessary corrective actions to protect groundwater resources.

B. Implementation of the Objectives The objectives identified have been implemented at Peach Bottom Atomic Power Station as discussed below:

1. Exelon and its consultant identified locations as described in the Phase 1 study. Phase 1 studies were conducted by Conestoga Rovers and Associates (CRA) and the results and conclusions were made available to state and federal regulators as well as the public on an Exelon web site in station specific reports. Samples for Phase 2 were collected by Normandeau associates.

http://www.exeloncorp.com/ourcom panies/powergen/nuclear/Tritiu m.htm

~ he.ec-otowtmcPowar §Staion- reppy-ts ýdescribe thel,,ocal,ý-

hydrogeologic regime. Periodically, the flow patterns ori th&e-surface and shallow subsurface are updated based on ongoing measurements.

3. Peach Bottom Atomic Power Station will continue to perform routine sampling and radiological analysis of water from selected locations.
4. Peach Bottom Atomic Power Station has implemented new procedures to identify and report new leaks, spills, or other detections with potential radiological significance in a timely manner.
5. Peach Bottom Atomic Power Station staff and consulting hydrogeologist assess analytical results on an ongoing basis to identify adverse trends.

C. Program Description

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

Groundwater and Surface Water Samples of water are collected, managed, transported and analyzed in accordance with approved procedures following EPA I

methods. Both groundwater and surface water are collected.

Sample locations, sample collection frequencies and analytical frequencies are controlled in accordance with approved station procedures. Contractor and/or station personnel are trained in the collection, preservation management, and shipment of samples, as well as in documentation of sampling events. Analytical laboratories are subject to internal quality assurance programs, industry cross-check programs, as well as nuclear industry audits.

Station personnel review and evaluate all analytical data deliverables as data are received.

Analytical data results are reviewed by both station personnel and an independent hydrogeologist for adverse trends or changes to hydrogeologic conditions.

D. Characteristics of Tritium (H-3)

Tritium (chemical symbol H-3) is a radioactive isotope of y*yrogen 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.

Ill. Program Description A. Sample Analysis This section describes the general analytical methodologies used by TBE and EIML to analyze the environmental samples for radioactivity for the Peach Bottom Atomic Power Station RGPP in 2006.

In order to achieve the stated objectives, the current program includes the

-- -fllowingaina'Iyses:-----------

f --

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 Peach Bottom Atomic Power Station becoming operational were used as a baseline with which these operational data were compared. For the purpose of this report, Peach Bottom Atomic Power Station was considered operational at initial criticality. Several factors were important in the interpretation of the data:

1. Lower Limit of Detection The lower limit of detection (LLD) is 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

-groupe.d .as-follow's:

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, Peach Bottom Atomic Power Station, Environs Radiation Monitoring Program, Preoperational Summary Report units 2 and 3, September 1970- August 1973, January 1974 and Peach Bottom Atomic Power Station, Environs Radiation Monitoring Program, Preoperational Summary Report units 2 and 3, June 1977.

The pre-operational REMP contained analytical results from samples collected from the surface water, discharge, well and rain water.

The pre-operational REMP (Units 2 and 3) analytical results from samples collected from surface water and drinking water wells indicate that tritium was detected in both surface water and drinking water samples. Tritium concentrations in surface water ranged from non-detect at the lower limit of detection (LLD) of 80 picoCuries per liter (pCi/L) to 1,300 pCi/L over the 3-year monitoring period (1970-1973). Tritium concentrations in drinking water ranged from non-detect at the LLD of 80 pCi/L to 790 +/- 90 pCi/L.

Gross beta analytical results in surface water ranged from 1.2 +/- 1.1 pCi/L to 9.6 +/- 3.1 pCi/L. Gamma spectrometry analytical results in surface water and drinking water were found very sporadically and at concentrations nominally that exceed their respective LLD.

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

- ":-- * - proe sb-htic"O iuc-and P subterranean-ias e Jjasifrom-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 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

capure inqrondwter-so some-well waterisou rces today are affected by the surface water from the 1960s that was elevated in tritium.
c. Surface Water Data Surface water level measurements were collected at the surface water monitoring locations during the groundwater level measurement event. The purpose of the surface water monitoring was to provide surface water elevation data to evaluate the groundwater/surface water interaction at the Station.

The USEPA RadNet surface water data typically has a reported 'Combined Standard Uncertainty' of 35 to 50 pCi/L.

According to USEPA, this corresponds to a +/-70 to 100 pCi/L 95% confidence bound on each given measurement.

Therefore, the typical background data provided may be subject to measurement uncertainty of approximately +/- 70 to 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. Clearly, these sample results cannot be distinguished as different from background at this concentration.

IV. Results and Discussion A. Groundwater Results Groundwater Samples were collected from on and off-site wells throughout the year in accordance with the station radiological groundwater protection program. Analytical results and anomalies are discussed below.

Tritium Samples from all locations were analyzed for tritium activity (Table B-1.1 and B-1.2, Appendix B). Tritium values ranged from the detection limit to 1,260 pCi/I. Within the station boundary,

.. c*con etrtin*s t of tritidin-Khsh-5ldgrý OdWaterreWahe-d 126Q- -

pCi/L. The existing wells at or near the owner-controlled boundary showed no tritium. The location most representative of potential offsite user of drinking water is less than the LLD.

Strontium-90 was not detected in any of the samples and the required LLD of 2.0 pCi/liter was met. (Table B-1.3 and B-1.4, Appendix B).

Gamma Emitters and Strontium No power-production gamma emitters were detected in any of the samples. Naturally occurring, potassium-40 was detected in 14 of 63 samples. The concentrations ranged from 26 pCi/liter to 195 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 Peach Bottom Atomic 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 Tritium detected in the groundwater sample MW-PB-4 is likely, a residual impact from the historical release from the Unit 3 Condensate Storage Tank (CST). An investigation into the release at the south plume is still under investigation. Rain water is sampled at station 1A, 1B and 4M.

E. Trends There were no previously identified plumes.

F. Investigations Rain water was sampled at sampling locations 1A, 1B and 4M to investigate the cause of the South plume. This release is still under investigation.

G. Actions Taken

1. Compensatory Actions There have been no station events requiring compensatory actions
2. Installation of Monitoring Wells Fourteen new monitoring wells (MW-PB-1 through MW-PB-14) were installed for the hydrogeologic investigation. These locations were selected based on a review of the available information provided by the Station, the hydrogeology at the Station, the AFEs, and the location of usable existing wells.
3. Actions to Recover/Reverse Plumes No actions were required to recover or reverse groundwater plumes.

V. References

1. Conestoga rovers and Associates, Fleetwide Assessment, Peach Bottom Atomic Power station, Delta, PA, Fleetwide Assessment, Rev.

1, September 1, 2006

2. Peach Bottom Atomic Power Station, Environs Radiation Monitoring Program, Preoperational Summary Report units 2 and 3, June 1977
3. Peach Bottom Atomic Power Station, Environs Radiation Monitoring Program, Preoperational Summary Report units 2 and 3, September 1970- August 1973, January 1974
4. AMO Environmental Decisions, January12, 2007 Report" Fall 2006 Routine Ground water and Surface water Monitoring round Summary of Results, Conclusions and Recommendations for Future Monitoring Rounds PBAPS, Delta, PA."

Intentionally left blank APPENDIX A SAMPLING LOCATIONS, DISTANCE AND DIRECTION

TABLE A-1: Radiological Groundwater Protection Program - Sampling Locations, Distance and Direction, Peach Bottom Atomic Power Station, 2006 Site Site Type Sector Distance (ft.)

MW-PB-1 Groundwater Well SW 1166.6 MW-PB-2 Groundwater Well WNW 309.0 MW-PB-3 Groundwater Well SSE 709.7 MW-PB-4 Groundwater Well ENE 350.2 MW-PB-5 Groundwater Well NNW 1146.1 MW-PB-6 Groundwater Well NE 1072.4 MW-PB-7 Groundwater Well SE 813.9 MW-PB-8 Groundwater Well SE 1167.0 MW-PB-9 Groundwater Well SE 2816.9 MW-PB-10 Groundwater Well SSE 1125.1 MW-PB-Il Groundwater Well SE 438.4 MW-PB-12 Groundwater Well NNE 317.2 MW-PB-13 Groundwater Well NW 329.4 MW-PB-14 Groundwater Well S 1231.2 PB-HAZMAT STORAGE SHED Domestic Well - Tap NNW 2527.1 PB-NORTH SUBSTATION Domestic Well - Tap WNW 2553.3 PB-SALT WASHDOWN Domestic Well - Tap WSW 2618.2 PB-SOUTH SUBSTATION Domestic Well - Tap SSE 2594.3

- ~ ýSP:PB?13-v-SP-PB-2 Seep WNW 311.6 SP-PB-3 Seep NNW 1281.1 SW-PB-i Surface Water NNW 2847.9 SW-PB-2 Surface Water ENE 1092.7 SW-PB-3 Surface Water SE 3218.9 SW-PB-4 Surface Water SE 5539.4 SW-PB-5 Surface Water SE 950.7 SW-PB-6 Surface Water SE 950.7 SW-PB-7 Surface Water S 1256.6 SW-PB-8 Surface Water SE 5591.1 A-1

0

- NRQPERTY B0UNOARY APPROXIMAItU VELL LOCAMiN

  • BNDOTELDVP1 16 ELON SPLYWELL*M. tOTABLE. WATER WELL LOCATIONS Exelon. PEACH BOTTOM ATOMIC POWER STATION EXELON GENERATION COMPANY, LLC (Delta,Pennsylvania 4513,-27(019)GN-%tAO JLR iPr Figure A-1 Well Water Locations, Peach Bottom Atomic Power Station, 2006 A-2

Figure A-2 RGPP Monitoring Locations, Peach Bottom Atomic Power Station, 2006 A-3

f Intentionally left blank

APPENDIX B DATA TABLES

TABLE B-1.1 CONCENTRATIONS OF TRITIUM IN GROUNDWATER, SEEP AND SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE MAT STORAGE SHED 05/23/06 < 178 HAZMAT STORAGE SH 11/07/06 < 193

  • MW-PB-1 05/24/06 225 +/- 113 MW-PB-1 11/07/06 233 +/- 121*

MW-PB-i RERUN 11/07/06 242 +/- 125*

MW-PB-10 05/23106 < 179 MW-PB-10 11/06/06 < 184 MW-PB-11 05/24/06 < 155 MW-PB-11 11/06/06 < 182

  • MW-PB-12 05/24/06 250 +/- 109 MW-PB-12 11/06/06 569 +/- 138*

MW-PB-12 RERUN 11/06/06 486 +/- 143*

  • MW-PB-133 05/24/06 266.+/- 115 MWPBý131 - 11/06/06: <186-~
  • MW-PB-i4 05/23/06 < 178 MW-PB-14 11/06/06 < 177
  • MW-PB-2 05/25/06 189 +/- 105 MW-PB-2 11/06/06 < 176
  • MW-PB-3 05/24/06 345 +/- 110 MW-PB-3 05/25/06 382 +/- 111 MW-PB-3 11/07/06 200 +/- 121" MW-PB-3 11/07/06 331 +/- 124*

MW-PB-3 RERUN 11/07/06 414 +/- 139*

MW-PB-4 05/24/06 575 +/- 131 MW-PB-4 11/07/06 803 +/- 146*

MW-PB-4 RERUN 11/07/06 1260 +/- 208*

MW-PB-4 11/07/06 1040 +/- 156*

MW-PB-4 RERUN 11/07/06 1110 +/- 193*

MW-PB-5 05/24/06 < 163 MW-PB-5 11/06/06 < 175

  • MW-PB-6 05/23/06 < 180 MW-PB-6 11/06/06 < 180
  • MW-PB-7 ORIG 05/24/06 < 164 MW-PB-7 DUP DUP 05/24/06 < 162 MW-PB-7 11/06/06 < 183
  • MW-PB-8 05/23/06 < 179 MW-PB-8 11/06/06 < 179
  • MW-PB-9 05/23/06 < 180 MW-PB-9 11/06/06 < 180
  • NORTH SUBSTATION 05/22/06 < 185 NORTH SUBSTATION 11/07/06 < 188
  • SALT WASHDOWN 05/22/06 < 180 SALT WASHDOWN 11/07/06 < 194
  • SOUTH SUBSTATION 05/22/06 < 178 SOUTH SUBSTATION 05/22/06 < 178 SOUTH SUBSTATION 11/07/06 < 191

SP-PB-1 RERUN 11/07/06 430 +/- 141*

  • INDICATES DISTILLED ANALYSIS B-i

TABLE B-i.1 CONCENTRATIONS OF TRITIUM IN GROUNDWATER, SEEP AND SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER + 2 SIGMA COLLECTION SITE DATE SP-PB-2 05/24/06 245 +/- 108 SP-PB-2 11/07/06 < 191

  • SW-PB-1 05/22/06 < 184 SW-PB-1 11/07/06 < 190
  • SW-PB-2 05/22/06 < 171 SW-PB-2 11/06/06 < 189 SW-PB-3 05/22/06 < 183 SW-PB-3 11/06/06 < 189 SW-PB-4 05/22/06 < 186 SW-PB-4 11/07/06 < 192 SW-PB-5. 05/22/06 < 180 SW-PB-65 A11/06/06 SW-PB-6 05/22/06 < 182 SW-PB-6 11/06/06 < 193 SW-PB-7 05/22/06 < 180

,k SW-PB-7 11/06/06 < 193 SW-PB-8 05/23/06 < 180 y,

SW-P 8-8 11/07/06 < 194

  • INDICATES DISTILLED ANALYSIS B]-2

TABLE B-1.2 HIGHEST TO LOWEST CONCENTRATIONS OF TRITIUM IN GROUNDWATER, SEEP AND SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE MW-PB-4 RERUN 11/07/06 1260 +/- 208*

MW-PB-4 RERUN 11/07/06 1110 +/- 193*

MW-PB-4 11/07/06 1040 +/- 156*

MW-PB-4 11/07/06 803 +/- 146*

MW-PB-4 05/24/06 575 +/- 131 MW-PB-12 11/06/06 569 +/- 138*

MW-PB-12 RERUN 11/06/06 486 +/- 143*

SP-PB-1 RERUN 11/07/06 430 +/- 141*

MW-PB-3 RERUN 11/07/06 414 +/- 139*

MW-PB-3 05/25/06 382 +/- 111 MW-PB-3 05/24/06 345 +/- 110 MW-PB-3 11/07/06 331 +/- 124*

. . 05/24/06-.. .278+/-- .109 MWWPBI1W3 -

MW-PB-12 05/24/06 250 +/- 109 SP-PB-2 05/24/06 245 +/- 108 MW-PB-1 RERUN 11/07/06 242 +/- 125*

MW-PB-1 11/07/06 233 +/- 121 MW-PB-1 05/24/06 225 +/- 113 SP-PB-1 11/07/06 223 +/- 124*

MW-PB-3 11/07/06 200 +/- 121*

MW-PB-2 05/25/06 189 +/- 105 SALT WASHDOWN 11/07/06 < 194

  • SW-PB-8 11/07/06 < 194
  • HAZMAT STORAGE SH 11/07/06 < 193
  • SW-PB-5 11/06/06 < 193
  • SW-PB-6 11/06/06 < 193
  • SW-PB-7 11/06/06 < 193
  • SW-PB-4 11/07/06 < 192
  • SOUTH SUBSTATION 11/07/06 < 191
  • SW-PB-i 11/07/06 < 190
  • SW-PB-2 11/06/06 < 189
  • SW-PB-3 11/06/06 < 189
  • NORTH SUBSTATION 11/07/06 < 188
  • SW-PB-4 05/22/06 < 186 MW-PB-13 11/06/06 < 185
  • NORTH SUBSTATION 05/22/06 < 185 MW-PB-10 11/06/06 < 184
  • SW-PB-1 05/22/06 < 184 MW-PB-7 11/06/06 < 183
  • SW-PB-3 05/22/06 < 183 MW-PB-11 11/06/06 < 182
  • SW-PB-6 05/22/06 < 182 MW-PB-6 05/23/06 < 180 MW-PB-6 11/06/06 < 180
  • MW-PB-9 05/23/06 < 180 MW-PB-9 11/06/06 < 180 *
  • INDICATES DISTILLED ANALYSIS B-3

I TABLE B-1.2 HIGHEST TO LOWEST CONCENTRATIONS OF TRITIUM IN GROUNDWATER, SEEP AND SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE SALT WASHDOWN 05/22/06

  • 180 SW-PB-5 05/22/06
  • 180 SW-PB-7 05/22/06 < 180 SW-PB-8 05/23/06 < 180 MW-PB-10 05/23/06 < 179 MW-PB-8 05/23/06 < 179 MW-PB-8 11/06/06 < 179 MAT STORAGE SHED 05/23/06 < 178 MW-PB-14 05/23/06 < 178 SOUTH SUBSTATION 05/22/06 < 178 SOUTH SUBSTATION 05/22/06
  • 178 MW-PB-14 11/06/06
  • 177 MW-P_2- 11/06/06
  • 1,76 MW*PB-5:.. 011/3/06  ;ý:175 SP-PB-3 05/23/06 < 173 SW-PB-2 05/22/06 < 171 MW-PB-7 ORIG 05/24/06 < 164 MW-PB-5 05/24/06 < 163 MW-PB-7 DUP DUP 05/24/06 < 162 MW-PB-11 05/24/06
  • 155
  • INDICATES DISTILLED ANALYSIS B-4

TABLE B-I.3 CONCENTRATIONS OF STRONTIUM IN GROUNDWATER, SEEP AND SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE No strontium detected B- 5

j TABLE B-I.4 HIGHEST TO LOWEST CONCENTRATIONS OF STRONTIUM IN GROUNDWATER, SEEP AND SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE No strontium detected B-6

TABLE B-I.5 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER AND SEEP SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC COLLECTION Be-7 K-40 Mn-54 Co-58 Fe-59 Co-60 . Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD SW-PB-i 05/22/06 < 44 < 54 <5 <5 < 11 <6 '< 12 <5 I

<9 <5 <6 < z( < 9 SW-PB-1 11/07/06 < 21 < 44 <2 <2 <5 <2 <4 <2 <4 <2 <2 < 36 < 15 SW-PB-2 05/22/06 < 39 < 43 <4 <5 < 10 <5 <11 <5 <8 <5 <4

  • 25 <8 SW-PB-2 11/06/06
  • 28 < 18 <2 <2 <6 <3 <4 <3 <5 <2 <2 < 47 < 14 SW-PB-3 05/22/06 < 49 < 52 <5 <6 < 11 <5 . < 12 <6 < 10 <6 <6 < 31 < 10 SW-PB-3 11/06/06 < 20 < 14 <2 <2 <5 <2 <3 <2 <4 <2 <2 < 38 < 13 SW-PB-4 05/22/06 <52 < 60 <6 <6 < 13 <5 < 14 <7 < 10 <7 <6
  • 28 < 10 SW-PB-4 11/07/06 < 20 < 41 <2 <2 <5 <2 <3 <2 <4 <1 <2 < 37 < 14 SW-PB-5 05/22/06 < 50 < 80 <6 <6 < 12 <5 < 12 <6 < 10 <6 <6 < 29 < 11 SW-PB-5 11/06/06 < 23 < 52 <2 <3 <5 <3 <3 <2 <4 <2 <2 < 45 < 13 SW-PB-6 05/22/06 < 42 < 75 <4 <5 < 10 <5 < 11 <5 <9 <6 <5 SW-PB-6 11/06/06 < 25 <8

< 20 < 56 <2 <2 <5 <2 <4 <2 <4 <2 <2  ! 42 < 13 SW-PB-7 05/22/06 < 49 < 50 <5 <5 < 11 <5 < 13 <5 < 10 <6 <6 SW-PB-7 11/06/06 < 29

  • 10

< 24 < 14 <2 <2 <4 <1 <4. <2 <4 <1 SW-PB-8 <2 < 37 < 11 05/23/06 < 44 < 50 <5 <5 < 12 <6 < 13 <5 < 10 <6 <6

  • 27 < 11 SW-PB-8 11/07/06 < 23 < 16 <2 <3 <5 <2 <<3 <3 <4 <2 <2 MW-PB-7 DUP DUP 05/24/06 < 41

< 44 < 14

< 40 <4 <5 < 10 <4 < 10 <5 <8 MW-PB-7 11/06/06

<5 <4

  • 29 < 10

< 24 < 19 <2 <2 < 6 <2 <5 <3 <5 MW-PB-8 <2 <2 < 46 < 13 05/23/06 < 47 114 +/- 53 <5 <6 < 12 <6 . < 15 <7 < 10 <8 <5 < 29 < 10 MW-PB-8 11/06/06 < 20 < 20 <2 <2 <5 <2 * <3 <2 <3 <1 <2 MW-PB-9 05/23/06 < 33 < 13

  • 29 169 +/- 33 <3 <3 <7 <3 <8 <3 <6 <4 <3
  • 17 <5 MW-PB-9 11/06/06 < 25 < 51 <2 <2 <5 <2 <3 <2 <4 <2 <2 MW-PB-10 < 43 < 13 05/23/06 < 51 < 90 <6 <6 < 12 <6 < 16 <6 <9 <8 <6
  • 29 < 10 MW-PB-10 11/06/06 < 24 < 43 <2 <2 <5 <2 <3 <2 <5 <2 <2 < 42 MW-PB-11 < 14 05/24/06 < 52 < 84 <6 <5 < 12 <6 < 15 <6 < 10 <7 <5 < 41 < 13 MW-PB-l 11/06/06 < 29 195 +/- 50 <3 <3 <6 <3 S<5 <4 <6 <2 <3
  • 52 MW-PB-12 < 12 05/24/06 < 36 44 +/- 37 <4 <4 <9 <4 <9 <4 <8 <4 <4 < 24 <9 MW-PB-12 11/06/06 < 28
  • 46 <2 <3 <6 <2 . <5 <3 <5 <2 <2
  • 48 < 15 MW-PB-13 05/24/06 <*41
  • 42 <4 <5 < 10 <4 < 10 <5 <9 <5 <5 < 31 <9 MW-PB-13 11/06/06
  • 25 26 +/- 25 <2 <3 <6 <3 <4 <3 <4 <2 <2 < 46 < 15 MW-PB-14 05/23/06 < 30 < 31 <3 <3 <7 <3 <9 <4 <6 <4 <3 < 17 <6 MW-PB-14 11/06/06 < 22 < 28 <2 <3 <6 <2 <4 <3 <5 <2 <2 < 43 < 15

TABLE B-I.5 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATERAND SEEP SAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 12006 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC COLLECTION Be-7 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-1 37 Ba-140 La-140 PERIOD HAZMAT STORAGE SHED 11/07/06 < 25 37 +/- 32 < 2 <3 < 6 <2 I < 4 <3 < 5 <2 <2 < 4b MAT STORAGE SHED 05/23/06 < 48 < 14

< 83 <5 <6 < 10 <6 . < 12 <6 <6

< 10 <5 < 27 < 10 NORTH SUBSTATION 05/22/06 < 45 < 50 <5 <5 *<10

<5  :< 11 <5 <9 <5 <6 < 27 <9 NORTH SUBSTATION 11/07/06 < 30 < 20 <2 <3 <7 <3 ,<5 <3 <5 <2 <2 SALT WASHDOWN 05/22/06 < 50 < 14

< 52 < 86 <5 <6 < 13 <7 <13 <6 <8 <6 <6 < 29 < 10 SALT WASHDOWN 11/07/06 < 27 < 44 <2 <3 <6 <3 <<4 <3 < 5 <2 <2 SOUTH SUBSTATION < 46 < 14 05/22/06 < 39 < 81 <5 <5 < 10 <5 <<13 <8

<6 <6 <5 < 26 < 10 SOUTH SUBSTATION 05/22/06 < 46 < 52 <6 <5 < 11 <5 < 14 <6 < 10 <8 SOUTH SUBSTATION <5 < 29 < 10 11/07/06 < 24 < 21 <2 < 3 <7 <2 <4 <3 <5 <2 <2 < 46 < 15 SP-PB-1 05/24/06 < 46 < 50 <5 <5 < 11 <5 <:

<12 <6 <9 <6 <5 SP-PB-i 11/07/06 < 29

< 34 < 11 192 +/- 49 <2 <2 <6 <2 < 4 <3 SP-PB-2 <4 <2 <2 < 46 < 15 05/24/06 < 46 < 47 <5 <5 < 11 <4 < 12 <6 <9 <6 <5 < 37 SP-PB-2 11/07/06 < 28 157 + 41 < 10

<2 <2 <6 <2 <4 <2 <5 SP-PB-3 <2 <2 < 43 < 15 05/23/06 < 31 153 + 40 <3 < 4 <8 <3 <7 <4 < 6 <3 <4 SP-PB-3 11/07/06 < 20

< 18 <6 35 + 26 <2 <2 <4 <2 < 4 <2 <1

<4 <2 < 39 < 13 SW-PB-i 05/22/06 < 44 < 54 <5 <5 < 11 <6 < 12 <5 <9 <5 <6 <9 SW-PB-i 11/07/06 < 27

< 21 < 44 <2 <2 <5 <2 4*4 <2 <4 <2 <2 < 36 < 15 SW-PB-2 05/22/06 < 39 < 43 <4 <5 < 10 <5 < 11 <5 <8 <5 <4 <8 SW-PB-2 11/06/06 I*.;::

< 4 < 25

< 28 < 18 <2 <2 <6 <3 < 3 <5 <2 <2 < 47 < 14 SW-PB-3 05/22/06 < 49 < 52 <5 <6 < 11 <5 < 12 <6 < 10 <6 <6 SW-PB-3 11/06/06 < 20 < 14

< 31 < 10

<2 <2 <5 <2 <3 <2 <4 SW-PB-4 <2 <2 < 38 < 13 05/22/06 < 52 < 60 <6 <6 < 13 <5 < 14 <7 < 10 <7 <6

  • 28 SW-PB-4 11/07/06 < 20 < 41 < 10

< 2 <2 <5 <2 <3 <2 <4 <1 SW-PB-5 05/22/06 < 2 < 37 < 14

< 50 < 80 <6 <6 < 12 <5 <6

< 12 < 10 <6 <6 SW-PB-5 11/06/06 < 23

< 29 < 11

< 52 <2 <3 <5 <3 <3 <2 <4 <2 <2 < 45 < 13 SW-PB-6 05/22/06 < 42 < 75 <4 <5  ::.:< 11

< 10 <5 <5 <9 <6 SW-PB-6 <5 < 25 <8

.11/06/06 < 20 < 56 <2 <2 <5 <2 <4 <2 <4 <2 <2 < 42 < 13 SW-PB-7 05/22/06 < 49 < 50 <5 <5 < 11 <5 < 13 <5 < 10 <6 <6 SW-PB-7 11/06/06 < 24 < 14

< 29 < 10

<2 <2 <4 <1 < 4 <2 <4 <1 SW-PB-8 <2 < 37 < 11 05/23/06 < 44 < 50 < 5 <5 < 12 <6 < 13 <5 < 10 <6 <6 < 27 < 11 SW-PB-8 11/07/06 < 23 < 16 <2 <3 <5 <2 <3 <3 <4 <2 <2 < 44 < 14

C'"

TABLE B-I.5 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATERSAMPLES COLLECTED IN THE VICINITY OF PEACH BOTTOM ATOMIC POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC COLLECTION Be-7 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD SW-PB-1 05/22/06 < 44 <54 < 11 <6 < 12 <9

<5 <5 < 6 < 27 < 9 SW-PB-1 11/07/06 < 21 < 44 <2 <2 <5 <2 <4 <2 <4 <2 <2 < 36 < 15 SW-PB-2 05/22/06 < 39 < 43 <4 <5 < 10 <5 < 11

<5 <8 <5 <4 < 25 <8 SW-PB-2 11/06/06 < 28 < 18 <2 <2 <6 <3 4 <3 <5 <2 <2 < 47

  • 14 SW-PB-3 05/22/06 < 49 < 52 <5 <6 < 11 <5 12 <6 < 10 <6 <6 < 31 < 10 SW-PB-3 11/06/06 < 20 < 14 <2 <2 <5 <2 <3 <2 <4 <2 <2 < 38 < 13 SW-PB-4 05/22/06 < 52 < 60 <6 <6 < 13 <5 14 <7 < 10 <7 <6 < 28 < 10 SW-PB-4 11/07/06 < 20 < 41 <2 <2 <5 <2 3 <2 <4 <1 <2 < 37 < 14 SW-PB-5 05/22/06 < 50 < 80 <6 <6 < 12 <5 < 12 <6 < 10 <6 <6 < 29 SW-PB-5 < 11 11/06/06 < 23 < 52 <2 <3 <5 <3 3 <2 < 4 <2 <2 <45 < 13 SW-PB-6 05/22/06 < 42 < 75 <4 <5 < 10 <5 11 <5 < 9 <6 <5 <25 <8 SW-PB-6 11/06/06 < 20 < 56 <2 <2 <5 <2 4 <2 < 4 <2 <2 <42 SW-PB-7 < 13 05/22/06 < 49 < 50 <5 <5 < 11 <5 < 13 <5 < 10 <6 <6 <29 < 10 SW-PB-7 11/06/06 < 24 < 14 <2 <4 <1

<2 < 4 <2 < 4 <1 <2 SW-PB-8 <37 < 11 05/23/06 < 44 < 50 <5 <5 <12 <<6 <13 <5 < 10 <6 <6 <27 < 11 SW-PB-8 11/07/06 < 23 < 16 <2 <3 <5 <2 <<3 <3 < 4 <2 <2 <44 < 14

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