ML16131A672

Annual Radiological Environmental Operating Report for 2015

ML16131A672
Person / Time
Site:	Calvert Cliffs
Issue date:	05/05/2016
From:	Laura Smith Exelon Generation Co
To:	Document Control Desk, Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation
References
Download: ML16131A672 (97)

Text

7 Larry D. Smith Exelon Generation Manager-Regulatory Assurance Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, MD 20657 410-495-5219 Office www.exeloncorp.com Larry.smith2@exeloncorp.com May 5, 2016 U. S. Nuclear Regulatory Commission ATIN: Document Control Desk Washington, DC 20555 Calvert Cliffs Nuclear Power Plant; Unit Nos. 1 & 2; Renewed Facility Operating License Nos. DPR-53 and DPR-69 Docket Nos. 50-317 & 50-318 Independent Spent Fuel Storage Installation; Material License No. SNM-2505 NRC Docket No. 72-8

Subject:

Annual Radiological Environmental Operating Report

References:

1. Calvert Cliffs Nuclear Power Plant Technical Specification 5.6.2

2. Calvert Cliffs Independent Spent Fuel Storage Installation Technical Specification 6.2 In accordance with References 1 and 2, Calvert Cliffs Nuclear Power Plant is submitting the Annual Radiological Environmental Operating Report (Attachment 1).

There are no regulatory commitments contained in this correspondence.

Should you have questions regarding this matter, please con.tact me at (410) 495-5219 or Ms. Brittney O'Connor at (410) 495-4913.

Respectfully,

~.6~

Larry D. Smith Manager-Regulatory Assurance LDS/PSF/bjm

Attachment:

(1) Annual Radiological Environmental Operating Report for the Calvert Cliffs Nuclear Power Plant Units 1 and 2 and the Independent Spent Fuel Storage Installation NRC Resident Inspector, Calvert Cliffs cc: NRC Project Manager, Calvert Cliffs NRC Regional Administrator, Region I s. Gray, MD-DNR

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ATTACHMENT (1)

ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT FOR THE CALVERT CLIFFS NUCLEAR POWER PLANT UNITS 1AND2 AND THE INDEPENDENT SPENT FUEL STORAGE INSTALLATION Calvert Cliffs Nuclear Power Plant May 5, 2016

ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT FOR THE CALVERT CLIFFS NUCLEAR POWER PLANT UNITS 1AND2 AND THE INDEPENDENT SPENT FUEL STORAGE INSTALLATION January 1 - December 31, 2015 A. M. Barnett R. V. Ihnacik EXELON GENERATION, LLC MAY2016

January 1 - December 31, 2015 Docket Nos. 50-:317/50-318/72-8 TABLE OF CONTENTS LIST OF FIGURES ............................................................................................................................ ii LIST OF TABLES ............................................................................................................................. iii I.

SUMMARY

........................................................................................................................................ 1 II. CALVERT CLIFFS NUCLEAR POWER PLANT RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ............................................................ 3 II.A. INTRODUCTION ................................................................................................................................................ 3 11.B. PROGRAM ............................................................................................................................................................ 3 11.B.1 Objectives ...................................................................................................................................................... 3 11.B.2 Sample Collection .......................................................................................................................................... 4 11.B.3 Data Interpretation ....................................................................................................................................... 4 11.B.4 Program Exceptions ...................................................................................................................................... 4 11.C. RESULTS AND DISCUSSIONS .......................................................................................................................... 4 11.C.1 Aquatic Environment .................................................................................................................................... 4 11.C.1.a Bay Water .................................................................................................................................................... 4 11.C.l.b Aquatic Organisms ..................................................................................................................................... 5 11.C.1.c Shoreline Sediment ..................................................................................................................................... 5 11.C.2 Atmospheric Environment ........................................................................................................................... 8 11.C.2.a Air Particulate Filters ........................................ :....................................................................................... 8 11.C.2.b Air Iodine ................................................................................................................................................... 8 11.C.3 Terrestrial Environment ........................................................................................................................... 10 11.C.3.a Vegetation ................................................................................................................................................. 10 11.C.4 Direct Radiation .......................................................................................................................................... 10 11.D. CONCLUSION .................................................................................................................................................... 12 III. INDEPENDENT SPENT FUEL STORAGE INSTALLATION RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM .......................................................... 18 III.A. INTRODUCTION .............................................................................................................................................. 18 111.B. PROGRAM ......................................................................................................................................................... 18 111.B.1 Objectives ................................................................................................................................................... 18 111.B.2 Sample Collection ...................................................................................................................................... 19 111.B.3 Data Interpretation ................................................................................................................................... 19 111.B.4 Program Exceptions .................................................................................................................................. 19 111.C. RESULTS AND DISCUSSIONS ...................................................................................................................... 19 111.C.1 Atmospheric Environment ....................................................................................................................... 19 111.C.1.a Air Particulate Filters ............................................................................................................................ 19 111.C.2 Terrestrial Environment .......................................................................................................................... 20 111.C.2.a Vegetation ............................................................................................................................................... 20 111.C.2.b Soils .......................................................................................................... .:............................................. 20 111.C.3 Direct Radiation ........................................................................................................................................ 21 111.D. CONCLUSION ................................................................................................................................................... 21 IV. REFERENCES ............................................................................................................................ 25 APPENDIX A Sample Locations for the REMP and the ISFSI.. ................................................. 26 APPENDIX B Analysis Results for the REMP and the ISFSI ..................................................... 35 APPENDIX C Quality Assurance Program ................................................................................... 56 APPENDIX D Land Use Survey ...................................................................................................... 73 APPENDIX E Additional Samples and Analysis Results ............................................................. 74

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 LIST OF FIGURES Figure Title Page 1 Tritium in Chesapeake Bay Water ............................................................................................. 6 2 Silver-1 lOm and Potassium-40 in Chesapeake Bay Oysters .................................................... ?

3 Nuclear Fallout in the Calvert Cliffs Area ................................................................................. 9 4 Mean TLD Gamma Dose, Calvert Cliffs Nuclear Power Plant.. ........................................... .. 11 5 Atmospheric Dispersion Around CCNPP Average Relative Air Concentrations (X/Q) ........ .14 6 Atmospheric Dispersion Around CCNPP Average Relative Ground Deposition (D/Q) ........ 15 7 Mean TLD Gamma Dose, ISFSI ............................................................................................. 22 A-1 Map of Southern Maryland and Chesapeake Bay Showing Location of Calvert Cliffs Nuclear Power Plant ................................................................................................................ 29 A-2 Calvert Cliffs Nuclear Power Plant Sampling Locations, 0-2 Miles ....................................... 30 A-3 Calvert Cliffs Nuclear Power Plant Sampling Locations, 0-10 Miles ..................................... 31 A-4 Independent Spent Fuel Storage Installation Sampling Locations ........................................... 33 A-5 Enlarged Map of the Independent Spent Fuel Storage Installation Sampling Locations ........ 34 E-1 Site Map Groundwater Monitoring Wells ............................................................................... 90 ii

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 LIST OF TABLES Table Title Page 1 Synopsis of 2015 Calvert Cliffs Nuclear Power Plant Radiological Environmental Monitoring Program ................................................................................................................. 16 2 Annual Summary of Radioactivity in the Environs of the Calvert Cliffs Nuclear Power Plant Units 1 and 2 ................................................................................................................... 17 3 Synopsis of 2015 Calvert Cliffs Nuclear Power Plant Independent Spent Fuel Storage Installation Radiological Environmental Monitoring Program ............................................... 23 4 Annual Summary of Radioactivity in the Environs of the Calvert Cliffs Nuclear Power Plant Independent Spent Fuel Storage Installation .................................................................. 24 A-1 Locations of Environmental Sampling Stations for the Calvert Cliffs Nuclear Power Plant..28 A-2 Locations of Environmental Sampling Stations for the Independent Spent Fuel Storage Installation at Calvert Cliffs .................................................................................................... 32 B-1 Concentration of Tritium and Gamma Emitters in Bay Water ................................................ 37 B-2 Concentration of Gamma Emitters in the Flesh of Edible Fish ............................................... 38 B-3 Concentration of Gamma Emitters in Oyster Samples ............................................................ 39 B-4 Concentration of Gamma Emitters in Shoreline Sediment ..................................................... .40 B-5 Concentration of Iodine-131 in Filtered Air ........................................................................... .41 B-6 Concentration of Beta Emitters in Air Particulates ........................ :........................................ .43 B-7 Concentration of Gamma Emitters in Air Particulates ...................................... ~ .................... .47 B-8a Concentration of Gamma Emitters in Vegetation Samples .................................................... .48 B-8b Concentration of Gamma Emitters in Vegetation From Locations Around the ISFSI.. ......... .49 B-9 Concentration of Gamma Emitters in Soil Samples From Locations Around the ISFSI ........ 50 B-10 Typical MDA Ranges for Gamma Spectrometry .................................................................... 51 B-11 Typical LLDs for Gamma Spectrometry ................................................................................. 52 B-12 Direct Radiation ....................................................................................................................... 53 C-1 Results of Participation in Cross Check Programs .................................................................. 58 C-2 Results of Quality Assurance Program ........................ :........................................................... 61 C-3 Teledyne Brown Engineering's Typical MDAs for Gamma Spectrometry ............................ 72 D-1 Land Use Survey ................................................................................................ *...................... 73 E-1 Locations of Non-Tech Spec Environmental Sampling Stations for Calvert Cliffs Nuclear Power Plant .............................................................................................................................. 76 E-2 Synopsis of 2015 Calvert Cliffs Nuclear Power Plant Non-Tech Spec Radiological Environmental Monitoring Program ........................................................................................ 77 E-3 Annual Summary for Calvert Cliffs Nuclear Power Plant Units 1 & 2 Non-Tech Spec Radiological Environmental Monitoring Program .................................................................. 78 E-4 Concentration of Gamma Emitters in Bottom Sediment ......................................................... 79 E-5 Concentration oflodine-131 in Filtered Air ............................................................................ 80 E-6 Concentration of Beta Emitters in Air Particulates .................................................................. 82 E-7 Concentration of Gamma Emitters in Air Particulates ............................................................ 84 E-8 Concentration of Tritium and Gamma Emitters in Taylorslsland Well Water. ....................... 85 iii

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 E-9 Direct Radiation .......................................................................................*................................ 86 E-10 Direct Radiation from Resin Storage Area .............................................................................. 87 E-11 Concentration of Tritium in Groundwater ............................................................................... 88 E-12 Gross Concentration of Gamma Emitters in Groundwater. ..................................................... 89 iv

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 I.

SUMMARY

During 2015, Calvert Cliffs Nuclear Power Plant (CCNPP) Units 1and2, a total of3460 radiological analyses were performed and the analytical results reviewed. Most of these analyses were performed to satisfy the requirements of the Offsite Dose Calculation Manual (ODCM)

(Ref. 6), the Environmental Technical Specifications (Ref. 5) and the Independent Spent Fuel Storage Installation (ISFSI) Technical Specifications (Ref. 10). Some of these samples, although not required by either the ODCM or the Technical Specifications, were collected to maintain our commitments to the surrounding community and to maintain historical continuity of the CCNPP Radiological Environmental Monitoring Program (REMP) that started in 1970. The entire monitoring program in place around CCNPP is divided into three parts: the original REMP, the ISFSI monitoring program, and the Non-ODCM Radiological Environmental Monitoring. The following paragraphs describe each of these parts in more detail.

A total of 653 radiochemical analyses were performed on 585 environmental samples and 552 thermoluminescent dosimeters (TLDs) were analyzed for ambient radiation exposure rates as part of the original REMP. These analyses were performed to satisfy the requirements of the ODCM (Ref. 6) and the Environmental Technical Specifications (Ref. 5).

For the ISFSI monitoring program, 360 radiochemical analyses were performed on 300 environmental samples, 64 of which were in common with the original REMP. In addition, 480 TLDs, 24 in common with the original REMP, were analyzed for ambient radiation exposure rates. These analyses were performed to satisfy the requirements of the ODCM (Ref. 6) and the ISFSI Technical Specifications (Ref. 10).

In addition, 608 analyses were performed on 542 additional environmental samples, and 480 additional TLDs were analyzed for ambient radiation exposure rates.

And lastly, 283 radiochemical analyses were performed on 217 quality assurance samples and 132 quality assurance TLDs were analyzed as part of an internal and external quality assurance program associated with Teledyne Brown Engineering. Laboratory intercomparison samples obtained from Environmental Resource Associates (ERA) and Analytics' Inc. were also analyzed.

Samples collected from the aquatic environment included bay water, fish, oysters, and shoreline sediment. Bay water was analyzed for tritium and gamma emitters. Fish, oysters, and shoreline sediments were analyzed for gamma emitting radionuclides.

Monitoring the atmospheric environment involved sampling the air at various locations surrounding CCNPP and the ISFSI. Air particulates and gaseous iodine were collected on glass fiber filters and charcoal cartridges, respectively. The particulate filters were analyzed for beta activity and gamma emitting nuclides. The charcoal cartridges were analyzed for airborne gaseous radioiodine.

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Samples from the terrestrial environment consisted of vegetation and soil samples collected and analyzed for gamma emitters. Vegetation samples for the original REMP were also analyzed for 1-131.

Measurements 9f direct radiation, as required by the ODCM, were performed by analyzing TLDs from forty-two locations surrounding CCNPP and the ISFSI.

Natural radioactivity was detected in essentially all 3460 radiological analyses performed. Low levels of man-made fission products were also observed in 15 of these analyses for the CCNPP REMP. All of these observations were attributed to fallout from past atmospheric weapons testing. Detailed discussions about the results of these analyses are contained in the body of this report.

To assess the plant's contribution to the radiation levels of the ambient environment, dose calculations were performed using 2015 data from the plant's effluent releases, 2015 on-site meteorological data, and appropriate pathways. The results of these dose calculations indicate:

a. a maximum thyroid dose of 2.92 x 10-2 mrem via liquid and gaseous pathways, which is about 0.039% of the acceptable limit of 75 mrem/yr as specified in 40CFR190 "Environmental Radiation Protection Standards for Nuclear Power Operations" and 10CFR72.104, "Licensing Requirements for the Independent Storage of Spent Nuclear Fuel and High-Level Radioactive Waste";

b. a maximum whole body dose of 3 .-92 x 10-2 mrem via liquid and gaseous pathways, which is about 0.157% of the acceptable limit of 25 mrem/yr as specified in both 40CFR190 and 10CFR72.104; and

c. a maximum calculated dose to all other organs via liquid and gaseous pathways was equal to 5. 78 x 10-2 mrem to the skin. This dose is about 0.231 % of the allowable limit of25 mrem/yr as specified in both 40CFR190 and 10CFR72.104.

Compared to the previous three years, a slightly"higher amount of radioactivity was released from CCNPP in 2015. This resulted in a proportionately higher calculated offsite dose. However, as indicated by the results of the station's environmental monitoring, there was no increase in radioactivity detected in environmental samples. Thus, it is concluded based upon the levels of radioactivity observed and the various dose calculations performed, that CCNPP Units 1 and 2 and the ISFSI did not cause any significant radiological impact on the surrounding environment.

2

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 II. CALVERT CLIFFS NUCLEAR POWER PLANT RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM II.A. INTRODUCTION The REMP has been conducted in the vicinity of CCNPP since the summer of 1970. The Calvert Cliffs site is an operating nuclear generating station consisting of two pressurized water reactors.

Unit 1 achieved criticality on October 7, 1974 and commenced commercial operation in May 1975. Unit 2 achieved criticality on November 30, 1976 and went into commercial operation April I, 1977. The location of the plant in relation to local metropolitan areas is shown on Figure A-1.

Results of the monitoring program for the pre-operational period have been reported in a series of documents (Ref. 1-4). The results from previous operational periods are contained in annual reports submitted to the Nuclear Regulatory Commission (NRC) as required.

Results of the monitoring program for the current operational period are included in this report.

The report presents the content of the REMP (Table 1), the sampling locations (Appendix A), the summary of the analytical results (Table 2), a compilation of the analytical data (Appendix B),

the results of the Interlaboratory Comparison Program and the Quality Assurance Program (Appendix C), the results of the Land Use Survey (Appendix D), and a compilation of the analytical data for extra samples collected (Appendix E). Interpretation of the data and conclusions are presented in the body of the report.

The environmental surveillance data collected during this reporting period were compared with that generated in previous periods whenever possible to evaluate the environmental radiological impact ofCCNPP Units 1and2.

II.B. PROGRAM Il.B.1 Objectives The objectives of the REMP for the Calvert Cliffs Nuclear Power Plant are:

a. To verify that radioactivity and ambient radiation levels attributable to plant operation are within the limits specified in the ODCM (Ref. 6) and the Environmental Radiation Protection Standards as stated in 40CFR190,

b. To detect any measurable buildup oflong-lived radionuclides in the environment,

c. To monitor and evaluate ambient radiation levels, and

d. To determine whether any statistically significant increase occurs in the concentration of radionuclides in important pathways.

3

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 11.B.2 Sample Collection The locations of the individual sampling stations are listed in Table A-1 and shown in Figures A-2 and A-3. All samples were collected by contractors to, or personnel of Exelon Generation, according to CCNPP Procedures (Ref. 7, 8 and 12).

11.B.3 Data Interpretation Many results in environmental monitoring occur at or below the minimum detectable activity (MDA). In this report, all results at or below the relevant MDA are reported as being "less than" the MDA value.

11.B.4 Program Exceptions There were no program exceptions.

11.C. RESULTS AND DISCUSSIONS All the environmental samples collected during the year were analyzed using Exelon Industrial Services laboratory procedures (Ref. 8) with the exception of Tritium analyzed by Gel Laboratories LLC. (Ref. 14). The analytical results for this reporting period are-presented in Appendix Band are also summarized in Table 2. For discussion, the analytical results are divided into four categories. The categories are the Aquatic Environment, the Atmospheric Environment, the Terrestrial Environment, and Direct Radiation. These categories are further divided into subcategories according to sample type (e.g., Bay Water, Aquatic Organisms, etc.,

for the Aquatic Environment).

• 11.C.1 Aquatic Environment The aquatic environment surrounding the plant was monitored by analyzing samples of bay water, aquatic organisms, and shoreline sediment. These samples were obtained from various sampling locations on the Chesapeake Bay near the plant.

11.C.1.a Bay Water Monthly bay water samples were taken from two locations during the year. These locations are the Intake Area (sample code WAl) and the Discharge Area (sample code WA2). Composite samples were obtained from each location for the entire sampling period. These samples were analyzed for tritium and gamma emitters as shown in Table B-1.

The tritium analyses, performed on quarterly composites of the monthly bay water samples, revealed no evidence of tritium in any of the samples taken from either site throughout the year.

Figure 1 compares tritium observed in the plant discharge and intake with annual effluent releases as reported in the Radioactive Effluent Release Report.

4

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Monthly analyses of bay water samples from both locations for gamma emitters exhibited no detectable concentrations of any plant-related radioi:mclides.

11.C.1.b Aquatic Organisms Twelve samples of aquatic organisms were obtained from four locations during the year.

Samples of fish, when in season, are normally collected from the Discharge Area (sample codes IAl and IA2) and from the Patuxent River (sample codes IA4 and IA5). As shown in Table B-2, two species of fish were sampled at both the plant discharge and the control point in the Patuxent River. Oyster samples were obtained quarterly from Camp Conoy (sample code IA3) and Kenwood Beach (IA6) as shown in Table B-3.

Figure 2 compares K-40 and Ag-1 lOm observed in oysters from Camp Conoy (IA3) with annual effluent releases of Ag-11 Om as reported in the Radioactive Effluent Release Report.

Edible portion of the fish and oyster samples were analyzed for gamma emitters.

Gamma spectrometric analyses of the fish exhibited naturally occurring K-40 but no detectable concentrations of any plant-related radionuclides. Oyster samples likewise exhibited naturally occurring K-40 but no detectable concentrations of any plant-related radionuclides.

11.C.1.c Shoreline Sediment Semiannual shoreline sediment samples are taken from one location during the year. This location is Shoreline at Barge Road (sample code WBl). The semiannual shoreline sediment samples obtained from this location were analyzed for gamma emitters.

Gamma spectrometric analyses of these samples exhibited naturally occurring radionuclides, but no detectable concentration of any plant-related radionuclides, as shown in Table B-4.

5

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 FIGURE 1 Tritium in Chesapeake Bay Water 1200 -

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January 1 - December 31, 201S Docket Nos. S0-317/S0-318/72-8 11.C.2 Atmospheric Environment The atmospheric environment was monitored by analyzing air particulate filters and charcoal cartridges (for trapping radioiodine species). These samples were collected from five locations surrounding the plant. These locations are On Site before the Entrance to Camp Conoy (sample code Al), Camp Conoy Road at the Emergency Siren (sample code A2), Bay Breeze Road (sample code A3), Route 76S at Lusby (sample code A4), and at the Emergency Operations Facility (sample code AS).

11.C.2.a Air Particulate Filters Weekly composite air particulate filter samples were collected from the five locations during the year. These samples were analyzed for beta activity and gamma emitters.

Weekly analyses for beta activity on air particulate filters collected from all five locations showed values characteristic of background levels. The values ranged from 0.7 x 10-2 to 4.7 x 10-2 pCi/m3 for the indicator locations and 0.8 x 10-2 to 4.7 x 10-2 pCi/m3 at the control location, as shown in Table B-6. The location with the highest overall mean of 2.1 x10-2 pCi/m3 was AS, Emergency Offsite Facility, the control location, and the mean for indicator locations was 2.0 x 10-2pCi/m3, as shown in Table 2.

Gamma spectrometric analyses of monthly composited air particulate samples exhibited no detectable concentrations of any plant-related radionuclides in any of these samples, as shown in Table B-7. Naturally occurring radionuclides, such as Be-7, were detected in nearly all samples.

Figure 3 depicts the historical trends of beta activity.

11.C.2.b Air Iodine Weekly composited charcoal cartridges (for trapping radioiodine species) were collected from the five locations during the year. These samples were analyzed for radioiodine species. '

Weekly radioiodine analyses of charcoal cartridges collected from all five locations exhibited no detectable concentrations ofl-131, as shown in Table B-S.

Figure 3 depicts the historical trends of radioiodine.

8

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 FIGURE 3 Nuclear Fallout in the Calvert Cliffs Area SURFACE AIR VAPORS, LUSBY, MD (A4) 250 ATMOSPHERIC FALLOUT From Chernobyl c;) 200

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January l - December 31 , 2015 Docket Nos. 50-317/50-318172-8 11.C.3 Terrestrial Environment The terrestrial environment was monitored by analyzing samples of vegetation collected monthly, when available, from various sampling locations near the plant during the normal growing season.

11.C.3.a Vegetation Vegetation samples were collected from three locations during the year. These locations are Garden Plot off Bay Breeze Road (sample codes IBl , IB2 , and IB3), On Site before the Entrance to Camp Conoy (sample codes IB4, IB5, and IB6), and the Emergency Operations Facility (sample codes IB7, IB8, and IB9) . These samples were analyzed for gamma emitters, including analyses for I-131, as shown in Table B-8a.

All samples showed detectable amounts of naturally occurring K-40 and Be-7. No plant related radionuclides were found in any of these samples.

11.C.4 Direct Radiation Direct radiation is measured by a network of TLDs in each overland sector surrounding the Plant both at the plant boundary and at 4 miles from the Plant.

TLDs were collected quarterly from twenty-three locations surrounding the plant. The twenty indicator locations are On Site Along the Cliffs (sample code DRl), Route 765 Auto Dump (sample code DR2), Giovanni's Tavern (sample code DR3), Route 765 across from White Sands Drive (sample code DR4), John's Creek (sample code DRS), Lusby (sample code DR6), On Site before the Entrance to Camp Conoy (sample code DR7), On Site at Emergency Siren (sample code DR8), Bay Breeze Road (sample code DR9), Decatur and Calvert Beach Roads (sample code DRlO), Dirt Road off Mackall and Parran Roads (sample code DRl 1), Mackall and Bowen Roads (sample code DR12), Wallville (sample code DR13), Rodney Point (sample code DR14),

Mill Bridge and Turner Roads (sample code DR15), Appeal School (sample code DR16), Cove Point and Little Cove Point Roads (sample code ORI 7), Cove Point (sample code DR18), Long Beach (sample code DRl 9), and On Site Near Shore (sample code DR20) . The three control locations are the Emergency Operations Facility (sample code DR21), Solomons Island (sample code DR22), and Taylors Island, Anderson ' s Property (sample code DR23) .

At REMP locations the mean 90 day ambient radiation measured at the indicator locations was 12.01 mR and ranged from 9.63 to 15.39 mR as reported in Table 2. The control locations showed a 90 day mean of 13.46 mR with ranges from 11.24 to 16.55 mR. The location with the highest overall mean of 16.18 was Taylors Island, Anderson's Property (sample code DR23) which ranged from 15.68 to 16.55 mR. Figure 4 shows the historical comparison of the average monthly radiation levels per calendar year for TLDs on site, at four miles, and at the control locations. A comparison of the means and ranges of the current TLD data with those of both the historical data and the regional data shows no plant-related contribution to the measured direct radiation exposure.

10

January 1 - December 31 , 2015 Docket Nos. 50-317 /50-318/72-8 FIGURE 4 Mean TLD Gamma Dose, Calvert Cliffs Nuclear Power Plant 6 -+- 4 M il es (DRl0-18)

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January 1 - December 31 , 2015 Docket Nos. 50-317 /50-318/72-8 11.D. CONCLUSION No man-made fission or activation by-products attributable to plant operations were observed in the environment surrounding the plant during the year.

Historical trends for tritium in bay water, Ag-1 lOm and K-40 in oyster samples, nuclear fallout in the Calvert Cliffs area, and TLD data are depicted in Figures 1 through 4. As can be seen from these figures, the plant made no adverse radiological contributions to the surrounding environment.

To assess the plant's contribution to the ambient radiation levels of the surrounding environment, dose calculations were performed using the plant's 2015 effluent release data, on site meteorological data (see X/Q and D/Q values presented in Figures 5 and 6), and appropriate pathways. The results of these dose calculations indicate:

Gaseous Pathways A maximum thyroid dose of 1.39 x l 0- 3 mrem to a child via the plume, ground, vegetable, and inhalation pathways at 1.1 km SW of the containments at Calvert Cliffs. This is about 0.002% of the acceptable limit of75 mrern/yr as specified in 40CFR190 and 10CFR72.104.

A maximum whole body gamma dose of 4.34 x 10-4 mrem to a child at 1.1 km SW of the containments at Calvert Cliffs. This is about 0.002% of the acceptable dose limit of 25 mrern/yr as specified in 40CFR190 and 10CFR72.104.

A maximum dose to any other organ, in this case the skin, of 5 .14 x 10-4 mrem to a child at 1.1 km SW of the containments at Calvert Cliffs. This is about 0.002% of the acceptable dose limit of 25 mrern/yr as specified in 40CFR190 and 10CFR72.104.

Liquid Pathways A maximum thyroid dose of 2.78 x 10-2 mrem to a teen for all liquid pathways, which is about 0.037 % of the acceptable dose limit of 75 mrern/yr as specified in 40CFR190 and 10CFR72.104.

A maximum whole body dose of 3.88 x 10-2 mrem to a teen via all liquid pathways, which is about 0.155 % of the acceptable dose limit of 25 mrern/yr as stated in 40CFR190 and 10CFR72.104.

A maximum dose to any other organ, in this case liver, of 5.73 x 10-2 mrem to a teen for all pathways, which is 0.229% of the acceptable dose limit of 25 mrern/yr specified in 40CFR190 and 10CFR72.104.

12

January 1 - December 31, 2015 Docket Nos. 50-317 /50-318172-8 Gaseous and Liquid Pathways Combined A maximum thyroid dose of 2.92 x io- 2 mrem via liquid and gaseous pathways, which is about 0.039% of the acceptable limit of75 mrem/yr as specified in 40CFR190 and 10CFR72.104.

A maximum whole body gamma dose of 3.92 x 10-2 mrem via liquid and gaseous pathways, which is about 0.157% of the acceptable limit of 25 mrem/yr as specified in 40CFRI 90 and 10CFR72.104.

A maximum calculated dose to all other organs via liquid and gaseous pathways was equal to

5. 78 x 10-2mrem to the skin. This dose was about 0.231 % of the allowable limit of 25 mrem/yr as specified in 40CFR190 and 10CFR72.104.

In all cases, the calculated doses are a small fraction of the applicable limits specified in 40CFR190 and 10CFR72.104.

Therefore, it is concluded that the operation of Calvert Cliffs Units 1 and 2 produced radioactivity and ambient radiation levels significantly below the limits of the ODCM, 40CFR190, and 10CFR72.104. There was no significant buildup of plant-related radionuclides in the environment due to the operation of the CCNPP in 2015.

13

January 1 - December 31 , 2015 Docket Nos. 50-317/50-318/72-8 FIGURE 5 Atmospheric Dispersion Around CCNPP Average Relative Air Concentrations (X/Q)

X/Q Sec/mA3

• ~ ~

\t \..

lvert Cliffs 2015.

14

January 1 - December 31 , 2015 Docket Nos. 50-317/50-318172-8 FIGURE 6 Atmospheric Dispersion Around CCNPP Average Relative Ground Deposition (D/Q) 15

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table 1 Synopsis of 2015 Calvert Cliffs Nuclear Power Plant Radiological Environmental Monitoring Program Sample Type Sampling Number of Number Analysis Analysis Number 1

Frequency1 Locations Collected Frequency Analyzed Aquatic Environment Bay Water, Surface MC 2 24 Gamma MC 24 Water, Drinking Water H3 QC 8 2

Fish A 4 4 Gamma A 4 Oysters Q 2 8 Gamma Q 8 Shoreline Sediment SA 2 Gamma SA 2 Atmospheric Environment Air lodine 3

w 5 260 1-131 w 260 Air Particulates 4

w 5 260 Gross Beta w 260 Gamma MC 60 Direct Radiation Ambient Radiation Q 23 552 TLD Q 552 Terrestrial Environment 5 3. M 27 Vegetation M 27 Gamma 1

W=weekly, M=monthly, Q=quarterly, SA=semiannual, A=annual, C=composite 2

Once in Season, July through September 3

The collection device contains Charcoal 4

Beta counting is performed after >72 hour decay, Gamma spectroscopy performed on monthly composites of weekly samples 5

Monthly during growing season when available 16

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table 2 Annual Summary of Radioactivity in the Environs of the Calvert Cliffs Nuclear Power Plant Units 1 and 2 Medium or Type and Total Lower Limit of Indicator Location with Highest Annual Control Locations Pathway Sampled Number of Detection (LLD} Locations Mean Highest Annual Mean (F) I Range 1 Mean (F)/Range 1

(Unit of Analyses (F)/Range Mean Measurement) Performed Name/Distance &

Direction 2 Atmospheric Environment Air Particulates Gross Beta (260) 0.5 2.0 (208/208) EOFA5 2.1 (52/52) 2.1 (52/52)

(10*2 pCi/m 3 ) (0.7-4.7) 19.3 km WNW (0.8-4.7) (0.8-4.7)

Direct Radiation Ambient Radiation TLD (552) 12.01 (480/480) Taylors Island 16.18 (24/24) 13.46 (72/72)

(mR/90 days) (9.63-15.39) DR23 (15.68-16.55) (11.24-16.55) 12.6 km ENE 1

Mean and range based upon detectable measurements only. Fraction (F) of detectable measurements at specified location is indicated in parentheses.

2 Distance and direction from the central point between the two containment buildings. .

17

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 III. INDEPENDENT SPENT FUEL STORAGE INSTALLATION RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM III.A. INTRODUCTION In August 1990 BGE initiated a program of additional radiological environmental monitoring around the site for the Independent Spent Fuel Storage Installation (ISFSI). The first dry fuel storage canister was loaded into the ISFSI in November of 1993 with more canisters being loaded in subsequent years. During 2015, two additional canisters of spent fuel were transferred to the ISFSI.

Results of the monitoring program for the ISFSI for the current period are included in this report.

This report presents the content of the ISFSI REMP (Table 3), the ISFSI sampling locations (Appendix A), the summary of the analytical results of the period (Table 4), and a compilation of the analytical data for the period (Appendix B). Interpretation of the data and conclusions are presented in the body of the report.

The ISFSI monitoring program is as described in this section of the report.

The results were compared with that generated during the previous ISFSI pre-operational periods (Ref.11) and the current and previous CCNPP REMP periods. These results are discussed in more detail in Section III. C.

111.B. PROGRAM 111.B.1 Objectives The objectives of the radiological environmental monitoring program for the ISFSI are:

a. To satisfy the community concern regarding the impact of the ISFSI on the environment,

b. To verify that radioactivity and ambient radiation levels attributable to operation of the ISFSI are within the limits specified in the Environmental Radiation Protection Standards as stated in 40CFRPartl90 and 10CFR72.104,

c. To detect any measurable buildup oflong-lived radionuclides in the environment due to the ISFSI,

d. To monitor and evaluate ambient radiation levels around the ISFSI, and

e. To determine whether any statistically significant increase occurs in the concentration of radionuclides near the ISFSI.

18

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 llI.B.2 Sample Collection The locations of the individual sampling sites are listed in Table A-2 and shown in Figures A-4 and A-5. All samples were collected by contractors to, or personnel of, Exelon Industrial Services personnel according to Exelon Industrial Services Laboratory Procedures (Ref. 7, 8, 12).

Ill.B.3 Data Interpretation Many results in environmental monitoring occur at or below the minimum detectable activity (MDA). In this report, all results at or below the relevant MDA are reported as being "less than" the MDA value.

llI.B.4 Program Exceptions There were no program exceptions during this operating period.

llI.C. RESULTS AND DISCUSSIONS All the environmental samples collected were analyzed using Exelon Industrial Services laboratory procedures (Ref. 8). The analytical results for this reporting period are presented in Appendix Band are also summarized for the period in Table 4. For discussion, the analytical results are divided into three categories. The categories are the Atmospheric Environment, the Terrestrial Environment, and Direct Radiation. These categories are further divided into subcategories according to sample type (e.g., Vegetation and Soil for Terrestrial Environment).

Ill.C.1 Atmospheric Environment The atmospheric environment was monitored by analyzing air particulate filters. These samples were collected from five locations surrounding the ISFSI.

No source of airborne radioiodine exists for the ISFSI. Airborne radioiodine is, therefore, not considered in assessing the radiological impact of the ISFSI.

Ill.C.1.a Air Particulate Filters Weekly composite air particulate filter samples were collected from five locations during the period. These locations are On Site before the Entrance to Camp Conoy (sample code Al; in common with the CCNPP REMP), Meteorological Station (SF Al), CCNPP Visitor's Center (SFA2), NNW of the ISFSI (SFA3), and SSE of the ISFSI (SFA4). These samples were analyzed for beta radioactivity, as shown in Table B-6 and gamma emitting radionuclides, as shown in Table B-7.

19

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Weekly analyses for beta activity on air particulate filters collected from all five locations showed values characteristic oflevels routinely observed in the REMP. As shown in Table 4, these values ranged from 0.7 x 10-2 to 4.7 x 10-2 pCi/m3 for the indicator locations and 0.7 x 10-2 to 4.3 x 10-2 pCi/m3 for the control location. The location with the highest overall mean of 2.0 x 10"2 pCi/m3 was SFA2, Visitors Center.

Gamma spectrometric analyses of monthly composited air particulate samples exhibited no detectable concentrations of any plant-related radionuclides in any of these samples. Naturally occurring radionuclides, such as Be-7, were detected in nearly all samples.

111.C.2 Terrestrial Environment The terrestrial environment was monitored by analyzing samples of vegetation and soil collected quarterly from the vicinity of the air sampling locations for the ISFSI.

111.C.2.a Vegetation Vegetation samples were collected quarterly from five locations during the year. These locations are: Meteorological Station (sample code SFBl), CCNPP Visitor's Center (sample code SFB2),

NNW of the ISFSI (sample code SFB3), SSE of the ISFSI (sample code SFB4), and On Site before the Entrance to Camp Conoy (sample code SFB5).

Vegetation samples were analyzed for gamma emitting radionuclides, as shown in Table B-8b.

Cesium-137 was detected in two samples at an indicator location. The Cs-137 concentration was 51+/-30 pCi/kg on 03/16/2015 and 192 +/- 45pCi/kg on 10/27/2015, both at On Site before the Entrance to Camp Conoy (sample code SFB5). While the presence of Cs 137 in these samples may be plant-related, this range is consistent with that found to be due to the residual fallout from past atmospheric nuclear weapons testing. The activities of this radionuclide are well below the federal limits established in 40CFR190 and 10CFR72.104. The$e results are comparable to those observed in previous annual reporting periods for the CCNPP REMP and in the earlier pre-operational data for the ISFSI. No detectable concentrations of plant-related radionuclides were found in any of these samples. Naturally occurring radionuclides such as K-40 were detected in all samples.

111.C.2.b Soils Soil samples were collected quarterly from five locations surrounding the ISFSI in the vicinity of the air samplers. These locations are: Meteorological Station (sample code SFSl), CCNPP Visitor's Center (sample code SFS2), NNW of the ISFSI (sample code SFS3), SSE of the ISFSI (sample code SFS4), and On Site before the Entrance to Camp Conoy (sample code SFS5).

Soil samples were analyzed for gamma emitting radionuclides, as shown in Table B-9. Cesium-137 was detected in ten quarterly samples from both indicator and control locations. The Cs-137 concentrations ranged from 49 +/- 29 to 171 +/- 51 pCi/kg. While the presence of Cs 13 7 in these samples may be plant-related, this range is consistent with that found to be due to the residual fallout from past atmospheric nuclear weapons testing. The activities of this radionuclide are well below the federal limits established in 40CFR190 and 10CFR72.104. These are comparable 20

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 to those observed in previous annual reporting periods for the CCNPP REMP and in the earlier pre-operational data for the ISFSI. No detectable concentrations of plant-related radionuclides were found in any of these samples. Naturally occurring radionuclides such as K-40 were also detected in all these samples.

111.C.3 Direct Radiation Direct radiation is measured by a network ofTLDs surrounding the ISFSI. These TLDs are collected quarterly from nineteen locations surrounding the ISFSI, plus one control TLD location at the Visitor's Center (sample code SFDR7). The locations include On Site before the Entrance to Camp Conoy (sample code DR7, common to both the CCNPP Program and the ISFSI Program) and the Meteorological Station (sample code DR30, previously a location maintained for historical continuity.) The other sampling locations are: SW ofISFSI, (sample code SFDRl); NNW ofISFSI, (sample code SFDR2); North ofISFSI, (sample code SFDR3); NE of ISFSI, (sample code SFDR4); East ofISFSI, (sample code SFDR5); ESE ofISFSI, (sample code SFDR6); NNW ofISFSI, (sample code SFDR8); SSE ofISFSI, (sample code SFDR9); NW of ISFSI, (sample code SFDRlO); WNW ofISFSI, (sample code SFDRl 1); WSW ofISFSI, (sample code SFDR12); South ofISFSI, (sample code SFDR13); SE ofISFSI, (sample code SFDR14); ENE ofISFSI, (sample code SFDR15); SSW ofISFSI, (sample code SFDR16); NNE ofISFSI, (sample code SFDRl 7) and West ofISFSI, (sample code SFDR18). Sampling locations are shown on Figures A-4 and A-5.

• The mean 90 day ambient radiation measured at the ISFSI indicator locations was 28.39 mR and ranged from 10.45 to 46.36 mR, as shown in Table 4. The control location showed a 90 day mean of 12.88 mR and ranged from 12.34 to 13.44 mR. The location with the highest overall mean of 44.01 mR with a range of 41.09 to 46.29 mR was SFDR18, West ofISFSI. These.

readings are consistent with those expected from the storage of spent fuel in the ISFSI. A comparison of the average monthly radiation levels per calendar year of the ISFSI TLD data from the indicator locations with the ISFSI control location at the Visitor's Center, SFDR7, can be seen in Figure 7.

IllD. CONCLUSION Low levels of Cs-13 7 were observed in the environment surrounding the ISFSI during the period. The Cs-13 7 observations were attributed to fallout from past atmospheric weapons testing. No plant-related radionuclides were observed in the environs of the ISFSI.

In general, the results in the following tables continue the historical trends previously observed at the official sites of the CCNPP REMP.

21

January 1 - December 3 1, 2015 Docket Nos. 50-3 17 /50-3 18172-8 FIGURE 7

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __Mean TLD Gamma Dose, ISFSI 12

--+-- Control Location (SFDR7)

- - - ISFSI Mean (DR7 , SFDRl-6, 8- 18) 10 8

V) ro

"'O

~ 6 0:::

E 2

0 0 N \.() Cl() 0 N <:t \.() Cl() 0 N \.()

O'l O'l O'l O'l 0 0 0 0 0 rl rl rl Calendar Year 22

January 1 - December 31 , 2015 Docket Nos. 50-317150-31 8/72-8 Table 3 Synopsis of 2015 Calvert Cliffs Nuclear Power Plant Independent Spent Fuel Storage Installation Radiological Environmental Monitoring Program Sample Type Sampling Number of Number Analysis Analysis Number 1 1 Frequency Locations Collected Frequency Analyzed Atmospheric Environment Air Particulates 2

w 5 260 Gross Beta w 260 Gamma MC 60 Direct Radiation Ambient Radiation Q 20 480 TLD Q 480 Terrestria l Environment Vegetation Q 5 20 Gamma Q 20 Soil Q 5 20 Gamma Q 20 1

W=weekly, M=monthl y, Q=quarterl y, SA=semiannual, A=annual, C=composite 2

Beta counting is perfor med after >72 hour decay, Gamma spectroscopy perfo rmed on monthl y composites of weekly samples 23

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table 4 Annual Summary of Radioactivity in the Environs of the Calvert Cliffs Nuclear Power Plant Independent Spent Fuel Storage Installation Medium or Type and Total Lower Limit of Indicator Location with Highest Annual Control Locations 1

Pathway Sampled Number of Detection (LLD) Locations Mean Highest Annual Mean (F) I Range Mean (F)/Range (Unit of Analyses 1 Mean Measurement) Performed (F)/Range Name/Distance &

2 Direction Atmospheric Environment Air Particulates Gross Beta (260) 0.5 2.0 (208/208) Visitors Center 2.0 (52/52) 2.0 (52/52)

(10-2 pCi/m 3 ) (0.7-4.7) SFA2 (0 .7-4.3) (0.7-4.3) 0.7 km NNE Direct Radiation Ambient Radiation TLD (480) 28.39 (456/456) West of ISFSI 44.01 (24/24) 12.88 (24/24)

(mR/90 days) (10.45-46.36) SFDR18 (41 .09-46 .29) (12.34-13.44) 0.1 km W Terrestrial Environment Vegetation Gamma (20) 27 122 (2/16) On Site Before 122 (2/4)

(pCi/L) Cs- 137 (51-192) Entrance to Camp (51-192)

Conoy SFB5 0.7 km ESE Soil Gamma (20) 17 125 (6/16) Entrance to Camp 136 (4/4) 61 (4/4)

(pCi/kg) Cs-137 (58-171) Conoy SFS5 (101-171) (49-71) 0.7 km ESE 1

Mean and range based upon detectable measurements on ly. Fraction (F) of detectable measurements at specified location is indicated in parentheses.

2 Distance and direction from the central point between the two contai nment buildings.

24

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 IV. REFERENCES (1) Cohen, L. K., "Preoperational Environmental Radioactivity Monitoring Program at Calvert Cliffs Units 1 and 2, NUS No. 882 Semiannual Report January-June 1971 , December 1971; NUS No . 1025 Annual Report 1971 , March 1973.

(2) Cohen, L. K., "Preoperational Environmental Radioactivity Monitoring Program at Calvert Cliffs Units 1 and 2", NUS No. 1137 Annual Report 1972, December 1973 .

(3) Cohen, L. K. and Malmberg, M.S ., "Preoperational Environmental Radioactivity Monitoring Program at Calvert Cliffs Units 1 and 2", NUS No. 1188, Annual Report 1973 ,

October 1974.

(4) Malmberg, M. S., "Preoperational Environmental Radioactivity Monitoring Program at Calvert Cliffs Units 1 and 2, NUS No. 1333, Data Summary Report, September 1970 to September 1974, July 1975 (5) Calvert Cliffs Nuclear Power Plant, Units 1 and 2, License Nos. DPR-53 and DPR-69, Technical Specification 5.6.2 ; Annual Radiological Environmental Operating Report.

(6) Offsite Dose Calculation Manual for the Calvert Cliffs Nuclear Power Plant.

(7) CP-234, Specification and Surveillance for the Radiological Environmental Monitoring Program.

(8) Exelon Industrial Services Quality Assurance Program Manual (9) Constellation Energy Nuclear Group, "Land Use Survey Around Calvert Cliffs Nuclear Power Plant, August 2015."

(10) Calvert Cliffs Independent Spent Fuel Storage Installation Technical Specifications, Appendix A to Materials License SNM-2505 (11) Baltimore Gas and Electric Company, Radiological Environmental Monitoring Program Pre-Operational Report for the Calvert Cliffs Independent Spent Fuel Storage Installation, August 1990 - November 1993 , February 1994.

(12) CP-501 , Liquid and Steam Sampling Techniques (13) CY-AA-170-1000, Radiological Environmental Monitoring Program (REMP) and Meteorological Program Implementation.

(14) GEL 2015 Annual Quality Assurance Report for the Radiological Environmental Monitoring Program (REMP) 25

January 1 - December 31 , 2015 Docket Nos. 50-317/50-318/72-8 APPENDIX A Sample Locations for the REMP and the ISFSI Appendix A contains information concerning the environmental samples which were collected during this operating period.

Sample locations and specific information about individual locations for the CCNPP REMP are given in Table A-1. Figure A-1 shows the location of the CCNPP in relation to Southern Maryland and the Chesapeake Bay. Figures A-2 and A-3 show the locations of the power plant sampling sites in relation to the plant site at different degrees of detail.

Sample locations and specific information about individual locations for the ISFSI radiological environmental monitoring program are given in Table A-2. Figures A-4 and A-5 show the locations of the ISFSI sampling sites in relation to the plant site at different degrees of detail.

26

January 1 - December 31, 2015 Docket Nos. 50-317 /50-318/72-8 TABLE OF CONTENTS-SAMPLING LOCATIONS A-1 Locations of Environmental Sampling Stations for the Calvert Cliffs Nuclear Power Plant..28 A-2 Locations of Environmental Sampling Stations for the Independent Spent Fuel Storage Installation at Calvert Cliffs ... .. ... ... ... .. ... ....... .. .... ..... ... .. ..... .. ..... ...... ... ......... ... ....................... ... 32 A-1 Map of Southern Maryland and Chesapeake Bay Showing Location of Calvert Cliffs Nuclear Power Plant .. ... ........ ....... .. .... .. .. ... .................... ......... ....... .... ............. .. .... ................... .29 A-2 Calvert Cliffs Nuclear Power Plant Sampling Locations, 0-2 Miles ... .... ...... .......................... 30 A-3 Calvert Cliffs Nuclear Power Plant Sampling Locations, 0-10 Miles ...... ... ...... .. .... ... .... ..... .... 31 A-4 Independent Spent Fuel Storage Installation Sampling Locations .. ................ ..... ..... .............. 33 A-5 Enlarged Map of the Independent Spent Fuel Storage Installation Sampling Locations ... ... ..34 27

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 TABLE A-1 Locations of Environmental Sampling Stations for the Calvert Cliffs Nuclear Power Plant 1 1 Distance Direction Station Description (KM) (Miles) (Sector)

A1 2

On Site Before Entrance to Camp Conoy 0.7 0.4 s A2 Camp Conoy Rd , at emergency siren 2.5 1.6 SSE A3 Bay Breeze Rd 2.6 1.6 SE A4 Route 765, Lusby 2.9 1.8 SSW A5 Emergency Operations Facility 19.3 12.0 WNW DR01 On Site, along Cliffs 0.6 0.4 NW DR02 Route 765, Auto Dump 2.7 1.7 WNW DR03 Route 765 , Giovanni's Tavern (Knotty Pine) 2.3 1.4 w DR04 Route 765 , White Sands Drive 2.0 1.2 WSW DR05 Route 765 , John's Creek 2.4 1.5 SW DR06 Route 765 , Lusby 2.9 1.8 SSW DR07 2

On Site Before Entrance to Camp Conoy 0.7 0.4 s OROS Camp Conoy Rd at Emergency Siren 2.5 1.6 SSE DR09 Bay Breeze Rd 2.6 1.6 SE DR10 Calvert Beach Rd and Decatur Street 6.4 4.0 NW DR11 Dirt road off Mackall & Parren Rd 6.6 4.1 WNW DR12 Mackall & Bowen Rds 6.7 4.2 w DR13 Mackall Rd , near Wallville 6.1 3.8 WSW DR14 Rodney Point 6.4 4.0 SW DR15 Mill Bridge & Turner Rds 6.2 3.9 SSW DR16 Across from Appeal School 6.5 4.0 s DR17 Cove Point & Little Cove Point Rds 5.9 3.7 SSE DR18 Cove Point 7.1 4.4 SE DR19 Long Beach 4.4 2.7 NW DR20 On site, near shore 0.4 0.2 NNW DR21 Emergency Operations Facility (EOF) 19.3 12.0 WNW DR22 Solomons Island 12.5 7.8 s DR23 Taylors Island , Anderson 's Property 12.6 7.8 ENE IA1 Discharge Area 0.3 0.2 N IA10 Hog Island 15.3 9.5 SSE IA2 Discharge Vicinity 0.3 0.2 N IA3 Camp Conoy 0.9 0.6 E IA4 Patuxent River 0.0 0.0 Various IA5 Patuxent River 0.0 0.0 Various IA6 Kenwood Beach 10.7 6.7 NNW IB1 Garden Off Bay Breeze Rd 2.6 1.6 SSE IB2 Garden Off Bay Breeze Rd 2.6 1.6 SSE IB3 Garden Off Bay Breeze Rd 2.6 1.6 SSE IB4 On site, before entrance to Camp Conoy 0.7 0.4 s IB5 On site, before entrance to Camp Conoy 0.7 0.4 s IB6 On site, before entrance to Camp Conoy 0.7 0.4 s IB7 Emergency offsite facility 19.3 12.0 WNW IB8 Emergency offsite facility 19.3 12.0 WNW IB9 Emergency offsite facility 19.3 12.0 WNW WA1 Intake area 0.2 0.1 NNE WA2 Discharge area 0.3 0.2 N WB1 Shoreline at Barge Rd . 0.6 0.4 ESE 1

Distance and direction from the central point between the two containment buildings 2

Common to both the REMP and ISFSI monitoring program 28

January 1 - December 31 , 2015 Docket Nos. 50-317 /50-318/72-8 Figure A-1 Map of Southern Maryland and Chesapeake Bay Showing Location of Calvert Cliffs Nuclear Power Plant 29

January l - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Figure A-2 Calvert Cliffs Nuclear Power Plant Sampling Locations 0-2 Miles NE 30

January 1 - December 31 , 2015 Docket Nos. 50-317 /50-318172-8 Figure A-3 Calvert Cliffs Nuclear Power Plant Sampling Locations 0-10 Miles 31

January 1 - December 31 , 2015 Docket Nos. 50-317/50-31 8/72- 8 Table A-2 Locations of Environmental Sampling Stations for the Independent Spent Fuel Storage Installation at Calvert Cliffs 1 1 Distance Direction Station Description (KM) (Sector)

Air Particulate A1 2

On Site Before Entrance to Camp Conoy 0.7 s SFA1 Meteorological Station 0.4 NW SFA2 CCNPP Visitor's Center 0.7 NNE SFA3 NNW of ISFSI 0.1 NNW SFA4 SSE of ISFSF 0.1 SSE Direct Radiation DR07 2

On Site Before Entrance to Camp Conoy 0.7 s DR30 Meteorological Station 0.4 NW SFDR01 SW of ISFSI 0.1 SW SFDR02 NNW of ISFSI 0.1 N SFDR03 North of ISFSI 0.1 N SFDR04 NE of ISFSI 0.1 NE SFDR05 East of ISFSI 0.1 E SFDR06 ESE of ISFSI 0.1 ESE SFDR07 CCNPP Visitor's Center 0.7 NNE SFDR08 NNW of ISFSI 0.1 NNW SFDR09 SSE of ISFSI 0.1 SSE SFDR10 NW of ISFSI 0.1 NW SFDR11 WNW ISFSI 0.1 WNW SFDR12 WSW of ISFSI 0.1 WSW SFDR13 South of ISFSI 0.1 s SFDR14 SE of ISFSI 0.1 SE SFDR15 ENE of ISFSI 0.1 ENE SFDR16 SSW of ISFSI 0.1 SW SFDR17 NNE of ISFSI 0.1 NNE SFDR18 West of ISFSI 0.1 w Vegetation SFB1 ISFSI Vegetation Met Station 0.4 NW SFB2 ISFSI Vegetation Visitors Center 0.7 NNE SFB3 ISFSI Vegetation NNW of ISFSI 0.1 NNW SFB4 ISFSI vegetation SSE of ISFSI 0.1 SSE SFB5 On Site Before Entrance to Camp Conoy 0.7 ESE Soil SFS1 ISFSI Soil Meteorological Station 0.4 NW SFS2 ISFSI Soil CCNPP Visitors Center 0.7 NNE SFS3 ISFSI Soil NNW of ISFSI 0.1 NNW SFS4 ISFSI Soil SSE of ISFSI 0.1 SSE SFS5 ISFSI Soil On Site Before entrance to Camp Conoy 0.7 ESE 1

Distance and di rection fro m the central point of the ISFS I 2

Co mmon to both the REMP and ISFSI monitoring program 32

January 1 - December 31 , 2015 Docket Nos . 50-317 /50-318172-8 Figure A-4 Independent Spent Fuel Storage Installation Sampling Locations

.. ' t'

.. 't ~ "'~ *

._1.I

I *

. ~.

r ----.-~- .

33

January l - December 31 , 2015 Docket Nos. 50-317/50-318/72-8 Figure A-5 Enlarged Map of the Independent Spent Fuel Storage Installation Sampling Locations 34

January 1 - December 31 , 2015 Docket Nos . 50-317/50-318/72-8 APPENDIXB Analysis Results for the REMP and the ISFSI Appendix B is a presentation of the analytical results for the CCNPP and the ISFSI radiological environmental monitoring programs.

35

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 TABLE OF CONTENTS - ANALYTICAL RESULTS B-1 Concentration of Tritium and Gamma Emitters in Bay Water ................................................ 37 B-2 Concentration of Gamma Emitters in the Flesh of Edible Fish ............................................... 38 B-3 Concentration of Gamma Emitters in Oyster Samples ............................................................ 39 B-4 Concentration of Gamma Emitters in Shoreline Sediment.. .................................................... 40 B-5 Concentration oflodine-131 in Filtered Air ........................................................................... .41 B-6 Concentration of Beta Emitters in Air Particulates ................................................................. .43 B-7 Concentration of Gamma Emitters in Air Particulates ........................................................... .47 B-8a Concentration of Gamma Emitters in Vegetation Samples .................................................... .48 B-8b Concentration of Gamma Emitters in Vegetation From Locations Around the ISFSI.. .......... 49 B-9 Concentration of Gamma Emitters in Soil Samples From Locations Around the ISFSI ........ 50 B-10 Typical MDA Ranges for Gamma Spectrometry .................................................................... 51 B-11 Typical LLDs for Gamma Spectrometry ................................................................................. 52 B-12 Direct Radiation ....................................................................................................................... 53 36

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table B-1 Concentration of Tritium and Gamma Emitters in Bay Water (Results in units of pCi/L +/- 2cr)

Sample Code Sample Date Gamma Emitters H-3 WA1 Intake Vicinity 1/2/2015

• 2/2/2015

• 3/4/2015

• 4/3/2015 * <155 5/3/2015

• 6/1/2015

• 7/3/2015 * <180 8/3/2015

• 9/2/2015

• 10/3/2015 * <179 11/2/2015

• 12/3/2015

• 12/31/2015 * <109 WA2 Discharge Vicinity 1/2/2015

• 2/2/2015

• 3/4/2015

• 4/3/2015 * <156 5/3/2015

• 6/1/2015

• 7/3/2015 * <179 8/3/2015

• 9/2/2015

• 10/3/2015 * <173 11/2/2015

• 12/3/2015

• 12/31/2015 * <110

• All Non-Natural Gamma Emitters <MDA 37

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table B-2 Concentration of Gamma Emitters in the Flesh of Edible Fish (Results in units of pCi/kg (wet) +/- 2cr)

Sample Code Sample Date Sample Type Gamma Emitters IA1 Discharge Area 8/18/2015 Bluefish

• IA2 Discharge Area 9/24/2015 Perch

• IA41 Patuxent River 8/18/2015 Bluefish

• 1 IA5 Patuxent River 9/24/2015 Perch

• 1 Control Location

• All Non-Natural Gamma Emitters <MDA 38

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8

/

Table B-3 Concentration of Gamma Emitters in Oyster Samples (Results in units of pCi/kg (wet) +/- 2cr)

Sample Code Sample Date Gamma Emitters IA3 Camp Conoy 3/24/2015

• 6/16/2015

• 8/18/2015

• 10/21/2015

• 1 IA6 Kenwood Beach 3/24/2015

• 6/16/2015

• 8/18/2015

• 10/21/2015

• 1 Control Location

• All Non-Natural Gamma Emitters <MDA 39 I

I

-- -- I

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 TableB-4 Concentration of Gamma Emitters in Shoreline Sediment (Results in units of pCi/kg (dry)+/- 2cr)

Sample Code Sample Date Gamma Emitters WB1 Shoreline at Barge Rd. 3/31/2015

• 10/27/2015 *

• All Non-Natural Gamma Emitters <MDA 40

January 1 - December 31, 2015 Docket Nos. 50-317/50-318172-8 Table B-5 Concentration of Iodine-131 in Filtered Air (Results in units of 10-3 pCi/m3 +/- 2cr)

A1 1 Start Date Stop Date A2 A3 A4 A5 Entrance to Camp Bay Breeze Route 765 EOF Camp Conoy Rd at Lusby Conoy Siren 12/29/2014 1/5/2015 * * * *

• 1/5/2015 1/12/2015 * * * *

• 1/12/2015 1/19/2015 * * * *

• 1/19/2015 1/26/2015 * * * *

• 1/26/2015 2/2/2015 * * * *

• 2/2/2015 2/9/2015 * * * *

• 2/9/2015 2/16/2015 * * * *

• 2/16/2015 2/23/2015 * * * *

• 2/23/2015 3/2/2015 * * * *

• 3/2/2015 3/9/2015 * * * *

• 3/9/2015 3/16/2015 * * * *

• 3/16/2015 3/23/2015 * * * *

• 3/23/2015 3/30/2015 * * * *

• 3/30/2015 4/6/2015 * * * *

• 4/6/2015 4/13/2015 * * * *

• 4/13/2015 4/20/2015 * * * *

• 4/20/2015 4/27/2015 * * * *

• 4/27/2015 5/4/2015 * * * *

• 5/4/2015 5/11/2015 * * * *

• 5/11/2015 5/18/2015 * * * *

• 5/18/2015 5/25/2015 * * * *

• 5/25/2015 6/1/2015 * * * *

• 6/1/2015 6/8/2015 * * * *

• 6/8/2015 6/15/2015 * * * *

• 6/15/2015 6/22/2015 * * * *

• 6/22/2015 6/29/2015 * * * *

• 6/29/2015 7/6/2015 * * * *

• 7/6/2015 7/13/2015 * * * *

• 7/13/2015 7/20/2015 * * * *

• 7/20/2015 7/27/2015 * * * *

• 7/27/2015 8/3/2015 * * * *

• 8/3/2015 8/10/2015 * * * *

• 8/10/2015 8/17/2015 * * * *

• 8/17/2015 8/24/2015 * * * *

• 8/24/2015 8/31/2015 * * * *

• 41

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table B-5 Concentration of lodine-131 in Filtered Air (Results in units of 10-3 pCi/m3 +/- 2cr)

Start Date Stop Date A1 A2. A3 A4 A5 1 Entrance to Camp Bay Breeze Route 765 EOF Camp Conoy Rd at Lusby Conoy Siren 8/31/2015 9/7/2015 * * * *

• 9/7/2015 9/14/2015 * * * *

• 9/14/2015 9/21/2015 * * * *

• 9/21/2015 9/28/2015 * * * *

• 9/28/2015 10/5/2015 * * * *

• 10/5/2015 10/12/2015 * * * *

• 10/12/2015 10/19/2015 * * * *

• 10/19/2015 10/26/2015 * * * *

• 10/26/2015 11/2/2015 * * * *

• 11/2/2015 11/9/2015 * * * *

• 11/9/2015 11/16/2015 * * * *

• 11/16/2015 11/23/2015 * * * *

• 11/23/2015 11/30/2015 * * * *

• 11/30/2015 12/7/2015 * * * *

• 12/7/2015 12/14/2015 * * * *

• 12/14/2015 12/21/2015 * * * *

• 12/21/2015 12/28/2015 * * * *

• 1 Control Location

• All Non-Natural Gamma Emitters <MDA 42

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 TableB-6 Concentration of Beta Emitters in Air Particulates (Results in units of 10-2 pCi/m3 +/- 2cr)

Start Date Stop Date A1 A2 1 A3 A4 A5 Entrance to Camp Bay Breeze Route 765 EOF Camp Conoy Rd at Lusby Conoy Siren 12/29/2014 1/5/2015 2.8 +/- 0.1 2.7 +/- 0.1 2.5 +/- 0.1 2.8 +/- 0.1 2.6 +/- 0.1 1/5/2015 1/12/2015 2.3 +/- 0.2 2.6 +/- 0.2 2.4 +/- 0.2 2.5 +/- 0.2 2.6 +/- 0.2 1/12/2015 1/19/2015 2.4 +/- 0.2 2.3 +/- 0.2 2.1 +/- 0.2 2.1 +/- 0.1 2.5 +/- 0.2 1/19/2015 1/26/2015 1.6 +/- 0.1 1.5 +/- 0.1 1.5 +/- 0.1 1.7 +/- 0.1 2.0 +/- 0.1 1/26/2015 2/2/2015 1.6 +/- 0.1 1.6 +/- 0.1 1.7 +/- 0.1 1.3 +/- 0.1 1.7+/-0.1 2/2/2015 2/9/2015 2.3 +/- 0.1 2.4 +/- 0.1 2.2 +/- 0.1 2.3 +/- 0.1 2.5 +/- 0.1 2/9/2015 2/16/2015 2.5 +/- 0.2 2.3 +/- 0.2 2.3 +/- 0.2 2.6 +/- 0.2 2.6 +/- 0.2 2/16/2015 2/23/2015 2.3 +/- 0.1 2.4 +/- 0.1 2.8 +/- 0.2 2.5 +/- 0.1 2.5 +/- 0.1 2/23/2015 3/2/2015 2.5 +/- 0.1 2.5 +/- 0.1 2.5 +/- 0.1 2.6 +/- 0.2 2.8 +/- 0.2 3/2/2015 3/9/2015 2.3 +/- 0.1 2.2 +/- 0.1 2.2 +/- 0.1 2.2 +/- 0.1 2.3 +/- 0.1 3/9/2015 3/16/2015 2.0 +/- 0.1 1.9 +/- 0.1 1.9 +/- 0.1 1.9 +/- 0.1 2.0 +/- 0.1 3/16/2015 3/23/2015 1.7 +/- 0.1 1.6 +/- 0.1 1.6 +/- 0.1 1.6 +/- 0.1 1.8 +/- 0.1 3/23/2015 3/30/2015 ~.9 +/- 0.1 1.8 +/- 0.1 2.1 +/- 0.1 1.9 +/- 0.1 1.9 +/- 0.1 3/30/2015 4/6/2015 1.4 +/- 0.1 1.6 +/- 0.1 1.6 +/- 0.1 1.6 +/- 0.1 1.6+/-0.1 4/6/2015 4/13/2015 1.6 +/- 0.1 1.4 +/- 0.1 1.4 +/- 0.1 1.2 +/- 0.1 1.4 +/- 0.1 4/13/2015 4/20/2015 1.5 +/- 0.1 1.5 +/- 0.1 1.4 +/- 0.1 1.5 +/- 0.1 1.5+/-0.1 4/20/2015 4/27/2015 1.6 +/- 0.1 1.5 +/- 0.1 1.6 +/- 0.1 1.5 +/- 0.1 1.6+/-0.1 4/27/2015 5/4/2015 1.1+/-0.1 1.1 +/- 0.1 1.1 +/- 0.1 1.0 +/- 0.1 1.0 +/- 0.1 5/4/2015 5/11/2015 2.1+/-0.1 2.1 +/- 0.1 2.2 +/- 0.1 2.4 +/- 0.2 2.4 +/- 0.2 5/11/2015 5/18/2015 1.6 +/- 0.1 1.5 +/- 0.1 1.6 +/- 0.1 1.8 +/- 0.1 1.8 +/- 0.1 5/18/2015 5/25/2015 2.0 +/- 0.1 1.9 +/- 0.1 2.1 +/- 0.1 2.0 +/- 0.1 2.1 +/- 0.1 5/25/2015 6/1/2015 1.6 +/- 0.1 1.6 +/- 0.1 1.8 +/- 0.1 1.5 +/- 0.1 1.7 +/- 0.1 6/1/2015 6/8/2015 0.7 +/- 0.1 0.7 +/- 0.1 0.8 +/- 0.1 0.8 +/- 0.1 0.9 +/- 0.1 6/8/2015 6/15/2015 2.2 +/- 0.1 2.2 +/- 0.1 2.2 +/- 0.1 2.3 +/- 0.1 2.2 +/- 0.1 6/15/2015 6/22/2015 1.6 +/- 0.1 1.7 +/- 0.1 1.7 +/- 0.1 1.7 +/- 0.1 1.8 +/- 0.1 6/22/2015 6/29/2015 1.3 +/- 0.1 1.4 +/- 0.1 1.4 +/- 0.1 1.5 +/- 0.1 1.6 +/- 0.1 6/29/2015 7/6/2015 1.7 +/- 0.1 1.7 +/- 0.1 1.6 +/- 0.1 1.7 +/- 0.1 1.7 +/- 0.1 7/6/2015 7/13/2015 1.8 +/- 0.1 1.7 +/- 0.1 1.6 +/- 0.1 1.7 +/- 0.1 1.9+/-0.1*

7/13/2015 7/20/2015 1.6 +/- 0.1 1.7 +/- 0.1 1.8 +/- 0.1 1.7 +/- 0.1 1.8+/-0.1 7/20/2015 7/27/2015 1.9 +/- 0.1 1.9+/-0.1 1.9 +/- 0.1 2.0 +/- 0.1 2.1 +/- 0.1 7/27/2015 8/3/2015 . 2.2 +/- 0.1 2.0 +/- 0.1 2.3 +/- 0.1 2.2 +/- 0.1 2.4 +/- 0.1 8/3/2015 8/10/2015 1.9 +/- 0.1 1.9 +/- 0.1 1.9 +/- 0.1 1.9 +/- 0.1 2.4 +/- 0.2 8/10/2015 8/17/2015 1.8 +/- 0.1 1.9 +/- 0.1 1.9 +/- 0.1 1.8 +/- 0.1 2.0 +/- 0.1 8/17/2015 8/24/2015 2.1 +/- 0.1 2.1 +/- 0.1 2.2 +/- 0.1 2.1+/-0.1 2.5 +/- 0.1 8/24/2015 8/31/2015 2.4 +/- 0.1 2.5 +/- 0.1 2.3 +/- 0.1 2.5 +/- 0.1 2.9 +/- 0.1 43

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 TableB-6 Concentration of Beta Emitters in Air Particulates (Results in units of 10-2 pCi/m3 +/- 2cr) 1 Start Date Stop Date A1 A2 A3 A4 A5 Entrance to Camp Bay Breeze Route 765 EOF Camp Conoy Rd at Lusby Conoy Siren 8/31/2015 9/7/2015 3.2 +/- 0.2 3.3 +/- 0.2 3.4 +/- 0.2 3.3 +/- 0.2 3.6 +/- 0.2 9/7/2015 9/14/2015 1.6 +/- 0.1 1.7 +/- 0.1 1.8 +/- 0.1 1.7 +/- 0.1 1.8 +/- 0.1 9/14/2015 9/21/2015 2.9 +/- 0.2 2.8 +/- 0.2 2.8 +/- 0.1 2.9 +/- 0.2 3.1 +/- 0.2 9/21/2015 9/28/2015 1.9 +/- 0.1 1.8 +/- 0.1 2.0 +/- 0.1 1.8 +/- 0.1 1.9 +/- 0.1 9/28/2015 10/5/2015 0.7 +/- 0.1 0.8 +/- 0.1 0.8 +/- 0.1 0.8 +/- 0.1 0.8 +/- 0.1 10/5/2015 10/12/2015 2.0 +/- 0.1 2.0 +/- 0.1 2.3 +/- 0.2 2.1+/-0.1 2.3 +/- 0.2 10/12/2015 10/19/2015 1.9 +/- 0.1 1.9 +/- 0.1 1.7 +/- 0.1 2.0 +/- 0.1 2.2 +/- 0.1 10/19/2015 10/26/2015 2.3 +/- 0.1 2.2 +/- 0.1 2.3 +/- 0.1 2.3 +/- 0.1 2.6 +/- 0.1 10/26/2015 11/2/2015 1.8 +/- 0.1 1.9 +/- 0.1 1.8 +/- 0.1 1.7 +/- 0.1 1.9 +/- 0.1 11/2/2015 11/9/2015 2.2 +/- 0.1 2.0 +/- 0.1 2.1 +/- 0.1 2.1 +/-0.1 2.0 +/- 0.1 11/9/2015 11/16/2015 2.1 +/- 0.1 1.9 +/- 0.1 2.0 +/- 0.2 2.0 +/- 0.1 2.1 +/- 0.2 11/16/2015 11/23/2015 2.1 +/- 0.1 2.2 +/- 0.1 2.2 +/- 0.1 2.0 +/- 0.1 2.1 +/- 0.1 11/23/2015 11/30/2015 2.0 +/- 0.1 2.0 +/- 0.1 2.1 +/- 0.1 2.0 +/- 0.1 2.2 +/- 0.1 11/30/2015 12/7/2015 3.9 +/- 0.2 3.2 +/- 0.2 3.2 +/- 0.2 3.5 +/- 0.2 3.4 +/- 0.2 12/7/2015 12/14/2015 4.7 +/- 0.2 4.3 +/- 0.2 4.4 +/- 0.2 4.5 +/- 0.2 4.7 +/- 0.2 12/14/2015 12/21/2015 1.8 +/- 0.1 1.8 +/- 0.1 1.9 +/- 0.1 1.8 +/- 0.1 2.0 +/- 0.1 12/21/2015 12/28/2015 1.4 +/- 0.1 1.2 +/- 0.1 1.3 +/- 0.1 1.2 +/- 0.1 1.3 +/- 0.1 1

Control Location 44

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table B Continued Concentration of Beta Emitters in Air Particulates (Results in units of 10-2 pCi/m3 +/- 2cr)

Start Date Stop Date SFA1 SFA2 1 SFA3 SFA4 MET Station Visitors NNWof ISFSI SSE of ISFSI Center 12/29/2014 1/5/2015 2.6 +/- 0.1 2.8 +/- 0.1 2.5 +/- 0.1 2.6 +/- 0.1 1/5/2015 1/12/2015 2.6 +/- 0.2 2.5 +/- 0.2 2.2 +/- 0.1 2.3 +/- 0.1 1/12/2015 1/19/2015 2.7 +/- 0.4 2.6 +/- 0.2 2.1 +/- 0.2 2.3 +/- 0.2 1/19/2015 1/26/2015 1.1+/-0.1 1.8 +/- 0.1 1.5 +/- 0.1 1.6 +/~ 0.1 1/26/2015 2/2/2015 1.7 +/- 0.1 1.6 +/- 0.1 1.5 +/- 0.1 1.5 +/- 0.1 2/2/2015 2/9/2015 2.2 +/- 0.1 2.4 +/- 0.1 2.0 +/- 0.1 2.2 +/- 0.1 2/9/2015 2/16/2015 2.6 +/- 0.2 2.8 +/- 0.2 2.3 +/- 0.2 2.6 +/- 0.2 2/16/2015 2/23/2015 2.7 +/- 0.2 2.7 +/- 0.2 2.6 +/- 0.2 2.6 +/- 0.1 2/23/2015 3/2/2015 2.7 +/- 0.2 2.6 +/- 0.1 2.7 +/- 0.2 2.5 +/- 0.1 3/2/2015 3/9/2015 2.3 +/- 0.1 2.2 +/- 0.1 2.2 +/- 0.1 2.0 +/- 0:1 3/9/2015 3/16/2015 1.9 +/- 0.1 1.9 +/- 0.1 1.7 +/- 0.1 1.7 +/- 0.1 3/16/2015 3/23/2015 1.7 +/- 0.1 1.8 +/- 0.1 1.7 +/- 0.1 1.6 +/- 0.1 3/23/2015 3/30/2015 1.8 +/- 0.1 1.9+/-0.1 1.8 +/- 0.1 1.8 +/- 0.1 3/30/2015 4/6/2015 1.5 +/- 0.1 1.6 +/- 0.1 1.5 +/- 0.1 1.5 +/- 0.1 4/6/2015 4/13/2015 1.4 +/- 0.1 1.2 +/- 0.1 1.3 +/- 0.1 1.3 +/- 0.1 4/13/2015 4/20/2015 1.4 +/- 0.1 1.4 +/- 0.1 1.4 +/- 0.1 1.4 +/- 0.1 4/20/2015 4/27/2015 1.5 +/- 0.1 1.5 +/- 0.1 1.7 +/- 0.1 1.5 +/- 0.1 4/27/2015 5/4/2015 0.9 +/- 0.1 1.1+/-0.1 1.0 +/- 0.1 1.0 +/- 0.1 5/4/2015 5/11/2015 2.0 +/- 0.1 2.3 +/- 0.2 2.2 +/- 0.1 2.1 +/- 0.1 5/11/2015 5/18/2015 1.6 +/~ 0.1 1.8 +/- 0.1 1.7 +/- 0.1 1.8 +/- 0.1 5/18/2015 5/25/2015 1.8 +/- 0.1 1.9 +/- 0.1 2.0 +/- 0.1 2.0 +/- 0.1 5/25/2015 6/1/2015 1.4 +/- 0.1 1.7 +/- 0.1 1.6 +/- 0.1 1.7+/-0.1 6/1/2015 6/8/2015 0.7 +/- 0.1 0.7 +/- 0.1 0.8 +/- 0.1 0.8 +/- 0.1 6/8/2015 6/15/2015 2.0 +/- 0.1 2.2 +/- 0.1 2.2 +/- 0.1 2.1 +/- 0.1 6/15/2015 6/22/2015 1.4 +/- 0.1 1.7 +/- 0.1 1.7 +/- 0.1 1.6 +/- 0.1 6/22/2015 6/29/2015 1.3 +/- 0.1 1.5 +/- 0.1 1.4 +/- 0.1 1.5 +/- 0.1 6/29/2015 7/6/2015 1.6 +/- 0.1 1.7 +/- 0.1 1.9 +/- 0.1 1.8 +/- 0.1 7/6/2015 7/13/2015 1.7 +/- 0.1 2.0 +/- 0.1 2.0 +/- 0.1 1.8 +/- 0.1 7/13/2015 7/20/2015 1.6 +/- 0.1 1.7 +/- 0.1 1.6 +/- 0.1 1.8 +/- 0.1 7/20/2015 7/27/2015 1.9 +/- 0.1 2.1+/-0.1 2.0 +/- 0.1 1.9 +/- 0.1 7/27/2015 8/3/2015 2.1 +/- 0.1 2.2 +/- 0.1 2.3 +/- 0.1 2.2 +/- 0.1 8/3/2015 8/10/2015 1.8 +/- 0.1 1.9+/-0.1 2.0 +/- 0.1 1.8 +/- 0.1 8/10/2015 8/17/2015 1.8 +/- 0.1 2.0 +/- 0.1 2.1+/-0.1 2.0 +/- 0.1 8/17/2015 8/24/2015 2.1 +/- 0.1 2.2 +/- 0.1 2.3 +/- 0.1 2.2 +/- 0.1 8/24/2015 8/31/2015 2.6 +/- 0.1 2.7 +/- 0.1 2.6 +/- 0.1 2.6 +/- 0.1 45

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table B Continued Concentration of Beta Emitters in Air Particulates (Results in units of 10-2 pCi/m3 +/- 2cr)

Stop Date SFA1 1 Start Date SFA2 SFA3 SFA4 MET Station Visitors NNW oflSFSI SSE of ISFSI Center 8/31/2015 9/7/2015 3.4 +/- 0.2 3.4 +/- 0.2 3.6 +/- 0.2 3.2 +/- 0.2 9/7/2015 9/14/2015 1.6 +/- 0.1 1.7 +/- 0.1 1.8 +/- 0.1 1.7+/-0.1 9/14/2015 9/21/2015 2.8 +/- 0.2 3.0 +/- 0.2 3.2 +/- 0.2 2.9 +/- 0.2 9/21/2015 9/28/2015 1.7+/-0.1 1.7 +/- 0.1 1.8 +/- 0.1 1.7 +/- 0.1 9/28/2015 10/5/2015 1.3 +/- 0.1 0.9 +/- 0.1 0.9 +/- 0.1 0.8 +/- 0.1 10/5/2015 10/12/2015 2.2 +/- 0.2 2.3 +/- 0.2 2.4 +/- 0.2 1.9 +/- 0.1 10/12/2015 10/19/2015 1.8 +/- 0.1 2.0 +/- 0.1 2.0 +/- 0.1 1.8 +/- 0.1 10/19/2015 10/26/2015 2.2 +/- 0.1 2.3 +/- 0.1 2.4 +/- 0.1 2.3 +/- 0.1 10/26/2015 11/2/2015 1.6 +/- 0.1 1.7+/-0.1 1.7 +/- 0.1 1.7-+/- 0.1 11/2/2015 11/9/2015 2.5 +/- 0.1 2.1 +/-0.1 1.9 +/- 0.1 2.1 +/- 0.1 11/9/2015 11/16/2015 2.0 +/- 0.1 1.9 +/- 0.1 2.0 +/- 0.1

• 1.9 +/- 0.1 11/16/2015 11/23/2015 1.9 +/- 0.1 1.8 +/- 0.1 1.9 +/- 0.1 2.0 +/- 0.1 11/23/2015 11/30/2015 1.9 +/- 0.1 1.9 +/- 0.1 1.9 +/- 0.1 1.5 +/- 0.1 11/30/2015 12/7/2015 3.6 +/- 0.2 3.2 +/- 0.2 3.6 +/- 0.2 3.3 +/- 0.2 12/7/2015 12/14/2015 4.7 +/- 0.2 4.3 +/- 0.2 4.3 +/- 0.2 4.6 +/- 0.2 12/14/2015 12/21/2015 2.3 +/- 0.1 2.0 +/- 0.1 2.1 +/- 0.1 2.1 +/-0.1 12/21/2015 12/28/2015 . 1.4 +/- 0.1 1.3 +/- 0.1 1.4 +/- 0.1 1.2 +/- 0.1 1

Control Location 46

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table B-7 Concentration of Gamma Emitters in Air Particulates (Results in units of 10*3 pCi/m3 +/- 2cr)

Sample Date A1 A2 1 A3 A4 A5 Entrance to Camp Conoy Bay Breeze Route 765 at EOF Camp Conoy Siren Rd Lusby 2/2/2015 * * * *

• 3/2/2015 * * * *

• 3/30/2015 * * * *

• 4/27/2015 * * * *

• 6/1/2015 * * * *

• 6/29/2015 * * * *

• 8/3/2015 * * * *

• 8/31/2015 * * * *

• 9/28/2015 * * * *

• 11/2/2015 * * * *

• 11/30/2015 * * * *

• 12/28/2015 * * * *

• 1 Sample Date SFA1 SFA2 SFA3 SFA4 MET Station Visitors Center NNW oflSFSI SSE of ISFSI 2/2/2015 * * *

• 3/2/2015 * * *

• 3/30/2015 * * *

• 4/27/2015 * * *

• 6/1/2015 * * *

• 6/29/2015 * * *

• 8/3/2015 * * *

• 8/31/2015 * * *

• 9/28/2015 * * *

• 11/2/2015 * * *

• 11/30/2015 * * *

• 12/28/2015 * * *

• 1 Control Location

• All Non-Natural Gamma Emitters <MDA 47

I I

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table B-8a Concentration of Gamma Emitters in Vegetation Samples (Results in units of pCi/kg (wet) +/- 2cr)

Sample Code Sample Date Sample Type Gamma Emitters IB1 Bay Breeze Rd 6/15/2015 Cabbage

• 7/27/2015 Cabbage

• 8/17/2015 Broccoli

• IB2 Bay Breeze Rd 6/15/2015 Broccoli

• 7/27/2015 Broccoli

• 8/17/2015 Brussels sprouts

• IB3 Bay Breeze Rd 6/15/2015 Brussels sprouts

• 7/27/2015 Brussels sprouts

• 8/17/2015 Eggplant Leaves

• IB4 Camp Conoy Entrance 6/15/2015 Cabbage

• 7/27/2015 Cabbage

• 8/17/2015 Broccoli

• IB5 Camp Conoy Entrance 6/15/2015 Broccoli

• 7/27/2015 Broccoli

• 8/17/2015 Brussels sprouts

• IB6 Camp Conoy Entrance 6/15/2015 Brussels sprouts

• 7/27/2015 Brussels sprouts

• 8/17/2015 Eggplant Leaves

• IB?1 EOF 6/15/2015 Cabbage

• 7/27/2015 Cabbage

• 8/17/2015 Broccoli

• 1 IB8 EOF 6/15/2015 Broccoli

• 7/27/2015 Broccoli

• 8/17/2015 Brussels sprouts

• 1 IB9 EOF 6/15/2015 Brussels sprouts

• 7/27/2015 Brussels sprouts

• 8/17/2015 Eggplant Leaves

• 1 Control Location

• All Non-Natural Gamma Emitters <MDA 48

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table B-8b Concentration of Gamma Emitters in Vegetation From Locations Around the ISFSI (Results in units of pCi/kg (wet) +/- 2o-)

Sample Code Sample Date Cs-137 Gamma Emitters SFB1 MET Station 3/16/2015

• 6/24/2015

• 9/28/2015

• 10/2i/2015

• 2 SFB2 Visitor's Center 3/16/2015

• 6/24/2015

• 9/28/2015

• 10/27/2015

• SFB3 NNW oflSFSI 3/16/2015

• 6/24/2015

• 9/28/2015

• 10/27/2015

• SFB4 SSE of ISFSI 3/16/2015

• 6/24/2015

• 9/28/2015

• 10/27/2015

• SFB5 On Site Before Entrance to Camp Conoy 3/16/2015 51 +/- 30

• 1 6/24/2015

• 9/28/2015

• 10/27/2015 192 +/- 45

• 1 This isotope <MDA 2

Control Location

• All Non-Natural Gamma Emitters <MDA 49

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table B-9 Concentration of Gamma Emitters in Soil Samples From Locations Around the ISFSI (Results in units of pCi/kg (dry)+/- 2cr Sample Code Sample Date Cs-137 Gamma Emitters SFS1 MET station 3/16/2015

• 6/24/2015

• 9/28/2015

• 10/27/2015

• 2 SFS2 Visitors Center 3/16/2015 63 +/- 29

• 6/24/2015 71 +/- 35

• 9/28/2015 61 +/- 31

• 10/27/2015 49 +/- 29

• SFS3 NNWof ISFSI 3/16/2015 148 +/- 64

• 6/24/2015 58 +/- 36

• 1 9/28/2015

• 10/27/2015

• SFS4 SSE of ISFSI 3/16/2015

• 6/24/2015

• 9/28/2015

• 10/27/2015

• SFS5 Entrance to Camp Conoy 3/16/2015 128 +/- 27

• 6/24/2015 171 +/-51

• 9/28/2015 101 +/- 27

• 10/27/2015 144 +/- 44

• 1 This isotope <MDA 2

Control Location

• All Non-Natural Gamma Emitters <MDA 50

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table B-10 Typical MDA Ranges for Gamma Spectrometry Bay Water, Air Surface Shoreline Selected Fish Groundwater Oysters Soil (pCi/kg) Vegetation Particulates Water, Milk (pCi/L) Sediment Nuclides (pCi/Kg) Wet (pCi/L) (pCi/kg) Wet Dry (pCi/L) Wet (10-2 pCi/m 3 ) Drinking (pCi/kg) Dry Water (pCi/L)

Na-22 0- .6 2.3 - 4.7 0 - 62.3 2.3- 5.1 3.9- 9.6 3.4 - 32.1 38.7-71.7 35.5 - 82.6 12.1 - 44.8 K-40 0- 5.8 24.1 - 53.5 0 - 487.3 23.8 - 57.3 22.2 - 77.4 31.8- 222 274 - 580 241 - 739 54.8-422 Cr-51 0- 5.1 20.8 - 37.2 0 - 1576 20.7 - 37.6 27 - 55.6 0-479 195 - 733 289 - 643 53 - 276 Mn-54 0 - .4 2.1 - 4.2 0 - 58.1 2.1 - 4.6 2.9 - 7.2 5.4- 44 32.8- 58.1 30.1 - 73.9 9.2 - 35.4 Co-58 0 - .5 2.3 - 4.3 0 - 89.1 2.2 - 4.7 3 - 6.9 1.6- 59.7 32.5 - 62.1 31 - 72.1 8.7 - 35.4 Fe-59 0 - 1.4 5.2 - 9.7 0-287 5 - 10 8.2-17.2 17.3 - 5439 51.8-188 74.5 - 164 22.9 - 78.1 Co-60 0- .5 2.3 - 4.5 0 - 60.2 2.1 - 5 3.2 - 8.3 8.2 - 42.4 32.8 - 63.2 33.3 - 73.3 11.1 - 40.9 Zn-65 0 - 1.1 4.6- 9.1 27.2 - 61.7 4.4 - 11.4 8.2 - 19 17.5 - 97.3 90.8 - 153 83.9 - 197 24.2 - 87 Nb-95 0- .7 2.7 - 4.8 0 - 180 2.4 - 5.3 3.1 - 7.1 0 - 51.3 30.9 - 102 43.4 - 96.6 9.3 - 37.4 Zr-95 0 - .9 4.1 - 7.5 0 - 163 4.1 - 7.8 5.2 - 11.8 0 - 91.3 55.4-119 57.6 - 131 15.6 - 60.6 Ru-106 0- 3.5 18.4 - 36.8 0-450 19.4- 39.2 23.6 - 59.2 0 - 271 267 - 483 265 - 578 75 - 312 Ag-110m 0-0 2-4 0 - 63.8 2.1 - 4.4 2.6 - 6.7 .4 - 25.6 31.9-48.7 34.8 - 78.8 7.8 - 35.1 1

1-131 0-0.4 0.5 - 0.9 14.7-113 4.2 - 8.5 .3 - .9 0-463 52.3 - 1270 55 -483 10.1-43.5 Cs-134 0 - .4 2.1 - 3.9 10.1 - 64.4 2-4.7 2.3 - 6.8 3.2 - 43.5 30.3 - 56.7 42.4- 73.8 9.9 - 34.2 Cs-137 0 - .4 2.2 - 4.4 1.1-61.8 2.2 - 4.8 2.7 - 7.4 8.2- 61.1 34.6 - 53.8 36.6 - 73.7 10.9 - 37.1 Ba-140 0- 2.6 5.3 - 10.4 0 - 2304 4.7 - 8.9 1.6 - 9.4 0 - 151.4 56.1 - 440 63.1 - 216 11.1 - 53.7 La-140 0- 2.6 5.1 - 10.3 0 - 2304 4.7 - 8.9 1.6 - 9.4 0 - 151 56.1-440 63.1 - 216 11.1 - 53.7 Ce-144 0 - 1.2 11.2 - 20.9 0-226 12.1 - 23.1 14.3 - 31.9 0 - 166 130 - 217 136-301 28.4 - 159 1 3 2 This MDA range for I-131 on a charcoal cartridge is typically 4.00 x 10* to 5.70 x 10*

51

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table B-11 Typical LLDs for Gamma Spectrometry Bay Water, Air Soil pCi/kg Vegetation Selected Surface Water, Fish pCi/kg Ground water Oysters pCi/kg Precipitation Particulates pCi/kg (wet)

Nuclides Drinking Water (wet) pCi/L (wet) pCi/L (dry) 10*3 pCi/m 3 pCi/L Na-22 2.9 2.9 22 2.9 22 2.9 24 35 Cr-51 12 17 88 17 88 17 110 162 Mn-54 2.1 2.4 17 2.4 17 2.4 18 27 Co-58 2 2.4 16 2.4 16 2.4 17 25 Fe-59 4.6 5.2 37 5.2 37 5.2 38 60 Co-60 2.7 2.8 22 2.8 22 2.8 21 33 Zn-65 2.8 5.6 23 5.6 23 5.6 54 66 Nb-95 1.9 2.2 15 2.2 15 2.2 18 25 Zr-95 3.3 3.8 27 3.8 27 3.8 29 44 Ru-106 17 20 135 20 135 20 146 223 Ag-110m 1.8 2.1 14 2.1 14 2.1 16 25 Te-129m 20 26 149 26 149 26 180 265 1-131

• 1.5 2 11 2 11 2 14 20 Cs-134 1.9 2.2 15 2.2 15 2.2 20 24 Cs-137 1.8 2.3 15 2.3 15 2.3 17 27 Ba-140 6.1 7.3 48 7.3 48 7.3 54 80 La-140 3.4 4.1 26 4.1 26 4.1 25 41 Ce-144 5.5 12 43 12 43 12 75 101 3 3

• The LLD for I-131 measured on a charcoal cartridge is 2.0 x10* pCi/m 52

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table B-12 Direct Radiation (Results in Units of mR/90 days +/- 2cr)

Site Code Location First Quarter Second Quarter Third Quarter Fourth Quarter DR01 On Site, along Cliffs 13.36 +/- 0.62 12.83 +/- 1.97 13.48 +/- 1.95 13.64 +/- 0.53 DR02 Route 765, Auto Dump 11.89 +/- 0.75 11.28 +/- 0.81 11.14 +/- 1.03 11.30 +/- 1.06 DR03 Route 765, Giovanni's 11.35 +/- 0.81 11.18 +/- 1.29 10.84 +/- 0.61 11.00 +/- 0.88 Tavern DR04 Route 765, White Sands 13.00 +/- 1.92 12.34 +/- 0.54 12.62 +/- 0.91 12.65 +1-* 0.31 Drive DR05 Route 765, John's Creek 12.30 +/- 0.87 12.58 +/- 1.21 12.61 +/- 0.82 12.82 +/- 0.82 DR06 Route 765 at Lusby 10.87 +/- 1.24 10.77 +/- 1.29 10.69 +/- 1.15 10.52 +/- 1.16 DR07 Entrance to Camp Conoy 10.45 +/- 0.69 10.50 +/- 1.01 10.51 +/- 0.79 10.71 +/- 0.90 DR08 Camp Conoy Rd at 15.15 +/- 0.80 15.39 +/- 1.48 15.10 +/- 2.01 15.15 +/- 1. 78 Emergency Siren DR09 Bay Breeze Rd 11.09+/- 1.37 11.05 +/- 1.17 11.08 +/- 1.19 11.23 +/- 0.66 DR10 Calvert Beach Rd and 11.22 +/- 1.14 10.79 +/- 1.12 10.63 +/- 0.39 11.16 +/- 0.64 Decatur Street DR11 Dirt road off Mackall & 11.48 +/- 0.61 11.14+/-0.70 11.59 +/- 1.80 11.56 +/- 0.70 Parren Rd DR12 Mackall & Bowen Rds 11.22 +/- 0.45 10.96 +/- 0.83 11.30 +/- 0.83 11.18 +/- 0.51 DR13 Mackall Rd, near Wallville 12.27 +/- 0.67 12.99 +/- 1.39 12.44 +/- 1.34 12.93 +/- 1.28 DR14 Rodney Point 13.94 +/- 1.98 13.67 +/- 0.99 13.96 +/- 1.42 12.61 +/- 0.75 DR15 Mill Bridge & Turner Rds 12.35 +/- 0.64 11.61+/-1.09 12.20 +/- 1.06 12.22 +/- 1.37 53

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table B-12 Direct Radiation (Results in Units of mR/90 days +/- 2cr)

Site Code Location First Quarter Second Quarter Third Quarter Fourth Quarter DR16 Across from Appeal 12.54 +/- 0.62 10.63 +/- 0.93 11.14 +/- 1.29 11.00 +/- 0.97 School DR17 Cove Point & Little Cove 13.66 +/- 0.80 14.29 +/- 1.31 12.94 +/- 0.90 14.14 +/- 1. 77 Point Rds DR18 Cove Point 10.32 +/- 0.83 9.63 +/- 0.52 9.78 +/- 0.89 9.90 +/- 1.43 DR19 Long Beach 11.20 +/- 0.81 10.92 +/- 0.83 10.75 +/- 1.20 11.02 +/- 0.97 DR20 On site, near shore 13.90 +/- 0.90 13.47 +/- 1.51 13.88 +/- 0.80 13.94 +/- 0.98 1 12.23 +/- 1.47 12.51 +/- 0.51 12.81 +/- 1.34 12.62 +/- 0.40 DR21 EOF DR2i Solomons Island 11.83 +/- 1.36 11.24 +/- 0.98 11.48 +/- 0.49 12.08 +/- 0.86 DR23 1

Taylors Island 15:68 +/- 1.37 16.18 +/- 0.59 16.30 +/- 1.52 16.55 +/- 1.38 DR30 MET Station 11.97 +/- 0.79 11.92 +/- 0.77 12.25 +/- 0.66 12.36 +/- 0.85 SFDR01 SW of ISFSI 16.97 +/- 1.55 17.97+/- 1.56 17.17 +/- 1.22 17.36 +/- 1.69 SFDR02 NNW of ISFSI 19.47 +/- 1.35 18.87 +/- 1.75 19.56 +/- 1.99 19.72 +/- 1.85 SFDR03 North of ISFSI 38.05 +/- 4.66 38.67 +/- 7.94 38.28 +/- 8.35 45.87 +/- 7.44 SFDR04 NE of ISFSI 35.66 +/- 6.55 36.21 +/- 3.75 31.96 +/- 4.06 35.14 +/- 8.82 SFDR05 East of ISFSI 20.64 +/- 3.14 24.64 +/- 3.44 22.91 +/- 2.67 22.08 +/- 3.03 SFDR06 ESE of ISFSI 18.71 +/- 0.79 19.28 +/- 2.55 18.86 +/- 0.60 20.52 +/- 1.38 54

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table B-12 Direct Radiation (Results in Units of mR/90 days +/- 2cr)

Site Code Location First Quarter Second Quarter Third Quarter Fourth Quarter SFDROt Visitor's Center 13.05 +/- 0.37 13.44 +/- 1.90 12.34 +/- 0.63 12.70 +/- 0.75 SFDR08 NNW of ISFSI 28.30 +/- 4.90 26. 78 +/- 3.23 27.57 +/- 5.48 28.83 +/- 5.85 SFDR09 SSE of ISFSI 16.60 +/- 1.73 17.41 +/- 1.70 17.30 +/- 2.07 22.93 +/- 1.91 SFDR10 NW of ISFSI 34.62 +/- 3.08 25.02 +/- 3.95 33.47 +/- 4.17 34.26 +/- 6.80 SFDR11 WNWISFSI 26.47 +/- 3.26 23.78 +/- 1.48 30.42 +/- 3.02 25.05 +/- 3.49 SFDR12 WSWoflSFSI 45.00 +/- 12.49 42.40 +/- 6.81 39. 76 +/- 6.08 42.51 +/- 1.59 SFDR13 South of ISFSI 27 .24 +/- 6.46 26.26 +/- 6.93 22.24 +/- 2.61 31.06 +/- 6.93 SFDR14 SE of ISFSI 46.36 +/- 11. 72 28.59 +/- 3.69 36.89 +/- 18.32 34.08 +/- 3.60 SFDR15 ENE of ISFSI 24.74 +/- 5.04 23.22 +/- 5.10 22.81 +/- 5.23 27.43 +/- 8.33 SFDR16 SSW of ISFSI 41.76 +/- 5.01 37.51 +/- 5.76 42.67 +/- 5.35 39.81 +/- 6.89 SFDR17 NNE of ISFSI 45.82 +/- 9.38 42.90 +/- 5.35 42.57 +/- 5.78 43.89 +/- 9.23 SFDR18 West of ISFSI 44.85 +/- 5.63 41.09 +/- 6.51 46.29 +/- 5.43 43.81 +/- 4.07 1

ControlLocation 55

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 APPENDIXC Quality Assurance Program Appendix C is a summary of Exelon Industrial Services (EIS) Laboratory's quality assurance program. It consists of Table C-1 which is a compilation of the results of the EIS Laboratory's participation in an interlaboratory comparison program with Environmental Resource Associates (ERA) located in Arvada, Colorado and Analytics, Inc. located in Atlanta, Georgia. It also includes Table C-2, which is a compilation of the results of the EIS laboratory's participation in a split sample program with Teledyne Brown Engineering located in Knoxville, Tennessee, and Table C-3, which is a list of typical MD As achieved by Teledyne Brown for Gamma Spectroscopy.

All the EIS Laboratory's results contained in Table C-1 generally agree with the intercomparison laboratory's results within the range of +/-2 cr of each other. Results for ERA RAD 101 gamma emitters in water initially failed acceptable ranges. Upon investigation it was confirmed that an incorrect reference date had been used. When the correct reference date was used and data was reprocessed all results reported within acceptable ranges. This event has been entered into the Laboratory's Corrective Action Program and steps have been taken to prevent future occurrences. Results for Zinc and Cesium-134 in ERA RAD 103 were just outside the acceptable range but did pass the NRC Resolution Test Criteria. All other sets of intercomparison results in the table are also in full agreement when they were further evaluated using the NRC Resolution Test Criteria1. The uncertainties for the EIS Laboratory's results and Analytics' results are +/-2cr while the ERA laboratory's uncertainty is based on USEPA gut"del"mes 2 .

All the results contained in Table C-2 agree within the range of +/-2 cr of each other with their respective EIS Laboratory original, replicate and/or Teledyne Brown Engineering's split laboratory samples, except for the comparisons of two samples involving Cs-137 results: bottom sediment samples from WBS2 collected on 06/15/2015 and WBS4 also collected 06/15/2015. In the case ofWBS2 low levels of Cs-137 were observed in two of the results of the comparison set within +/-2 cr of each other and not observed in the split sample. The MDA of the split lab was within +/-2 cr of the original and replicate results. In the case ofWBS4 the original and replicate results agree within +/-2 cr of each other and the high uncertainty of the split lab result puts this value within range of the original and replicate results. These minor discrepancies, occurring very close to or below the analyses MD A's, are most probably due to counting statistical fluctuations and/or the non-homogeneous nature of the sample-splitting process. Other samples whose nature generally precludes sample splitting are marked"**" in the Split Analysis column.

1 NRC Inspection Manual, Inspection Procedure 84750, March 15, 1994 2

National Standards for Water Proficiency Testing Studies Criteria Document, December 1998 56

. January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 TABLE OF CONTENTS - ANALYTICAL RESULTS Table Title Page C-1 Results of Participation in Cross Check Programs .................................................................. 58 C-2 Results of Quality Assurance Program .................................................................................... 61 C-3 Teledyne Brown Engineering's Typical MDAs for Gamma Spectrometry ............................ 72 57

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table C-1 Results of Participation in Cross Check Programs Reported Sample Type and Cross Check Lab Sample Date Isotope Observed Laboratory's Units Results Results 01/05/15 Air Iodine - pCi 1-131 22.7 +/- 6.6 22.3 01/05/15 Water - pCi/L Cs-137 125 +/- 6.0 124 Ba-133 60.0 +/- 4.0 67.6 Cs-134 45.3 +/- 3.0 51.3 Zn-65 109 +/- 10.0 98.7 Co-60 64.1 +/- 4.0 62.4 03/19/15 Air Iodine - pCi . 1-131 66.0 +/- 5.0 77.8 +/- 2.6 03/19/15 Milk-pCi/L Cr-51 600 +/- 83.0 555 +/- 7.0 Ce-141 239 +/-17.0 211 +/- 7.0 Cs-137 266 +/- 19.0 253 +/- 8.4 1-131 102 +/- 14.0 97.5 +/- 3.3 Cs-134 184 +/- 12.0 191 +/- 6.4 Zn-65 543 +/- 43.0 453 +/- 15.1 Co-60 536 +/- 20.0 498 +/- 16.6 Co-58 286 +/- 19.0 272 +/- 9.1 Fe-59 338 +/- 26.0 295 +/- 9.9 Mn-54 276 +/- 20.0 240 +/- 8.0 03/19/15 Water - pCi/L Gross Beta 239 +/- 6.4 280 +/- 9.34 1

04/06/15 Water - pCi/L Co-60 86.3 +/- 5.0 84.5 1-131 24.2 +/- 5.0 23.8

.Ba-133 78.4 +/- 6.0 82.5 Cs-137 184. 7 +/- 5.0 189.0 Cs-134 66.0 +/- 5.0 75.7 Zn-65 216 +/- 5.0 203 58

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table C-1 Results of Participation in Cross Check Programs Reported Sample Type and Cross Check Lab Sample Date Isotope Observed Laboratory's Units Results Results 06/11/15 Air Filter - pCi Cr-51 238 +/- 27.0 231 +/- 7.7 Cs-134 121 +/- 3.0 136 +/- 4.6 Cs-137 109 +/- 5.0 105 +/- 3.5 Fe-59 145 +/- 7.0 127 +/- 4.2 Co-58 59.0 +/-4.0 57.2 +/- 1.9 Co-60 173 +/- 5.0 161 +/- 5.4 Zn-65 243 +/- 12.0 208 +/- 6.9 Mn-54 91.0 +/- 5.0 84.2 +/- 2.8 06/11/15 Water - pCi/L Cr-51 316 +/- 71.0 293 +/- 9.8 Cs-137 148 +/- 9.0 133 +/- 4.4 Cs-134 165 +/- 6.0 173 +/- 5.8 1-131 107 +/- 28.0 93.4 +/- 3.1 Zn-65 309 +/- 22.0 264 +/- 8.8 Co-60 228 +/- 9.0 205 +/- 6.8 Co-58 74.0 +/- 10.0 72.6 +/- 2.4 Mn-54 119 +/- 10.0 107 +/- 3.6 Fe-59 189 +/- 14.0 161 +/-5.4 3

09/11/15 Air Filter - pCi/m Gross Beta 108 +/- 2.0 98.3 +/- 3.28 09/21/15 Air Filter - pCi Zn-65 783 +/- 36.0 685 Cs-134 301 +/- 9.0 349 Cs-137 616 +/- 19.0 613 Co-60 527 +/- 14.0 521 Am-241 33.0 +/- 5.5 36.8 10/05/15 Water- pCi Zn-65 131+/-10.4 126 Cs-134 50.0 +/- 2.8 62.0 Cs-137 144 +/- 6.0 157 Ba-133 22.5 +/- 2.8 32.5 1-131 28.4 +/- 7.0 26.3 59

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table C-1 Results of Participation in Cross Check Programs Reported Sample Type and Cross Check Lab Sample Date Isotope Observed Laboratory's Units Results Results 12/03/15 Air Iodine - pCi 1-131 86.0 +/- 7.0 79.7 +/- 2.6 12/03/15 Air Filter - pCi Zn-65 189 +/- 23.0 173 +/- 5.8 Cs-137 80.0 +/- 9.0 80.0 +/- 2.6 Ce-141 94.0 +/- 7.0 89.8 +/- 3.0 Cr-51 204 +/- 39.0 196 +/- 6.6 Cs-134 98.0 +/- 7.0 112 +/- 3.8 Mn-54 112+/-10.0 101 +/- 3.4 Fe-59 85.0 +/- 12.0 75.1 +/- 2.6 Co-58 75.0 +/- 9.0 76.9 +/- 2.6 Co-60 157 +/- 10.0 149 +/- 5.0 12/03/15 Milk- pCi/L 1-131 108 +/- 18.0 91.2 +/- 3.0 Cs-134 156 +/-11.0 160 +/- 5.4 Cs-137 125 +/- 25.0 115 +/- 3.8 Ce-141 146 +/- 16.0 129 +/- 3.8 Mn-54 159 +/- 17.0 145 +/- 4.8 Zn-65 270 +/- 33.0 248 +/- 8.2 Co-60 231 +/- 15.0 213 +/- 7.2 Co-58 116+/-14.0 110 +/- 3.6 Fe-59 123 +/- 20.0 108 +/- 3.6 Cr-51 303 +/- 87.0 281 +/- 9.4 I See discussion at the beginning of the Appendix 60

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table C-2 Results of Quality Assurance Program Type of Original Replicate Sample Type and Location Sample Date Result Units Split Analysis Analysis Analysis Analysis 3 **

Air Iodine - A 1 01/19/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A2 01/19/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A3 01/19/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A4 01/19/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A5 01/19/15 1-131 pCi/m <MDA <MDA 3

Air Filter - A 1 02/02/15 Gamma pCi/m <MDA <MDA <MDA 3 **

Air Filter - A 1 02/02/15 Gross Beta pCi/m 1.6 +/- 0.1 1.5 +/- 0.1 Air Filter - A2 02/02/15 Gamma pCi/m 3 <MDA <MDA <MDA 3 **

Air Filter - A2 02/02/15 Gross Beta pCi/m 1.6 +/- 0.1 1.7 +/- 0.1 3

Air Filter - A3 02/02/15 Gamma pCi/m <MDA <MDA <MDA 3 **

Air Filter - A3 02/02/15 Gross Beta pCi/m 1.7 +/- 0.1 1.6 +/- 0.1 3

Air Filter - A4 02/02/15 Gamma pCi/m <MDA <MDA <MDA 3 **

Air Filter - A4 02/02/15 Gross Beta pCi/m 1.3 +/- 0.1 1.5+/-0.1 3

Air Filter - A5 02/02/15 Gamma pCi/m <MDA <MDA <MDA 3 **

Air Filter - A5 02/02/15 Gross Beta pCi/m 1.7 +/- 0.1 1.7+/-0.1 3

Air Filter - SFA1 02/02/15 Gamma pCi/m <MDA <MDA <MDA 3 **

Air Filter - SFA1 02/02/15 Gross Beta pCi/m 1.7 +/- 0.1 1.5 +/- 0.1 3

Air Filter - SFA2 02/02/15 Gamma pCi/m <MDA <MDA <MDA 3 **

Air Filter - SFA2 02/02/15 Gross Beta pCi/m 1.6 +/- 0.1 1.7+/-0.1 3

Air Filter - SFA3 02/02/15 Gamma pCi/m <MDA <MDA <MDA 3 **

Air Filter - SFA3 02/02/15 Gross Beta pCi/m 1.5 +/- 0.1 1.4 +/- 0.1 3

Air Filter - SFA4 02/02/15 Gamma pCi/m <MDA <MDA <MDA 61

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table C-2 Results of Quality Assurance Program Type of Original Replicate Sample Type and Location Sample Date Result Units Split Analysis Analysis Analysis Analysis Air Filter - SFA4 02/02/15 Gross Beta pCi/m 3 1.5 +/- 0.1 1.5 +/- 0.1 **

3 Air Filter - A 1 02/09/15 Gross Beta pCi/m 2.3 +/- 0.1 2.4 +/- 0.1 **

3 Air Filter - A2 02/09/15 Gross Beta pCi/m 2.4 +/- 0.1 2.4 +/- 0.1 **

3 Air Filter - A3 02/09/15 Gross Beta pCi/m 2.2 +/- 0.1 2.2 +/- 0.1 **

3 Air Filter - A4 02/09/15 Gross Beta pCi/m 2.3 +/- 0.1 2.1+/-0.1 **

3 Air Filter - A5 02/09/15 Gross Beta pCi/m 2.5 +/- 0.1 2.5 +/- 0.1 **

3 Air Filter - SFA1 02/09/15 Gross Beta pCi/m 2.2 +/- 0.1 2.2 +/- 0.1 **

3 Air Filter - SFA2 02/09/15 Gross Beta pCi/m 2.4 +/- 0.1 2.3 +/- 0.1 **

3 Air Filter - SFA3 02/09/15 Gross Beta pCi/m 2.0 +/- 0.1 2.0 +/- 0.1 **

3 Air Filter - SFA4 02/09/15 Gross Beta pCi/m 2.2 +/- 0.1 2.2 +/- 0.1 **

3 Air Iodine - A 1 02/09/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A2 02/09/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A3 02/09/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A4 02/09/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A5 02/09/15 1-131 pCi/m <MDA <MDA **

Bay Water- WA1 03/04/15 Gamma pCi/L <MDA <MDA <MDA Bay Water - WA2 03/04/15 Gamrna pCi/L <MDA <MDA <MDA 3

Air Filter - A1 03/09/15 Gross Beta pCi/m 2.3 +/- 0.1 2.4 +/- 0.1 **

3 Air Filter - A2 03/09/15 Gross Beta pCi/m 2.2 +/- 0.1 2.3 +/- 0.1 **

3 Air Filter - A3 03/09/15 Gross Beta pCi/m 2.2 +/- 0.1 2.2 +/- 0.1 **

3 Air Filter - A4 03/09/15 Gross Beta pCi/m 2.2 +/- 0.1 2.1 +/- 0.1 **

3 Air Filter - A5 03/09/15 Gross Beta pCi/m 2.3 +/- 0.1 2.3 +/- 0.1 **

62

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table C-2 Results of Quality Assurance Program Type of Original Replicate Sample Type and Location Sample Date Result Units Split Analysis Analysis Analysis Analysis 3

Air Filter- SFA1 03/09/15 Gross Beta pCi/m 2.3 +/- 0.1 2.2 +/- 0.1 **

3 Air Filter - SFA2 03/09/15 Gross Beta pCi/m 2.2 +/- 0.1 2.4 +/- 0.1 **

3 Air Filter - SFA3 03/09/15 Gross Beta pCi/m 2.2 +/- 0.1 2.2 +/- 0.1 **

3 Air Filter - SFA4 03/09/15 Gross Beta pCi/m 2.0 +/- 0.1 2.3 +/- 0.1 **

3 Air Iodine - A 1 03/09/15 1-131 pCi/m <MDA .<MDA **

3 Air Iodine - A2 03/09/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A3 03/09/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A4 03/09/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A5 03/09/15 1-131 pCi/m <MDA <MDA **

Shoreline sediment - WB1 03/31/15 Gamma pCi/kg <MDA <MDA <MDA 3

Air Filter - A 1 04/06/15 Gross Beta pCi/m 1.4 +/- 0.1 1.5 +/- 0.1 **

3 Air Filter - A2 04/06/15 Gross Beta pCi/m 1.6+/-0.1 1.6 +/- 0.1 **

3 Air Filter - A3 04/06/15 Gross Beta pCi/m 1.6 +/- 0.1 1.8 +/- 0.1 **

3 Air Filter - A4 04/06/15 Gross Beta pCi/m 1.6 +/- 0.1 1.5 +/- 0.1 **

3 Air Filter - A5 04/06/15 Gross Beta pCi/m 1.6 +/- 0.1 1.6 +/- 0.1 **

3 Air Filter- SFA1 04/06/15 Gross Beta pCi/m 1.5 +/- 0.1 1.5 +/- 0.1 **

3 Air Filter - SFA2 04/06/15 Gross Beta pCi/m 1.6 +/- 0.1 1.7 +/- 0.1 **

3 Air Filter - SFA3 04/06/15 Gross Beta pCi/m 1.5 +/- 0.1 1.3 +/- 0.1 **

3 Air Filter - SFA4 04/06/15 Gross Beta pCi/m 1.5 +/- 0.1 1.5 +/- 0.1 **

3 Air Iodine - A 1 04/06/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A2 04/06/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A3 04/06/15 1-131 pCi/m <MDA <MDA **

63

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table C-2 Results of Quality Assurance Program Type of Original Replicate Sample Type and Location Sample Date Result Units Split Analysis Analysis Analysis Analysis 3 **

Air Iodine - A4 04/06/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A5 04/06/15 1-131 pCi/m <MDA <MDA 3 **

Air Filter - A 1 05/04/15 Gross Beta pCi/m 1.1 +/- 0.1 1.2 +/- 0.1 3 **

Air Filter - A2 05/04/15 Gross Beta pCi/m 1.1 +/- 0.1 1.0 +/- 0.1 3 **

Air Filter - A3 05/04/15 Gross Beta pCi/m 1.1 +/- 0.1 1.1 +/- 0.1 3 **

Air Filter - A4 05/04/15 Gross Beta pCi/m 1.0 +/- 0.1 1.2 +/- 0.1 3 **

Air Filter - A5 05/04/15 Gross Beta pCi/m 1.0 +/- 0.1 1.0 +/- 0.1 3 **

Air Filter- SFA1 05/04/15 Gross Beta pCi/m 0.9 +/- 0.1 1.0 +/- 0.1 3 **

Air Filter - SFA2 05/04/15 Gross Beta pCi/m 1.1 +/- 0.1 1.1 +/- 0.1 3 **

Air Filter- SFA3 05/04/15 Gross Beta.: pCi/m 1.0 +/- 0.1 1.0 +/- 0.1 3 **

Air Filter - SFA4 05/04/15 Gross Beta pCi/m 1.0+/-0.1 1.0 +/- 0.1 3 **

Air Iodine - A 1 05/04/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A2 05/04/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A3 05/04/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A4 05/04/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A5 05/04/15 1-131 pCi/m <MDA <MDA 3 **

Air Filter - A 1 06/08/15 Gross Beta pCi/m 0.7 +/- 0.1 0.8 +/- 0.1 3 **

. Air Filter - A2 06/08/15 Gross Beta pCi/m 0.7+/-0.1 0.8 +/- 0.1 3 **

Air Filter - A3 06/08/15 Gross Beta pCi/m 0.8 +/- 0.1 0.8 +/- 0.1 3 **

Air Filter - A4 06/08/15 Gross Beta pCi/m 0.8 +/- 0.1 0.7 +/- 0.1 3 **

Air Filter - AS 06/08/15 Gross Beta pCi/m 0.9 +/- 0.1 0.8 +/- 0.1 3 **

Air Filter - SFA1 06/08/15 Gross Beta pCi/m 0.7 +/- 0.1 0.8 +/- 0.1 64

January 1 - December 31, 2015 Docket Nos. 50-317/50-318172-8 Table C-2 Results of Quality Assurance Program Type of Original Replicate Sample Type and Location Sample Date Result Units Split Analysis Analysis Analysis Analysis 3 **

Air Filter - SFA2 06/08/15 Gross Beta pCi/m 0.7+/-0.1 0.7 +/- 0.1 3 **

Air Filter - SFA3 06/08/15 Gross Beta pCi/m 0.8 +/- 0.1 0.7 +/- 0.1 3 **

Air Filter - SFA4 06/08/15 Gross Beta pCi/m 0.8 +/- 0.1 0.7 +/- 0.1 3 **

Air Iodine - A 1 06/08/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A2. 06/08/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A3 06/08/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A4 06/08/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A5 06/08/15 1-131 pCi/m <MDA <MDA Broccoli - IB2 06/15/15 Gamma pCi/kg <MDA <MDA <MDA Broccoli - IB5 06/15/15 Gamma pCi/kg <MDA <MDA <MDA Broccoli - IB8 06/15/15 Gamma pCi/kg <MDA <MDA <MDA Brussels sprouts - IB3 06/15/15 Gamma pCi/kg <MDA <MDA <MDA Brussels sprouts - IB6 06/15/15 Gamma pCi/kg <MDA <MDA <MDA Brussels sprouts - IB9 06/15/15 Gamma pCi/kg <MDA <MDA <MDA Cabbage - IB1 06/15/15 Gamma pCi/kg <MDA* <MDA <MDA Cabbage - IB4 06/15/15 Gamma pCi/kg <MDA <MDA <MDA Cabbage - IB7 06/15/15 Gamma pCi/kg <MDA <MDA <MDA 1 **

Bottom sediment - WBS2 06/16/15 Cs-137 pCi/kg 191 +/- 65.8 168 +/- 56.0 1

Bottom sediment - WBS4 06/16/15 Cs-137 pCi/kg 97.7 +/- 52.8 53.1 +/- 52.2 219 +/- 105 Oysters - IA3 06/16/15 Gamma pCi/kg <MDA <MDA <MDA Oysters - IA6 06/16/15 Gamma pCi/kg <MDA <MDA <MDA 3 **

Air Filter - A 1 07/06/15 Gross Beta pCi/m 1.7 +/- 0.1 1.7 +/- 0.1 65

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table C-2 Results of Quality Assurance Program Type of Original Replicate Sample Type and Location Sample Date Result Units Split Analysis Analysis , Analysis Analysis Air Filter - A2 07/06/15 Gross Beta pCi/m 3 1.7 +/- 0.1 1.6 +/- 0.1 **

3 Air Filter - A3 07/06/15 Gross Beta pCi/m 1.6 +/- 0.1 1.6 +/- 0.1 **

3 Air Filter - A4 07/06/15 Gross Beta pCi{m 1.7 +/- 0.1 1.7 +/- 0.1 **

3 Air Filter - A5 07/06/15 Gross Beta pCi/m 1.6 +/- 0.1 1.8 +/- 0.1 **

3 Air Filter - SFA 1 07/06/15 Gross Beta pCi/m 1.6 +/- 0.1 1.7 +/- 0.1 **

3 Air Filter - SFA2 07/06/15 Gross Beta pCi/m 1.6 +/- 0.1 1.8 +/- 0.1 **

3 Air Filter - SFA3 07/06/15 Gross Beta pCi/m 1.9 +/- 0.1 1.8 +/- 0.1 **

3 Air Filter - SFA4 07/06/15 Gross Beta pCi/m 1.7 +/- 0.1 1.7+/-0.1 **

3 Air Iodine - A 1 07/06/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A2 07/06/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A3 07/06/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A4 07/06/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A5 07/06/15 1-131 pCi/m <MDA <MDA **

3 Air Filter - A 1 08/03/15 Gamma pCi/m <MDA <MDA <MDA 3

Air Filter - A2 08/03/15 Gamma pCi/m <MDA <MDA <MDA 3

Air Filter - A3 08/03/15 Gamma pCi/m <MDA <MDA <MDA 3

Air Filter - A4 08/03/15 Gamma pCi/m <MDA <MDA <MDA 3

Air Filter - A5 08/03/15 Gamma pCi/m <MDA <MDA <MDA 3

Air Filter- SFA1 08/03/15 Gamma pCi/m <MDA <MDA <MDA 3

Air Filter - SFA2 08/03/15 Gamma pCi/m <MDA <MDA <MDA 3

Air Filter - SFA3 08/03/15 Gamma pCi/m <MDA <MDA <MDA 3

Air Filter- SFA4 08/03/15 Gamma pCi/m <MDA <MDA <MDA 66

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table C-2 Results of Quality Assurance Program Type of Original Replicate Sample Type and Location Sample Date Result Units Split Analysis Analysis Analysis Analysis 3

Air Filter - A 1 08/10/15 Gross Beta pCi/m 1.9 +/- 0.1 1.9+/-0.1 **

3 Air Filter - A2 08/10/15 Gross Beta pCi/m 1.9 +/- 0.1 1.9 +/- 0.1 **

3 Air Filter - A3 08/10/15 Gross Beta pCi/m 1.8 +/- 0.1 1.8 +/- 0.1 **

3 Air Filter - A4 08/10/15 Gross Beta pCi/m 1.9 +/- 0.1 2.0 +/- 0.1 **

3 Air Filter - AS 08/10/15 Gross Beta pCi/m 2.3 +/- 0.2 2.2 +/- 0.1 **'

3 Air Filter- SFA1 08/10/15 Gross Beta pCi/m 1.8 +/- 0.1 1.9 +/- 0.1 **

3 Air Filter - SFA2 08/10/15 Gross Beta pCi/m 1.9 +/- 0.1 1.8 +/- 0.1 **

3 Air Filter - SFA3 08/10/15 Gross Beta pCi/m 2.0 +/- 0.1 2.0 +/- 0.1 **

3 Air Filter- SFA4 08/10/15 Gross Beta pCi/m 1.8 +/- 0.1 1.8 +/- 0.1 **

3 Air Iodine - A 1 08/10/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A2 08/10/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A3 08/10/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A4 08/10/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - AS 08/10/15 1-131 pCi/m <MDA <MDA **

Bluefish - IA 1 08/18/15 Gamma pCi/kg <MDA <MDA <MDA Bluefish - IA4 08/18/15 Gamma pCi/kg <MDA <MDA <MDA Oysters - IA3 08/18/15 Gamma pCi/kg <MDA <MDA <MDA Oysters - IA6 08/18/15 Gamma pCi/kg <MDA <MDA <MDA 3

Air Filter - A 1 09/07/15 Gross Beta pCi/m 3.2 +/- 0.2 3.1 +/- 0.2 **

3 Air Filter - A2 09/07/15 Gross Beta pCi/m 3.3 +/- 0.2 3.1 +/- 0.2 **

3 Air Filter - A3 09/07/15 Gross Beta pCi/m 3.3 +/- 0.2 3.3 +/- 0.2 **

3 Air Filter - A4 09/07/15 Gross Beta pCi/m 3.2 +/- 0.2 3.1 +/- 0.2 **

67

January 1 - December 31, 2015 DocketNos. 50-317/50-318/72-8 Table C-2 Results of Quality Assurance Program Type of Original Replicate Sample Type and Location Sample Date Result Units Split Analysis Analysis Analysis Analysis Air Filter - A5 09/07/15 Gross Beta pCi/m 3 3.6 +/- 0.2 3.6 +/- 0.2 **

3 **

Air Filter - SFA1 09/07/15 Gross Beta pCi/m 3.3 +/- 0.2 3.1 +/- 0.2 3

Air Filter - SFA2 09/07/15 Gross Beta pCi/m 3.4 +/- 0.2 3.4 +/- 0.2 **

3 **

Air Filter - SFA3 09/07/15 Gross Beta pCi/m 3.5 +/- 0.2 3.4 +/- 0.2 3 **

Air Filter - SFA4 09/07/15 Gross Beta pCi/m 3.2 +/- 0.2 3.2 +/- 0.2 3 **

Air Iodine - A 1 09/07/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A2 09/07/15 1-131 pCi/m <MDA <MDA Air Iodine - A3 09/07/15 1-131 pCi/m 3 <MDA <MDA **

3 **

Air Iodine - A4 09/07/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A5 09/07/15 1-131 pCi/m <MDA <MDA Misc ground coverage -

SFB1 09/28/15 Gamma pCi/kg <MDA <MDA **

Misc ground coverage -

SFB3 09/28/15 Gamma pCi/kg <MDA <MDA **

3 **

Air Filter - A 1 10/05/15 Gros~ Beta pCi/m 0.7+/-0.1 0.7 +/- 0.1 3 **

Air Filter - A2 10/05/15 Gross Beta pCi/m 0.7 +/- 0.1 0.8 +/- 0.1 3 **

Air Filter - A3 10/05/15 Gross Beta pCi/m 0.8 +/- 0.1 0.8 +/- 0.1 3 **

Air Filter - A4 10/05/15 Gross Beta pCi/m 0.8 +/- 0.1 0.8 +/- 0.1 3 **

Air Filter - A5 1Q/05/15 Gross Beta pCi/m 0.8 +/- 0.1 0.9 +/- 0.1 3 **

Air Filter- SFA1 10/05/15 Gross Beta pCi/m 1.3 +/- 0.1 1.2 +/- 0.1 3 **

Air Filter - SFA2 10/05/15 Gross Beta pCi/m 0.8 +/- 0.1 0.9 +/- 0.1 Air Filter - SFA3 10/05/15 Gross Beta pCi/m 3 0.9 +/- 0.1 0.8 +/- 0.1 **

3 **

Air Filter - SFA4 10/05/15 Gross Beta pCi/m 0.8 +/- 0.1 0.9 +/- 0.1 68

January 1 - December 31, 2015 Docket Nos. 50-317/50-318172-8 Table C-2 Results of Quality Assurance Program Type of Original Replicate Sample Type and Location Sample Date Result Units Split Analysis Analysis Analysis Analysis Air Iodine - A 1 10/05/15 1-131 pCi/m 3 <MDA <MDA **

3 **

Air Iodine - A2 10/05/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A3 10/05/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A4 10/05/15 1-131 pCi/m <MDA <MDA 3 **

• Air Iodine - A5 10/05/15 1-131 pCi/m <MDA <MDA Oysters - IA3 10/21/15 Gamma pCi/kg <MDA <MDA <MDA Oysters - IA6 10/21/15 Gamma pCi/kg <MDA <MDA <MDA Misc ground coverage -

SFB2 10/27/15 Gamma pCi/kg <MDA <MDA **

Misc ground coverage -

SFB4 10/27/15 Gamma pCi/kg <MDA <MDA **

Soil - SFS2 10/27/15 Cs-137 pCi/kg 49.4 +/- 29.2 33.2 +/- 31.4 **

Bay Water-WA1 11/02/15 Gamma pCi/L <MDA <MDA <MDA Bay Water- WA2 11/02/15 Gamma pCi/L <MDA <MDA <MDA Air Filter - A 1 11/09/15 Gross Beta pCi/m 3

2.2 +/- 0.1 2.4 +t- 0.1 **

3 **

Air Filter - A2 11/09/15 Gross Beta pCi/m 2.0 +/- 0.1 2.2 +/- 0.1 3 **

Air Filter - A3 11/09/15 Gross Beta pCi/m 2.1+/-0.1 2.5 +/- 0.1 3 **

Air Filter - A4 11/09/15 Gross Beta pCi/m 2.1 +/- 0.1 2.3 +/- 0.1 3 **

Air Filter - A5 11/09/15 Gross Beta pCi/m 2.0 +/- 0.1 2.3 +/- 0.1 3 **

Air Filter - SFA1 11/09/15 Gross Beta pCi/m 2.5 +/- 0.1 2.6 +/- 0.1 3 **

Air Filter - SFA2 11/09/15 Gross Beta pCi/m 2.1 +/- 0.1 2.4 +/- 0.1 3 **

Air Filter - SFA3 11/09/15 Gross Beta pCi/m 1.9 +/- 0.1 2.0 +/- 0.1 3 **

Air Filter - SFA4 11/09/15 Gross Beta pCi/m 2.1+/-0.1 2.2 +/- 0.1 69

January 1 - December 31, 2015 DocketNos. 50-317/50-318/72-8 Table C-2 Results of Quality Assurance Program Type of Original Replicate Sample Type and Location Sample Date Result Units Split Analysis Analysis Analysis Analysis 3

Air Iodine - A 1 11/09/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A2 11/09/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A3 11/09/15 1-131 pCi/m <MDA <MDA **

Air Iodine - A4 11/09/15 1-131 pCi/m 3 <MDA <MDA **

3 Air Iodine - A5 11/09/15 1-131 pCi/m <MDA <MDA **

3 Air Filter - A1 12/07/15 Gross Beta pCi/m 3.9 +/- 0.2 3.9 +/- 0.2 **

3 Air Filter - A2 12/07/15 Gross Beta pCi/m 3.2 +/- 0.2 3.4 +/- 0.2 **

3 Air Filter - A3 12/07/15 Gross Beta pCi/m 3.2 +/- 0.2 3.2 +/- 0.2 **

3 Air Filter - A4 12/07/15 Gross Beta pCi/m 3.5 +/- 0.2 3.5 +/- 0.2 **

3 Air Filter - A5 12/07/15 Gross Beta pCi/m 3.4 +/- 0.2 3.6 +/- 0.2 **

3 Air Filter- SFA1 12/07/15 Gross Beta pCi/m 3.6 +/- 0.2 4.1 +/- 0.2 **

3 Air Filter - SFA2 12/07/15 Gross Beta pCi/m 3.2 +/- 0.2 3.5 +/- 0.2 **

3 Air Filter - SFA3 12/07/15 Gross Beta pCi/m 3.6 +/- 0.2 3.8 +/- 0.2 **

3 Air Filter - SFA4 12/07/15 Gross Beta pCi/m 3.3 +/- 0.2 3.6 +/- 0.2 **

3 Air Iodine - A 1 12/07/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A2 12/07/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A3 12/07/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A4 12/07/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A5 12/07/15 1-131 pCi/m <MDA <MDA **

70

January 1 - December 31, 2015 Docket Nos. 50-317/50-318172-8 Table C-2 Results of Quality Assurance Program Type of Original Replicate Sample Type and Location Sample Date Result Units Split Analysis Analysis Analysis Analysis Gamma field - OROS 07/07/1S TLD mR/90 days 13.9 +/- 1.4 13.6 +/- 1.3 **

Gamma field - DR06 07/07/1S TLD mR/90 days 11.9 +/- 1.4 11.3 +/- 1.1 **

Gamma field - DR07 07/07/1S TLD mR/90 days 11.6 +/- 1.1 11.1 +/- 0.6 **

Gamma field - DR08 07/07/1S TLD mR/90 days 17.0 +/- 1.6 16.2 +/- 1.6 **

Gamma field - DR09 07/07/1S TLD mR/90 days 12.2 +/- 1.3 11.6 +/- 1.2 **

Gamma field - DR10 07/07/1 S TLD rriR/90 days 12.0 +/- 1.2 11.6+/-1.2 **

Gamma field - DR11 07/07/1S TLD mR/90 days 12.4 +/- 0.8 12.1 +/- 1.4 **

Gamma field - DR29 07/07/1S TLD mR/90 days 17.2 +/-1.S 1S.8 +/- 1.4 **

Gamma field - DR31 07/07/1S TLD mR/90 days 17.0 +/-1.6 16.1 +/- 2.0 ***

Gamma field - SFDR14 07/07/1S TLD mR/90 days 31.7 +/- 4.0 40.1+/-2.8 **

Gamma field - SFDR1 S 07/07/1S TLD mR/90 days 2S.7 +/- S.6 24.9 +/- 7.2 **

Gamma field - OROS 01/1S/16 TLD mR/90 days 13.2 +/- 0.8 13.0 +/- 1.4 **

Gamma field - DR06 01/1S/16 TLD mR/90 days 10.9 +/-1.2 11.2 +/- 0.9 **

Gamma field - DR07 01/1S/16 TLD mR/90 days 11.1 +/-0.9 11.0 +/- 1.0 **

Gamma field - DR08 01/1S/16 TLD mR/90 days 1S.7 +/- 1.8 1S.6 +/- 1.S **

Gamma field - DR09 01/1S/16 TLD mR/90 days 11.6+/-0.7 11.2 +/- 0.8 **

Gamma field - DR10 01/15/16 TLD mR/90 days 11.5 +/- 0.7 11.4 +/- 0.9 **

Gamma field - DR11 01/15/16 TLD mR/90 days 12.0 +/- 0.7 11.8 +/- 1.3 **

Gamma field - DR29 01/15/16 TLD mR/90 days 15.8 +/- 1.1 15.9 +/- 1.2 **

Gamma field - DR31 01/15/16 TLD mR/90 days 16.3 +/- 1.1 16.2 +/- 1.6 **

Gamma field - SFDR14 01/15/16 TLD mR/90 days 35.2 +/- 3.7 4S.0 +/- 3.0 **

Gamma field - SFDR15 01/15/16 TLD mR/90 days 28.4 +/- 8.6 29.7 +/- 7.8 **

1 See discussion at the beginning of the Appendix

• • The nature of these samples precluded splitting them with an independent laboratory.

71

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 TABLE C-3 Teledyne Brown Engineering's Typical MDAs for Gamma Spectrometry Selected Bay Water Fish Shellfish Sediment Vegetation Particulates Nu elides pCi/I pCi/kg pCi/kg pCi/kg pCi/kg 10-3pCi/m3 H-3 175 Na-22 1 8 3 12 6 5 Cr-51 12 105 4 104 50 63 Mn-54 1 9 3 12 5 4 Co-58 1 9 4 9 4 5 Fe-59 3 28 9 24 10 12 Co-60 1 9 4 12 5 6 Zn-65 2 20 8 25 10 9 Nb-95 1 12 7 14 6 9 Zr-95 2 18 8 20 9 9 Ru-106 9 75 30 90 41 40 Ag-110m 1 10 10 10 5 4 Te-129m 16 131 60 162 79 95 1-131 4 65 30 35 22 74 Cs-134 1 8 4 10 5 4 Cs-137 1 9 4 10 5 4 Bala-140 3 32 15 25 14 36 Ce-144 7 40 16 54 26 18 72

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 APPENDIXD Land Use Survey Appendix D contains the results of a Land Use Survey conducted around Calvert Cliffs Nuclear Power Plant during this operating period. A table listing the raw data of this survey and a discussion of the results are included in this appendix.

TableD-1 Discussion Land Use Survey A Land Use Survey was conducted to identify, Distance From Plant within a distance of 5 miles, the location of the (miles) nearest milk animal, the nearest residence, and Sector Residence Garden the nearest garden greater than 50 m2 in each of SE 1.5 1.5 the nine sectors over land. A detailed description SSE 1.6 4.2 of the Land Use Survey is given in a separate s 1.6 1.6 document (Ref. 9). The position of the nearest SSW 1.5 1.6 residence and garden in each sector out to 5 miles SW 1.1 1.1 is given in the adjacent table. There are no WSW 1.3 1.4 animals producing milk for human consumption w 1.3 1.6 within the 5 mile radius. The nearest garden WNW 2.7 2.7 location has changed in the Sand SSE sectors NW 2.0 2.2 since 2014 and are still located within the 5-mile radius.

The closest residence is situated in the SW sector and the nearest garden is also in the SW sector, which is one of the least prevalent wind directions. In the S, SSE, and SE sectors, there is the highest probability of wind blowing from the direction of the plant. The two gardens used' for vegetable samples by the REMP have been placed in the sectors with the highest X/Q. One sampling garden is located in the S sector at a distance of 0.4 miles, and another is situated near the site boundary in the SSE sector at a distance of 1.6 miles from the plant. These two sampling sites are considered good indicator locations for radioactive depositions around the plant.

The dose assessment using this operating period meteorological data was performed, and no significant impact from the plant was found.

73

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 APPENDIXE Additional Samples and Analysis Results Appendix Eis a presentation of the analytical results for additional samples collected in the environs of CCNPP. These extra samples are not required by the ODCM (Ref. 6). Table E-1 lists the locations of all the additional samples and the remaining tables in this appendix provide the results. Some of these samples were collected and analyzed to maintain the historical continuity for samples and sampling pathways discontinued when the Environmental Technical Specifications were changed in March, 1985. Additionally, Table E-1 includes the PICs which were phased out in 2011. Dose is instead measured at these locations by TLDs. The TLDs are a more reliable method of measuring dose and the PICS were redundant.

Table E-4 through E-10 contain analytical results for samples taken from the various radiological pathways (i.e., aquatic, atmospheric, terrestrial, and direct radiation) surrounding the plant. In general these results continue the historical trends previously observed in the official sites of the CCNPP REMP and ISFSI.

Table E-10 shows the direct radiation readings from TLDs placed at the perimeter of the Resin Storage Area which is a temporary waste resin storage and cask transfer area located to the west of the ISFSI facility. The TLD values are somewhat higher than those in the REMP program due to their proximity to this source of the radiation. However, when the direct radiation readings for the Resin Storage Area are compared with those from the ISFSI and Site Boundary TLDs, it is apparent that temporary storage of spent resin and cask transfers are having no significant, measurable effect on the environs surrounding CCNPP.

The NEI Industry Groundwater Protection Initiative was established to determine the potential impact nuclear power plants may have on the surrounding environment due to unplanned releases of radioactive liquids. Under the Groundwater Protection Initiative, groundwater monitoring is accomplished through routine sampling of the water table around the plant and analysis for gamma and tritium.

Groundwater samples were collected from 17 on-site piezometer tubes and one subsurface man hole in 2015. These were identified as Piezometers 11-30 and MH24 on Figure E-1, Site Map Groundwater Monitoring Wells. A piezometer tube is a shallow monitoring well which allows access to groundwater at a depth of approximately 40 feet beneath the site. Of the piezometer tubes sampled, # 11 indicated tritium in all four quarterly samples from 2015. Tritium at this location was previously identified and evaluated in December of 2005. The tritium originated from normal radiological waste discharges and was previously reported in the CCNPP Annual Radioactive Effluent Release Reports. The contamination is contained on site. No drinking water has been affected; the groundwater at this location does not impact any drinking water pathway. Two additional samples, collected in the third quarter 2015 at piezometer #19 and at Manhole #24, had positive tritium results. The results were 147 pCi/l at #19 and 151 pCi/l at Manhole #24. These results are well below the investigation level required by station procedures (2000 pCi/l) and tritium was not identified in samples from these locations in the following quarter.

The 2015 analysis results for tritium are shown in Table E-11, and analysis results for gamma emitting radionuclides are shown in Table E-12.

74

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 TABLE OF CONTENTS - ANALYTICAL RESULTS Table Title Page E-1 Locations of Non-Tech Spec Environmental Sampling Stations for Calvert Cliffs Nuclear Power Plant .............................................................................................................................. 76 E-2 Synopsis of2015 Calvert Cliffs Nuclear Power Plant Non-Tech Spec Radiological Environmental Monitoring Program ........................................................................................ 77 E-3 Annual Summary for Calvert Cliffs Nuclear Power Plant Units 1 & 2 Non-Tech Spec Radiological Environmental Monitoring Program .................................................................. 78 E-4 Concentration of Gamma Emitters in Bottom Sediment.. ....................................................... 79 E-5 Concentration oflodine-131 in Filtered Air ............................................................................ 80 E-6 Concentration of Beta Emitters in Air Particulates .................................................................. 82 E-7 Concentration of Gamma Emitters in Air Particulates ............................................................ 84 E-8 Concentration of Tritium and Gamma Emitters in Taylorslsland Well Water.. ...................... 85 E-9 Direct Radiation ....................................................................................................................... 86 E-10

• Direct Radiation from Resin Storage Area .............................................................................. 87 E-11 Concentration of Tritium in Groundwater ............................................................................... 88 E-12 Gross Concentration of Gamma Emitters in Groundwater. ..................................................... 89 Figure Title Page E-1 Site Map Groundwater Monitoring Wells ***************************************'***************************************90 75

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 TABLE E-1 Locations of Non-Tech Spec Environmental Sampling Stations for Calvert Cliffs Nuclear Power Plant Station Description Distance 1 Direction 1 (KM) (Miles (Sector)

A6 Long Beach 4.4 2.7 NW A7 Taylors Island Anderson's Property 12.6 7.8 ENE A8 Cambridge U of MD Estuarine Center 32.0 19.9 NE DR24 Route 4 and Parran Road 3.0 1.9 SW DR25 Camp Conoy Guard House 1.0 0.6 s DR26 Route 235 & Clarks Landing Rd. 20.5 12.7 SW DR27 Route 231 & Route 4 23.0 14.3 NW DR28 Tavlors Island Emergencv Siren #35 12.3 7.6 ENE DR29 Tavlors Island Emernencv Siren #38 12.5 7.8 E DR31 Cambridge U of MD Estuarine Center 32.0 19.9 NE DR32 Twining Property, Taylors Island 12.3 7.6 NE DR33 P.A. Ransome Property Taylors Island 14.8 9.2 ESE DR34 Shoreline at Barge Road 0.2 0.1 NE OSGDRl North of Old Steam Generator Storage Facility 0.3 0.2 SW OSGDR2 West of Old Steam Generator Storage Facility 0.3 0.2 SW PIClL Taylors Island Anderson's Property 12.6 7.8 ENE PIC2L On Site before Entrance to Camp Conoy 0.7 0.4 s PIC3L Meteorological Station 0.8 0.5 WSW PIC4L NNW of ISFSI 0.6 0.4 SW PICSL SSE of ISFSI 0.6 0.4 SSW PIC8L CCNPP Visitor's Center 0.3 0.2 NW RP DRS Resin Storage Area - North Fence Lower 0.7 0.4 SW RPDR6 Resin Storage Area - North Fence Uooer 0.7 0.4 SW RPDR7 Resin Storage Area - West Fence Right 0.7 0.4 SW RPDR8 Resin Storage Area - West Fence Left 0.7 0.4 SW RPDR9 Resin Storage Area - South Fence Upper 0.7 0.4 SW RPDR10 Resin Storage Area - South Fence Lower 0.7 0.4 SW RPDR11 Resin Storage Area - East Fence Left 0.7 0.4 SW RPDR12 Resin Storage Area - East Fence Right 0.7 0.4 SW WBS2 Discharge Area 0.3 0.2 N WBS4 Camp Conoy/Rocky Point 3.0 1.9 SE WWl Taylors Island Anderson's Property 12.6 7.8 ENE 1

Distance and direction from the central point between the two containment buildings.

2 No longer in use. Refer to Appendix E Summary.

76

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table E-2 Synopsis of 2015 Calvert Cliffs Nuclear Power Plant Non-Tech Spec Radiological Environmental Monitoring Program Sample Type Sampling Number of Number Analysis Analysis Number 1 1 Frequency Locations Collected Frequency Analyzed Aquatic Environment Bottom Sediment Q 2 4 Gamma Q 4 Atmospheric Environment Air lodine 2

w 7 358 1-131 W, 358 Air Particulates 3

w 3 150 Gross Beta w 150 Gamma MC 36 .

Direct Radiation Ambient Radiation Q 20 480 TLD Q 480 Terrestrial Environment Groundwater M 1 12 Gamma M 12 H3 M 12 1

W=weekly, M=monthly, Q=quarterly, SA=semiannual, A=annual, C=composite 2

The collection device contains Charcoal 3

Beta counting is performed after >72 hour decay, Gamma spectroscopy performed on monthly composites of weekly samples 77

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table E-3 Annual Summary for Calvert Cliffs Nuclear Power Plant Units 1 & 2 Non-Tech Spec Radiological Environmental Monitoring Program Medium or Type and Total Lower Limit of Indicator Location with Highest Annual Control Locations 1

Pathway Sampled Number of Detection (LLD) Locations Mean Highest Annual Mean (F) I Range Mean (F)/Range 1

(Unit of Analyses (F)/Range Mean Measurement) Performed Name/Distance &

2 Direction Aquatic Environment Bottom Sediment Gamma (4) 17 191 (1/2) Discharge Area 191 (1/2) 125 (2/2)

(pCi/kg) Cs-137 (191) WBS2 (191) (98-153) 0.3 km N Atmospheric Environment Air Particulates Gross Beta (156) 0.5 2. 1 (99/104) Cambridge CA 2.1 (51/52) 1.9 (51/52) 2 3 (10" pCi/m ) (0.7-4.9) 32.0 km NE (0.8-4.2) (0.7-4.7)

Direct Radiation Ambient Radiation TLD (480) 21.15 (480/480) East Fence Left 69.51 (24/24)

(mR/90 days) (9.45-75.99) RPDR11 (58.91-75.99) km 1

Mean and range based upon detectable measurements only. Fraction (F) of detectable measurements at specified location is indicated in parentheses.

2 Distance and direction from the central point between the two containment buildings.

78

January 1 - December 31, 2015 DocketNos. 50-317/50-318/72-8 Table E-4 Concentration of Gamma Emitters in Bottom Sediment (Results in units of pCi/kg (dry)+/- 20')

Sample Code Sample Date Cs-137 Gamma Emitters WBS2 Discharge Area . 6/16/2015 191 +/- 66

• 10/21/2015

• WBS4 1 Camp Conoy/ Rocky Point 6/16/2015 98 +/- 53

• 10/21/2015 153 +/- 46

• 1 Control Location

• All Non-Natural Gamma Emitters <MDA 79

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table E-5 Concentration of Iodine-131 in Filtered Air (Results in units of 10-3 pCi/m3 +/- 2cr) 1 1 Start Date Stop Date CA LB SFA1 SFA2 SFA3 SFA4 Tl Cambridge LONG BEACH MET Station Visitors Center NNWoflSFSI SSE of TAYLOR'S ISFSI ISLAND 12/29/2014 1/5/2015 * * * * * *

• 2 1/5/2015 1/12/2015 * * * * *

• 2 1/12/2015 1/19/2015 * * * * *

• 2 1/19/2015 1/26/2015 * * * * *

• 2 1/26/2015 2/2/2015 * * * * *

• 3 2/2/2015 2/9/2015 * * * * *

• 2/9/2015 2/16/2015 * * * * * *

• 2/16/2015 2/23/2015 * * * * * *

• 2/23/2015 3/2/2015 * * * * * *

• 3/2/2015 3/9/2015 * * * * * *

• 3/9/2015 3/16/2015 * * * * * *

• 3/16/2015 3/23/2015 * * * * * *

• 3/23/2015 3/30/2015 * * * * * *

• 3/30/2015 4/6/2015 * * * * * *

• 4 4/6/2015 4/13/2015 * * * * *

• 4/13/2015 4/20/2015 * * * * * *

• 4/20/2015 4/27/2015 * * * * * *

• 4/27/2015 5/4/2015 * * * * * *

• 5/4/2015 5/11/2015 * * * * * *

• 5/11/2015 5/18/2015 * * * * * *

• 5/18/2015 5/25/2015 * * * * * *

• 5/25/2015 6/1/2015 * * * * * *

• 6/1/2015 6/8/2015 * * * * * *

• 6/8/2015 6/15/2015 * * * * * *

• 6/15/2015 6/22/2015 * * * * * *

• 6/22/2015 6/29/2015 * * * * * *

• 6/29/2015 7/6/2015 * * * * * *

• 7/6/2015 7/13/2015 * * * * * *

• 80

January 1 - December 31, 2015 Docket Nos. 50-317/50-318172-8 Table E-5 Concentration of Iodine-131 in Filtered Air (Results in units of 10-3 pCi/m3 +/- 2a) 1 1 Start Date Stop Date CA LB SFA1 SFA2 SFA3 SFA4 Tl Cambridge LONG BEACH MET Station Visitors Center NNWof ISFSI SSE of TAYLOR'S ISFSI ISLAND 7/13/2015 7/20/2015 * * * * * *

• 7/20/2015 7/27/2015 * * * * * *

• 7/27/2015 8/3/2015 * * * * * *

• 8/3/2015 8/10/2015 * * * * * *

• 8/10/2015 8/17/2015 * * * * * *

• 8/17/2015 8/24/2015 * * * * * *

• 8/24/2015 8/31/2015 * * * * * *

• 8/31/2015 9/7/2015 * * * * * *

• 9/7/2015 9/14/2015 * * * * * *

• 9/14/2015 9/21/2015 * * * * * *

• 9/21/2015 9/28/2015 * * * * * *

• 9/28/2015 10/5/2015 * * * * * *

• 10/5/2015 10/12/2015 * * * * * *

• 10/12/2015 10/19/2015 * * * * * *

• 10/19/2015 10/26/2015 * * * * * *

• 10/26/2015 11/2/2015 * * * * * *

• 11/2/2015 11/9/2015 * * * * * *

• 11/9/2015 11/16/2015 * * * * * *

• 11/16/2015 11/23/2015 * * * * * *

• 11/23/2015 11/30/2015 * * * * * *

• 11/30/2015 12/7/2015 * * * * * *

• 12/7/2015 12/14/2015 * * * * * *

• 12/14/2015 12/21/2015 * * * * * *

• 12/21/2015 12/28/2015 * * * * * *

• 1 Control Location 2

Sampler malfunction/low flow 3

NCR, Lost Sample 4

Power Outage

• <MDA 81

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table E-6 Concentration of Beta Emitters in Air Particulates (Results in units of 10-2 pCi/m3 +/- 2cr) 1 Start Date Stop Date CA LB Tl Cambridge LONG BEACH TAYLOR'S ISLAND 12/29/2014 1/5/2015 2.9 +/- 0.1 2.6 +/- 0.1 2.5 +/- 0.1 2

1/5/2015 1/12/2015 2.5 +/- 0.2 2.2 +/- 0.3 2

1/12/2015 1/19/2015 2.5 +/- 0.2 2.2 +/- 0.2 2

1/19/2015 1/26/2015 1.7 +/- 0.1 1.7+/-0.1 2

1/26/2015 2/2/2015 1.6 +/- 0.1 1.4 +/- 0.1 3

2/2/2015 2/9/2015 2.7 +/- 0.2 2.5 +/- 0.2 2/9/2015 2/16/2015 2.3 +/- 0.1 2.8 +/- 0.2 2.2 +/- 0.1 2/16/2015 2/23/2015 2.0 +/- 0.2 2.7 +/- 0.1 2.5 +/- 0.1 2/23/2015 3/2/2015 2.6 +/- 0.1 2.8 +/- 0.2 2.6 +/- 0.1 3/2/2015 3/9/2015 2.2 +/- 0.1 2.2 +/- 0.1 2.1 +/- 0.1 3/9/2015 3/16/2015 1.8 +/- 0.1 1.7 +/- 0.1 1.7 +/- 0.1 3/16/2015 3/23/2015 1.7 +/- 0.1 1.7+/-0.1 1.8 +/- 0.1 3/23/2015 3/30/2015 1.8 +/- 0.1 1.9 +/- 0.1 1.7+/-0.1 3/30/2015 4/6/2015 1.6 +/- 0.1 1.6 +/- 0.1 1.4 +/- 0.1 4

4/6/2015 4/13/2015 1.3 +/- 0.1 1.1 +/- 0.1 4/13/2015 4/20/2015 1.4 +/- 0.2 1.4 +/- 0.1 1.6 +/- 0.1 4/20/2015 4/27/2015 1.5 +/- 0.1 1.5 +/- 0.1 1.5 +/- 0.1 4/27/2015 5/4/2015 1.1 +/- 0.1 1.0 +/- 0.1 1.0 +/- 0.1 5/4/2015 5/11/2015 2.8 +/- 0.2 2.3 +/- 0.2 2.2 +/- 0.2 5/11/2015 5/18/2015 2.1 +/- 0.1 1.7 +/- 0.1 1.7 +/- 0.1 5/18/2015 5/25/2015 2.3 +/- 0.1 1.9 +/- 0.1 1.8 +/- 0.1 5/25/2015 6/1/2015 1.8 +/- 0.1 1.5 +/- 0.1 1.6 +/- 0.1 6/1/2015 6/8/2015 0.8 +/- 0.1 0.7 +/- 0.1 0.7 +/- 0.1 6/8/2015 6/15/2015 2.3 +/- 0.1 2.1 +/- 0.1 2.1+/-0.1 6/15/2015 6/22/2015 1.9 +/- 0.1 1.6 +/- 0.1 1.6 +/- 0.1 6/22/2015 6/29/2015 1.7 +/- 0.1 1.4 +/- 0.1 1.3 +/- 0.1 6/29/2015 7/6/2015 1.7 +/- 0.1 1.9 +/- 0.1 1.1 +/- 0.1 7/6/2015 7/13/2015 2.1 +/- 0.1 2.0 +/- 0.1 1.9 +/- 0.1 7/13/2015 7/20/2015 2.0 +/- 0.1 1.7 +/- 0.1 1.6 +/- 0.1 7/20/2015 7/27/2015 2.2 +/- 0.1 2.0 +/- 0.1 1.9 +/- 0.1 7/27/2015 8/3/2015 2.7 +/- 0.1 2.2 +/- 0.1 2.1 +/- 0.1 8/3/2015 8/10/2015 1.9 +/- 0.1 1.9 +/- 0.1 1.8 +/- 0.1 8/10/2015 8/17/2015 2.1 +/- 0.1 1.9 +/- 0.1 2.0 +/- 0.1 8/17/2015 8/24/2015 2.2 +/- 0.1 2.1 +/- 0.1 2.1 +/- 0.1 8/24/2015 8/31/2015 2.9 +/- 0.1 2.4 +/- 0.1 2.6 +/- 0.1 8/31/2015 9/7/2015 4.0 +/- 0.2 3.5 +/- 0.2 3.3 +/- 0.2 9/7/2015 9/14/2015 2.0 +/- 0.1 1.7 +/- 0.1 1.6 +/- 0.1 9/14/2015 9/21/2015 3.5 +/- 0.2 3.0 +/- 0.2 3.0 +/- 0.2 9/21/2015 9/28/2015 2.0 +/- 0.1 1.7 +/- 0.1 1.7+/-0.1 82

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table E-6 Concentration of Beta Emitters in Air Particulates (Results in units of 10-2 pCi/m3 +/- 2cr)

Start Date Stop Date CA LB Tl 1 Cambridge LONG BEACH TAYLOR'S ISLAND 9/28/2015 10/5/2015 0.9 +/- 0.1 0.9 +/- 0.1 0.9 +/- 0.1 10/5/2015 10/12/2015 2.1 +/-0.1 2.2 +/- 0.1 2.0 +/- 0.1 10/12/2015 10/19/2015 1.7 +/- 0.1 2.1 +/- 0.1 1.8 +/- 0.1 10/19/2015 10/26/2015 2.0 +/- 0.1 2.3 +/- 0.1 2.4 +/- 0.1 10/26/2015 11/2/2015 1.5 +/- 0.1 1.7+/-0.1 1.7 +/- 0.1 11/2/2015 11/9/2015 2.0 +/- 0.1 2.2 +/- 0.1 2.0 +/- 0.1 11/9/2015 11/16/2015 1.8 +/- 0.1 1.9 +/- 0.1 2.1 +/- 0.1 11/16/2015 11/23/2015 1.8 +/- 0.1 1.9 +/- 0.1 2.0 +/- 0.1 11/23/2015 11/30/2015 1.9 +/- 0.1 2.0 +/- 0.1 1.9 +/- 0.1 11/30/2015 12/7/2015 2.8 +/- 0.2 3.5 +/- 0.2 2.9 +/- 0.2 12/7/2015 12/14/2015 4.2 +/- 0.2 4.9 +/- 0.2 4.7 +/- 0.2 12/14/2015 12/21/2015 1.8 +/- 0.1 2.1 +/- 0.1 2.0 +/- 0.1 12/21/2015 12/28/2015 1.4 +/- 0.1 1.0 +/- 0.1 1.1 +/- 0.1 1

Control Location 2

Sampler malfunction/low flow 3

NCR, Lost Sample 4

Power outage 5

Sampler Malfunction; Loss of Data

• <MDA 83

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table E-7 Concentration of Gamma Emitters in Air Particulates (Results in units of 10-3 pCi/m3 +/- 2cr) 1 Sample Date CA LB Tl Cambridge LONG BEACH TAYLOR'S ISLAND 2/2/2015 * *

• 3/2/2015 * *

• 3/30/2015 * *

• 4/27/2015 * *

• 6/1/2015 * *

• 6/29/2015 * *

• 8/3/2015 * *

• 8/31/2015 * *

• 9/28/2015 * *

• 11/2/2015 * *

• 11/30/2015 * *

• 12/28/2015 * *

• 1 Control Location

• All Non-Natural Gamma Emitters <MDA 84

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table E-8 Concentration of Tritium and Gamma Emitters in Taylors Island Well Water (Results in units of pCi/L +/- 2cr)

Sample Date Gamma Emitters H3 1/20/2015 * <156 2/23/2015 * <156 3/17/2015 * <157 4/20/2015 * <181 5/26/2015 * <182 6/30/2015 * <178 7/27/2015 * <177 8/24/2015 * <178 9/21/2015 * <175 10/20/2015 * <111 11/10/2015 * <109 12/21/2015 * <110

• Non-Natural Gamma Emitters <MDA 85

January 1 - December 31, 2015 Docket Nos. 50-317/50-318172-8 Table E-9 Direct Radiation (Results in units of mR/90 days+/- 2cr)

Site Code Location First Quarter Second Quarter Third Quarter Fourth Quarter DR24 Rt. 4 and Parran Rd. 11.80 +/- 0.80 11.56 +/- 1.20 11.93 +/- 1.36 12.30 +/- 1.26 DR25 Camp Conoy Guard 13.02 +/- 1.15 12.93+/- 1.26 13.48 +/- 1.27 13.37 +/- 0. 79 House DR26 Rt. 235 and Clark's 11.25 +/- 0.35 11.00 +/- 1.26 11.12 +/- 0.96 11.24 +/- 1.00 Landing Road DR27 Rt. 231 and Rt. 4 12.15 +/- 1.01 11.99 +/- 0.92 11.85 +/- 1.20 12.46 +/- 1.09 DR28 Taylors Is. Siren #35 13.69 +/- 0.35 13.58 +/- 1.28 14.14 +/- 1.47 14.95 +/- 1.69 DR29 Taylors Is. Siren #38 14.80 +/- 1.72 15.56 +/- 1.43 14.22 +/- 1.15 15.28 +/- 1.05 DR31 Cambridge 15.49 +/- 1.57 15.05 +/- 0.63 15.75 +/- 0.67 15.81 +/- 1.09 DR32 Twining Property, 14.82 +/- *1.45 14.16 +/- 1.69 16.00 +/- 1.45 15.65 +/- 1.12 Taylors Island DR33 P. A. Ransome Property 15.42 +/- 0.24 15.40 +/- 1.18 16.01 +/- 1.98 16.99 +/- 0.75 DR34 Shoreline at Barge Rd. 9.75 +/- 1.33 9.59 +/- 0. 72 9.76 +/- 0.28 9.45 +/- 0.85 OSG1 North of Old Steam 18.52 +/- 1.24 18.17 +/- 1.50 18.40 +/- 0.57 18.69 +/- 0.71 Generator Storage Facility OSG2 West of Old Steam 15.88 +/- 2.52 15.71 +/- 1.90 15.64 +/- 2.14 16.76 +/- 2.87 Generator Storage Facility 86

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table E-10 Direct Radiation from Resin Storage Area (Results in units of mR/90 days +/- 2cr)

Site Code Location First Quarter Second Quarter Third Quarter Fourth Quarter RPDR05 North Fence Lower 32.44 +/- 3.05 30.66 +/- 3.15 29.58 +/- 1.96 31.82 +/- 2. 76 RPDR06 North Fence Upper 16.13 +/- 1.25 17.29 +/- 1.17 17.33 +/- 1.53 36.99 +/- 2.04 RPDR07 West Fence Right 25.40 +/- 1.51 27.39 +/- 1.32 18.77 +/- 0.87 24.74 +/- 1.02 West Fence Left 20.89 +/- 2.02 20.62 +/- 2.29 18.84 +/- 1.37 19.94 +/- 2.32 RPDR08 South Fence Upper 29.50 +/- 1. 78 29.52 +/- 1.85 27.11 +/- 2.20 27.12 +/- 1.34 RPDR09 South Fence Lower 40.91 +/- 5.60 42.33 +/- 6.22 39.42 +/- 3.91 39.05 +/- 6.53 RPDR10 East Fence Left 73.56 +/- 11.24 75.99 +/- 9.50 69.58 +/- 2.71 58.91 +/- 4.88 RPDR11 East Fence Right 19.45 +/- 1.92 18.85 +/- 1.42 18.76 +/- 2.21 20.84 +/- 1. 75 RPDR12 87

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table E-11 Concentration of Tritium in Groundwater (Results in units of pCi/L +/- 2cr)

By Piezometer Tube Locations Sample 11 12 13 15 18 19 20 21 22 23 24 25 26 27 28 29 30 MH24 Date 02/25/2015 ND ND ND ND ND ND # # # ND ND ND ND ND ND ND ND ND 02/28/2015 ND # # # ND ND ND ND ND ND ND ND ND ND ND ND ND ND 03/02/2015 708+/-149 ND ND ND # # ND ND ND ND ND ND ND ND ND ND ND ND 03/24/2015 ND ND ND ND ND ND ND ND ND # # ND # # # # ND ND 03/25/2015 ND ND ND ND ND ND ND ND ND ND ND # ND ND ND ND # #

06/06/2015 ND ND # # # # # # # ND ND ND ND # ND ND ND #

06/20/2015 1370+/-xxx ND ND ND ND ND ND ND ND # ND ND # ND # ND ND ND 06/22/2015 ND ND ND ND ND ND ND ND ND ND # # ND ND ND # # ND 06/29/2015 ND # ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 07/25/2015 ND ND ND ND ND ND # # # ND ND ND ND ND ND. ND ND ND 08/22/2015 2100+/-224 # # # # # ND ND ND ND ND # ND ND ND ND ND ND 09/19/2015 ND ND ND ND ND ND ND ND ND # # # # # # # # ND 09/28/2015 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 151 +/-97 11/07/2015 ND ND ND # # ND ND ND ND ND ND ND ND ND ND ND ND ND 11/09/2015 ND ND ND ND ND 147+/-96 ND ND ND ND ND ND ND ND ND ND ND ND 11/15/2015 1570+/-222 # # ND ND ND # # # ND ND ND # # # ND ND ND 12/12/2015 ND ND ND ND ND ND ND ND ND ND # # ND ND ND # # #

12/31/2015 ND ND ND ND ND ND ND ND ND # ND ND ND ND ND ND ND ND

1. Tritium Less than minimum Detectable Activity(<MDA)

ND No Data - Quarterly sample obtained as required.

88

January 1 - December 31, 2015 Docket Nos. 50-317 /50-318/72-8 Table E-12 Gross Concentration of Gamma Emitters in Groundwater (Results in units of pCi/L +/- 2cr)

By Piezometer Tube Locations Sample 11 12 13 15 18 19 20 21 22 23 24 25 26 27 28 29 30 MH24 Date 02/25/2015 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 02/28/2015 ND * *

• ND ND ND ND ND ND ND ND ND ND ND ND ND ND 03/02/2015

• ND ND ND *

• ND ND ND ND ND ND ND ND ND ND ND ND 03/24/2015 ND ND ND ND ND ND ND ND ND ND *

• ND ND 03/25/2015 ND ND ND ND ND ND ND ND ND ND ND

• ND ND ND ND 06/06/2015 ND ND ND ND ND ND ND ND ND 06/20/2015 ND ND ND ND ND ND ND ND

• ND ND ND

• ND ND ND 06/22/2015 ND ND ND ND ND ND ND ND ND ND *

• ND ND ND *

• ND 06/29/2015 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 07/25/2015 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 08/22/2015 ND ND ND ND ND ND ND ND ND ND ND 09/19/2015 ND ND ND ND ND ND ND ND ND *

• ND 09/28/2015 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 11/07/2015 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 11/09/2015 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 11/15/2015 ND ND ND ND ND ND ND ND ND

. 12/12/2015 ND ND ND ND ND ND ND ND ND ND ND ND ND 12/31/2015 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND

• All Non-Natural Gamma Emitters <MDA ND No Data - Quarterly sample obtained as required.

89

January 1 - December 31 , 20 15 Docket Nos. 50-317 /50-318/72-8 Figure E-1 Site Map Groundwater Monitoring Wells

• +*

200 Explanation*

IB RGPP Monitoring Locations 90

7 Larry D. Smith Exelon Generation Manager-Regulatory Assurance Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, MD 20657 410-495-5219 Office www.exeloncorp.com Larry.smith2@exeloncorp.com May 5, 2016 U. S. Nuclear Regulatory Commission ATIN: Document Control Desk Washington, DC 20555 Calvert Cliffs Nuclear Power Plant; Unit Nos. 1 & 2; Renewed Facility Operating License Nos. DPR-53 and DPR-69 Docket Nos. 50-317 & 50-318 Independent Spent Fuel Storage Installation; Material License No. SNM-2505 NRC Docket No. 72-8

Subject:

Annual Radiological Environmental Operating Report

References:

1. Calvert Cliffs Nuclear Power Plant Technical Specification 5.6.2

2. Calvert Cliffs Independent Spent Fuel Storage Installation Technical Specification 6.2 In accordance with References 1 and 2, Calvert Cliffs Nuclear Power Plant is submitting the Annual Radiological Environmental Operating Report (Attachment 1).

There are no regulatory commitments contained in this correspondence.

Should you have questions regarding this matter, please con.tact me at (410) 495-5219 or Ms. Brittney O'Connor at (410) 495-4913.

Respectfully,

~.6~

Larry D. Smith Manager-Regulatory Assurance LDS/PSF/bjm

Attachment:

(1) Annual Radiological Environmental Operating Report for the Calvert Cliffs Nuclear Power Plant Units 1 and 2 and the Independent Spent Fuel Storage Installation NRC Resident Inspector, Calvert Cliffs cc: NRC Project Manager, Calvert Cliffs NRC Regional Administrator, Region I s. Gray, MD-DNR

~

t--z;~6 1. {p Ji AA tJl-1'--

Jv.,v15 s

ATTACHMENT (1)

ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT FOR THE CALVERT CLIFFS NUCLEAR POWER PLANT UNITS 1AND2 AND THE INDEPENDENT SPENT FUEL STORAGE INSTALLATION Calvert Cliffs Nuclear Power Plant May 5, 2016

ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT FOR THE CALVERT CLIFFS NUCLEAR POWER PLANT UNITS 1AND2 AND THE INDEPENDENT SPENT FUEL STORAGE INSTALLATION January 1 - December 31, 2015 A. M. Barnett R. V. Ihnacik EXELON GENERATION, LLC MAY2016

January 1 - December 31, 2015 Docket Nos. 50-:317/50-318/72-8 TABLE OF CONTENTS LIST OF FIGURES ............................................................................................................................ ii LIST OF TABLES ............................................................................................................................. iii I.

SUMMARY

........................................................................................................................................ 1 II. CALVERT CLIFFS NUCLEAR POWER PLANT RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ............................................................ 3 II.A. INTRODUCTION ................................................................................................................................................ 3 11.B. PROGRAM ............................................................................................................................................................ 3 11.B.1 Objectives ...................................................................................................................................................... 3 11.B.2 Sample Collection .......................................................................................................................................... 4 11.B.3 Data Interpretation ....................................................................................................................................... 4 11.B.4 Program Exceptions ...................................................................................................................................... 4 11.C. RESULTS AND DISCUSSIONS .......................................................................................................................... 4 11.C.1 Aquatic Environment .................................................................................................................................... 4 11.C.1.a Bay Water .................................................................................................................................................... 4 11.C.l.b Aquatic Organisms ..................................................................................................................................... 5 11.C.1.c Shoreline Sediment ..................................................................................................................................... 5 11.C.2 Atmospheric Environment ........................................................................................................................... 8 11.C.2.a Air Particulate Filters ........................................ :....................................................................................... 8 11.C.2.b Air Iodine ................................................................................................................................................... 8 11.C.3 Terrestrial Environment ........................................................................................................................... 10 11.C.3.a Vegetation ................................................................................................................................................. 10 11.C.4 Direct Radiation .......................................................................................................................................... 10 11.D. CONCLUSION .................................................................................................................................................... 12 III. INDEPENDENT SPENT FUEL STORAGE INSTALLATION RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM .......................................................... 18 III.A. INTRODUCTION .............................................................................................................................................. 18 111.B. PROGRAM ......................................................................................................................................................... 18 111.B.1 Objectives ................................................................................................................................................... 18 111.B.2 Sample Collection ...................................................................................................................................... 19 111.B.3 Data Interpretation ................................................................................................................................... 19 111.B.4 Program Exceptions .................................................................................................................................. 19 111.C. RESULTS AND DISCUSSIONS ...................................................................................................................... 19 111.C.1 Atmospheric Environment ....................................................................................................................... 19 111.C.1.a Air Particulate Filters ............................................................................................................................ 19 111.C.2 Terrestrial Environment .......................................................................................................................... 20 111.C.2.a Vegetation ............................................................................................................................................... 20 111.C.2.b Soils .......................................................................................................... .:............................................. 20 111.C.3 Direct Radiation ........................................................................................................................................ 21 111.D. CONCLUSION ................................................................................................................................................... 21 IV. REFERENCES ............................................................................................................................ 25 APPENDIX A Sample Locations for the REMP and the ISFSI.. ................................................. 26 APPENDIX B Analysis Results for the REMP and the ISFSI ..................................................... 35 APPENDIX C Quality Assurance Program ................................................................................... 56 APPENDIX D Land Use Survey ...................................................................................................... 73 APPENDIX E Additional Samples and Analysis Results ............................................................. 74

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 LIST OF FIGURES Figure Title Page 1 Tritium in Chesapeake Bay Water ............................................................................................. 6 2 Silver-1 lOm and Potassium-40 in Chesapeake Bay Oysters .................................................... ?

3 Nuclear Fallout in the Calvert Cliffs Area ................................................................................. 9 4 Mean TLD Gamma Dose, Calvert Cliffs Nuclear Power Plant.. ........................................... .. 11 5 Atmospheric Dispersion Around CCNPP Average Relative Air Concentrations (X/Q) ........ .14 6 Atmospheric Dispersion Around CCNPP Average Relative Ground Deposition (D/Q) ........ 15 7 Mean TLD Gamma Dose, ISFSI ............................................................................................. 22 A-1 Map of Southern Maryland and Chesapeake Bay Showing Location of Calvert Cliffs Nuclear Power Plant ................................................................................................................ 29 A-2 Calvert Cliffs Nuclear Power Plant Sampling Locations, 0-2 Miles ....................................... 30 A-3 Calvert Cliffs Nuclear Power Plant Sampling Locations, 0-10 Miles ..................................... 31 A-4 Independent Spent Fuel Storage Installation Sampling Locations ........................................... 33 A-5 Enlarged Map of the Independent Spent Fuel Storage Installation Sampling Locations ........ 34 E-1 Site Map Groundwater Monitoring Wells ............................................................................... 90 ii

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 LIST OF TABLES Table Title Page 1 Synopsis of 2015 Calvert Cliffs Nuclear Power Plant Radiological Environmental Monitoring Program ................................................................................................................. 16 2 Annual Summary of Radioactivity in the Environs of the Calvert Cliffs Nuclear Power Plant Units 1 and 2 ................................................................................................................... 17 3 Synopsis of 2015 Calvert Cliffs Nuclear Power Plant Independent Spent Fuel Storage Installation Radiological Environmental Monitoring Program ............................................... 23 4 Annual Summary of Radioactivity in the Environs of the Calvert Cliffs Nuclear Power Plant Independent Spent Fuel Storage Installation .................................................................. 24 A-1 Locations of Environmental Sampling Stations for the Calvert Cliffs Nuclear Power Plant..28 A-2 Locations of Environmental Sampling Stations for the Independent Spent Fuel Storage Installation at Calvert Cliffs .................................................................................................... 32 B-1 Concentration of Tritium and Gamma Emitters in Bay Water ................................................ 37 B-2 Concentration of Gamma Emitters in the Flesh of Edible Fish ............................................... 38 B-3 Concentration of Gamma Emitters in Oyster Samples ............................................................ 39 B-4 Concentration of Gamma Emitters in Shoreline Sediment ..................................................... .40 B-5 Concentration of Iodine-131 in Filtered Air ........................................................................... .41 B-6 Concentration of Beta Emitters in Air Particulates ........................ :........................................ .43 B-7 Concentration of Gamma Emitters in Air Particulates ...................................... ~ .................... .47 B-8a Concentration of Gamma Emitters in Vegetation Samples .................................................... .48 B-8b Concentration of Gamma Emitters in Vegetation From Locations Around the ISFSI.. ......... .49 B-9 Concentration of Gamma Emitters in Soil Samples From Locations Around the ISFSI ........ 50 B-10 Typical MDA Ranges for Gamma Spectrometry .................................................................... 51 B-11 Typical LLDs for Gamma Spectrometry ................................................................................. 52 B-12 Direct Radiation ....................................................................................................................... 53 C-1 Results of Participation in Cross Check Programs .................................................................. 58 C-2 Results of Quality Assurance Program ........................ :........................................................... 61 C-3 Teledyne Brown Engineering's Typical MDAs for Gamma Spectrometry ............................ 72 D-1 Land Use Survey ................................................................................................ *...................... 73 E-1 Locations of Non-Tech Spec Environmental Sampling Stations for Calvert Cliffs Nuclear Power Plant .............................................................................................................................. 76 E-2 Synopsis of 2015 Calvert Cliffs Nuclear Power Plant Non-Tech Spec Radiological Environmental Monitoring Program ........................................................................................ 77 E-3 Annual Summary for Calvert Cliffs Nuclear Power Plant Units 1 & 2 Non-Tech Spec Radiological Environmental Monitoring Program .................................................................. 78 E-4 Concentration of Gamma Emitters in Bottom Sediment ......................................................... 79 E-5 Concentration oflodine-131 in Filtered Air ............................................................................ 80 E-6 Concentration of Beta Emitters in Air Particulates .................................................................. 82 E-7 Concentration of Gamma Emitters in Air Particulates ............................................................ 84 E-8 Concentration of Tritium and Gamma Emitters in Taylorslsland Well Water. ....................... 85 iii

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 E-9 Direct Radiation .......................................................................................*................................ 86 E-10 Direct Radiation from Resin Storage Area .............................................................................. 87 E-11 Concentration of Tritium in Groundwater ............................................................................... 88 E-12 Gross Concentration of Gamma Emitters in Groundwater. ..................................................... 89 iv

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 I.

SUMMARY

During 2015, Calvert Cliffs Nuclear Power Plant (CCNPP) Units 1and2, a total of3460 radiological analyses were performed and the analytical results reviewed. Most of these analyses were performed to satisfy the requirements of the Offsite Dose Calculation Manual (ODCM)

(Ref. 6), the Environmental Technical Specifications (Ref. 5) and the Independent Spent Fuel Storage Installation (ISFSI) Technical Specifications (Ref. 10). Some of these samples, although not required by either the ODCM or the Technical Specifications, were collected to maintain our commitments to the surrounding community and to maintain historical continuity of the CCNPP Radiological Environmental Monitoring Program (REMP) that started in 1970. The entire monitoring program in place around CCNPP is divided into three parts: the original REMP, the ISFSI monitoring program, and the Non-ODCM Radiological Environmental Monitoring. The following paragraphs describe each of these parts in more detail.

A total of 653 radiochemical analyses were performed on 585 environmental samples and 552 thermoluminescent dosimeters (TLDs) were analyzed for ambient radiation exposure rates as part of the original REMP. These analyses were performed to satisfy the requirements of the ODCM (Ref. 6) and the Environmental Technical Specifications (Ref. 5).

For the ISFSI monitoring program, 360 radiochemical analyses were performed on 300 environmental samples, 64 of which were in common with the original REMP. In addition, 480 TLDs, 24 in common with the original REMP, were analyzed for ambient radiation exposure rates. These analyses were performed to satisfy the requirements of the ODCM (Ref. 6) and the ISFSI Technical Specifications (Ref. 10).

In addition, 608 analyses were performed on 542 additional environmental samples, and 480 additional TLDs were analyzed for ambient radiation exposure rates.

And lastly, 283 radiochemical analyses were performed on 217 quality assurance samples and 132 quality assurance TLDs were analyzed as part of an internal and external quality assurance program associated with Teledyne Brown Engineering. Laboratory intercomparison samples obtained from Environmental Resource Associates (ERA) and Analytics' Inc. were also analyzed.

Samples collected from the aquatic environment included bay water, fish, oysters, and shoreline sediment. Bay water was analyzed for tritium and gamma emitters. Fish, oysters, and shoreline sediments were analyzed for gamma emitting radionuclides.

Monitoring the atmospheric environment involved sampling the air at various locations surrounding CCNPP and the ISFSI. Air particulates and gaseous iodine were collected on glass fiber filters and charcoal cartridges, respectively. The particulate filters were analyzed for beta activity and gamma emitting nuclides. The charcoal cartridges were analyzed for airborne gaseous radioiodine.

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Samples from the terrestrial environment consisted of vegetation and soil samples collected and analyzed for gamma emitters. Vegetation samples for the original REMP were also analyzed for 1-131.

Measurements 9f direct radiation, as required by the ODCM, were performed by analyzing TLDs from forty-two locations surrounding CCNPP and the ISFSI.

Natural radioactivity was detected in essentially all 3460 radiological analyses performed. Low levels of man-made fission products were also observed in 15 of these analyses for the CCNPP REMP. All of these observations were attributed to fallout from past atmospheric weapons testing. Detailed discussions about the results of these analyses are contained in the body of this report.

To assess the plant's contribution to the radiation levels of the ambient environment, dose calculations were performed using 2015 data from the plant's effluent releases, 2015 on-site meteorological data, and appropriate pathways. The results of these dose calculations indicate:

a. a maximum thyroid dose of 2.92 x 10-2 mrem via liquid and gaseous pathways, which is about 0.039% of the acceptable limit of 75 mrem/yr as specified in 40CFR190 "Environmental Radiation Protection Standards for Nuclear Power Operations" and 10CFR72.104, "Licensing Requirements for the Independent Storage of Spent Nuclear Fuel and High-Level Radioactive Waste";

b. a maximum whole body dose of 3 .-92 x 10-2 mrem via liquid and gaseous pathways, which is about 0.157% of the acceptable limit of 25 mrem/yr as specified in both 40CFR190 and 10CFR72.104; and

c. a maximum calculated dose to all other organs via liquid and gaseous pathways was equal to 5. 78 x 10-2 mrem to the skin. This dose is about 0.231 % of the allowable limit of25 mrem/yr as specified in both 40CFR190 and 10CFR72.104.

Compared to the previous three years, a slightly"higher amount of radioactivity was released from CCNPP in 2015. This resulted in a proportionately higher calculated offsite dose. However, as indicated by the results of the station's environmental monitoring, there was no increase in radioactivity detected in environmental samples. Thus, it is concluded based upon the levels of radioactivity observed and the various dose calculations performed, that CCNPP Units 1 and 2 and the ISFSI did not cause any significant radiological impact on the surrounding environment.

2

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 II. CALVERT CLIFFS NUCLEAR POWER PLANT RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM II.A. INTRODUCTION The REMP has been conducted in the vicinity of CCNPP since the summer of 1970. The Calvert Cliffs site is an operating nuclear generating station consisting of two pressurized water reactors.

Unit 1 achieved criticality on October 7, 1974 and commenced commercial operation in May 1975. Unit 2 achieved criticality on November 30, 1976 and went into commercial operation April I, 1977. The location of the plant in relation to local metropolitan areas is shown on Figure A-1.

Results of the monitoring program for the pre-operational period have been reported in a series of documents (Ref. 1-4). The results from previous operational periods are contained in annual reports submitted to the Nuclear Regulatory Commission (NRC) as required.

Results of the monitoring program for the current operational period are included in this report.

The report presents the content of the REMP (Table 1), the sampling locations (Appendix A), the summary of the analytical results (Table 2), a compilation of the analytical data (Appendix B),

the results of the Interlaboratory Comparison Program and the Quality Assurance Program (Appendix C), the results of the Land Use Survey (Appendix D), and a compilation of the analytical data for extra samples collected (Appendix E). Interpretation of the data and conclusions are presented in the body of the report.

The environmental surveillance data collected during this reporting period were compared with that generated in previous periods whenever possible to evaluate the environmental radiological impact ofCCNPP Units 1and2.

II.B. PROGRAM Il.B.1 Objectives The objectives of the REMP for the Calvert Cliffs Nuclear Power Plant are:

a. To verify that radioactivity and ambient radiation levels attributable to plant operation are within the limits specified in the ODCM (Ref. 6) and the Environmental Radiation Protection Standards as stated in 40CFR190,

b. To detect any measurable buildup oflong-lived radionuclides in the environment,

c. To monitor and evaluate ambient radiation levels, and

d. To determine whether any statistically significant increase occurs in the concentration of radionuclides in important pathways.

3

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 11.B.2 Sample Collection The locations of the individual sampling stations are listed in Table A-1 and shown in Figures A-2 and A-3. All samples were collected by contractors to, or personnel of Exelon Generation, according to CCNPP Procedures (Ref. 7, 8 and 12).

11.B.3 Data Interpretation Many results in environmental monitoring occur at or below the minimum detectable activity (MDA). In this report, all results at or below the relevant MDA are reported as being "less than" the MDA value.

11.B.4 Program Exceptions There were no program exceptions.

11.C. RESULTS AND DISCUSSIONS All the environmental samples collected during the year were analyzed using Exelon Industrial Services laboratory procedures (Ref. 8) with the exception of Tritium analyzed by Gel Laboratories LLC. (Ref. 14). The analytical results for this reporting period are-presented in Appendix Band are also summarized in Table 2. For discussion, the analytical results are divided into four categories. The categories are the Aquatic Environment, the Atmospheric Environment, the Terrestrial Environment, and Direct Radiation. These categories are further divided into subcategories according to sample type (e.g., Bay Water, Aquatic Organisms, etc.,

for the Aquatic Environment).

• 11.C.1 Aquatic Environment The aquatic environment surrounding the plant was monitored by analyzing samples of bay water, aquatic organisms, and shoreline sediment. These samples were obtained from various sampling locations on the Chesapeake Bay near the plant.

11.C.1.a Bay Water Monthly bay water samples were taken from two locations during the year. These locations are the Intake Area (sample code WAl) and the Discharge Area (sample code WA2). Composite samples were obtained from each location for the entire sampling period. These samples were analyzed for tritium and gamma emitters as shown in Table B-1.

The tritium analyses, performed on quarterly composites of the monthly bay water samples, revealed no evidence of tritium in any of the samples taken from either site throughout the year.

Figure 1 compares tritium observed in the plant discharge and intake with annual effluent releases as reported in the Radioactive Effluent Release Report.

4

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Monthly analyses of bay water samples from both locations for gamma emitters exhibited no detectable concentrations of any plant-related radioi:mclides.

11.C.1.b Aquatic Organisms Twelve samples of aquatic organisms were obtained from four locations during the year.

Samples of fish, when in season, are normally collected from the Discharge Area (sample codes IAl and IA2) and from the Patuxent River (sample codes IA4 and IA5). As shown in Table B-2, two species of fish were sampled at both the plant discharge and the control point in the Patuxent River. Oyster samples were obtained quarterly from Camp Conoy (sample code IA3) and Kenwood Beach (IA6) as shown in Table B-3.

Figure 2 compares K-40 and Ag-1 lOm observed in oysters from Camp Conoy (IA3) with annual effluent releases of Ag-11 Om as reported in the Radioactive Effluent Release Report.

Edible portion of the fish and oyster samples were analyzed for gamma emitters.

Gamma spectrometric analyses of the fish exhibited naturally occurring K-40 but no detectable concentrations of any plant-related radionuclides. Oyster samples likewise exhibited naturally occurring K-40 but no detectable concentrations of any plant-related radionuclides.

11.C.1.c Shoreline Sediment Semiannual shoreline sediment samples are taken from one location during the year. This location is Shoreline at Barge Road (sample code WBl). The semiannual shoreline sediment samples obtained from this location were analyzed for gamma emitters.

Gamma spectrometric analyses of these samples exhibited naturally occurring radionuclides, but no detectable concentration of any plant-related radionuclides, as shown in Table B-4.

5

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 FIGURE 1 Tritium in Chesapeake Bay Water 1200 -

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January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 FIGURE 2 Silver-11 Om and Potassium-40 in Chesapeake Bay Oysters 0.18

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January 1 - December 31, 201S Docket Nos. S0-317/S0-318/72-8 11.C.2 Atmospheric Environment The atmospheric environment was monitored by analyzing air particulate filters and charcoal cartridges (for trapping radioiodine species). These samples were collected from five locations surrounding the plant. These locations are On Site before the Entrance to Camp Conoy (sample code Al), Camp Conoy Road at the Emergency Siren (sample code A2), Bay Breeze Road (sample code A3), Route 76S at Lusby (sample code A4), and at the Emergency Operations Facility (sample code AS).

11.C.2.a Air Particulate Filters Weekly composite air particulate filter samples were collected from the five locations during the year. These samples were analyzed for beta activity and gamma emitters.

Weekly analyses for beta activity on air particulate filters collected from all five locations showed values characteristic of background levels. The values ranged from 0.7 x 10-2 to 4.7 x 10-2 pCi/m3 for the indicator locations and 0.8 x 10-2 to 4.7 x 10-2 pCi/m3 at the control location, as shown in Table B-6. The location with the highest overall mean of 2.1 x10-2 pCi/m3 was AS, Emergency Offsite Facility, the control location, and the mean for indicator locations was 2.0 x 10-2pCi/m3, as shown in Table 2.

Gamma spectrometric analyses of monthly composited air particulate samples exhibited no detectable concentrations of any plant-related radionuclides in any of these samples, as shown in Table B-7. Naturally occurring radionuclides, such as Be-7, were detected in nearly all samples.

Figure 3 depicts the historical trends of beta activity.

11.C.2.b Air Iodine Weekly composited charcoal cartridges (for trapping radioiodine species) were collected from the five locations during the year. These samples were analyzed for radioiodine species. '

Weekly radioiodine analyses of charcoal cartridges collected from all five locations exhibited no detectable concentrations ofl-131, as shown in Table B-S.

Figure 3 depicts the historical trends of radioiodine.

8

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 FIGURE 3 Nuclear Fallout in the Calvert Cliffs Area SURFACE AIR VAPORS, LUSBY, MD (A4) 250 ATMOSPHERIC FALLOUT From Chernobyl c;) 200

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January l - December 31 , 2015 Docket Nos. 50-317/50-318172-8 11.C.3 Terrestrial Environment The terrestrial environment was monitored by analyzing samples of vegetation collected monthly, when available, from various sampling locations near the plant during the normal growing season.

11.C.3.a Vegetation Vegetation samples were collected from three locations during the year. These locations are Garden Plot off Bay Breeze Road (sample codes IBl , IB2 , and IB3), On Site before the Entrance to Camp Conoy (sample codes IB4, IB5, and IB6), and the Emergency Operations Facility (sample codes IB7, IB8, and IB9) . These samples were analyzed for gamma emitters, including analyses for I-131, as shown in Table B-8a.

All samples showed detectable amounts of naturally occurring K-40 and Be-7. No plant related radionuclides were found in any of these samples.

11.C.4 Direct Radiation Direct radiation is measured by a network of TLDs in each overland sector surrounding the Plant both at the plant boundary and at 4 miles from the Plant.

TLDs were collected quarterly from twenty-three locations surrounding the plant. The twenty indicator locations are On Site Along the Cliffs (sample code DRl), Route 765 Auto Dump (sample code DR2), Giovanni's Tavern (sample code DR3), Route 765 across from White Sands Drive (sample code DR4), John's Creek (sample code DRS), Lusby (sample code DR6), On Site before the Entrance to Camp Conoy (sample code DR7), On Site at Emergency Siren (sample code DR8), Bay Breeze Road (sample code DR9), Decatur and Calvert Beach Roads (sample code DRlO), Dirt Road off Mackall and Parran Roads (sample code DRl 1), Mackall and Bowen Roads (sample code DR12), Wallville (sample code DR13), Rodney Point (sample code DR14),

Mill Bridge and Turner Roads (sample code DR15), Appeal School (sample code DR16), Cove Point and Little Cove Point Roads (sample code ORI 7), Cove Point (sample code DR18), Long Beach (sample code DRl 9), and On Site Near Shore (sample code DR20) . The three control locations are the Emergency Operations Facility (sample code DR21), Solomons Island (sample code DR22), and Taylors Island, Anderson ' s Property (sample code DR23) .

At REMP locations the mean 90 day ambient radiation measured at the indicator locations was 12.01 mR and ranged from 9.63 to 15.39 mR as reported in Table 2. The control locations showed a 90 day mean of 13.46 mR with ranges from 11.24 to 16.55 mR. The location with the highest overall mean of 16.18 was Taylors Island, Anderson's Property (sample code DR23) which ranged from 15.68 to 16.55 mR. Figure 4 shows the historical comparison of the average monthly radiation levels per calendar year for TLDs on site, at four miles, and at the control locations. A comparison of the means and ranges of the current TLD data with those of both the historical data and the regional data shows no plant-related contribution to the measured direct radiation exposure.

10

January 1 - December 31 , 2015 Docket Nos. 50-317 /50-318/72-8 FIGURE 4 Mean TLD Gamma Dose, Calvert Cliffs Nuclear Power Plant 6 -+- 4 M il es (DRl0-18)

---

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January 1 - December 31 , 2015 Docket Nos. 50-317 /50-318/72-8 11.D. CONCLUSION No man-made fission or activation by-products attributable to plant operations were observed in the environment surrounding the plant during the year.

Historical trends for tritium in bay water, Ag-1 lOm and K-40 in oyster samples, nuclear fallout in the Calvert Cliffs area, and TLD data are depicted in Figures 1 through 4. As can be seen from these figures, the plant made no adverse radiological contributions to the surrounding environment.

To assess the plant's contribution to the ambient radiation levels of the surrounding environment, dose calculations were performed using the plant's 2015 effluent release data, on site meteorological data (see X/Q and D/Q values presented in Figures 5 and 6), and appropriate pathways. The results of these dose calculations indicate:

Gaseous Pathways A maximum thyroid dose of 1.39 x l 0- 3 mrem to a child via the plume, ground, vegetable, and inhalation pathways at 1.1 km SW of the containments at Calvert Cliffs. This is about 0.002% of the acceptable limit of75 mrern/yr as specified in 40CFR190 and 10CFR72.104.

A maximum whole body gamma dose of 4.34 x 10-4 mrem to a child at 1.1 km SW of the containments at Calvert Cliffs. This is about 0.002% of the acceptable dose limit of 25 mrern/yr as specified in 40CFR190 and 10CFR72.104.

A maximum dose to any other organ, in this case the skin, of 5 .14 x 10-4 mrem to a child at 1.1 km SW of the containments at Calvert Cliffs. This is about 0.002% of the acceptable dose limit of 25 mrern/yr as specified in 40CFR190 and 10CFR72.104.

Liquid Pathways A maximum thyroid dose of 2.78 x 10-2 mrem to a teen for all liquid pathways, which is about 0.037 % of the acceptable dose limit of 75 mrern/yr as specified in 40CFR190 and 10CFR72.104.

A maximum whole body dose of 3.88 x 10-2 mrem to a teen via all liquid pathways, which is about 0.155 % of the acceptable dose limit of 25 mrern/yr as stated in 40CFR190 and 10CFR72.104.

A maximum dose to any other organ, in this case liver, of 5.73 x 10-2 mrem to a teen for all pathways, which is 0.229% of the acceptable dose limit of 25 mrern/yr specified in 40CFR190 and 10CFR72.104.

12

January 1 - December 31, 2015 Docket Nos. 50-317 /50-318172-8 Gaseous and Liquid Pathways Combined A maximum thyroid dose of 2.92 x io- 2 mrem via liquid and gaseous pathways, which is about 0.039% of the acceptable limit of75 mrem/yr as specified in 40CFR190 and 10CFR72.104.

A maximum whole body gamma dose of 3.92 x 10-2 mrem via liquid and gaseous pathways, which is about 0.157% of the acceptable limit of 25 mrem/yr as specified in 40CFRI 90 and 10CFR72.104.

A maximum calculated dose to all other organs via liquid and gaseous pathways was equal to

5. 78 x 10-2mrem to the skin. This dose was about 0.231 % of the allowable limit of 25 mrem/yr as specified in 40CFR190 and 10CFR72.104.

In all cases, the calculated doses are a small fraction of the applicable limits specified in 40CFR190 and 10CFR72.104.

Therefore, it is concluded that the operation of Calvert Cliffs Units 1 and 2 produced radioactivity and ambient radiation levels significantly below the limits of the ODCM, 40CFR190, and 10CFR72.104. There was no significant buildup of plant-related radionuclides in the environment due to the operation of the CCNPP in 2015.

13

January 1 - December 31 , 2015 Docket Nos. 50-317/50-318/72-8 FIGURE 5 Atmospheric Dispersion Around CCNPP Average Relative Air Concentrations (X/Q)

X/Q Sec/mA3

• ~ ~

\t \..

lvert Cliffs 2015.

14

January 1 - December 31 , 2015 Docket Nos. 50-317/50-318172-8 FIGURE 6 Atmospheric Dispersion Around CCNPP Average Relative Ground Deposition (D/Q) 15

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table 1 Synopsis of 2015 Calvert Cliffs Nuclear Power Plant Radiological Environmental Monitoring Program Sample Type Sampling Number of Number Analysis Analysis Number 1

Frequency1 Locations Collected Frequency Analyzed Aquatic Environment Bay Water, Surface MC 2 24 Gamma MC 24 Water, Drinking Water H3 QC 8 2

Fish A 4 4 Gamma A 4 Oysters Q 2 8 Gamma Q 8 Shoreline Sediment SA 2 Gamma SA 2 Atmospheric Environment Air lodine 3

w 5 260 1-131 w 260 Air Particulates 4

w 5 260 Gross Beta w 260 Gamma MC 60 Direct Radiation Ambient Radiation Q 23 552 TLD Q 552 Terrestrial Environment 5 3. M 27 Vegetation M 27 Gamma 1

W=weekly, M=monthly, Q=quarterly, SA=semiannual, A=annual, C=composite 2

Once in Season, July through September 3

The collection device contains Charcoal 4

Beta counting is performed after >72 hour decay, Gamma spectroscopy performed on monthly composites of weekly samples 5

Monthly during growing season when available 16

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table 2 Annual Summary of Radioactivity in the Environs of the Calvert Cliffs Nuclear Power Plant Units 1 and 2 Medium or Type and Total Lower Limit of Indicator Location with Highest Annual Control Locations Pathway Sampled Number of Detection (LLD} Locations Mean Highest Annual Mean (F) I Range 1 Mean (F)/Range 1

(Unit of Analyses (F)/Range Mean Measurement) Performed Name/Distance &

Direction 2 Atmospheric Environment Air Particulates Gross Beta (260) 0.5 2.0 (208/208) EOFA5 2.1 (52/52) 2.1 (52/52)

(10*2 pCi/m 3 ) (0.7-4.7) 19.3 km WNW (0.8-4.7) (0.8-4.7)

Direct Radiation Ambient Radiation TLD (552) 12.01 (480/480) Taylors Island 16.18 (24/24) 13.46 (72/72)

(mR/90 days) (9.63-15.39) DR23 (15.68-16.55) (11.24-16.55) 12.6 km ENE 1

Mean and range based upon detectable measurements only. Fraction (F) of detectable measurements at specified location is indicated in parentheses.

2 Distance and direction from the central point between the two containment buildings. .

17

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 III. INDEPENDENT SPENT FUEL STORAGE INSTALLATION RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM III.A. INTRODUCTION In August 1990 BGE initiated a program of additional radiological environmental monitoring around the site for the Independent Spent Fuel Storage Installation (ISFSI). The first dry fuel storage canister was loaded into the ISFSI in November of 1993 with more canisters being loaded in subsequent years. During 2015, two additional canisters of spent fuel were transferred to the ISFSI.

Results of the monitoring program for the ISFSI for the current period are included in this report.

This report presents the content of the ISFSI REMP (Table 3), the ISFSI sampling locations (Appendix A), the summary of the analytical results of the period (Table 4), and a compilation of the analytical data for the period (Appendix B). Interpretation of the data and conclusions are presented in the body of the report.

The ISFSI monitoring program is as described in this section of the report.

The results were compared with that generated during the previous ISFSI pre-operational periods (Ref.11) and the current and previous CCNPP REMP periods. These results are discussed in more detail in Section III. C.

111.B. PROGRAM 111.B.1 Objectives The objectives of the radiological environmental monitoring program for the ISFSI are:

a. To satisfy the community concern regarding the impact of the ISFSI on the environment,

b. To verify that radioactivity and ambient radiation levels attributable to operation of the ISFSI are within the limits specified in the Environmental Radiation Protection Standards as stated in 40CFRPartl90 and 10CFR72.104,

c. To detect any measurable buildup oflong-lived radionuclides in the environment due to the ISFSI,

d. To monitor and evaluate ambient radiation levels around the ISFSI, and

e. To determine whether any statistically significant increase occurs in the concentration of radionuclides near the ISFSI.

18

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 llI.B.2 Sample Collection The locations of the individual sampling sites are listed in Table A-2 and shown in Figures A-4 and A-5. All samples were collected by contractors to, or personnel of, Exelon Industrial Services personnel according to Exelon Industrial Services Laboratory Procedures (Ref. 7, 8, 12).

Ill.B.3 Data Interpretation Many results in environmental monitoring occur at or below the minimum detectable activity (MDA). In this report, all results at or below the relevant MDA are reported as being "less than" the MDA value.

llI.B.4 Program Exceptions There were no program exceptions during this operating period.

llI.C. RESULTS AND DISCUSSIONS All the environmental samples collected were analyzed using Exelon Industrial Services laboratory procedures (Ref. 8). The analytical results for this reporting period are presented in Appendix Band are also summarized for the period in Table 4. For discussion, the analytical results are divided into three categories. The categories are the Atmospheric Environment, the Terrestrial Environment, and Direct Radiation. These categories are further divided into subcategories according to sample type (e.g., Vegetation and Soil for Terrestrial Environment).

Ill.C.1 Atmospheric Environment The atmospheric environment was monitored by analyzing air particulate filters. These samples were collected from five locations surrounding the ISFSI.

No source of airborne radioiodine exists for the ISFSI. Airborne radioiodine is, therefore, not considered in assessing the radiological impact of the ISFSI.

Ill.C.1.a Air Particulate Filters Weekly composite air particulate filter samples were collected from five locations during the period. These locations are On Site before the Entrance to Camp Conoy (sample code Al; in common with the CCNPP REMP), Meteorological Station (SF Al), CCNPP Visitor's Center (SFA2), NNW of the ISFSI (SFA3), and SSE of the ISFSI (SFA4). These samples were analyzed for beta radioactivity, as shown in Table B-6 and gamma emitting radionuclides, as shown in Table B-7.

19

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Weekly analyses for beta activity on air particulate filters collected from all five locations showed values characteristic oflevels routinely observed in the REMP. As shown in Table 4, these values ranged from 0.7 x 10-2 to 4.7 x 10-2 pCi/m3 for the indicator locations and 0.7 x 10-2 to 4.3 x 10-2 pCi/m3 for the control location. The location with the highest overall mean of 2.0 x 10"2 pCi/m3 was SFA2, Visitors Center.

Gamma spectrometric analyses of monthly composited air particulate samples exhibited no detectable concentrations of any plant-related radionuclides in any of these samples. Naturally occurring radionuclides, such as Be-7, were detected in nearly all samples.

111.C.2 Terrestrial Environment The terrestrial environment was monitored by analyzing samples of vegetation and soil collected quarterly from the vicinity of the air sampling locations for the ISFSI.

111.C.2.a Vegetation Vegetation samples were collected quarterly from five locations during the year. These locations are: Meteorological Station (sample code SFBl), CCNPP Visitor's Center (sample code SFB2),

NNW of the ISFSI (sample code SFB3), SSE of the ISFSI (sample code SFB4), and On Site before the Entrance to Camp Conoy (sample code SFB5).

Vegetation samples were analyzed for gamma emitting radionuclides, as shown in Table B-8b.

Cesium-137 was detected in two samples at an indicator location. The Cs-137 concentration was 51+/-30 pCi/kg on 03/16/2015 and 192 +/- 45pCi/kg on 10/27/2015, both at On Site before the Entrance to Camp Conoy (sample code SFB5). While the presence of Cs 137 in these samples may be plant-related, this range is consistent with that found to be due to the residual fallout from past atmospheric nuclear weapons testing. The activities of this radionuclide are well below the federal limits established in 40CFR190 and 10CFR72.104. The$e results are comparable to those observed in previous annual reporting periods for the CCNPP REMP and in the earlier pre-operational data for the ISFSI. No detectable concentrations of plant-related radionuclides were found in any of these samples. Naturally occurring radionuclides such as K-40 were detected in all samples.

111.C.2.b Soils Soil samples were collected quarterly from five locations surrounding the ISFSI in the vicinity of the air samplers. These locations are: Meteorological Station (sample code SFSl), CCNPP Visitor's Center (sample code SFS2), NNW of the ISFSI (sample code SFS3), SSE of the ISFSI (sample code SFS4), and On Site before the Entrance to Camp Conoy (sample code SFS5).

Soil samples were analyzed for gamma emitting radionuclides, as shown in Table B-9. Cesium-137 was detected in ten quarterly samples from both indicator and control locations. The Cs-137 concentrations ranged from 49 +/- 29 to 171 +/- 51 pCi/kg. While the presence of Cs 13 7 in these samples may be plant-related, this range is consistent with that found to be due to the residual fallout from past atmospheric nuclear weapons testing. The activities of this radionuclide are well below the federal limits established in 40CFR190 and 10CFR72.104. These are comparable 20

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 to those observed in previous annual reporting periods for the CCNPP REMP and in the earlier pre-operational data for the ISFSI. No detectable concentrations of plant-related radionuclides were found in any of these samples. Naturally occurring radionuclides such as K-40 were also detected in all these samples.

111.C.3 Direct Radiation Direct radiation is measured by a network ofTLDs surrounding the ISFSI. These TLDs are collected quarterly from nineteen locations surrounding the ISFSI, plus one control TLD location at the Visitor's Center (sample code SFDR7). The locations include On Site before the Entrance to Camp Conoy (sample code DR7, common to both the CCNPP Program and the ISFSI Program) and the Meteorological Station (sample code DR30, previously a location maintained for historical continuity.) The other sampling locations are: SW ofISFSI, (sample code SFDRl); NNW ofISFSI, (sample code SFDR2); North ofISFSI, (sample code SFDR3); NE of ISFSI, (sample code SFDR4); East ofISFSI, (sample code SFDR5); ESE ofISFSI, (sample code SFDR6); NNW ofISFSI, (sample code SFDR8); SSE ofISFSI, (sample code SFDR9); NW of ISFSI, (sample code SFDRlO); WNW ofISFSI, (sample code SFDRl 1); WSW ofISFSI, (sample code SFDR12); South ofISFSI, (sample code SFDR13); SE ofISFSI, (sample code SFDR14); ENE ofISFSI, (sample code SFDR15); SSW ofISFSI, (sample code SFDR16); NNE ofISFSI, (sample code SFDRl 7) and West ofISFSI, (sample code SFDR18). Sampling locations are shown on Figures A-4 and A-5.

• The mean 90 day ambient radiation measured at the ISFSI indicator locations was 28.39 mR and ranged from 10.45 to 46.36 mR, as shown in Table 4. The control location showed a 90 day mean of 12.88 mR and ranged from 12.34 to 13.44 mR. The location with the highest overall mean of 44.01 mR with a range of 41.09 to 46.29 mR was SFDR18, West ofISFSI. These.

readings are consistent with those expected from the storage of spent fuel in the ISFSI. A comparison of the average monthly radiation levels per calendar year of the ISFSI TLD data from the indicator locations with the ISFSI control location at the Visitor's Center, SFDR7, can be seen in Figure 7.

IllD. CONCLUSION Low levels of Cs-13 7 were observed in the environment surrounding the ISFSI during the period. The Cs-13 7 observations were attributed to fallout from past atmospheric weapons testing. No plant-related radionuclides were observed in the environs of the ISFSI.

In general, the results in the following tables continue the historical trends previously observed at the official sites of the CCNPP REMP.

21

January 1 - December 3 1, 2015 Docket Nos. 50-3 17 /50-3 18172-8 FIGURE 7

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __Mean TLD Gamma Dose, ISFSI 12

--+-- Control Location (SFDR7)

- - - ISFSI Mean (DR7 , SFDRl-6, 8- 18) 10 8

V) ro

"'O

~ 6 0:::

E 2

0 0 N \.() Cl() 0 N <:t \.() Cl() 0 N \.()

O'l O'l O'l O'l 0 0 0 0 0 rl rl rl Calendar Year 22

January 1 - December 31 , 2015 Docket Nos. 50-317150-31 8/72-8 Table 3 Synopsis of 2015 Calvert Cliffs Nuclear Power Plant Independent Spent Fuel Storage Installation Radiological Environmental Monitoring Program Sample Type Sampling Number of Number Analysis Analysis Number 1 1 Frequency Locations Collected Frequency Analyzed Atmospheric Environment Air Particulates 2

w 5 260 Gross Beta w 260 Gamma MC 60 Direct Radiation Ambient Radiation Q 20 480 TLD Q 480 Terrestria l Environment Vegetation Q 5 20 Gamma Q 20 Soil Q 5 20 Gamma Q 20 1

W=weekly, M=monthl y, Q=quarterl y, SA=semiannual, A=annual, C=composite 2

Beta counting is perfor med after >72 hour decay, Gamma spectroscopy perfo rmed on monthl y composites of weekly samples 23

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table 4 Annual Summary of Radioactivity in the Environs of the Calvert Cliffs Nuclear Power Plant Independent Spent Fuel Storage Installation Medium or Type and Total Lower Limit of Indicator Location with Highest Annual Control Locations 1

Pathway Sampled Number of Detection (LLD) Locations Mean Highest Annual Mean (F) I Range Mean (F)/Range (Unit of Analyses 1 Mean Measurement) Performed (F)/Range Name/Distance &

2 Direction Atmospheric Environment Air Particulates Gross Beta (260) 0.5 2.0 (208/208) Visitors Center 2.0 (52/52) 2.0 (52/52)

(10-2 pCi/m 3 ) (0.7-4.7) SFA2 (0 .7-4.3) (0.7-4.3) 0.7 km NNE Direct Radiation Ambient Radiation TLD (480) 28.39 (456/456) West of ISFSI 44.01 (24/24) 12.88 (24/24)

(mR/90 days) (10.45-46.36) SFDR18 (41 .09-46 .29) (12.34-13.44) 0.1 km W Terrestrial Environment Vegetation Gamma (20) 27 122 (2/16) On Site Before 122 (2/4)

(pCi/L) Cs- 137 (51-192) Entrance to Camp (51-192)

Conoy SFB5 0.7 km ESE Soil Gamma (20) 17 125 (6/16) Entrance to Camp 136 (4/4) 61 (4/4)

(pCi/kg) Cs-137 (58-171) Conoy SFS5 (101-171) (49-71) 0.7 km ESE 1

Mean and range based upon detectable measurements on ly. Fraction (F) of detectable measurements at specified location is indicated in parentheses.

2 Distance and direction from the central point between the two contai nment buildings.

24

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 IV. REFERENCES (1) Cohen, L. K., "Preoperational Environmental Radioactivity Monitoring Program at Calvert Cliffs Units 1 and 2, NUS No. 882 Semiannual Report January-June 1971 , December 1971; NUS No . 1025 Annual Report 1971 , March 1973.

(2) Cohen, L. K., "Preoperational Environmental Radioactivity Monitoring Program at Calvert Cliffs Units 1 and 2", NUS No. 1137 Annual Report 1972, December 1973 .

(3) Cohen, L. K. and Malmberg, M.S ., "Preoperational Environmental Radioactivity Monitoring Program at Calvert Cliffs Units 1 and 2", NUS No. 1188, Annual Report 1973 ,

October 1974.

(4) Malmberg, M. S., "Preoperational Environmental Radioactivity Monitoring Program at Calvert Cliffs Units 1 and 2, NUS No. 1333, Data Summary Report, September 1970 to September 1974, July 1975 (5) Calvert Cliffs Nuclear Power Plant, Units 1 and 2, License Nos. DPR-53 and DPR-69, Technical Specification 5.6.2 ; Annual Radiological Environmental Operating Report.

(6) Offsite Dose Calculation Manual for the Calvert Cliffs Nuclear Power Plant.

(7) CP-234, Specification and Surveillance for the Radiological Environmental Monitoring Program.

(8) Exelon Industrial Services Quality Assurance Program Manual (9) Constellation Energy Nuclear Group, "Land Use Survey Around Calvert Cliffs Nuclear Power Plant, August 2015."

(10) Calvert Cliffs Independent Spent Fuel Storage Installation Technical Specifications, Appendix A to Materials License SNM-2505 (11) Baltimore Gas and Electric Company, Radiological Environmental Monitoring Program Pre-Operational Report for the Calvert Cliffs Independent Spent Fuel Storage Installation, August 1990 - November 1993 , February 1994.

(12) CP-501 , Liquid and Steam Sampling Techniques (13) CY-AA-170-1000, Radiological Environmental Monitoring Program (REMP) and Meteorological Program Implementation.

(14) GEL 2015 Annual Quality Assurance Report for the Radiological Environmental Monitoring Program (REMP) 25

January 1 - December 31 , 2015 Docket Nos. 50-317/50-318/72-8 APPENDIX A Sample Locations for the REMP and the ISFSI Appendix A contains information concerning the environmental samples which were collected during this operating period.

Sample locations and specific information about individual locations for the CCNPP REMP are given in Table A-1. Figure A-1 shows the location of the CCNPP in relation to Southern Maryland and the Chesapeake Bay. Figures A-2 and A-3 show the locations of the power plant sampling sites in relation to the plant site at different degrees of detail.

Sample locations and specific information about individual locations for the ISFSI radiological environmental monitoring program are given in Table A-2. Figures A-4 and A-5 show the locations of the ISFSI sampling sites in relation to the plant site at different degrees of detail.

26

January 1 - December 31, 2015 Docket Nos. 50-317 /50-318/72-8 TABLE OF CONTENTS-SAMPLING LOCATIONS A-1 Locations of Environmental Sampling Stations for the Calvert Cliffs Nuclear Power Plant..28 A-2 Locations of Environmental Sampling Stations for the Independent Spent Fuel Storage Installation at Calvert Cliffs ... .. ... ... ... .. ... ....... .. .... ..... ... .. ..... .. ..... ...... ... ......... ... ....................... ... 32 A-1 Map of Southern Maryland and Chesapeake Bay Showing Location of Calvert Cliffs Nuclear Power Plant .. ... ........ ....... .. .... .. .. ... .................... ......... ....... .... ............. .. .... ................... .29 A-2 Calvert Cliffs Nuclear Power Plant Sampling Locations, 0-2 Miles ... .... ...... .......................... 30 A-3 Calvert Cliffs Nuclear Power Plant Sampling Locations, 0-10 Miles ...... ... ...... .. .... ... .... ..... .... 31 A-4 Independent Spent Fuel Storage Installation Sampling Locations .. ................ ..... ..... .............. 33 A-5 Enlarged Map of the Independent Spent Fuel Storage Installation Sampling Locations ... ... ..34 27

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 TABLE A-1 Locations of Environmental Sampling Stations for the Calvert Cliffs Nuclear Power Plant 1 1 Distance Direction Station Description (KM) (Miles) (Sector)

A1 2

On Site Before Entrance to Camp Conoy 0.7 0.4 s A2 Camp Conoy Rd , at emergency siren 2.5 1.6 SSE A3 Bay Breeze Rd 2.6 1.6 SE A4 Route 765, Lusby 2.9 1.8 SSW A5 Emergency Operations Facility 19.3 12.0 WNW DR01 On Site, along Cliffs 0.6 0.4 NW DR02 Route 765, Auto Dump 2.7 1.7 WNW DR03 Route 765 , Giovanni's Tavern (Knotty Pine) 2.3 1.4 w DR04 Route 765 , White Sands Drive 2.0 1.2 WSW DR05 Route 765 , John's Creek 2.4 1.5 SW DR06 Route 765 , Lusby 2.9 1.8 SSW DR07 2

On Site Before Entrance to Camp Conoy 0.7 0.4 s OROS Camp Conoy Rd at Emergency Siren 2.5 1.6 SSE DR09 Bay Breeze Rd 2.6 1.6 SE DR10 Calvert Beach Rd and Decatur Street 6.4 4.0 NW DR11 Dirt road off Mackall & Parren Rd 6.6 4.1 WNW DR12 Mackall & Bowen Rds 6.7 4.2 w DR13 Mackall Rd , near Wallville 6.1 3.8 WSW DR14 Rodney Point 6.4 4.0 SW DR15 Mill Bridge & Turner Rds 6.2 3.9 SSW DR16 Across from Appeal School 6.5 4.0 s DR17 Cove Point & Little Cove Point Rds 5.9 3.7 SSE DR18 Cove Point 7.1 4.4 SE DR19 Long Beach 4.4 2.7 NW DR20 On site, near shore 0.4 0.2 NNW DR21 Emergency Operations Facility (EOF) 19.3 12.0 WNW DR22 Solomons Island 12.5 7.8 s DR23 Taylors Island , Anderson 's Property 12.6 7.8 ENE IA1 Discharge Area 0.3 0.2 N IA10 Hog Island 15.3 9.5 SSE IA2 Discharge Vicinity 0.3 0.2 N IA3 Camp Conoy 0.9 0.6 E IA4 Patuxent River 0.0 0.0 Various IA5 Patuxent River 0.0 0.0 Various IA6 Kenwood Beach 10.7 6.7 NNW IB1 Garden Off Bay Breeze Rd 2.6 1.6 SSE IB2 Garden Off Bay Breeze Rd 2.6 1.6 SSE IB3 Garden Off Bay Breeze Rd 2.6 1.6 SSE IB4 On site, before entrance to Camp Conoy 0.7 0.4 s IB5 On site, before entrance to Camp Conoy 0.7 0.4 s IB6 On site, before entrance to Camp Conoy 0.7 0.4 s IB7 Emergency offsite facility 19.3 12.0 WNW IB8 Emergency offsite facility 19.3 12.0 WNW IB9 Emergency offsite facility 19.3 12.0 WNW WA1 Intake area 0.2 0.1 NNE WA2 Discharge area 0.3 0.2 N WB1 Shoreline at Barge Rd . 0.6 0.4 ESE 1

Distance and direction from the central point between the two containment buildings 2

Common to both the REMP and ISFSI monitoring program 28

January 1 - December 31 , 2015 Docket Nos. 50-317 /50-318/72-8 Figure A-1 Map of Southern Maryland and Chesapeake Bay Showing Location of Calvert Cliffs Nuclear Power Plant 29

January l - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Figure A-2 Calvert Cliffs Nuclear Power Plant Sampling Locations 0-2 Miles NE 30

January 1 - December 31 , 2015 Docket Nos. 50-317 /50-318172-8 Figure A-3 Calvert Cliffs Nuclear Power Plant Sampling Locations 0-10 Miles 31

January 1 - December 31 , 2015 Docket Nos. 50-317/50-31 8/72- 8 Table A-2 Locations of Environmental Sampling Stations for the Independent Spent Fuel Storage Installation at Calvert Cliffs 1 1 Distance Direction Station Description (KM) (Sector)

Air Particulate A1 2

On Site Before Entrance to Camp Conoy 0.7 s SFA1 Meteorological Station 0.4 NW SFA2 CCNPP Visitor's Center 0.7 NNE SFA3 NNW of ISFSI 0.1 NNW SFA4 SSE of ISFSF 0.1 SSE Direct Radiation DR07 2

On Site Before Entrance to Camp Conoy 0.7 s DR30 Meteorological Station 0.4 NW SFDR01 SW of ISFSI 0.1 SW SFDR02 NNW of ISFSI 0.1 N SFDR03 North of ISFSI 0.1 N SFDR04 NE of ISFSI 0.1 NE SFDR05 East of ISFSI 0.1 E SFDR06 ESE of ISFSI 0.1 ESE SFDR07 CCNPP Visitor's Center 0.7 NNE SFDR08 NNW of ISFSI 0.1 NNW SFDR09 SSE of ISFSI 0.1 SSE SFDR10 NW of ISFSI 0.1 NW SFDR11 WNW ISFSI 0.1 WNW SFDR12 WSW of ISFSI 0.1 WSW SFDR13 South of ISFSI 0.1 s SFDR14 SE of ISFSI 0.1 SE SFDR15 ENE of ISFSI 0.1 ENE SFDR16 SSW of ISFSI 0.1 SW SFDR17 NNE of ISFSI 0.1 NNE SFDR18 West of ISFSI 0.1 w Vegetation SFB1 ISFSI Vegetation Met Station 0.4 NW SFB2 ISFSI Vegetation Visitors Center 0.7 NNE SFB3 ISFSI Vegetation NNW of ISFSI 0.1 NNW SFB4 ISFSI vegetation SSE of ISFSI 0.1 SSE SFB5 On Site Before Entrance to Camp Conoy 0.7 ESE Soil SFS1 ISFSI Soil Meteorological Station 0.4 NW SFS2 ISFSI Soil CCNPP Visitors Center 0.7 NNE SFS3 ISFSI Soil NNW of ISFSI 0.1 NNW SFS4 ISFSI Soil SSE of ISFSI 0.1 SSE SFS5 ISFSI Soil On Site Before entrance to Camp Conoy 0.7 ESE 1

Distance and di rection fro m the central point of the ISFS I 2

Co mmon to both the REMP and ISFSI monitoring program 32

January 1 - December 31 , 2015 Docket Nos . 50-317 /50-318172-8 Figure A-4 Independent Spent Fuel Storage Installation Sampling Locations

.. ' t'

.. 't ~ "'~ *

._1.I

I *

. ~.

r ----.-~- .

33

January l - December 31 , 2015 Docket Nos. 50-317/50-318/72-8 Figure A-5 Enlarged Map of the Independent Spent Fuel Storage Installation Sampling Locations 34

January 1 - December 31 , 2015 Docket Nos . 50-317/50-318/72-8 APPENDIXB Analysis Results for the REMP and the ISFSI Appendix B is a presentation of the analytical results for the CCNPP and the ISFSI radiological environmental monitoring programs.

35

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 TABLE OF CONTENTS - ANALYTICAL RESULTS B-1 Concentration of Tritium and Gamma Emitters in Bay Water ................................................ 37 B-2 Concentration of Gamma Emitters in the Flesh of Edible Fish ............................................... 38 B-3 Concentration of Gamma Emitters in Oyster Samples ............................................................ 39 B-4 Concentration of Gamma Emitters in Shoreline Sediment.. .................................................... 40 B-5 Concentration oflodine-131 in Filtered Air ........................................................................... .41 B-6 Concentration of Beta Emitters in Air Particulates ................................................................. .43 B-7 Concentration of Gamma Emitters in Air Particulates ........................................................... .47 B-8a Concentration of Gamma Emitters in Vegetation Samples .................................................... .48 B-8b Concentration of Gamma Emitters in Vegetation From Locations Around the ISFSI.. .......... 49 B-9 Concentration of Gamma Emitters in Soil Samples From Locations Around the ISFSI ........ 50 B-10 Typical MDA Ranges for Gamma Spectrometry .................................................................... 51 B-11 Typical LLDs for Gamma Spectrometry ................................................................................. 52 B-12 Direct Radiation ....................................................................................................................... 53 36

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table B-1 Concentration of Tritium and Gamma Emitters in Bay Water (Results in units of pCi/L +/- 2cr)

Sample Code Sample Date Gamma Emitters H-3 WA1 Intake Vicinity 1/2/2015

• 2/2/2015

• 3/4/2015

• 4/3/2015 * <155 5/3/2015

• 6/1/2015

• 7/3/2015 * <180 8/3/2015

• 9/2/2015

• 10/3/2015 * <179 11/2/2015

• 12/3/2015

• 12/31/2015 * <109 WA2 Discharge Vicinity 1/2/2015

• 2/2/2015

• 3/4/2015

• 4/3/2015 * <156 5/3/2015

• 6/1/2015

• 7/3/2015 * <179 8/3/2015

• 9/2/2015

• 10/3/2015 * <173 11/2/2015

• 12/3/2015

• 12/31/2015 * <110

• All Non-Natural Gamma Emitters <MDA 37

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table B-2 Concentration of Gamma Emitters in the Flesh of Edible Fish (Results in units of pCi/kg (wet) +/- 2cr)

Sample Code Sample Date Sample Type Gamma Emitters IA1 Discharge Area 8/18/2015 Bluefish

• IA2 Discharge Area 9/24/2015 Perch

• IA41 Patuxent River 8/18/2015 Bluefish

• 1 IA5 Patuxent River 9/24/2015 Perch

• 1 Control Location

• All Non-Natural Gamma Emitters <MDA 38

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8

/

Table B-3 Concentration of Gamma Emitters in Oyster Samples (Results in units of pCi/kg (wet) +/- 2cr)

Sample Code Sample Date Gamma Emitters IA3 Camp Conoy 3/24/2015

• 6/16/2015

• 8/18/2015

• 10/21/2015

• 1 IA6 Kenwood Beach 3/24/2015

• 6/16/2015

• 8/18/2015

• 10/21/2015

• 1 Control Location

• All Non-Natural Gamma Emitters <MDA 39 I

I

-- -- I

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 TableB-4 Concentration of Gamma Emitters in Shoreline Sediment (Results in units of pCi/kg (dry)+/- 2cr)

Sample Code Sample Date Gamma Emitters WB1 Shoreline at Barge Rd. 3/31/2015

• 10/27/2015 *

• All Non-Natural Gamma Emitters <MDA 40

January 1 - December 31, 2015 Docket Nos. 50-317/50-318172-8 Table B-5 Concentration of Iodine-131 in Filtered Air (Results in units of 10-3 pCi/m3 +/- 2cr)

A1 1 Start Date Stop Date A2 A3 A4 A5 Entrance to Camp Bay Breeze Route 765 EOF Camp Conoy Rd at Lusby Conoy Siren 12/29/2014 1/5/2015 * * * *

• 1/5/2015 1/12/2015 * * * *

• 1/12/2015 1/19/2015 * * * *

• 1/19/2015 1/26/2015 * * * *

• 1/26/2015 2/2/2015 * * * *

• 2/2/2015 2/9/2015 * * * *

• 2/9/2015 2/16/2015 * * * *

• 2/16/2015 2/23/2015 * * * *

• 2/23/2015 3/2/2015 * * * *

• 3/2/2015 3/9/2015 * * * *

• 3/9/2015 3/16/2015 * * * *

• 3/16/2015 3/23/2015 * * * *

• 3/23/2015 3/30/2015 * * * *

• 3/30/2015 4/6/2015 * * * *

• 4/6/2015 4/13/2015 * * * *

• 4/13/2015 4/20/2015 * * * *

• 4/20/2015 4/27/2015 * * * *

• 4/27/2015 5/4/2015 * * * *

• 5/4/2015 5/11/2015 * * * *

• 5/11/2015 5/18/2015 * * * *

• 5/18/2015 5/25/2015 * * * *

• 5/25/2015 6/1/2015 * * * *

• 6/1/2015 6/8/2015 * * * *

• 6/8/2015 6/15/2015 * * * *

• 6/15/2015 6/22/2015 * * * *

• 6/22/2015 6/29/2015 * * * *

• 6/29/2015 7/6/2015 * * * *

• 7/6/2015 7/13/2015 * * * *

• 7/13/2015 7/20/2015 * * * *

• 7/20/2015 7/27/2015 * * * *

• 7/27/2015 8/3/2015 * * * *

• 8/3/2015 8/10/2015 * * * *

• 8/10/2015 8/17/2015 * * * *

• 8/17/2015 8/24/2015 * * * *

• 8/24/2015 8/31/2015 * * * *

• 41

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table B-5 Concentration of lodine-131 in Filtered Air (Results in units of 10-3 pCi/m3 +/- 2cr)

Start Date Stop Date A1 A2. A3 A4 A5 1 Entrance to Camp Bay Breeze Route 765 EOF Camp Conoy Rd at Lusby Conoy Siren 8/31/2015 9/7/2015 * * * *

• 9/7/2015 9/14/2015 * * * *

• 9/14/2015 9/21/2015 * * * *

• 9/21/2015 9/28/2015 * * * *

• 9/28/2015 10/5/2015 * * * *

• 10/5/2015 10/12/2015 * * * *

• 10/12/2015 10/19/2015 * * * *

• 10/19/2015 10/26/2015 * * * *

• 10/26/2015 11/2/2015 * * * *

• 11/2/2015 11/9/2015 * * * *

• 11/9/2015 11/16/2015 * * * *

• 11/16/2015 11/23/2015 * * * *

• 11/23/2015 11/30/2015 * * * *

• 11/30/2015 12/7/2015 * * * *

• 12/7/2015 12/14/2015 * * * *

• 12/14/2015 12/21/2015 * * * *

• 12/21/2015 12/28/2015 * * * *

• 1 Control Location

• All Non-Natural Gamma Emitters <MDA 42

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 TableB-6 Concentration of Beta Emitters in Air Particulates (Results in units of 10-2 pCi/m3 +/- 2cr)

Start Date Stop Date A1 A2 1 A3 A4 A5 Entrance to Camp Bay Breeze Route 765 EOF Camp Conoy Rd at Lusby Conoy Siren 12/29/2014 1/5/2015 2.8 +/- 0.1 2.7 +/- 0.1 2.5 +/- 0.1 2.8 +/- 0.1 2.6 +/- 0.1 1/5/2015 1/12/2015 2.3 +/- 0.2 2.6 +/- 0.2 2.4 +/- 0.2 2.5 +/- 0.2 2.6 +/- 0.2 1/12/2015 1/19/2015 2.4 +/- 0.2 2.3 +/- 0.2 2.1 +/- 0.2 2.1 +/- 0.1 2.5 +/- 0.2 1/19/2015 1/26/2015 1.6 +/- 0.1 1.5 +/- 0.1 1.5 +/- 0.1 1.7 +/- 0.1 2.0 +/- 0.1 1/26/2015 2/2/2015 1.6 +/- 0.1 1.6 +/- 0.1 1.7 +/- 0.1 1.3 +/- 0.1 1.7+/-0.1 2/2/2015 2/9/2015 2.3 +/- 0.1 2.4 +/- 0.1 2.2 +/- 0.1 2.3 +/- 0.1 2.5 +/- 0.1 2/9/2015 2/16/2015 2.5 +/- 0.2 2.3 +/- 0.2 2.3 +/- 0.2 2.6 +/- 0.2 2.6 +/- 0.2 2/16/2015 2/23/2015 2.3 +/- 0.1 2.4 +/- 0.1 2.8 +/- 0.2 2.5 +/- 0.1 2.5 +/- 0.1 2/23/2015 3/2/2015 2.5 +/- 0.1 2.5 +/- 0.1 2.5 +/- 0.1 2.6 +/- 0.2 2.8 +/- 0.2 3/2/2015 3/9/2015 2.3 +/- 0.1 2.2 +/- 0.1 2.2 +/- 0.1 2.2 +/- 0.1 2.3 +/- 0.1 3/9/2015 3/16/2015 2.0 +/- 0.1 1.9 +/- 0.1 1.9 +/- 0.1 1.9 +/- 0.1 2.0 +/- 0.1 3/16/2015 3/23/2015 1.7 +/- 0.1 1.6 +/- 0.1 1.6 +/- 0.1 1.6 +/- 0.1 1.8 +/- 0.1 3/23/2015 3/30/2015 ~.9 +/- 0.1 1.8 +/- 0.1 2.1 +/- 0.1 1.9 +/- 0.1 1.9 +/- 0.1 3/30/2015 4/6/2015 1.4 +/- 0.1 1.6 +/- 0.1 1.6 +/- 0.1 1.6 +/- 0.1 1.6+/-0.1 4/6/2015 4/13/2015 1.6 +/- 0.1 1.4 +/- 0.1 1.4 +/- 0.1 1.2 +/- 0.1 1.4 +/- 0.1 4/13/2015 4/20/2015 1.5 +/- 0.1 1.5 +/- 0.1 1.4 +/- 0.1 1.5 +/- 0.1 1.5+/-0.1 4/20/2015 4/27/2015 1.6 +/- 0.1 1.5 +/- 0.1 1.6 +/- 0.1 1.5 +/- 0.1 1.6+/-0.1 4/27/2015 5/4/2015 1.1+/-0.1 1.1 +/- 0.1 1.1 +/- 0.1 1.0 +/- 0.1 1.0 +/- 0.1 5/4/2015 5/11/2015 2.1+/-0.1 2.1 +/- 0.1 2.2 +/- 0.1 2.4 +/- 0.2 2.4 +/- 0.2 5/11/2015 5/18/2015 1.6 +/- 0.1 1.5 +/- 0.1 1.6 +/- 0.1 1.8 +/- 0.1 1.8 +/- 0.1 5/18/2015 5/25/2015 2.0 +/- 0.1 1.9 +/- 0.1 2.1 +/- 0.1 2.0 +/- 0.1 2.1 +/- 0.1 5/25/2015 6/1/2015 1.6 +/- 0.1 1.6 +/- 0.1 1.8 +/- 0.1 1.5 +/- 0.1 1.7 +/- 0.1 6/1/2015 6/8/2015 0.7 +/- 0.1 0.7 +/- 0.1 0.8 +/- 0.1 0.8 +/- 0.1 0.9 +/- 0.1 6/8/2015 6/15/2015 2.2 +/- 0.1 2.2 +/- 0.1 2.2 +/- 0.1 2.3 +/- 0.1 2.2 +/- 0.1 6/15/2015 6/22/2015 1.6 +/- 0.1 1.7 +/- 0.1 1.7 +/- 0.1 1.7 +/- 0.1 1.8 +/- 0.1 6/22/2015 6/29/2015 1.3 +/- 0.1 1.4 +/- 0.1 1.4 +/- 0.1 1.5 +/- 0.1 1.6 +/- 0.1 6/29/2015 7/6/2015 1.7 +/- 0.1 1.7 +/- 0.1 1.6 +/- 0.1 1.7 +/- 0.1 1.7 +/- 0.1 7/6/2015 7/13/2015 1.8 +/- 0.1 1.7 +/- 0.1 1.6 +/- 0.1 1.7 +/- 0.1 1.9+/-0.1*

7/13/2015 7/20/2015 1.6 +/- 0.1 1.7 +/- 0.1 1.8 +/- 0.1 1.7 +/- 0.1 1.8+/-0.1 7/20/2015 7/27/2015 1.9 +/- 0.1 1.9+/-0.1 1.9 +/- 0.1 2.0 +/- 0.1 2.1 +/- 0.1 7/27/2015 8/3/2015 . 2.2 +/- 0.1 2.0 +/- 0.1 2.3 +/- 0.1 2.2 +/- 0.1 2.4 +/- 0.1 8/3/2015 8/10/2015 1.9 +/- 0.1 1.9 +/- 0.1 1.9 +/- 0.1 1.9 +/- 0.1 2.4 +/- 0.2 8/10/2015 8/17/2015 1.8 +/- 0.1 1.9 +/- 0.1 1.9 +/- 0.1 1.8 +/- 0.1 2.0 +/- 0.1 8/17/2015 8/24/2015 2.1 +/- 0.1 2.1 +/- 0.1 2.2 +/- 0.1 2.1+/-0.1 2.5 +/- 0.1 8/24/2015 8/31/2015 2.4 +/- 0.1 2.5 +/- 0.1 2.3 +/- 0.1 2.5 +/- 0.1 2.9 +/- 0.1 43

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 TableB-6 Concentration of Beta Emitters in Air Particulates (Results in units of 10-2 pCi/m3 +/- 2cr) 1 Start Date Stop Date A1 A2 A3 A4 A5 Entrance to Camp Bay Breeze Route 765 EOF Camp Conoy Rd at Lusby Conoy Siren 8/31/2015 9/7/2015 3.2 +/- 0.2 3.3 +/- 0.2 3.4 +/- 0.2 3.3 +/- 0.2 3.6 +/- 0.2 9/7/2015 9/14/2015 1.6 +/- 0.1 1.7 +/- 0.1 1.8 +/- 0.1 1.7 +/- 0.1 1.8 +/- 0.1 9/14/2015 9/21/2015 2.9 +/- 0.2 2.8 +/- 0.2 2.8 +/- 0.1 2.9 +/- 0.2 3.1 +/- 0.2 9/21/2015 9/28/2015 1.9 +/- 0.1 1.8 +/- 0.1 2.0 +/- 0.1 1.8 +/- 0.1 1.9 +/- 0.1 9/28/2015 10/5/2015 0.7 +/- 0.1 0.8 +/- 0.1 0.8 +/- 0.1 0.8 +/- 0.1 0.8 +/- 0.1 10/5/2015 10/12/2015 2.0 +/- 0.1 2.0 +/- 0.1 2.3 +/- 0.2 2.1+/-0.1 2.3 +/- 0.2 10/12/2015 10/19/2015 1.9 +/- 0.1 1.9 +/- 0.1 1.7 +/- 0.1 2.0 +/- 0.1 2.2 +/- 0.1 10/19/2015 10/26/2015 2.3 +/- 0.1 2.2 +/- 0.1 2.3 +/- 0.1 2.3 +/- 0.1 2.6 +/- 0.1 10/26/2015 11/2/2015 1.8 +/- 0.1 1.9 +/- 0.1 1.8 +/- 0.1 1.7 +/- 0.1 1.9 +/- 0.1 11/2/2015 11/9/2015 2.2 +/- 0.1 2.0 +/- 0.1 2.1 +/- 0.1 2.1 +/-0.1 2.0 +/- 0.1 11/9/2015 11/16/2015 2.1 +/- 0.1 1.9 +/- 0.1 2.0 +/- 0.2 2.0 +/- 0.1 2.1 +/- 0.2 11/16/2015 11/23/2015 2.1 +/- 0.1 2.2 +/- 0.1 2.2 +/- 0.1 2.0 +/- 0.1 2.1 +/- 0.1 11/23/2015 11/30/2015 2.0 +/- 0.1 2.0 +/- 0.1 2.1 +/- 0.1 2.0 +/- 0.1 2.2 +/- 0.1 11/30/2015 12/7/2015 3.9 +/- 0.2 3.2 +/- 0.2 3.2 +/- 0.2 3.5 +/- 0.2 3.4 +/- 0.2 12/7/2015 12/14/2015 4.7 +/- 0.2 4.3 +/- 0.2 4.4 +/- 0.2 4.5 +/- 0.2 4.7 +/- 0.2 12/14/2015 12/21/2015 1.8 +/- 0.1 1.8 +/- 0.1 1.9 +/- 0.1 1.8 +/- 0.1 2.0 +/- 0.1 12/21/2015 12/28/2015 1.4 +/- 0.1 1.2 +/- 0.1 1.3 +/- 0.1 1.2 +/- 0.1 1.3 +/- 0.1 1

Control Location 44

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table B Continued Concentration of Beta Emitters in Air Particulates (Results in units of 10-2 pCi/m3 +/- 2cr)

Start Date Stop Date SFA1 SFA2 1 SFA3 SFA4 MET Station Visitors NNWof ISFSI SSE of ISFSI Center 12/29/2014 1/5/2015 2.6 +/- 0.1 2.8 +/- 0.1 2.5 +/- 0.1 2.6 +/- 0.1 1/5/2015 1/12/2015 2.6 +/- 0.2 2.5 +/- 0.2 2.2 +/- 0.1 2.3 +/- 0.1 1/12/2015 1/19/2015 2.7 +/- 0.4 2.6 +/- 0.2 2.1 +/- 0.2 2.3 +/- 0.2 1/19/2015 1/26/2015 1.1+/-0.1 1.8 +/- 0.1 1.5 +/- 0.1 1.6 +/~ 0.1 1/26/2015 2/2/2015 1.7 +/- 0.1 1.6 +/- 0.1 1.5 +/- 0.1 1.5 +/- 0.1 2/2/2015 2/9/2015 2.2 +/- 0.1 2.4 +/- 0.1 2.0 +/- 0.1 2.2 +/- 0.1 2/9/2015 2/16/2015 2.6 +/- 0.2 2.8 +/- 0.2 2.3 +/- 0.2 2.6 +/- 0.2 2/16/2015 2/23/2015 2.7 +/- 0.2 2.7 +/- 0.2 2.6 +/- 0.2 2.6 +/- 0.1 2/23/2015 3/2/2015 2.7 +/- 0.2 2.6 +/- 0.1 2.7 +/- 0.2 2.5 +/- 0.1 3/2/2015 3/9/2015 2.3 +/- 0.1 2.2 +/- 0.1 2.2 +/- 0.1 2.0 +/- 0:1 3/9/2015 3/16/2015 1.9 +/- 0.1 1.9 +/- 0.1 1.7 +/- 0.1 1.7 +/- 0.1 3/16/2015 3/23/2015 1.7 +/- 0.1 1.8 +/- 0.1 1.7 +/- 0.1 1.6 +/- 0.1 3/23/2015 3/30/2015 1.8 +/- 0.1 1.9+/-0.1 1.8 +/- 0.1 1.8 +/- 0.1 3/30/2015 4/6/2015 1.5 +/- 0.1 1.6 +/- 0.1 1.5 +/- 0.1 1.5 +/- 0.1 4/6/2015 4/13/2015 1.4 +/- 0.1 1.2 +/- 0.1 1.3 +/- 0.1 1.3 +/- 0.1 4/13/2015 4/20/2015 1.4 +/- 0.1 1.4 +/- 0.1 1.4 +/- 0.1 1.4 +/- 0.1 4/20/2015 4/27/2015 1.5 +/- 0.1 1.5 +/- 0.1 1.7 +/- 0.1 1.5 +/- 0.1 4/27/2015 5/4/2015 0.9 +/- 0.1 1.1+/-0.1 1.0 +/- 0.1 1.0 +/- 0.1 5/4/2015 5/11/2015 2.0 +/- 0.1 2.3 +/- 0.2 2.2 +/- 0.1 2.1 +/- 0.1 5/11/2015 5/18/2015 1.6 +/~ 0.1 1.8 +/- 0.1 1.7 +/- 0.1 1.8 +/- 0.1 5/18/2015 5/25/2015 1.8 +/- 0.1 1.9 +/- 0.1 2.0 +/- 0.1 2.0 +/- 0.1 5/25/2015 6/1/2015 1.4 +/- 0.1 1.7 +/- 0.1 1.6 +/- 0.1 1.7+/-0.1 6/1/2015 6/8/2015 0.7 +/- 0.1 0.7 +/- 0.1 0.8 +/- 0.1 0.8 +/- 0.1 6/8/2015 6/15/2015 2.0 +/- 0.1 2.2 +/- 0.1 2.2 +/- 0.1 2.1 +/- 0.1 6/15/2015 6/22/2015 1.4 +/- 0.1 1.7 +/- 0.1 1.7 +/- 0.1 1.6 +/- 0.1 6/22/2015 6/29/2015 1.3 +/- 0.1 1.5 +/- 0.1 1.4 +/- 0.1 1.5 +/- 0.1 6/29/2015 7/6/2015 1.6 +/- 0.1 1.7 +/- 0.1 1.9 +/- 0.1 1.8 +/- 0.1 7/6/2015 7/13/2015 1.7 +/- 0.1 2.0 +/- 0.1 2.0 +/- 0.1 1.8 +/- 0.1 7/13/2015 7/20/2015 1.6 +/- 0.1 1.7 +/- 0.1 1.6 +/- 0.1 1.8 +/- 0.1 7/20/2015 7/27/2015 1.9 +/- 0.1 2.1+/-0.1 2.0 +/- 0.1 1.9 +/- 0.1 7/27/2015 8/3/2015 2.1 +/- 0.1 2.2 +/- 0.1 2.3 +/- 0.1 2.2 +/- 0.1 8/3/2015 8/10/2015 1.8 +/- 0.1 1.9+/-0.1 2.0 +/- 0.1 1.8 +/- 0.1 8/10/2015 8/17/2015 1.8 +/- 0.1 2.0 +/- 0.1 2.1+/-0.1 2.0 +/- 0.1 8/17/2015 8/24/2015 2.1 +/- 0.1 2.2 +/- 0.1 2.3 +/- 0.1 2.2 +/- 0.1 8/24/2015 8/31/2015 2.6 +/- 0.1 2.7 +/- 0.1 2.6 +/- 0.1 2.6 +/- 0.1 45

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table B Continued Concentration of Beta Emitters in Air Particulates (Results in units of 10-2 pCi/m3 +/- 2cr)

Stop Date SFA1 1 Start Date SFA2 SFA3 SFA4 MET Station Visitors NNW oflSFSI SSE of ISFSI Center 8/31/2015 9/7/2015 3.4 +/- 0.2 3.4 +/- 0.2 3.6 +/- 0.2 3.2 +/- 0.2 9/7/2015 9/14/2015 1.6 +/- 0.1 1.7 +/- 0.1 1.8 +/- 0.1 1.7+/-0.1 9/14/2015 9/21/2015 2.8 +/- 0.2 3.0 +/- 0.2 3.2 +/- 0.2 2.9 +/- 0.2 9/21/2015 9/28/2015 1.7+/-0.1 1.7 +/- 0.1 1.8 +/- 0.1 1.7 +/- 0.1 9/28/2015 10/5/2015 1.3 +/- 0.1 0.9 +/- 0.1 0.9 +/- 0.1 0.8 +/- 0.1 10/5/2015 10/12/2015 2.2 +/- 0.2 2.3 +/- 0.2 2.4 +/- 0.2 1.9 +/- 0.1 10/12/2015 10/19/2015 1.8 +/- 0.1 2.0 +/- 0.1 2.0 +/- 0.1 1.8 +/- 0.1 10/19/2015 10/26/2015 2.2 +/- 0.1 2.3 +/- 0.1 2.4 +/- 0.1 2.3 +/- 0.1 10/26/2015 11/2/2015 1.6 +/- 0.1 1.7+/-0.1 1.7 +/- 0.1 1.7-+/- 0.1 11/2/2015 11/9/2015 2.5 +/- 0.1 2.1 +/-0.1 1.9 +/- 0.1 2.1 +/- 0.1 11/9/2015 11/16/2015 2.0 +/- 0.1 1.9 +/- 0.1 2.0 +/- 0.1

• 1.9 +/- 0.1 11/16/2015 11/23/2015 1.9 +/- 0.1 1.8 +/- 0.1 1.9 +/- 0.1 2.0 +/- 0.1 11/23/2015 11/30/2015 1.9 +/- 0.1 1.9 +/- 0.1 1.9 +/- 0.1 1.5 +/- 0.1 11/30/2015 12/7/2015 3.6 +/- 0.2 3.2 +/- 0.2 3.6 +/- 0.2 3.3 +/- 0.2 12/7/2015 12/14/2015 4.7 +/- 0.2 4.3 +/- 0.2 4.3 +/- 0.2 4.6 +/- 0.2 12/14/2015 12/21/2015 2.3 +/- 0.1 2.0 +/- 0.1 2.1 +/- 0.1 2.1 +/-0.1 12/21/2015 12/28/2015 . 1.4 +/- 0.1 1.3 +/- 0.1 1.4 +/- 0.1 1.2 +/- 0.1 1

Control Location 46

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table B-7 Concentration of Gamma Emitters in Air Particulates (Results in units of 10*3 pCi/m3 +/- 2cr)

Sample Date A1 A2 1 A3 A4 A5 Entrance to Camp Conoy Bay Breeze Route 765 at EOF Camp Conoy Siren Rd Lusby 2/2/2015 * * * *

• 3/2/2015 * * * *

• 3/30/2015 * * * *

• 4/27/2015 * * * *

• 6/1/2015 * * * *

• 6/29/2015 * * * *

• 8/3/2015 * * * *

• 8/31/2015 * * * *

• 9/28/2015 * * * *

• 11/2/2015 * * * *

• 11/30/2015 * * * *

• 12/28/2015 * * * *

• 1 Sample Date SFA1 SFA2 SFA3 SFA4 MET Station Visitors Center NNW oflSFSI SSE of ISFSI 2/2/2015 * * *

• 3/2/2015 * * *

• 3/30/2015 * * *

• 4/27/2015 * * *

• 6/1/2015 * * *

• 6/29/2015 * * *

• 8/3/2015 * * *

• 8/31/2015 * * *

• 9/28/2015 * * *

• 11/2/2015 * * *

• 11/30/2015 * * *

• 12/28/2015 * * *

• 1 Control Location

• All Non-Natural Gamma Emitters <MDA 47

I I

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table B-8a Concentration of Gamma Emitters in Vegetation Samples (Results in units of pCi/kg (wet) +/- 2cr)

Sample Code Sample Date Sample Type Gamma Emitters IB1 Bay Breeze Rd 6/15/2015 Cabbage

• 7/27/2015 Cabbage

• 8/17/2015 Broccoli

• IB2 Bay Breeze Rd 6/15/2015 Broccoli

• 7/27/2015 Broccoli

• 8/17/2015 Brussels sprouts

• IB3 Bay Breeze Rd 6/15/2015 Brussels sprouts

• 7/27/2015 Brussels sprouts

• 8/17/2015 Eggplant Leaves

• IB4 Camp Conoy Entrance 6/15/2015 Cabbage

• 7/27/2015 Cabbage

• 8/17/2015 Broccoli

• IB5 Camp Conoy Entrance 6/15/2015 Broccoli

• 7/27/2015 Broccoli

• 8/17/2015 Brussels sprouts

• IB6 Camp Conoy Entrance 6/15/2015 Brussels sprouts

• 7/27/2015 Brussels sprouts

• 8/17/2015 Eggplant Leaves

• IB?1 EOF 6/15/2015 Cabbage

• 7/27/2015 Cabbage

• 8/17/2015 Broccoli

• 1 IB8 EOF 6/15/2015 Broccoli

• 7/27/2015 Broccoli

• 8/17/2015 Brussels sprouts

• 1 IB9 EOF 6/15/2015 Brussels sprouts

• 7/27/2015 Brussels sprouts

• 8/17/2015 Eggplant Leaves

• 1 Control Location

• All Non-Natural Gamma Emitters <MDA 48

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table B-8b Concentration of Gamma Emitters in Vegetation From Locations Around the ISFSI (Results in units of pCi/kg (wet) +/- 2o-)

Sample Code Sample Date Cs-137 Gamma Emitters SFB1 MET Station 3/16/2015

• 6/24/2015

• 9/28/2015

• 10/2i/2015

• 2 SFB2 Visitor's Center 3/16/2015

• 6/24/2015

• 9/28/2015

• 10/27/2015

• SFB3 NNW oflSFSI 3/16/2015

• 6/24/2015

• 9/28/2015

• 10/27/2015

• SFB4 SSE of ISFSI 3/16/2015

• 6/24/2015

• 9/28/2015

• 10/27/2015

• SFB5 On Site Before Entrance to Camp Conoy 3/16/2015 51 +/- 30

• 1 6/24/2015

• 9/28/2015

• 10/27/2015 192 +/- 45

• 1 This isotope <MDA 2

Control Location

• All Non-Natural Gamma Emitters <MDA 49

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table B-9 Concentration of Gamma Emitters in Soil Samples From Locations Around the ISFSI (Results in units of pCi/kg (dry)+/- 2cr Sample Code Sample Date Cs-137 Gamma Emitters SFS1 MET station 3/16/2015

• 6/24/2015

• 9/28/2015

• 10/27/2015

• 2 SFS2 Visitors Center 3/16/2015 63 +/- 29

• 6/24/2015 71 +/- 35

• 9/28/2015 61 +/- 31

• 10/27/2015 49 +/- 29

• SFS3 NNWof ISFSI 3/16/2015 148 +/- 64

• 6/24/2015 58 +/- 36

• 1 9/28/2015

• 10/27/2015

• SFS4 SSE of ISFSI 3/16/2015

• 6/24/2015

• 9/28/2015

• 10/27/2015

• SFS5 Entrance to Camp Conoy 3/16/2015 128 +/- 27

• 6/24/2015 171 +/-51

• 9/28/2015 101 +/- 27

• 10/27/2015 144 +/- 44

• 1 This isotope <MDA 2

Control Location

• All Non-Natural Gamma Emitters <MDA 50

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table B-10 Typical MDA Ranges for Gamma Spectrometry Bay Water, Air Surface Shoreline Selected Fish Groundwater Oysters Soil (pCi/kg) Vegetation Particulates Water, Milk (pCi/L) Sediment Nuclides (pCi/Kg) Wet (pCi/L) (pCi/kg) Wet Dry (pCi/L) Wet (10-2 pCi/m 3 ) Drinking (pCi/kg) Dry Water (pCi/L)

Na-22 0- .6 2.3 - 4.7 0 - 62.3 2.3- 5.1 3.9- 9.6 3.4 - 32.1 38.7-71.7 35.5 - 82.6 12.1 - 44.8 K-40 0- 5.8 24.1 - 53.5 0 - 487.3 23.8 - 57.3 22.2 - 77.4 31.8- 222 274 - 580 241 - 739 54.8-422 Cr-51 0- 5.1 20.8 - 37.2 0 - 1576 20.7 - 37.6 27 - 55.6 0-479 195 - 733 289 - 643 53 - 276 Mn-54 0 - .4 2.1 - 4.2 0 - 58.1 2.1 - 4.6 2.9 - 7.2 5.4- 44 32.8- 58.1 30.1 - 73.9 9.2 - 35.4 Co-58 0 - .5 2.3 - 4.3 0 - 89.1 2.2 - 4.7 3 - 6.9 1.6- 59.7 32.5 - 62.1 31 - 72.1 8.7 - 35.4 Fe-59 0 - 1.4 5.2 - 9.7 0-287 5 - 10 8.2-17.2 17.3 - 5439 51.8-188 74.5 - 164 22.9 - 78.1 Co-60 0- .5 2.3 - 4.5 0 - 60.2 2.1 - 5 3.2 - 8.3 8.2 - 42.4 32.8 - 63.2 33.3 - 73.3 11.1 - 40.9 Zn-65 0 - 1.1 4.6- 9.1 27.2 - 61.7 4.4 - 11.4 8.2 - 19 17.5 - 97.3 90.8 - 153 83.9 - 197 24.2 - 87 Nb-95 0- .7 2.7 - 4.8 0 - 180 2.4 - 5.3 3.1 - 7.1 0 - 51.3 30.9 - 102 43.4 - 96.6 9.3 - 37.4 Zr-95 0 - .9 4.1 - 7.5 0 - 163 4.1 - 7.8 5.2 - 11.8 0 - 91.3 55.4-119 57.6 - 131 15.6 - 60.6 Ru-106 0- 3.5 18.4 - 36.8 0-450 19.4- 39.2 23.6 - 59.2 0 - 271 267 - 483 265 - 578 75 - 312 Ag-110m 0-0 2-4 0 - 63.8 2.1 - 4.4 2.6 - 6.7 .4 - 25.6 31.9-48.7 34.8 - 78.8 7.8 - 35.1 1

1-131 0-0.4 0.5 - 0.9 14.7-113 4.2 - 8.5 .3 - .9 0-463 52.3 - 1270 55 -483 10.1-43.5 Cs-134 0 - .4 2.1 - 3.9 10.1 - 64.4 2-4.7 2.3 - 6.8 3.2 - 43.5 30.3 - 56.7 42.4- 73.8 9.9 - 34.2 Cs-137 0 - .4 2.2 - 4.4 1.1-61.8 2.2 - 4.8 2.7 - 7.4 8.2- 61.1 34.6 - 53.8 36.6 - 73.7 10.9 - 37.1 Ba-140 0- 2.6 5.3 - 10.4 0 - 2304 4.7 - 8.9 1.6 - 9.4 0 - 151.4 56.1 - 440 63.1 - 216 11.1 - 53.7 La-140 0- 2.6 5.1 - 10.3 0 - 2304 4.7 - 8.9 1.6 - 9.4 0 - 151 56.1-440 63.1 - 216 11.1 - 53.7 Ce-144 0 - 1.2 11.2 - 20.9 0-226 12.1 - 23.1 14.3 - 31.9 0 - 166 130 - 217 136-301 28.4 - 159 1 3 2 This MDA range for I-131 on a charcoal cartridge is typically 4.00 x 10* to 5.70 x 10*

51

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table B-11 Typical LLDs for Gamma Spectrometry Bay Water, Air Soil pCi/kg Vegetation Selected Surface Water, Fish pCi/kg Ground water Oysters pCi/kg Precipitation Particulates pCi/kg (wet)

Nuclides Drinking Water (wet) pCi/L (wet) pCi/L (dry) 10*3 pCi/m 3 pCi/L Na-22 2.9 2.9 22 2.9 22 2.9 24 35 Cr-51 12 17 88 17 88 17 110 162 Mn-54 2.1 2.4 17 2.4 17 2.4 18 27 Co-58 2 2.4 16 2.4 16 2.4 17 25 Fe-59 4.6 5.2 37 5.2 37 5.2 38 60 Co-60 2.7 2.8 22 2.8 22 2.8 21 33 Zn-65 2.8 5.6 23 5.6 23 5.6 54 66 Nb-95 1.9 2.2 15 2.2 15 2.2 18 25 Zr-95 3.3 3.8 27 3.8 27 3.8 29 44 Ru-106 17 20 135 20 135 20 146 223 Ag-110m 1.8 2.1 14 2.1 14 2.1 16 25 Te-129m 20 26 149 26 149 26 180 265 1-131

• 1.5 2 11 2 11 2 14 20 Cs-134 1.9 2.2 15 2.2 15 2.2 20 24 Cs-137 1.8 2.3 15 2.3 15 2.3 17 27 Ba-140 6.1 7.3 48 7.3 48 7.3 54 80 La-140 3.4 4.1 26 4.1 26 4.1 25 41 Ce-144 5.5 12 43 12 43 12 75 101 3 3

• The LLD for I-131 measured on a charcoal cartridge is 2.0 x10* pCi/m 52

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table B-12 Direct Radiation (Results in Units of mR/90 days +/- 2cr)

Site Code Location First Quarter Second Quarter Third Quarter Fourth Quarter DR01 On Site, along Cliffs 13.36 +/- 0.62 12.83 +/- 1.97 13.48 +/- 1.95 13.64 +/- 0.53 DR02 Route 765, Auto Dump 11.89 +/- 0.75 11.28 +/- 0.81 11.14 +/- 1.03 11.30 +/- 1.06 DR03 Route 765, Giovanni's 11.35 +/- 0.81 11.18 +/- 1.29 10.84 +/- 0.61 11.00 +/- 0.88 Tavern DR04 Route 765, White Sands 13.00 +/- 1.92 12.34 +/- 0.54 12.62 +/- 0.91 12.65 +1-* 0.31 Drive DR05 Route 765, John's Creek 12.30 +/- 0.87 12.58 +/- 1.21 12.61 +/- 0.82 12.82 +/- 0.82 DR06 Route 765 at Lusby 10.87 +/- 1.24 10.77 +/- 1.29 10.69 +/- 1.15 10.52 +/- 1.16 DR07 Entrance to Camp Conoy 10.45 +/- 0.69 10.50 +/- 1.01 10.51 +/- 0.79 10.71 +/- 0.90 DR08 Camp Conoy Rd at 15.15 +/- 0.80 15.39 +/- 1.48 15.10 +/- 2.01 15.15 +/- 1. 78 Emergency Siren DR09 Bay Breeze Rd 11.09+/- 1.37 11.05 +/- 1.17 11.08 +/- 1.19 11.23 +/- 0.66 DR10 Calvert Beach Rd and 11.22 +/- 1.14 10.79 +/- 1.12 10.63 +/- 0.39 11.16 +/- 0.64 Decatur Street DR11 Dirt road off Mackall & 11.48 +/- 0.61 11.14+/-0.70 11.59 +/- 1.80 11.56 +/- 0.70 Parren Rd DR12 Mackall & Bowen Rds 11.22 +/- 0.45 10.96 +/- 0.83 11.30 +/- 0.83 11.18 +/- 0.51 DR13 Mackall Rd, near Wallville 12.27 +/- 0.67 12.99 +/- 1.39 12.44 +/- 1.34 12.93 +/- 1.28 DR14 Rodney Point 13.94 +/- 1.98 13.67 +/- 0.99 13.96 +/- 1.42 12.61 +/- 0.75 DR15 Mill Bridge & Turner Rds 12.35 +/- 0.64 11.61+/-1.09 12.20 +/- 1.06 12.22 +/- 1.37 53

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table B-12 Direct Radiation (Results in Units of mR/90 days +/- 2cr)

Site Code Location First Quarter Second Quarter Third Quarter Fourth Quarter DR16 Across from Appeal 12.54 +/- 0.62 10.63 +/- 0.93 11.14 +/- 1.29 11.00 +/- 0.97 School DR17 Cove Point & Little Cove 13.66 +/- 0.80 14.29 +/- 1.31 12.94 +/- 0.90 14.14 +/- 1. 77 Point Rds DR18 Cove Point 10.32 +/- 0.83 9.63 +/- 0.52 9.78 +/- 0.89 9.90 +/- 1.43 DR19 Long Beach 11.20 +/- 0.81 10.92 +/- 0.83 10.75 +/- 1.20 11.02 +/- 0.97 DR20 On site, near shore 13.90 +/- 0.90 13.47 +/- 1.51 13.88 +/- 0.80 13.94 +/- 0.98 1 12.23 +/- 1.47 12.51 +/- 0.51 12.81 +/- 1.34 12.62 +/- 0.40 DR21 EOF DR2i Solomons Island 11.83 +/- 1.36 11.24 +/- 0.98 11.48 +/- 0.49 12.08 +/- 0.86 DR23 1

Taylors Island 15:68 +/- 1.37 16.18 +/- 0.59 16.30 +/- 1.52 16.55 +/- 1.38 DR30 MET Station 11.97 +/- 0.79 11.92 +/- 0.77 12.25 +/- 0.66 12.36 +/- 0.85 SFDR01 SW of ISFSI 16.97 +/- 1.55 17.97+/- 1.56 17.17 +/- 1.22 17.36 +/- 1.69 SFDR02 NNW of ISFSI 19.47 +/- 1.35 18.87 +/- 1.75 19.56 +/- 1.99 19.72 +/- 1.85 SFDR03 North of ISFSI 38.05 +/- 4.66 38.67 +/- 7.94 38.28 +/- 8.35 45.87 +/- 7.44 SFDR04 NE of ISFSI 35.66 +/- 6.55 36.21 +/- 3.75 31.96 +/- 4.06 35.14 +/- 8.82 SFDR05 East of ISFSI 20.64 +/- 3.14 24.64 +/- 3.44 22.91 +/- 2.67 22.08 +/- 3.03 SFDR06 ESE of ISFSI 18.71 +/- 0.79 19.28 +/- 2.55 18.86 +/- 0.60 20.52 +/- 1.38 54

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table B-12 Direct Radiation (Results in Units of mR/90 days +/- 2cr)

Site Code Location First Quarter Second Quarter Third Quarter Fourth Quarter SFDROt Visitor's Center 13.05 +/- 0.37 13.44 +/- 1.90 12.34 +/- 0.63 12.70 +/- 0.75 SFDR08 NNW of ISFSI 28.30 +/- 4.90 26. 78 +/- 3.23 27.57 +/- 5.48 28.83 +/- 5.85 SFDR09 SSE of ISFSI 16.60 +/- 1.73 17.41 +/- 1.70 17.30 +/- 2.07 22.93 +/- 1.91 SFDR10 NW of ISFSI 34.62 +/- 3.08 25.02 +/- 3.95 33.47 +/- 4.17 34.26 +/- 6.80 SFDR11 WNWISFSI 26.47 +/- 3.26 23.78 +/- 1.48 30.42 +/- 3.02 25.05 +/- 3.49 SFDR12 WSWoflSFSI 45.00 +/- 12.49 42.40 +/- 6.81 39. 76 +/- 6.08 42.51 +/- 1.59 SFDR13 South of ISFSI 27 .24 +/- 6.46 26.26 +/- 6.93 22.24 +/- 2.61 31.06 +/- 6.93 SFDR14 SE of ISFSI 46.36 +/- 11. 72 28.59 +/- 3.69 36.89 +/- 18.32 34.08 +/- 3.60 SFDR15 ENE of ISFSI 24.74 +/- 5.04 23.22 +/- 5.10 22.81 +/- 5.23 27.43 +/- 8.33 SFDR16 SSW of ISFSI 41.76 +/- 5.01 37.51 +/- 5.76 42.67 +/- 5.35 39.81 +/- 6.89 SFDR17 NNE of ISFSI 45.82 +/- 9.38 42.90 +/- 5.35 42.57 +/- 5.78 43.89 +/- 9.23 SFDR18 West of ISFSI 44.85 +/- 5.63 41.09 +/- 6.51 46.29 +/- 5.43 43.81 +/- 4.07 1

ControlLocation 55

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 APPENDIXC Quality Assurance Program Appendix C is a summary of Exelon Industrial Services (EIS) Laboratory's quality assurance program. It consists of Table C-1 which is a compilation of the results of the EIS Laboratory's participation in an interlaboratory comparison program with Environmental Resource Associates (ERA) located in Arvada, Colorado and Analytics, Inc. located in Atlanta, Georgia. It also includes Table C-2, which is a compilation of the results of the EIS laboratory's participation in a split sample program with Teledyne Brown Engineering located in Knoxville, Tennessee, and Table C-3, which is a list of typical MD As achieved by Teledyne Brown for Gamma Spectroscopy.

All the EIS Laboratory's results contained in Table C-1 generally agree with the intercomparison laboratory's results within the range of +/-2 cr of each other. Results for ERA RAD 101 gamma emitters in water initially failed acceptable ranges. Upon investigation it was confirmed that an incorrect reference date had been used. When the correct reference date was used and data was reprocessed all results reported within acceptable ranges. This event has been entered into the Laboratory's Corrective Action Program and steps have been taken to prevent future occurrences. Results for Zinc and Cesium-134 in ERA RAD 103 were just outside the acceptable range but did pass the NRC Resolution Test Criteria. All other sets of intercomparison results in the table are also in full agreement when they were further evaluated using the NRC Resolution Test Criteria1. The uncertainties for the EIS Laboratory's results and Analytics' results are +/-2cr while the ERA laboratory's uncertainty is based on USEPA gut"del"mes 2 .

All the results contained in Table C-2 agree within the range of +/-2 cr of each other with their respective EIS Laboratory original, replicate and/or Teledyne Brown Engineering's split laboratory samples, except for the comparisons of two samples involving Cs-137 results: bottom sediment samples from WBS2 collected on 06/15/2015 and WBS4 also collected 06/15/2015. In the case ofWBS2 low levels of Cs-137 were observed in two of the results of the comparison set within +/-2 cr of each other and not observed in the split sample. The MDA of the split lab was within +/-2 cr of the original and replicate results. In the case ofWBS4 the original and replicate results agree within +/-2 cr of each other and the high uncertainty of the split lab result puts this value within range of the original and replicate results. These minor discrepancies, occurring very close to or below the analyses MD A's, are most probably due to counting statistical fluctuations and/or the non-homogeneous nature of the sample-splitting process. Other samples whose nature generally precludes sample splitting are marked"**" in the Split Analysis column.

1 NRC Inspection Manual, Inspection Procedure 84750, March 15, 1994 2

National Standards for Water Proficiency Testing Studies Criteria Document, December 1998 56

. January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 TABLE OF CONTENTS - ANALYTICAL RESULTS Table Title Page C-1 Results of Participation in Cross Check Programs .................................................................. 58 C-2 Results of Quality Assurance Program .................................................................................... 61 C-3 Teledyne Brown Engineering's Typical MDAs for Gamma Spectrometry ............................ 72 57

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table C-1 Results of Participation in Cross Check Programs Reported Sample Type and Cross Check Lab Sample Date Isotope Observed Laboratory's Units Results Results 01/05/15 Air Iodine - pCi 1-131 22.7 +/- 6.6 22.3 01/05/15 Water - pCi/L Cs-137 125 +/- 6.0 124 Ba-133 60.0 +/- 4.0 67.6 Cs-134 45.3 +/- 3.0 51.3 Zn-65 109 +/- 10.0 98.7 Co-60 64.1 +/- 4.0 62.4 03/19/15 Air Iodine - pCi . 1-131 66.0 +/- 5.0 77.8 +/- 2.6 03/19/15 Milk-pCi/L Cr-51 600 +/- 83.0 555 +/- 7.0 Ce-141 239 +/-17.0 211 +/- 7.0 Cs-137 266 +/- 19.0 253 +/- 8.4 1-131 102 +/- 14.0 97.5 +/- 3.3 Cs-134 184 +/- 12.0 191 +/- 6.4 Zn-65 543 +/- 43.0 453 +/- 15.1 Co-60 536 +/- 20.0 498 +/- 16.6 Co-58 286 +/- 19.0 272 +/- 9.1 Fe-59 338 +/- 26.0 295 +/- 9.9 Mn-54 276 +/- 20.0 240 +/- 8.0 03/19/15 Water - pCi/L Gross Beta 239 +/- 6.4 280 +/- 9.34 1

04/06/15 Water - pCi/L Co-60 86.3 +/- 5.0 84.5 1-131 24.2 +/- 5.0 23.8

.Ba-133 78.4 +/- 6.0 82.5 Cs-137 184. 7 +/- 5.0 189.0 Cs-134 66.0 +/- 5.0 75.7 Zn-65 216 +/- 5.0 203 58

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table C-1 Results of Participation in Cross Check Programs Reported Sample Type and Cross Check Lab Sample Date Isotope Observed Laboratory's Units Results Results 06/11/15 Air Filter - pCi Cr-51 238 +/- 27.0 231 +/- 7.7 Cs-134 121 +/- 3.0 136 +/- 4.6 Cs-137 109 +/- 5.0 105 +/- 3.5 Fe-59 145 +/- 7.0 127 +/- 4.2 Co-58 59.0 +/-4.0 57.2 +/- 1.9 Co-60 173 +/- 5.0 161 +/- 5.4 Zn-65 243 +/- 12.0 208 +/- 6.9 Mn-54 91.0 +/- 5.0 84.2 +/- 2.8 06/11/15 Water - pCi/L Cr-51 316 +/- 71.0 293 +/- 9.8 Cs-137 148 +/- 9.0 133 +/- 4.4 Cs-134 165 +/- 6.0 173 +/- 5.8 1-131 107 +/- 28.0 93.4 +/- 3.1 Zn-65 309 +/- 22.0 264 +/- 8.8 Co-60 228 +/- 9.0 205 +/- 6.8 Co-58 74.0 +/- 10.0 72.6 +/- 2.4 Mn-54 119 +/- 10.0 107 +/- 3.6 Fe-59 189 +/- 14.0 161 +/-5.4 3

09/11/15 Air Filter - pCi/m Gross Beta 108 +/- 2.0 98.3 +/- 3.28 09/21/15 Air Filter - pCi Zn-65 783 +/- 36.0 685 Cs-134 301 +/- 9.0 349 Cs-137 616 +/- 19.0 613 Co-60 527 +/- 14.0 521 Am-241 33.0 +/- 5.5 36.8 10/05/15 Water- pCi Zn-65 131+/-10.4 126 Cs-134 50.0 +/- 2.8 62.0 Cs-137 144 +/- 6.0 157 Ba-133 22.5 +/- 2.8 32.5 1-131 28.4 +/- 7.0 26.3 59

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table C-1 Results of Participation in Cross Check Programs Reported Sample Type and Cross Check Lab Sample Date Isotope Observed Laboratory's Units Results Results 12/03/15 Air Iodine - pCi 1-131 86.0 +/- 7.0 79.7 +/- 2.6 12/03/15 Air Filter - pCi Zn-65 189 +/- 23.0 173 +/- 5.8 Cs-137 80.0 +/- 9.0 80.0 +/- 2.6 Ce-141 94.0 +/- 7.0 89.8 +/- 3.0 Cr-51 204 +/- 39.0 196 +/- 6.6 Cs-134 98.0 +/- 7.0 112 +/- 3.8 Mn-54 112+/-10.0 101 +/- 3.4 Fe-59 85.0 +/- 12.0 75.1 +/- 2.6 Co-58 75.0 +/- 9.0 76.9 +/- 2.6 Co-60 157 +/- 10.0 149 +/- 5.0 12/03/15 Milk- pCi/L 1-131 108 +/- 18.0 91.2 +/- 3.0 Cs-134 156 +/-11.0 160 +/- 5.4 Cs-137 125 +/- 25.0 115 +/- 3.8 Ce-141 146 +/- 16.0 129 +/- 3.8 Mn-54 159 +/- 17.0 145 +/- 4.8 Zn-65 270 +/- 33.0 248 +/- 8.2 Co-60 231 +/- 15.0 213 +/- 7.2 Co-58 116+/-14.0 110 +/- 3.6 Fe-59 123 +/- 20.0 108 +/- 3.6 Cr-51 303 +/- 87.0 281 +/- 9.4 I See discussion at the beginning of the Appendix 60

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table C-2 Results of Quality Assurance Program Type of Original Replicate Sample Type and Location Sample Date Result Units Split Analysis Analysis Analysis Analysis 3 **

Air Iodine - A 1 01/19/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A2 01/19/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A3 01/19/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A4 01/19/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A5 01/19/15 1-131 pCi/m <MDA <MDA 3

Air Filter - A 1 02/02/15 Gamma pCi/m <MDA <MDA <MDA 3 **

Air Filter - A 1 02/02/15 Gross Beta pCi/m 1.6 +/- 0.1 1.5 +/- 0.1 Air Filter - A2 02/02/15 Gamma pCi/m 3 <MDA <MDA <MDA 3 **

Air Filter - A2 02/02/15 Gross Beta pCi/m 1.6 +/- 0.1 1.7 +/- 0.1 3

Air Filter - A3 02/02/15 Gamma pCi/m <MDA <MDA <MDA 3 **

Air Filter - A3 02/02/15 Gross Beta pCi/m 1.7 +/- 0.1 1.6 +/- 0.1 3

Air Filter - A4 02/02/15 Gamma pCi/m <MDA <MDA <MDA 3 **

Air Filter - A4 02/02/15 Gross Beta pCi/m 1.3 +/- 0.1 1.5+/-0.1 3

Air Filter - A5 02/02/15 Gamma pCi/m <MDA <MDA <MDA 3 **

Air Filter - A5 02/02/15 Gross Beta pCi/m 1.7 +/- 0.1 1.7+/-0.1 3

Air Filter - SFA1 02/02/15 Gamma pCi/m <MDA <MDA <MDA 3 **

Air Filter - SFA1 02/02/15 Gross Beta pCi/m 1.7 +/- 0.1 1.5 +/- 0.1 3

Air Filter - SFA2 02/02/15 Gamma pCi/m <MDA <MDA <MDA 3 **

Air Filter - SFA2 02/02/15 Gross Beta pCi/m 1.6 +/- 0.1 1.7+/-0.1 3

Air Filter - SFA3 02/02/15 Gamma pCi/m <MDA <MDA <MDA 3 **

Air Filter - SFA3 02/02/15 Gross Beta pCi/m 1.5 +/- 0.1 1.4 +/- 0.1 3

Air Filter - SFA4 02/02/15 Gamma pCi/m <MDA <MDA <MDA 61

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table C-2 Results of Quality Assurance Program Type of Original Replicate Sample Type and Location Sample Date Result Units Split Analysis Analysis Analysis Analysis Air Filter - SFA4 02/02/15 Gross Beta pCi/m 3 1.5 +/- 0.1 1.5 +/- 0.1 **

3 Air Filter - A 1 02/09/15 Gross Beta pCi/m 2.3 +/- 0.1 2.4 +/- 0.1 **

3 Air Filter - A2 02/09/15 Gross Beta pCi/m 2.4 +/- 0.1 2.4 +/- 0.1 **

3 Air Filter - A3 02/09/15 Gross Beta pCi/m 2.2 +/- 0.1 2.2 +/- 0.1 **

3 Air Filter - A4 02/09/15 Gross Beta pCi/m 2.3 +/- 0.1 2.1+/-0.1 **

3 Air Filter - A5 02/09/15 Gross Beta pCi/m 2.5 +/- 0.1 2.5 +/- 0.1 **

3 Air Filter - SFA1 02/09/15 Gross Beta pCi/m 2.2 +/- 0.1 2.2 +/- 0.1 **

3 Air Filter - SFA2 02/09/15 Gross Beta pCi/m 2.4 +/- 0.1 2.3 +/- 0.1 **

3 Air Filter - SFA3 02/09/15 Gross Beta pCi/m 2.0 +/- 0.1 2.0 +/- 0.1 **

3 Air Filter - SFA4 02/09/15 Gross Beta pCi/m 2.2 +/- 0.1 2.2 +/- 0.1 **

3 Air Iodine - A 1 02/09/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A2 02/09/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A3 02/09/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A4 02/09/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A5 02/09/15 1-131 pCi/m <MDA <MDA **

Bay Water- WA1 03/04/15 Gamma pCi/L <MDA <MDA <MDA Bay Water - WA2 03/04/15 Gamrna pCi/L <MDA <MDA <MDA 3

Air Filter - A1 03/09/15 Gross Beta pCi/m 2.3 +/- 0.1 2.4 +/- 0.1 **

3 Air Filter - A2 03/09/15 Gross Beta pCi/m 2.2 +/- 0.1 2.3 +/- 0.1 **

3 Air Filter - A3 03/09/15 Gross Beta pCi/m 2.2 +/- 0.1 2.2 +/- 0.1 **

3 Air Filter - A4 03/09/15 Gross Beta pCi/m 2.2 +/- 0.1 2.1 +/- 0.1 **

3 Air Filter - A5 03/09/15 Gross Beta pCi/m 2.3 +/- 0.1 2.3 +/- 0.1 **

62

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table C-2 Results of Quality Assurance Program Type of Original Replicate Sample Type and Location Sample Date Result Units Split Analysis Analysis Analysis Analysis 3

Air Filter- SFA1 03/09/15 Gross Beta pCi/m 2.3 +/- 0.1 2.2 +/- 0.1 **

3 Air Filter - SFA2 03/09/15 Gross Beta pCi/m 2.2 +/- 0.1 2.4 +/- 0.1 **

3 Air Filter - SFA3 03/09/15 Gross Beta pCi/m 2.2 +/- 0.1 2.2 +/- 0.1 **

3 Air Filter - SFA4 03/09/15 Gross Beta pCi/m 2.0 +/- 0.1 2.3 +/- 0.1 **

3 Air Iodine - A 1 03/09/15 1-131 pCi/m <MDA .<MDA **

3 Air Iodine - A2 03/09/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A3 03/09/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A4 03/09/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A5 03/09/15 1-131 pCi/m <MDA <MDA **

Shoreline sediment - WB1 03/31/15 Gamma pCi/kg <MDA <MDA <MDA 3

Air Filter - A 1 04/06/15 Gross Beta pCi/m 1.4 +/- 0.1 1.5 +/- 0.1 **

3 Air Filter - A2 04/06/15 Gross Beta pCi/m 1.6+/-0.1 1.6 +/- 0.1 **

3 Air Filter - A3 04/06/15 Gross Beta pCi/m 1.6 +/- 0.1 1.8 +/- 0.1 **

3 Air Filter - A4 04/06/15 Gross Beta pCi/m 1.6 +/- 0.1 1.5 +/- 0.1 **

3 Air Filter - A5 04/06/15 Gross Beta pCi/m 1.6 +/- 0.1 1.6 +/- 0.1 **

3 Air Filter- SFA1 04/06/15 Gross Beta pCi/m 1.5 +/- 0.1 1.5 +/- 0.1 **

3 Air Filter - SFA2 04/06/15 Gross Beta pCi/m 1.6 +/- 0.1 1.7 +/- 0.1 **

3 Air Filter - SFA3 04/06/15 Gross Beta pCi/m 1.5 +/- 0.1 1.3 +/- 0.1 **

3 Air Filter - SFA4 04/06/15 Gross Beta pCi/m 1.5 +/- 0.1 1.5 +/- 0.1 **

3 Air Iodine - A 1 04/06/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A2 04/06/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A3 04/06/15 1-131 pCi/m <MDA <MDA **

63

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table C-2 Results of Quality Assurance Program Type of Original Replicate Sample Type and Location Sample Date Result Units Split Analysis Analysis Analysis Analysis 3 **

Air Iodine - A4 04/06/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A5 04/06/15 1-131 pCi/m <MDA <MDA 3 **

Air Filter - A 1 05/04/15 Gross Beta pCi/m 1.1 +/- 0.1 1.2 +/- 0.1 3 **

Air Filter - A2 05/04/15 Gross Beta pCi/m 1.1 +/- 0.1 1.0 +/- 0.1 3 **

Air Filter - A3 05/04/15 Gross Beta pCi/m 1.1 +/- 0.1 1.1 +/- 0.1 3 **

Air Filter - A4 05/04/15 Gross Beta pCi/m 1.0 +/- 0.1 1.2 +/- 0.1 3 **

Air Filter - A5 05/04/15 Gross Beta pCi/m 1.0 +/- 0.1 1.0 +/- 0.1 3 **

Air Filter- SFA1 05/04/15 Gross Beta pCi/m 0.9 +/- 0.1 1.0 +/- 0.1 3 **

Air Filter - SFA2 05/04/15 Gross Beta pCi/m 1.1 +/- 0.1 1.1 +/- 0.1 3 **

Air Filter- SFA3 05/04/15 Gross Beta.: pCi/m 1.0 +/- 0.1 1.0 +/- 0.1 3 **

Air Filter - SFA4 05/04/15 Gross Beta pCi/m 1.0+/-0.1 1.0 +/- 0.1 3 **

Air Iodine - A 1 05/04/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A2 05/04/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A3 05/04/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A4 05/04/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A5 05/04/15 1-131 pCi/m <MDA <MDA 3 **

Air Filter - A 1 06/08/15 Gross Beta pCi/m 0.7 +/- 0.1 0.8 +/- 0.1 3 **

. Air Filter - A2 06/08/15 Gross Beta pCi/m 0.7+/-0.1 0.8 +/- 0.1 3 **

Air Filter - A3 06/08/15 Gross Beta pCi/m 0.8 +/- 0.1 0.8 +/- 0.1 3 **

Air Filter - A4 06/08/15 Gross Beta pCi/m 0.8 +/- 0.1 0.7 +/- 0.1 3 **

Air Filter - AS 06/08/15 Gross Beta pCi/m 0.9 +/- 0.1 0.8 +/- 0.1 3 **

Air Filter - SFA1 06/08/15 Gross Beta pCi/m 0.7 +/- 0.1 0.8 +/- 0.1 64

January 1 - December 31, 2015 Docket Nos. 50-317/50-318172-8 Table C-2 Results of Quality Assurance Program Type of Original Replicate Sample Type and Location Sample Date Result Units Split Analysis Analysis Analysis Analysis 3 **

Air Filter - SFA2 06/08/15 Gross Beta pCi/m 0.7+/-0.1 0.7 +/- 0.1 3 **

Air Filter - SFA3 06/08/15 Gross Beta pCi/m 0.8 +/- 0.1 0.7 +/- 0.1 3 **

Air Filter - SFA4 06/08/15 Gross Beta pCi/m 0.8 +/- 0.1 0.7 +/- 0.1 3 **

Air Iodine - A 1 06/08/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A2. 06/08/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A3 06/08/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A4 06/08/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A5 06/08/15 1-131 pCi/m <MDA <MDA Broccoli - IB2 06/15/15 Gamma pCi/kg <MDA <MDA <MDA Broccoli - IB5 06/15/15 Gamma pCi/kg <MDA <MDA <MDA Broccoli - IB8 06/15/15 Gamma pCi/kg <MDA <MDA <MDA Brussels sprouts - IB3 06/15/15 Gamma pCi/kg <MDA <MDA <MDA Brussels sprouts - IB6 06/15/15 Gamma pCi/kg <MDA <MDA <MDA Brussels sprouts - IB9 06/15/15 Gamma pCi/kg <MDA <MDA <MDA Cabbage - IB1 06/15/15 Gamma pCi/kg <MDA* <MDA <MDA Cabbage - IB4 06/15/15 Gamma pCi/kg <MDA <MDA <MDA Cabbage - IB7 06/15/15 Gamma pCi/kg <MDA <MDA <MDA 1 **

Bottom sediment - WBS2 06/16/15 Cs-137 pCi/kg 191 +/- 65.8 168 +/- 56.0 1

Bottom sediment - WBS4 06/16/15 Cs-137 pCi/kg 97.7 +/- 52.8 53.1 +/- 52.2 219 +/- 105 Oysters - IA3 06/16/15 Gamma pCi/kg <MDA <MDA <MDA Oysters - IA6 06/16/15 Gamma pCi/kg <MDA <MDA <MDA 3 **

Air Filter - A 1 07/06/15 Gross Beta pCi/m 1.7 +/- 0.1 1.7 +/- 0.1 65

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table C-2 Results of Quality Assurance Program Type of Original Replicate Sample Type and Location Sample Date Result Units Split Analysis Analysis , Analysis Analysis Air Filter - A2 07/06/15 Gross Beta pCi/m 3 1.7 +/- 0.1 1.6 +/- 0.1 **

3 Air Filter - A3 07/06/15 Gross Beta pCi/m 1.6 +/- 0.1 1.6 +/- 0.1 **

3 Air Filter - A4 07/06/15 Gross Beta pCi{m 1.7 +/- 0.1 1.7 +/- 0.1 **

3 Air Filter - A5 07/06/15 Gross Beta pCi/m 1.6 +/- 0.1 1.8 +/- 0.1 **

3 Air Filter - SFA 1 07/06/15 Gross Beta pCi/m 1.6 +/- 0.1 1.7 +/- 0.1 **

3 Air Filter - SFA2 07/06/15 Gross Beta pCi/m 1.6 +/- 0.1 1.8 +/- 0.1 **

3 Air Filter - SFA3 07/06/15 Gross Beta pCi/m 1.9 +/- 0.1 1.8 +/- 0.1 **

3 Air Filter - SFA4 07/06/15 Gross Beta pCi/m 1.7 +/- 0.1 1.7+/-0.1 **

3 Air Iodine - A 1 07/06/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A2 07/06/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A3 07/06/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A4 07/06/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A5 07/06/15 1-131 pCi/m <MDA <MDA **

3 Air Filter - A 1 08/03/15 Gamma pCi/m <MDA <MDA <MDA 3

Air Filter - A2 08/03/15 Gamma pCi/m <MDA <MDA <MDA 3

Air Filter - A3 08/03/15 Gamma pCi/m <MDA <MDA <MDA 3

Air Filter - A4 08/03/15 Gamma pCi/m <MDA <MDA <MDA 3

Air Filter - A5 08/03/15 Gamma pCi/m <MDA <MDA <MDA 3

Air Filter- SFA1 08/03/15 Gamma pCi/m <MDA <MDA <MDA 3

Air Filter - SFA2 08/03/15 Gamma pCi/m <MDA <MDA <MDA 3

Air Filter - SFA3 08/03/15 Gamma pCi/m <MDA <MDA <MDA 3

Air Filter- SFA4 08/03/15 Gamma pCi/m <MDA <MDA <MDA 66

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table C-2 Results of Quality Assurance Program Type of Original Replicate Sample Type and Location Sample Date Result Units Split Analysis Analysis Analysis Analysis 3

Air Filter - A 1 08/10/15 Gross Beta pCi/m 1.9 +/- 0.1 1.9+/-0.1 **

3 Air Filter - A2 08/10/15 Gross Beta pCi/m 1.9 +/- 0.1 1.9 +/- 0.1 **

3 Air Filter - A3 08/10/15 Gross Beta pCi/m 1.8 +/- 0.1 1.8 +/- 0.1 **

3 Air Filter - A4 08/10/15 Gross Beta pCi/m 1.9 +/- 0.1 2.0 +/- 0.1 **

3 Air Filter - AS 08/10/15 Gross Beta pCi/m 2.3 +/- 0.2 2.2 +/- 0.1 **'

3 Air Filter- SFA1 08/10/15 Gross Beta pCi/m 1.8 +/- 0.1 1.9 +/- 0.1 **

3 Air Filter - SFA2 08/10/15 Gross Beta pCi/m 1.9 +/- 0.1 1.8 +/- 0.1 **

3 Air Filter - SFA3 08/10/15 Gross Beta pCi/m 2.0 +/- 0.1 2.0 +/- 0.1 **

3 Air Filter- SFA4 08/10/15 Gross Beta pCi/m 1.8 +/- 0.1 1.8 +/- 0.1 **

3 Air Iodine - A 1 08/10/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A2 08/10/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A3 08/10/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A4 08/10/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - AS 08/10/15 1-131 pCi/m <MDA <MDA **

Bluefish - IA 1 08/18/15 Gamma pCi/kg <MDA <MDA <MDA Bluefish - IA4 08/18/15 Gamma pCi/kg <MDA <MDA <MDA Oysters - IA3 08/18/15 Gamma pCi/kg <MDA <MDA <MDA Oysters - IA6 08/18/15 Gamma pCi/kg <MDA <MDA <MDA 3

Air Filter - A 1 09/07/15 Gross Beta pCi/m 3.2 +/- 0.2 3.1 +/- 0.2 **

3 Air Filter - A2 09/07/15 Gross Beta pCi/m 3.3 +/- 0.2 3.1 +/- 0.2 **

3 Air Filter - A3 09/07/15 Gross Beta pCi/m 3.3 +/- 0.2 3.3 +/- 0.2 **

3 Air Filter - A4 09/07/15 Gross Beta pCi/m 3.2 +/- 0.2 3.1 +/- 0.2 **

67

January 1 - December 31, 2015 DocketNos. 50-317/50-318/72-8 Table C-2 Results of Quality Assurance Program Type of Original Replicate Sample Type and Location Sample Date Result Units Split Analysis Analysis Analysis Analysis Air Filter - A5 09/07/15 Gross Beta pCi/m 3 3.6 +/- 0.2 3.6 +/- 0.2 **

3 **

Air Filter - SFA1 09/07/15 Gross Beta pCi/m 3.3 +/- 0.2 3.1 +/- 0.2 3

Air Filter - SFA2 09/07/15 Gross Beta pCi/m 3.4 +/- 0.2 3.4 +/- 0.2 **

3 **

Air Filter - SFA3 09/07/15 Gross Beta pCi/m 3.5 +/- 0.2 3.4 +/- 0.2 3 **

Air Filter - SFA4 09/07/15 Gross Beta pCi/m 3.2 +/- 0.2 3.2 +/- 0.2 3 **

Air Iodine - A 1 09/07/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A2 09/07/15 1-131 pCi/m <MDA <MDA Air Iodine - A3 09/07/15 1-131 pCi/m 3 <MDA <MDA **

3 **

Air Iodine - A4 09/07/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A5 09/07/15 1-131 pCi/m <MDA <MDA Misc ground coverage -

SFB1 09/28/15 Gamma pCi/kg <MDA <MDA **

Misc ground coverage -

SFB3 09/28/15 Gamma pCi/kg <MDA <MDA **

3 **

Air Filter - A 1 10/05/15 Gros~ Beta pCi/m 0.7+/-0.1 0.7 +/- 0.1 3 **

Air Filter - A2 10/05/15 Gross Beta pCi/m 0.7 +/- 0.1 0.8 +/- 0.1 3 **

Air Filter - A3 10/05/15 Gross Beta pCi/m 0.8 +/- 0.1 0.8 +/- 0.1 3 **

Air Filter - A4 10/05/15 Gross Beta pCi/m 0.8 +/- 0.1 0.8 +/- 0.1 3 **

Air Filter - A5 1Q/05/15 Gross Beta pCi/m 0.8 +/- 0.1 0.9 +/- 0.1 3 **

Air Filter- SFA1 10/05/15 Gross Beta pCi/m 1.3 +/- 0.1 1.2 +/- 0.1 3 **

Air Filter - SFA2 10/05/15 Gross Beta pCi/m 0.8 +/- 0.1 0.9 +/- 0.1 Air Filter - SFA3 10/05/15 Gross Beta pCi/m 3 0.9 +/- 0.1 0.8 +/- 0.1 **

3 **

Air Filter - SFA4 10/05/15 Gross Beta pCi/m 0.8 +/- 0.1 0.9 +/- 0.1 68

January 1 - December 31, 2015 Docket Nos. 50-317/50-318172-8 Table C-2 Results of Quality Assurance Program Type of Original Replicate Sample Type and Location Sample Date Result Units Split Analysis Analysis Analysis Analysis Air Iodine - A 1 10/05/15 1-131 pCi/m 3 <MDA <MDA **

3 **

Air Iodine - A2 10/05/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A3 10/05/15 1-131 pCi/m <MDA <MDA 3 **

Air Iodine - A4 10/05/15 1-131 pCi/m <MDA <MDA 3 **

• Air Iodine - A5 10/05/15 1-131 pCi/m <MDA <MDA Oysters - IA3 10/21/15 Gamma pCi/kg <MDA <MDA <MDA Oysters - IA6 10/21/15 Gamma pCi/kg <MDA <MDA <MDA Misc ground coverage -

SFB2 10/27/15 Gamma pCi/kg <MDA <MDA **

Misc ground coverage -

SFB4 10/27/15 Gamma pCi/kg <MDA <MDA **

Soil - SFS2 10/27/15 Cs-137 pCi/kg 49.4 +/- 29.2 33.2 +/- 31.4 **

Bay Water-WA1 11/02/15 Gamma pCi/L <MDA <MDA <MDA Bay Water- WA2 11/02/15 Gamma pCi/L <MDA <MDA <MDA Air Filter - A 1 11/09/15 Gross Beta pCi/m 3

2.2 +/- 0.1 2.4 +t- 0.1 **

3 **

Air Filter - A2 11/09/15 Gross Beta pCi/m 2.0 +/- 0.1 2.2 +/- 0.1 3 **

Air Filter - A3 11/09/15 Gross Beta pCi/m 2.1+/-0.1 2.5 +/- 0.1 3 **

Air Filter - A4 11/09/15 Gross Beta pCi/m 2.1 +/- 0.1 2.3 +/- 0.1 3 **

Air Filter - A5 11/09/15 Gross Beta pCi/m 2.0 +/- 0.1 2.3 +/- 0.1 3 **

Air Filter - SFA1 11/09/15 Gross Beta pCi/m 2.5 +/- 0.1 2.6 +/- 0.1 3 **

Air Filter - SFA2 11/09/15 Gross Beta pCi/m 2.1 +/- 0.1 2.4 +/- 0.1 3 **

Air Filter - SFA3 11/09/15 Gross Beta pCi/m 1.9 +/- 0.1 2.0 +/- 0.1 3 **

Air Filter - SFA4 11/09/15 Gross Beta pCi/m 2.1+/-0.1 2.2 +/- 0.1 69

January 1 - December 31, 2015 DocketNos. 50-317/50-318/72-8 Table C-2 Results of Quality Assurance Program Type of Original Replicate Sample Type and Location Sample Date Result Units Split Analysis Analysis Analysis Analysis 3

Air Iodine - A 1 11/09/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A2 11/09/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A3 11/09/15 1-131 pCi/m <MDA <MDA **

Air Iodine - A4 11/09/15 1-131 pCi/m 3 <MDA <MDA **

3 Air Iodine - A5 11/09/15 1-131 pCi/m <MDA <MDA **

3 Air Filter - A1 12/07/15 Gross Beta pCi/m 3.9 +/- 0.2 3.9 +/- 0.2 **

3 Air Filter - A2 12/07/15 Gross Beta pCi/m 3.2 +/- 0.2 3.4 +/- 0.2 **

3 Air Filter - A3 12/07/15 Gross Beta pCi/m 3.2 +/- 0.2 3.2 +/- 0.2 **

3 Air Filter - A4 12/07/15 Gross Beta pCi/m 3.5 +/- 0.2 3.5 +/- 0.2 **

3 Air Filter - A5 12/07/15 Gross Beta pCi/m 3.4 +/- 0.2 3.6 +/- 0.2 **

3 Air Filter- SFA1 12/07/15 Gross Beta pCi/m 3.6 +/- 0.2 4.1 +/- 0.2 **

3 Air Filter - SFA2 12/07/15 Gross Beta pCi/m 3.2 +/- 0.2 3.5 +/- 0.2 **

3 Air Filter - SFA3 12/07/15 Gross Beta pCi/m 3.6 +/- 0.2 3.8 +/- 0.2 **

3 Air Filter - SFA4 12/07/15 Gross Beta pCi/m 3.3 +/- 0.2 3.6 +/- 0.2 **

3 Air Iodine - A 1 12/07/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A2 12/07/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A3 12/07/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A4 12/07/15 1-131 pCi/m <MDA <MDA **

3 Air Iodine - A5 12/07/15 1-131 pCi/m <MDA <MDA **

70

January 1 - December 31, 2015 Docket Nos. 50-317/50-318172-8 Table C-2 Results of Quality Assurance Program Type of Original Replicate Sample Type and Location Sample Date Result Units Split Analysis Analysis Analysis Analysis Gamma field - OROS 07/07/1S TLD mR/90 days 13.9 +/- 1.4 13.6 +/- 1.3 **

Gamma field - DR06 07/07/1S TLD mR/90 days 11.9 +/- 1.4 11.3 +/- 1.1 **

Gamma field - DR07 07/07/1S TLD mR/90 days 11.6 +/- 1.1 11.1 +/- 0.6 **

Gamma field - DR08 07/07/1S TLD mR/90 days 17.0 +/- 1.6 16.2 +/- 1.6 **

Gamma field - DR09 07/07/1S TLD mR/90 days 12.2 +/- 1.3 11.6 +/- 1.2 **

Gamma field - DR10 07/07/1 S TLD rriR/90 days 12.0 +/- 1.2 11.6+/-1.2 **

Gamma field - DR11 07/07/1S TLD mR/90 days 12.4 +/- 0.8 12.1 +/- 1.4 **

Gamma field - DR29 07/07/1S TLD mR/90 days 17.2 +/-1.S 1S.8 +/- 1.4 **

Gamma field - DR31 07/07/1S TLD mR/90 days 17.0 +/-1.6 16.1 +/- 2.0 ***

Gamma field - SFDR14 07/07/1S TLD mR/90 days 31.7 +/- 4.0 40.1+/-2.8 **

Gamma field - SFDR1 S 07/07/1S TLD mR/90 days 2S.7 +/- S.6 24.9 +/- 7.2 **

Gamma field - OROS 01/1S/16 TLD mR/90 days 13.2 +/- 0.8 13.0 +/- 1.4 **

Gamma field - DR06 01/1S/16 TLD mR/90 days 10.9 +/-1.2 11.2 +/- 0.9 **

Gamma field - DR07 01/1S/16 TLD mR/90 days 11.1 +/-0.9 11.0 +/- 1.0 **

Gamma field - DR08 01/1S/16 TLD mR/90 days 1S.7 +/- 1.8 1S.6 +/- 1.S **

Gamma field - DR09 01/1S/16 TLD mR/90 days 11.6+/-0.7 11.2 +/- 0.8 **

Gamma field - DR10 01/15/16 TLD mR/90 days 11.5 +/- 0.7 11.4 +/- 0.9 **

Gamma field - DR11 01/15/16 TLD mR/90 days 12.0 +/- 0.7 11.8 +/- 1.3 **

Gamma field - DR29 01/15/16 TLD mR/90 days 15.8 +/- 1.1 15.9 +/- 1.2 **

Gamma field - DR31 01/15/16 TLD mR/90 days 16.3 +/- 1.1 16.2 +/- 1.6 **

Gamma field - SFDR14 01/15/16 TLD mR/90 days 35.2 +/- 3.7 4S.0 +/- 3.0 **

Gamma field - SFDR15 01/15/16 TLD mR/90 days 28.4 +/- 8.6 29.7 +/- 7.8 **

1 See discussion at the beginning of the Appendix

• • The nature of these samples precluded splitting them with an independent laboratory.

71

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 TABLE C-3 Teledyne Brown Engineering's Typical MDAs for Gamma Spectrometry Selected Bay Water Fish Shellfish Sediment Vegetation Particulates Nu elides pCi/I pCi/kg pCi/kg pCi/kg pCi/kg 10-3pCi/m3 H-3 175 Na-22 1 8 3 12 6 5 Cr-51 12 105 4 104 50 63 Mn-54 1 9 3 12 5 4 Co-58 1 9 4 9 4 5 Fe-59 3 28 9 24 10 12 Co-60 1 9 4 12 5 6 Zn-65 2 20 8 25 10 9 Nb-95 1 12 7 14 6 9 Zr-95 2 18 8 20 9 9 Ru-106 9 75 30 90 41 40 Ag-110m 1 10 10 10 5 4 Te-129m 16 131 60 162 79 95 1-131 4 65 30 35 22 74 Cs-134 1 8 4 10 5 4 Cs-137 1 9 4 10 5 4 Bala-140 3 32 15 25 14 36 Ce-144 7 40 16 54 26 18 72

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 APPENDIXD Land Use Survey Appendix D contains the results of a Land Use Survey conducted around Calvert Cliffs Nuclear Power Plant during this operating period. A table listing the raw data of this survey and a discussion of the results are included in this appendix.

TableD-1 Discussion Land Use Survey A Land Use Survey was conducted to identify, Distance From Plant within a distance of 5 miles, the location of the (miles) nearest milk animal, the nearest residence, and Sector Residence Garden the nearest garden greater than 50 m2 in each of SE 1.5 1.5 the nine sectors over land. A detailed description SSE 1.6 4.2 of the Land Use Survey is given in a separate s 1.6 1.6 document (Ref. 9). The position of the nearest SSW 1.5 1.6 residence and garden in each sector out to 5 miles SW 1.1 1.1 is given in the adjacent table. There are no WSW 1.3 1.4 animals producing milk for human consumption w 1.3 1.6 within the 5 mile radius. The nearest garden WNW 2.7 2.7 location has changed in the Sand SSE sectors NW 2.0 2.2 since 2014 and are still located within the 5-mile radius.

The closest residence is situated in the SW sector and the nearest garden is also in the SW sector, which is one of the least prevalent wind directions. In the S, SSE, and SE sectors, there is the highest probability of wind blowing from the direction of the plant. The two gardens used' for vegetable samples by the REMP have been placed in the sectors with the highest X/Q. One sampling garden is located in the S sector at a distance of 0.4 miles, and another is situated near the site boundary in the SSE sector at a distance of 1.6 miles from the plant. These two sampling sites are considered good indicator locations for radioactive depositions around the plant.

The dose assessment using this operating period meteorological data was performed, and no significant impact from the plant was found.

73

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 APPENDIXE Additional Samples and Analysis Results Appendix Eis a presentation of the analytical results for additional samples collected in the environs of CCNPP. These extra samples are not required by the ODCM (Ref. 6). Table E-1 lists the locations of all the additional samples and the remaining tables in this appendix provide the results. Some of these samples were collected and analyzed to maintain the historical continuity for samples and sampling pathways discontinued when the Environmental Technical Specifications were changed in March, 1985. Additionally, Table E-1 includes the PICs which were phased out in 2011. Dose is instead measured at these locations by TLDs. The TLDs are a more reliable method of measuring dose and the PICS were redundant.

Table E-4 through E-10 contain analytical results for samples taken from the various radiological pathways (i.e., aquatic, atmospheric, terrestrial, and direct radiation) surrounding the plant. In general these results continue the historical trends previously observed in the official sites of the CCNPP REMP and ISFSI.

Table E-10 shows the direct radiation readings from TLDs placed at the perimeter of the Resin Storage Area which is a temporary waste resin storage and cask transfer area located to the west of the ISFSI facility. The TLD values are somewhat higher than those in the REMP program due to their proximity to this source of the radiation. However, when the direct radiation readings for the Resin Storage Area are compared with those from the ISFSI and Site Boundary TLDs, it is apparent that temporary storage of spent resin and cask transfers are having no significant, measurable effect on the environs surrounding CCNPP.

The NEI Industry Groundwater Protection Initiative was established to determine the potential impact nuclear power plants may have on the surrounding environment due to unplanned releases of radioactive liquids. Under the Groundwater Protection Initiative, groundwater monitoring is accomplished through routine sampling of the water table around the plant and analysis for gamma and tritium.

Groundwater samples were collected from 17 on-site piezometer tubes and one subsurface man hole in 2015. These were identified as Piezometers 11-30 and MH24 on Figure E-1, Site Map Groundwater Monitoring Wells. A piezometer tube is a shallow monitoring well which allows access to groundwater at a depth of approximately 40 feet beneath the site. Of the piezometer tubes sampled, # 11 indicated tritium in all four quarterly samples from 2015. Tritium at this location was previously identified and evaluated in December of 2005. The tritium originated from normal radiological waste discharges and was previously reported in the CCNPP Annual Radioactive Effluent Release Reports. The contamination is contained on site. No drinking water has been affected; the groundwater at this location does not impact any drinking water pathway. Two additional samples, collected in the third quarter 2015 at piezometer #19 and at Manhole #24, had positive tritium results. The results were 147 pCi/l at #19 and 151 pCi/l at Manhole #24. These results are well below the investigation level required by station procedures (2000 pCi/l) and tritium was not identified in samples from these locations in the following quarter.

The 2015 analysis results for tritium are shown in Table E-11, and analysis results for gamma emitting radionuclides are shown in Table E-12.

74

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 TABLE OF CONTENTS - ANALYTICAL RESULTS Table Title Page E-1 Locations of Non-Tech Spec Environmental Sampling Stations for Calvert Cliffs Nuclear Power Plant .............................................................................................................................. 76 E-2 Synopsis of2015 Calvert Cliffs Nuclear Power Plant Non-Tech Spec Radiological Environmental Monitoring Program ........................................................................................ 77 E-3 Annual Summary for Calvert Cliffs Nuclear Power Plant Units 1 & 2 Non-Tech Spec Radiological Environmental Monitoring Program .................................................................. 78 E-4 Concentration of Gamma Emitters in Bottom Sediment.. ....................................................... 79 E-5 Concentration oflodine-131 in Filtered Air ............................................................................ 80 E-6 Concentration of Beta Emitters in Air Particulates .................................................................. 82 E-7 Concentration of Gamma Emitters in Air Particulates ............................................................ 84 E-8 Concentration of Tritium and Gamma Emitters in Taylorslsland Well Water.. ...................... 85 E-9 Direct Radiation ....................................................................................................................... 86 E-10

• Direct Radiation from Resin Storage Area .............................................................................. 87 E-11 Concentration of Tritium in Groundwater ............................................................................... 88 E-12 Gross Concentration of Gamma Emitters in Groundwater. ..................................................... 89 Figure Title Page E-1 Site Map Groundwater Monitoring Wells ***************************************'***************************************90 75

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 TABLE E-1 Locations of Non-Tech Spec Environmental Sampling Stations for Calvert Cliffs Nuclear Power Plant Station Description Distance 1 Direction 1 (KM) (Miles (Sector)

A6 Long Beach 4.4 2.7 NW A7 Taylors Island Anderson's Property 12.6 7.8 ENE A8 Cambridge U of MD Estuarine Center 32.0 19.9 NE DR24 Route 4 and Parran Road 3.0 1.9 SW DR25 Camp Conoy Guard House 1.0 0.6 s DR26 Route 235 & Clarks Landing Rd. 20.5 12.7 SW DR27 Route 231 & Route 4 23.0 14.3 NW DR28 Tavlors Island Emergencv Siren #35 12.3 7.6 ENE DR29 Tavlors Island Emernencv Siren #38 12.5 7.8 E DR31 Cambridge U of MD Estuarine Center 32.0 19.9 NE DR32 Twining Property, Taylors Island 12.3 7.6 NE DR33 P.A. Ransome Property Taylors Island 14.8 9.2 ESE DR34 Shoreline at Barge Road 0.2 0.1 NE OSGDRl North of Old Steam Generator Storage Facility 0.3 0.2 SW OSGDR2 West of Old Steam Generator Storage Facility 0.3 0.2 SW PIClL Taylors Island Anderson's Property 12.6 7.8 ENE PIC2L On Site before Entrance to Camp Conoy 0.7 0.4 s PIC3L Meteorological Station 0.8 0.5 WSW PIC4L NNW of ISFSI 0.6 0.4 SW PICSL SSE of ISFSI 0.6 0.4 SSW PIC8L CCNPP Visitor's Center 0.3 0.2 NW RP DRS Resin Storage Area - North Fence Lower 0.7 0.4 SW RPDR6 Resin Storage Area - North Fence Uooer 0.7 0.4 SW RPDR7 Resin Storage Area - West Fence Right 0.7 0.4 SW RPDR8 Resin Storage Area - West Fence Left 0.7 0.4 SW RPDR9 Resin Storage Area - South Fence Upper 0.7 0.4 SW RPDR10 Resin Storage Area - South Fence Lower 0.7 0.4 SW RPDR11 Resin Storage Area - East Fence Left 0.7 0.4 SW RPDR12 Resin Storage Area - East Fence Right 0.7 0.4 SW WBS2 Discharge Area 0.3 0.2 N WBS4 Camp Conoy/Rocky Point 3.0 1.9 SE WWl Taylors Island Anderson's Property 12.6 7.8 ENE 1

Distance and direction from the central point between the two containment buildings.

2 No longer in use. Refer to Appendix E Summary.

76

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table E-2 Synopsis of 2015 Calvert Cliffs Nuclear Power Plant Non-Tech Spec Radiological Environmental Monitoring Program Sample Type Sampling Number of Number Analysis Analysis Number 1 1 Frequency Locations Collected Frequency Analyzed Aquatic Environment Bottom Sediment Q 2 4 Gamma Q 4 Atmospheric Environment Air lodine 2

w 7 358 1-131 W, 358 Air Particulates 3

w 3 150 Gross Beta w 150 Gamma MC 36 .

Direct Radiation Ambient Radiation Q 20 480 TLD Q 480 Terrestrial Environment Groundwater M 1 12 Gamma M 12 H3 M 12 1

W=weekly, M=monthly, Q=quarterly, SA=semiannual, A=annual, C=composite 2

The collection device contains Charcoal 3

Beta counting is performed after >72 hour decay, Gamma spectroscopy performed on monthly composites of weekly samples 77

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table E-3 Annual Summary for Calvert Cliffs Nuclear Power Plant Units 1 & 2 Non-Tech Spec Radiological Environmental Monitoring Program Medium or Type and Total Lower Limit of Indicator Location with Highest Annual Control Locations 1

Pathway Sampled Number of Detection (LLD) Locations Mean Highest Annual Mean (F) I Range Mean (F)/Range 1

(Unit of Analyses (F)/Range Mean Measurement) Performed Name/Distance &

2 Direction Aquatic Environment Bottom Sediment Gamma (4) 17 191 (1/2) Discharge Area 191 (1/2) 125 (2/2)

(pCi/kg) Cs-137 (191) WBS2 (191) (98-153) 0.3 km N Atmospheric Environment Air Particulates Gross Beta (156) 0.5 2. 1 (99/104) Cambridge CA 2.1 (51/52) 1.9 (51/52) 2 3 (10" pCi/m ) (0.7-4.9) 32.0 km NE (0.8-4.2) (0.7-4.7)

Direct Radiation Ambient Radiation TLD (480) 21.15 (480/480) East Fence Left 69.51 (24/24)

(mR/90 days) (9.45-75.99) RPDR11 (58.91-75.99) km 1

Mean and range based upon detectable measurements only. Fraction (F) of detectable measurements at specified location is indicated in parentheses.

2 Distance and direction from the central point between the two containment buildings.

78

January 1 - December 31, 2015 DocketNos. 50-317/50-318/72-8 Table E-4 Concentration of Gamma Emitters in Bottom Sediment (Results in units of pCi/kg (dry)+/- 20')

Sample Code Sample Date Cs-137 Gamma Emitters WBS2 Discharge Area . 6/16/2015 191 +/- 66

• 10/21/2015

• WBS4 1 Camp Conoy/ Rocky Point 6/16/2015 98 +/- 53

• 10/21/2015 153 +/- 46

• 1 Control Location

• All Non-Natural Gamma Emitters <MDA 79

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table E-5 Concentration of Iodine-131 in Filtered Air (Results in units of 10-3 pCi/m3 +/- 2cr) 1 1 Start Date Stop Date CA LB SFA1 SFA2 SFA3 SFA4 Tl Cambridge LONG BEACH MET Station Visitors Center NNWoflSFSI SSE of TAYLOR'S ISFSI ISLAND 12/29/2014 1/5/2015 * * * * * *

• 2 1/5/2015 1/12/2015 * * * * *

• 2 1/12/2015 1/19/2015 * * * * *

• 2 1/19/2015 1/26/2015 * * * * *

• 2 1/26/2015 2/2/2015 * * * * *

• 3 2/2/2015 2/9/2015 * * * * *

• 2/9/2015 2/16/2015 * * * * * *

• 2/16/2015 2/23/2015 * * * * * *

• 2/23/2015 3/2/2015 * * * * * *

• 3/2/2015 3/9/2015 * * * * * *

• 3/9/2015 3/16/2015 * * * * * *

• 3/16/2015 3/23/2015 * * * * * *

• 3/23/2015 3/30/2015 * * * * * *

• 3/30/2015 4/6/2015 * * * * * *

• 4 4/6/2015 4/13/2015 * * * * *

• 4/13/2015 4/20/2015 * * * * * *

• 4/20/2015 4/27/2015 * * * * * *

• 4/27/2015 5/4/2015 * * * * * *

• 5/4/2015 5/11/2015 * * * * * *

• 5/11/2015 5/18/2015 * * * * * *

• 5/18/2015 5/25/2015 * * * * * *

• 5/25/2015 6/1/2015 * * * * * *

• 6/1/2015 6/8/2015 * * * * * *

• 6/8/2015 6/15/2015 * * * * * *

• 6/15/2015 6/22/2015 * * * * * *

• 6/22/2015 6/29/2015 * * * * * *

• 6/29/2015 7/6/2015 * * * * * *

• 7/6/2015 7/13/2015 * * * * * *

• 80

January 1 - December 31, 2015 Docket Nos. 50-317/50-318172-8 Table E-5 Concentration of Iodine-131 in Filtered Air (Results in units of 10-3 pCi/m3 +/- 2a) 1 1 Start Date Stop Date CA LB SFA1 SFA2 SFA3 SFA4 Tl Cambridge LONG BEACH MET Station Visitors Center NNWof ISFSI SSE of TAYLOR'S ISFSI ISLAND 7/13/2015 7/20/2015 * * * * * *

• 7/20/2015 7/27/2015 * * * * * *

• 7/27/2015 8/3/2015 * * * * * *

• 8/3/2015 8/10/2015 * * * * * *

• 8/10/2015 8/17/2015 * * * * * *

• 8/17/2015 8/24/2015 * * * * * *

• 8/24/2015 8/31/2015 * * * * * *

• 8/31/2015 9/7/2015 * * * * * *

• 9/7/2015 9/14/2015 * * * * * *

• 9/14/2015 9/21/2015 * * * * * *

• 9/21/2015 9/28/2015 * * * * * *

• 9/28/2015 10/5/2015 * * * * * *

• 10/5/2015 10/12/2015 * * * * * *

• 10/12/2015 10/19/2015 * * * * * *

• 10/19/2015 10/26/2015 * * * * * *

• 10/26/2015 11/2/2015 * * * * * *

• 11/2/2015 11/9/2015 * * * * * *

• 11/9/2015 11/16/2015 * * * * * *

• 11/16/2015 11/23/2015 * * * * * *

• 11/23/2015 11/30/2015 * * * * * *

• 11/30/2015 12/7/2015 * * * * * *

• 12/7/2015 12/14/2015 * * * * * *

• 12/14/2015 12/21/2015 * * * * * *

• 12/21/2015 12/28/2015 * * * * * *

• 1 Control Location 2

Sampler malfunction/low flow 3

NCR, Lost Sample 4

Power Outage

• <MDA 81

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table E-6 Concentration of Beta Emitters in Air Particulates (Results in units of 10-2 pCi/m3 +/- 2cr) 1 Start Date Stop Date CA LB Tl Cambridge LONG BEACH TAYLOR'S ISLAND 12/29/2014 1/5/2015 2.9 +/- 0.1 2.6 +/- 0.1 2.5 +/- 0.1 2

1/5/2015 1/12/2015 2.5 +/- 0.2 2.2 +/- 0.3 2

1/12/2015 1/19/2015 2.5 +/- 0.2 2.2 +/- 0.2 2

1/19/2015 1/26/2015 1.7 +/- 0.1 1.7+/-0.1 2

1/26/2015 2/2/2015 1.6 +/- 0.1 1.4 +/- 0.1 3

2/2/2015 2/9/2015 2.7 +/- 0.2 2.5 +/- 0.2 2/9/2015 2/16/2015 2.3 +/- 0.1 2.8 +/- 0.2 2.2 +/- 0.1 2/16/2015 2/23/2015 2.0 +/- 0.2 2.7 +/- 0.1 2.5 +/- 0.1 2/23/2015 3/2/2015 2.6 +/- 0.1 2.8 +/- 0.2 2.6 +/- 0.1 3/2/2015 3/9/2015 2.2 +/- 0.1 2.2 +/- 0.1 2.1 +/- 0.1 3/9/2015 3/16/2015 1.8 +/- 0.1 1.7 +/- 0.1 1.7 +/- 0.1 3/16/2015 3/23/2015 1.7 +/- 0.1 1.7+/-0.1 1.8 +/- 0.1 3/23/2015 3/30/2015 1.8 +/- 0.1 1.9 +/- 0.1 1.7+/-0.1 3/30/2015 4/6/2015 1.6 +/- 0.1 1.6 +/- 0.1 1.4 +/- 0.1 4

4/6/2015 4/13/2015 1.3 +/- 0.1 1.1 +/- 0.1 4/13/2015 4/20/2015 1.4 +/- 0.2 1.4 +/- 0.1 1.6 +/- 0.1 4/20/2015 4/27/2015 1.5 +/- 0.1 1.5 +/- 0.1 1.5 +/- 0.1 4/27/2015 5/4/2015 1.1 +/- 0.1 1.0 +/- 0.1 1.0 +/- 0.1 5/4/2015 5/11/2015 2.8 +/- 0.2 2.3 +/- 0.2 2.2 +/- 0.2 5/11/2015 5/18/2015 2.1 +/- 0.1 1.7 +/- 0.1 1.7 +/- 0.1 5/18/2015 5/25/2015 2.3 +/- 0.1 1.9 +/- 0.1 1.8 +/- 0.1 5/25/2015 6/1/2015 1.8 +/- 0.1 1.5 +/- 0.1 1.6 +/- 0.1 6/1/2015 6/8/2015 0.8 +/- 0.1 0.7 +/- 0.1 0.7 +/- 0.1 6/8/2015 6/15/2015 2.3 +/- 0.1 2.1 +/- 0.1 2.1+/-0.1 6/15/2015 6/22/2015 1.9 +/- 0.1 1.6 +/- 0.1 1.6 +/- 0.1 6/22/2015 6/29/2015 1.7 +/- 0.1 1.4 +/- 0.1 1.3 +/- 0.1 6/29/2015 7/6/2015 1.7 +/- 0.1 1.9 +/- 0.1 1.1 +/- 0.1 7/6/2015 7/13/2015 2.1 +/- 0.1 2.0 +/- 0.1 1.9 +/- 0.1 7/13/2015 7/20/2015 2.0 +/- 0.1 1.7 +/- 0.1 1.6 +/- 0.1 7/20/2015 7/27/2015 2.2 +/- 0.1 2.0 +/- 0.1 1.9 +/- 0.1 7/27/2015 8/3/2015 2.7 +/- 0.1 2.2 +/- 0.1 2.1 +/- 0.1 8/3/2015 8/10/2015 1.9 +/- 0.1 1.9 +/- 0.1 1.8 +/- 0.1 8/10/2015 8/17/2015 2.1 +/- 0.1 1.9 +/- 0.1 2.0 +/- 0.1 8/17/2015 8/24/2015 2.2 +/- 0.1 2.1 +/- 0.1 2.1 +/- 0.1 8/24/2015 8/31/2015 2.9 +/- 0.1 2.4 +/- 0.1 2.6 +/- 0.1 8/31/2015 9/7/2015 4.0 +/- 0.2 3.5 +/- 0.2 3.3 +/- 0.2 9/7/2015 9/14/2015 2.0 +/- 0.1 1.7 +/- 0.1 1.6 +/- 0.1 9/14/2015 9/21/2015 3.5 +/- 0.2 3.0 +/- 0.2 3.0 +/- 0.2 9/21/2015 9/28/2015 2.0 +/- 0.1 1.7 +/- 0.1 1.7+/-0.1 82

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table E-6 Concentration of Beta Emitters in Air Particulates (Results in units of 10-2 pCi/m3 +/- 2cr)

Start Date Stop Date CA LB Tl 1 Cambridge LONG BEACH TAYLOR'S ISLAND 9/28/2015 10/5/2015 0.9 +/- 0.1 0.9 +/- 0.1 0.9 +/- 0.1 10/5/2015 10/12/2015 2.1 +/-0.1 2.2 +/- 0.1 2.0 +/- 0.1 10/12/2015 10/19/2015 1.7 +/- 0.1 2.1 +/- 0.1 1.8 +/- 0.1 10/19/2015 10/26/2015 2.0 +/- 0.1 2.3 +/- 0.1 2.4 +/- 0.1 10/26/2015 11/2/2015 1.5 +/- 0.1 1.7+/-0.1 1.7 +/- 0.1 11/2/2015 11/9/2015 2.0 +/- 0.1 2.2 +/- 0.1 2.0 +/- 0.1 11/9/2015 11/16/2015 1.8 +/- 0.1 1.9 +/- 0.1 2.1 +/- 0.1 11/16/2015 11/23/2015 1.8 +/- 0.1 1.9 +/- 0.1 2.0 +/- 0.1 11/23/2015 11/30/2015 1.9 +/- 0.1 2.0 +/- 0.1 1.9 +/- 0.1 11/30/2015 12/7/2015 2.8 +/- 0.2 3.5 +/- 0.2 2.9 +/- 0.2 12/7/2015 12/14/2015 4.2 +/- 0.2 4.9 +/- 0.2 4.7 +/- 0.2 12/14/2015 12/21/2015 1.8 +/- 0.1 2.1 +/- 0.1 2.0 +/- 0.1 12/21/2015 12/28/2015 1.4 +/- 0.1 1.0 +/- 0.1 1.1 +/- 0.1 1

Control Location 2

Sampler malfunction/low flow 3

NCR, Lost Sample 4

Power outage 5

Sampler Malfunction; Loss of Data

• <MDA 83

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table E-7 Concentration of Gamma Emitters in Air Particulates (Results in units of 10-3 pCi/m3 +/- 2cr) 1 Sample Date CA LB Tl Cambridge LONG BEACH TAYLOR'S ISLAND 2/2/2015 * *

• 3/2/2015 * *

• 3/30/2015 * *

• 4/27/2015 * *

• 6/1/2015 * *

• 6/29/2015 * *

• 8/3/2015 * *

• 8/31/2015 * *

• 9/28/2015 * *

• 11/2/2015 * *

• 11/30/2015 * *

• 12/28/2015 * *

• 1 Control Location

• All Non-Natural Gamma Emitters <MDA 84

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table E-8 Concentration of Tritium and Gamma Emitters in Taylors Island Well Water (Results in units of pCi/L +/- 2cr)

Sample Date Gamma Emitters H3 1/20/2015 * <156 2/23/2015 * <156 3/17/2015 * <157 4/20/2015 * <181 5/26/2015 * <182 6/30/2015 * <178 7/27/2015 * <177 8/24/2015 * <178 9/21/2015 * <175 10/20/2015 * <111 11/10/2015 * <109 12/21/2015 * <110

• Non-Natural Gamma Emitters <MDA 85

January 1 - December 31, 2015 Docket Nos. 50-317/50-318172-8 Table E-9 Direct Radiation (Results in units of mR/90 days+/- 2cr)

Site Code Location First Quarter Second Quarter Third Quarter Fourth Quarter DR24 Rt. 4 and Parran Rd. 11.80 +/- 0.80 11.56 +/- 1.20 11.93 +/- 1.36 12.30 +/- 1.26 DR25 Camp Conoy Guard 13.02 +/- 1.15 12.93+/- 1.26 13.48 +/- 1.27 13.37 +/- 0. 79 House DR26 Rt. 235 and Clark's 11.25 +/- 0.35 11.00 +/- 1.26 11.12 +/- 0.96 11.24 +/- 1.00 Landing Road DR27 Rt. 231 and Rt. 4 12.15 +/- 1.01 11.99 +/- 0.92 11.85 +/- 1.20 12.46 +/- 1.09 DR28 Taylors Is. Siren #35 13.69 +/- 0.35 13.58 +/- 1.28 14.14 +/- 1.47 14.95 +/- 1.69 DR29 Taylors Is. Siren #38 14.80 +/- 1.72 15.56 +/- 1.43 14.22 +/- 1.15 15.28 +/- 1.05 DR31 Cambridge 15.49 +/- 1.57 15.05 +/- 0.63 15.75 +/- 0.67 15.81 +/- 1.09 DR32 Twining Property, 14.82 +/- *1.45 14.16 +/- 1.69 16.00 +/- 1.45 15.65 +/- 1.12 Taylors Island DR33 P. A. Ransome Property 15.42 +/- 0.24 15.40 +/- 1.18 16.01 +/- 1.98 16.99 +/- 0.75 DR34 Shoreline at Barge Rd. 9.75 +/- 1.33 9.59 +/- 0. 72 9.76 +/- 0.28 9.45 +/- 0.85 OSG1 North of Old Steam 18.52 +/- 1.24 18.17 +/- 1.50 18.40 +/- 0.57 18.69 +/- 0.71 Generator Storage Facility OSG2 West of Old Steam 15.88 +/- 2.52 15.71 +/- 1.90 15.64 +/- 2.14 16.76 +/- 2.87 Generator Storage Facility 86

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table E-10 Direct Radiation from Resin Storage Area (Results in units of mR/90 days +/- 2cr)

Site Code Location First Quarter Second Quarter Third Quarter Fourth Quarter RPDR05 North Fence Lower 32.44 +/- 3.05 30.66 +/- 3.15 29.58 +/- 1.96 31.82 +/- 2. 76 RPDR06 North Fence Upper 16.13 +/- 1.25 17.29 +/- 1.17 17.33 +/- 1.53 36.99 +/- 2.04 RPDR07 West Fence Right 25.40 +/- 1.51 27.39 +/- 1.32 18.77 +/- 0.87 24.74 +/- 1.02 West Fence Left 20.89 +/- 2.02 20.62 +/- 2.29 18.84 +/- 1.37 19.94 +/- 2.32 RPDR08 South Fence Upper 29.50 +/- 1. 78 29.52 +/- 1.85 27.11 +/- 2.20 27.12 +/- 1.34 RPDR09 South Fence Lower 40.91 +/- 5.60 42.33 +/- 6.22 39.42 +/- 3.91 39.05 +/- 6.53 RPDR10 East Fence Left 73.56 +/- 11.24 75.99 +/- 9.50 69.58 +/- 2.71 58.91 +/- 4.88 RPDR11 East Fence Right 19.45 +/- 1.92 18.85 +/- 1.42 18.76 +/- 2.21 20.84 +/- 1. 75 RPDR12 87

January 1 - December 31, 2015 Docket Nos. 50-317/50-318/72-8 Table E-11 Concentration of Tritium in Groundwater (Results in units of pCi/L +/- 2cr)

By Piezometer Tube Locations Sample 11 12 13 15 18 19 20 21 22 23 24 25 26 27 28 29 30 MH24 Date 02/25/2015 ND ND ND ND ND ND # # # ND ND ND ND ND ND ND ND ND 02/28/2015 ND # # # ND ND ND ND ND ND ND ND ND ND ND ND ND ND 03/02/2015 708+/-149 ND ND ND # # ND ND ND ND ND ND ND ND ND ND ND ND 03/24/2015 ND ND ND ND ND ND ND ND ND # # ND # # # # ND ND 03/25/2015 ND ND ND ND ND ND ND ND ND ND ND # ND ND ND ND # #

06/06/2015 ND ND # # # # # # # ND ND ND ND # ND ND ND #

06/20/2015 1370+/-xxx ND ND ND ND ND ND ND ND # ND ND # ND # ND ND ND 06/22/2015 ND ND ND ND ND ND ND ND ND ND # # ND ND ND # # ND 06/29/2015 ND # ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 07/25/2015 ND ND ND ND ND ND # # # ND ND ND ND ND ND. ND ND ND 08/22/2015 2100+/-224 # # # # # ND ND ND ND ND # ND ND ND ND ND ND 09/19/2015 ND ND ND ND ND ND ND ND ND # # # # # # # # ND 09/28/2015 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 151 +/-97 11/07/2015 ND ND ND # # ND ND ND ND ND ND ND ND ND ND ND ND ND 11/09/2015 ND ND ND ND ND 147+/-96 ND ND ND ND ND ND ND ND ND ND ND ND 11/15/2015 1570+/-222 # # ND ND ND # # # ND ND ND # # # ND ND ND 12/12/2015 ND ND ND ND ND ND ND ND ND ND # # ND ND ND # # #

12/31/2015 ND ND ND ND ND ND ND ND ND # ND ND ND ND ND ND ND ND

1. Tritium Less than minimum Detectable Activity(<MDA)

ND No Data - Quarterly sample obtained as required.

88

January 1 - December 31, 2015 Docket Nos. 50-317 /50-318/72-8 Table E-12 Gross Concentration of Gamma Emitters in Groundwater (Results in units of pCi/L +/- 2cr)

By Piezometer Tube Locations Sample 11 12 13 15 18 19 20 21 22 23 24 25 26 27 28 29 30 MH24 Date 02/25/2015 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 02/28/2015 ND * *

• ND ND ND ND ND ND ND ND ND ND ND ND ND ND 03/02/2015

• ND ND ND *

• ND ND ND ND ND ND ND ND ND ND ND ND 03/24/2015 ND ND ND ND ND ND ND ND ND ND *

• ND ND 03/25/2015 ND ND ND ND ND ND ND ND ND ND ND

• ND ND ND ND 06/06/2015 ND ND ND ND ND ND ND ND ND 06/20/2015 ND ND ND ND ND ND ND ND

• ND ND ND

• ND ND ND 06/22/2015 ND ND ND ND ND ND ND ND ND ND *

• ND ND ND *

• ND 06/29/2015 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 07/25/2015 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 08/22/2015 ND ND ND ND ND ND ND ND ND ND ND 09/19/2015 ND ND ND ND ND ND ND ND ND *

• ND 09/28/2015 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 11/07/2015 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 11/09/2015 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 11/15/2015 ND ND ND ND ND ND ND ND ND

. 12/12/2015 ND ND ND ND ND ND ND ND ND ND ND ND ND 12/31/2015 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND

• All Non-Natural Gamma Emitters <MDA ND No Data - Quarterly sample obtained as required.

89

January 1 - December 31 , 20 15 Docket Nos. 50-317 /50-318/72-8 Figure E-1 Site Map Groundwater Monitoring Wells

• +*

200 Explanation*

IB RGPP Monitoring Locations 90