Text

Independent Spent Fuel Storage Installation - Submittal of Annual Radiological Environmental Operating Report
	ML18136A551
Person / Time
Site:	Calvert Cliffs
Issue date:	05/14/2018
From:	Laura Smith; Exelon Generation Co
To:	; Document Control Desk, Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation
References
	Download: ML18136A551 (105)
	v • d • e

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.sm1th2@exeloncorp.com May 14, 2018 U. S. Nuclear Regulatory Commission ATTN : 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 contact me at (410) 495-5219 or Mr. Ed Schinner at (410) 495-5210.

Respectfully,

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~~~

Larry D. Smith rvM5S2~

Manager-Regulatory Assurance JJ (< ,e_

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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 cc: NRC Project Manager, Calvert Cliffs NRC Resident Inspector, Calvert Cliffs NRC Regional Administrator, Region I S. Gray, MD-DNR

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 Calvert Cliffs Nuclear Power Plant May 14, 2018

ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT FOR THE CALVERTCLIFFSNUCLEARPOWERPLANT UNITS 1AND2 AND THE INDEPENDENT SPENT FUEL STORAGE INSTALLATION January 1 - December 31 , 2017 A. M. Barnett R. V. Thnacik EXELON GENERATION, LLC MAY 2018

January 1 - December 31, 2017 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 ENVIRONMENT AL 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 ................ .... ....... ....................... ........ .... .... ........ ..... .............. ........ ................ .. ......... ....... ...... 5 11.C.l.b Aquatic Organisms ...... ..... .. ....... ......... ......... ....... ...... ...... ........ .................. ............................. .............. 5 11.C.1.c Shoreline Sediment ..................... ........ ... ............. ...... ... ........ ... ......................... ....... ......... ............ ........ 6 11.C.2 Atmospheric Environment ..... ............... ......... ... ........ ....... ....... ..... ..... .... ...... .. ........... .......... ...... .. ...... ..... 9 II.C.2.a Air Particulate Filters .. ....... ............ ........ ............. ............ ............. ... ...... ..... .......... .... .......................... 9 11.C.2.b Air Iodine .......... ... ............. ..... ........ ..... ...... .. .... ...... .. .. ........................ ....... ... ... ... .... .. .. ... .... ................... 9 11.C.3 Terrestrial Environment ................................... ...... ...... ...... ..... ....... .... .. ... .. ...... .... ......... ................... .. 11 11.C.3.a Vegetation ......... ..... ... ... ... ......... .... ... ...... ..... ............ ..... ..... ...... .. .... ...... .... ..... ..... .... ...... ... ..... .... ............ 11 11.C.4 Direct Radiation ........ ..... ............. ........... ..... ...... ... ..................... ... ..... .......... ............................. ............ 11 11.D. CONCLUSION ......... .. ..... .. .... .. .... ..... .. ............................................... .. ......... ..... .. ......... ..... .... ... ..... ............... 15 III. INDEPENDENT SPENT FUEL STORAGE INSTALLATION RADIOLOGICAL ENVIRONMENT AL MONITORING PROGRAM ... ............................ ... ... ............... 21 ill.A. INTRODUCTION ............ ... ............... ........ ............. ...... ...... .... ...... ... .. ....... ............................. ..... ..... .... ...... 21 ill.B. PROGRAM ................... ... .... ....... .. .............. ........... ........ ... ........... ..... ......... ...... .. ....................... .................. 21 III.B.1 Objectives ....... ...... .................. ...................... .. .... .. ................. ............................... ..... ...... ...... .............. 21 ill.B.2 Sample Collection .... .. ... ............ ...... ..... ... ................. ....... ........... .... .. .... .. ... ... ........ .................... ........... 22 ill.B.3 Data Interpretation .................... ..... ....... ....... .......... ......... ......... .... .... ....... .. ... ............ ... .... .................. 22 ill.B.4 Program Exceptions ................. .. ... ...... .................. ............ ................... ..... ........... .. ................. .... ...... . 22 m.c. RESULTS AND DISCUSSIONS ...... .... ............... ...... ............... ............. ..... .... ...... .. ................................... 22 m.C.1 Atmospheric Environment ............... ..... ............ ... .... ......................... .......... ... .. ...... ........ .......... ......... 22 ill.C.1.a Air Particulate Filters ......... ........... ................ ................. ....... .... ............ ..... ...... ...... ................ ........ 22 m.C.2 Terrestrial Environment ......... ... ......... ... ...... .............. .. ............... ...... ............ .... .. .... ........ ... ............... 23 ill.C.2.a Vegetation ......... ......... ........... ... .... ...... ....... ... .... ................ ............... ................ ............ ... ... .......... ..... 23 ill.C.2.b Soils ............... ... ... .......... .. ................. .......... .. ... ....... .... ....... ....... .. ................................................... ... 23 ill.C.3 Direct Radiation .................. ..... ...... ... ... ................ .. ... .... ..... .............. ................. ................ .......... ....... 24 ill.D. CONCLUSION ...... .. ................. ........... ................... .................... ...... ... ........ .... ........ ..... .. .... ..................... .... 24 IV. REFERENCES ... ..... ........... ........... .................................. ...... ....... ... .... .... .............................. 28 APPENDIX A Sample Locations for the REMP and the ISFSI ... ... ..... .... ..... ....................... .. 30 APPENDIX B Analysis Results for the REMP and the ISFSI .................. ...... ....................... 39 APPENDIX C Quality Assurance Program ............................. ... ..... .. ..... .... ....... ...................... 60 APPENDIX D Land Use Survey ........................... ..... ............ ....... ......... .... ....... ......................... 77 APPENDIX E Additional Samples and Analysis Results ................ .... ... ........ ........................ 78 APPENDIX F Errata for 2016 AREOR Report ... .............. ........................ ....... ...................... 98

January 1 - December 31 , 2017 Docket Nos. 50-317/50-318/72-8 LIST OF FIGURES Figure Title Page 1 Tritium in Chesapeake Bay Water ... .... ..... .. .... .... .. ........ ........ ..... ..... .. ..... .... ... .. .. ... ... .... ....... ..7 2 Silver-1 lOm and Potassium-40 in Chesapeake Bay Oysters ......... ...................... ........ ....... 8 3 Nuclear Fallout in the Calvert Cliffs Area ............... ... ...... ....... .. ... ..... .. ... .. .... .. ... .. .. ..... ....... 10 4-a Mean TLD Gamma Dose, Calvert Cliffs Nuclear Power Plant ...... ...... ..... .. ...................... 13 4-b 2017 Quarterly TLD Gamma Dose per Location, Calvert Cliffs Nuclear Power Plant .... 14 5 Atmospheric Dispersion Around CCNPP Average Relative Air Concentrations (X/Q) ... 17 6 Atmospheric Dispersion Around CCNPP Average Relative Ground Deposition (D/Q) .. 18 7 Mean TLD Gamma Dose, ISFSI .......... ............... ... ... .... .. .. ..... ...... .. .. .... .. ...... .. ...... .. ........... 25 A-1 Map of Southern Maryland and Chesapeake Bay Showing Location of Calvert Cliffs Nuclear Power Plant ...... ... ............ ...... .... ..... ............ ... ... .... ....... .. ....... ... ... .. ...... .... .. .... ...... ..33 A-2 Calvert Cliffs Nuclear Power Plant Sampling Locations, 0-2 Miles .... .. .... ... ... .. ... .. .. ....... .34 A-3 Calvert Cliffs Nuclear Power Plant Sampling Locations, 0-10 Miles .. .... ....... ..... ... ......... .35 A-4 Independent Spent Fuel Storage Installation Sampling Locations .. .. .... ..... ...................... .37 A-5 Enlarged Map of the Independent Spent Fuel Storage Installation Sampling Locations ..38 E-1 Site Map Groundwater Monitoring Wells ....... ... .......... .... .... ... ... .. ....... .................... .......... 96 E-2 Site Map Rainwater Monitoring Wells ...... ... .......... ..... ........ ....... .. ................. .................... 97 11

January 1 - December 31 , 2017 Docket Nos. 50-317/50-318/72-8 LIST OF TABLES Table Title Page 1 Synopsis of 2017 Calvert Cliffs Nuclear Power Plant Radiological Environmental Monitoring Program ......... ... ... ... ..... .......... ..... .......... ......... .......... .. ........ ............. ....... ..... ... .. 19 2 Annual Summary of Radioactivity in the Environs of the Calvert Cliffs Nuclear Power Plant Units 1 and 2 ...... .... .... .......... .......... ...... ......... ... ..... ........ .... ...... .. ..... .... .... ... ... ........... .. 20 3 Synopsis of 2017 Calvert Cliffs Nuclear Power Plant Independent Spent Fuel Storage Installation Radiological Environmental Monitoring Program ... .... .. .... .... ... .. .. ................. 26 4 Annual Summary of Radioactivity in the Environs of the Calvert Cliffs Nuclear Power Plant Independent Spent Fuel Storage Installation .................. ..... .... ..... .... ... .. .... ...... .. ....... 27 A-1 Locations of Environmental Sampling Stations for the Calvert Cliffs Nuclear Power Plant

............. .... .... .. ....... ... .... .... .. .. .......... ........ ...... .... ...... ........... ..... ... .... .. .... ... ..... ... ..... ... ........ ... ..32 A-2 Locations of Environmental Sampling Stations for the Independent Spent Fuel Storage Installation at Calvert Cliffs ... ... ...... ... ................................. ........ .... ...... .... ... ..... ....... .. ....... 36 B-1 Concentration of Tritium and Gamma Emitters in Bay Water .... ... ....... ... ..... ...... .. ... ... ..... .41 B-2 Concentration of Gamma Emitters in the Flesh of Edible Fish ... .. ........ .......... ................. .42 B-3 Concentration of Gamma Emitters in Oyster Samples ... ....... ........ .. ............ .... .... ..............43 B-4 Concentration of Gamma Emitters in Shoreline Sediment.. .. ........ .............. .................... ..44 B-5 Concentration oflodine-131 in Filtered Air .. ... ........ .. ..... ........ .. .... .... .......... ... ............. ......45 B-6 Concentration of Beta Emitters in Air Particulates ....... ..... .............. .. .............. .... .. ....... .....47 B-7 Concentration of Gamma Emitters in Air Particulates ....... ..... ..... ..... ... ............ ...... .... .......51 B-8a Concentration of Gamma Emitters in Vegetation Samples ....... ... ... ...... .. .. .. ....... .... ...........52 B-8b Concentration of Gamma Emitters in Vegetation From Locations Around the ISFSI.. .... 53 B-9 Concentration of Gamma Emitters in Soil Samples From Locations Around the ISFSI .. 54 B-10 Typical MDA Ranges for Gamma Spectrometry ..... ............. .... .. ... ..... ...... ........................ 55 B-11 Typical LLDs for Gamma Spectrometry ... .... ................. ... .... .... .. .. ..... ...............................56 B-12 Direct Radiation ......... ...... .................. ............ ... ... ...... .... ......... ....... ... .... .. ... ....... ......... .... .... 57 C-1 Results of Participation in Cross Check Programs ............................ ....... ..... ..... .. ............. 62 C-2 Results of Quality Assurance Program ...... .... .... ..... .... ......... ....... .... .. .... .... ... .. ...... .. ... .... ..... 66 C-3 Teledyne Brown Engineering's Typical MDAs for Gamma Spectrometry ..... ... ........ ...... 76 E-1 Locations of Non-Tech Spec Environmental Sampling Stations for Calvert Cliffs Nuclear Power Plant .. ........ .... ... ............ ................. .................... ...... .. .... ..... .. .. ...... .... ...... .. ...............80 E-2 Synopsis of 2017 Calvert Cliffs Nuclear Power Plant Non-Tech Spec Radiological Environmental Monitoring Program .... ........................... .......... ... ....... ....... .. .... ............. .....81 E-3 Annual Summary for Calvert Cliffs Nuclear Power Plant Units 1 & 2 Non-Tech Spec Radiological Environmental Monitoring Program .. ........ .......... ..... .. ..... .... ......... ... ... .. .. .. ... 82 E-4 Concentration of Gamma Emitters in Bottom Sediment ... ............. .... .. .. ............... ............ 83 E-5 Concentration oflodine-131 in Filtered Air .. .. ... ...... .. .. ......... ... ... ... ...... .. ...... ..................... 84 E-6 Concentration of Beta Emitters in Air Particulates .... ............ .... ......... ... ... .... .. .......... .. ..... .. 86 E-7 Concentration of Gamma Emitters in Air Particulates ........ ............... ...... ... ........... ........... 88 E-8 Concentration of Tritium and Gamma Emitters in Taylors Island Well Water.. .......... .....89 Ill

January 1 - December 31, 2017 Docket Nos. 50-317/50-318/72-8 E-9 Direct Radiation ........... .. .................................................................................................... 90 E-10 Direct Radiation from Resin Storage Area ......... ............... ........ ........................ ....... ......... 91 E-11 Concentration of Tritium in Groundwater ... ......... .......................... .......... ......................... 92 E-12 Gross Concentration of Gamma Emitters in Groundwater. ................. ......... ..................... 94 iv

January 1 - December 31, 2017 Docket Nos. 50-317/50-318/72-8 I.

SUMMARY

During 2017, Calvert Cliffs Nuclear Power Plant (CCNPP) Units 1 and 2, a total of 3429 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 546 thermo luminescent 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, 359 radiochemical analyses were performed on 299 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, 678 analyses were performed on 609 additional environmental samples, and 480 additional TLDs were analyzed for ambient radiation exposure rates.

And lastly, 189 radiochemical analyses were performed on 189 quality assurance samples and 126 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 , 2017 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 I-131.

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

Natural radioactivity was detected in essentially all 3429 radiological analyses performed. Low levels of man-made fission products were also observed in 9 of these analyses for the CCNPP REMP. All of these observations were within the expected range and attributed to fallout from past atmospheric weapons testing (Ref.16). 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 2017 data from the plant's effluent releases, 2017 on-site meteorological data, and appropriate pathways. Carbon 14 dose is not included here and is instead reported in the Annual Radiological Effluents Release Report. The results of these dose calculations indicate:

a. a maximum thyroid dose of 1.13 x 10-3 mrem via liquid and gaseous pathways, which is about 0.002% 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 gamma dose of 2.40 x 10-3 mrem via liquid and gaseous pathways, which is about 0.010% 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 5.30 x 10-4 mrem to the GI tract. This dose is about 0.002% of the allowable limit of 25 mrem/yr as specified in both 40CFR190 and 10CFR72.104.

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, 2017 Docket Nos. 50-317/50-318/72-8 II. CALVERT CLIFFS NUCLEAR POWER PLANT RADIOLOGICAL ENVIRONMENT AL 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 1, 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 of CCNPP Units 1 and 2.

II.B. PROGRAM II.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 , 2017 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. Positive results which include natural and manmade activity are those that are "greater than" the MDA with good precision and accuracy. Trending and detailed discussions for positive results are provided in section II.C in their respective sections by sample type, i.e.

aquatic, atmospheric, terrestrial.

11.B.4 Program Exceptions There was a of a loss of sample collection at WA2 between 6/23/17 and 6/27 /17. The sample compositor on the Unit 1 side of Outfall 001 was found knocked over on the morning of 6/27 /17.

The compositor was likely knocked over by a surge of water rising up through the metal grating over Outfall 001. These surges occur upon starting Circulating Water Pumps. There was no loss of sample collected up to that point. A new compositor was put in service on 6/27/17. Sufficient sample volume collected for the month. The compositors at WA2 were moved to a secure location that is out of the way of such surges. The compositors have also been tied to a rigid structure.

Vegetation samples were not collected in June. This is discussed further in section 11.C.3 .a 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) and Teledyne Brown Engineering (Ref. 15). 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.

4

January 1 - December 31 , 2017 Docket Nos. 50-317/50-318/72-8 Il.C.1.a Bay Water Continuously composited bay water samples are taken from two locations during the year.

These locations are the Intake Area (sample code WAI) and the Discharge Area (sample code W A2). The composite samples are collected monthly.

These samples were analyzed for tritium and gamma emitters. 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 activity in three ways. The first graph shows the amount of tritium released from the plant. The units used to describe these releases are Curies per quarter. It can be noted that tritium releases from the plant are fairly constant over the 40-year operation of the facil ity.

The second graph depicts the concentration of tritium at the plant discharge (WA2), and the third graph depicts the concentration at the intake (WA 1). The units for these graphs are in picocuries per Liter. A picocurie is equivalent to 0.00000000001 curies.

It can be noted that there is a change in the detection frequency of tritium at the intake starting in 1985. The 1985 Annual Radiological Effluent Operating Report states that there was a change in sampling methodology: the program shifted from monthly grab sampling to quarterly continuous composite sampling.

Monthly analyses of bay water samples from both locations for gamma emitters exhibited no detectable concentrations of any plant-related radionuclides.

Il.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 IA1 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).

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.

As seen in Figure 2, Ag-11 Om has not been detected in oysters for over ten years. Ag- 11 Om is produced in the reactor through neutron activation of elemental silver that is present in some components of the reactor system. These components include control rods, in-core instrumentation, reactor vessel head o-rings, and the nuclear fuel. Through corrosion and wear, activated Ag-11 Om particles become suspended in the reactor coolant, and subsequently enter the facility's liquid radwaste processing system.

5

January 1 - December 31 , 2017 Docket Nos. 50-317 /50-318/72-8 Over the years, CCNPP has significantly improved the chemistry control program of the reactor coolant system to reduce corrosion and wear. Additionally, CCNPP has made significant improvements to the liquid radwaste processing system. In 2005, CCNPP retired its reactor coolant waste evaporation system and installed an ultra-filtration system with additional ion-exchangers. In 2015, the ultra-filtration system was replaced by a new Advanced Liquid Processing System to capture suspended particles. These improvements have significantly reduced the amount of Ag-11 Om that appears in plant effluents. Ag-11 Om now only appears in plant effluents infrequently, and at extremely low concentrations.

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.

6

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January 1 - December 31, 2017 Docket Nos. 50-317/50-318/72-8 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 765 at Lusby (sample code A4), and at the Emergency Operations Facility (sample code A5).

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 3.4 x 10-2 pCi/m3 for the indicator locations and 0.8 x 10-2 to 3.5 x 10-2 pCi/m3 at the control location. The location with the highest overall mean of 2.0 x10-2 pCi/m 3 was A4, Route 765 at Lusby.

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.

Figure 3 depicts the historical trends of beta activity both natural and manmade including the impact of Sr-90 due to significant events such as weapons testing in the 1970's and early 1980's as well as the fallout resulting from the accident event at Chernobyl in 1986.

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 of I-131 .

Figure 3 depicts the historical trends ofradioiodine including the short-term impacts of weapons testing events and the more recent accident events at Chernobyl in 1986 and Fukushima Dai-Ichi in 2011.

9

January 1 - December 31 , 2017 Docket Nos. 50-317/50-31 8/72-8 FIGURE 3 Nuclear Fallout in the Calvert Cliffs Area SURFACE AIR VAPORS , LUSBY, MD (A4) 250 ATMOSPH ERIC FA LLOUT From Chernobyl

, 200

.§ g ATMOSP HERI C FALLOUT From

§ 150 Fu kushima Dai-lchi

~C Q) u 100 C

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¢ ~ 00 0 N ¢ ~ 00 0 N ¢ ~ 00 0 N ¢ ~ 00 0 N ¢ ~ 00 0

~ ~ ~ 00 00 00 00 00 m m m m m O O O O O rl rl rl rl rl N Calendar Year 1200 ATMOSPHERIC FALLOUT From Weapons Testing M 1000

--g E

C 8QQ 0

~... ATMOSPHERIC FALLOUT From c Weapons Testing

~ 600 C

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ATMOSPHERIC

-al 400 FALLOUT Ill From Chernobyl

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(!) 200 0 ~...~l.lfol~....~............~"'"".........~...................._...~llillliilfilljlill~--...----..

~ ~ m M m ~ ~ m M m ~ ~ m M m ~ ~ m M m ~ ~ m

~ ~ ~ oo oo oo oo oo m m m m m o o o o o M M M M M Calendar Year 10

January 1 - December 31, 2017 Docket Nos. 50-317/50-318/72-8 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 IB1, 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.

Samples of garden vegetation were not collected in June due to lack of sufficient growth to collect any samples. Untimely planting due to inclement weather, followed by low rainfall in June resulted in poor growing conditions. Samples could not be taken until July to ensure the plants could remain viable after culling.

Additionally, there was significant tree cover at the Bay Breeze and Camp Conoy garden locations. To enhance likelihood of successful planting at the gardens, trees were removed in November 2017 to improve sunlight exposure.

All samples showed detectable amounts of naturally occurring K-40 and Be-7. Cs137 consistent with historical data was identified at 80pCi/kg in one sample at Camp Conoy (sample code IB6) of tree leaves collected in lieu of a garden species. This observation is attributed to uptake of fallout from past atmospheric weapons testing commonly found in surface soils and vegetation.

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 Vera's Beach Club (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 DRl 7), Cove Point (sample code DR18), Long Beach (sample code DR19), and On Site Near Shore (sample code DR20). The 11

January 1 - December 31, 2017 Docket Nos. 50-317/50-318/72-8 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).

The mean 90-day ambient radiation measured at the indicator locations was 11.35 mR and ranged from 8.98 to 14.66 mR as reported in Table 2. The control locations showed a 90 day mean of 13.02 mR with ranges from 10.76 to 16.38 mR. The location with the highest overall mean of 15.20 was Taylors Island, Anderson' s Property (sample code DR23) which ranged from 13.94 to 16.38 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. The four-mile group has historically been lower than the on-site and control group; this is likely due to variability in background between the groups. 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.

12

January 1 - December 31 , 2017 Docket Nos. 50-317 /50-318/72-8 FIGURE 4-a Mean TLD Gamma Dose, Calvert Cliffs Nuclear Power Plant 6 -+-- 4 Miles (DRl0-18)

-- Control Locations (DR21-23)

..,._ On-Site (DRl, 7, 8, 20) 5 4

VI l'1l Cl O

M a:

E 3

2 1

Calendar Year 13

January 1 - December 31, 201 7 Docket Nos. 50-317/50-318/72-8 FIGURE 4-b 2017 Quarterly TLD Gamma Dose per Location, Calvert Cliffs Nuclear Power Plant 70.00 60.00 50.00

~ 40.00 E

Cl)

VI 0

C.

~ 30.00 20.00 10.00 0.00 DR18 DR06 DR07 DRlO DR09 DR16 DR02 DR19 DR03 DR12 DRll DR22 DR15 OROS DR13 DR04 DR14 DR21 DROl DR17 DR20 DR08 DR23 TLD Location a Ql a Q2 Q3 Q4 14

January 1 - December 31, 2017 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 2017 effluent release data, on site meteorological data (see X/Q and D/Q values presented in Figures 5 and 6), and appropriate pathways. Carbon 14 dose is not included here and is instead reported in the Annual Radiological Effluents Release Report. The results of these dose calculations indicate:

Gaseous Pathways A maximum thyroid dose of 2.58 x 10-4 mrem to a child via the plume, ground, vegetable, and inhalation pathways at 1.5 miles SE of the containments at Calvert Cliffs. This is about 0.0003%

of the acceptable limit of 75 mrem/yr as specified in 40CFR190 and 10CFR72.104.

A maximum whole body gamma dose of 2.63 x 10-4 mrem to a child at 1.5 miles SE of the containments at Calvert Cliffs. This is about 0.001 % of the acceptable dose limit of 25 mrem/yr as specified in 40CFR190 and 10CFR72.104.

A maximum dose to any other organ, in this case the GI Tract, of 2.60 x 10-4 mrem to a child at 1.5 miles SE of the containments at Calvert Cliffs. This is about 0.001 % of the acceptable dose limit of25 mrem/yr as specified in 40CFR190 and 10CFR72.104.

Liquid Pathways A maximum thyroid dose of 8.67 x 10-4 mrem to an adult for all liquid pathways, which is about 0.001 % of the acceptable dose limit of 75 mrem/yr as specified in 40CFR190 and 10CFR72.104.

A maximum whole body dose of 2.14 x 10-3 mrem to an adult via all liquid pathways, which is about 0.003 % of the acceptable dose limit of 25 mrem/yr as stated in 40CFR190 and 10CFR72.104.

A maximum dose to any other organ, in this case GI Tract, of 2. 70 x 10-4 mrem to a teen for all pathways, which is 0.001 % of the acceptable dose limit of 25 mrem/yr specified in 40CFR190 and 10CFR72.104.

15

January 1 - December 31, 2017 Docket Nos. 50-317/50-318/72-8 Gaseous and Liquid Pathways Combined A maximum thyroid dose of 1.13 x 10-3 rnrem via liquid and gaseous pathways, which is about 0.002% of the acceptable limit of 75 rnrem/yr as specified in 40CFR190 and 10CFR72.104.

A maximum whole body dose of 2.40 x 10-3 rnrem via liquid and gaseous pathways, which is about 0.010% of the acceptable limit of 25 rnrem/yr as specified in 40CFR190 and 10CFR72.104.

A maximum calculated dose to all other organs via liquid and gaseous pathways is equal to 5.30 x 10-4rnrem to the GI Tract. This dose was about 0.002% of the allowable limit of 25 rnrem/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 201 7.

16

January 1 - December 31 , 2017 Docket Nos. 50-317/50-318/72-8 FIGURE 5 Atmospheric Dispersion Around CCNPP Average Relative Air Concentrations (X/Q)

B- I I

or:~~-e,\J 0\1':'Yif _

I L~

\ ~

}

15000 17

January 1 - December 31, 2017 Docket Nos. 50-317/50-318/72-8 FIGURE6 Atmospheric Dispersion Around CCNPP Average Relative Ground Deposition (D/Q) 18

January 1 - December 31, 201 7 Docket Nos. 50-317 /50-318/72-8 Table 1 Synopsis of 2017 Calvert Cliffs Nuclear Power Plant Radiological Environmental Monitoring Program Sample Type Sampling Number of Number Analysis Analysis Number Frequency 1 Locations Collected Frequency 1 Analyzed Aquatic Environment Bay Water, Surface MC 2 24 Gamma MC 24 Water, Drinking Water H-3 QC 8 Fish 2 A 4 4 Gamma A 4 Oysters Q 2 8 Gamma Q 8 Shoreline Sediment SA 1 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 Vegetation 5 M 3 27 Gamma M 27 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 19

January 1 - December 31 , 201 7 Docket Nos. 50-317 /50-3 18/72-8 Table 2 Annual s._.mmary 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) / Range1 Mean (F)/Range (Unit of Analyses (F)/Range 1 Mean Measurement) Performed Name/Distance &

Direction 2 Atmospheric Environment Air Particulates Gross Beta (260) 0.5 1.9 (208/208) Route 765 at 2.0 (52/52) 2.0 (52 (10-2 pCi/m 3 ) (0.7-3.4) Lusby A4 (0.8-3.3) /52) 2.9 km SSW (0.8-3.5)

Direct Radiation Ambient Rad iation TLD (552) 11.35 (480/480 ) Taylors Island 15.20 (24/24) 13.02 (72/72)

(mR/90 days) (8.98-14.66) DR23 (13.94-16.38) (10.76-16.38) 12.6 km ENE Terrestrial Environment Vegetation Gamma (27) 27 81 (1/ 18) Camp Conoy 81 (1/3)

(pCi/L) Cs-137 (81 ) Entrance 186 (81) 0.7 km S 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.

20

January 1 - December 31, 2017 Docket Nos. 50-317/50-3 18/72-8 ID. 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 2017, four 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.

ID.B. PROGRAM III.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 of long-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.

21

January 1 - December 31 , 2017 Docket Nos. 50-317/50-318/72-8 m.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).

m.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.

m.B.4 Program Exceptions A loss of sample occurred at CCNPP Visitors Center (sample code SFA2) between December 11th and December 18th due to a loss of power at the site during a construction project. This program exception has been entered into the site's Corrective Action Program to ensure it does not recur. Normal sampling operation resumed with no further loss of data in the following week when the construction at the site concluded.

IlI.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 B and 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).

m.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.

m.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 and gamma emitting radionuclides.

22

January 1 - December 31 , 2017 Docket Nos. 50-317/50-3 18/72-8 Weekly analyses for beta activity on air particulate filters collected from all five locations showed values characteristic oflevels routinely observed in the REMP. These values ranged from 0.8 x 10-2 to 3.0 x 10-2 pCi/m3 for the indicator locations and 0.9 x 10-2to 2.9 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 SFAl , Meteorological Station.

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 SFB1), 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 . Cesium-137 was detected in one sample at an indicator location. The Cs-13 7 concentration was 16 +/- 8 pCi/kg. While the presence of Cs 137 in this sample 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 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. Cesium-137 was detected in five quarterly samples from indicator locations. The Cs-137 concentrations ranged from 49 +/- 29 to 158 +/- 40 pCi/kg. 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. These 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 23

January 1 - December 31 , 2017 Docket Nos. 50-317/50-318/72-8 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 of TLDs 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 .61 mR and ranged from 9.41 to 62.15 mR as reported in Table 4. The control location showed a 90 day mean of 11.80 mR and ranged from 10.94 to 12.44 mR. The location with the highest overall mean of 50.29 mR with a range of29.90 to 62.15 mR was SFDR14, SE ofISFSI. 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.

It can be noted there is an increasing trend in ISFSI TLD radiation exposure (Figure 7). This is expected as additional spent fuel casks are installed at the ISFSI each year. The ISFSI TLDs are located directly around the perimeter of the ISFSI. Due to the proximity of these TLDs to the spent fuel storage structures, they detect the small increase in radiation exposure each* year.

However, it is clear from Figure 4 that there is no observable direct radiation exposure of the public from the ISFSI, as the other REMP TLDs ( on-site, 4 miles, and beyond) show no observable increase in exposure when compared to control TLDs.

111.D. CONCLUSION Low levels of Cs-13 7 were observed in the environment surrounding the ISFSI during the period. The Cs-137 observations were attributed to fallout from past atmospheric weapons testing. Although much of this fallout has decayed over the years it remains a low level contributor to the background level manmade radionuclides in soil and vegetation around the world: 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 represented in Figure 3.

24

January 1 - December 31, 2017 Docket Nos. 50-317 /50-318/72-8 FIGURE7 Mean TLD Gamma Dose, ISFSI 12

-+- Control Location (SFDR7)

-9, ISFSI Mean (DR7, SFDRl-6, 8-18) 10 8

Ill ro "O

~ 6 er::

E 2

0 +----r--r----r--r----r--r----r--r---..---r---..--~--..---.---,---r---,---r---,---r----r--r----r--r----r--r----r--r-~

0 N 00 0 N <:t \0 00 0 N <:t 00 en en en 0 0 0 0 0 rl rl rl rl Calendar Year 25

January 1 - December 31, 201 7 Docket Nos. 50-317/50-318/72-8 Table 3 Synopsis of 2017 Calvert Cliffs Nuclear Power Plant Independent Spent Fuel Storage Installation Radiological Environmental Monitoring Program Sample Type Sampling Number of Number Analysis Analysis Number Frequency 1 Locations Collected Frequency 1 Analyzed Atmospheric Environment Air Particulates 2 w 5 259 Gross Beta w 259 Gamma MC 60 Direct Radiation Ambient Radiation a 20 480 TLD a 480 Terrestrial Environment Vegetation a 5 20 Gamma a 20 Soil Q 5 20 Gamma Q 20 1 W=weekly, M=monthly, Q=quarterly, SA=semiannual, A=annual, C=composite 2

Beta counting is performed after >72 hour decay, Gamma spectroscopy performed on monthly composites of weekly samples 26

January 1 - December 31, 2017 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 Pathway Sampled Number of Detection (LLD) Locations Me~m Highest Annual Mean (F) / Range1 Mean (F)/Range (Unit of Analyses (F)/Range 1 Mean Measurement) Performed Name/Distance &

Direction 2 Atmospheric Environment Air Particulates Gross Beta (259) 0.5 1.9 (208/208) MET Station SFA1 2.0 (52/51) 1.9 (51/51)

(10-2 pCi/m 3 ) (0.8-3.0) 0.4 km NW (0.8-3.0) (0.9-2.9)

Direct Radiation Ambient Radiation TLD (480) 28.61 (456/456) SE.of ISFSI 50.29 (24/24) 11 .80 (24/24)

(mR/90 days) (9.41-62.15) SFDR14 (29 .90-62 .15) (10.94-12.44) 0.1 km SE Terrestrial Environment Vegetation Gamma (20) 27 16 (1/16) On Site Before 16 (1/4)

(pCi/L) Cs-137 (16) Entrance to Camp (16)

Conoy SFB5 0.7 km ESE Soil Gamma (20) 17 107 (5/16) Entrance to Camp 129 (3/4)

(pCi/kg) Cs-137 (49-158)

Conoy SFS5 (75-158) 0.7 km ESE 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 center point of the ISFSI.

27

January 1 - December 31 , 2017 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) CY-CA-170-301 Current Revision, 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) Land Use Census Around Calvert Cliffs Nuclear Power Plant, August 2017 (10) Calvert Cliffs Independent Spent Fuel Storage Installation Technical Specifications, Appendix A to Materials License-SNM-2:;Q5

( 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.

28

January 1 - December 31 , 2017 Docket Nos. 50-317/50-318/72-8 (14) GEL 2017 Annual Quality Assurance Report for the Radiological Environmental Monitoring Program (REMP)

(15) Teledyne Browne Engineering Services, 2017 Annual Quality Assurance Report (16) Cesium-137 in the environment: Radioecology and Approaches to Assessment and Management, NCRP ReportNo.154. (2007) Bethesda, MD: National Council on Radiation Protection and Measurement.

29

January 1 - December 31 , 2017 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.

30

January 1 - December 31 , 2017 Docket Nos. 50-317/50-318/72-8 TABLE OF CONTENTS - SAMPLING LOCATIONS Table Title Page A-1 Locations of Environmental Sampling Stations for the Calvert Cliffs Nuclear Power Plant

.......... ................ .................................... ................................ ......... ........ ... ................ ....... ... 32 A-2 Locations of Environmental Sampling Stations for the Independent Spent Fuel Storage Installation at Calvert Cliffs ....... ..... ........ ... .. .... ... ........ .... ... ..... ..... ...... .... ............ ............. ... 36 Figure Title Page A-1 Map of Southern Maryland and Chesapeake Bay Showing Location of Calvert Cliffs Nuclear Power Plant ........................ ........ .......... .... .. ....... ............ .... ... ..... .. .... .. .. ....... .......... 33 A-2 Calvert Cliffs Nuclear Power Plant Sampling Locations, 0-2 Miles .... .... ............... ......... .34 A-3 Calvert Cliffs Nuclear Power Plant Sampling Locations, 0-10 Miles .. ..... ..... .... .... ........... 35 A-4 Independent Spent Fuel Storage Installation Sampling Locations ..... ..................... ...... .... 37 A-5 Enlarged Map of the Independent Spent Fuel Storage Installation Sampling Locations ..38 31

January 1 - December 31, 2017 Docket Nos. 50-317/50-318/72-8 TABLEA-1 Locations of Environmental Sampling Stations for the Calvert Cliffs Nuclear Power Plant Distance 1 D1rection 1 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, across from Vera's Beach Club 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 DR08 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 & Parran 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 IA 10 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 181 Garden Off Bay Breeze Rd 2.6 1.6 SSE 182 Garden Off Bay Breeze Rd 2.6 1.6 SSE 183 Garden Off Bay Breeze Rd 2.6 1.6 SSE 184 On site, before entrance to Camp Conoy 0.7 0.4 s 185 On site, before entrance to Camp Conoy 0.7 0.4 s 186 On site, before entrance to Camp Conoy 0.7 0.4 s 187 Emergency offsite facility 19.3 12.0 WNW 188 Emergency offsite facility 19.3 12.0 WNW 189 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 32

January 1 - December 31, 2017 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 33

January 1 - December 31 , 2017 Docket Nos . 50-317/50-318/72-8 Figure A-2 Calvert Cliffs Nuclear Power Plant Sampling Locations 0-2 Miles NE 34

January 1 - December 31 , 2017 Docket Nos. 50-317/50-318/72-8 Figure A-3 Calvert Cliffs Nuclear Power Plant Sampling Locations 0-10 Miles

!:!:'"Zr:..:.....-:-..:;====*i:!.'...... - -*

35

January 1 - December 31, 2017 Docket Nos. 50-317/50-318/72-8 Table A-2 Locations of Environmental Sampling Stations for the Independent Spent Fuel Storage Installation at Calvert Cliffs Distance 1 Direction 1 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 DR072 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 l

Distance and drrect1on from the central pomt of the ISFSI 2

Common to both the REMP and ISFSI monitoring program 36

January 1 - December 31, 2017 Docket Nos. 50-317/50-318/72-8 Figure A-4 Independent Spent Fuel Storage Installation Sampling Locations 37

January 1 - December 31 , 2017 Docket Nos. 50-317/50-31 8/72-8 Figure A-5 Enlarged Map of the Independent Spent Fuel Storage Installation Sampling Locations SFb1 SFS1 SFA1 38

January 1 - December 31, 2017 Docket Nos. 50-317/50-318/72-8 APPENDIXB Analysis Results for the REMP and the ISFSI Appendix Bis a presentation of the analytical results for the CCNPP and the ISFSI radiological environmental monitoring programs.

39

January 1 - December 31 , 2017 Docket Nos. 50-317/50-318/72-8 TABLE OF CONTENTS - ANALYTICAL RESULTS Table Title Page B-1 Concentration of Tritium and Gamma Emitters in Bay Water .. .. .... .. .. .. .... .. .. ...... .... ..........41 B-2 Concentration of Gamma Emitters in the Flesh of Edible Fish .. .. .. ................ .......... ........ .42 B-3 Concentration of Gamma Emitters in Oyster Samples ........ .... .. .... .. .. .. ........ .. .... .......... ...... 43 B-4 Concentration of Gamma Emitters in Shoreline Sediment.. .. .... .. .. ...... .... .... .. .. .................. 44 B-5 Concentration of Iodine-131 in Filtered Air .. .. .. .. ........ .... ...... .. .... .. .... ...... .......... .... .......... .. 45 B-6 Concentration of Beta Emitters in Air Particulates .............. ...... .... .. .... .... ...... .. .. ...... .. .... .... 47 B-7 Concentration of Gamma Emitters in Air Particulates ...... .......... .... .. ........ .. .... .... .............. 51 B-8a Concentration of Gamma Emitters in Vegetation Samples ........ .. .. ...... ...... ........ .... .... .......52 B-8b Concentration of Gamma Emitters in Vegetation From Locations Around the ISFSI.. .... 53 B-9 Concentration of Gamma Emitters in Soil Samples From Locations Around the ISFSI .. 54 B-10 Typical MDA Ranges for GammaSpectrometry ................ .............. .. .. .. .......... ...... ........ ... 55 B-11 Typical LLDs for Gamma Spectrometry .. .................. ...... ...... .... ...... .. .. ...... .. .. .... .... ........... 56 B-12 Pirect Radiation .... ........ .................... .. ........... ..... ...................... .. ... ...... .... ..... .... ......... ......... 57 40

January 1 - December 31, 2017 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 1 WA1 Intake Vicinity 2/3/2017

3/3/2017

3/30/2017 * <185 5/2/2017

5/31/2017

6/30/2017 * <184 7/31/2017

9/1/2017

10/2/2017 * <167 10/31/2017 *

. 12/1/2017

12/29/2017 * <190 WA2 Discharge Vicinity 2/3/2017

3/3/2017

3/30/2017 * <182 5/2/2017

5/31/2017

6/30/2017 * <183 7/31/2017

9/1/2017

10/2/2017 * <165 10/31/2017

12/1/2017

12/29/2017 * <191 1 Quarterly composite of monthly samples.

All Non-Natural Gamma Emitters <MDA 41

January 1 - December 31, 2017 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 8/22/2017 Striped bass

IA2 Discharge Area 8/22/2017 Spanish Mackeral

IA4 1 Patuxent River 8/22/2017 Striped bass

IA5 1 Patuxent River 8/22/2017 Spanish Mackeral

Control Location

All Non-Natural Gamma Emitters <MDA 42

January 1 - December 31, 2017 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 3/21/2017

6/29/2017

8/22/2017

10/17/2017

IA6 1 Kenwood Beach 3/21/2017

6/29/2017

8/22/2017

10/17/2017

Control Location

All Non-Natural Gamma Emitters <MDA 43

January 1 - December 31 , 2017 Docket Nos. 50-317/50-318/72-8 Table B-4 Concentration of Gamma Emitters in Shoreline Sediment (Results in units of pCi/kg (dry)+/- 2o)

Sample Code Sample Date Gamma Emitters WB1 Shoreline at Barge Rd. 4/5/2017

10/3/2017 *

All Non-Natural Gamma Emitters <MDA 44

January 1 - December 3 1, 2017 Docket Nos. 50-317/ 50-3 18/72-8 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 1/2/2017 1/9/2017 * * * *

1/9/2017 1/16/2017 * * * *

1/16/2017 1/23/2017 * * * *

1/23/2017 1/30/2017 * * * *

1/30/2017 2/6/2017 * * * *

2/6/2017 2/13/2017 * * * *

2/13/2017 2/20/2017 * * * *

2/20/2017 2/27/2017 * * * *

2/27/2017 3/6/2017 * * * *

3/6/2017 3/13/201 7 * * * *

3/13/2017 3/20/2017 * * * *

3/20/2017 3/27/2017 * * * *

3/27/2017 4/3/2017 * * * *

4/3/2017 4/10/2017 * * * *

4/10/2017 4/17/2017 * * * *

4/17/2017 4/24/2017 * * * *

4/24/2017 5/1/2017 * * * *

5/1/2017 5/8/2017 * * * *

5/8/2017 5/15/2017 * * * *

5/15/2017 5/22/2017 * * * *

5/22/2017 5/29/2017 * * * *

5/29/2017 6/5/2017 * * * *

6/5/2017 6/12/2017 * * * *

6/12/2017 6/19/201 7 * * * *

6/19/2017 6/26/2017 * * * *

6/26/2017 7/3/2017 * * * *

7/3/2017 7/10/20 17 * * * *

7/10/2017 7/17/20 17 * * * *

7/17/2017 7/24/201 7 * * * *

7/24/2017 7/31/2017 * * * *

7/3 1/2017 8/7/2017 * * * *

8/7/2017 8/14/20 17 * * * *

8/14/2017 8/21/2017 * * * *

8/21/2017 8/28/2017 * * * *

8/28/2017 9/4/2017 * * * *

9/4/2017 9/11/2017 * * * *

9/11/2017 9/18/2017 * * * *

9/18/2017 9/25/2017 * * * *

9/25/2017 10/2/201 7 * * * *

45

January 1 - December 31, 2017 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 10/2/2017 10/9/2017 * * * *

10/9/2017 10/16/2017 * * * *

10/16/2017 10/23/2017 * * * *

10/23/2017 10/30/2017 * * * *

10/30/2017 11/6/2017 * * * *

11/6/2017 11/13/2017 * * * *

11/13/2017 11/20/2017 * * * *

11/20/2017 11/27/2017 * * * *

11/27/2017 12/4/2017 * * * *

12/4/2017 12/11/2017 * * * *

12/11/2017 12/18/2017 * * * *

12/18/2017 12/25/2017 * * * *

12/25/2017 1/1/2018 * * * *

Control Location

All Non-Natural Gamma Emitters <MDA 46

January 1 - December 31 , 2017 Docket Nos. 50-317/50-3 18/72-8 Table B-6 Concentration of Beta Emitters in Air Particulates (Results in units of 10-2 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 1/2/2017 1/9/2017 1.8 +/- 0.2 1.8 +/- 0.2 1.8 +/- 0.2 2.0 +/- 0.2 1.9 +/- 0.2 1/9/2017 1/16/2017 2.0 +/- 0.1 2.0 +/- 0.1 1.9 +/- 0.1 1.9 +/- 0.1 1.8 +/- 0.1 1/16/2017 1/23/2017 1.2 +/- 0.1 1.1 +/- 0.1 1.2 +/- 0.1 1.3 +/- 0.1 1.2 +/- 0.1 1/23/2017 1/30/2017 1.5 +/- 0.1 1.5 +/- 0.1 1.5 +/- 0.1 1.4 +/- 0.1 1.5 +/- 0.1 1/30/2017 2/6/2017 2.3 +/- 0.2 2.3 +/- 0.2 2.3 +/- 0.2 2.5 +/- 0.2 2.6 +/- 0.2 2/6/2017 2/13/2017 2.6 +/- 0.1 2.4 +/- 0.1 2.3 +/- 0.1 2.7 +/- 0.1 2.3 +/- 0.1 2/13/2017 2/20/2017 2.0 +/- 0.1 2.1 +/- 0.1 1.8 +/- 0.1 2.2 +/- 0.1 2.0 +/- 0.1 2/20/2017 2/27/2017 1.5 +/- 0.1 1.4 +/- 0.1 1.4 +/- 0.1 1.5 +/- 0.1 1.2 +/- 0.1 2/27/2017 3/6/2017 1.7 +/- 0.1 1.7+/-0.1 1.7 +/- 0.1 1.9 +/- 0.1 1.7 +/- 0.1 3/6/2017 3/13/2017 1.5 +/- 0.1 1.5 +/- 0.1 1.5 +/- 0.1 1.5 +/- 0.1 1.4 +/- 0.1 3/13/2017 3/20/2017 1.5 +/- 0.1 1.7 +/- 0.1 1.7 +/- 0.1 1.7 +/- 0.1 1.6 +/- 0.1 3/20/2017 3/27/2017 1.9 +/- 0.1 1.9 +/- 0.1 2.1 +/- 0.1 2.1 +/- 0.1 2.0 +/- 0.1 3/27/2017 4/3/2017 1.0 +/- 0.1 1.1 +/-0.1 1.2 +/- 0.1 1.1 +/- 0.1 1.0 +/- 0.1 4/3/2017 4/10/2017 1.4 +/- 0.1 1.5 +/- 0.1 1.3 +/- 0.1 1.2 +/- 0.1 1.3 +/- 0.1 4/10/2017 4/17/2017 1.7+/-0.1 1.6 +/- 0.1 1.5 +/- 0.1 1.7 +/- 0.1 1.7+/-0.1 4/17/2017 4/24/2017 0.9 +/- 0.1 1.0 +/- 0.1 0.9 +/- 0.1 1.2 +/- 0.1 1.1 +/- 0.1 4/24/2017 5/1/2017 1.3 +/- 0.1 1.4 +/- 0.1 1.3 +/- 0.1 1.5 +/- 0.1 1.3 +/- 0.1 5/1/2017 5/8/2017 0.8 +/- 0.1 0.9 +/- 0.1 0.7 +/- 0.1 1.0 +/- 0.1 0.8 +/- 0.1 5/8/2017 5/15/2017 1.0 +/- 0.1 1.1 +/- 0.1 1.1 +/- 0.1 1.2 +/- 0.1 1.2 +/- 0.1 5/15/2017 5/22/2017 1.9 +/- 0.1 1.9 +/- 0.1 1.9 +/- 0.1 2.0 +/- 0.1 2.0 +/- 0.1 5/22/2017 5/29/2017 0.8 +/- 0.1 1.0+/- 0.1 0.9 +/- 0.1 0.8 +/- 0.1 1.0 +/- 0.1 5/29/2017 6/5/2017 1.7 +/- 0.1 1.8+/-0.1 1.8 +/- 0.1 2.0 +/- 0.1 1.8 +/- 0.1 6/5/2017 6/12/2017 2.2 +/- 0.1 2.2 +/- 0.1 2.1 +/-0.1 2.4 +/- 0.1 2.2 +/- 0.1 6/12/2017 6/19/2017 1.5 +/- 0.1 1.6+/- 0.1 1.6 +/- 0.1 1.5 +/- 0.1 1.7 +/- 0.1 6/19/2017 6/26/2017 2.1 +/- 0.1 2.0 +/- 0.1 1.9 +/- 0.1 2.3 +/- 0.1 2.2 +/- 0.1 6/26/2017 7/3/2017 1.8 +/- 0.1 2.0 +/- 0.1 2.2 +/- 0.2 2.2 +/- 0.2 2.1 +/- 0.1 7/3/2017 7/10/2017 2.5 +/- 0.1 2.5 +/- 0.1 2.3 +/- 0.1 2.6 +/- 0.1 2.6 +/- 0.1 7/10/2017 7/17/2017 2.2 +/- 0.1 2.5 +/- 0.1 2.4 +/- 0.1 2.6 +/- 0.1 2.5 +/- 0.1 7/17/2017 7/24/2017 2.5 +/- 0.1 2.7 +/- 0.1 2.5 +/- 0.1 2.8 +/- 0.2 2.8 +/- 0.1 7/24/2017 7/31/2017 1.5 +/- 0.1 1.5+/-0.1 1.7 +/- 0.1 1.6 +/- 0.1 1.6 +/- 0.1 7/31/2017 8/7/2017 1.7+/-0.1 1.9 +/- 0.1 1.7 +/- 0.1 2.0 +/- 0.1 2.0 +/- 0.1 8/7/2017 8/14/2017 1.8 +/- 0.1 1.9 +/- 0.2 2.0 +/- 0.1 2.1 +/- 0.1 2.2 +/- 0.1 8/14/2017 8/21/2017 2.5 +/- 0.2 2.6 +/- 0.2 2.4 +/- 0.2 2.7 +/- 0.2 2.7 +/- 0.2 8/21/2017 8/28/2017 1.9 +/- 0.1 2.0 +/- 0.1 1.8 +/- 0.1 2.1 +/- 0.1 2.1 +/- 0.1 8/28/2017 9/4/2017 1.7+/-0.1 1.8 +/- 0.1 1.7+/- 0.1 2.0 +/- 0.1 2.0 +/- 0.1 9/4/2017 9/11/2017 1.7+/-0.1 1.8 +/- 0.1 1.7 +/- 0.1 1.9 +/- 0.1 1.7 +/- 0.1 9/11/2017 9/18/2017 1.8+/-0.1 2.0 +/- 0.1 2.1 +/- 0.1 2.2 +/- 0.1 2.3 +/- 0.1 9/18/2017 9/25/2017 2.4 +/- 0.1 2.6 +/- 0.1 2.4 +/- 0.1 2.9 +/- 0.2 2.8 +/- 0.1 9/25/2017 10/2/2017 1.4+/- 0.1 1.5 +/- 0.1 1.5 +/- 0.1 1.7+/-0.1 1.6 +/- 0.1 47

January 1 - December 31 , 2017 Docket Nos. 50-317/50-318/72-8 Table B-6 Concentration of Beta Emitters in Air Particulates (Results in units of 10-2 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 10/2/2017 10/9/2017 1.7+/-0.1 1.9 +/- 0.1 1.7 +/- 0.1 1.8 +/- 0.1 1.9 +/- 0.1 10/9/2017 10/16/2017 1.2 +/- 0.1 1.3 +/- 0.1 1.2 +/- 0.1 1.3 +/- 0.1 1.2 +/- 0.1 10/16/2017 10/23/2017 2.6 +/- 0.1 2.6 +/- 0.2 2.5 +/- 0.1 2.7 +/- 0.1 2.9 +/- 0.2 10/23/2017 10/30/2017 1.8 +/- 0.1 1.7 +/- 0.1 1.8 +/- 0.1 1.9 +/- 0.1 1.7 +/- 0.1 10/30/2017 11/6/2017 2.4 +/- 0.1 2.7 +/- 0.2 2.8 +/- 0.2 2.6 +/- 0.1 2.6 +/- 0.1 11/6/2017 11/13/2017 1.7 +/- 0.1 1.8 +/- 0.1 1.8 +/- 0.1 2.0 +/- 0.1 2.1 +/- 0.1 11/13/2017 11/20/2017 2.7 +/- 0.2 2.7 +/- 0.2 2.6 +/- 0.2 2.8 +/- 0.2 2.7 +/- 0.2 11/20/2017 11/27/2017 2.7 +/- 0.1 2.5 +/- 0.1 2.5 +/- 0.1 2.7 +/- 0.1 2.8 +/- 0.1 11/27/2017 12/4/2017 3.0 +/- 0.2 3.3 +/- 0.2 3.4 +/- 0.2 3.3 +/- 0.2 3.5 +/- 0.2 12/4/2017 12/11/2017 2.8 +/- 0.2 2.8 +/- 0.2 2.9 +/- 0.2 2.7 +/- 0.2 2.9 +/- 0.2 12/11/2017 12/18/2017 2.9 +/- 0.1 2.9 +/- 0.2 2.9 +/- 0.1 3.1 +/- 0.1 3.0 +/- 0.1 12/18/2017 12/25/2017 2.9 +/- 0.1 2.9 +/- 0.2 2.9 +/- 0.1 2.9 +/- 0.1 3.0 +/- 0.1 12/25/2017 1/1/2018 2.7 +/- 0.2 2.8 +/- 0.2 2.3 +/- 0.2 2.5 +/- 0.2 3.0 +/- 0.2 Control Location 48

January 1 - December 31, 2017 Docket Nos. 50-31 7/50-318/72-8 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 Center NNW of ISFSI SSE of ISFSI 1/2/20 17 1/9/2017 1.9 +/- 0.1 1.9 +/- 0.2 1.8 +/- 0.2 1.8 +/- 0.2 1/9/2017 1/1 6/2017 2.2 +/- 0.1 2.0 +/- 0.1 1.9 +/- 0.1 1.9 +/- 0.1 1/16/2017 1/23/2017 1.2 +/- 0.1 1.2 +/- 0.1 1.1 +/- 0.1 1.3 +/- 0.1 1/23/2017 1/30/2017 1.6 +/- 0.1 1.5 +/- 0.1 1.4 +/- 0.1 1.5 +/- 0.1 1/30/2017 2/6/2017 2.4 +/- 0.2 2.4 +/- 0.2 2.3 +/- 0.2 2.5 +/- 0.2 2/6/2017 2/13/2017 2.6 +/- 0.1 2.6 +/- 0.1 2.4 +/- 0.1 2.6 +/- 0.1 2/13/2017 2/20/2017 2.1 +/- 0.1 2.1 +/- 0.1 2.0 +/- 0.1 2.1 +/- 0.1 2/20/2017 2/27/2017 1.4 +/- 0.1 1.3 +/- 0.1 1.2 +/- 0.1 1.5 +/- 0.1 2/27/2017 3/6/2017 1.9 +/- 0.1 1.7 +/- 0. 1 1.7 +/- 0.1 1.8 +/- 0.1 3/6/2017 3/13/2017 1.4 +/- 0.1 1.5 +/- 0.1 1.4 +/- 0.1 1.5 +/- 0.1 3/13/20 17 3/20/2017 1.7 +/- 0. 1 1.6 +/- 0. 1 1.6 +/- 0.1 1.6 +/- 0.1 3/20/2017 3/27/2017 2.1 +/- 0.1 1.8 +/- 0.1 1.7+/-0.1 1.8 +/- 0.1 3/27/2017 4/3/2017 1.2 +/- 0.1 1.1 +/-0 .1 1.0 +/- 0.1 1.1 +/- 0.1 4/3/201 7 4/10/2017 1.2 +/- 0.1 1.4 +/- 0.1 1.4 +/- 0.1 1.2 +/- 0. 1 4/10/2017 4/17/2017 1.8 +/- 0.1 1.8 +/- 0.1 1.5 +/- 0.1 1.6 +/- 0.1 4/17/2017 4/24/2017 1.0 +/- 0.1 0.9 +/- 0.1 1.0 +/- 0.1 1.0 +/- 0.1 4/24/2017 5/1/2017 1.4 +/- 0.1 1.4 +/- 0.1 1.4 +/- 0.1 1.3 +/- 0.1 5/1 /2017 5/8/20 17 0.8 +/- 0.1 0.9 +/- 0.1 0.9 +/- 0.1 1.0+/- 0.1 5/8/2017 5/15/2017 1.1 +/- 0.1 1.0 +/- 0.1 1.0 +/- 0.1 1.0+/-0.1 5/15/20 17 5/22/201 7 2.0 +/- 0.1 2.1 +/- 0.2 2.0 +/- 0.1 1.8+/- 0.1 5/22/2017 5/29/2017 1.0 +/- 0.1 0.9 +/- 0.1 0.8 +/- 0.1 0.9 +/- 0.1 5/29/2017 6/5/20 17 1.8 +/- 0.1 1.5 +/- 0.1 1.8 +/- 0.1 1.6+/- 0.1 6/5/2017 6/12/2017 2.2 +/- 0.1 2.4 +/- 0.1 2.1 +/- 0.1 2.1 +/- 0.1 6/12/2017 6/19/2017 1.6 +/- 0.1 1.6 +/- 0.1 1.6 +/- 0.1 1.4 +/- 0.1 6/19/2017 6/26/2017 2.2 +/- 0.1 2.0 +/- 0.1 2.1 +/- 0.1 1.9 +/- 0.1 6/26/2017 7/3/20 17 2.0 +/- 0.1 1.9 +/- 0.1 2.0 +/- 0.1 1.9 +/- 0.1 7/3/2017 7/10/2017 2.5 +/- 0.1 2.2 +/- 0.1 2.3 +/- 0.1 2.3 +/- 0.1 7/1 0/2017 7/17/2017 2.4 +/- 0.1 2.4 +/- 0.1 2.4 +/- 0.1 2.2 +/- 0.1 7/17/2017 7/24/2017 2.8 +/- 0.1 2.6 +/- 0.1 2.6 +/- 0.1 2.5 +/- 0.1 7/24/2017 7/31/2017 1.6 +/- 0.1 1.5 +/- 0.1 1.5 +/- 0.1 1.5 +/- 0.1 7/3 1/2017 8/7/2017 1.7 +/- 0.1 2.0 +/- 0. 1 1.8 +/- 0.1 1.8+/-0.1 8/7/2017 8/14/2017 2.1 +/- 0.1 2.1 +/- 0.1 1.8 +/- 0.1 1.8 +/- 0.1 8/1 4/2017 8/21/2017 2.8 +/- 0.2 2.4 +/- 0.2 2.7 +/- 0.2 2.4 +/- 0.2 8/21/2017 8/28/2017 1.9 +/- 0.1 1.8 +/- 0.1 1.9 +/- 0.1 1.8+/-0.1 8/28/2017 9/4/2017 2.0 +/- 0.1 1.7+/-0.1 1.9 +/- 0.1 1.7 +/- 0.1

9/4/2017 9/11/2017 1.7+/- 0. 1 1.5 +/- 0.1 1.8 +/- 0.1 1.6 +/- 0.1 9/11/2017 9/18/2017 2.0 +/- 0.1 2.0 +/- 0.1 1.9 +/- 0.1 1.9 +/- 0.1 9/18/2017 9/25/2017 2.7 +/- 0.1 2.5 +/- 0.1 2.7 +/- 0.1 2.5 +/- 0.1 9/25/2017 10/2/2017 1.5 +/- 0.1 1.5 +/- 0.1 1.5 +/- 0.1 1.5 +/- 0.1 49

January 1 - December 31 , 2017 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 Center NNWoflSFSI SSE of ISFSI 10/2/2017 10/9/2017 1.8 +/- 0.1 1.7 +/- 0.1 1.7 +/- 0.1 1.6 +/- 0.1 10/9/2017 10/16/2017 1.2 +/- 0.1 1.2 +/- 0.1 1.2 +/- 0.1 1.1 +/- 0.1 10/16/2017 10/23/2017 2.8 +/- 0.2 2.4 +/- 0.1 2.6 +/- 0.1 2.5 +/- 0.1 10/23/2017 10/30/2017 1.8 +/- 0.1 1.7 +/- 0.1 1.7+/- 0.1 1.6 +/- 0.1 10/30/2017 11/6/2017 2.6 +/- 0.2 2.4 +/- 0.1 2.4 +/- 0.1 2.5 +/- 0.1 11/6/2017 11/13/2017 1.8 +/- 0.1 1.8 +/- 0.1 1.7+/-0.1 1.6 +/- 0.1 11/13/2017 11/20/2017 2.6 +/- 0.2 2.9 +/- 0.4 2.6 +/- 0.2 2.6 +/- 0.2 11/20/2017 11/27/2017 2.7 +/- 0.1 2.6 +/- 0.1 2.6 +/- 0.1 2.5 +/- 0.1 11/27/2017 12/4/2017 2.9 +/- 0.2 2.8 +/- 0.1 2.8 +/- 0.1 2.9 +/- 0.2 12/4/2017 12/11/2017 2.7 +/- 0.2 2.5 +/- 0.1 2.7 +/- 0.2 2.6 +/- 0.2 2

12/11/2017 12/18/2017 3.0 +/- 0.1 2.9 +/- 0.1 2.8' +/- 0.1 12/18/2017 12/25/2017 2.9 +/- 0.2 2.7 +/- 0.1 2.8 +/- 0.1 2.7 +/- 0.1 12/25/2017 1/1/2018 2.6 +/- 0.2 2.7 +/- 0.2 2.8 +/- 0.2 2.7 +/- 0.2 Control Location 2

Power Outage 50

January 1 - December 31 , 2017 Docket Nos. 50-317/50-318/72-8 Table B-7 Concentration of Gamma Emitters in Air Particulates (Results in units of to* 3 pCi/m3 +/- 2cr)

Sample Date A1 A2 A3 A4 A5 1 Entrance to Camp Conoy Bay Breeze Route 765 at EOF Camp Conoy Siren Rd Lusby 1/30/2017 * * * *

2/27/20 17 * * * *

4/3/2017 * * * *

5/1/2017 * * * *

5/29/2017 * * * *

7/3/2017 * * * *

7/31 /2017 * * * *

8/29/2017 * * * *

10/2/2017 * * * *

10/30/2017 * * * *

11/28/2017 * * * *

1/2/2018 * * * *

Sample Date SFA1 SFA2 1 SFA3 SFA4 MET Station Vis itors Center NNWof ISFSI SSE of ISFSI 1/30/2017 * * *

2/27/2017 * * *

4/3/2017 * * *

5/1/2017 * * *

5/29/2017 * * *

7/3/2017 * * *

7/31/2017 * * *

8/29/2017 * * *

10/2/2017 * * *

10/30/2017 * * *

11/28/2017 * * *

1/2/2018 * * *

Control Location

All Non-Natural Gamma Emitters <MDA 51

January 1 - December 31 , 2017 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 Cs-137 Gamma Emitters IB1 Bay Breeze Rd 7/31/2017 Tree Leaves 2

8/21/2017 Collards 2

9/20/2017 Eggplant Leaves 2

IB2 Bay Breeze Rd 7/31/2017 Tree Leaves 2

8/21/2017 Tree Leaves 2

9/20/2017 Leafy portion of Peppers 2

IB3 2

Bay Breeze Rd 7/31/2017 Tree Leaves

2 8/21/2017 Tree Leaves

2 9/20/2017 Tree Leaves

IB4 Camp Conoy Entrance 7/31/2017 Tree Leaves 2

8/21/2017 Tree Leaves 2

9/20/2017 Eggplant Leaves 2

IB5 Camp Conoy Entrance 7/31/2017 Tree Leaves 2

8/21/2017 Collards 2

9/20/2017 Tree Leaves 2

IB6 Camp Conoy Entrance 7/31/2017 Tree Leaves 81 +/- 20

8/21/2017 Kale *

9/20/2017 Leafy portion of Peppers *

IB7 1 7/25/2017 Cabbage 2

EOF 2

8/21/2017 Cabbage Leafy portion of Peppers 2

9/20/2017 IB8 1 Kale 2

EOF 7/25/2017 8/21/2017 Eggplant Leaves 2

9/20/2017 Eggplant Leaves 2

IB9 1 7/25/2017 Collards 2

EOF 8/21/2017 Leafy portion of Peppers 2

9/20/2017 Tree Leaves 2

Control Location 2

This Isotope <MDA

All Non-Natural Gamma Emitters <MDA 52

January 1 - December 31, 2017 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) +/- 2cr)

Sample Code Sample Date Cs-137 Gamma Emitters SFB1 MET Station 3/20/2017 2

5/22/2017 2

9/11/2017 2

10/31/2017 2

SFB2 1 Visitor's Center 3/20/2017 2

5/22/2017 2

9/11/2017 2

10/31/2017 2

SFB3 NNW of ISFSI 3/20/2017 2

5/22/2017 2

9/11/2017 2

10/31/2017 2

SFB4 SSE of ISFSI 3/20/2017 2

5/22/2017 2

9/11/2017 2

10/31/2017 2

SFB5 On Site Before Entrance to Camp Conoy 3/20/2017 16 +/- 8

2

5/22/2017 9/11/2017 2

10/31/2017 2

Control Location 2

This Isotope <MDA

All Non-Natural Gamma Emitters <MDA 53

January 1 - December 31, 2017 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 3/20/2017 2

6/14/2017 2

9/11/2017 2

10/31/2017 2

SFS2 1 Visitors Center 3/20/2017 2

6/14/2017 2

9/11/2017 2

10/31/2017 2

SFS3 NNW of ISFSI 3/20/2017 101 +/- 38

6/14/2017 2

9/11/2017 49 +/- 29

10/31/2017 2

SFS4 SSE of ISFSI 3/20/2017 2

6/14/2017 2

9/11/2017 2

10/31/2017 2

SFSS Entrance to Camp Conoy 3/20/2017 158 +/- 40

6/14/2017 152 +/- 31

9/11/2017 2

10/31/2017 75 +/- 30

Control Location 2

This Isotope <MDA

All Non-Natural Gamma Emitters <MDA 54

January 1 - December 31 , 2017 Docket Nos. 50-317/50-318/72-8 Table B-10 Typical MDA Ranges for Gamma Spectrometry Bay Water, Surface Air Shoreline Selected Water, Fish (pCi/kg) Groundwater Oysters Soil Vegetation Particulates Milk (pCi/L) Sediment Nuclides Drinking Wet (pCi/L) (pCi/kg)Wet (pCi/kg)Dry (pCi/Kg)Wet (10-2 pCi/m 3 ) (pCi/kg)Dry Water (pCi/L)

Na-22 0.04 - 0.3 3.1-5.1 6.4 - 50.5 3.5 - 5.6 5.2 - 7.8 14.6 - 22.5 43.6 - 68.2 45.9 - 89.8 13.9 - 36.1 K-40 0.2- 5.0 33.4 - 58.8 54.3 - 338 38.6 - 63.4 42 - 58.9 127 - 180 300 - 597 333 - 786 109 - 284 Cr-51 1.0-15.3 26.1 - 41 67 .2 - 886 28 - 38 .4 36.5-49.0 110 - 222 669 - 2723 522 - 2374 86.8 - 246 Mn-54 0.04-0.3 2.8 - 4.5 2.7 - 42.2 3.3 - 4.9 3.9 - 5.7 12.0 - 18.8 40.7 - 63.2 44.6 - 90.5 11.3 - 28.9 Co-58 0.07 -0.6 2.9 - 4.8 6.2 - 56.5 3.4 - 4.9 4.2 - 5.9 12.7 - 22.6 54.3 - 120 56.5 - 128 11.4 - 29.9 Fe-59 0.26-2.1 6.8-10.7 21.7-192 7.6 - 10.7 11 - 14.7 33.7 - 61 .6 137 - 437 136 - 400 30.2 - 71 Co-60 0.03-0.3 2.9 - 4.8 4.1 - 45.7 3.5 - 5.3 4.7 - 6.9 14.0-21 .1 38.1 - 66.6 42.8 - 85.7 13.2 - 32.7 Zn-65 0.09-0.8 6.3 - 10 3.0 - 124 6.7-11 .4 10.3 - 16.1 29.9 - 46.8 121 - 187 117-251 29.3 - 70.3 Nb-95 0.1-1.4 3.4 - 5.3 6.5 - 105 3.8 - 5.6 4.6 - 6.5 14.9 - 29.8 91.8 - 291 81 .3 - 282 13.0 - 33.7 Zr-95 0.1-1.1 5.2 - 8 5.7-111 5.9 - 8.4 7.3 - 9.9 21 .6 - 37.8 102 - 216 91 .8 - 244 20.4 - 52.8 Ru-106 0.3- 2.3 24 .9 - 38.9 20.9 - 355 29.1 - 41.4 35.4 - 46.5 105 - 156 346 - 498 345 - 719 98.5 - 242 Ag-110m 0.03-0.3 2.7 - 4.3 3.8-39.1 3.1-4.3 3.9 - 5.1 11 .6 - 16.5 39 - 59.7 45.6 - 92.8 10.9 - 26.9 1-131 1 0.3-6.1 1.5 - 11.6 22 - 21660 5.2 - 9.8 .3 - 9.5 33.6 - 178 2180 - 79943 180 - 39606 7.3 - 89.6 Cs-134 0.03-0.2 2.7 - 4.2 2.9 - 35.2 3 - 4.5 3.7 - 5.1 11.3 - 16.4 40.7 - 52.3 40.3 - 80.2 10.7-26.8 Cs-137 0.03-0.2 3- 4.7 7.9 - 44.8 3.4 - 4.9 4.1 - 5.7 12.1 - 17.1 36.3 - 56.7 39.7 - 87.8 11 .4 - 30.2 Ba-140 0.4-196 6.5 - 11.6 25.2 - 1718 6.6 -10.6 6.9 - 10.9 27.6 - 98.8 696 - 7088 151 - 4732 16.7-70.1 La-140 0.4-196 6.5 - 11.6 25.2 - 1718 6.6 - 10.6 6.9 - 10.9 27.6 - 98.8 696 - 7088 151 - 4732 16.7-70.1 Ce-144 0.1 - 1.1 14.2 - 23.3 6.1 -159 16.4 - 23.4 20.3 - 28.3 45.4 - 73.2 168 - 231 145 - 360 40.8 - 102 1 This MDA range for I-131 ori a charcoal cartridge is typically 3.94 x 10-3 to 6.10 x 10-2 pCi/m 3 55

January 1 - December 31, 2017 Docket Nos. 50-317/50-318/72-8 Table B-11 Typical LLDs for Gamma Spectrometry Bay W ater, Air Selected Surface Water, Fish pCi/kg Ground water Oysters pCi/kg Precipitation Soil pCi/kg Vegetation Particulates Nuclides Drinking Water (wet) pCi/L (wet) pCi/L (dry) pCi/kg (wet) 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

The LLD for I-131 measured on a charcoal cartridge is 2.0 x10- pCi/m3 3

56

January 1 - December 31 , 2017 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 12.22 +/- 0.73 13.18 +/- 1.44 12.03 +/- 1.41 13.19 +/- 1.22 DR02 Route 765, Auto Dump 9.25 +/- 1.61 11 .01 +/- 0.52 10.39 +/- 0.69 11 .11 +/- 0.71 DR03 Route 765, Giovanni's 9.70 +/- 0.88 11.15+/- 0.49 10.03 +/- 0.54 11.11 +/- 0.79 Tavern DR04 Route 765, across from 11 .36 +/- 0.76 12.64 +/- 0.80 11 .56 +/- 0.49 12.50 +/- 1.29 Vera's Beach Club DR05 Route 765, John's Creek 11 .21 +/- 0.62 12.31 +/- 0.71 11 .30 +/- 1.10 12.04 +/- 1.14 DR06 Route 765 at Lusby 9.62 +/- 0.75 10.46 +/- 1.22 9.85 +/- 0.88 10.65 +/- 1.03 DR07 Entrance to Camp Conoy 9.41 +/- 0.91 10.66 +/- 1.02 9.97 +/- 0.89 10.64 +/- 1.65 DR08 Camp Conoy Rd at 13.46 +/- 0.92 14.42 +/- 1.73 13.71 +/- 1.24 14.66 +/- 1.08 Emergency Siren DR09 Bay Breeze Rd 9.56 +/- 0.44 10.71 +/- 0.81 10.25+/- 1.17 10.82 +/- 1.22 DR10 Calvert Beach Rd and 9.49 +/- 0.83 11.06 +/- 0.77 10.20 +/- 1.12 10.52 +/- 1.35 Decatur Street DR11 Dirt road off Mackall & 10.58 +/- 0.93 11.35 +/- 0.33 10.66 +/- 0.97 11 .52 +/- 1.00 Parran Rd DR12 Mackall & Bowen Rds 10.13 +/- 0.79 10.89 +/- 0. 75 10.62 +/- 0.90 10.79 +/- 0.27 DR13 Mackall Rd, near Wallville 11.18 +/- 0.45 12.75 +/- 0.46 11 .52 +/- 1.37 12.46 +/- 1.03 DR14 Rodney Point 11.40 +/- 0.84 12.41 +/- 1.91 12.09 +/- 0.52 12.45 +/- 0. 73 DR15 Mill Bridge & Turner Rds 11.29 +/- 0.55 12.10 +/- 1.02 11.31 +/- 0.57 11 .85 +/- 1.06 57

January 1 - December 31 , 2017 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 9.86 +/- 0.33 10.79 +/- 0.74 10.27 +/- 1.10 10.85 +/- 0.85 School DR17 Cove Point & Little Cove 12.43 +/- 0.87 13.53 +/- 1.18 13.57 +/- 1.11 13.96 +/- 1.11 Point Rds DR18 Cove Point 8.98 +/- 0.49 9.69 +/- 0.71 9.25 +/- 0.91 10.03 +/- 1.40 DR19 Long Beach 9.81 +/- 0.84 11.19+/-0.90 10.20 +/- 0.73 10.81 +/- 0.66 DR20 On site, near shore 12.73 +/- 0.69 14.32 +/- 1.29 13.39 +/- 1.09 14.02 +/- 0.87 DR21 1 EOF 11 .63 +/- 0.95 13.24 +/- 1.17 12.16 +/- 1.10 13.10 +/- 0.97 DR22 1 Solomons Island 10.76 +/- 0.93 12.10 +/- 0.77 10.94 +/- 0.81 11.47 +/- 1.29 DR23 1 Taylors Island 13.94 +/- 1.44 16.38 +/- 0.58 14.69 +/- 1.61 15.80 +/- 1.05 DR30 MET Station 11 .09+/- 1.11 11 .56 +/- 0.70 10.96 +/- 0.58 12.06 +/- 0.75 SFDR01 SW of ISFSI 15.34 +/- 0.69 17.31 +/- 0.64 16.06 +/- 1.37 19.56 +/- 1.93 SFDR02 NNWoflSFSI 17.51 +/- 2.24 18.84 +/- 2.02 18.86 +/- 1.56 18.63 +/- 2.67 SFDR03 North of ISFSI 31 .10 +/- 6.90 34.62 +/- 4.90 33.11 +/- 4.52 37.89 +/- 5.21 SFDR04 NE of ISFSI 31 .87 +/- 5.29 33.89 +/- 4.73 31 .45 +/- 5.29 35.19 +/- 6.99 SFDR05 East of ISFSI 21 .20 +/- 3.85 24.66 +/- 4.35 20.20 +/- 2.70 26.28 +/- 4.25 SFDR06 ESE of ISFSI 18.46 +/- 1.98 21.49 +/- 2.05 18.24 +/- 2.63 20.95 +/- 2.33 58

January 1 - December 31 , 2017 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 SFDR07 1 Visitor's Center 10.94 +/- 0.71 12.37 +/- 0.93 11 .46 +/- 1.20 12.44 +/- 0.97 SFDR08 NNW of ISFSI 23.25 +/- 1.94 24.67 +/- 2.97 22.73 +/- 5.46 23.84 +/- 3.40 SFDR09 SSE of ISFSI 27.31 +/- 1.98 29.91 +/- 9.03 31.59 +/- 14.56 61 .60 +/- 4.68 SFDR10 NW of ISFSI 25.41 +/- 6.72 28.16 +/- 7.80 31 .63 +/- 1.16 27.52 +/- 4.31 SFDR11 WNW ISFSI 23.03 +/- 3.45 23.56 +/- 2.06 21.35 +/- 2.19 22.37 +/- 2.61 SFDR12 WSWoflSFSI 39.39 +/- 7.60 42.43 +/- 8.51 36 .01 +/- 8.18 39.82 +/- 8.50 SFDR13 South of ISFSI 28.40 +/- 7.12 36.25 +/- 3.44 31 .16 +/- 6.79 27.28 +/- 5.28 SFDR14 SE of ISFSI 62.15 +/- 6.70 29.90 +/- 1.93 51 .75+/- 15.72 57.37 +/- 7.10 SFDR15 ENE of ISFSI 22.84 +/- 6.50 27.70 +/- 6.43 22.34 +/- 3.68 26.04 +/- 4.27 SFDR16 SSW of ISFSI 36.35 +/- 4.64 39.84 +/- 5.87 42.84 +/- 5.75 44.76 +/- 8.59 SFDR17 NNE of ISFSI 37.71 +/- 6.45 43.58 +/- 5.84 39.41 +/- 4.1 5 39.63 +/- 6.04 SFDR18 West of ISFSI 38.89 +/- 5.18 41 .74 +/- 9.96 35.09 +/- 7.92 36.45 +/- 8.08 Control Location 59

January 1 - December 31, 2017 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 Eckert and Ziegler Analytics, Inc. (EZA) 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 MDAs achieved by Teledyne Brown for Gamma Spectroscopy.

The EIS laboratory's results contained in Table C-1 generally agree with the interlaboratory's comparison results within the range of +/-2cr of each other One analysis did not meet the specified acceptance criteria and is recorded in the EIS Corrective Action program. The Analytics Gross Beta in Water study for March 2017 was low and did not meet NRC Resolution Test Criteria while other crosschecks analyzed in the same batch were acceptable. The beaker used to concentrate the sample was rinsed again with IM Nitric acid and the residue was captured and analyzed indicating presence of additional Beta emitters, confirming the low result was directly due to insufficient transfer of concentrated sample to the planchet being analyzed.

Subsequent to this event, the procedure was updated to include that sample glassware is given a thorough rinse with IM Nitric acid to insure any residue dried on the beaker during the evaporation step is completely dissolved and transferred to the planchet. All crosscheck study results since have had improved recovery and pass NRC Resolution Test Criteria without further issue. In addition, all the sets of intercomparison results in the table are in full agreement when they were further evaluated using the NRC Resolution Test Criteria 1. The uncertainties for the EIS laboratory's results and Analytics' results are +/-2cr while the ERA laboratory's uncertainty is based on USEP A guidelines 2

All the results contained in Table C-2 agree within the range of +/-2cr of each other with their respective EIS laboratory original, replicate and/or Teledyne Brown Engineering's split laboratory samples, except for the comparisons of one sample involving Cs-137 results: a tree leaves sample at IB6 Camp Conoy Entrance collected on 7/31/ 17. The original, 81.1+/- 19 .9 pCi/kg, and replicate analysis, 43.2 +/-15.6 pCi/kg, of the tree leaves sample from IB6 did not agree within +/-2 cr of each other while the replicate and the split lab results, 48.2 +/- 12.3 pCi/kg, did agree within +/-2 of each other. These minor discrepancies, which have been observed in previous reporting periods, are most probably due to counting statistics and/or the heterogeneous nature of this type of sample. Other samples whose nature generally preclude 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 60

January 1 - December 31 , 2017 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 ... .. ... ......... .... ....... ................. ...............62 C-2 Results of Quality Assurance Program ...... ................... ...... ..... .... .. .. ... ....... .... ............. .... ... 66 C-3 Teledyne Brown Engineering's Typical MDAs for Gamma Spectrometry .. ...... ......... .. .. .76 61

January 1 - December 31, 2017 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 3/16/2017 Water-pCi/L Beta 217 1 279 3/16/2017 Cartridge- pCi 1-131 87.0 96.4 3/16/2017 Water-pCi/L H3 9860 9980 3/16/2017 Milk-pCi/1 1-131 103 97 .9 Ce-141 165 145 Cr-51 299 290 Cs-134 118 120 Cs-137 165 140 Co-58 148 150 Mn-54 176 164 Fe-59 136 129 Zn-65 215 199 Co-60 192 183 4/10/2017 Water-pCi/L Ba-133 50.2 49.7 Cs-134 88.3 90 .1 Cs-137 225.7 206 Co-60 59.5 54.7 Zn-65 66.2 53.8 4/10/2017 Water-pCi/1 1-131 29.1 29.9 4/10/2017 Water-pCi/1 Beta 32.4 38.5 4/10/2017 Water-pCi/1 H3 7347 6850 62

January 1 - December 31 , 2017 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 6/8/2017 Filter-pCi/Filter Ce-141 122 118 Cr-51 238 246 Cs-134 129 147 Cs-137 121 117 Co-58 116 121 Mn-54 140 134 Fe-59 99.0 89.9 Zn-65 175 159 Co-60 144 149 6/8/2017 Water-pCi/L 1-131 99.0 96 .7 Ce-141 220 199 Cr-51 503 413 Cs-134 242 247 Cs-137 218 197 Co-58 222 204 Mn-54 255 225 Fe-59 170 151 Zn-65 307 267 Co-60 278 250 6/8/2017 Water-pCi/1 Beta 242 249 7/10/2017 Water-pCi/1 H3 5305 5060 9/14/2017 Water-pCi/1 H3 14900 14200 9/14/2017 Water-pCi/1 Beta 64.2 67.2 63

January 1 - December 31, 2017 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 9/18/2017 Filter-pCi/Filter Cs-134 1334 1440 Cs-137 1050 954 Co-60 309 271 Zn-65 153 123 10/6/2017 Water-pCi/L Ba-133 76.2 73 .7 Cs-134 54.3 53.0 Cs-137 58.5 52.9 Co-60 74.9 69 .5 Zn-65 411.5 348 10/6/2017 Water-pCi/L 1-131 25.9 24.2 12/7/2017 Water-pCi/1 Beta 284 265 12/7/2017 Cartridge- pCi 1-131 44.0 47.5 12/7/2017 Filter-pCi/Filter Ce-141 61 .9 59.4 Cr-51 123 146 Cs-134 62.8 75.4 Cs-137 82.8 85.3 Co-58 50.1 54.3 Mn-54 97.0 97.1 Fe-59 69.6 68 .5 Zn-65 124 127 Co-60 95.7 104 64

January 1 - December 31, 2017 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 Resu lts Results 12nt2017 Milk-pCi/1 1-131 71.4 57.8 Ce-141 113 98 .3 Cr-51 254 242 Cs-134 129 125 Cs-137 163 141 Co-58 89.5 89 .9 Mn-54 184 161 Fe-59 127 113 Zn-65 218 211 Co-60 185 173 1

See discussion at the beginning of the Appendix 65

January 1 - December 31, 2017 Docket Nos. 50-317 /50-318/72-8 Table C-2 Results of Quality Assurance Program Sample Type and Type of Original Replicate Split Sample Date Result Units Location Analysis Analysis Analysis Analysis Air Filter - A 1 01/09/17 Gross Beta pCi/m 3 1.8 +/- 0.2 1.8 +/- 0.2 **

Air Filter - A2 01/09/17 Gross Beta pCi/m 3 1.8 +/- 0.2 2.0 +/- 0.2 **

Air Filter - A3 01/09/17 Gross Beta pCi/m 3 1.8 +/- 0.2 1.8 +/- 0.2 **

Air Filter - A4 01/09/17 Gross Beta pCi/m 3 2.0 +/- 0.2 2.1 +/- 0.2 **

Air Filter - A5 01/09/17 Gross Beta pCi/m 3 1.9 +/- 0.2 2.0 +/- 0.2 **

Air Filter - SFA1 01/09/17 Gross Beta pCi/m 3 1.9+/-0.1 2.0 +/- 0.2 **

Air Filter - SFA2 01/09/17 Gross Beta pCi/m 3 1.9 +/- 0.2 2.1 +/- 0.2 **

Air Filter - SFA3 01/09/17 Gross Beta pCi/m 3 1.8 +/- 0.2 2.1 +/- 0.2 **

Air Filter - SFA4 01/09/17 Gross Beta pCi/m 3 1.8 +/- 0.2 2.0 +/- 0.2 **

Air Iodine - A 1 01/09/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - A2 01/09/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - A3 01/09/17 1-131 pCi/m 3 <MDA <MDA **

Air Filter - A 1 02/13/17 Gross Beta pCi/m 3 2.6 +/- 0.1 2.5 +/- 0.1 **

Air Filter - A2 02/13/17 Gross Beta pCi/m 3 2.4 +/- 0.1 2.5 +/- 0.1 **

Air Filter - A3 02/13/17 Gross Beta pCi/m 3 2.3 +/- 0.1 2.3 +/- 0.1 **

Air Filter - A4 02/13/17 Gross Beta pCi/m 3 2.7 +/- 0.1 2.6 +/- 0.1 **

Air Filter - A5 02/13/17 Gross Beta pCi/m 3 2.4 +/- 0.1 2.4 +/- 0.1 **

Air Filter - SFA 1 02/13/17 Gross Beta pCi/m 3 2.6 +/- 0.1 2.8 +/- 0.1 **

Air Filter - SFA2 02/13/17 Gross Beta pCi/m 3 2.6 +/- 0.1 2.6 +/- 0.1 **

Air Filter - SFA3 02/13/17 Gross Beta pCi/m 3 2.4 +/- 0.1 2.4 +/- 0.1 **

Air Filter - SFA4 02/13/17 Gross Beta pCi/m 3 2.6 +/- 0.1 2.4 +/- 0.1 **

66

January 1 - December 31 , 2017 Docket Nos. 50-317 /50-318/72-8 Table C-2 Results of Quality Assurance Program Sample Type and Type of Original Replicate Split Sample Date Result Units Location Analysis Analysis Analysis Analysis Air Filter - A 1 02/27/17 Gamma pCi/m 3 <MDA <MDA <MDA Air Filter - A2 02/27/17 Gamma pCi/m 3 <MDA <MDA <MDA Air Filter - A3 02/27/17 Gamma pCi/m 3 <MDA <MDA <MDA Air Filter - A4 02/27/17 Gamma pCi/m 3 <MDA <MDA <MDA Air Filter - A5 02/27/17 Gamma pCi/m 3 <MDA <MDA <MDA Air Filter - SFA 1 02/27/17 Gamma pCi/m 3 <MDA <MDA <MDA Air Filter - SFA2 02/27/17 Gamma pCi/m 3 <MDA <MDA <MDA Air Filter - SFA4 02/27/17 Gamma pCi/m 3 <MDA <MDA <MDA Air Iodine - A 1 02/27/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - A2 02/27/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - A3 02/27/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - A4 02/27/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - A5 02/27/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - SFA 1 02/27/17 1-131 pCi/m 3 <MDA <MDA **

Air Filter - A 1 03/06/17 Gross Beta pCi/m 3 1.7 +/- 0.1 1.7 +/- 0.1 **

Air Filter - A2 03/06/17 Gross Beta pCi/m 3 1.7 +/- 0.1 1.7 +/- 0.1 **

Air Filter - A3 03/06/17 Gross Beta pCi/m 3 1.7 +/- 0.1 1.7 +/- 0.1 **

Air Filter - A4 03/06/17 Gross Beta pCi/m 3 1.9 +/- 0.1 2.0 +/- 0.1 **

Air Filter - A5 03/06/17 Gross Beta pCi/m 3 1.7 +/- 0.1 1.7 +/- 0.1 **

Air Filter - SFA 1 03/06/17 Gross Beta pCi/m 3 1.9 +/- 0.1 1.9 +/- 0.1 **

Air Filter - SFA2 03/06/17 Gross Beta pCi/m 3 1.7 +/- 0.1 1.8 +/- 0.1 **

Air Filter - SFA3 03/06/17 Gross Beta pCi/m 3 1.7 +/- 0.1 1.8 +/- 0.1 **

Air Filter - SFA4 03/06/17 Gross Beta pCi/m 3 1.8 +/- 0.1 1.8 +/- 0.1 **

67

January 1 - December 31, 2017 Docket Nos. 50-317 /50-318/72-8 Table C-2 Results of Quality Assurance Program Sample Type and Type of Original Replicate Split Sample Date Result Units Location Analysis Analysis Analysis Analysis Air Iodine - A 1 04/03/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - A2 04/03/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - A3 04/03/17 1-131 pCi/m 3 <MDA <MDA **

Air Filter - A 1 04/10/17 Gross Beta pCi/m 3 1.4 +/- 0.1 1.3 +/- 0.1 **

Air Filter - A2 04/10/17 Gross Beta pCi/m 3 1.5 +/- 0.1 1.3 +/- 0.1 **

Air Filter - A3 04/10/17 Gross Beta pCi/m 3 1.3 +/- 0.1 1.3 +/- 0.1 **

Air Filter - A4 04/10/17 Gross Beta pCi/m 3 1.2 +/- 0.1 1.4 +/- 0.1 **

Air Filter - AS 04/10/17 Gross Beta pCi/m 3 1.3 +/- 0.1 1.2 +/- 0.1 **

Air Filter - SFA 1 04/10/17 Gross Beta pCi/m 3 1.2 +/- 0.1 1.3 +/- 0.1 **

Air Filter - SFA2 04/10/17 Gross Beta pCi/m 3 1.4 +/- 0.1 1.5 +/- 0.1 **

Air Filter - SFA3 04/10/17 Gross Beta pCi/m 3 1.4 +/- 0.1 1.2 +/- 0.1 **

Air Filter - SFA4 04/10/17 Gross Beta pCi/m 3 1.2 +/- 0.1 1.3 +/- 0.1 **

Air Filter.- A 1 05/22/17 Gross Beta pCi/m 3 1.9 +/- 0.1 1.7 +/- 0.1 **

Air Filter - A2 05/22/17 Gross Beta pCi/m 3 1.9 +/- 0.1 1.9 +/- 0.1 **

Air Filter - A3 05/22/17 Gross Beta pCi/m 3 1.9 +/- 0.1 1.7 +/- 0.1 **

Air Filter - A4 05/22/17 Gross Beta pCi/m 3 2.0 +/- 0.1 1.8 +/- 0.1 **

Air Filter - AS 05/22/17 Gross Beta pCi/m 3 2.0 +/- 0.1 1.8 +/- 0.1 **

Air Filter - SFA 1 05/22/17 Gross Beta pCi/m 3 2.0 +/- 0.1 2.0 +/- 0.1 **

Air Filter - SFA2 05/22/17 Gross Beta pCi/m 3 2.1 +/- 0.2 2.0 +/- 0.2 **

Air Filter - SFA3 05/22/17 Gross Beta pCi/m 3 2.0 +/- 0.1 1.9 +/- 0.1 **

Air Filter - SFA4 05/22/17 Gross Beta pCi/m 3 1.8 +/- 0.1 1.7+/-0.1 **

68

January 1 - December 31 , 2017 Docket Nos. 50-317/50-318/72-8 Table C-2 Results of Quality Assurance Program Sample Type and Type of Original Replicate Split Sample Date Result Units Location Analysis Analysis Analysis Analysis Air Iodine - A 1 06/12/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - A2 06/12/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - A3 06/12/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - A4 06/12/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - A5 06/12/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - SFA 1 06/12/17 1-131 pCi/m 3 <MDA <MDA **

Bottom sediment -

WBS2 06/29/17 Gamma pCi/kg <MDA <MDA <MDA Bottom sediment -

WBS4 06/29/17 Gamma pCi/kg <MDA <MDA <MDA Oysters - IA3 06/29/17 Gamma pCi/kg <MDA <MDA <MDA Oysters - IA6 06/29/17 Gamma pCi/kg <MDA <MDA <MDA Air Filter - A 1 07/03/17 Gross Beta pCi/m 3 1.8 +/- 0.1 1.9 +/- 0.1 **

Air Filter - A2 07/03/17 Gross Beta pCi/m 3 2.0 +/- 0.1 2.0 +/- 0.1 **

Air Filter - A3 07/03/17 Gross Beta pCi/m 3 2.2 +/- 0.2 2.1 +/- 0.2 **

Air Filter - A4 07/03/17 Gross Beta pCi/m 3 2.2 +/- 0.2 2.3 +/- 0.2 **

Air Filter - A5 07/03/17 Gross Beta pCi/m 3 2.1 +/- 0.1 2.3 +/- 0.2 **

Air Filter - SFA 1 07/03/17 Gross Beta pCi/m 3 2.0 +/- 0.1 2.0 +/- 0.1 **

Air Filter - SFA2 07/03/17 Gross Beta pCi/m 3 1.9 +/- 0.1 2.0 +/- 0.1 **

Air Filter - SFA3 07/03/17 Gross Beta pCi/m 3 2.0 +/- 0.1 2.0 +/- 0.1 **

Air Filter - SFA4 07/03/17 Gross Beta pCi/m 3 1.9 +/- 0.1 2.0 +/- 0.1 **

69

January 1 - December 31 , 2017 Docket Nos. 50-317 /50-318/72-8 Table C-2 Results of Quality Assurance Program Sample Type and Type of Original Replicate Split Sample Date Result Units Location Analysis Analysis Analysis Analysis Cabbage - IB7 07/25/17 Gamma pCi/kg <MDA <MDA <MDA Collards - IB9 07/25/17 Gamma pCi/kg <MDA <MDA <MDA Kale - IB8 07/25/17 Gamma pCi/kg <MDA <MDA <MDA BayWater-WA1 07/31/17 Gamma pCi/L <MDA <MDA <MDA Bay Water -WA2 07/31/17 Gamma pCi/L <MDA <MDA <MDA Tree Leaves - IB4 07/31/17 Gamma pCi/kg <MDA <MDA <MDA Tree Leaves - IB5 07/31/17 Gamma pCi/kg <MDA <MDA <MDA Tree Leaves - IB6 1 07/31/17 Cs-137 pCi/kg 81 .1 +/-19.9 43.2 +/- 15.6 48.3 +/- 12.3 Air Filter - A 1 08/14/17 Gross Beta pCi/m 3 1.8 +/- 0.1 1.8 +/- 0.1 **

Air Filter - A2 08/14/17 Gross Beta pCi/m 3 1.9 +/- 0.2 2.0 +!- 0.2 **

Air Filter - A3 08/14/17 Gross Beta pCi/m 3 2.0 +/- 0.1 2.0 +/- 0.1 **

Air Filter - A4 08/14/17 Gross Beta pCi/m 3 2.1 +/- 0.1 2.1 +/-0.1 **

Air Filter - A5 08/14/17 Gross Beta pCi/m 3 2.2 +/- 0.1 2.1 +/- 0.1 **

Air Filter - SFA 1 08/14/17 Gross Beta pCi/m 3 2.0 +!- 0.1 2.1 +/-0.1 **

Air Filter - SFA2 08/14/17 Gross Beta pCi/m 3 2.1 +/-0.1 2.1 +/-0.1 **

Air Filter - SFA3 08/14/17 Gross Beta pCi/m 3 1.8 +/- 0.1 1.9 +/- 0. 1 **

Air Filter - SFA4 08/14/17 Gross Beta pCi/m 3 1.8 +/- 0.1 1.9 +/- 0.1 **

Oysters - IA3 08/22/17 Gamma pCi/kg <MDA <MDA <MDA Oysters - IA6 08/22/17 Gamma pCi/kg <MDA <MDA <MDA 70

January 1 - December 31, 2017 Docket Nos. 50-317 /50-318/72-8 Table C-2 Results of Quality Assurance Program Sample Type and Type of Original Replicate Split Sample Date Result Units Location Analysis Analysis Analysis Analysis Spanish Mackeral - IA2 08/22/17 Gamma pCi/kg <MDA <MDA <MDA Spanish Mackeral - IA5 08/22/17 Gamma pCi/kg <MDA <MDA <MDA Air Iodine - A 1 09/11/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - A2 09/11/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - A3 09/11/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - A4 09/11/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - A5 09/11/17 1-131 pCi/m 3 <MDA <MDA **

Misc ground coverage -

SFB4 09/11/17 Gamma pCi/kg <MDA <MDA <MDA Misc ground coverage -

SFB5 09/11/17 Gamma pCi/kg <MDA <MDA <MDA Soil - SFS4 09/11/17 Gamma pCi/m 3 <MDA <MDA <MDA Soil - SFS5 09/11/17 Gamma pCi/m 3 <MDA <MDA <MDA Air Filter - A 1 10/02/17 Gamma pCi/m 3 <MDA <MDA <MDA Air Filter - A2 10/02/17 Gamma pCi/m 3 <MDA <MDA <MDA Air Filter - A3 10/02/17 Gamma pCi/m 3 <MDA <MDA <MDA Air Filter - A4 10/02/17 Gamma pCi/m 3 <MDA <MDA <MDA Air Filter - A5 10/02/17 Gamma pCi/m 3 <MDA <MDA <MDA Air Filter - SFA 1 10/02/17 Gamma pCi/m 3 <MDA <MDA <MDA Air Filter - SFA2 10/02/17 Gamma pCi/m 3 <MDA <MDA <MDA 71

January 1 - December 31, 2017 Docket Nos. 50-317 /50-318/72-8 Table C-2 Results of Quality Assurance Program Sample Type and Type of Original Replicate Split Sample Date Result Units Location Analysis Analysis Analysis Analysis Air Filter - SFA3 10/02/17 Gamma pCi/m 3 <MDA <MDA <MDA Air Filter - SFA4 10/02/17 Gamma pCi/m 3 <MDA <MDA <MDA Shoreline sediment -

WB1 10/03/17 Gamma pCi/kg <MDA <MDA <MDA Air Iodine - A 1 10/09/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - A2 10/09/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - A3 10/09/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - A4 10/09/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - A5 10/09/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - SFA1 10/09/17 1-131 pCi/m 3 <MDA <MDA **

Air Filter - A 1 10/30/17 Gross Beta pCi/m 3 1.8 +/- 0.1 1.7 +/- 0.1 **

Air Filter - A2 10/30/17 Gross Beta pCi/m 3 1.7 +/- 0.1 1.8 +/- 0.1 **

Air Filter - A3 10/30/17 Gross Beta pCi/m 3 1.8 +/- 0.1 1.8 +/- 0.1 **

Air Filter - A4 10/30/17 Gross Beta pCi/m 3 1.9 +/- 0.1 1.9 +/- 0.1 **

Air Filter - A5 10/30/17 Gross Beta pCi/m 3 1.7 +/- 0.1 1.8 +/- 0.1 **

Air Filter - SFA 1 10/30/17 Gross Beta pCi/m 3 1.8 +/- 0.1 1.8 +/- 0.1 **

Air Filter - SFA2 10/30/17 Gross Beta pCi/m 3 1.7 +/- 0.1 1.6 +/- 0.1 **

Air Filter - SFA3 10/30/17 Gross Beta pCi/m 3 1.7 +/- 0.1 1.8 +/- 0.1 **

Air Filter - SFA4 10/30/17 Gross Beta pCi/m 3 1.6 +/- 0.1 1.6 +/- 0.1 **

BayWater-WA1 10/31/17 Gamma pCi/L <MDA <MDA <MDA Bay Water - WA2 10/31/17 Gamma pCi/L <MDA <MDA <MDA 72

January 1 - December 31, 2017 Docket Nos. 50-317/50-318/72-8 Table C-2 Results of Quality Assurance Program Sample Type and Type of Original Replicate Split Sample Date Result Units Location Analysis Analysis Analysis Analysis Air Iodine - A 1 11/06/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - A1 11/06/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - A2 11/06/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - A3 11/06/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - A4 11/06/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - AS 11/06/17 1-131 pCi/m 3 <MDA <MDA **

Air Iodine - SFA1 11/06/17 1-131 pCi/m 3 <MDA <MDA **

Air Filter.-A1 11/27/17 Gross Beta pCi/m 3 2.7 +/- 0.1 2.6 +/- 0.1 **

Air Filter - A2 11/27/17 Gross Beta pCi/m 3 2.5 +/- 0.1 2.6 +/- 0.1 **

Air Filter - A3 11/27/17 Gross Beta pCi/m 3 2.5 +/- 0.1 2.6 +/- 0.1 **

Air Filter - A4 11/27/17 Gross Beta pCi/m 3 2.7 +/- 0.1 2.8 +/- 0.1 **

Air Filter - AS 11/27/17 Gross Beta pCi/m 3 2.8 +/- 0.1 2.7 +/- 0.1 **

Air Filter- SFA1 11/27/17 Gross Beta pCi/m 3 2.7 +/- 0.1 2.6 +/- 0.1 **

Air Filter - SFA2 11/27/17 Gross Beta pCi/m 3 2.6 +/- 0.1 2.7 +/- 0.1 **

Air Filter - SFA3 11/27/17 Gross Beta pCi/m 3 2.6 +/- 0.1 2.6 +/- 0.1 **

Air Filter - SFA4 11/27/17 Gross Beta pCi/m 3 2.5 +/- 0.1 2.6 +/- 0.1 **

Air Filter - A 1 12/25/17 Gross Beta pCi/m 3 2.9 +/- 0.1 3.0 +/- 0.1 **

Air Filter - A2 12/25/17 Gross Beta pCi/m 3 2.9 +/- 0.2 3.1 +/- 0.2 **

Air Filter - A3 12/25/17 Gross Beta pCi/m 3 2.9 +/- 0.1 3.0 +/- 0.1 **

Air Filter - A4 12/25/17 Gross Beta pCi/m 3 2.9 +/- 0.1 3.0 +/- 0.1 **

73

January 1 - December 31, 2017 Docket Nos. 50-317 /50-318/72-8 Table C-2 Results of Quality Assurance Program Sample Type and Type of Original Replicate Split Sample Date Result Units Location Analysis Analysis Analysis Analysis Air Filter - A5 12/25/17 Gross Beta pCi/m 3 3.0 +/- 0.1 3.1 +/- 0.1 **

Air Filter - SFA 1 12/25/17 Gross Beta pCi/m 3 2.9 +/- 0.2 3.0 +/- 0.2 **

Air Filter - SFA2 12/25/17 Gross Beta pCi/m 3 2.7 +/- 0.1 2.8 +/- 0.1 **

Air Filter - SFA3 12/25/17 Gross Beta pCi/m 3 2.8 +/- 0.1 2.8 +/- 0.1 **

Air Filter - SFA4 12/25/17 Gross Beta pCi/m 3 2.7 +/- 0.1 2.6 +/- 0.1 **

Gamma field - DR05 06/27/17 TLD mR/90 days 12.3 +/- 0.7 11.3 +/- 0.4 **

Gamma field - DR06 06/27/17 TLD mR/90 days 10.5 +/- 1.2 9.6 +/- 0.8 **

Gamma field - ORO? 06/27/17 TLD mR/90 days 10.7 +/- 1.0 9.6 +/- 0.8 **

Gamma field - OROS 06/27/17 TLD mR/90 days 14.4 +/- 2.0 13.7 +/- 0.4 **

Gamma field - DR09 06/27/17 TLD mR/90 days 10.7 +/- 0.8 9.9 +/- 0.8 **

Gamma field - DR10 06/27/17 TLD mR/90 days 11.1 +/- 0.8 10.3 +/- 1.1 **

Gamma field - DR11 06/27/17 TLD mR/90 days 11.6 +/- 1.2 10.2 +/- 1.3 **

Gamma field - SFDR14 06/27/17 TLD mR/90 days 29.0 +/- 7.6 24.7 +/- 3.5 **

Gamma field - SFDR15 06/27/17 TLD mR/90 days 26.2 +/- 7.6 23.3 +/- 5.9 **

Gamma field - DR29 06/27/17 TLD mR/90 days 15.7 +/- 0.7 13.5 +/- 1.0 **

Gamma field - DR31 06/27/17 TLD mR/90 days 17.3 +/- 0.8 14.7 +/- 1.4 **

Gamma field - DR05 01/05/18 TLD mR/90 days 12.0+/-1.1 12.4 +/- 1.9 **

Gamma field - DR06 01/05/18 TLD mR/90 days 10.6 +/-1.0 10.8 +/- 1.0 **

Gamma field - ORO? 01/05/18 TLD mR/90 days 10.6 +/- 1.6 12.1 +/- 1.0 **

Gamma field - OROS 01/05/18 TLD mR/90 days 14.7 +/-1 .1 16.0 +/- 1.9 **

Gamma field - DR09 01/05/18 TLD mR/90 days 10.8 +/- 1.2 11 .8 +/- 1.7 **

Gamma field - DR10 01/05/18 TLD mR/90 days 10.5 +/- 1.0 12.0 +/- 1.6 **

Gamma field - DR11 01/05/18 TLD mR/90 days 11 .5 +/- 1.0 12.5 +/- 1.0 **

74

January 1 - December 31, 2017 Docket Nos. 50-317 /50-318/72-8 Table C-2 Results of Quality Assurance Program Sample Type and Type of Original Replicate Split Sample Date Result Units Location Analysis Analysis Analysis Analysis Gamma field - SFDR14 01/05/18 TLD mR/90 days 57.37 +/- 7.1 48.8 +/- 18.0 **

Gamma field - SFDR15 01/05/18 TLD mR/90 days 26.0 +/- 4.3 27.8 +/- 7.1 **

Gamma field - DR29 01/05/18 TLD mR/90 days 14.6 +/- 1.1 16.6 +/- 3.0 **

Gamma field - DR31 01/05/18 TLD mR/90 days 16.0 +/- 0.8 17.8 +/- 0.8 **

1 See discussion at the beginning of the Appendix

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

75

January 1 - December 31, 2017 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 Nuclides pCi/1 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 76

January 1 - December 31, 2017 Docket Nos. 50-317/50-318/72-8 APPENDIX D 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.

Discussion A Land Use Survey was conducted to identify, within a distance of 5 miles, the location of the nearest milk animal, the nearest residence, and the nearest garden greater than 50 m2 in each of the nine sectors over land. A detailed description of the Land Use Survey is given in a separate document (Ref. 9).

There are no animals producing milk for human consumption within the 5 mile radius. Beef cattle are pasture-finished at farm 3.9 miles away that spans the Wand WNW sector boundary.

The position of the nearest residence and garden in each sector out to 5 miles is given in the table below. The nearest garden location has changed in the SSW, SW, WSW, and W, sectors since 2016.

The closest residence is situated in the WSW and SW sectors and the nearest garden is in the WSW sector.

Discussions with a local waterman indicate that oysters are still harvested in the vicinity of CCNPP.

Sector NW WNW w WSW SW SSW s SSE SE Nearest 2.0

2.7 1.3* 1.1 1.1 1.5 1.6 1.6 1.5 Residence (Miles from CCNPP)

Nearest 2.1 2.7 2.0* 1.4* 2.4* 4.3* 1.6 4 .2 1.5 Garden (Miles from CCNPP) 77

January 1 - December 31 , 2017 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.

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 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 three subsurface manholes in 2017. These were identified as Piezometers 11 - 30 on Figure E-1, Site Map Groundwater Monitoring Wells. Figure E-2, Site Map RW Locations, shows precipitation collection sites. 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, only# 11 piezometer, MH28 and MH30 showed any plant-related activity. This activity was previously identified and evaluated in December of 2005 . The activity consists of tritium originating from normal radiological waste discharges and was previously reported in the Annual Radioactive Release Reports. The tritium contamination is contained on site. No drinking water has been affected; the groundwater at this location does not impact any drinking water pathway. The 2017 analysis results for tritium are shown in Table E-11 , and analysis results for gamma emitting radionuclides are shown in Table E-12.

78

January 1 - December 31, 201 7 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 ... .. .... ...... .. ...... ... .......... ...... ........................... ...... .... ..................... ... ..... ...... ..... .80 E-2 Synopsis of 2017 Calvert Cliffs Nuclear Power Plant Non-Tech Spec Radiological Environmental Monitoring Program ................... .......... ............... ... ..... .. .... ........................ 81 E-3 Annual Summary for Calvert Cliffs Nuclear Power Plant Units 1 & 2 Non-Tech Spec Radiological Environmental Monitoring Program ..... ................... .. ............... ... ...... .......... 82 E-4 Concentration of Gamma Emitters in Bottom Sediment ....... ......... ... ....... .. .. ... ... ............ ... 83 E-5 Concentration oflodine-131 in Filtered Air ......... ... .................... .. ....................... .......... ... 84 E-6 Concentration of Beta Emitters in Air Particulates ...... .. ......... .............. ................... ....... ... 86 E-7 Concentration of Gamma Emitters in Air Particulates .... ...... ....... .. .......... .......... .... ........... 88 E-8 Concentration of Tritium and Gamma Emitters in Taylorslsland Well Water ... .. ............. 89 E-9 Direct Radiation ............. ...... ...... ........ ................. ........ ...... ..... .... ...... .. ................ ....... ......... 90 E-10 Direct Radiation from Resin Storage Area ................. ........... .............. ...... ........................ 91 E-11 Concentration of Tritium in Groundwater ... ..... ....................... ........ .... ..... ......................... 92 E-12 Gross Concentration of Gamma Emitters in Groundwater. ..... .... .... ....................... ........... 94 Figure Title Page E-1 Site Map Groundwater Monitoring Wells ............. ........ .... ....... ... ...... .................... ............ 96 E-2 Site Map Rainwater Monitoring Wells ...... ................ .. ........................... ......... .... ..... ........ .97 79

January 1 - December 31, 2017 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 Taylors Island Emergency Siren #35 12.3 7.6 ENE DR29 Taylors Island Emergency 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 OSGDR1 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 RPDR5 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 Uooer 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 Camo Conov/Rockv Point 3.0 1.9 SE WW1 Taylors Island Anderson's Property 12.6 7.8 ENE 1

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

80

January 1 - December 31, 2017 Docket Nos. 50-317 /50-318/72-8 Table E-2 Synopsis of 2017 Calvert Cliffs Nuclear Power Plant Non-Tech Spec Radiological Environmental Monitoring Program Sample Type Sampling Number of Number Analysis Analysis Number Frequency 1 Locations Collected Frequency 1 Analyzed Aquatic Environment Bottom Sediment Q 2 4 Gamma Q 4 Atmospheric Environment Air lodine2 w 7 362 1-131 w 362 Air Particulates3 w 3 155 Gross Beta w 155 Gamma MC 36 Direct Radiation Ambient Radiation Q 20 480 TLD Q 480 Terrestrial Environment Ground water M 11 Gamma M 11 H-3 M 11 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 81

January 1 - December 31, 2017 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 Pathway Sampled Number of Detection (LLD) Locations Mean Highest Annual Mean (F) / Range1 Mean (F)/Range (Unit of Analyses (F)/Range 1 Mean Measurement) Performed Name/Distance &

Direction 2 Aquatic Environment Bottom Sediment Gamma (4) 17 142 (2/2) Discharge Area 142 (2/2)

(pCi/kg) Cs-137 (85-198) WBS2 (85-198) 0.3 km N Atmospheric Environment Air Particulates Gross Beta (155) 0.5 1.9 (104/104) Cambridge CA 1.9 (51/51) 1.8 (51/51)

(10-2 pCi/m 3) . (0.8-3.0) 32.0 km NE (0.8-2.9) (0.9-2.9)

Direct Radiation Ambient Radiation TLD (480) 16.24 (480/480) West Fence Left 27 .84 (24/24)

(mR/90 days) (9.22-51.58) RPDR08 (18.13-51.58) 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.

82

January 1 - December 31 , 2017 Docket Nos. 50-3 17/50-318/72-8 Table E-4 Concentration of Gamma Emitters in Bottom Sediment (Results in units of pCi/kg (dry) +/- 2cr)

Sample Code Sample Date Cs-137 Gamma Emitters WBS2 Discharge Area 6/29/2017 85 +/- 65

10/17/2017 198 +/- 58

WBS4 1 6/29/2017 2

Camp Conoy/ Rocky Point 10/17/2017 2 Control Location 2

This Isotope <MDA

All Non-Natural Gamma Emitters <MDA 83

January 1 - December 31 , 2017 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)

Start Date Stop Date CA LB SFA1 SFA2 1 SFA3 SFA4 Tl 1 Cambridge LONG BEACH MET Station Visitors Center NNW of ISFSI SSE of ISFSI TAYLOR'S ISLAND 1/2/2017 1/9/2017 * * * * * *

1/9/2017 1/16/2017 * * * * * *

1/16/2017 1/23/2017 * * * * * *

1/23/2017 1/30/2017 * * * * * *

1/30/2017 2/6/2017 * * * * * *

2/6/2017 2/13/2017 * * * * * *

2/13/2017 2/20/2017 * * * * * *

2/20/2017 2/27/2017 * * * * * *

2/27/2017 3/6/2017 * * * * * *

3/6/2017 3/13/2017 * * * * * *

3/13/2017 3/20/2017 * * * * * *

3/20/2017 3/27/2017 * * * * * *

3/27/2017 4/3/2017 * * * * * *

4/3/2017 4/10/2017 * * * * * *

4/10/2017 4/17/2017 * * * * * *

4/17/2017 4/24/2017 * * * * * *

4/24/2017 5/1/2017 * * * * * *

5/1/2017 5/8/2017 * * * * * *

5/8/2017 5/15/2017 * * * * * *

5/15/2017 5/22/2017 * * * * * *

5/22/2017 5/29/2017 * * * * * *

5/29/2017 6/5/2017 * * * * * *

6/5/2017 6/12/2017 * * * * * *

6/12/2017 6/19/2017 * * * * * *

6/19/2017 6/26/2017 * * * * * *

6/26/2017 7/3/2017 * * * * * *

84

January 1 - December 31, 2017 Docket Nos. 50-317 /50-318/72-8 Table E-5 Concentration of lodine-131 in Filtered Air (Results in units of 10-3 pCi/m3 +/- 2cr)

Start Date Stop Date CA LB SFA1 SFA2 1 SFA3 SFA4 Tl 1 Cambridge LONG BEACH MET Station Visitors Center NNW of ISFSI SSE of ISFSI TAYLOR'S ISLAND 7/3/2017 7/10/2017 * * * * * *

7/10/2017 7/17/2017 * * * * * *

7/17/2017 7/24/2017 * * * * * *

7/24/2017 7/31/2017 * * * * * *

7/31/2017 8/7/2017 * * * * * *

8/7/2017 8/14/2017 * * * * * *

3 8/14/2017 8/21/2017 * * * * *

8/21/2017 8/28/2017 * * * * * *

8/28/2017 9/4/2017 * * * * * *

9/4/2017 9/11/2017 * * * * * *

9/11/2017 9/18/2017 * * * * * *

9/18/2017 9/25/2017 * * * * * *

9/25/2017 10/2/2017 * * * * * *

10/2/2017 10/9/2017 * * * * * *

10/9/2017 10/16/2017 * * * * * *

10/16/2017 10/23/2017 * * * * * *

10/23/2017 10/30/2017 * * * * * *

10/30/2017 11/6/2017 * * * * * *

11/6/2017 11/13/2017 * * * * * *

11/13/2017 11/20/2017 * * * * * *

11/20/2017 11/27/2017 * * * * * *

11/27/2017 12/4/2017 * * * * * *

12/4/2017 12/11/2017 * * * * * *

2 12/11/2017 12/18/2017 * * * * *

12/18/2017 12/25/2017 * * * * * *

12/25/2017 1/1/2018 * * * * * *

Control Location 2

Power outage 3

Sampler malfunction/low flow

<MDA 85

January 1 - December 31 , 2017 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 1/2/2017 1/9/2017 2.0 +/- 0.2 2.0 +/- 0.2 1.8 +/- 0.2 1/9/2017 1/16/2017 2.0 +/- 0.1 1.9 +/- 0.1 1.9 +/- 0.1 1/16/2017 1/23/2017 1.4 +/- 0.1 1.3 +/- 0.1 1.1 +/- 0.1 1/23/2017 1/30/2017 1.5+/-0.1 1.4 +/- 0.1 1.3 +/- 0.1 1/30/2017 2/6/2017 2.1 +/-0.1 2.4 +/- 0.2 2.1 +/- 0.1 2/6/2017 2/13/2017 2.6 +/- 0.1 2.7 +/- 0.1 2.4 +/- 0.1 2/13/2017 2/20/2017 2.1 +/- 0.1 2.1 +/- 0.1 1.9 +/- 0.1 2/20/2017 2/27/2017 1.3+/-0.1 1.3 +/- 0.1 1.3 +/- 0.1 2/27/2017 3/6/2017 1.a +1- 0.1 1.7+/-0 .1 1.5 +/- 0.1 3/6/2017 3/13/2017 1.5 +/- 0.1 1.4 +/- 0.1 1.4 +/- 0.1 3/13/2017 3/20/2017 1.7+/-0.1 1.6 +/- 0.1 1.5 +/- 0.1 3/20/2017 3/27/2017 1.9 +/- 0.1 1.9 +/- 0.1 1.9 +/- 0.1 3/27/2017 4/3/2017 1.1 +/- 0.1 1.1 +/- 0.1 1.0 +/- 0.1 4/3/2017 4/10/2017 1.2 +/- 0.1 1.3 +/- 0.1 1.2 +/- 0.1 4/10/2017 4/17/2017 1.5 +/- 0.1 1.7 +/- 0.1 1.3 +/- 0.1 4/17/2017 4/24/2017 1.1 +/-0.1 1.0 +/- 0.1 1.0 +/- 0.1 4/24/2017 5/1/2017 1.3 +/- 0.1 1.4 +/- 0.1 1.3 +/- 0.1 5/1/2017 5/8/2017 0.8 +/- 0.1 0.8 +/- 0.1 0.9 +/- 0.1 5/8/2017 5/15/2017 1.0 +/- 0.1 1.1 +/-0.1 1.4 +/- 0.1 5/15/2017 5/22/2017 2.1 +/- 0.1 1.8 +/- 0.1 2.0 +/- 0.1 5/22/2017 5/29/2017 0.8 +/- 0.1 0.9 +/- 0.1 0.9 +/- 0.1 5/29/2017 6/5/2017 1.9 +/- 0.1 1.8 +/- 0.1 1.8 +/- 0.1 6/5/2017 6/12/2017 2.1 +/- 0.1 2.3 +/- 0.1 2.2 +/- 0.1 6/12/2017 6/19/2017 1.5 +/- 0.1 1.5 +/- 0.1 1.5 +/- 0.1 6/19/2017 6/26/2017 2.3 +/- 0.1 2.0 +/- 0.1 2.0 +/- 0.1 6/26/2017 7/3/2017 2.0 +/- 0.1 2.1 +/- 0.2 2.0 +/- 0.1 7/3/2017 7/10/2017 2.4 +/- 0.1 2.3 +/- 0.1 2.4 +/- 0.1 7/10/2017 7/17/2017 2.2 +/- 0.1 2.3 +/- 0.1 2.4 +/- 0.1 7/17/2017 7/24/2017 2.6 +/- 0.1 2.5 +/- 0.1 2.5 +/- 0.1 7/24/2017 7/31/2017 1.6 +/- 0.1 1.5 +/- 0.1 1.6 +/- 0.1 7/31/2017 8/7/2017 1.9 +/- 0.1 1.8 +/- 0.1 1.8 +/- 0.1 8/7/2017 8/14/2017 2.1 +/-0 .1 1.8 +/- 0.1 1.9 +/- 0.1 8/14/2017 2 8/21/2017 2.5 +/- 0.2 2.4 +/- 0.2 8/21/2017 8/28/2017 1.9 +/- 0.1 1.7 +/- 0.1 1.9 +/- 0.1 8/28/2017 . 9/4/2017 1.9 +/- 0.1 1.7 +I- 0.1 1.8 +/- 0.1 9/4/2017 9/11/2017 1.8 +/- 0.1 1.7+/-0.1 1.7 +/- 0.1 9/11/2017 9/18/2017 2.0 +/- 0.1 2.1 +/- 0.1 1.9 +/- 0.1 9/18/2017 9/25/2017 2.7+/-0.1 2.6 +/- 0.1 2.5 +/- 0.1 9/25/2017 10/2/2017 1.5 +/- 0.1 1.5 +/- 0.1 1.5 +/- 0.1 86

January 1 - December 31, 2017 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 10/2/2017 10/9/2017 1.7+/-0.1 1.6 +/- 0.1 1.6+/-0.1 10/9/2017 10/16/2017 1.1 +/- 0.1 1.1 +/-0.1 1.1 +/-0.1 10/16/2017 10/23/2017 2.4 +/- 0.1 2.5 +/- 0.1 2.3 +/- 0.1 10/23/2017 10/30/2017 1.7+/-0.1 1.7 +/- 0.1 1.6 +/- 0.1 10/30/2017 11/6/2017 2.6 +/- 0.1 2.3 +/- 0.1 2.4 +/- 0.1 11/6/2017 11/13/2017 1.8 +/- 0.1 1.6 +/- 0.1 1.7+/-0.1 11/13/2017 11/20/2017 2.4 +/- 0.2 2.5 +/- 0.2 2.6 +/- 0.2 11/20/2017 11/27/2017 2.3 +/- 0.1 2.4 +/- 0.1 2.4 +/- 0.1 11/27/2017 12/4/2017 2.9 +/- 0.1 3.0 +/- 0.1 2.9 +/- 0.1 12/4/2017 12/11/2017 2.6 +/- 0.2 2.6 +/- 0.2 2.4 +/- 0.2 12/11/2017 12/18/2017 2.8 +/- 0.1 2.9 +/- 0.1 2.9 +/- 0.1 12/18/2017 12/25/2017 2.7 +/- 0.1 2.5 +/- 0.1 2.8 +/- 0.1 12/25/2017 1/1/2018 2.8 +/- 0.2 2.4 +/- 0.1 2.8 +/- 0.2 Control Location 2

Sampler Malfunction; Loss of Data 87

January 1 - December 31, 2017 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)

Sample Date CA LB Tl 1 Cambridge LONG BEACH TAYLOR'S ISLAND 1/30/2017 * *

2/27/2017 * *

4/3/2017 * *

5/1/2017 * *

5/29/2017 * *

7/3/2017 * *

7/31/2017 * *

8/29/2017 * *

10/2/2017 * *

10/30/2017 * *

11/28/2017 * *

1/2/2018 * *

Control Location

All Non-Natural Gamma Emitters <MDA 88

January 1 - December 31 , 2017 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 H-3 1/31/2017 * <186 2/21/2017 * <182 3/20/2017 * <182 5/16/2017 * <186 6/14/2017 * <184 7/10/2017 * <165 8/15/2017 * <171 9/19/2017 * <167 10/23/2017 * <197 11/7/2017 * <197 12/11/2017 * <191

Non-Natural Gamma Emitters <MDA 89

January 1 - December 31 , 2017 Docket Nos. 50-317/50-318/72-8 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 . 10.91 +/- 0.91 11 .75 +/- 0.42 11 .70 +/- 1.08 12.09 +/- 1.02 DR25 Camp Conoy Guard 12.00 +/- 0.76 13.71 +/- 0.93 12.92 +/- 1.16 14.16 +/- 1.30 House DR26 Rt. 235 and Clark's 10.03 +/- 1.04 12.29 +/- 0.81 11 .12 +/- 0.75 11 .16+/- 0.90 Landing Road DR27 Rt. 231 and Rt. 4 11 .03 +/- 0.37 12.05 +/- 0.65 11.21 +/- 0.80 11.96 +/- 1.02 DR28 Taylors Is. Siren #35 12.42 +/- 0.53 15.08 +/- 0.94 13.37 +/- 1.07 14.86 +/- 1.61 DR29 Taylors Is. Siren #38 12.80 +/- 0.96 15.72 +/- 0.72 13.39 +/- 1.32 14.65+/- 1.11 DR31 Cambridge 14.17 +/- 0.96 17.29 +/- 0.83 15.36 +/- 0.56 16.04 +/- 0.85 DR32 Twining Property, 13.97 +/- 0.91 16.36 +/- 0.59 15.58 +/- 1.63 16.93 +/- 0.42 Taylors Island DR33 P. A. Ransome Property 13.93 +/- 1.07 16.30 +/- 0.74 14.35 +/- 0.73 15.67 +/- 1.01 DR34 Shoreline at Barge Rd. 9.22 +/- 0.97 10.13 +/- 0.72 9.23 +/- 0.97 10.64 +/- 1.69 OSG1 North of Old Steam 15.37 +/- 2.18 19.04 +/- 1.92 16.85 +/- 1.86 18.23 +/- 1.53 Generator Storage Facility OSG2 West of Old Steam 13.11 +/- 1.09 16.48+/- 1.41 14.63 +/- 1.80 15.82 +/- 2.01 Generator Storage Facilit 90

January 1 - December 31 , 2017 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 22.32 +/- 2.83 25.77 +/- 3.16 24.03 +/- 1.95 26.93 +/- 2.27 RPDR06 North Fence Upper 12.42 +/- 1.38 15.66 +/- 1.90 21.98 +/- 2.65 24.39 +/- 2.42 RPDR07 West Fence Right 17.25 +/- 1.22 16.95 +/- 1.65 17.10 +/- 1.60 18.46 +/- 2.16 RPDR08 West Fence Left 19.27 +/- 1.83 51.58 +/- 1.54 22.39 +/- 0.87 18.13 +/- 1.83 RPDR09 South Fence Upper 15.32 +/- 0.97 28.87 +/- 2.03 15.24 +/- 1.30 15.04 +/- 1.41 RPDR10 South Fence Lower 15.95 +/- 0.82 21 .30 +/- 1.59 16.27 +/- 0.93 16.85 +/- 1.97 RPDR11 East Fence Left 18.91 +/- 0.71 23.99 +/- 2.74 19.80 +/- 0.75 16.81 +/- 2.02 RPDR12 East Fence Right 14.10 +/- 2.24 17.72+/- 1.58 15.44 +/- 1.25 15.54 +/- 0.82 91

January 1 - December 31, 2017 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 Date 11 12 13 15 18 19 20 21 22 23 24 25 26 27 28 29 30 01/31/2017 1740+/-89.3 # # # ND # # # # ND # # ND ND ND # #

05/01/2017 ND ND ND ND ND ND ND ND ND ND ND ND # # ND ND ND 05/02/2017 ND # # # ND # ND ND ND # # # ND ND # # #

05/03/2017 473+/-140 ND ND ND ND ND # # # ND ND ND ND ND ND ND ND 07/31/2017 ND ND ND ND ND # # # # ND ND ND ND ND ND ND ND 08/01/2017 1810+/-481 # # # ND ND ND ND ND ND # # ND ND ND # #

09/20/2017 931+/-160 # ND ND ND ND ND ND ND ND ND ND ND ND ND # #

10/23/2017 663+/-61 .1 ND ND ND ND # # # # ND ND # ND ND ND ND ND 10/24/2017 1980+/-254 # # # ND ND ND ND ND ND # ND ND ND ND # #

11/29/2017 2380+/-302 # ND ND ND ND ND ND ND ND ND ND ND ND ND # # ND Tritium Less than minimum Detectable Activity(<MDA)

ND No Data - Quarterly sample obtained as required.

92

January 1 - December 31 , 2017 Docket Nos. 50-317/50-318/72-8 Table E-11 (Continued)

Concentration of Tritium in Surface Water, Precipitation, and Subsurface Drainage (Results in units of pCi/L +/- 2cr)

Sample Date MH24 MH28 MH30 RW1 RW2 RW3 RW4 SW003 SW004 01/31/2017 # ND ND ND ND ND ND ND ND 02/01/2017 ND 2940+/-118 2340+/-939 ND ND ND ND # #

03/20/2017 ND ND ND # # # # ND ND 05/02/2017 # ND ND ND ND ND ND ND ND 05/09/2017 ND 2350 +/-283 4330+/-478 ND ND ND ND ND ND 08/01/2017 ND 2330+/-492 3190+/-378 ND ND ND ND ND ND 11/16/2017 ND 4490+/-502 2960+/-351 ND ND ND ND ND ND Tritium Less than minimum Detectable Activity{<MDA)

ND No Data - Quarterly sample obtained as required.

93

January 1 -December 31 , 2017 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 Date 11 12 13 15 18 19 20 21 22 23 24 25 26 27 28 29 30 05/01/2017 ND ND ND ND ND ND ND ND ND ND ND ND *

ND ND ND 05/02/2017 ND * *

ND

ND ND ND * *

ND ND * *

05/03/2017

ND ND ND ND ND * *

ND ND ND ND ND ND ND ND 10/24/2017

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.

94

January 1 - December 31 , 2017 Docket Nos. 50-317/50-318/72-8 Table E-12 ( CONTINUED )

Gross Concentration of Gamma Emitters in Surface Water, Precipitation, and Subsurface Drainage (Results in units of pCi/L +/- 2cr)

Sample Date MH24 MH28 MH30 RW1 RW2 RW3 RW4 SW003 SW004 05/02/2017

ND ND ND ND ND ND *

05/09/2017 ND *

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

95

January 1 - December 31 , 2017 Docket Nos. 50-317/50-318/72-8 Figure E-1 Site Map Groundwater Monitoring Wells PUZ

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Figure 1 ROPP Mom!Qnng locations Olltlfturden AqUifer e efclrl Conx,ral!OO Clil\/811 C~lls Gener.iting Stll ion 96

January 1 - December 31, 2017 Docket Nos. 50-317/50-318/72-8 Figure E-2 Site Map Rainwater Locations 97

January 1 - December 31, 2017 Docket Nos. 50-317/50-318/72-8 APPENDIXF Errata for 2016 AREOR Report This Appendix is provided as errata to the Program Exception in Section II.B.4 of the 2016 Annual Radiological Environmental Operating Report (AREOR) dated May 15, 2017.

In the 2016 AREOR, Program Exceptions for REMP were provided in Appendix B, Analysis Results for tl).e REMP and ISFSI. To correct the 2016 AREOR report {or the REMP, this appendix is provided as errata. Program exceptions were discussed in II.B.4 but did not include an exception for analysis of Tritium performed outside the quarterly requirement. The section should also include the following:

A program exception for the 2016 operating period was noted and entered into the site Corrective Action Program for the analysis frequency of water samples collected quarterly as required but not analyzed for Tritium until the end of the year. Although this hold time is consistent with EPA method requirements for analyzing Tritium in Drinking water, it is not in compliance with the CCNPP ODCM Table 3.12-1 requirements for analysis frequency. Site personnel did not ensure the analyses were being performed at the specified frequency by the vendor. To prevent a recurrence, site personnel track the required sampling and analyses for REMP and perform quarterly reviews. Water samples for Tritium were analyzed quarterly as required -in 2017.

98

ML18136A551

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