Text

Submittal of 2016 Annual Radiological Environmental Operating Report
	ML17095A970
Person / Time
Site:	Crystal River
Issue date:	04/05/2017
From:	Hobbs T; Duke Energy Florida
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	3F0417-02
	Download: ML17095A970 (86)
	v • d • e

J_~ DUKE

~ ENERGY April 5, 2017 3F0417-02 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001 Crystal River Nuclear Plant 15760 W. Power Line Street Crystal River, FL 34428 Docket 50-302 Docket 72-1035 Operating License No. DPR-72 POTS 5.7.1.1(b)

ODCM 6.5

Subject:

Crystal River Unit 3 - 2016 Annual Radiological Environmental Operating Report

Dear Sir:

Duke Energy Flprida, LLC (DEF), hereby provides the 2016 Annual Radiological Environmental Operating Report for Crystal River Unit 3 (CR-3) in accordance with the CR-3 Permanently Defueled Technical Specifications (POTS), Section 5.7.1.1 (b) and Section 6.5 of the Offsite Dose Calculation Manual (ODCM). The data provided in the attached report is consistent with the objectives outlined in the ODCM and includes all radiological environmental samples taken during the report period from January 1, 2016 through December 31, 2016.

No new regulatory commitments are made in this letter.

If you have any questions regarding this submittal, please contact Mr. Mark Van Sicklen, Licensing Lead, Nuclear Regulatory Affairs, at (352) 563-4795.

sinr r*ly, J Ul Terry~bs General Manager, Decommissioning TDH/mvs : 2016 Annual Radiological Environmental Operating Report xc:

NMSS Project Manager Regional Administrator, Region I

DUKE ENERGY FLORIDA, LLC DOCKET NUMBER 50 - 302 / LICENSE NUMBER DPR - 72 ATTACHMENT1 2016 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT

ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT 2016 DUKE ENERGY FLORIDA, LLC CRYSTAL RIVER UNIT 3 Prepared By: Chuck Burtoff 03/01/2017 Lead Scientist

i TABLE OF CONTENTS Introduction............................................................................................................ ii I.

Summary Description of the Radiological Environmental Monitoring Program................................................................................................ 1 II.

Land-Use Census................................................................................................ 11 III.

Interlaboratory Comparison Program................................................................... 12 IV.

Analytical Results................................................................................................. 14 A. Airborne Pathway.......................................................................................... 14 Statistical Summary....................................................................................... 15 B. Direct Radiation............................................................................................. 22 Statistical Summary....................................................................................... 23 C. Waterborne Pathway..................................................................................... 26

1. Seawater................................................................................................. 26 Statistical Summary................................................................................ 29

2. Ground Water.......................................................................................... 26 Statistical Summary................................................................................ 36

3. Site Ground Water.................................................................................. 26 Statistical Summary................................................................................ 55

4. Site Ground Water Non-REMP.............................................................. 27 Statistical Summary................................................................................ 56

5. Drinking Water........................................................................................ 27 Statistical Summary................................................................................ 60

6. Shoreline Sediment................................................................................. 27 Statistical Summary................................................................................ 63

7. Site Settling Ponds................................................................................. 28 Site Settling Pond Supplemental Data.................................................... 66

8. NEI 07-07 Evaluation............................................................................. 28 D. Ingestion Pathway......................................................................................... 67

1. Carnivorous Fish..................................................................................... 67 Statistical Summary................................................................................ 70

2. Oysters.................................................................................................... 67 Statistical Summary................................................................................ 73

3. Broad Leaf Vegetation............................................................................ 68 Statistical Summary................................................................................ 76

4. Watermelon and Citrus........................................................................... 69 Statistical Summary................................................................................ 80

ii INTRODUCTION This report is submitted as required by Technical Specification 5.7.1.1(b) to the Crystal River Facility Operating License No. DPR-72, and Section 6.6 of the Offsite Dose Calculation Manual.

The following information is required to be included in this report:

- Data Summaries

- Interpretations

- Unachievable LLDs

- An analysis of trends

- An assessment of any observed impact of plant operation on the environment NOTE:

If harmful effects or evidence of irreversible damage are detected by the monitoring, the report shall provide an analysis of the problem and a planned course of action to correct it.

- Summarized and tabulated results of all radiological environmental samples taken during the report period, in the format of Radiological Assessment Branch Technical Position, Revision 1, November, 1979.

NOTE:

If some results are not available for inclusion, the report shall note and explain the reason for the missing results. The missing results shall be submitted as soon as possible in a supplementary report.

- A summary description of the Radiological Environmental Monitoring Program.

- A map of all sampling locations keyed to a table giving distances and directions from the reactor.

- Land-use census results.

- Interlaboratory Comparison Program results.

- A discussion of airborne sample station availability.

- Results of any unplanned release or spill of radioactive material that could have the potential to contaminate the groundwater as reported to maintain compliance with the groundwater protection initiative (NEI 07-07).

Additional Information On February 5, 2013, Duke Energy announced that a decision had been made to permanently retire Crystal River Unit 3. The decision was made due to the risk associated with repairing the containment buildings delaminated concrete wall. The company intends to place the facility in SAFSTOR for the immediate future until eventual decommissioning. The plant staff (called SAFSTOR organization) is now mainly working to abandon unneeded plant systems and transfer the spent fuel into dry storage to an Independent Spent Fuel Storage Installation (ISFSI) that is currently being built on site.

1 I.

SUMMARY

DESCRIPTION OF THE RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM The analytical results of the Crystal River Unit 3 (CR-3) operational Radiological Environmental Monitoring Program (REMP) for 2016 are contained in this report. The operational program began on January 1, 1977 just prior to initial criticality, which was achieved on January 14, 1977.

Sampling of the facility environs is performed by the State of Florida Department of Health, Bureau of Radiation Control. The State also performs the required analyses, participates in the Interlaboratory Comparison Program, and performs the annual land-use census. Prior to 1990, the program was split between the Department of Health and the University of Florida. The transition to the State performing all of the programs sampling and analyses in 1990 is evident in several of the trend graphs, most notably oysters and carnivorous fish, and is due to the State using less sensitive measurement techniques for several of the pathways which were formerly evaluated by the University of Florida.

Sample station locations are given in Table I-1 and Figures I-2, I-3, I-4, and I-5. Sample frequency and analysis type may be determined from Table I-2. Figure I-1 illustrates the relevant exposure pathways. Regarding waterborne pathways, the groundwater area of the Crystal River site is too saline to be used as a source of drinking water, hence there is no credible drinking water uptake pathway. Additionally, the Florida aquifer groundwater flows in a west-southwest direction across the site toward the Gulf of Mexico, and since the locale of the site is along the coast, there is no downstream public impact regarding groundwater.

Except for air sample gross beta results and direct radiation measurements, most of the analytical results are below the lower limit of detection (LLD) of the sample. Sample LLDs are generally much lower than the required "a priori" LLD listed in the ODCM. When measurable results are reported, the values are also usually less than the required "a priori" LLD.

In 2011 there were positively measured results of iodine and cesium airborne concentrations during the period of March 22 through April 12th for almost all sampling stations including the control station. These measurements are a direct result of the earthquake and tsunami event at the Dai-Ichi, Fukushima nuclear plants following the March 11, 2011 Tohoku event in Japan. These measurements are not related to Crystal River Unit 3 activities. The Japanese event also affected broad leaf vegetation sample media throughout the year as long-lived radionuclides (Cs-137) were released at Fukushima multiple times. The vegetation measurements in 2016 are still affected by the Fukushima event due to the long-lived radionuclides deposited. The vegetation control sample station located in Orlando, Fl. is also experiencing similar Cs-137 deposition on the broad leaf sample media.

The results of the 2016 REMP have been compared to previous years' results. This comparison, in part illustrated by the trend graphs of Section IV, shows no evidence of consistent long-term increasing trends in any of the sample media. However, radioactive material is routinely quantified in sediment samples which are taken in the discharge canal near the liquid release discharge point. In general, these results verify the effectiveness of in-plant measures for controlling radioactive releases.

Trend graphs illustrate the mean measured concentration of a particular radionuclide for the year. When measurable results are not obtained, the highest sample LLD is plotted. LLD and measured values are plotted on the same line to best illustrate any trend. As shown on each graph's legend, any measured value is noted by a text box, unless all values trended are measured values for that particular parameter.

Statistical summary pages are provided for each medium or pathway. Measured values are reported in terms of a mean and range. In addition, the number of measured values versus samples obtained is reported. For example, in the following entry; 15 (249/256)

(4 - 35) the "All Indicator Locations" column would be interpreted as indicating a mean measured value of 15, with measured values ranging from 4 to 35. (249/256) means that out of 256 samples, 249 were measured values.

2 TABLE I-1 DUKE ENERGY FLORIDA, LLC - CR3 - 2016 SAMPLE STATION LOCATIONS SAMPLE MEDIA STATION ID DIRECTION APPROX. DISTANCE (Miles)

TLD - on-site C60 N

0.88 C61 NNE 0.92 C62 NE 1.17 C63 ENE 0.87 C64 E

0.80 C65 ESE 0.33 C66 SE 0.36 C67 SSE 0.33 C68 S

0.27 C69 SSW 0.31 C41 SW 0.43 C70 WSW 0.74 C71 WNW 0.58 C72 NW 0.30 C73 NNW 0.74 C27 W

0.41 TLD - off-site C18 N

5.3 C03 NNE 4.89 C04 NE 5.95 C74 ENE 5.13 C75 E

3.99 C76 ESE 5.61 C08 SE 5.66 C77 SSE 3.39 C09 S

3.23 C78 WSW 4.59 C14G W

2.53 C01 NW 4.8 C79 NNW 4.97 C47-Control ESE 78 C07*

ESE 7.67 C40*

E 3.48 C46*

N 0.37

TLDs not required by ODCM. Deployed at air sample locations.

3 TABLE I-1 (CONT'D)

DUKE ENERGY FLORIDA, LLC-CR3 - 2016 SAMPLE STATION LOCATIONS SAMPLE MEDIA STATION ID DIRECTION DISTANCE (Miles)

AIR C07 ESE 7.7 C18 N

5.3 C40 E

3.5 C41 SW 0.4 C46 N

0.4 C47-Control ESE 78 SEAWATER C14H NW 0.1 C14G W

2.5 C13-Control WSW 4.6 GROUND WATER SITE GROUND WATER C40-Control CR3-2 CR3-4 CR3-5 CR3-6S CR3-6D CR3-7 CR3-8 CR3-9 CR3-10 E

E SSE SSW W

W WNW WNW NW NNE 3.6 0.1 0.086 0.051 0.038 0.038 0.060 0.073 0.1 0.1 DRINKING WATER C07-Control ESE 7.4 C10-Control ESE 6.0 C18-Control N

5.3 SHORELINE SEDIMENT C09-Control S

3.2 C14H NW 0.1 C14M W

1.2 C14G W

2.5 FISH & OYSTERS C29 W

2.5 C30-Control WSW 3.4 BROAD LEAF VEGETATION C48A N

0.4 C48B ENE 0.9 C47-Control ESE 78 WATERMELON C04 NE 6.0 CITRUS C19 ENE 9.6

4 TABLE I-2 DUKE ENERGY FLORIDA, LLC-CR3 - 2016 SAMPLING AND ANALYSIS PROGRAM SAMPLE MEDIA

OF STATIONS FREQUENCY ANALYSIS LLD1 TLD 33*

Quarterly Dose Air Particulate 6

Weekly Gross 0.01 pCi/m3 Quarterly Spec :

Cs-134 0.05e Cs-137 0.06e Seawater 3

Monthly Tritium 2000b pCi/L Monthly Spec :

Mn-54 15 Fe-59 30 Co-58 15 Co-60 15 Zn-65 30 Zr-Nb-95 15c Cs-134 15 Cs-137 18 Ba-La-140 15c Ground Water 1

Semiannual Tritium 2000b pCi/L Semiannual Spec :

2 2

Site Ground Water6 Drinking Water 9

3 Quarterly Quarterly Quarterly Tritium Spec :

Tritium 2

2000b pCi/L 2

2000b pCi/L Quarterly Spec :

2 2

Shoreline Sediment 4

Semiannual Spec :

Cs-134 150 pCi/kg Cs-137 180

Includes 3 stations which are not required by the ODCM 1The maximum "a priori" LLD 2Same as Seawater Spec 6Additional 2 stations reported that are not required by the ODCM bLLD for drinking water. If no drinking water pathway exists, a value of 3000 pCi/L may be used cThe specified LLD is for an equilibrium mixture of parent and daughter nuclides which contain 15 pCi/L of the parent nuclide eLLDs apply only to quarterly composite gamma spectral analysis, not to analyses of single particulate filters

5 TABLE I-2 (Cont'd)

DUKE ENERGY FLORIDA, LLC-CR3 - 2016 SAMPLING AND ANALYSIS PROGRAM SAMPLE MEDIA

OF STATIONS FREQUENCY ANALYSIS LLD1 Carnivorous Fish 2

Quarterly Spec :

Mn-54 130 pCi/kg and Oysters Fe-59 260 Co-58 130 Co-60 130 Zn-65 260 Cs-134 130 Cs-137 150 Broad Leaf Vegetation 3

Monthly3 Spec :

Cs-134 60 Cs-137 80 Watermelon 1

Annual4 Spec :

5 5

Citrus 1

Annual4 Spec :

5 5

1The maximum "a priori" LLD 3When available 4During harvest 5Same as broad leaf vegetation

6 Airborne Releases Liquid Releases Air External Radiation Seawater Ground Water Sediments Drinking Water Aquatic Animals Food Crops Man FIGURE I-1: Environmental Media and Exposure Pathways Air Ground Water Drinking Water Food Crops External Radiation Sediments Aquatic Animals Seawater Man

LAKE ROUSSEAU WITHLACOOCHEE RIVER C19 DE PROPERTY LINE C40 C29 C13 C30 C09 KING'S BAY FIGURE 1-2: Environmental Monitoring Sample Stations (non-TLDs) 7

'T1 -

0 c:

~ -'

VJ g1

=;*

0

~

!a HELPER COOLING TOWERS

~

ASH STORAGE AREA

~

00 ~-

0

>; s*

(IQ o-3 b DISCHARGE CANAL b

('")

~

s*

1:1 ASH STORAGE AREA Cl>

0 1:1 i;.t:.

c; INTAKE CANAL C69 C60 UNITS 1, 2. & 3 SUBSTATION 8

ASH STORAGE AREA COAL STORAGE AREA MAIN P C62 C63 LANT ACCESS ROAD C64

C18 C03 C04 C74 DE PROPERTY LINE C40 C14G C78 C09 C08 KING'S BAY FIGURE 1-4: Environmental Monitoring TLD Locations (off site) 9

Figure 1-5: CR3 Groundwater M'onitoring Well Locations Deep Wells Are Also Installed at #'s 1, 3, 6 10

11 II. LAND-USE CENSUS A 2016 land-use census was conducted during June through July. The purpose of this census is to identify the nearest residences, vegetable gardens, and potential milk-producing animals within a five mile radius of the nuclear plant. The distance in miles and bearing in degrees for each receptor type in each of the sixteen sectors is summarized below. There were no significant changes compared to 2015 other than a garden was identified at 4.4 miles at 57 degrees in 2016 whereas no gardens within 5 miles were identified in 2015.

SECTOR NEAREST RESIDENCE NEAREST GARDEN (A)

NEAREST MILK ANIMAL N

4.5 @ 2º NNE 4.6 @ 15º NE 3.8 @ 54º ENE 3.4 @ 57º 4.4 miles at 57º E

2.4 @ 92º ESE 4.2 @ 102º SE 4.9 @ 133º SSE 3.5 @ 149º S

SSW SW WSW W

WNW NW 4.8 @ 321° NNW 4.6 @ 339º (A) - Only gardens with an estimated total area of 500 square feet, or more, and producing green leafy vegetables are considered.

No suitable sites were located within 5 miles.

12 III.

FLORIDA DEPARTMENT OF HEALTH - INTERLABORATORY COMPARISON PROGRAM DATA The EPA crosscheck program ceased operation at the end of 1998. To meet the requirements for a crosscheck program, the Florida Department of Health participates in the Department of Energys Mixed-Analyte Performance Evaluation Program (MAPEP). Overall performance in 2016 was acceptable. The following units are used for each of the four media:

Air Filters:

Bq/sample Soil:

Bq/Kg Vegetation:

Bq/sample Water:

Bq/L Analytical performance is based on historical analytical capabilities for individual analyte/matrix pairs.

Acceptable performance is designated by an "A".

Acceptable with warning is designated by a "W".

Performance which is not acceptable is designated by an "N".

Results for July 2016:

Media Nuclide Result

% Bias Acceptance Range Flag Air Cs-137 2.396 4.2 1.61-2.99 A

Air Co-57 2.736

-6.9 2.06-3.82 A

Air Zn-65 4.062 13.8 2.50-4.64 A

Air Co-60 4.118 2.4 2.81-5.23 A

Air Mn-54 4.828 6.6 3.17-5.89 A

Soil Cs-134 1020.09

-1.0 721-1339 A

Soil Co-57 1003.17 1.1 694-1290 A

Soil Co-60 1186.67

-0.3 833-1547 A

Soil Mn-54 1195.00 3.0 812-1508 A

Soil Zn-65 739.00 6.8 484-900 A

Vegetation Co-57 10.580

-10.3 8.3-15.3 A

Vegetation Cs-137 5.518

-1.8 3.93-7.31 A

Vegetation Cs-134 9.258

-12.8 7.43-13.81 A

Vegetation Zn-65 8.832

-8.0 6.7-12.5 A

Water Mn-54 11.97 7.8 7.8-14.4 A

Water Zn-65 15.52 14.1 9.5-17.7 A

Water Cs-134 16.11 0.1 11.3-20.9 A

Water Cs-137 23.06 8.8 14.8-27.6 A

Water Co-60 12.64 7.2 8.3-15.3 A

13 FLORIDA DEPARTMENT OF HEALTH - INTERLABORATORY COMPARISON PROGRAM DATA (contd)

Results for December 2016:

Media Nuclide Result

% Bias Acceptance Range Flag Air Cs-134 1.963

-3.8 1.43-2.65 A

Air Cs-137 1.850 3.9 1.25-2.31 A

Air Mn-54 2.953 7.4 1.93-3.58 A

Air Co-57 2.396

-3.4 1.74-3.22 A

Air Co-60 3.276 0.5 2.28-4.24 A

Soil Co-57 1190 2.1 833-1547 A

Soil Co-60 872 2.5 596-1106 A

Soil Cs-137 1135 6.4 747-1387 A

Vegetation Co-57 7.233 6.2 4.77-8.85 A

Vegetation Mn-54 7.338 0.9 5.09-9.45 A

Vegetation Zn-65 5.535 2.5 3.78-7.02 A

Vegetation Cs-137 5.675 2.4 3.88-7.20 A

Vegetation Co-60 4.820

-0.8 3.40 - 6.32 A

Water Co-57 25.163

-7.8 19.1-35.5 A

Water Mn-54 15.025 1.5 10.4-19.2 A

Water Zn-65 18.60 6.9 12.2-22.6 A

Water Cs-134 21.953

-8.1 16.7-31.1 A

Water H-3 354.5 6.1 234-434 A

14 IV-A. AIRBORNE PATHWAY Air samples are taken at five locations in the vicinity of the plant. The control location (station C-47) is 78 miles ESE of the plant, at the Department of Health, State Bureau of Radiation Control in Orlando.

Table IV-A.1 provides a statistical summary of the analytical results for 312 gross beta samples.

Tables IV-A.2 and IV-A.3 provide the results for each weekly air sample.

In 2016, 312 particulate samples were analyzed for gross beta activity, and 311 had measurable activity. The average indicator concentration was 19 pCi/1000 m3 with a range of 5 to 81 pCi/1000 m3. In 2015 the average value was 15 pCi/1000 m3. The average indicator concentration since 1996 was in the range of 14 to 24 pCi/1000 m3. The control location concentration for 2016 averaged 16 pCi/1000 m3, with a range of 5 to 29 pCi/1000 m3. The control location in 2015 averaged 13 pCi/1000 m3. Location C40 had the highest yearly indicator concentration at 21 pCi/1000 m3 with a range of 5 to 45 pCi/1000 m3.

Quarterly composite data are summarized in Table IV-A.4. In 2016, measurable quantities of cesium were not identified in any particulate filter sample. The highest cesium LLD was 1.4 pCi/1000 m3 for cesium 137, same as for 2015.

The 2016 airborne sample data is comparable with previous years sample data with exception of samples collected in 2011 during the March and April time frame where airborne particulate and iodine samples were affected by the Fukushima earthquake and tsunami event that occurred on March 11, 2011. Those sample data were thoroughly discussed in the 2011 Annual Radiological Environmental Operating Report submitted for Crystal River Unit 3.

There was two instances of air sampler partial run times as follows. Each was identified during weekly sample changes.

1. In August, station C46 was out of service for 73.4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months out of 177 hours0.00205 days 0.0492 hours 2.926587e-4 weeks 6.73485e-5 months due to a failed air sample pump.

2. In September, due to Hurricane Hermine, five air samples stations (C07, C18, C40, C41 and C46) were each out between 16 and 59.4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months during the week. All were successfully put back in service.

The yearly percentages of down times for the 6 air sample stations were each less than 2%.

The air sample stations down times are documented in the plant Corrective Action Program (CAP) under Condition Reports (CRs) 2051406 (for location C46) and 2060759 (for the 5 locations affected by Hurricane Hermine).

15 TABLE IV-A.1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

CRYSTAL RIVER UNIT 3 DOCKET NO. 50-302 CITRUS COUNTY, FLORIDA JANUARY 1 TO DECEMBER 31, 2016 MEDIUM OR PATHWAY SAMPLED (UNITS)

ANALYSIS AND TOTAL NUMBER OF ANALYSES PERFORMED LOWER LIMIT OF DETECTION (LLD)1 ALL INDICATOR LOCATIONS MEAN RANGE LOCATION WITH HIGHEST MEAN NAME MEAN DISTANCE & BEARING RANGE CONTROL LOCATION MEAN RANGE NUMBER OF NONROUTINE REPORTED MEASUREMENTS AIRBORNE Gross 312 4.0 19 (259/260)

C40 21 (52/52) 16 (52/52) 0 PARTICULATES (5-81) 3.6 @ 90º (5-45)

(5-29)

(pCi/1000m3 for Spec 24 Gross,

pCi/1000m3 for Cs-134 1.8

<LLD

<LLD 0

Spec)

Cs-137 1.4

<LLD

<LLD 0

1The "a priori" LLD which meets or exceeds the requirements of Table 2-9 of the CR-3 ODCM.

16 TABLE IV-A.2 DUKE ENERGY FLORIDA, LLC-CR3 - 2016 pCi/1000m3 GROSS IN AIR SAMPLE SITE Collection Date C07 C18 C40 C41 C46 C47 04-Jan-16 14 17 18 16 15 14 11-Jan-16 15 17 5

12 11 14 19-Jan-16 27 30 25 27 24 20 25-Jan-16 14 17 20 20 15 12 01-Feb-16 16 22 21 20 17 13 09-Feb-16 12 18 16 17 14 14 15-Feb-16 17 14 19 18 15 14 22-Feb-16 13 20 20 16 19 15 29-Feb-16 17 14 19 20 17 26 07-Mar-16 20 12 13 10 10 11 14-Mar-16 15 14 12 14 14 11 21-Mar-16 15 14 17 13 14 11 28-Mar-16 9

18 22 17 19 10 Average:

16 17 17 17 16 14

17 TABLE IV-A.2 (Contd)

DUKE ENERGY FLORIDA, LLC-CR3 - 2016 pCi/1000m3 GROSS IN AIR SAMPLE SITE Collection Date C07 C18 C40 C41 C46 C47 5-Apr-16 16 17 14 17 16 26 11-Apr-16 17 23 20 22 22 19 18-Apr-16 16 13 21 12 11 13 25-Apr-16 15 20 17 19 13 18 02-May-16 23 26 26 25 23 21 09-May-16 21 16 20 22 23 14 16-May-16 24 25 28 23 27 22 24-May-16 13 17 19 18 16 14 31-May-16 23 27 22 26 21 18 07-Jun-16 18 17 18 14 19 14 13-Jun-16 14 14 17 11 12 11 20-Jun-16 24 23 27 21 22 18 28-Jun-16 11 23 19 11 10 11 Average 18 20 21 18 18 17

18 TABLE IV-A.2 (Cont'd)

DUKE ENERGY FLORIDA, LLC-CR3 - 2016 pCi/1000m3 GROSS IN AIR SAMPLE SITE Collection Date C07 C18 C40 C41 C46 C47 05-Jul-16 15 13 17 12 12 14 12-Jul-16 17 16 25 22 17 17 19-Jul-16 11 14 17 12 11 9

26-Jul-16 12 14 21 11 10 14 02-Aug-16 15 23 18 16 17 16 09-Aug-16 11 14 11 13 10 17 16-Aug-16 7

9 9

9 11 10 22-Aug-16 13 11 20 14 10 8

29-Aug-16 12 16 22 13 9

11 06-Sep-16 11 10 11 8

11 12 12-Sep-16 18 23 23 19 17 14 20-Sep-16 9

8 10 8

8 5

28-Sep-16 11 12 14 6

17 11 Average 12 14 17 13 12 12

19 TABLE IV-A.2 (Cont'd)

DUKE ENERGY FLORIDA, LLC-CR3 - 2016 pCi/1000m3 GROSS IN AIR SAMPLE SITE Collection Date C07 C18 C40 C41 C46 C47 04-Oct-16 25 25 24 18 21 10 11-Oct-16 10 11 12 14 12 8

19-Oct-16 14 21 20 16 18 17 25-Oct-16 31

<10 27 21 21 22 01-Nov-16 34 66 39 34 38 26 07-Nov-16 28 33 27 31 40 17 15-Nov-16 25 30 29 29 26 24 21-Nov-16 29 26 35 28 22 29 28-Nov-16 32 37 45 37 27 26 05-Dec-16 22 25 28 33 23 24 13-Dec-16 16 21 20 22 18 17 21-Dec-16 14 11 17 81 11 15 28-Dec-16 23 28 28 18 24 16 Average 23 26 27 29 23 19

20 TABLE IV-A.3 DUKE ENERGY FLORIDA, LLC-CR3 - 2016 pCi/1000m3 EMITTERS IN QUARTERLY COMPOSITES OF AIR PARTICULATES STATION NUCLIDE FIRST QUARTER SECOND QUARTER THIRD QUARTER FOURTH QUARTER C07 Be-7 158 194 176 132 K-40

<16

<30

<14

<16 Cs-134

<1.5

<1.6

<1.1 Cs-137

<1.0

<1.3

<1.1

<1.0 C18 Be-7 168 217 238 130 K-40

<17

<35

<34

<32 Cs-134

<1.2

<1.3

<1.8

<1.3 Cs-137

<1.2

<1.1

<1.4

<1.1 C40 Be-7 158 184 212 166 K-40

<16

<33

<25

<23 Cs-134

<1.4

<1.2

<1.5

<1.3 Cs-137

<0.9

<1.2

<1.4

<1.3 C41 Be-7 167 231 202 130 K-40

<29

<24

<26

<20 Cs-134

<1.5

<1.6

<1.8

<1.4 Cs-137

<1.1

<1.2

<1.4

<1.2 C46 Be-7 130

<51 163 137 K-40

<18

<12

<26

<20 Cs-134

<1.4

<1.5

<1.8

<1.3 Cs-137

<1.1

<1.4

<1.0 C47 Be-7 142

<45 205 131 K-40

<22

<10

<26

<24 Cs-134

<1.2

<1.7

<1.6

<1.3 Cs-137

<1.4

<1.0

<1.1

<1.2

21

`

0.0001 0.001 0.01 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 pCi/m3 Airborne (highest values plotted)

Cs-137 LLD Measured Value 2011 Measured Values due to Fukushima Event

22 IV-B. DIRECT RADIATION Direct radiation measurements (using TLDs) were taken at thirty-three locations surrounding the plant, including one control location 78 miles from the site. 131 out of 132 TLDs were collected during 2016. One TLD from location C79 was not collected during the first quarter as its pole was damaged and the TLD was missing Table IV-B provides a statistical summary of the analytical results for 131 TLDs sampled throughout the year.

Table IV-B.1 provides the results of the individual TLD measurements.

The highest annual average on-site dose was 57 mrem at station C71 (WNW at 3600 feet). Station C71 was relocated in 1992 due to construction of the helper cooling towers on the former site. The new location has a higher background radiation level due to being closer to the storage pond for Units 4 & 5 fly ash, which produces a higher external radiation component than normal levels of natural background. The second highest average on-site dose was 44 mrem at station C65 (ESE at 1743 feet southeast of the coal rail loop). These were the same two locations with the highest dose as in 2015.

The highest annual average off-site dose was 39 mrem at station C40 (east at 3.5 miles). This was also the same location which the highest recorded dose in 2015 at 38 mrem. The control station (C47) average annual dose was 36 mrem in 2016. The average for all stations (except control) was 37 mrem for 2016 versus 32 mrem for 2015.

Direct radiation results in 2016 are similar to previous years; however, the State of Florida replaced the TLDs in 2016 with newer TLDs and new calibration. This likely explains the slightly higher TLD readings on average at the monitoring locations and at the C47 background location in Orlando.

23 TABLE IV-B RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

CRYSTAL RIVER UNIT 3 DOCKET NO. 50-302 CITRUS COUNTY, FLORIDA JANUARY 1 TO DECEMBER 31, 2016 MEDIUM OR PATHWAY SAMPLED (UNITS)

ANALYSIS AND TOTAL NUMBER OF ANALYSES PERFORMED LOWER LIMIT OF DETECTION (LLD)

ALL INDICATOR LOCATIONS MEAN RANGE LOCATION WITH HIGHEST MEAN NAME MEAN DISTANCE & BEARING RANGE CONTROL LOCATION MEAN RANGE NUMBER OF NONROUTINE REPORTED MEASUREMENTS DIRECT RADIATION (mrem/yr)

DOSE, 131 15 37 (127/128)

(24 - 71)

C71 57 (4/4) 0.6 @ 296º (50 - 71) 36 (4/4)

(31 - 43) 0

24 TABLE IV-B.1 DUKE ENERGY FLORIDA, LLC-CR 2016 Annual gamma () Dose (mrem)

TLD STATION Quarter 1

2 3

4 CO1 37 30 25 29 CO3 36 29 25 31 CO4 37 29 26 30 CO7*

35 35 24 27 CO8 35 27 25 27 C09 36 28 24 27 C14G 43 33 30 34 C18 40 29 28 30 C27 51 38 37 39 C40*

50 37 34 37 C41 46 36 36 33 C46*

46 36 33 35 C47 (CONTROL) 43 36 31 34 C60 43 34 31 35 C61 47 37 35 37 C62 50 38 37 40 C63 46 37 35 37 C64 44 35 32 36 C65 54 41 41 41 C66 48 36 34 37 C67 49 39 36 38 C68 49 34 33 37 C69 50 38 36 40 C70 50 38 36 39 C71 71 53 50 55 C72 51 37 34 39 C73 45 34 32 33 C74 36 26 24 28 C75 44 34 32 35 C76 41 30 29 32 C77 42 31 29 33 C78 37 29 28 29 C79 31 29 32

TLDs not required by the ODCM.

- Not collected. Pole damaged.

25 10 100 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 mrem Direct Radiation TLD Average of All Stations See CR 684849

26 IV-C. WATERBORNE PATHWAY To evaluate the waterborne pathway, samples are taken of seawater, ground water, drinking water, and shoreline sediment.

1. Monthly seawater grab samples are taken at two locations in the discharge canal (C14G and C14H) and at one control location (C13) near the mouth of the intake canal. In 2016, of twenty-four indicator samples, none had measurable tritium.

Gamma spectral analysis was performed on all thirty-six samples, (including the 12 control samples) and none of them showed measurable amounts of the gamma emitters of interest.

Table IV-C.1 provides a statistical summary of the seawater tritium and gamma spectroscopy results.

Table IV-C.1.a provides the results of the monthly samples.

2. Semiannual ground water samples are taken at one location, station C40, located approximately 3.5 miles east of CR-3. Gamma spectral and tritium analyses are performed.

In 2016, all results were less than the detection limits. Since plant startup, all results, except for the results of one 1985 tritium analysis, have been less than LLD. The ODCM required sensitivity for measuring tritium in ground water is 2000 pCi/L. Analysis of ground water in the vicinity of CR-3 is done at a sensitivity of approximately 150 pCi/L for tritium and less than 10 pCi/L for select gamma emitters.

Table IV-C.2 provides a statistical summary of the groundwater tritium and gamma spectroscopy results.

Table IV-C.2.a provides the results of the semi-annual samples.

3. Quarterly site ground water samples are taken at thirteen locations surrounding the perimeter of the CR-3 protected area. Periodically five of these ground water wells have shown indications of very low levels of tritium on the west-southwest side of the plant. It is believed that this tritium is the result of a leak in the Station Drain Tank (SDT-1) to the settling pond discharge line that occurred in 1998. This discharge line has recently been leak tested and it is leak free. There are no other known leaking plant components. Note: In 2016, one quarterly sample at well location CR3-2 could not be obtained during the third quarter as the area was inaccessible due to construction work associated with the CR3 ISFSI project.

4. In 2016, only three wells continued to show tritium very low tritium concentrations above MDA, the same as in 2015. Well #5 (CR3-5) had the highest tritium concentrations which ranged from 458 to 503 pCi/L based on four samples. Overall, no significant trend could be seen in well tritium concentrations as they remain close to or below MDA levels.

Along with these wells, two other wells that are not presently part of the REMP program have been sampled.

They are on either side (north and south) of the plant settling ponds (percolation ponds) and are referred to as MWC-27 and MWC-IF2. Both of these wells did not show tritium concentrations above MDA levels in 2016, same as in 2015.

27 IV-C. WATERBORNE PATHWAY Contd There has been no measurable amounts of gamma emitting radionuclides in any of these wells. There have also been no measurable amounts of hard-to-detect (HTD) radionuclides in any of these wells with exception of trace levels of gross alpha, which is expected, given the naturally occurring limestone strata that surrounds the Florida aquifer. It should be noted that site ground water flows in a west-southwest direction toward the Gulf of Mexico. This flow was re-verified in 2006 with a new ground water flow study performed by a certified hydro-geologist as part of the NEI Ground Water Protection Initiative. In 2012 another groundwater flow study was performed to evaluate groundwater flow post installation of CR Units 4

& 5 clean air scrubber system. This scrubber system utilizes significant groundwater from the Florida aquifer. The flow study confirmed that the groundwater flow, and direction of flow, has not been altered due to the installation and operation of the clean air scrubber system.

Additionally, the groundwater at the CR3 site is too saline for use as a potable water source, hence there is no drinking water uptake pathway at the Crystal River site.

Table IV-C.3. provides a statistical summary of the groundwater tritium and gamma spectroscopy results.

Table IV-C.3.a.1 provides the results of the quarterly samples and additional monthly samples when taken.

5. Monthly non-REMP required well samples were collected as discussed in item #3 above. Two wells were sampled. These two wells are located on the north side and the south side of the site percolation ponds.

The information is discussed above. Both of these wells showed no measurable amounts of any other radionuclides of interest. The tritium concentration in these wells, discussed in item #3 above, have decreased significantly due to a focused reduction in the number of discharges from the station drain tank (SDT-1) to the site settling ponds (percolation ponds) and are now less than the minimum detectable. The 3rd quarter samples were not available at these locations and only three samples were obtained in 2016 at each location.

Table IV-C.4 provides a statistical summary of the groundwater tritium and gamma spectroscopy results.

Table IV-C.4.a. provides the results of the monthly supplemental non-REMP required samples.

6. Quarterly drinking water samples are drawn from three locations: the Crystal River City Hall (C07), the Days Inn Motel (C10), and the Yankeetown City Well (C18). All samples were collected and analyzed for gamma emitters and tritium.

In 2016, none of the samples yielded measurable activities of tritium or the required gamma emitters. The measurement sensitivity for drinking water samples are the same as those for ground water samples.

Since the beginning of sampling, the drinking water samples have not had any other positive-measured radionuclides of interest detected.

Table IV-C.5 provides a statistical summary of the drinking water tritium and gamma spectroscopy results.

Table IV-C.5.a provides the results of the quarterly samples.

7. Semiannual shoreline sediment samples are taken at three indicator locations in the discharge canal (C14H, C14M, C14G) and one control location (C09) at Fort Island Gulf Beach. The plant discharge canal is the primary liquid effluent release pathway from CR-3.

In 2016, one of the six samples showed Cs-137 above MDA levels (location C14M had 21 pCi/kg Cs-137 in the Feb 2016 sample). None of the other samples showed CR3 licensed activity above MDA values. In 2015, three of the six samples had measurable amounts of cesium-137, with an average concentration of 24 pCi/kg and a range of 17 to 39 pCi/kg. In 2015 there were also three shoreline sediment samples with measurable amounts of cobalt-60 with a concentration range of 35 to 109 pCi/kg.

In 2014, of the six indicator samples, four had measurable amounts of cesium-137 with an average concentration of 23 pCi/kg and a range of 11 to 57 pCi/kg. There were five shoreline sediment samples with measurable amounts of cobalt-60 with a concentration range of 7 to 47 pCi/kg.

28 IV-C. WATERBORNE PATHWAY Contd In 2013 two samples had measurable amounts of cesium-137 with an average of 8.5 pCi/kg and a range of 8 to 9 pCi/kg. There were no samples with measurable amounts of cobalt-60 in any of the shoreline sediment samples.

In 2012 three samples had measurable amounts of cesium-137 with an average of 28 pCi/kg and a range of 19 to 35 pCi/kg. Also there were three samples with measurable amounts of cobalt-60 with a concentration range of 14 to 24 pCi/kg.

In 2011 the average cesium-137 concentration at the indicator locations was 28 pCi/kg In 2010, the average cesium-137 concentration at the indicator locations was 19 pCi/kg The average cobalt-60 concentration at the indicator locations ranged from 24 to 389 pCi/kg from 1998 through 2008 The 2016 shoreline sediment results are similar to previous years results with exception of there being a slight decrease in the number of samples with measurable Cs-137. The decrease in the number of samples containing Cs-137 may be related to fewer liquid plant releases during 2016. None of the samples taken at Fort Island Gulf Beach, the control location station C09, indicated measurable amounts of cobalt or cesium.

Table IV-C.6 provides a statistical summary of the shoreline sediment gamma spectroscopy results.

Table IV-C.6.a provides the results of the semi-annual samples.

8. Additional samples taken in 2016 but not required by the ODCM: Site Settling Ponds Annual sediment samples were collected at four locations in the site settling ponds. There were no measurable amounts of Cs-137, Cs-134 or Co-60 in any of the samples.

Annual surface water samples were collected at two locations in the site settling ponds. The tritium concentration was < LLD in both samples. All of the pond surface water samples showed no measurable amounts of any other radionuclides of interest.

Table IV-C.7 provides the results of the settling pond samples.

9. There were no unmonitored spills or releases of radioactive material in 2016 that could have the potential to contaminate the ground water per the guidelines of the Nuclear Energy Institute Ground Water Protection Initiative - Final Guidance Document 07-07. As such, there were no communiqués issued to state, local, or regulatory agencies.

State and local governmental officials have been updated regarding the status of the groundwater monitoring program at the Crystal River site per the requirements of the NEI 07-07 Guidelines.

29 TABLE IV-C.1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

CRYSTAL RIVER UNIT 3 DOCKET NO. 50-302 CITRUS COUNTY, FLORIDA JANUARY 1 TO DECEMBER 31, 2016 MEDIUM OR PATHWAY SAMPLED (UNITS)

ANALYSIS AND TOTAL NUMBER OF ANALYSES PERFORMED LOWER LIMIT OF DETECTION (LLD)1 ALL INDICATOR LOCATIONS MEAN RANGE LOCATION WITH HIGHEST MEAN NAME MEAN DISTANCE & BEARING RANGE CONTROL LOCATION MEAN RANGE NUMBER OF NONROUTINE REPORTED MEASUREMENTS SEAWATER (pCi/L)

Tritium, 36 172

<LLD

<LLD 0

Spec, 36 Mn-54 4

<LLD

<LLD 0

Fe-59 7

<LLD

<LLD 0

Co-58 4

<LLD

<LLD 0

Co-60 4

<LLD

<LLD 0

Zn-65 8

<LLD

<LLD 0

Zr-Nb-95 6

<LLD

<LLD 0

Cs-134 3

<LLD

<LLD 0

Cs-137 4

<LLD

<LLD 0

Ba-La-140 8

<LLD

<LLD 0

1The "a priori" LLD which meets or exceeds the requirements of Table 2-9 of the CR-3 ODCM.

30 TABLE IV-C.1.a DUKE ENERGY FLORIDA, LLC-CR3 - 2016 pCi/L EMITTERS AND TRITIUM IN SEAWATER STATION MONTH H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-Nb-95 Cs-134 Cs-137 Ba-La-140 C13 JAN

<145 244+/-21

<3

<7

<4

<7

<5

<3

<4

<7 FEB

<148 256+/-23

<3

<8

<4

<7

<5

<3

<4

<6 MAR

<163 238+/-21

<3

<5

<3

<7

<5

<3

<7 APR

<157 256+/-21

<3

<7

<4

<7

<5

<3

<4

<6 MAY

<163 334+/-17

<2

<4

<2

<4

<2

<5 JUN

<155 272+/-22

<3

<7

<3

<7

<5

<3

<10 JUL

<149 231+/-17

<2

<3

<6

<3

<6

<4

<2

<3

<5 AUG

<148 199+/-31

<6

<5

<12

<6

<14

<9

<5

<6

<11 SEP

<157 296+/-37

<6

<11

<7

<14

<11

<5

<7

<15 OCT

<161 290+/-38

<7

<5

<13

<6

<13

<11

<6

<9 NOV

<160 301+/-23

<3

<6

<3

<8

<5

<3

<10 DEC

<162 347+/-39

<6

<12

<7

<13

<10

<5

<6

<11 C14G JAN

<151 241+/-14

<2

<5

<2

<4

<3

<2

<3 FEB

<148 167+/-17

<3

<6

<3

<8

<5

<3

<7 MAR

<163 173+/-18

<3

<7

<3

<7

<5

<3

<7 APR

<157 153+/-17

<3

<6

<3

<7

<5

<3

<5 MAY

<163 252+/-18

<2

<5

<3

<5

<4

<2

<3

<7 JUN

<171 273+/-19

<2

<5

<3

<5

<3

<2

<7 JUL

<149 224+/-18

<2

<3

<6

<3

<6

<5

<3

<5 AUG

<156 261+/-40

<6

<13

<5

<9

<11

<5

<10 SEP

<157 251+/-22

<3

<7

<3

<7

<5

<3

<10 OCT

<161 224+/-20

<3

<2

<7

<4

<6

<5

<3

<4

<6 NOV

<158 270+/-22

<3

<4

<6

<2

<6

<5

<3

<10 DEC

<162 249+/-33

<6

<11

<7

<14

<10

<6

<10

31 TABLE IV-C.1a (CONT'D)

DUKE ENERGY FLORIDA, LLC-CR3 - 2016 pCi/L EMITTERS AND TRITIUM IN SEAWATER STATION MONTH H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-Nb-95 Cs-134 Cs-137 Ba-La-140 C14H JAN

<151 281+/-18

<3

<5

<3

<5

<4

<2

<4 FEB

<148 74.+/-13

<3

<6

<3

<7

<6

<3

<4

<8 MAR

<163 229+/-16

<2

<3

<5

<3

<5

<4

<2

<3

<5 APR

<157 229+/-20

<3

<2

<7

<4

<7

<5

<3

<7 MAY

<163 298+/-23

<3

<6

<3

<7

<5

<3

<7 JUN

<155 212+/-17

<2

<5

<3

<6

<4

<2

<3

<7 JUL

<147 216+/-18

<3

<7

<3

<7

<5

<3

<5 AUG

<156 153+/-30

<6

<7

<15

<7

<13

<12

<6

<7

<19 SEP

<157 192+/-18

<3

<7

<3

<7

<5

<3

<4

<12 OCT

<161 254+/-36

<7

<6

<14

<6

<13

<12

<5

<6

<8 NOV

<158 162+/-19

<3

<6

<3

<7

<5

<3

<10 DEC

<162 228+/-37

<6

<12

<7

<13

<11

<6

<7

<9

32 1

10 100 1000 10000 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 pCi/Liter Seawater H-3 Cs-134 LLD Cs-137 LLD measured values measured value

33 TABLE IV-C.2 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

CRYSTAL RIVER UNIT 3 DOCKET NO. 50-302 CITRUS COUNTY, FLORIDA JANUARY 1 TO DECEMBER 31, 2016 MEDIUM OR PATHWAY SAMPLED (UNITS)

ANALYSIS AND TOTAL NUMBER OF ANALYSES PERFORMED LOWER LIMIT OF DETECTION (LLD)1 ALL INDICATOR LOCATIONS MEAN RANGE LOCATION WITH HIGHEST MEAN NAME MEAN DISTANCE & BEARING RANGE CONTROL LOCATION MEAN RANGE NUMBER OF NONROUTINE REPORTED MEASUREMENTS GROUND Tritium, 2 158

<LLD

<LLD 0

WATER2 (pCi/L)

Spec, 2 Mn-54 6

<LLD

<LLD 0

Fe-59 13

<LLD

<LLD 0

Co-58 6

<LLD

<LLD 0

Co-60 6

<LLD

<LLD 0

Zn-65 13

<LLD

<LLD 0

Zr-Nb-95 10

<LLD

<LLD 0

Cs-134 5

<LLD

<LLD 0

Cs-137 7

<LLD

<LLD 0

Ba-La-140 13

<LLD

<LLD 0

1The "a priori" LLD which meets or exceeds the requirements of Table 2-9 of the CR-3 ODCM.

2There is no drinking water uptake pathway at the Crystal River site.

34 TABLE IV-C.2.a DUKE ENERGY FLORIDA, LLC-CR3 - 2016 pCi/L EMITTERS AND TRITIUM IN GROUND WATER STATION NUCLIDE FIRST HALF SECOND HALF C40 H-3

<154

<158 Mn-54

<3

<6 Fe-59

<8

<13 Co-58

<3

<6 Co-60

<4

<6 Zn-65

<9

<13 Zr-Nb-95

<6

<10 Cs-134

<4

<5 Cs-137

<4

<7 Ba-La-140

<6

<13 K-40

<44

<73

35 1

10 100 1000 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 pCi/L Semi-Annual Ground Water H-3 LLD Cs-137 LLD

36 TABLE IV-C.3 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

CRYSTAL RIVER UNIT 3 DOCKET NO. 50-302 CITRUS COUNTY, FLORIDA JANUARY 1 TO DECEMBER 31, 2016 MEDIUM OR PATHWAY SAMPLED (UNITS)

ANALYSIS AND TOTAL (NUMBER)2 OF ANALYSES PERFORMED LOWER LIMIT OF DETECTION (LLD)1 ALL INDICATOR LOCATIONS MEAN RANGE LOCATION WITH HIGHEST MEAN NAME MEAN DISTANCE & BEARING RANGE CONTROL LOCATION MEAN RANGE NUMBER OF NONROUTINE REPORTED MEASUREMENTS CR3 SITE Tritium 51 161 265 (7/51)

CR3-5 473(4/4)

CR3-2 0

GROUND WATER (171-503) 0.051 mi.@225° (448-503) 153(0/3)

(pCi/L)

(LLD)

Spec 63 Mn-54 8

<LLD

<LLD 0

Fe-59 15

<LLD

<LLD 0

Co-58 7

<LLD

<LLD 0

Co-60 9

<LLD

<LLD 0

Zn-65 16

<LLD

<LLD 0

Zr-Nb-95 12

<LLD

<LLD 0

Cs-134 7

<LLD

<LLD 0

Cs-137 7

<LLD

<LLD 0

Ba-La-140 21

<LLD

<LLD 0

1The "a priori" LLD which meets or exceeds the requirements of Table 2-9 of the CR-3 ODCM.

2Includes extra samples collected for data trending.

37 TABLE IV-C.3.a.1 DUKE ENERGY FLORIDA, LLC-CR3 - 2016 pCi/L EMITTERS AND TRITIUM IN CR3 SITE GROUND WATER STATION DATE H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zn-Nb-95 Cs-134 Cs-137 Ba-La-140 CR3-1D 01-21

<151

<53

<4

<7

<4

<7

<4

<6 04-13

<153

<51

<3

<6

<3

<7

<5

<3

<6 07-21

<150

<50

<4

<3

<7

<4

<8

<6

<4

<13 10-13

<155

<98

<6

<11

<6

<15

<9

<6

<8 CR3-1S 01-21 175

<52

<3

<7

<4

<8

<6

<4

<6 04-13

<153

<38

<3

<6

<3

<6

<5

<3

<5 07-21 171

<41

<3

<4

<6

<3

<7

<6

<3

<4

<12 10-13

<155

<34

<4

<3

<5

<3

<7

<5

<3

<5 CR3-2 01-21

<142

<42

<3

<7

<3

<7

<5

<3

<5 04-29

<161

<24

<4

<7

<3

<8

<6

<3

<6 07-21 (1)

(1)

(1) 10-13

<155

<102

<6

<7

<12

<7

<14

<10

<6

<10

38 TABLE IV-C.3.a.1 DUKE ENERGY FLORIDA, LLC-CR3 - 2016 pCi/L EMITTERS AND TRITIUM IN CR3 SITE GROUND WATER STATION DATE H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zn-Nb-95 Cs-134 Cs-137 Ba-La-140 CR3-3D 01-21

<142

<46

<3

<6

<3

<6

<4

<6 04-13

<149

<51

<4

<7

<4

<9

<7

<4

<6 07-21

<150

<87

<8

<7

<13

<9

<16

<11

<7

<21 10-13

<155

<56

<4

<7

<4

<9

<7

<4

<6 CR3-3S 01-21

<151

<37

<3

<2

<5

<3

<5

<4

<2

<3

<4 04-13

<152

<52

<3

<4

<7

<4

<7

<6

<3

<6 07-21

<150

<38

<4

<7

<3

<8

<6

<3

<4

<10 10-13

<155

<89

<7

<5

<9

<7

<12

<11

<6

<7

<10 CR3-4 01-21

<142

<46

<3

<7

<4

<9

<6

<4

<7 04-13

<153

<37

<3

<4

<6

<3

<7

<6

<3

<6 07-21

<150

<73

<7

<6

<11

<7

<15

<12

<6

<7

<18 10-13

<155

<42

<3

<8

<3

<7

<6

<4

<6

39 TABLE IV-C.3.a.1 DUKE ENERGY FLORIDA, LLC-CR3 - 2016 pCi/L EMITTERS AND TRITIUM IN CR3 SITE GROUND WATER STATION DATE H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zn-Nb-95 Cs-134 Cs-137 Ba-La-140 CR3-5 01-21 503

<53

<3

<7

<3

<7

<6

<3

<4

<5 04-13 481

<34

<2

<3

<5

<3

<6

<4

<2

<3

<4 07-21 448

<100

<5

<6

<12

<6

<14

<10

<6

<12 10-13 459

<66

<6

<11

<7

<13

<10

<5

<6

<10 CR3-6S 01-21

<142

<15

<2

<4

<2

<4

<2

<3 04-13

<152

<15

<2

<4

<2

<5

<3

<2

<3 07-21

<150

<51

<3

<6

<4

<7

<6

<3

<5 10-13

<155

<83

<7

<6

<15

<6

<15

<11

<6

<7

<11 CR3-6D 01-21

<142

<32

<4

<3

<7

<4

<8

<5

<4

<6 04-13

<152

<31

<4

<7

<4

<8

<7

<3

<5 07-21

<167

<36

<4

<3

<7

<4

<7

<5

<3

<5 10-13

<155

<80

<6

<14

<7

<14

<11

<6

<11

40 TABLE IV-C.3.a.1 (contd)

DUKE ENERGY FLORIDA, LLC-CR3 - 2016 pCi/L EMITTERS AND TRITIUM IN CR3 SITE GROUND WATER STATION DATE H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zn-Nb-95 Cs-134 Cs-137 Ba-La-140 CR3-7 01-21

<152

<45

<3

<7

<3

<7

<5

<3

<6 04-29

<161

<46

<4

<3

<7

<3

<8

<6

<3

<4

<6 07-21

<150

<88

<6

<11

<6

<11

<10

<7

<6

<10 10-13

<155

<76

<5

<7

<12

<6

<12

<9

<6

<9 CR3-8 01-21 170

<45

<4

<3

<7

<4

<8

<6

<3

<4

<6 04-13

<152

<46

<3

<4

<8

<3

<8

<7

<4

<6 07-21

<163

<22

<3

<7

<3

<8

<6

<4

<3

<5 10-13

<155

<50

<4

<3

<7

<4

<8

<5

<4

<6 CR3-9 01-21

<151

<49

<3

<7

<3

<7

<5

<3

<4

<5 04-13

<153

<54

<3

<7

<3

<7

<5

<4

<6 07-21

<150

<91

<6

<10

<5

<13

<11

<5

<7

<12 10-13

<161

<22

<3

<7

<3

<6

<3

<5

41 TABLE IV-C.3.a.1 (contd)

DUKE ENERGY FLORIDA, LLC-CR3 - 2016 pCi/L EMITTERS AND TRITIUM IN CR3 SITE GROUND WATER STATION DATE H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zn-Nb-95 Cs-134 Cs-137 Ba-La-140 CR3-10 01-21

<151

<16

<2

<5

<2

<5

<4

<2

<4 04-13

<153

<41

<3

<7

<3

<8

<6

<3

<5 07-21

<167

<42

<3

<6

<3

<8

<6

<3

<5 10-13

<155

<78

<6

<5

<13

<7

<15

<11

<6

<11

42 0

20 40 60 80 100 120 140 160 180 200 04/01/12 10/18/12 05/06/13 11/22/13 06/10/14 12/27/14 07/15/15 01/31/16 08/18/16 03/06/17 pCi/l Tritium Measurement GW Well # CR3-1S All results are < LLD unless

+ measurement

43 0

20 40 60 80 100 120 140 160 180 200 10/18/12 05/06/13 11/22/13 06/10/14 12/27/14 07/15/15 01/31/16 08/18/16 03/06/17 pCi/l Tritium Measurement GW Well # CR3-1D All results are < LLD unless

+ measurement

44 0

20 40 60 80 100 120 140 160 180 200 05/28/05 10/10/06 02/22/08 07/06/09 11/18/10 04/01/12 08/14/13 12/27/14 05/10/16 09/22/17 pCi/l Tritium Measurement GW Well # CR3-2 All results are < LLD unless

+ measurement sample unavailable 3rd quarter 2016

45 0

20 40 60 80 100 120 140 160 180 200 10/18/12 05/06/13 11/22/13 06/10/14 12/27/14 07/15/15 01/31/16 08/18/16 03/06/17 pCi/l Tritium Measurement GW Well # CR3-3S All results are < LLD unless noted

46 0

20 40 60 80 100 120 140 160 180 200 05/06/13 11/22/13 06/10/14 12/27/14 07/15/15 01/31/16 08/18/16 03/06/17 pCi/l Tritium Measurement GW Well # CR3-3D All results are < LLD unless noted

+ measurement

47 0

20 40 60 80 100 120 140 160 180 200 10/10/06 02/22/08 07/06/09 11/18/10 04/01/12 08/14/13 12/27/14 05/10/16 09/22/17 pCi/l Tritium Measurement GW Well # CR3-4 All results are < LLD unless noted

+ Measurement

48 0

500 1000 1500 2000 2500 10/10/06 02/22/08 07/06/09 11/18/10 04/01/12 08/14/13 12/27/14 05/10/16 09/22/17 pCi/l Tritium Measurement GW Well # CR3-5

<LLD NCR 341994 EFT-2 Isolated 1/24/12

49 0

20 40 60 80 100 120 140 160 180 200 05/28/05 10/10/06 02/22/08 07/06/09 11/18/10 04/01/12 08/14/13 12/27/14 05/10/16 09/22/17 pCi/l Tritium Measurement GW Well # CR3-6S All results are < LLD unless noted

+ measurement

+

measurement

+ measurement

50 0

20 40 60 80 100 120 140 160 180 200 10/10/06 02/22/08 07/06/09 11/18/10 04/01/12 08/14/13 12/27/14 05/10/16 09/22/17 pCi/l Tritium Measurements GW Well # CR3-6D All results are < LLD unless noted

+ measurements

51 0

100 200 300 400 500 600 700 800 10/10/06 02/22/08 07/06/09 11/18/10 04/01/12 08/14/13 12/27/14 05/10/16 09/22/17 pCi/l Tritium Measurements GW Well # CR3-7

<LLD

<<LLD

<LLD

52 0

50 100 150 200 250 10/10/06 02/22/08 07/06/09 11/18/10 04/01/12 08/14/13 12/27/14 05/10/16 09/22/17 pCi/l Tritium Measurements GW Well # CR3-8

<LLD

<LLD sx re-analyzed &

averaged

<LLD

53 0

20 40 60 80 100 120 140 160 180 200 10/10/06 02/22/08 07/06/09 11/18/10 04/01/12 08/14/13 12/27/14 05/10/16 09/22/17 pCi/l Tritium Measurements GW Well # CR3-9 All results are < LLD unless noted

+ measurement

54 0

20 40 60 80 100 120 140 160 180 200 10/10/06 02/22/08 07/06/09 11/18/10 04/01/12 08/14/13 12/27/14 05/10/16 09/22/17 pCi/l Tritium Measurements GW Well # CR3-10 All results are < LLD unless noted

+ measurement

55 TABLE IV-C.4 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

CRYSTAL RIVER UNIT 3 DOCKET NO. 50-302 CITRUS COUNTY, FLORIDA JANUARY 1 TO DECEMBER 31, 2016 MEDIUM OR PATHWAY SAMPLED (UNITS)

ANALYSIS AND TOTAL NUMBER OF ANALYSES PERFORMED LOWER LIMIT OF DETECTION (LLD)1 ALL INDICATOR LOCATIONS MEAN RANGE LOCATION WITH HIGHEST MEAN NAME MEAN DISTANCE & BEARING RANGE CONTROL LOCATION MEAN RANGE NUMBER OF NONROUTINE REPORTED MEASUREMENTS

CR3 SITE Tritium 6 161

<LLD (0/10)

MWC-27 (0/3)

CR3-2 0

GROUND WATER 0.30 mi.@266° (<LLD)

(<LLD)

(pCi/L)

Spec 6 Mn-54 5

<LLD

<LLD 0

Fe-59 12

<LLD

<LLD 0

Co-58 7

<LLD

<LLD 0

Co-60 7

<LLD

<LLD 0

Zn-65 13

<LLD

<LLD 0

Zr-Nb-95 10

<LLD

<LLD 0

Cs-134 5

<LLD

<LLD 0

Cs-137 7

<LLD

<LLD 0

Ba-La-140 10

<LLD

<LLD 0

1The "a priori" LLD which meets or exceeds the requirements of Table 2-9 of the CR-3 ODCM.

Non-REMP required samples

56 TABLE IV-C.4.a DUKE ENERGY FLORIDA, LLC-CR3 - 2016 pCi/L EMITTERS AND TRITIUM IN CR3 SITE GROUND WATER (SUPPLEMENTAL DATA)

STATION DATE H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zn-Nb-95 Cs-134 Cs-137 Ba-La-140 MWC-27*

01-21

<151

<50

<4

<3

<8

<4

<7

<6

<4

<7 04-13

<152

<65

<4

<8

<4

<9

<8

<4

<5

<7 10-13

<161

<79

<6

<7

<12

<7

<13

<10

<5

<7

<10

= These wells are not officially included in the REMP and are located on either side (north and south) of the site percolation ponds.

57 TABLE IV-C.4.a (contd)

DUKE ENERGY FLORIDA, LLC-CR3 - 2016 pCi/L EMITTERS AND TRITIUM IN CR3 SITE GROUND WATER (SUPPLEMENTAL DATA)

STATION DATE H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zn-Nb-95 Cs-134 Cs-137 Ba-La-140 MWC-IF2*

01-21

<152

<51

<3

<7

<3

<8

<5

<3

<5 04-13

<152

<45

<4

<7

<4

<8

<6

<3

<4

<6 10-13

<155

<44

<3

<7

<3

<7

<6

<3

<4

<5

These wells are not officially included in the REMP and are located on either side (north and south) of the site percolation ponds.

58 0

200 400 600 800 1000 1200 1400 10/10/06 02/22/08 07/06/09 11/18/10 04/01/12 08/14/13 12/27/14 05/10/16 09/22/17 pCi/l Tritium Measurements GW Well # MWC-27

<LLD

59 0

100 200 300 400 500 600 10/10/06 02/22/08 07/06/09 11/18/10 04/01/12 08/14/13 12/27/14 05/10/16 09/22/17 pCi/l Tritium Measurements GW Well # MWC-IF2

< LLD

<LLD

60 TABLE IV-C.5 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

CRYSTAL RIVER UNIT 3 DOCKET NO. 50-302 CITRUS COUNTY, FLORIDA JANUARY 1 TO DECEMBER 31, 2016 MEDIUM OR PATHWAY SAMPLED (UNITS)

ANALYSIS AND TOTAL NUMBER OF ANALYSES PERFORMED LOWER LIMIT OF DETECTION (LLD)1 ALL INDICATOR LOCATIONS MEAN RANGE LOCATION WITH HIGHEST MEAN NAME MEAN DISTANCE & BEARING RANGE CONTROL LOCATION MEAN RANGE NUMBER OF NONROUTINE REPORTED MEASUREMENTS DRINKING Tritium 12 161

<LLD

<LLD 0

WATER (pCi/L)

Spec 12 Mn-54 6

<LLD

<LLD 0

Fe-59 12

<LLD

<LLD 0

Co-58 6

<LLD

<LLD 0

Co-60 6

<LLD

<LLD 0

Zn-65 15

<LLD

<LLD 0

Zr-Nb-95 11

<LLD

<LLD 0

Cs-134 5

<LLD

<LLD 0

Cs-137 5

<LLD

<LLD 0

Ba-La-140 14

<LLD

<LLD 0

1The "a priori" LLD which meets or exceeds the requirements of Table 2-9 of the CR-3 ODCM.

61 TABLE IV-C.5.a DUKE ENERGY FLORIDA, LLC-CR3 - 2016 pCi/L EMITTERS AND TRITIUM IN DRINKING WATER STATION DATE H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zn-Nb-95 Cs-134 Cs-137 Ba-La-140 C07 01-19

<150

<39

<3

<7

<3

<8

<6

<4

<9 04-11

<153

<38

<3

<6

<3

<7

<4

<3

<12 07-12

<147

<37

<3

<5

<2

<5

<4

<2

<4 10-04

<161

<109

<6

<5

<11

<4

<12

<9

<5

<14 C10 01-19

<150

<29

<3

<5

<3

<7

<5

<3

<8 04-11

<153

<53

<4

<3

<6

<4

<8

<6

<3

<4

<13 07-12

<149

<19

<2

<3

<2

<4

<3

<2

<3 10-04

<161

<95

<6

<12

<6

<15

<11

<4

<5

<12 C18 01-19

<155

<24

<2

<4

<2

<4

<3

<2

<5 04-11

<153

<31

<3

<5

<4

<7

<5

<3

<11 07-12

<149

<43

<2

<5

<3

<5

<4

<2

<4 10-04

<161

<33

<3

<7

<3

<6

<5

<3

<4

62 0.1 1

10 100 1000 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 pCi/Liter Quarterly Drinking Water H-3 LLD Cs-137 LLD

63 TABLE IV-C.6 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

CRYSTAL RIVER UNIT 3 DOCKET NO. 50-302 CITRUS COUNTY, FLORIDA JANUARY 1 TO DECEMBER 31, 2016 MEDIUM OR PATHWAY SAMPLED (UNITS)

ANALYSIS AND TOTAL NUMBER OF ANALYSES PERFORMED LOWER LIMIT OF DETECTION (LLD)1 ALL INDICATOR LOCATIONS MEAN RANGE LOCATION WITH HIGHEST MEAN NAME MEAN DISTANCE & BEARING RANGE CONTROL LOCATION MEAN RANGE NUMBER OF NONROUTINE REPORTED MEASUREMENTS SHORELINE Spec 8 SEDIMENT (pCi/kg)

Cs-134 19

<LLD

<LLD 0

Cs-137 15 21 (1/8)

C14M 21 (1/2)

<LLD 0

(21-21) 1.2 mi. @ 270º (21-21) 1The "a priori" LLD which meets or exceeds the requirements of Table 2-9 of the CR-3 ODCM.

64 TABLE IV-C.6.a DUKE ENERGY FLORIDA, LLC-CR3 - 2016 pCi/kg EMITTERS IN SHORELINE SEDIMENT STATION PERIOD Co-58 Co-60 Cs-134 Cs-137 K-40 Ra-226 C09 First Half

<9

<10

<8

<9 101+/-35 342+/-37 Second Half

<7

<6

<7

<7 353+/-32 459+/-54 C14H First Half

<11

<12

<13 824+/-58 2104+/-146 Second Half

<20

<22

<19

<23 700+/-94 2728+/-223 C14M First Half

<8

<7

<9 198+/-27 1864+/-125 Second Half

<11

<13

<12 21+/-2 1082+/-65 2067+/-158 C14G First Half

<9

<11

<10

<11 261+/-33 1294+/-101 Second Half

<15

<14

<13

<15 209+/-56 1172+/-130 C09 is the control station at Ft. Island Beach. C14H, C14M, & C14G are discharge canal stations.

65 1

10 100 1000 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 pCi/Kilogram Shoreline Sediment Cs-134 LLD Cs-137

66 TABLE IV-C.7 SUPPLEMENTAL DATA DUKE ENERGY FLORIDA, LLC-CR3 - 2016 pCi/L EMITTERS AND TRITIUM IN SITE SETTLING PONDS SURFACE WATER STATION MONTH H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-Nb-95 Cs-134 Cs-137 Ba-La-140 31NE DEC

<170

<32

<3

<6

<3

<7

<5

<3

<9 32NE DEC

<170

<40

<3

<6

<3

<7

<5

<3

<10 pCi/kg EMITTERS IN SITE SETTLING PONDS SEDIMENT STATION MONTH Co-58 Co-60 Cs-134 Cs-137 K-40 Ra-226 31NE DEC

<16

<15

<14

<16 912 +/- 23 2067 +/- 158 31NW DEC

<27

<24

<23 1416 +/- 135 2909 +/- 1183 32NE DEC

<15

<13

<12

<15 281 +/- 56 1197 +/- 122 32NW DEC

<13

<12

<11

<13 274 +/- 50

<340

67 IV-D. INGESTION PATHWAY To evaluate the ingestion pathway, samples are taken of fish, oysters, broad leaf vegetation, citrus, and watermelon.

1. Quarterly carnivorous fish samples were taken at two locations: C29 at the end of the discharge canal, and C30, the control location, near the mouth of the intake canal.

In 2016, none of the required radionuclides were found in measurable quantities. The highest cesium-137 LLD for stations C29 and C30 was 27 pCi/kg. Naturally occurring potassium-40 was quantified in all eight samples at an average concentration of 2,381 pCi/kg.

In 2015, none of the required radionuclides were found in measurable quantities.

In 2014, none of the required radionuclides were found in measurable quantities.

In 2013, none of the radionuclides of interest were identified in measurable quantities.

In 2012, none of the radionuclides of interest were identified in measurable quantities.

In 2011, none of the radionuclides of interest were identified in measurable quantities.

In 2010, none of the radionuclides of interest were identified in measurable quantities.

Table IV-D.1 provides a statistical summary of the carnivorous fish gamma spectroscopy results.

Table IV-D.1.a provides the results of the quarterly samples.

2. Quarterly oyster samples were taken at the same locations as fish samples, C29 and C30.

In 2016, none of the required radionuclides were found in measurable quantities.

In 2015, none of the required radionuclides were found in measurable quantities.

In 2014, none of the required radionuclides were found in measurable quantities. Additionally, silver-110m was found in one sample at location C29 with a concentration of 35 pCi/kg.

In 2013, none of the required radionuclides were found in measurable quantities. Additionally, silver-110m was not quantified in any sample.

In 2012, of the isotopes required to be evaluated, one sample from station C29 indicated measurable amounts of cesium-137 at a concentration of 22 pCi/L. This value was statistically positive, but is in the range of the analytical LLD. Also, silver-110m was not quantified in any sample.

In 2011, silver-110m was quantified in two samples at C29 with an average concentration of 19 pCi/kg and a range of 14 to 23 pCi/kg. There were no other radionuclides of interest identified in any oyster samples in 2011.

In 2010, silver-110m was not quantified in any oyster samples collected. There were no other radionuclides of interest identified in any oyster samples in 2010.

Table IV-D.2 provides a statistical summary of the oyster gamma spectroscopy results.

Table IV-D.2.a provides the results of the quarterly samples.

68

3. Monthly broad leaf vegetation samples were taken at two indicator locations, C48A and C48B, and one control location, C47.

In 2016, thirteen of twenty four indicator samples had measureable amounts of cesium-137 with an average concentration of 46 pCi/kg and a range of 11 to 179 pCi/kg. The control station (C47) located in Orlando, Fl. also had measurable amounts of cesium-137. In 10 of 12 control station samples there were measurable amounts of cesium-137 with an average concentration of 73 pCi/kg and a range of 10 to 174 pCi/kg. These results are similar to those in 2015.

In 2015, fourteen of twenty four indicator samples had measurable amounts of cesium-137 with an average concentration of 50 pCi/kg and a range of 12 to 105 pCi/kg. The control station (C47) located in Orlando, Fl. also had measurable amounts of cesium-137. In 11 of 12 control station samples there were measurable amounts of cesium-137 with an average concentration of 67 pCi/kg and a range of 15 to 150 pCi/kg. The cesium-137 values are similar in concentration as compared to samples collected in 2014 which experienced radionuclide deposition as a result of the Fukushima earthquake event in 2011 and are not a result of the operation of CR3.

In 2014, sixteen of twenty four indicator samples had measurable amounts of cesium-137 with an average concentration of 53 pCi/kg and a range of 4 to 159 pCi/kg. The control station (C47) located in Orlando, Fl. also had measurable amounts of cesium-137. In 10 of 12 control station samples there were measurable amounts of cesium-137 with an average concentration of 43 pCi/kg and a range of 17 to 71 pCi/kg. The cesium-137 values are similar in concentration as compared to samples collected in 2013 which experienced radionuclide deposition as a result of the Fukushima earthquake event in 2011 and are not a result of the operation of CR3.

In 2013, fifteen of twenty four indicator samples had measurable amounts of cesium-137 with an average concentration of 75 pCi/kg and a range of 5 to 147 pCi/kg. The control station (C47) located in Orlando, Fl. also had measurable amounts of cesium-137. In twelve of twelve control station samples there were measurable amounts of cesium-137 at an average concentration of 86 pCi/kg and a range of 14 to 258 pCi/kg. The cesium-137 values are similar in concentration as compared to samples collected in 2012 which experienced radionuclide deposition as a result of the Fukushima earthquake event and are not a result of the operation of CR3.

In 2012, thirteen of twenty four indicator samples had measurable amounts of cesium-137 with an average concentration of 86 pCi/kg and a range of 18 to 172 pCi/kg. The control station (C47) located in Orlando, Fl. also had measurable amounts of cesium-137. In eight of twelve control station samples there were measurable amounts of cesium-137 at an average concentration of 57 pCi/kg and a range of 16 to 201 pCi/kg. The cesium-137 values are similar in concentration as compared to samples collected in 2011 which experienced radionuclide deposition as a result of the Fukushima earthquake event and are not a result of the operation of CR3.

In 2011, eighteen of twenty four indicator samples had measurable amounts of cesium-137 with an average concentration of 76 pCi/kg and a range of 6 to 233 pCi/kg. Two of twenty four indicator samples also had measurable amounts of iodine-131 with an average of 232 pCi/kg and a range of 195-269 pCi/kg. The control station also had measurable amounts of iodine-131 and cesium-137. In seven of twenty one control station samples, there was measurable I-131 at an average concentration of 324 pCi/kg and a range of 13-1397 pCi/kg. In seventeen of twenty one control station samples there was measurable cesium-137 at an average concentration of 61 pCi/kg and a range of 7 to 182 pCi/kg. Nine extra control samples were collected at the Orlando station location.

These positive-measured radionuclides were a result of the Fukushima earthquake and tsunami event that occurred in 2011 and were not from the operation of CR3.

In 2010, five of twenty-four indicator samples had measurable amounts of cesium-137 with an average concentration of 66 pCi/kg and a range of 9 to 153 pCi/kg. This is higher than the levels found in 2009, but lower than in 2007 and 2008. It is believed the 2007 and 2008 spike was due to possible collection of wire grass mixed into the sample, which has a greater uptake rate of cesium as compared to other broad-leafed media. Additionally in 2010, eight of twelve control station samples had measurable amounts of cesium-137 with an average concentration of 21 pCi/kg and a range of 9 to 31 pCi/kg. During 2009 due to construction activities at the Crystal River Unit 4 & 5

69 site, the area where broad leaf vegetation was being collected at station C48A was removed. A new location in the same north sector was located near the air sample station C46. During 2010, also due to construction activities at the Crystal River Units 4 & 5 site, the area where broadleaf vegetation was being collected at station C48B became inaccessible. A new location in the ENE sector was located near the transmission power line corridor right of way, just NE of the mariculture center. This sector has the same D/Q value as the N and NNE sectors and is allowed by the ODCM.

Table IV-D.3 provides a statistical summary of the broad leaf vegetation gamma spectroscopy results.

Table IV-D.3.a provides the results of the monthly samples.

4. In 2016 one watermelon sample was collected at station C04. None of the required radionuclides were found in measurable quantities. One citrus sample (oranges and grapefruit) was collected at station C19. None of the required radionuclides were found in measurable quantities in the citrus sample.

In 2015 one watermelon sample was collected at station C04. None of the required radionuclides were found in measurable quantities. One citrus sample (oranges and grapefruit) was collected at station C19. None of the required radionuclides were found in measurable quantities in the citrus samples with exception of Cs-137 at a concentration of 9 pCi/kg. It is not unusual to periodically see Cs-137 in citrus samples due to widespread deposition of Cs-137 from fallout due to past weapons testing and more recent from the Fukushima earthquake and tsunami event that occurred in 2011.

In 2014 watermelon samples were collected at station C04. None of the required radionuclides were found in measurable quantities. Citrus samples (oranges and grapefruit) were collected at station C19. None of the required radionuclides were found in measurable quantities in the citrus samples with exception of Cs-137 (in grapefruit) at a concentration of 4 pCi/kg. It is not unusual to periodically see Cs-137 in citrus samples due to widespread deposition of Cs-137 from fallout due to past weapons testing and more recent from the Fukushima earthquake and tsunami event that occurred in 2011.

In 2013 watermelon samples were collected at station C04. None of the required radionuclides were found in measurable quantities. Citrus samples were taken at station C19. None of the required radionuclides were found in measurable quantities in the citrus samples with exception of Cs-137 at a concentration of 86 pCi/kg. It is not unusual to periodically see Cs-137 in citrus samples due to widespread deposition of Cs-137 from fallout due to past weapons testing.

In 2012 one watermelon sample was collected at station C04. This sample had no measurable quantities of radionuclides of interest. Citrus samples were taken at station C19. There were no measurable quantities of radionuclides of interest in the citrus samples.

In 2011 two watermelon samples were collected at station C04. One sample had a measurable amount of cesium-137 at a concentration of 14 pCi/kg. All other radionuclides of interest were

< LLD. Citrus samples were taken at station C19. There were no measurable quantities of radionuclides of interest in the citrus samples.

In 2010 watermelon samples were collected at station C04. None of the required radionuclides were found in measurable quantities. Citrus samples were taken at station C19. None of the required radionuclides were found in measurable quantities in the citrus samples with exception of Cs-137 at a concentration of 71 pCi/kg.

In 2008 and again in 2009, there were no watermelon samples available at station C04. In these 2 years, due to crop rotation, there were no locally grown watermelons found in any areas nearby the facility and no local commercial harvest performed.

Table IV-D.4 provides a statistical summary of the watermelon and citrus gamma spectroscopy results.

Table IV-D.4.a provides the results of the semi-annual samples.

70 TABLE IV-D.1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

CRYSTAL RIVER UNIT 3 DOCKET NO. 50-302 CITRUS COUNTY, FLORIDA JANUARY 1 TO DECEMBER 31, 2016 MEDIUM OR PATHWAY SAMPLED (UNITS)

ANALYSIS AND TOTAL NUMBER OF ANALYSES PERFORMED LOWER LIMIT OF DETECTION (LLD)1 ALL INDICATOR LOCATIONS MEAN RANGE LOCATION WITH HIGHEST MEAN NAME MEAN DISTANCE & BEARING RANGE CONTROL LOCATION MEAN RANGE NUMBER OF NONROUTINE REPORTED MEASUREMENTS CARNIVOROUS Spec 8 FISH (pCi/kg)

Mn-54 28

<LLD

<LLD 0

Fe-59 68

<LLD

<LLD 0

Co-58 29

<LLD

<LLD 0

Co-60 31

<LLD

<LLD 0

Zn-65 67

<LLD

<LLD 0

Cs-134 27

<LLD

<LLD 0

Cs-137 37

<LLD

<LLD 0

1The "a priori" LLD which meets or exceeds the requirements of Table 2-9 of the CR-3 ODCM.

71 TABLE IV-D.1.a DUKE ENERGY FLORIDA, LLC-CR3 - 2016 pCi/kg EMITTERS IN CARNIVOROUS FISH STATION QUARTER Mn-54 Co-58 Fe-59 Co-60 Zn-65 Cs-134 Cs-137 K-40 C29 1

<26

<24

<54

<31

<60

<27

<25 2186+/-194 2

<24

<23

<61

<23

<67

<22

<23 2968+/-239 3

<20

<18

<39

<17

<46

<19

<21 1842+/-141 4

<28

<68

<31

<59

<20

<27 2422+/-212 C30 1

<20

<16

<34

<18

<43

<18

<22 2249+/-160 2

<21

<22

<42

<26

<60

<23

<25 1975+/-209 3

<24

<27

<53

<30

<56

<22

<23 2246+/-219 4

<28

<29

<51

<31

<63

<23

<25 3160+/-244

72 1

10 100 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 pCi/Kilogram Carnivorous Fish Cs-134 LLD Cs-137 LLD measured values measured values

73 TABLE IV-D.2 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

CRYSTAL RIVER UNIT 3 DOCKET NO. 50-302 CITRUS COUNTY, FLORIDA JANUARY 1 TO DECEMBER 31, 2016 MEDIUM OR PATHWAY SAMPLED (UNITS)

ANALYSIS AND TOTAL NUMBER OF ANALYSES PERFORMED LOWER LIMIT OF DETECTION (LLD)1 ALL INDICATOR LOCATIONS MEAN RANGE LOCATION WITH HIGHEST MEAN NAME MEAN DISTANCE & BEARING RANGE CONTROL LOCATION MEAN RANGE NUMBER OF NONROUTINE REPORTED MEASUREMENTS OYSTERS Spec 8 (pCi/kg)

Mn-54 28

<LLD

<LLD 0

Fe-59 82

<LLD

<LLD 0

Co-58 35

<LLD

<LLD 0

Co-60 28

<LLD

<LLD 0

Zn-65 68

<LLD

<LLD 0

Cs-134 26

<LLD

<LLD 0

Cs-137 28

<LLD

<LLD 0

1The "a priori" LLD which meets or exceeds the requirements of Table 2-9 of the CR-3 ODCM.

74 TABLE IV-D.2.a DUKE ENERGY FLORIDA, LLC-CR3 - 2016 pCi/kg EMITTERS IN OYSTERS STATION QUARTER Mn-54 Co-58 Fe-59 Co-60 Zn-65 Cs-134 Cs-137 K-40 C29 1

<23

<27

<52

<27

<60

<24

<25 720+/-136 2

<19

<24

<50

<26

<53

<18

<22 773+/-139 3

<18

<21

<49

<16

<37

<18

<15 468+/-69 4

<26

<24

<82

<23

<63

<25

<22 1045+/-171 C30 1

<28

<27

<54

<28

<68

<25

<22 1102+/-151 2

<28

<25

<48

<23

<55

<26

<24 1139+/-128 3

<28

<35

<60

<26

<63

<22

<28 565+/-140 4

<24

<28

<61

<23

<56

<21

<26 1042+/-166

75 10 100 1000 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 pCi/Kilogram Oysters Cs-137 LLD Cs-134 LLD Measured Value

76 TABLE IV-D.3 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

CRYSTAL RIVER UNIT 3 DOCKET NO. 50-302 CITRUS COUNTY, FLORIDA JANUARY 1 TO DECEMBER 31, 2016 MEDIUM OR PATHWAY SAMPLED (UNITS)

ANALYSIS AND TOTAL NUMBER OF ANALYSES PERFORMED LOWER LIMIT OF DETECTION (LLD)1 ALL INDICATOR LOCATIONS MEAN RANGE LOCATION WITH HIGHEST MEAN NAME MEAN DISTANCE & BEARING RANGE CONTROL LOCATION MEAN RANGE NUMBER OF NONROUTINE REPORTED MEASUREMENTS BROAD LEAF VEGETATION Spec 36 (pCi/kg)

Cs-134 16

<LLD

<LLD 0

Cs-1372 21 46 (13/24)

(11-179)

C48B 57(11/12) 0.9 @ 73º (18-179) 67 (10/12)

(10-174) 0 1The "a priori" LLD which meets or exceeds the requirements of Table 2-9 of the CR-3 ODCM.

2The elevated Cs-137 values are not associated with the operation of CR3 and are a direct result of the Fukushima earthquake and tsunami event that occurred in 2011.

77 TABLE IV-D.3.a DUKE ENERGY FLORIDA, LLC-CR3 - 2016 pCi/kg OF EMITTERS IN BROAD LEAF VEGETATION STATION MONTH Cs-134 Cs-137 K-40 C47 JAN

<9 10+/-3 3862+/-160 FEB

<9

<13 3981+/-161 MAR

<13 14+/-4 2413+/-149 APR

<6 11+/-2 3296+/-112 MAY

<12 108+/-8 2631+/-147 JUN

<14

<18 4018+/-197 JUL

<11 138+/-8 2634+/-134 AUG

<7 174+/-7 1591+/-82 SEP

<8 146+/-7 2546+/-116 OCT

<10 17+/-3 5347+/-201 NOV

<14 49+/-7 2730+/-164 DEC

<8 137+/-7 2806+/-123 C48A JAN

<14

<18 1840+/-140 FEB

<14

<18 1867+/-141 MAR

<14

<17 3893+/-199 APR

<13

<17 3730+/-195 MAY

<12 13+/-5 3193+/-172 JUN

<14

<17 2480+/-161 JUL

<11

<14 1722+/-125 AUG

<13

<19 3369+/-195 SEP

<8

<9 2953+/-129 OCT

<13

<17 2897+/-167 NOV

<16

<19 3750+/-204 DEC

<13 11+/-5 1653+/-123

78 TABLE IV-D.3.a (CONT'D)

DUKE ENERGY FLORIDA, LLC-CR3 - 2016 pCi/kg OF EMITTERS IN BROAD LEAF VEGETATION STATION MONTH Cs-134 Cs-137 K-40 C48B JAN

<13 40+/-6 1771+/-140 FEB

<9 18+/-3 1562+/-89 MAR

<14 48+/-7 2444+/-159 APR

<13 55+/-7 2364+/-152 MAY

<12 58+/-7 2649+/-162 JUN

<8 66+/-5 2100+/-109 JUL

<15 46+/-7 2201+/-155 AUG

<16 33+/-7 1957+/-148 SEP

<12 179+/-11 2165+/-140 OCT

<6 39+/-3 2660+/-114 NOV

<8 41+/-4 1610+/-87 DEC

<14

<17 1984+/-135 The elevated Cs-137 values are a direct result of the Fukushima earthquake and tsunami event that occurred in 2011 and legacy weapons testing fallout and are not associated with CR-3 operation.

79 10 100 1000 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 pCi/Kilogram Broad Leaf Vegetation Cs-137 Cs-134 LLD

80 TABLE IV-D.4 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

CRYSTAL RIVER UNIT 3 DOCKET NO. 50-302 CITRUS COUNTY, FLORIDA JANUARY 1 TO DECEMBER 31, 2016 MEDIUM OR PATHWAY SAMPLED (UNITS)

ANALYSIS AND TOTAL NUMBER OF ANALYSES PERFORMED LOWER LIMIT OF DETECTION (LLD)1 ALL INDICATOR LOCATIONS MEAN RANGE LOCATION WITH HIGHEST MEAN NAME MEAN DISTANCE & BEARING RANGE CONTROL LOCATION MEAN RANGE NUMBER OF NONROUTINE REPORTED MEASUREMENTS WATERMELON Spec 1 (pCi/kg)

Cs-134 3

< LLD None 0

Cs-137 4

< LLD None 0

CITRUS Spec 2 (pCi/kg)

Cs-134 7

<LLD None 0

Cs-137 11

<LLD

(

None 0

1The "a priori" LLD which meets or exceeds the requirements of Table 2-9 of the CR-3 ODCM.

81 TABLE IV-D.4.a DUKE ENERGY FLORIDA, LLC-CR3 - 2016 pCi/kg OF EMITTERS IN WATERMELON AND CITRUS STATION MONTH Cs-134 Cs-137 K-40 C04 - Watermelon June

<3

<4 1131+/-50 C19 - Citrus January

<7

<11 1759+/-100

3F0417-02, Submittal of 2016 Annual Radiological Environmental Operating Report

Contents

Text

Subject:

Dear Sir:

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

Navigation menu

3F0417-02, Submittal of 2016 Annual Radiological Environmental Operating Report

Text

Subject:

Dear Sir:

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

Navigation menu

Search