3F0525-01, 2024 Annual Radiological Environmental Operating Report
| ML25127A372 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 05/07/2025 |
| From: | Van Sicklen H ADP CR3 |
| To: | Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation, Document Control Desk |
| References | |
| 3F0525-01 | |
| Download: ML25127A372 (1) | |
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ADPCR3,LLC Crystal River Nuclear Plant 15760 W. Power Line Street Crystal River, FL 34428 Docket 50-302 Docket 72-1035 Operating License No. DPR-72 ODCM May 7, 2025 3F0525-01 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001
Subject:
Crystal River Unit 3 - 2024 Annual Radiological Environmental Operating Report
Dear Sir or Madam:
ADP CR3, LLC hereby provides the 2024 Annual Radiological Environmental Operating Report for Crystal River Unit 3 in accordance with 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, 2024 through December 31, 2024.
This letter contains no new regulatory commitments.
If you have any questions regarding this submittal, please contact Mr. Craig Miller, ISFSI Licensing Manager, at (352) 634-3954.
Holly Van Sicklen ISFSI Manager HVS/clm : 2024 Annual Radiological Environmental Operating Report cc:
NMSS Project Manager Regional Administrator, Region I
ADP CR3, LLC DOCKET NUMBER 50-302 / 72-1035 LICENSE NUMBER DPR-72 ATTACHMENT 1 2024 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT
ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT 2024 ADP CR3, LLC CRYSTAL RIVER UNIT 3
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................................................................................................. 13 A. Airborne Pathway.......................................................................................... 13 Statistical Summary....................................................................................... 14 B. Direct Radiation............................................................................................. 21 Statistical Summary....................................................................................... 22 C. Waterborne Pathway..................................................................................... 25
- 1. Seawater................................................................................................. 25 Statistical Summary................................................................................ 28
- 2. Semiannual Ground Water..................................................................... 25 Statistical Summary................................................................................ 32
- 3. Site Ground Water.................................................................................. 25 Statistical Summary................................................................................ 35
- 4. Site Ground Water Non-REMP.............................................................. 26 Statistical Summary................................................................................ 54
- 5. Drinking Water........................................................................................ 26 Statistical Summary................................................................................ 59
- 6. Shoreline Sediment................................................................................. 27 Statistical Summary................................................................................ 62
- 7. NEI 07-07 Evaluation............................................................................. 27 D. Ingestion Pathway......................................................................................... 65
- 1. Carnivorous Fish..................................................................................... 65 Statistical Summary................................................................................ 68
- 2. Oysters.................................................................................................... 65 Statistical Summary................................................................................ 71
- 3. Broad Leaf Vegetation............................................................................ 66 Statistical Summary................................................................................ 74
- 4. Watermelon, Milk and Citrus................................................................... 67 Statistical Summary................................................................................ 78
ii INTRODUCTION This report is submitted as required by procedure CP-500: Special Actions and Reporting Requirements, Section 4.2.1.a, and the Offsite Dose Calculation Manual (ODCM).
The following information is required to be included in this report:
- Data Summaries
- Interpretations
- Unachievable LLDs (if any)
- 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.
- Inter-laboratory 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 decided 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 placed the facility in a SAFSTOR status until Sept 30th, 2020. Beginning on October 1st, 2020, the site radiological license was transferred from Duke Energy to ADP CR3, LLC and active decommissioning commenced. Also in 2020, CR3 received approval from the NRC to reduce the licensed area of the site to 884 acres as part of the Partial Site Release project. This had no effect on any REMP sample location or REMP sample frequency. Additionally, all spent nuclear fuel was transferred from the spent fuel pool to the onsite Independent Spent Fuel Storage Installation (ISFSI) for dry storage in January 2018. As of March 2025, most plant systems have been abandoned or removed.
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 2024 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.
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 is shown on 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 intake pathway. Additionally, the Florida aquifer groundwater flows in a west-southwest direction across the site toward the Gulf of Mexico, and since the location 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.
Trace levels of Cs-137 are still occasionally seen in vegetation samples due to past global fallout. The vegetation control sample station located in Orlando Florida is also experiencing similar Cs-137 deposition on the broad leaf sample media. Traces of Cs-137 can also be detected occasionally in soil/sediment for the same reason.
The results of the 2024 REMP samples 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, CR3 plant related radioactive material is occasionally quantified in water and sediment samples which are taken in the discharge canal near the liquid release discharge point. Some groundwater samples also show trace amounts of tritium. 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 may be plotted on the same line to best illustrate any trend.
Statistical summary pages are provided for each medium or pathway, consistent in format with NRC BTP An Acceptable Radiological Environmental Monitoring Program, 1979. 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 above LLD.
2 TABLE I-1 ADP CR3, LLC-2024 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 C14G W
2.0 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)
ADP CR3, LLC-2024 SAMPLE STATION LOCATIONS SAMPLE MEDIA STATION ID DIRECTION DISTANCE (Miles)
AIR 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
2.0 C13-Control WSW 3.4 GROUND WATER SITE GROUND WATER C40-Control CR3-1 CR3-2 CR3-3S and 3D CR3-4 CR3-5 CR3-6S and 6D CR3-7 CR3-8 CR3-9 CR3-10 E
E E
WNW WNW NW NNE 3.7 0.1 0.1 0.1 0.1 0.05 0.04 0.06 0.07 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
2.0 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 ADP CR3, LLC-2024 SAMPLING AND ANALYSIS PROGRAM SAMPLE MEDIA
- OF STATIONS FREQUENCY ANALYSIS LLD1 TLD 32*
Quarterly Dose Air Particulate 5
Weekly Gross 0.01 pCi/m3 Quarterly Spec :
Cs-134 0.05b Cs-137 0.06b Seawater 3
Monthly Tritium 2000a pCi/L Monthly Spec :
Co-60 15 Cs-134 15 Cs-137 18 Ground Water 1
Semiannual Tritium 2000a pCi/L Semiannual Spec :
2 2
Site Ground Water3 Drinking Water 9
3 Quarterly Quarterly Quarterly Tritium Spec :
Tritium 2
2000a pCi/L 2
2000a 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 1 The maximum "a priori" LLD listed in the ODCM 2 Same as Seawater Gamma () Spec 3 Additional 2 stations reported that are not required by the ODCM a LLD for drinking water. If no drinking water pathway exists, a value of 3000 pCi/L may be used b LLDs apply only to quarterly composite gamma spectral analysis, not to analyses of single particulate filters
5 TABLE I-2 (Cont'd)
ADP CR3, LLC-2024 SAMPLING AND ANALYSIS PROGRAM SAMPLE MEDIA
- OF STATIONS FREQUENCY ANALYSIS LLD1 Carnivorous Fish 2
Quarterly Spec :
Co-60 130 pCi/kg and Oysters 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
1 The maximum "a priori" LLD 2 ---Not Used ---
3 When available 4 During harvest 5 Same as broad leaf vegetation
6 Airborne Releases Liquid Releases Radiation Sediments FIGURE I-1: Environmental Media and Exposure Pathways Air Ground Water Drinking Water Food Crops External Radiation Sediments Aquatic Animals Seawater Man
7 FIGURE I-2: Environmental Monitoring Sample Stations (non-TLDs) Outlying Areas
8 Figure I-3 Environmental Monitoring Locations Site and Adjacent Areas
9 FIGURE I-4: Environmental Monitoring TLD Locations (off site)
C18 C03 C79 C01 C04 C74 C40 C14G C75 C76 C08 C77 C09 CRYSTAL KINGS BAY PLANT SITE C40 CROSS-FLORIDA BARGE CANAL WITHLACOOCHEE RIVER LAKE ROUSSEAU US 19
10 Figure I-5: CR3 Groundwater Monitoring Well Locations Deep Wells Are Also Installed at #s 1, 3, 6
11 II. LAND-USE CENSUS A land-use census took place during the month of June 2024. The purpose of the 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. No milk-producing animals were found within a 5-mile radius of the plant, same as in 2023. There were no active gardens identified within 5 miles of CR3, same as in 2023.
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 E
2.4 @ 92º ESE 4.2 @ 102º SE 4.8 @ 133º SSE 3.5 @ 149º S
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). A cross-check water tritium sample was obtained from an accredited testing lab (ERA). For 2024, all results for radionuclides potentially present at CR3 that are analyzed by DOH were within the indicated Acceptance Ranges, as shown below.
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".
MAPEP Series 49 Results for 2024:
Media Nuclide Result
% Bias Acceptance Range Flag Air Filter Cs-134
-0.006 False Positive Test A
Air Filter Cs-137 1.424
-3.8 1.04-1.92 A
Air Filter Co-60 1.56
-4.9 1.15-2.13 A
Soil Cs-134 398.05
-1.5 283-525 A
Soil Cs-137 1473.0
-5.0 1085-2015 A
Soil Co-60 618
-6.4 462-858 A
Vegetation Cs-134 3.699 0.8 2.57-4.77 A
Vegetation Cs-137 2.63 2.3 1.80-3.34 A
Vegetation Co-60 2.75
-7.1 12.07-3.85 A
Water Cs-134
-0.105 False Positive Test A
Water Cs-137 10.227 5.4 6.8 - 12.6 A
Water Co-60 10.17
-1.0 7.19-13.35 A
Water
- H-3 20901
-1.9 18200 - 24400 A
- Tritium sample from ERA lab - Study RAD-137
13 IV-A. AIRBORNE PATHWAY Air samples are currently taken at three locations near 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 gross beta samples. Offsite air sample location C07 in downtown Crystal River was retired as part of the REMP downsizing, consistent with the reduced source term at CR3 due to ongoing decommissioning activities. Similarly, offsite sample location C18 in Yankeetown was discontinued in late 2024 after also experiencing hurricane damage.
Tables IV-A.2 and IV-A.3 provide the results for each weekly air sample.
In 2024, 247 particulate samples were analyzed for gross beta activity, and all 247 had measurable activity above LLD. The average indicator concentration for collected samples was 18 pCi/1000 m3 with a range of 4 to 39 pCi/1000 m3. In 2023, the average indicator concentration for collected samples was 20 pCi/1000 m3 with a range of 10 to 39 pCi/1000 m3. The average indicator concentration since 1996 has been in the range of 14 to 24 pCi/1000 m3. The control location concentration for 2024 averaged 16 pCi/1000 m3, with a range of 3 to 39 pCi/1000 m3. The control location in 2023 averaged 17 pCi/1000 m3. In 2024, location C41 also had the highest yearly indicator concentration at 19 pCi/1000 m3. In 2023, location C41 had the highest yearly indicator concentration also at 19 pCi/1000 m3. In summary, the 2024 gross beta air sample results are consistent with past results.
Quarterly gamma composite data are summarized in Table IV-A.3. In 2024, measurable quantities of Cs-137 were not identified in any particulate filter sample. The highest Cs-137 LLD was 1.9 pCi/1000 m3, versus 1.7 pCi/1000 m3 in 2023.
The 2024 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 REMP report submitted for Crystal River Unit 3.
There were two instances of weekly air samples that were not collected in 2024. They were identified during the routine weekly sample change-outs and documented in Certrec Condition Report 2022000004: REMP Program Tracking for 2024.
- 1. C46: Week of January 23rd - Pump failure
- 2. C18: Retired offsite sample location in 4th quarter due to hurricane damage and CR3 site status The yearly percentages of missed or partial air samples, not counting the fourth quarter for C18, was 1.0 % of the total indicator samples (2 out of 195). This is slightly less than the aveage historical missed sample percentages.
14 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, 2024 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 247 6.0 18 (195/195)
C41 19 (52/52) 16 (52/52) 0 PARTICULATES (4-39) 0.4 miles SW (14-23)
(3-39)
(pCi/1000m3 for Spec 24 Gross,
pCi/1000m3 for Cs-134 0.8
<LLD
<LLD 0
Spec)
Cs-137 1.1
<LLD
<LLD 0
1The "a priori" LLD which meets or exceeds the requirements of Table 2-5 of the CR-3 ODCM.
15 TABLE IV-A.2 ADP CR3, LLC - 2024 pCi/1000 m3 GROSS BETA IN AIR SAMPLE SITE Collection Date C18 C40 C41 C46 C47 04-Jan-24 36 34 33 30 22 10-Jan-24 30 24 26 20 25 18-Jan-24 26 22 27 22 21 23-Jan-24 21 22 21 (A) 19 30-Jan-24 7
7 7
6 6
06-Feb-24 21 17 19 12 12 14-Feb-24 14 15 10 11 9
20-Feb-24 24 18 23 23 18 27-Feb-24 22 23 25 20 17 06-Mar-24 16 17 16 18 18 12-Mar-24 16 17 12 10 13 20-Mar-24 28 22 21 23 22 27-Mar-24 36 34 33 30 22 Average:
22 20 20 18 17 (A) Pump not working
16 TABLE IV-A.2 (Contd)
ADP CR3, LLC - 2024 pCi/1000 m3 GROSS BETA IN AIR SAMPLE SITE Collection Date C18 C40 C41 C46 C47 03-Apr-24 16 18 19 18 20 11-Apr-24 16 16 12 13 12 17-Apr-24 17 14 16 13 15 25-Apr-24 27 25 26 28 23 02-May-24 18 15 11 17 14 10-May-24 24 13 24 19 18 15-May-24 38 31 38 39 39 23-May-24 24 20 22 20 20 30-May-24 17 12 16 16 14 06-Jun-24 16 15 19 14 13 14-Jun-24 23 24 17 26 19 21-Jun-24 10 14 15 11 14 27-Jun-24 20 16 13 19 15 Average 21 18 19 20 18
17 TABLE IV-A.2 (Cont'd)
ADP CR3, LLC - 2024 pCi/1000 m3 GROSS BETA IN AIR SAMPLE SITE Collection Date C18 C40 C41 C46 C47 01-Jul-24 14 16 15 25 16 08-Jul-24 18 20 18 16 19 16-Jul-24 23 23 22 27 17 23-Jul-24 24 29 26 24 22 29-Jul-24 26 31 24 27 22 07-Aug-24 17 17 13 14 15 13-Aug-24 25 25 28 26 27 21-Aug-24 19 21 16 21 15 26-Aug-24 13 17 19 14 16 04-Sep-24 26 21 25 25 25 11-Sep-24 9
6 12 11 12 17-Sep-24 18 14 12 14 16 23-Sep-24 20 20 20 19 17 Average 19 20 19 18 18
18 TABLE IV-A.2 (Cont'd)
ADP CR3, LLC - 2024 pCi/1000 m3 GROSS BETA IN AIR SAMPLE SITE Collection Date C40 C41 C46 C47 07-Oct-24 19 16 13 13 15-Oct-24 25 24 27 15 21-Oct-24 16 22 21 16 28-Oct-24 30 28 34 30 04-Nov-24 18 23 23 21 12-Nov-24 8
10 6
9 18-Nov-24 23 28 24 25 25-Nov-24 21 21 19 21 02-Dec-24 23 29 31 23 11-Dec-24 31 33 34 31 16-Dec-24 23 27 18 18 23-Dec-24 20 18 16 15 30-Dec-24 10 14 15 7
Average 21 23 22 19 Note: Offsite location C18 in Yankeetown retired beginning 4th quarter
19 TABLE IV-A.3 ADP CR3, LLC - 2024 pCi/1000 m3 GAMMA EMITTERS IN QUARTERLY COMPOSITES OF AIR PARTICULATES STATION NUCLIDE FIRST QUARTER SECOND QUARTER THIRD QUARTER FOURTH QUARTER C18 Be-7 114 118 58 K-40
<19
<13
<12.9 Cs-134
<0.9
<0.9
<0.9 Cs-137
<1.1
<1.2
<0.8 C40 Be-7 98.5 120 77.2 99 K-40
<14
<14
<15
<14 Cs-134
<0.9
<0.7
<0.7
<0.9 Cs-137
<1.2
<0.9
<0.8
<0.9 C41 Be-7 99.1 177 73 122 K-40
<16
<20
<14
<25 Cs-134
<0.9
<1.2
<0.9
<1.1 Cs-137
<1.1
<1.4
<0.7
<1.1 C46 Be-7 109 101 69 109 K-40
<23
<8.7
<21
<17 Cs-134
<1.1
<0.9
<1.5
<1.3 Cs-137
<1.4
<1.1
<1.9
<1.3 C47 Be-7 127 144 77 93 K-40
<17
<15
<13
<16 Cs-134
<0.8
<0.8
<0.9
<0.6 Cs-137
<1.1
<0.9
<0.8
<0.6
- Not collected
20
`
0.0001 0.001 0.01 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 2022 2024 pCi/m3 Airborne (highest values plotted)
Cs-137 LLD 2011 Measured Values due to Fukushima Event
21 IV-B. DIRECT RADIATION Direct radiation measurements (using TLDs) were taken at 31 locations surrounding the plant, and at one control location 78 miles from the site (C47). Of the 124 non-control quarterly TLDs, 123 were collected. Offsite location C07 was not collected in the fourth quarter 2024 due to damage caused by Hurricane Milton.
Table IV-B provides a statistical summary of the analytical results for 123 non-control TLDs collected throughout the year. The average measured dose of the non-control TLDs was 32 mrem in 2024 which is similar to recent years results as shown in the Direct Radiation trend graph.
Table IV-B.1 provides the results of the individual TLD measurements.
In 2024 the highest annual average on-site dose was at location C69 (SSW at 1610 feet) at 44 mrem. It is partially influenced by naturally occurring radioactive material (NORM) associated with residual on-site coal and nearby construction work. In 2023, the highest annual average on-site dose was at location C70 at 45 mrem. In 2022, the highest annual average on-site dose was 60.4 mrem at station C72 (NW of CR3 RB at 1600 feet). In 2021, the highest annual average on-site dose was 61 mrem at station C71 (WNW at 3600 feet). Location C71 was also the highest in 2020 at 55 mrem and in 2019 at 56 mrem. Station C72 is near the old helper cooling towers which was being demolished. The areas around locations C70, C71 and C72 were undergoing construction work associated with the Unit 1 & 2 coal plant demolition and other Duke Energy site improvement initiatives.
In 2024, the highest annual off-site dose was 34 mrem at station C18 (N at 5.3 miles). In 2023, the highest annual off-site dose was 40 mrem at station C40 (E at 3.5 miles). In 2022, the highest annual average off-site dose was 43.7 mrem, also at station C40. The highest annual average off-site dose in 2021 was 40 mrem at station C77 (SSE at 3.4 miles). C40 at 40 mrem was the highest offsite location in 2020. The control station (C47) average annual dose was 34.5 mrem in 2023 versus 36.9 mrem in 2022. The average for all stations (except control) was 35 mrem for 2023 versus 37 mrem for 2022. Direct radiation results in 2023 are like previous results and do not show any indication of a trend.
The Independent Spent Fuel Storage Installation (ISFSI) was loaded with spent fuel beginning June 2017 and completed January 2018. Calculations performed prior to fuel movement into dry storage, derived a conservative dose rate at ~ 400 meters from the ISFSI pad of ~ 2.0 E-4 mrem/h gamma plus neutron (Ref. N16-0003, Table 11-27). The gamma component contributes most of the dose. The combined dose at 400 meters is ~
0.4 mrem for 90 days of exposure. 90 days is the approximate exposure period for REMP TLDs, and 400 meters is the approximate nearest distance from the ISFIS pad (center) for any of the REMP TLDs (e.g. C65). A review of quarterly TLD results shows that normal quarter to quarter variation in dose is greater than the dose increments due to ISFSI.
22 TABLE IV-B RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM
SUMMARY
CRYSTAL RIVER UNIT 3 DOCKET NO. 50-302 CITRUS COUNTY, FLORIDA JANUARY 1 TO DECEMBER 31, 2024 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, 127 15 32 (123/123)
(18 - 57)
C69 44 (4/4) 0.3 mile @ SSW (27 - 57) 33 (4/4)
(25 - 42) 0
23 TABLE IV-B.1 ADP CR3, LLC-2024 Annual Gamma () Dose (mrem)
TLD STATION Quarter 1
2 3
4 C01 31 19 23 32 C03 31 21 24 29 C04 31 21 25 27 C07 31 18 23 C08 33 21 25 33 C09 33 24 26 31 C14G 42 21 25 40 C18 38 28 33 36 C27 40 24 28 36 C40 39 25 29 39 C41 36 25 29 32 C46 39 23 26 38 C47 (CONTROL) 42 25 30 36 C60 42 25 30 40 C61 42 29 33 39 C62 39 19 32 38 C63 44 26 30 41 C64 42 25 37 39 C65 42 30 30 42 C66 42 25 32 35 C67 44 27 30 38 C68 48 25 32 47 C69 57 27 38 53 C70 40 31 45 38 C71 37 37 32 35 C72 29 26 26 28 C73 37 25 23 36 C74 34 20 28 32 C75 27 25 26 32 C76 34 22 21 31 C77 44 18 25 34 C79 42 23 30 40
- Missing
24 10 100 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 2022 2024 mrem Direct Radiation TLD Average of All Stations See CR 684849
25 IV-C. WATERBORNE PATHWAY To evaluate the waterborne pathway, samples are taken of seawater, groundwater, 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 2024, of twenty-four indicator samples, one had measurable tritium above LLD values - sample C14H on March 6th had a value of 9645 pCi/liter. The sample was taken at the head of the discharge canal during a permitted liquid effluent release which contained tritium. The average tritium value for all twelve monthly samples at C14H, when including the LLD results of the other 11 monthly sample results, was 930 pCi/liter Gamma spectral analysis was performed on all thirty-six samples, (including the 12 control samples at C13) and none of them showed measurable amounts of the gamma emitters of licensed CR3 radionuclides.
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 3.7 miles east of CR-3. It is taken as a control reference background and is upstream of the groundwater flow gradient from CR3. Gamma spectral and tritium analyses are performed. In 2024, 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 groundwater is 2000 pCi/L. Analysis of groundwater in the vicinity of CR-3 is done at a sensitivity of approximately 135 pCi/L for tritium and less than around 4 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 (See Figure 1-5). The sampling of these wells follows the general guidance of NEI 07-07:
Groundwater Protection Initiative and was implemented starting in 2007. Historically 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 a contribution to 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. There are no other known leaking plant components.
In 2024, all groundwater wells were at or below the lower limits of detection (<135 pCi/liter) except for the fourth quarter sample for well CR3-5 which had 442 pCi/liter. The yearly average at CR3-5 was 212 pCi/L.
Well CR3-8 was not collected in the second quarter due to well damage and is documented in Condition Report (CR) 2022000004. In 2023, all ground water well samples were below LLD for tritium and gamma radionuclides. In 2022, one groundwater well - CR3 continued to show tritium at very low concentrations above LLD, same as in 2021. In 2022, one of the two collected samples from CR3-5 showed a value of 171 pCi/liter. Well CR3-5 had an average tritium concentration of 183 pCi/L in 2021 based on all four quarterly samples. It showed an average of 227 pCi/l in 2020.
Along with these wells, two other wells that are not presently part of the REMP program were 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. In 2023, the percolation ponds were retired and backfilled.
The first quarter well samples at locations MWC-IF2 and MWC-27, and second quarter sample at MWC-IF2, were not collected due to the wells being dry. Well CR3-8 was not collected in the second quarter due to damage to the well casing, which was fixed in time for the third quarter sample. These missed samples are documented in Condition Report (CR) 2022000004.
26 IV-C. WATERBORNE PATHWAY Contd As already noted, site ground water flows in a west-southwest direction toward the Gulf of Mexico. This flow was re-verified in 2022 after the ISFSI pad sub-surface construction was completed, with a new ground water flow study.
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.
- 4. Quarterly non-REMP required well samples at two locations were collected as discussed in item #3 above.
These two wells are located on the north side and the south side of the site percolation ponds. The information is discussed above. Both wells showed no measurable amounts of any other gamma emitting radionuclides of concern. The tritium concentration in these wells has 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. In 2024, SDT-1 and its associated piping were removed, and the settling ponds were retired.
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 supplemental non-REMP required samples.
- 5. 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. All samples are Control samples.
In 2024, none of the samples yielded measurable activities of tritium or the required gamma emitters, same as in 2023. The measurement sensitivity for drinking water samples is the same as those for ground water samples.
Since the beginning of sampling, the drinking water samples have not had any 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.
27 IV-C. WATERBORNE PATHWAY Contd
- 6. 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 sample from location C14G was not available in the second half of the year due to ongoing construction work. The plant discharge canal is the liquid effluent release pathway from CR-3.
In 2024, all eight collected samples showed Cs-134 and Cs-137 less than LLD. One of the six indicator location samples (C14G - 4th quarter) showed positive Co-60 at 15 pCi/kg. In 2023, two of five collected indicator samples showed Cs-137 above LLD and four out of five showed positive indications for Co-60. It is not unexpected to see licensed material in the discharge canal as CR3 still makes permitted liquid releases to the canal.
The 2024 results are similar to previous years results given the very low levels of licensed material identified.
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.
- 7. There were no unmonitored spills or releases of radioactive material in 2024 that had 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.
28 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, 2024 MEDIUM OR PATHWAY SAMPLED (UNITS)
ANALYSIS AND TOTAL NUMBER OF ANALYSES PERFORMED LOWER LIMIT OF DETECTION (LLD)1 ALL INDICATOR LOCATIONS MEAN RANGE 2LOCATION WITH HIGHEST MEAN NAME MEAN DISTANCE & BEARING RANGE CONTROL LOCATION MEAN RANGE NUMBER OF NONROUTINE REPORTED MEASUREMENTS SEAWATER (pCi/L)
Tritium, 36 172 All <LLD, except for first quarter C14H at 9,645 pCi/L, sampled during permitted release
-- C14H 0.1 mile NW --
All quarters <LLD except 1st quarter at 9,645 All <LLD 0
Spec, 36 Co-60 4
<LLD
<LLD 0
Cs-134 4
<LLD
<LLD 0
Cs-137 4
<LLD
<LLD 0
1The "a priori" LLD which meets or exceeds the requirements of Table 2-5 of the CR-3 ODCM.
2 Only one sample showed greater than LLD tritium - March 6th sample at location C14H during permitted liquid release
29 TABLE IV-C.1.a ADP CR3, LLC-2024 pCi/L GAMMA EMITTERS AND TRITIUM IN SEAWATER STATION MONTH H-3 K-40 Co-60 Cs-134 Cs-137 C13 JAN
<134 201 +/- 32
<6
<5
<6 FEB
<136 211 +/- 28
<4
<4
<5 MAR
<139 236 +/- 22
<3
<3
<3 APR
<135 175 +/- 20
<3
<3
<3 MAY
<136 253 +/- 27
<5
<4
<4 JUN
<132 227 +/- 22
<4
<4
<4 JUL
<141 258+/-34
<6
<4
<5 AUG
<138 206 +/- 25
<4
<4
<5 SEP
<140 302 +/- 25
<4
<4
<4 OCT
<142 191+/-28
<6
<5
<6 NOV
<142 238+/-22
<3
<3
<4 DEC
<142 233+/-29
<5
<4
<5 C14G JAN
<134 235 +/- 31
<6
<5
<6 FEB
<136 247 +/- 33
<6
<6
<6 MAR
<137 295 +/- 24
<3
<4
<4 APR
<135 224 +/- 22
<4
<3
<4 MAY
<136 244 +/- 27
<5
<4
<4 JUN
<132 244 +/- 35
<6
<5
<6 JUL
<141 286 +/- 28
<5
<4
<4 AUG
<138 232 +/- 26
<5
<4
<5 SEP
<140 334 +/- 27
<4
<4
<3 OCT
<142 197+/-25
<5
<4
<4 NOV
<142 285+/-35
<6
<6
<5 DEC
<142 280+/-24
<3
<3
<4
30 TABLE IV-C.1a (CONT'D)
ADP CR3, LLC-2024 pCi/L GAMMA EMITTERS AND TRITIUM IN SEAWATER STATION MONTH H-3 K-40 Co-60 Cs-134 Cs-137 C14H JAN
<134 126 +/- 22
<4
<4
<5 FEB
<136 299 +/- 34
<5
<5
<6 MAR 9645 +/-
144 121 +/- 21
<4
<4
<5 APR
<135
<96
<6
<5
<6 MAY
<136 211 +/- 20
<3
<4
<3 JUN
<132 207 +/- 27
<4
<4
<5 JUL
<141 169 +/- 18
<3
<4
<4 AUG
<138
<50
<3
<3
<3 SEP
<140 299 +/- 34
<6
<4
<5 OCT
<140 239+/-31
<6
<6
<8 NOV
<140 276+/-35
<6
<5
<6 DEC
<140 225+/-21
<4
<5
<4
31 1
10 100 1000 10000 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 2022 2024 pCi/Liter Seawater H-3 Cs-134 LLD Cs-137 LLD measured values measured values
32 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, 2024 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, 2 172
<LLD
<LLD 0
WATER2 (pCi/L)
Spec, 2 Co-60 4
<LLD
<LLD 0
Cs-134 4
<LLD
<LLD 0
Cs-137 4
<LLD
<LLD 0
1The "a priori" LLD which meets or exceeds the requirements of Table 2-5 of the CR-3 ODCM.
2 There is no drinking water intake pathway at the Crystal River site. This location (C40) is used as the groundwater background.
33 TABLE IV-C.2.a ADP CR3, LLC-2024 pCi/L GAMMA EMITTERS AND TRITIUM IN GROUND WATER STATION NUCLIDE FIRST HALF SECOND HALF C40 H-3
<135
<138 Co-60
<3
<5 Cs-134
<3
<5 Cs-137
<4
<5 K-40
<42
<68
34 1
10 100 1000 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 2022 2024 pCi/L Semi-Annual Ground Water H-3 LLD Cs-137 LLD
35 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, 2024 MEDIUM OR PATHWAY SAMPLED (UNITS)
ANALYSIS AND TOTAL (NUMBER)
OF ANALYSES PERFORMED LOWER LIMIT OF DETECTION (LLD)1,2 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 51 172 212 (1/51)
CR3-5 0.05 mile SSW C40 0
GROUND WATER
(<LLD-441) 212 (<LLD-441)
<LLD (pCi/L)
Spec 51 Co-60 42
<LLD 0
Cs-134 42
<LLD 0
Cs-137 42
<LLD 0
1The "a priori" LLD which meets or exceeds the requirements of Table 2-5 of the CR-3 ODCM.
2 Several samples had higher LLD values (due to high K-40) but still met or exceeded ODCM limits
36 TABLE IV-C.3.a.1 ADP CR3, LLC-2024 pCi/L GAMMA EMITTERS AND TRITIUM IN CR3 SITE GROUND WATER STATION DATE H-3 K-40 Co-60 Cs-134 Cs-137 CR3-1D 01-25
<135
<84
<5
<5
<5 04-17
<137
<55
<3
<4
<4 07-02
<140
<50
<4
<4
<4 10-16
<142
<56
<3
<4
<4 CR3-1S 01-25
<138
<49
<4
<4
<4 04-17
<148
<45
<4
<4
<4 07-02
<140
<67
<4
<5
<6 10-16
<142
<50
<3
<4
<3 CR3-2 01-25
<135
<81
<5
<6
<6 04-17
<138 30
<4
<4
<5 07-02
<140
<70
<6
<5
<6 10-16
<142
<81
<5
<5
<5
37 TABLE IV-C.3.a.1 ADP CR3, LLC-2024 pCi/L GAMMA EMITTERS AND TRITIUM IN CR3 SITE GROUND WATER STATION DATE H-3 K-40 Co-60 Cs-134 Cs-137 CR3-3D 01-25
<133
<43
<3
<3
<3 04-17
<138
<90
<5
<5
<5 07-02
<141
<89
<7
<6
<7 10-16
<142
<64
<4
<5
<4 CR3-3S 01-25
<135
<38
<3
<4
<4 04-17
<148
<43
<4
<4
<4 07-02
<142
<174
<15
<12
<15 10-16
<142
<84
<5
<5
<6 CR3-4 01-25
<135
<45
<4
<3
<4 04-17
<137
<68
<5
<6
<6 07-02
<140
<64
<5
<5
<5 10-16
<142
<71
<6
<4
<5
38 TABLE IV-C.3.a.1 ADP CR3, LLC-2024 pCi/L GAMMA EMITTERS AND TRITIUM IN CR3 SITE GROUND WATER STATION DATE H-3 K-40 Co-60 Cs-134 Cs-137 CR3-5 01-25
<140
<78
<5
<5
<6 04-17
<137
<90
<6
<5
<6 07-02
<141
<61
<5
<5
<5 10-24 441
<48
<3
<4
<4 CR3-6S 01-25
<137 204
<5
<4
<4 04-18
<137
<73
<6
<6
<5 07-02
<140
<35
<4
<4
<4 10-16
<142
<54
<5
<4
<4 CR3-6D 01-25
<133 54
<5
<5
<5 04-18
<137 177
<3
<4
<4 07-02
<140
<82
<6
<6
<6 10-16
<142 250
<6
<6
<5
39 TABLE IV-C.3.a.1 (contd)
ADP CR3, LLC-2024 pCi/L GAMMA EMITTERS AND TRITIUM IN CR3 SITE GROUND WATER STATION DATE H-3 K-40 Co-60 Cs-134 Cs-137 CR3-7 01-25
<135
<61
<5
<4
<4 04-18
<137
<80
<5
<5
<5 08-13
<138
<86
<5
<6
<6 10-16
<142
<70
<6
<5
<6 CR3-8 01-25
<137
<65
<4
<4
<4 04-18 Well damage 07-02
<141
<58
<3
<4
<3 10-28
<142
<95
<6
<6
<6 CR3-9 01-25
<135
<82
<5
<5
<5 04-18
<137
<82
<5
<4
<7 07-27
<139
<62
<4
<5
<5 10-28
<142
<49
<3
<4
<4
40 TABLE IV-C.3.a.1 (contd)
ADP CR3, LLC-2024 pCi/L GAMMA EMITTERS AND TRITIUM IN CR3 SITE GROUND WATER STATION DATE H-3 K-40 Co-60 Cs-134 Cs-137 CR3-10 01-25
<135
<45
<4
<4
<4 04-18
<138
<50
<5
<5
<4 07-02
<141
<70
<3
<6
<4 10-16
<142
<51
<4
<4
<4
41 80 100 120 140 160 180 200 04/01/12 08/14/13 12/27/14 05/10/16 09/22/17 02/04/19 06/18/20 10/31/21 03/15/23 07/27/24 12/09/25 pCi/l Tritium Measurement GW Well # CR3-1S All results are < LLD since 2010
42 80 100 120 140 160 180 200 04/01/12 08/14/13 12/27/14 05/10/16 09/22/17 02/04/19 06/18/20 10/31/21 03/15/23 07/27/24 12/09/25 pCi/l Tritium Measurement GW Well # CR3-1D All results are < LLD
43 80 100 120 140 160 180 200 04/01/12 08/14/13 12/27/14 05/10/16 09/22/17 02/04/19 06/18/20 10/31/21 03/15/23 07/27/24 12/09/25 pCi/l Tritium Measurement GW Well # CR3-2 All results are < LLD (Missing some data from 2022 and 2023 due to inaccessibility)
44 80 100 120 140 160 180 200 04/01/12 08/14/13 12/27/14 05/10/16 09/22/17 02/04/19 06/18/20 10/31/21 03/15/23 07/27/24 12/09/25 pCi/l Tritium Measurement GW Well # CR3-3S All results are < LLD unless noted
45 80 100 120 140 160 180 200 04/01/12 08/14/13 12/27/14 05/10/16 09/22/17 02/04/19 06/18/20 10/31/21 03/15/23 07/27/24 12/09/25 pCi/l Tritium Measurement GW Well # CR3-3D All results are < LLD
46 60 80 100 120 140 160 180 200 10/10/06 07/06/09 04/01/12 12/27/14 09/22/17 06/18/20 03/15/23 12/09/25 pCi/l Tritium Measurement GW Well # CR3-4 All results are < LLD since 2013
47 0
200 400 600 800 1000 1200 1400 1600 1800 2000 10/10/06 07/06/09 04/01/12 12/27/14 09/22/17 06/18/20 03/15/23 12/09/25 pCi/l Tritium Measurement GW Well # CR3-5
48 60 80 100 120 140 160 180 200 10/10/06 07/06/09 04/01/12 12/27/14 09/22/17 06/18/20 03/15/23 12/09/25 pCi/l Tritium Measurement GW Well # CR3-6S Results after 2014 are < LLD
49 50 70 90 110 130 150 170 190 210 230 250 10/10/06 07/06/09 04/01/12 12/27/14 09/22/17 06/18/20 03/15/23 12/09/25 pCi/l Tritium Measurements GW Well # CR3-6D All results are < LLD after 2010
50 0
100 200 300 400 500 600 700 800 10/10/06 07/06/09 04/01/12 12/27/14 09/22/17 06/18/20 03/15/23 12/09/25 pCi/l Tritium Measurements GW Well # CR3-7 All measurements LLD after 2015
51 50 70 90 110 130 150 170 190 210 230 250 10/10/06 07/06/09 04/01/12 12/27/14 09/22/17 06/18/20 03/15/23 12/09/25 pCi/l Tritium Measurements GW Well # CR3-8 All measurments LLD after 2016
52 60 80 100 120 140 160 180 10/10/06 07/06/09 04/01/12 12/27/14 09/22/17 06/18/20 03/15/23 12/09/25 pCi/l Tritium Measurements GW Well # CR3-9 All measurements <LLD after 2013
53 60 80 100 120 140 160 180 200 10/10/06 07/06/09 04/01/12 12/27/14 09/22/17 06/18/20 03/15/23 12/09/25 pCi/l Tritium Measurements GW Well # CR3-10 All measurements LLD after 2012
54 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, 2024 MEDIUM OR PATHWAY SAMPLED (UNITS)
ANALYSIS AND TOTAL NUMBER OF ANALYSES PERFORMED LOWER LIMIT OF DETECTION (LLD)1,2 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 5 135
<LLD MWC-27 (0/4) 0 GROUND WATER 0.30 mi.@266° (<LLD)
(pCi/L)
Spec 5 Co-60 52
<LLD 0
Cs-134 52
<LLD 0
Cs-137 52
<LLD 0
1 These DOH average reported LLDs meet or exceed the requirements of Table 2-5 of the CR-3 ODCM.
2 Several samples had higher LLD values reported
- Non-REMP required samples (Locations MWC-IF2 and MWC-27)
- REMP location C-40 is the site background. All C-40 results are <LLD
55 TABLE IV-C.4.a ADP CR3, LLC-2024 pCi/L GAMMA EMITTERS AND TRITIUM IN CR3 SITE GROUND WATER (SUPPLEMENTAL DATA)
STATION DATE H-3 K-40 Co-60 Cs-134 Cs-137 MWC-27*
01-27 Not Collected 04-18
<137 192
<4
<4
<4 07-27
<141 227
<7
<5
<6 10-16
<142
<52
<3
<4
<4
- These wells are not officially included in the REMP and are located on either side (north and south) of the site percolation ponds.
56 TABLE IV-C.4.a (contd)
ADP CR3, LLC-2024 pCi/L EMITTERS AND TRITIUM IN CR3 SITE GROUND WATER (SUPPLEMENTAL DATA)
STATION DATE H-3 K-40 Co-60 Cs-134 Cs-137 MWC-IF2 01-27 Not Collected 04-18 Not Collected 07-27
<139
<52
<4
<4
<4 10-16
<142
<52
<3
<4
<4
- These wells are not officially included in the REMP and are located on either side (north and south) of the site percolation ponds.
Note: Samples for first and fourth quarters were not available due to nearby construction work.
57 0
200 400 600 800 1000 1200 1400 10/10/06 07/06/09 04/01/12 12/27/14 09/22/17 06/18/20 03/15/23 12/09/25 pCi/l Tritium Measurements GW Well # MWC-27 All measurements LLD after 2010
58 0
100 200 300 400 500 600 10/10/06 07/06/09 04/01/12 12/27/14 09/22/17 06/18/20 03/15/23 12/09/25 pCi/l Tritium Measurements GW Well # MWC-IF2 All measurements LLD after 2012
59 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, 2024 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 12 172
< LLD
<LLD 0
WATER (pCi/L)
Spec 12 Co-60 4
< LLD
<LLD 0
Cs-134 4
< LLD
<LLD 0
Cs-137 4
< LLD
<LLD 0
1The "a priori" LLD which meets or exceeds the requirements of Table 2-5 of the CR-3 ODCM.
60 TABLE IV-C.5.a ADP CR3, LLC-2024 pCi/L GAMMA EMITTERS AND TRITIUM IN DRINKING WATER STATION DATE H-3 K-40 Co-60 Cs-134 Cs-137 C07 01-30
<137
<54
<4
<4
<5 04-09
<135
<70
<5
<5
<5 07-02
<136
<38
<3
<3
<3 10-16
<142
<63
<5
<5
<5 C10 01-30
<135
<83
<6
<4
<6 04-09
<135
<56
<5
<5
<5 07-02
<141
<62
<4
<4
<5 10-16
<142
<59
<5
<5
<5 C18 01-30
<135
<64
<5
<4
<5 04-09
<135
<74
<6
<4
<5 07-02
<141
<73
<5
<5
<5 10-16
<142
<34
<3
<3
<4
61 0.1 1
10 100 1000 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 2022 2024 pCi/Liter Quarterly Drinking Water H-3 LLD Cs-137 LLD
62 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, 2024 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 12
<LLD
<LLD 0
Cs-137 12
<LLD
<LLD 0
2Co-60 12 15 (1/6)
(<LLD-15)
C14G W 2.0 mile 15 (<LLD-15)
Only 1 sample > LLD
<LLD 0
1The "a priori" LLD which meets or exceeds the requirements of Table 2-5 of the CR-3 ODCM.
2 Co-60 not included in Table 2-5 of ODCM.
63 TABLE IV-C.6.a ADP CR3, LLC-2024 pCi/kg GAMMA EMITTERS IN SHORELINE SEDIMENT STATION PERIOD Co-60 Cs-134 Cs-137 K-40 C09 First Half
<6
<7
<8 260 Second Half
<8
<8
<9 361 C14H First Half
<11
<9
<10 197 Second Half
<21
<21
<19 853 C14M First Half
<19
<16
<18 488 Second Half
<18
<18
<20 676 C14G First Half
<14
<11
<14 264 Second Half 15
<13
<11 637
- Sample not obtained due to construction
64 1
10 100 1000 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 2022 2024 pCi/Kilogram Shoreline Sediment Cs-134 LLD Cs-137
65 IV-D. INGESTION PATHWAY To evaluate the ingestion pathway, samples are taken of fish, oysters, broad leaf vegetation, citrus, milk 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 2024, none of the required radionuclides were found in measurable quantities. The highest Cs-137 LLD for stations C29 and C30 was 24 pCi/kg. Naturally occurring K-40 was quantified in all eight samples at an average concentration of 2,645 pCi/kg.
In 2023, none of the required radionuclides were found in measurable quantities.
In 2022, none of the required radionuclides were found in measurable quantities.
In 2021, none of the required radionuclides were found in measurable quantities.
In 2020, none of the required radionuclides were found in measurable quantities.
In 2019, none of the required radionuclides were found in measurable quantities.
In 2018, none of the required radionuclides were found in measurable quantities.
In 2017, none of the required radionuclides were found 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 2024, none of the required radionuclides were found in measurable quantities. The highest Cs-137 LLD was 38 pCi/kg. K-40 was quantified in all 7 collected samples with an average concentration of 1085 pCi/kg. The second quarter sample at location C29 could not be collected due to the absence of oysters at that time.
In 2023, none of the required radionuclides were found in measurable quantities.
In 2022, none of the required radionuclides were found in measurable quantities. Only two samples could be collected at location C30 and three sample at C29 due to lack of oysters.
In 2021, none of the required radionuclides were found in measurable quantities.
In 2020, none of the required radionuclides were found in measurable quantities.
In 2019, none of the required radionuclides were found in measurable quantities.
In 2018, none of the required radionuclides were found in measurable quantities.
In 2017, none of the required radionuclides were found in measurable quantities.
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.
66
- 3. Monthly broad leaf vegetation samples were taken at two indicator locations, C48A and C48B, and one control location, C47.
In 2024, 13 out of the 24 indicator locations (C48A and C48B) had measurable amounts of Cs-137 with an average concentration of 60 pCi/kg and a range of 22 to 192 pCi/kg. The control station (C47) located in Orlando; Fl. also had measurable amounts of Cs-137 in 7 of 12 samples ranging from 11 to 22 pCi/kg. The results are similar to 2023 results.
In 2023, 11 out of the 24 indicator locations (C48A and C48B) had measurable amounts of Cs-137 with an average concentration of 102 pCi/kg and a range of 47 to 252 pCi/kg. The control station (C47) located in Orlando; Fl. also had measurable amounts of Cs-137 in 7 of 12 samples ranging from 14 to 127 pCi/kg. The results are similar to 2022 results.
In 2022, 11 out of the 24 indicator locations (C48A and C48B) had measurable amounts of Cs-137 with an average concentration of 82 pCi/kg and a range of 22 to 345 pCi/kg. The control station (C47) located in Orlando; Fl. also had measurable amounts of Cs-137 in 10 of 12 samples ranging from 21 to 80 pCi/kg. The results are similar to 2021 results.
In 2021, 11 out of the 24 indicator locations (C48A and C48B) had measurable amounts of Cs-137 with an average concentration of 83 pCi/kg and a range of 12 to 212 pCi/kg. The control station (C47) located in Orlando; Fl. also had measurable amounts of Cs-137 in 8 of 12 samples ranging from 10 to 96 pCi/kg. The results at location C48B are slightly greater than in 2020 mainly due to the July sample. The other samples at C48B were consistent with historical values. July was a very wet month and may have influenced the sample result. The K-40 result for July was also the highest of the year.
In 2020, 12 out of the 24 indicator locations (C48A and C48B) had measurable amounts of Cs-137 with an average concentration of 51 pCi/kg and a range of 10 to 116 pCi/kg. The control station (C47) located in Orlando; Fl. also had measurable amounts of Cs-137 in 10 of 12 samples ranging from 16 to 336 pCi/kg. These results are similar to those in 2019.
In 2019, 11 out of the 24 indicator locations (C48A and C48B) had measurable amounts of Cs-137 with an average concentration of 52 pCi/kg and a range of 6 to 329 pCi/kg. The control station (C47) located in Orlando; Fl. also had measurable amounts of Cs-137 in 7 of 12 samples ranging from 13 to 154 pCi/kg. These results are similar to those in 2018.
In 2018, 13 out of 24 indicator locations (C48A and C48B) had measurable amounts of Cs-137 with an average concentration of 27 pCi/kg and a range of 13 to 48 pCi/kg. The control station (C47) located in Orlando; Fl. also had measurable amounts of Cs-137. In 12 of 12 control station samples there were measurable amounts of Cs-137 with an average concentration of 111 pCi/kg and a range of 38 to 184 pCi/kg. These results are similar to those in 2017.
In 2017, 12 out of 24 indicator locations (C48A and C48B) had measurable amounts of Cs-137 with an average concentration of 30 pCi/kg and a range of 17 to 66 pCi/kg. The control station (C47) located in Orlando; Fl. also had measurable amounts of Cs-137. In 10 of 12 control station samples there were measurable amounts of Cs-137 with an average concentration of 99 pCi/kg and a range of 19 to 186 pCi/kg. These results are similar to those in 2016.
In 2016, 13 out of 24 indicator locations (C48A and C48B) had measurable amounts of Cs-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 Cs-137. In 10 of 12 control station samples there were measurable amounts of Cs-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.
Table IV-D.3 provides a statistical summary of the vegetation gamma spectroscopy results.
67
- 4. In 2024 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. Four milk samples were collected in 2024 and none of the required radionuclides were detected in any sample.
In 2023 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. There were also six milk samples collected in 2023, all at location C28. Location C28 is about 20 miles SSE of the plant. All showed less than LLD for Cs-134 and Cs-137. Milk samples are not required per the ODCM. This is no change from 2022.
In 2022 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. There were also four milk samples collected in 2022, all at location C28. Location C28 is about 20 miles SSE of the plant. All showed less than LLD for Cs-134 and Cs-137. Milk samples are not required per the ODCM. This is no change from 2021.
In 2021 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. There were also four milk samples collected in 2021, all at location C28. Location C28 is about 20 miles SSE of the plant. All showed less than LLD for Cs-134 and Cs-137. Milk samples are not required per the ODCM.
In 2020 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. There were also three milk samples collected in 2020, all at location C28. Location C28 is about 20 miles SSE of the plant. All showed less than LLD for Cs-134 and Cs-137. Milk samples are not required per the ODCM.
In 2019 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. There were also three milk samples collected in 2019, all at location C28. Location C28 is about 20 miles SSE of the plant. All showed less than LLD for Cs-134 and Cs-137. Milk samples are not required per the ODCM.
In 2018 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.
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.
68 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, 2024 MEDIUM OR PATHWAY SAMPLED (UNITS)
ANALYSIS AND TOTAL NUMBER OF ANALYSES PERFORMED LOWER LIMIT OF DETECTION (LLD)1, 2 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)
Co-60 22
<LLD
<LLD 0
Cs-134 22
<LLD
<LLD 0
Cs-137 22
<LLD
<LLD 0
1The "a priori" LLD which meets or exceeds the requirements of Table 2-5 of the CR-3 ODCM.
2 Some reported sample LLDs were higher due to limited sample mass
69 TABLE IV-D.1.a ADP CR3, LLC-2024 pCi/kg GAMMA EMITTERS IN CARNIVOROUS FISH STATION QUARTER Co-60 Cs-134 Cs-137 K-40 C29 1
<22
<21
<23 2670 2
<17
<17
<19 2410 3
<20
<17
<20 2990 4
<18
<13
<17 3120 C30 1
<20
<20
<20 2060 2
<15
<14
<18 2500 3
<23
<23
<24 2540 4
<15
<13
<15 2850
70 1
10 100 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 2022 2024 pCi/Kilogram Carnivorous Fish Cs-134 LLD Cs-137 LLD
71 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, 2024 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 7 (pCi/kg)
Co-60 25
<LLD
<LLD 0
Cs-134 25
<LLD
<LLD 0
Cs-137 25
<LLD
<LLD 0
1The "a priori" LLD which meets or exceeds the requirements of Table 2-5 of the CR-3 ODCM.
72 TABLE IV-D.2.a ADP CR3, LLC-2024 pCi/kg GAMMA EMITTERS IN OYSTERS STATION QUARTER Co-60 Cs-134 Cs-137 K-40 C29 1
<18
<16
<17 616 2
Not collected 3
<24
<18
<23 378 4
<18
<23
<24 783 C30 1
<15
<17
<19 780 2
<15
<14
<29 2500 3
<35
<35
<38 1460 4
<18
<23
<24 1080
73 10 100 1000 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 2022 2024 pCi/Kilogram Oysters Cs-137 LLD Cs-134 LLD
74 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, 2024 MEDIUM OR PATHWAY SAMPLED (UNITS)
ANALYSIS AND TOTAL NUMBER OF ANALYSES PERFORMED LOWER LIMIT OF DETECTION (LLD)1 ALL INDICATOR LOCATIONS 2MEAN RANGE LOCATION WITH HIGHEST MEAN NAME 2MEAN DISTANCE & BEARING RANGE CONTROL LOCATION 2MEAN RANGE NUMBER OF NONROUTINE REPORTED MEASUREMENTS BROAD LEAF VEGETATION Spec 36 (pCi/kg)
Cs-134 15
<LLD
<LLD 0
Cs-137 15 60 (13/24)
(22-192)
C48B 76 (9/12) 0.9 @ 73º (22-192) 17 (7/12)
(11-22) 0 1The "a priori" LLD which meets or exceeds the requirements of Table 2-5 of the CR-3 ODCM.
2 The mean includes LLD values. The Mean for Indicator locations, excluding LLD values, is 98 pCi/kg.
75 TABLE IV-D.3.a ADP CR3, LLC-2024 pCi/kg OF GAMMA EMITTERS IN BROAD LEAF VEGETATION STATION MONTH Cs-134 Cs-137 K-40 C47 JAN
<14
<15 2500 FEB
<12
<18 2620 MAR
<15
<13 3120 APR
<13 14 +/- 4 3060 MAY
<13 14 +/- 6 3040 JUN
<16 18 +/- 6 3250 JUL
<16
<25 3210 AUG
<16
<21 3830 SEP
<14 11 +/- 4 3190 OCT
<10 22 +/- 3 3110 NOV
<12 15 +/- 4 2260 DEC
<13 18 +/- 4 1860 C48A JAN
<20
<24 4580 FEB
<15
<16 7690 MAR
<12
<15 5980 APR
<9
<10 5490 MAY
<18 161 +/- 12 3110 JUN
<15 28 +/- 7 4370 JUL
<11 28 +/- 4 3140 AUG
<12
<14 4600 SEP
<9
<12 5330 OCT
<12 190 +/- 10 1700 NOV
<13
<13 4360 DEC
<12
<12 4910
76 TABLE IV-D.3.a (CONT'D)
ADP CR3, LLC-2024 pCi/kg OF GAMMA EMITTERS IN BROAD LEAF VEGETATION STATION MONTH Cs-134 Cs-137 K-40 C48B JAN
<15
<17 1750 FEB
<11
<14 1310 MAR
<15
<16 2520 APR
<10 68 +/- 6 2950 MAY
<18 166 +/- 11 3140 JUN
<14 90 +/- 8 1230 JUL
<11 67 +/- 6 2000 AUG
<15 90 +/- 8 1580 SEP
<11 96 +/- 6 1660 OCT
<10 22 +/- 3 3110 NOV
<17 192+/- 13 1860 DEC
<14 78 +/- 9 2170 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.
77 0
20 40 60 80 100 120 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 2022 2024 pCi/Kilogram Cs-137 Broad Leaf Vegetation
78 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, 2024 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 6
<LLD None 0
Cs-137 7
<LLD None 0
CITRUS Spec 1 (pCi/kg)
Cs-134 8
<LLD None 0
Cs-137 9
<LLD None 0
1The "a priori" LLD which meets or exceeds the requirements of Table 2-5 of the CR-3 ODCM.
79 TABLE IV-D.4.a ADP CR3, LLC-2024 pCi/kg OF EMITTERS IN WATERMELON AND CITRUS STATION MONTH Cs-134 Cs-137 K-40 C04 - Watermelon May
<6
<7 1180 C19 - Citrus (Grapefruit)
January
<8
<9 1400