3F0424-03, 2023 Annual Radiological Environmental Operating Report
| ML24121A121 | |
| Person / Time | |
|---|---|
| Site: |  |
| Issue date: | 04/30/2024 |
| From: | Van Sicklen H ADP CR3 |
| To: | Office of Nuclear Reactor Regulation, Document Control Desk |
| References | |
| 3F0424-03 | |
| Download: ML24121A121 (1) | |
Text
Crystal River Nuclear Plant 15760 W . Power Line Street Crystal River, FL 34428 Docket 50-302 Docket 72-1035 ADPCR3 , LLC Operating License No . DPR- 72
April 30, 2024 3F0424-03
U.S . Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001
Subject:
Crystal River Unit 3 - 2023 Annual Radiological Environmental Operating Report
Dear Sir or Madam:
ADP CR3 , LLC hereby provides the 2023 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, 2023 through December 31 , 2023.
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.
Sincerely,
Holly Van Sicklen ISFSI Manager
HVS/clm
- 2023 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
2023 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT
ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT
2023
CRYSTAL RIVER UNIT 3 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 Groun d Water .................................................................................. 25 Statistical Summary ................................................................................ 35
- 4. Site Ground Water Non- REMP .............................................................. 26 Statistical Summary ................................................................................ 54
- 5. Drinking Water ........................................................................................ 26 Statistical Summary ................................................................................ 59
- 6. Shor eline 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
i 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. A s of March 2024, most plant systems have been abandoned or removed.
ii 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 20 23 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 onTable 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 experiencingsimilar 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 20 23 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 relatedradioactive material is occasionally 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.
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 above LLD.
1 TABLE I-1
ADP CR3, LLC- 2023
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 0.3 6 C67 SSE 0.3 3 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
2 TABLE I-1 (CONT'D)
ADP CR3, LLC- 2023
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 2.0 C13-Control WSW 3.4
GROUND WATER C40-Control E 3.7
SITE GROUND WATER CR3-1 E 0.1 CR3-2 E 0.1 CR3-3S and 3D SSE 0.1 CR3-4 SSE 0.1 CR3-5 SSW 0.05 CR3-6S W 0.04 CR3-6D W 0.04 CR3-7 WNW 0.06 CR3-8 WNW 0.07 CR3-9 NW 0.1 CR3-10 NNE 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
3 TABLE I-2
ADP CR3, LLC- 2023
SAMPLING AND ANALYSIS PROGRAM
SAMPLE MEDIA # OF STATIONS FREQUENCY ANALYSIS LLD1
TLD 32* Quarterly Dose ---
Air Particulate 6 Weekly Gross 0.01 pCi/m3 Quarterly Spec -134 b
-137 b
Seaw 3 Monty Trm 2000 a p/L
Monty Spec -
-134
-137 Grat 1 Siannu Trm a p/L Siannu Spec 2 2
Site Ground Wat 3 9 Quartly Trm 2000a pCi/L Quartly Spec : 2 2
Drii 3 Quartly Tritium 2000a pCi/L
Quarterly Spec : 2 2
Shoreline Sediment 4 Semiannual J 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
4 TABLE I-2 (Cont'd)
ADP CR3, LLC- 2023
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 3 Monthly3 Spec Vegetation
-134
-137
Wmon 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
5 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
6 FIGURE I-2: Environmental Monitoring Sample Stations (non- TLDs) Outlying Areas
- ffi)
Yankeetown (18 tnghs (79 @J (03
- Cro ss Florida (19 Greenway
-Inglis
[
- 1 * (74
~
.,_,,/
(29
- C14 G
- * (40 *
- C14M
- CR3 C75
- (13
- 00
Crystal River, including Kings Bay * (76 Outstanding ...
(77 * (10
Fort Island Gulf
- Beach Fishing Pier
(09 Crystal Ri* C0.7 G o g le ,,
7 Figure I-3
Environmental Monitoring Locations Site and Adjacent Areas
8 C74
C14G
FIGURE 1-4: Environmental Monitoring TLD Locations (off site)
9 Figure I-5: CR3 Groundwater Monitoring Well Locations Deep Wells Are Also Installed at #s 1, 3, 6
10 II. LAND-USE CENSUS
A land- use census took place during the months of Junethrough October 2023. 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 2022. There were no active gardens identified within 5 miles of CR3. The one garden area identified in 2022 at ENE at 4.4 miles of CR3 was not present in 2023.
NEAREST NEAREST SECTOR NEAREST RESIDENCE GARDEN (A) 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 * *
- 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.
11 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 2023, 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 202 3:
Media Nuclide Result % Bias Acceptance Range Flag
Air Filter Cs-134 1.549 -3.2 1.12 - 2.08 A Air Filter Cs-137 0.046 - False Positive Test A Air Filter Co-60 0.025 - False Positive Test A
Soil Cs-134 698. 04 0.7 485 - 901 A Soil Cs-137 1757.5 -2.9 1267 - 2353 A Soil Co-60 843 -6.1 629 - 1167 A
Vegetation Cs-134 4.599 -7.7 3.49 - 6.47 A Vegetation Cs-137 -0.014 - False Positive Test A Vegetation Co-60 2.627 -5.8 1.95 - 3.63 A
Water Cs-134 11.074 -2.0 7.9 - 14.7 A Water Cs-137 8.62 -0.9 6.1 - 11.3 A Water Co-60 0.053 - False Positive Test A Water H-3 862.4 1.7 729.6 - 966.7 A
12 IV-A. AIRBORNE PATHWAY
Air samples are taken at five 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. Location C07 in downtown Crystal River was retired mid-year as part of the REMP downsizing consistent with the reduced source term at CR3 due to ongoing decommissioning activities and will not be included in the 2024 REMP report. The pump was damaged during a storm, and it was determined that the costly repairs were not prudent given the short remaining expected runtime.
Tables IV-A.2 and IV-A.3 provide the results for each weekly air sample.
In 2023, 286 particulate samples were analyzed for gross beta activity, and all 286 had measurable activity above LLD. The average indicator concentration for collected samples was 20 pCi/1000 m3 with a range of 10 to 39 pCi/1000 m3. In 2022, the average indicator concentration for collected samples was 18 pCi/1000 m3 with a range of 3 to 39 pCi/1000 m3. The average indicator concentration since 1996 has beenin the range of 14 to 24 pCi/1000 m3. The control location concentration for 2023 averaged 17 pCi/1000 m3, with a range of 8 to 39 pCi/1000 m3. The control location in 2022 averaged 16 pCi/1000 m3. In 2023, location C41 had the highest yearly indicator concentration at 22 pCi/1000 m3. In 2022 , location C18 had the highest yearly indicator concentration at 19pCi/1000 m 3. In summary, the 2023 gross beta air sample results are consistent with past results.
Quarterly composite data are summarized in Table IV- A.3. In 2023 , measurable quantities of Cs -137werenot identified in any particulate filter sample. The highest Cs-137 LLD was 1. 7 pCi/1000 m3, versus 1.0 pCi/1000 m3 in 2022.
The 2023 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 a nnual REMP r eport submitted for Crystal River Unit 3.
There weresix instances of weekly air samples that were not collected in 2023, not counting C07 . They were identified during the routine weekly sample change- outs and documented in Certrec Condition Report 2022000004: REMP Program Tracking for 2023.
- 1. C40: 2- Aug - Pump not working
- 2. C46: 21- Nov, 29- Nov - Power outage
- 3. C18: 24- Oct, 5-Dec, 14- Dec - Power outage
The yearly percentages of missed or partial air samples , not counting C07 (6) was 2.6 % of the total indicator samples (230). This is similar to historical missed sample percentages.
13 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, 20 23
MEDIUM OR ANALYSIS AND NUMBER OF PATHWAY TOTAL NUMBER LOWER LIMIT ALL INDICATOR LOCATIONS LOCATION WITH HIGHEST MEAN CONTROL LOCATION NONROUTINE SAMPLED OF ANALYSES OF DETECTION MEAN NAME MEAN MEAN REPORTED (UNITS) PERFORMED (LLD)1 RANGE DISTANCE & BEARING RANGE RANGE MEASUREMENTS
AIRBORNE Gross 286 6.4 20 (234/234) C41 20 (5 2/ 52) 17 (52 /5 2) 0 PARTICULATES (10- 39) 0.4 miles SW (11- 38) (8- 39)
(pCi/1000m 3 for Spec 23 Gross ,
pCi/1000m3 for Cs-134 0.8 <LLD ---- <LLD 0 Spec)
Cs-137 0.8 <LLD -- -- <LLD 0
1The "a priori" LLD which meets or exceeds the requirements of Table 2-9 of the CR-3 ODCM .
14 TABLE IV-A.2
pCi/1000 m 3 GROSS BETA IN AIR
SAMPLE SITE
Collection Date C07 C18 C40 C41 C46 C47 04-Jan-23 18 15 16 14 19 9 10-Jan-23 26 23 22 20 19 23 17-Jan-23 25 32 27 22 26 17 23-Jan-23 16 18 18 20 21 18 31-Jan-23 19 24 21 24 20 19 07-Feb-23 15 18 14 16 17 11 14-Feb-23 5 14 11 12 14 8 21-Feb-23 19 18 26 21 19 16 27-Feb-23 16 17 17 14 18 16 06-Mar-23 23 16 22 20 15 12 14-Mar-23 19 19 20 20 18 19 21-Mar-23 23 20 21 22 22 24 27-Mar-23
- 23 14 13 11 9
Average: 19 20 19 19 18 16
- No power at site during this period
15 TABLE IV-A.2 (Cont d)
pCi/1000 m 3 GROSS BETA IN AIR
SAMPLE SITE Collection Date C07 C18 C40 C41 C46 C47 03-Apr-23 17 16 18 19 18 20 11-Apr-23 16 16 16 12 13 12 17-Apr-23 12 17 14 16 14 15 25-Apr-23 29 27 25 26 28 23 02-May-23 11 18 15 11 17 14 10-May-23 17 24 13 24 19 18 15-May-23 36 38 31 38 39 39 23-May-23 23 24 20 22 20 20 30-May-23 11 17 12 16 16 14 06-Jun-23 17 16 15 19 14 13 14-Jun-23 20 23 24 17 26 19 21-Jun-23 13 10 14 15 11 14 27-Jun-23 14 20 16 13 19 15
Average 18 20 18 19 20 18
16 TABLE IV-A.2 (Cont'd)
pCi/1000 m 3 GROSS BETA IN AIR
SAMPLE SITE Collection Date C07 C18 C40 C41 C46 C47 06-Jul-23 19 24 20 21 23 19 12-Jul-23 15 19 18 17 15 13 18-Jul-23 20 19 19 18 23 17 26-Jul-23
- 15 14 13 18 14 02-Aug-23
- 21
- 15 19 10 09-Aug-23
- 27 24 27 26 24 14-Aug-23
- 15 18 18 23 14 22-Aug-23
- 15 14 17 16 17 28-Aug-23 27 21 22 29 25 22 06-Sep-23 14 12 14 16 13 13 14-Sep-23 15 15 15 15 17 11 20-Sep-23 31 29 28 15 28 28 25-Sep-22
- 24 20 21 23 19
Average 18 20 17 19 21 17
- Not Collected - pump malfunction or no power
17 TABLE IV-A.2 (Cont'd)
pCi/1000 m 3 GROSS BETA IN AIR
SAMPLE SITE Collection Date C07 C18 C40 C41 C46 C47 04-Oct-23
- 12 13 12 13 8 10-Oct-23
- 19 15 20 13 18 18-Oct-23
- 15 12 13 13 11 24-Oct-23 *
- 27 28 25 21 30-Oct-23
- 18 28 30 29 21 06-Nov-23
- 26 26 27 29 30 16-Nov-23
- 24 26 30 22 19 21-Nov-23
- 17 21 23
- 13 29-Nov-23
- 25 22 23
- 25 05-Dec-23 *
- 20 23 17 22 14-Dec-23 *
- 23 21 22 25 19-Dec-23
- 20 18 13 17 13 28-Dec-23
- 22 26 23 19 16
Average 17 21 22 17 19
- Not collected
18 TABLE IV-A.3
pCi/1000 m 3 GAMMA EMITTERS IN QUARTERLY COMPOSITES OF AIR PARTICULATES
STATION NUCLIDE FIRST QUARTER SECOND QUARTER THIRD QUARTER FOURTH QUARTER
C07 Be -7 152 162 137
- K-40 <15 <14 <16
- Cs -134 <1.1 <1.2 <1.3
- Cs -137 <1.1 <0.8 <1.1
- C18 Be -7 163 149 125 96 K -40 <20 <20 <12 <15 Cs -134 <1.3 <1.2 <0.9 <1.2 Cs -137 <1 <0.8 <0.9 <0.9
C40 Be-7 128 109 146 133 K -40 <19 <22 <10 <14 Cs -134 <1.2 <1.5 <1.1 <1.1 Cs -137 <1 <1.4 <0.8 <1
C41 Be -7 111 169 122 148 K-40 <13 <20 <17 <12 Cs -134 <1.3 <1 <1.4 <1.4 Cs-137 <0.8 <1 <1.1 <0.9
C46 Be -7 148 101 152 130 K -40 <13 <28 <16 <15 Cs -134 <0.9 <2 <0.9 <1.2 Cs -137 <0.8 <1.7 <0.7 <0.7
C47 Be -7 169 108 149 138 K -40 <22 <14 <15 <25 Cs -134 <1 <1.1 <0.8 <1.3 Cs -137 <0.6 <0.9 <0.9 <1
- Not collected
19
`
Airborne (highest values plotted) 2011 Measured Values due to Fukushima Event 0.01
~ ! \\
I _,, \\ /\\ ~-- j / ~ \\ -- --- "' ".--* - 1\\ I\\
Ill I - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -----* ".__. ' ~: - - - - - - - -."a-<--~-
0.001
I
- I
0.0001 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 2022
20 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, 122 were collected. Location C7 3 could not be collected during the first quarter and location C7 1 could not be collected during the second quarter as they were missing.
Table IV-B provides a statistical summary of the analytical results for 122 non- control TLDs collected throughout the year.
Table IV-B.1 provides the results of the individual TLD measurements.
In 2023, the highest annual average on- site dose was at location C70 (WSW at 3850 feet) at 45 mrem . It is partially influenced by naturally occurring radioactive material (NORM) associated residual on- site coal and nearby construction work. In 2022, the highest annual average on- site dose was 50.0 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 are being demolished. The areas around locations C70, C71 and C72 are undergoing construction work associated with the Unit 1 & 2 coal plant demolition and other Duke Energy site improvement initiatives.
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 4 0.2mrem, also at station C 40. 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.
21 TABLE IV-B
RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM
SUMMARY
CRYSTAL RIVER UNIT 3 DOCKET NO. 50-302
CITRUS COUNTY, FLORIDA JANUARY 1 TO DECEMBER 31, 2023
MEDIUM OR ANALYSIS AND NUMBER OF PATHWAY TOTAL NUMBER LOWER LIMIT ALL INDICATOR LOCATION WITH HIGHEST MEAN CONTROL NONROUTINE SAMPLED OF ANALYSES OF DETECTION LOCATIONS MEAN NAME MEAN LOCATION REPORTED (UNITS) PERFORMED (LLD) RANGE DISTANCE & BEARING RANGE MEAN MEASUREMENTS RANGE
DIRECT SE , 126 ( 22 2) 0 (4/ 35 ( 0 RADIATION (25 - ) W (35 - ) (32 )
(mrem/yr)
22 TABLE IV-B.1
ADP CR3, LLC- 2023
Annual Gamma () Do(mrem)
TLD STATION Quarter 1 2 3 4
C 0 1 27 32 26 25 C 03 29 34 30 30 C 04 28 35 28 28 C 07 28 34 27 27 C 08 28 32 27 27 C09 30 32 27 27 C14G 30 34 29 29 C18 30 36 37 37 C27 39 46 33 33 C40 39** 40 35 35 C41 35 41 33 33 C46 34 41 30 30 C47 (CONTROL) 32 37 34 35 C60 33 41 36 36 C61 36 43 26 39 C62 41 48 30 35 C63 39 44 39 34 C64 32 41 35 40 C65 39 49 34 37 C66 38 43 40 37 C67 38 46 37 34 C68 37 42 37 38 C69 38 44 34 46 C70 47 58 38 35 C71 54
- 46 32 C72 36 41 35 28 C73
- 39 32 33 C74 27 32 28 31 C75 32 40 33 26 C76 31 36 31 31 C77 25 29 26 34 C79 32 36 31 40
- Missing
- Estimated value.
23 Direct Radiation 100
See CR 684849
10 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 2022
TLD Average of All Stations
24 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 2023 , of twenty-four indicator samples, none had measurable tritiumabove LLD values.
Gamma spectral analysis was performed on all thirty-six samples, (including the 12 control samples at C13) and none of themshowed 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 acontrol reference background and is upstream of the groundwater flow gradient from CR3. Gamma spectral and tritium analyses are performed. In 2023 , 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 140 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 (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 contributor 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 know n leaking plant components.
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 183pCi/L in 2021 based on all four quarterly samples. It showed an average of 227 pCi/l in 2020. No other ground water wells showed greater than LLD tritium in 2023.
Along with these wells, two other wells that are not presently part of the REMP program weresampled. 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 wells did not show tritium concentrations or gamma emitters above LLD levels in 2023, same as in 2022 . In 2023, the percolation ponds were retired and backfilled.
Due to ongoing site demolition work, two well samples could not be obtained in 2023 . This is documented in Condition Report (CR) 2022000004. The well samples were CR3-2 and CR3- 6D, both in the second quarter.
25 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.
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 2023 , none of the samples yielded measurable activities of tritium or the required gamma emitters, same as in 2022. 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.
26 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 2023, all seven collected samples showed Cs-134 less than LLD. Two indicator locations (C-14H and C-14G) had Cs-137 slightly aboveLLD values for two of the three collected samples with C-14M having both collected samples less than LLD for Cs-137. Four of the five indicator location samples collected showed Co- 60 above MDA ranging from 27to 590 pCi/kg. Location C14H at the head of the canal and closest to the discharge point had Co- 60 values of 346 and 590 pCi/g for the first and second semester samples, respectively. It is not unexpected to see licensed material in the discharge canal as CR3 still makes permitted liquid releases to the canal. In 2022, five of the six samples showed Cs-137 below LLD. The reported positive sample was at C14G at a Cs -137 concentration of 35 pCi/kg. One of the two C -14H Co-60 values was above MDA at 143 pCi/kg with the other discharge canal 2022 Co- 60 results less than LLD.
The 2023 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 202 3 that hadthe 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.
27 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, 2023
MEDIUM OR ANALYSIS AND NUMBER OF PATHWAY TOTAL NUMBER OF LOWER LIMIT ALL INDICATOR LOCATIONS LOCATION WITH HIGHEST MEAN CONTROL LOCATION NONROUTINE SAMPLED ANALYSES OF DETECTION MEAN NAME MEAN MEAN REPORTED (UNITS) PERFORMED (LLD)1 RANGE DISTANCE & BEARING RANGE RANGE MEASUREMENTS SEAWATER Tritium, 36 172 <LLD -- -- <LLD 0 (pCi/L)
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- 9 of the CR-3 ODCM.
2 Only one sample showed greater than LLD tritium - April 6th sample at location C14H
28 TABLE IV-C.1.a ADP CR3, LLC- 2023 pCi/L GAMMA EMITTERS AND TRITIUM IN SEAWATER
STATION MONTH H-3 K-40 Co-60 Cs-134 Cs-137
C13 JAN <142 216+/-21 <3 <3 <3 FEB <138 214+/-21 <4 <3 <4 MAR <141 229+/-22 <5 <6 <6 APR <151 232+/-23 <4 <3 <3 MAY <136 246+/-24 <4 <4 <4 JUN <150 293+/-29 <4 <4 <5 JUL <127 131+/-13 <5 <4 <6 AUG <127 232+/-23 <3 <3 <4 SEP <141 211+/-21 <4 <4 <4 OCT <138 320+/-32 <6 <5 <6 NOV <138 261+/-26 <4 <4 <4 DEC <138 241+/-24 <4 <4 <4
C14G JAN <134 205+/-20 <5 <4 <5
FEB <142 251+/-25 <4 <3 <4
MAR <138 284+/-28 <4 <4 <4
APR <141 233+/-23 <3 <3 <3
MAY <151 258+/-25 <6 <6 <6
JUN <136 266+/-26 <4 <4 <4
JUL <150 351+/-35 <4 <4 <5
AUG <127 214+/-21 <6 <5 <7
SEP <141 301+/-30 <4 <5 <5
OCT <138 291+/-29 <4 <4 <4
NOV <138 360+/-36 <3 <4 <4
DEC <137 296+/-29 <5 <5 <6
29 TABLE IV -C.1a (CONT'D)
ADP CR3, LLC- 2023
pCi/L GAMMA EMITTERS AND TRITIUM IN SEAWATER
STATION MONTH H-3 K-40 Co-60 Cs-134 Cs-137
C14H JAN <134 229+/-22 <6 <5 <6
FEB <142 305+/-30 <5 <5 <5
MAR <138 243+/-24 <4 <3 <4
APR <141 197+/-19 <4 <5 <5
MAY <151 221+/-22 <3 <4 <4
JUN <136 201+/-20 <4 <4 <4
JUL <150 287+/-28 <6 <5 <6
AUG <141 197+/-19 <5 <4 <5
SEP <138 184+/-18 <4 <4 <4
OCT <138 249+/-24 <4 <3 <4
NOV <137 322+/-32 <4 <4 <5
DEC <134 176+/-17 <5 <5 <6
30 Seawater
10000
A & I I measured
\\ /\\ I I values
\\ I\\ . I I
\\ I \\ ~ ~ --- I \\
1000 \\ A ~ I \\ I \\ I \\
I - .
\\ ,I \\ I \\ I \\ I \\ \\
I ,.. I I I I \\ I \\ I\\ \\ ""
\\ I \\ & I \\ I ~ I I I \\ \\
V \\ /\\ I \\ I ~ I \\ I \\ ~
- ~ I \\ I \\ j \\ I \\ I \\ /\\
~ "l .. - .!;- . - - -./ ~
100 \\1 ~
-=:. t\\ -
measured I l"/1:,
j values I II \\, \\' .\\
10 I \\ -
I \\l,. . _.-?' -- ~ -- . . . ..-%. ..z.. -<~ ~-- - - - - - -- -. - , -
- ., - ---- -r 'P - ~ -
- ..I. = - - - - /-- " " */ - ... ................ - ___.. T '-... / "*-..... -=- - - ~ / ,, T T T ."'- / -:- "":/ -_//
T r - - ------- - - - -
T T
- II -
~-' :!/
1 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 2022
31 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, 2023
MEDIUM OR ANALYSIS AND NUMBER OF PATHWAY TOTAL NUMBER OF LOWER LIMIT ALL INDICATOR LOCATIONS LOCATION WITH HIGHEST MEAN CONTROL LOCATION NONROUTINE SAMPLED ANALYSES OF DETECTION MEAN NAME MEAN MEAN REPORTED (UNITS) PERFORMED (LLD)1 RANGE DISTANCE & BEARING RANGE RANGE 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
1 The "a priori" LLD which meets or exceeds the requirements of Table 2-9 of the CR -3 ODCM.
2 There is no drinking water uptake pathway at the Crystal River site. This location is used as the groundwater background.
32 TABLE IV-C.2.a
ADP CR3, LLC- 2023
pCi/L GAMMA EMITTERS AND TRITIUM IN GROUND WATER
STATION NUCLIDE FIRST HALF SECOND HALF
C40 H-3 <1 39 <1 37 Co -60 <4 <4 Cs -134 <4 <4 Cs -137 <4 <5 K-40 < 39 < 55
33 Semi-Annual Ground Water
1000
- - - -. . ~ .. .. .. ~ . . ..
~ - - . - --- -. . --- ---- - - - -- - - - --
100
10
- ,.. - - -~ " -
,.....__ - - I \\ I \\ ~
- - - I -~ _/ "-- -- - r ""\\ - I \\ I \\ \\ _/ \\ - --
- _/ - - - -~ - _/ "--- - -- - - \\ ---_ /\\ _j ~ ';_,/' \\_ _/ - - -
~ ~ \\. _/,,-- - -
1 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 2022
34 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, 2023
MEDIUM OR ANALYSIS AND NUMBER OF PATHWAY TOTAL (NUMBER) LOWER LIMIT ALL INDICATOR LOCATIONS LOCATION WITH HIGHEST MEAN CONTROL LOCATION NONROUTINE SAMPLED (UNITS) OF ANALYSES OF DETECTION MEAN NAME MEAN MEAN REPORTED PERFORMED (LLD)1,2 RANGE DISTANCE & BEARING RANGE RANGE MEASUREMENTS
CR3 SITE Tritium 46 172 <LLD <LLD <LLD 0 GROUND WATER -
(pCi/L) -
Spec 46
- 42 <LLD -- -- - 0
-134 42 <LLD -- -- - 0
-137 42 <LLD -- -- - 0
1 The "a priori" LLD which meets or exceeds the requirements of Table 2-9 of the CR -3 ODCM.
2 One sample had these higher LLD values (due to high K -40).
35 TABLE IV-C.3.a.1
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 01-27 <137 <55 <4 <4 <5
04-12 <137 <44 <4 <3 <4
07-27 <140 <50 <4 <4 <4
10- 16 <139 <53 <4 <4 <4
CR3-1S 01- 27 <137 <66 <5 <5 <5
04- 12 <148 <45 <4 <4 <4
07- 27 <140 <67 <4 <5 <6
10- 16 <138 <42 <4 <4 <4
CR3-2 01- 31 <137 <46 <4 <4 <5
07- 27 <140 <70 <6 <5 <6
10- 16 <138 <72 <6 <6 <5
36 TABLE IV-C.3.a.1
ADP CR3, LLC- 2023
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- 31 <137 <93 <6 <5 <5
04- 12 <137 <60 <5 <5 <6
07- 27 <141 <89 <7 <6 <7
10- 16 <138 <53 <5 <5 <5
CR3-3S 01- 31 <137 <67 <5 <5 <5
04- 12 <148 <43 <4 <4 <4
07- 27 <142 <174 <15 <12 <15
10- 16 <138 <70 <5 <6 <6
CR3-4 01-27 <138 <59 <4 <4 <5
04- 12 <137 <68 <5 <6 <6
07- 27 <140 <64 <5 <5 <5
10- 16 <138 <60 <4 <5 <5
37 TABLE IV-C.3.a.1
ADP CR3, LLC- 2023
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 01-27 <138 <66 <4 <4 <5
04- 12 <137 <50 <4 <4 <4
07- 27 <141 <61 <5 <5 <5
10- 16 <138 <53 <4 <5 <5
CR3-6S 01- 27 <137 <45 <4 <4 <4
04- 12 <137 <37 <4 <3 <4
07- 27 <140 <35 <4 <4 <4
10- 16 <138 <65 <6 <6 <6
CR3-6D 01- 27 <138 <73 <6 <6 <6
07- 27 <140 <82 <6 <6 <6
10- 16 <138 <75 <6 <6 <6
38 TABLE IV-C.3.a.1(contd)
ADP CR3, LLC- 2023
pCi/L GAMMA EMITTERS AND TRITIUM IN CR3 SITE GROUND WATER
STATION DATE H-3 K-40 Co-60 Cs-134 Cs-137
C R3 -7 01- 27 <138 <45 <4 <4 <4
04- 12 <137 <50 <4 <4 <4
07- 27 <140 <56 <4 <5 <5
10- 16 <138 <52 <5 <5 <5
CR3-8 01- 27 <138 <65 <7 <6 <7
04- 12 <137 <53 <4 <4 <4
07- 27 <140 <59 <5 <4 <4
10- 16 <138 <68 <6 <6 <7
CR3-9 01- 27 <137 <53 <4 <5 <4
04- 12 <137 <53 <4 <4 <5
07- 27 <140 <63 <4 <5 <5
10- 16 <138 <52 <5 <5 <5
39 TABLE IV-C.3.a.1(contd)
ADP CR3, LLC- 2023
pCi/L GAMMA EMITTERS AND TRITIUM IN CR3 SITE GROUND WATER
STATION DATE H-3 K-40 Co-60 Cs-134 Cs-137
C R3 -10 01- 27 <137 <68 <6 <6 <5
04- 12 <137 <75 <7 <4 <6
07- 27 <140 <70 <6 <6 <6
10- 16 <139 <87 <4 <5 <6
40 Tritium Measurement GW Well # CR3- 1S
All results are < LLD since 2010
200
180
160
140
120
100
80 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
41 Tritium Measurement GW Well # CR3- 1D
All results are < LLD
200
180
160
140
120
100
80 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
42 Tritium Measurement GW Well # CR3-2
All results are < LLD (Missing some data from 2022 and 2023 due to inaccessibility)
200
180
160
140
120
100
80 07/06/09 04/01/12 12/27/14 09/22/17 06/18/20 03/15/23
43 Tritium Measurement GW Well # CR3- 3S
All results are < LLD unless noted
200
180
160
140
120
100
80 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
44 Tritium Measurement GW Well # CR3- 3D
All results are < LLD
200
180
160
140
120
100
80 05/21/12 10/03/13 02/15/15 06/29/16 11/11/17 03/26/19 08/07/20 12/20/21 05/04/23 09/15/24
45 Tritium Measurement GW Well # CR3-4
All results are < LLD since 2013 200
180
160
140
120
100
80
60 10/10/06 07/06/09 04/01/12 12/27/14 09/22/17 06/18/20 03/15/23 12/09/25
46 Tritium Measurement GW Well # CR3-5 Results after first quarter 2022 are all less than LLD Missing two 2022 results due to well inaccessibility 2000
1800
1600
1400
1200
1000
800
600
400
200
0 10/10/06 07/06/09 04/01/12 12/27/14 09/22/17 06/18/20 03/15/23 12/09/25
47 Tritium Measurement GW Well # CR3- 6S Results after 2014 are < LLD
200
180
160
140
120
100
80
60 10/10/06 07/06/09 04/01/12 12/27/14 09/22/17 06/18/20 03/15/23 12/09/25
48 Tritium Measurements GW Well # CR3- 6D
All results are < LLD after 2010
250
230
210
190
170
150 130
110
90
70
50 10/10/06 07/06/09 04/01/12 12/27/14 09/22/17 06/18/20 03/15/23 12/09/25
49 Tritium Measurements GW Well # CR3-7 All measurements LLD after 2015
800
700
600
500
400
300
200
100
0 10/10/06 07/06/09 04/01/12 12/27/14 09/22/17 06/18/20 03/15/23 12/09/25
50 Tritium Measurements GW Well # CR3-8 All measurments LLD after 2016
250
230
210
190
170
150
130
110
90
70
50 10/10/06 07/06/09 04/01/12 12/27/14 09/22/17 06/18/20 03/15/23 12/09/25
51 Tritium Measurements GW Well # CR3-9 All measurements <LLD after 2013
180
160
140
120
100
80
60 10/10/06 07/06/09 04/01/12 12/27/14 09/22/17 06/18/20 03/15/23 12/09/25
52 Tritium Measurements GW Well # CR3- 10 All measurements LLD after 2012
200
180
160
140
120
100
80
60 10/10/06 07/06/09 04/01/12 12/27/14 09/22/17 06/18/20 03/15/23 12/09/25
53 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, 2023
MEDIUM OR ANALYSIS AND NUMBER OF PATHWAY TOTAL NUMBER OF LOWER LIMIT ALL INDICATOR LOCATIONS LOCATION WITH HIGHEST MEAN CONTROL NONROUTINE SAMPLED ANALYSES OF DETECTION MEAN NAME MEAN LOCATION REPORTED (UNITS) PERFORMED (LLD)1 RANGE DISTANCE & BEARING RANGE MEAN MEASUREMENTS RANGE
(pCi/L) Spec 8
- 4 <LLD - - - 0
-134 4 <LLD - - - 0
-137 4 <LLD - - 0
T*a priori" LLDcmts or ceedsequiremes ofable 2-9 ofR -3M.
- Non-REMP required samples
- REMP location C-40 is the site background. All C -40 results are <LLD
54 TABLE IV-C.4.a
ADP CR3, LLC- 2023
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 <137 <37 <4 <5 <5 27* 01
04-12 <137 <57 <6 <5 <6
07- 27 <140 <70 <7 <6 <6
10- 16 <138 <62 <4 <5 <5
- These wells are not officially included in the REMP and are located on either side (north and south) of the site percolation ponds.
55 TABLE IV-C.4.a(contd)
ADP CR3, LLC- 2023
pCi/L EMITTE AND TTIN CR3ITEUND WER (SUPPLEME
STATION DATE H-3 K-40 Co-60 Cs-134 Cs-137
MWC-IF2* 01- 27 <138 <76 <6 <6 <7
04- 12 <137 <55 <5 <4 <4
07- 27 <140 <92 <6 <6 <7
10- 16 <135 <48 <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.
56 Tritium Measurements GW Well # MWC -27 All measurements LLD after 2010
1400
1200
1000
800
600
- f 400
...\\
200 t I *
- y*L_ *- - --.. ..... ........ -A -A A-* --..... - - A - - A~
~i - ..., -l* T ..... T ..,..., T T -TT~ - -- ~ .................... -T
0 10/10/06 07/06/09 04/01/12 12/27/14 09/22/17 06/18/20 03/15/23 12/09/25
57 Tritium Measurements GW Well # MWC -IF2 All measurements LLD after 2012
600
500
400
300
200
100
0 10/10/06 07/06/09 04/01/12 12/27/14 09/22/17 06/18/20 03/15/23 12/09/25
58 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, 2023
MEDIUM OR ANALYSIS AND NUMBER OF PATHWAY TOTAL NUMBER OF LOWER LIMIT ALL INDICATOR LOCATIONS LOCATION WITH HIGHEST MEAN CONTROL LOCATION NONROUTINE SAMPLED ANALYSES OF DETECTION MEAN NAME MEAN MEAN REPORTED (UNITS) PERFORMED (LLD)1 RANGE DISTANCE & BEARING RANGE RANGE MEASUREMENTS
DRINKING Tritium 12 172 - - <LLD 0 WATER (pCi/L) Sp 12
- 4 - - <LLD 0 Cs-134 4 - - <LLD 0 Cs-137 4 - - <LLD 0
1The "a priori" LLD which meets or exceeds the requirements of Table 2-9 of the CR-3 ODCM.
59 TABLE IV-C.5.a
ADP CR3, LLC- 2023
pCi/L GAMMA EMITTERS AND TRITIUM IN DRINKING WATER
STATION DATE H-3 K-40 Co-60 Cs-134 Cs-137
C07 01- 04 <142 <63 <4 <5 <6
04-12 <137 <76 <4 <5 <6
07-18 <127 <35 <4 <4 <4
09- 25 <137 <45 <4 <4 <4
C10 01-04 <142 <65 <4 <3 <4
04-12 <137 <67 <5 <5 <4
07- 18 <127 <37 <4 <5 <4
09- 25 <137 <65 <5 <6 <6
C18 01-04 <142 <60 <4 <3 <4
04-12 <137 <67 <5 <5 <6
07- 18 <127 <63 <7 <5 <5
09- 25 <137 <44 <4 <4 <4
60 Quarterly Drinking Water All values are LLD
1000
~ ~
\\ \\
\\ . . . __._ . . .
~ - - - - . . - - - - - - - - - - -. . - - - . . . - - - - - -
100 - - - - -
10
~~~*- --- - - - -- - - -- / -/ - ---
- --.....__ r - - "'\\ r '-- _,., ~ __, - ........ -
- - - - - - - - - ----- - - "'-..._ / -_ / - \\... / -
i - - - - - - - - \\ I - - -' _
.. ......._. ! -I -V I
I
\\ I 1 \\ I
\\
.... .I.
0.1 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 2022
61 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, 2023
MEDIUM OR ANALYSIS AND NUMBER OF PATHWAY TOTAL NUMBER OF LOWER LIMIT ALL INDICATOR LOCATION WITH HIGHEST MEAN CONTROL LOCATION NONROUTINE SAMPLED ANALYSES OF DETECTION LOCATIONS MEAN NAME MEAN MEAN REPORTED (UNITS) PERFORMED (LLD)1 RANGE DISTANCE & BEARING RANGE RANGE MEASUREMENTS
SHORELINE Spec 7 SEDIMT (i/k -134 7 < LLD <LLD 0
-137 7 2 / C14H NW mile 26 ( <LLD 0
(-26)
- 7 249 (4/5) 4 NW.1 me 4 7- -590) <LLD 0 (6
1The "a priori" LLD which meets or exceeds the requirements of Table 2- 9 of the CR-3 ODCM.
62 TABLE IV-C.6.a
ADP CR3, LLC- 2023
pCi/kg GAMMA EMITTERS IN SHORELINE SEDIMENT
STATION PERIOD Co-60 Cs-134 Cs-137 K-40
C09 First Half <9 <9 <9 315+/- 45
Second Half <8 <9 <11 406+/- 49
C14H First Half 346+/-9 <18 <13 586+/- 57
Second Half 590+/-13 <18 26+/-4 618+/- 59
C14M First Half <22 <17 <13 875+/- 88
Second Half 27+/-3 <11 <9 427+/- 56
C14G First Half 32+/-4 <13 25+/-6 1880+/- 131
Second Half * * * *
- Sample not obtained due to construction
63 Shoreline Sediment
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64 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 2023 , none of the required radionuclides were found in measurable quantities. The highest Cs-137 LLD for stations C29 and C30 was 29.9 pCi/kg. Naturally occurring K- 40 was quantified in all eight samples at an average concentrationof 2,819 pCi/kg.
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.
In 2016 , 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 2023, none of the required radionuclides were found in measurable quantities. The highest Cs-137 LLD was 27.4 pCi/kg . K-40 was quantified in all 8 samples with an average concentration of 1012 pCi/kg.
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 C 29 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.
In 2016, none of the required radionuclides were found in measurable quantities.
In 2015, 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.
65
- 3. Monthly broad leaf vegetation samples were taken at two indicator locations, C48A and C48B, and one control location, C47.
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 345pCi/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 12to 212pCi/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. Theresults 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 10to 116pCi/kg. The control station (C47) located in Orlando, Fl. also had measurable amounts of Cs-137 in 10 of 12 samples ranging from 16to 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 184pCi/kg. These results are similar to those in 201 7.
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.
In 2015, 14 of 24 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 Cs -137. In 11 of 12 control station samples there were measurable amounts of Cs -137 with an average concentration of 67 pCi/kg and a range of 15 to 150 pCi/kg. The Cs-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.
Table IV-D.3 provides a statistical summary of the vegetation gamma spectroscopy results.
66
- 4. 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.
In 2017 the State was unable to locate a watermelon field at location C04 or anywhere in the vicinity of C04. This is documented in plant condition report 2192486. Also, only one citrus sample was collectedversus the usual two samples. It showed above MDA levels of Cs -137 at 9 pCi/kg with an uncertainty of 2 pCi/kg . It was collected at location C19 which is 9.6 miles ENE of CR3. This reported value is less than the MDA of 11 pCi/kg reported in 2016 and is likely due to natural background.
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.
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.
67 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, 20 23 MEDIUM OR ANALYSIS AND NUMBER OF PATHWAY TOTAL NUMBER LOWER LIMIT ALL INDICATOR LOCATIONS LOCATION WITH HIGHEST MEAN CONTROL LOCATION NONROUTINE SAMPLED (UNITS) OF ANALYSES OF DETECTION MEAN NAME MEAN MEAN REPORTED PERFORMED (LLD)1 RANGE DISTANCE & BEARING RANGE RANGE MEASUREMENTS
CARNIVOROUS FISH (pCi/g) Spec 8
- <LLD _ _ <LLD 0
- <LLD _ _ <LLD 0
Cs-137 18 <LLD _ _ <LLD 0
1 The "a priori" LLD which meets or exceeds the requirements of Table 2- 9 of the CR -3 ODCM.
68 TABLE IV-D.1.a
ADP CR3, LLC- 2023
pCi/kg GAMMA EMITTERS IN CARNIVOROUS FISH
STATION QUARTER Co-60 Cs-134 Cs-137 K-40
C29 1 <18.1 <18.7 <18.2 2800+/-198
2 <19.0 <18.4 <16.5 2660+/-164
3 <23.3 <16.6 <19.6 2700+/-192
4 <22.3 <17.9 <19.0 2330+/-151
C30 1 <37.8 <29.9 <30.8 4260+/-307
2 <18.2 <16.9 <18.8 2820+/-177
3 <13.9 <16.6 <16.3 2200+/-141
4 <25.5 <13.2 <20.1 2780+/-196
69 Carnivorous Fish
100
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1 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 2022 Cs-134 LLD Cs-137 LLD
70 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, 2023
MEDIUM OR ANALYSIS AND NUMBER OF PATHWAY TOTAL NUMBER OF LOWER LIMIT ALL INDICATOR LOCATIONS LOCATION WITH HIGHEST MEAN CONTROL LOCATION NONROUTINE SAMPLED ANALYSES OF DETECTION MEAN NAME MEAN MEAN REPORTED (UNITS) PERFORMED (LLD)1 RANGE DISTANCE & BEARING RANGE RANGE MEASUREMENTS
OYSTERS Spec 8 (pCi/kg)
Co-60 16 <LLD - - <LLD 0 Cs-134 16 <LLD - - <LLD 0 Cs-137 18 <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.2.a
ADP CR3, LLC- 2023
pCi/kg GAMMA EMITTERS IN OYSTERS
STATION QUARTER Co-60 Cs-134 Cs-137 K-40
C29 1 <22 <16 <19 940+/-123
2 <31 <20 <21 1180+/-147
3 <40 <18 <27 1010+/-137
4 <22 <17 <18 752+/-108
C30 1 <25 <23 <22 1800+/-164
2 <19 <19 <23 798+/-95
3 <25 <27 <27 849+/-150
4 <19 <19 <23 764+/-113
72 pCi/Kilogram 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, 20 23
MEDIUM OR ANALYSIS AND NUMBER OF PATHWAY TOTAL NUMBER LOWER LIMIT ALL INDICATOR LOCATIONS LOCATION WITH HIGHEST MEAN CONTROL LOCATION NONROUTINE SAMPLED (UNITS) OF ANALYSES OF DETECTION MEAN NAME MEAN MEAN REPORTED PERFORMED (LLD)1 RANGE DISTANCE & BEARING RANGE RANGE MEASUREMENTS
BROAD LEAF VEGETATION Spec 36
(pCi/kg)
Cs-134 8 <LLD _ _ <LLD 0
Cs-137 8 102 (11/24) C48B 89(10/12) 26 (7/12) 0 (48- 252) 0.9 @ 73º (48-252) (9-127 )
1 The "a priori" LLD which meets or exceeds the requirements of Table 2- 9 of the CR -3 ODCM.
74 TABLE IV-D.3.a
ADP CR3, LLC- 2023
pCi/kg OF GAMMA EMITTERS IN BROAD LEAF VEGETATION
STATION MONTH Cs-134 Cs-137 K-40
C47 JAN <11 20+/-4 2980+/-146 FEB <16 127+/-11 2720+/-173 MAR <14 48+/-8 3090+/-184 APR <12 <13 3530+/-176 MAY <32 <41 4760+/-345 JUN <11 9+/-3 3960+/-171 JUL <14 <22 4410+/-225 AUG <11 34+/-4 5310+/-216 SEP <9 14+/-3 3440+/-148 OCT <20 63+/-7 3180+/-192 NOV <15 <17 2200+/-143 DEC <15 <17 4170+/-203
C48A JAN <23 <26 7980+/-382 FEB <15 <1 8 5090+/-252 MAR <16 <19 6780+/-303 APR <12 <1 4 2990+/-159 MAY <15 58+/-6 4110+/-205 JUN <18 <23 3460+/-212 JUL <12 < 15 5010+/-221 AUG <16 <19 6800+/-307 SEP <17 <1 7 7490+/-327 OCT <16 <16 3730+/-197 NOV <14 <21 2340+/-163 DEC <15 <1 7 3360+/-196
75 TABLE IV-D.3.a (CONT'D)
ADP CR3, LLC- 2023
pCi/kg OF GAMMA EMITTERS IN BROAD LEAF VEGETATION
STATION MONTH Cs-134 Cs-137 K-40
C48B JAN <14 66+/-7 1380+/-109 FEB <12 98+/-8 1420+/-119 MAR <16 80+/-8 4670+/-230 APR <13 244+/-12 2580+/-143 MAY <12 78+/-6 2000+/-125 JUN <15 252+/-12 2700+/-154 JUL <15 <19 7910+/-329 AUG <13 48+/-6 2320+/-142 SEP <17 62+/-8 1900+/-163 OCT <23 <34 1880+/-192 NOV <14 88+/-7 1300+/-107 DEC <13 47+/-5 1160+/-90.5
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.
76 Broad Leaf Vegetation Cs-137
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77 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, 2023
MEDIUM OR ANALYSIS AND NUMBER OF PATHWAY TOTAL NUMBER LOWER LIMIT ALL INDICATOR LOCATIONS LOCATION WITH HIGHEST MEAN CONTROL LOCATION NONROUTINE SAMPLED (UNITS) OF ANALYSES OF DETECTION MEAN NAME MEAN MEAN REPORTED PERFORMED (LLD)1 RANGE DISTANCE & BEARING RANGE RANGE MEASUREMENTS
WATERMELON (pCi/g) Spec 1 Cs-134 8 <LLD _ _ <LLD 0
Cs-137 8 <LLD _ _ <LLD 0
CITRUS (pCi/g) Spec 1
-134 8 <LLD _ _ <LLD 0
-137 8 <LLD _ <LLD 0
78 TABLE IV-D.4.a
ADP CR3, LLC- 2023
pCi/kg OF EMITTENEELOTRUS
STATION MONTH Cs-134 Cs-137 K-40
C04 - Watermelon June < 6 < 7 1170+/- 68
C19 - Citrus (Grapefruit) January <8 <10 1400+/- 94
79