SVPLTR 25-0033, Annual Radiological Groundwater Protection Program Report
| ML25135A068 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 05/14/2025 |
| From: | Constellation Energy Generation |
| To: | Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML25135A065 | List: |
| References | |
| SVPLTR 25-0033 | |
| Download: ML25135A068 (1) | |
Text
Annual Radiological Groundwater Protection Program Report YEAR: 2024 Page 0 of 18 Company: Constellation Plant: Dresden Clean Energy Center 2024 Docket Number: 50-010, 50-237, 50-249 Annual Radiological Groundwater Protection Program Report
Annual Radiological Groundwater Protection Program Report YEAR: 2024 Page 1 of 18 Company: Constellation Plant: Dresden Clean Energy Center TABLE OF CONTENTS LIST OF ACRONYMS AND DEFINITIONS................................................................................ 2 NEI 07-07 ONSITE RADIOLOGICAL GROUNDWATER MONITORING PROGRAM................. 4 2.1 Voluntary Notification.................................................................................................... 17 BIBLIOGRAPHY...................................................................................................................... 18 TABLES Table 1, Groundwater Protection Program Monitoring Well Sampling Locations.................................... 5 Table 2, Groundwater Protection Monitoring Well Tritium and Strontium in Ground Water Samples (pCi/L +/- 2 sigma)................................................................................................................................... 9 Table 3, Groundwater Protection Program Monitoring Well Gamma Isotopic in Groundwater Samples (pCi/L +/- 2 sigma)................................................................................................................................. 14 Table 4, Groundwater Protection Program Monitoring Well Hard-To-Detects in Groundwater Samples (pCi/L +/- 2 sigma)................................................................................................................................. 15 Table 5, Groundwater Protection Monitoring Well Tritium in Precipitation Water Samples................... 16 1.0 2.0 3.0
Annual Radiological Groundwater Protection Program Report YEAR: 2024 Page 2 of 18 Company: Constellation Plant: Dresden Clean Energy Center LIST OF ACRONYMS AND DEFINITIONS
- 1.
Composite Sample: A series of single collected portions (aliquots) analyzed as one sample. The aliquots making up the sample are collected at time intervals that are very short compared to the composite period.
- 2.
Control: A sampling station in a location not likely to be affected by plant effluents due to its distance and/or direction from the Plant.
- 3.
Counting Error: An estimate of the two-sigma uncertainty associated with the sample results based on total counts accumulated.
- 4.
Curie (Ci): A measure of radioactivity; equal to 3.7 x 1010 disintegrations per second, or 2.22 x 1012 disintegrations per minute.
- 5.
Grab Sample: A single discrete sample drawn at one point in time.
- 6.
Indicator: A sampling location that is potentially affected by plant effluents due to its proximity and/or direction from the plant.
- 7.
Ingestion Pathway: The ingestion pathway includes milk, fish, drinking water and garden produce. Also sampled (under special circumstances) are other media such as vegetation or animal products when additional information about particular radionuclides is needed.
- 8.
LLD: Lower Limit of Detection. An a priori measure of the detection capability of a radiochemistry measurement based on instrument setup, calibration, background, decay time, and sample volume. An LLD is expressed as an activity concentration. The MDA is used for reporting results. LLD are specified by a regulator, such as the NRC and are typically listed in the ODCM.
- 9.
MDA: Minimum Detectable Activity. For radiochemistry instruments, the MDA is the a posteriori minimum concentration that a counting system detects. The smallest concentration or activity of radioactive material in a sample that will yield a net count above instrument background and that is detected with 95%
probability, with only 5% probability of falsely concluding that a blank observation represents a true signal.
- 10.
MDC: Minimum Detectable Concentration. Essentially synonymous with MDA for the purposes of radiological monitoring.
- 11.
Mean: The sum of all of the values in a distribution divided by the number of values in the distribution, synonymous with average.
- 12.
Microcurie (µCi): 3.7 x 104 disintegrations per second, or 2.22 x106 disintegrations per minute.
- 13.
millirem (mrem): 1/1000 rem; a unit of radiation dose equivalent in tissue.
- 14.
Milliroentgen (mR): 1/1000 Roentgen; a unit of exposure to X-or gamma radiation.
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Annual Radiological Groundwater Protection Program Report YEAR: 2024 Page 3 of 18 Company: Constellation Plant: Dresden Clean Energy Center
- 15.
N/A: Not Applicable
- 16.
NEI: Nuclear Energy Institute
- 17.
NRC: Nuclear Regulatory Commission
- 18.
ODCM: Offsite Dose Calculation Manual
- 19.
Protected Area: A 10 CFR 73 security term is an area encompassed by physical barriers and to which access is controlled for security purposes. The fenced area immediately surrounding the plant and around ISFSI are commonly classified by the licensee as Protected areas. Access to the protected area requires a security badge or escort.
- 20.
REMP: Radiological Environmental Monitoring Program
- 21.
Restricted Area: A 10 CFRR 20 defined term where access to which is limited by the licensee for the purpose of protecting individuals against undue risks from exposure to radiation and radioactive materials.
- 22.
TRM: Technical Requirements Manual
- 23.
TS: Technical Specification
- 24.
Unrestricted Area: An area, access to which is neither limited nor controlled by the licensee.
Annual Radiological Groundwater Protection Program Report YEAR: 2024 Page 4 of 18 Company: Constellation Plant: Dresden Clean Energy Center NEI 07-07 ONSITE RADIOLOGICAL GROUNDWATER MONITORING PROGRAM Dresden Clean Energy Center has developed a Groundwater Protection Initiative (GPI) program in accordance with NEI 07-07, Industry Ground Water Protection Initiative - Final Guidance Document [1]. The purpose of the GPI is to ensure timely detection and an effective response to situations involving inadvertent radiological releases to groundwater in order to prevent migration of licensed radioactive material off-site and to quantify impacts on decommissioning. During 2024, Dresden Station collected and analyzed groundwater samples in accordance with the requirements of approved procedures following regulatory methods..
This section is included in this report to communicate results of NEI 07-07 Radiological Groundwater Monitoring Program. The monitoring wells installed as part of GPI program are sampled and analyzed as summarized in Table 1, Groundwater Protection Program Monitoring Well Sampling Locations. In addition to reporting results from NEI 07-07 monitoring wells, voluntary communications to offsite governmental agencies for onsite leaks or spills per NEI 07-07 Objective 2.2, are also reported as part of this report. It is important to note, samples and results taken in support of NEI 07-07 groundwater monitoring program are not part of the Radiological Environmental Monitoring Program (REMP) but should be reported as part of ARERR.
2.0
Annual Radiological Groundwater Protection Program Report YEAR: 2024 Page 5 of 18 Company: Constellation Plant: Dresden Clean Energy Center Table 1, Groundwater Protection Program Monitoring Well Sampling Locations Site Site Type Location CBG Domestic Water North Well Monitoring Well 150 feet west of the P.A.F., just south of security fence Domestic Water South Well Monitoring Well 200 feet west of old vehicle checkpoint, 100 feet east of hot canal DSP-105 Monitoring Well 30 feet east of east wall of EM Shop DSP-106 Monitoring Well 65 feet east of east wall of EM Shop DSP-107 Monitoring Well 9 feet east of the east Unit 1 Fuel Pool wall DSP-108 Monitoring Well 40 ft east of the Unit 1 Sphere DSP-122 Monitoring Well 50 feet north of the Radwaste Tank Farm DSP-123 Monitoring Well Northeast corner of the Unit 1 Off-gas Building DSP-124 Monitoring Well 9 feet south of Floor Drain Collector Tank DSP-125 Monitoring Well Northeast corner of the Unit 2/3A CST DSP-126 Monitoring Well 21 feet northwest of the northwest bend in road behind Training Building DSP-131 Monitoring Well 35 feet NE of U2/3 Heating Boiler 150k gallon diesel tank DSP-132 Monitoring Well 150 feet NE of U1 Sphere; sewer in middle of road with solid cover DSP-133 Monitoring Well Ditch that runs N of PAF easterly to Kankakee River; sample at side access W of PA DSP-147 Monitoring Well 325 feet west of Telemetry Bridge DSP-148 Monitoring Well 130 feet southeast of the Flow Regulating Station building DSP-149R Monitoring Well 35 feet south by southwest of the 138 KV yard fence DSP-150 Monitoring Well 85 feet east of the northeast corner of the Unit 1 Spent Fuel Pool pad
Annual Radiological Groundwater Protection Program Report YEAR: 2024 Page 6 of 18 Company: Constellation Plant: Dresden Clean Energy Center Table 1, Groundwater Protection Program Monitoring Well Sampling Locations Site Site Type Location DSP-151 Monitoring Well 65 feet N of NE corner of Storeroom DSP-154 Monitoring Well 33 feet west of the track; 165 feet east of the Security Checkpoint DSP-156 Monitoring Well 70 feet E-NE of NW corner of 138 KV fence DSP-157-M Monitoring Well 25 feet S of S edge of employee parking lot DSP-157-S Monitoring Well 25 feet S of S edge of employee parking lot DSP-159-M Monitoring Well 250 feet west of the Thorsen house; 450 ft south of the plant access gate DSP-159-S Monitoring Well 251 feet west of the Thorsen house; 450 ft south of the plant access gate FW-1 Precipitation 40 feet southwest of Unit 2/3 Off-gas Filter Building access door; north end of guardrail FW-2 Precipitation 15 feet south of the U 2/3 Intake Canal FW-3 Precipitation 100 feet north of the security fence, north part of switchyard FW-4 Precipitation 10 feet east of the U 2/3 Trackway, adjacent to the TB south wall FW-5 Precipitation 20 feet west of the concrete be on the north side of the gravel before it forks FW-10 Precipitation At the fence at the northwest corner of the SBO Building FW-11 Precipitation 30 feet east of the east wall of the EM shop; at the stanchion for RGPP well DSP-105 FW-12 Precipitation 60 feet southeast of the southwest corner of the Admin Building; on the security fence MD-11 Monitoring Well Piping located between Condensate Storage Tanks.
MW-DN-101-I Monitoring Well 60 feet north of the Unit 1 Diesel Fuel Storage MW-DN-101-S Monitoring Well 60 feet north of the Unit 1 Diesel Fuel Storage MW-DN-102-S Monitoring Well 13 feet south of the southeast corner of the MUDS Building MW-DN-103-I Monitoring Well 280 feet west of the northwest corner of N-GET Building, 50 feet S of S PA fence MW-DN-103-S Monitoring Well 281 feet west of the northwest corner of N-GET Building, 50 feet S of S PA fense MW-DN-104-S Monitoring Well 50 feet north of Radwaste Tank Farm MW-DN-105-S Monitoring Well 65 feet north of the northeast corner of the Storeroom MW-DN-107-S Monitoring Well 15 feet west by southwest of the Unit 1 CST
Annual Radiological Groundwater Protection Program Report YEAR: 2024 Page 7 of 18 Company: Constellation Plant: Dresden Clean Energy Center Table 1, Groundwater Protection Program Monitoring Well Sampling Locations Site Site Type Location MW-DN-109-I Monitoring Well 8 feet north of Chemistry Building MW-DN-109-S Monitoring Well 8 feet north of Chemistry Building MW-DN-110-S Monitoring Well 25 feet west of the Waste Water Treatment (WWT) Building MW-DN-111-S Monitoring Well 9 feet east of the Floor Drain Collector Tank MW-DN-112-I Monitoring Well 100 feet south of the Chemistry Building MW-DN-112-S Monitoring Well 100 feet south of the Chemistry Building MW-DN-113-S Monitoring Well 91 feet west of the southwest corner of the Administration Building MW-DN-114-I Monitoring Well 50 feet east of the Unit 1 Clean Demineralized Water Tank MW-DN-114-S Monitoring Well 8 feet southwest of the Radiation protection Dept west access doors MW-DN-115-I Monitoring Well 11 feet south of Instrument Maintenance Shop MW-DN-115-S Monitoring Well 12 feet south of Instrument Maintenance Shop MW-DN-116-I Monitoring Well 75 feet south of the Calgon Building roll-up door MW-DN-116-S Monitoring Well 75 feet south of the Calgon Building roll-up door MW-DN-118-S Monitoring Well Southeast corner of the Unit 1 Fuel Pool MW-DN-119-I Monitoring Well 20 feet east by northeast of the Unit 1 Sewage Ejector Building MW-DN-119-S Monitoring Well 21 feet east by northeast of the Unit 1 Sewage Ejector Building MW-DN-122-I Monitoring Well 150 feet north of Collins Road; northeast of the G.E. Fuel Storage Facility MW-DN-122-S Monitoring Well 150 feet north of Collins Road; northeast of the G.E. Fuel Storage Facility MW-DN-124-I Monitoring Well 11 feet south of the liquid nitrogen tanks MW-DN-124-S Monitoring Well 12 feet south of the liquid nitrogen tanks MW-DN-125-S Monitoring Well 40 feet east of 2/3 B CST MW-DN-126-S Monitoring Well 15 feet south of fence around Unit 2/3 A CST and B CST (outside of fence)
MW-DN-127-S Monitoring Well 20 feet south of Unit 3 HRSS MW-DN-134-S Monitoring Well 20 feet North of Mausoleum Building MW-DN-135-S Monitoring Well 20 feet East of Mausoleum Building MW-DN-136-S Monitoring Well 14.5 feet South of Mausoleum Building MW-DN-137-S Monitoring Well 20 feet West of Mausoleum Building MW-DN-140-S Monitoring Well East of MW-DN-104S at SW corner outside of 2/3 crib house
Annual Radiological Groundwater Protection Program Report YEAR: 2024 Page 8 of 18 Company: Constellation Plant: Dresden Clean Energy Center Table 1, Groundwater Protection Program Monitoring Well Sampling Locations Site Site Type Location MW-DN-141-S Monitoring Well North of A Waste Tank next to 2/3 main chimney MW-DN-142-S Monitoring Well 338 feet NW of Mausoleum Building MW-DN-143-S Monitoring Well 408 feet NW of Mausoleum Building MW-DN-144-S Monitoring Well 458 feet NW of Mausoleum Building RW-DN-100-S Recovery Well 50 feet W of MD-11 RW-DN-101-S Recovery Well 50 feet E of MD-11
Annual Radiological Groundwater Protection Program Report YEAR: 2024 Page 9 of 18 Company: Constellation Plant: Dresden Clean Energy Center Radiological Groundwater Monitoring Program tritium results are summarized in Table 2, Groundwater Protection Monitoring Well Tritium and Strontium in Ground Water Samples (pCi/L +/- 2 sigma). No groundwater monitoring locations had detectable gamma or HTD in 2024 Table 2, Groundwater Protection Monitoring Well Tritium and Strontium in Ground Water Samples (pCi/L +/- 2 sigma)
Site Collection Date H-3 Sr-89 Sr-90 CBG 2/27/2024 441
+/-
138 5/28/2024 692
+/-
155 8/13/2024 287
+/-
126 10/21/2024 188 10/21/2024B 186 DSP-106 2/27/2024 897
+/-
171 5/31/2024 869
+/-
175
< 8
< 0.7 8/15/2024 912
+/-
176 10/24/2024 720
+/-
157 DSP-107 2/27/2024 1200
+/-
200 5/31/2024 1610
+/-
239
< 6
< 0.7 8/15/2024 1120
+/-
195 10/24/2024 1150
+/-
193 DSP-108 2/27/2024 199 5/30/2024 257
+/-
133
< 3
< 0.9 8/15/2024 207
+/-
129 10/23/2024 187 DSP-122 2/28/2024 1560
+/-
232 5/30/2024 1600
+/-
242
< 4
< 0.7 8/16/2024 1370
+/-
214 10/23/2024 1400
+/-
217 DSP-123 2/28/2024 188 5/30/2024 196
< 4
< 0.9 8/15/2024 196 10/23/2024 190 DSP-124 2/26/2024 311
+/-
130 5/28/2024 576
+/-
146
< 5
< 0.8 8/12/2024 263
+/-
133 10/22/2024 323
+/-
129 DSP-125 2/27/2024 190 5/29/2024 199
< 8
< 0.8 8/12/2024 195 10/21/2024 190 B Reanalysis
Annual Radiological Groundwater Protection Program Report YEAR: 2024 Page 10 of 18 Company: Constellation Plant: Dresden Clean Energy Center Table 2, Groundwater Protection Monitoring Well Tritium and Strontium in Ground Water Samples (pCi/L +/- 2 sigma) Contd Site Collection Date H-3 Sr-89 Sr-90 DSP-126 5/30/2024 194 DSP-147 5/29/2024 197 DSP-148 5/30/2024 318 +/-
130 DSP-149 5/30/2024 309 +/-
130 DSP-150 5/31/2024 199 DSP-154 5/30/2024 164 DSP-159M 5/28/2024 342 +/-
136 DSP-159S 5/28/2024 198 MD-11 2/27/2024 4870 +/-
554 5/29/2024 4820 +/-
584
< 8
< 0.9 5/29/2024B 5060 +/-
574 8/13/2024 6220 +/-
693 10/21/2024 5700 +/-
632 MW-DN-101I 2/28/2024 249 +/-
127 5/30/2024 235 +/-
131
< 2
< 0.8 8/15/2024 299 +/-
122 10/23/2024 190 MW-DN-101S 2/28/2024 190 5/30/2024 195
< 7
< 0.9 8/15/2024 176 10/23/2024 188 MW-DN-102S 5/29/2024 222 +/-
129 5/29/2024A 221 +/-
129 5/29/2024B 321 +/-
136 MW-DN-103I 5/28/2024 200 MW-DN-103S 5/28/2024 195 MW-DN-104S 2/28/2024 187 5/30/2024 370 +/-
136
< 5
< 0.9 8/16/2024 248 +/-
117 10/23/2024 242 +/-
127 MW-DN-105S 2/27/2024 191 5/30/2024 194
< 9
< 0.8 8/16/2024 171 10/23/2024 187 MW-DN-106S 8/14/2024 176 +/-
111 A Recount B Reanalysis
Annual Radiological Groundwater Protection Program Report YEAR: 2024 Page 11 of 18 Company: Constellation Plant: Dresden Clean Energy Center Table 2, Groundwater Protection Monitoring Well Tritium and Strontium in Ground Water Samples (pCi/L +/- 2 sigma) Contd Site Collection Date H-3 Sr-89 Sr-90 MW-DN-107S 2/27/2024 191 5/30/2024 196
< 9
< 0.8 8/15/2024 177 10/23/2024 181 MW-DN-109I 2/28/2024 278 +/-
128 5/31/2024 247 +/-
132
< 9
< 0.9 8/15/2024 322 +/-
119 10/22/2024 185 MW-DN-109S 2/28/2024 193 5/31/2024 197
< 3
< 1 8/15/2024 171 10/22/2024 182 MW-DN-110S 5/31/2024 198 MW-DN-111S 2/26/2024 8020 +/-
867 2/26/2024A 8560 +/-
925 2/26/2024B 8150 +/-
876 5/28/2024 6700 +/-
734
< 7
< 0.7 5/28/2024A 6850 +/-
751 5/28/2024B 6510 +/-
717 8/12/2024 6420 +/-
697 10/22/2024 5570 +/-
619 MW-DN-112I 5/28/2024 260 +/-
130 10/22/2024 478 +/-
132 MW-DN-112S 5/28/2024 185 MW-DN-113S 5/31/2024 192 MW-DN-114I 5/29/2024 382 +/-
133 10/21/2024 1620 +/-
233 MW-DN-114S 2/27/2024 273 +/-
129 5/29/2024 183
< 9
< 0.7 8/13/2024 175 10/21/2024 1500 +/-
224 MW-DN-115I 5/31/2024 284 +/-
126 10/22/2024 283 +/-
126 MW-DN-115S 2/27/2024 337 +/-
134 5/31/2024 187
< 7
< 0.9 8/13/2024 171 10/22/2024 179 MW-DN-116I 5/30/2024 193 A Recount B Reanalysis
Annual Radiological Groundwater Protection Program Report YEAR: 2024 Page 12 of 18 Company: Constellation Plant: Dresden Clean Energy Center Table 2, Groundwater Protection Monitoring Well Tritium and Strontium in Ground Water Samples (pCi/L +/- 2 sigma) Contd Site Collection Date H-3 Sr-89 Sr-90 MW-DN-116S 2/28/2024 195 5/30/2024 196 6
< 0.6 8/16/2024 257 +/-
120 10/23/2024 180 MW-DN-118S 2/27/2024 194 5/31/2024 195 2
< 0.8 8/15/2024 171 10/24/2024 180 MW-DN-119I 2/27/2024 193 5/30/2024 196 6
< 0.9 8/16/2024 171 10/23/2024 185 MW-DN-119S 2/27/2024 189 5/30/2024 196 4
< 0.7 8/16/2024 174 10/23/2024 184 MW-DN-122I 5/30/2024 197 MW-DN-122S 5/30/2024 199 MW-DN-124I 2/26/2024 378 +/-
133 5/29/2024 198 10
< 0.9 8/16/2024 172 10/22/2024 180 MW-DN-124S 2/26/2024 287 +/-
129 5/29/2024 311 +/-
132 6
< 0.8 8/16/2024 229 +/-
116 10/22/2024 538 +/-
135 MW-DN-125S 5/28/2024 296 +/-
130 10/22/2024 188 +/-
122 MW-DN-126S 2/26/2024 189 5/29/2024 196 7
< 0.8 8/13/2024 173 10/21/2024 179 MW-DN-127S 5/29/2024 200 10/22/2024 188 MW-DN-134S 5/29/2024 186 MW-DN-135S 5/29/2024 197 A Recount B Reanalysis
Annual Radiological Groundwater Protection Program Report YEAR: 2024 Page 13 of 18 Company: Constellation Plant: Dresden Clean Energy Center Table 2, Groundwater Protection Monitoring Well Tritium and Strontium in Ground Water Samples (pCi/L +/- 2 sigma) Contd Site Collection Date H-3 Sr-89 Sr-90 MW-DN-136S 2/28/2024 193 5/29/2024 255 +/-
127
< 3
< 0.9 8/13/2024 175 10/24/2024 184 MW-DN-137S 5/29/2024 188 MW-DN-140S 2/28/2024 193 5/30/2024 220 +/-
127
< 9
< 0.8 8/16/2024 173 10/24/2024 185 MW-DN-141S 2/27/2024 284 +/-
354 5/30/2024 1910 +/-
268
< 8
< 0.9 8/16/2024 2590 +/-
331 10/23/2024 2970 +/-
361 MW-DN-142S 5/31/2024 191 MW-DN-143S 5/29/2024 196 MW-DN-144S 5/29/2024 194 RW-DN-100S 2/27/2024 1140 +/-
194 5/29/2024 1400 +/-
217
< 3 0.7 8/13/2024 1390 +/-
218 10/22/2024 501 +/-
136 RW-DN-101S 2/27/2024 10700 +/-
1130 2/27/2024A 11700 +/-
1230 2/27/2024B 9950 +/-
1060 5/29/2024 15900 +/-
1650
< 9 0.8 5/29/2024B 18500 +/-
1910 8/13/2024 298 +/-
125 10/22/2024 298 +/-
185 A Recount B Reanalysis
Annual Radiological Groundwater Protection Program Report YEAR: 2024 Page 14 of 18 Company: Constellation Plant: Dresden Clean Energy Center Table 3, Groundwater Protection Program Monitoring Well Gamma Isotopic in Groundwater Samples (pCi/L +/- 2 sigma)
No Groundwater Samples Analyzed for Gamma Isotopic in 2024
Annual Radiological Groundwater Protection Program Report YEAR: 2024 Page 15 of 18 Company: Constellation Plant: Dresden Clean Energy Center Table 4, Groundwater Protection Program Monitoring Well Hard-To-Detects in Groundwater Samples (pCi/L +/- 2 sigma)
Site Collection Date Fe-55 Ni-63 Am-241 Cm-242 CM-243/244 Pu-238 Pu-239/240 U-234 U-235 U-238 DSP-107 5/31/2024
< 81
< 4 DSP-108 5/30/2024
< 69
< 4 DSP-123 5/30/2024
< 124
< 4 MD-11 5/29/2024
< 52
< 4
< 0.02
< 0.05
< 0.02
< 0.1
< 0.04
< 0.03
< 0.03 0.07 MW-DN-101I 5/30/2024
< 69
< 4 MW-DN-101S 5/30/2024
< 53
< 4 MW-DN-105S 5/30/2024
< 109
< 3 MW-DN-116S 5/30/2024
< 38
< 4 MW-DN-119I 5/30/2024
< 56
< 3 MW-DN-119S 5/30/2024
< 60
< 5 MW-DN-124I 5/29/2024
< 60
< 4
< 0.2
< 0.04
< 0.04
< 0.05
< 0.05
< 0.08
< 0.09 0.2 MW-DN-124S 5/29/2024
< 76
< 4
< 0.07
< 0.03
< 0.03
< 0.1
< 0.1
< 0.07
< 0.09 0.07
Annual Radiological Groundwater Protection Program Report YEAR: 2024 Page 16 of 18 Company: Constellation Plant: Dresden Clean Energy Center Table 5, Groundwater Protection Monitoring Well Tritium in Precipitation Water Samples (pCi/L +/- 2 sigma)
Site Collection Date H-3 DN-FW-1 2/28/2024 734 +/-
158 5/31/2024 615 +/-
147 8/15/2024 291 +/-
124 11/26/2024 519 +/-
136 DN-FW-10 5/31/2024 190 8/15/2024 192 11/26/2024 179 DN-FW-11 2/28/2024 187 5/31/2024 189 8/15/2024 190 11/26/2024 185 DN-FW-12 5/31/2024 187 8/15/2024 188 11/26/2024 182 DN-FW-13 5/31/2024 190 8/15/2024 186 11/26/2024 186 DN-FW-14 5/31/2024 231 +/-
125 8/15/2024 221 +/-
123 11/26/2024 340 +/-
128 DN-FW-2 5/31/2024 249 +/-
128 8/15/2024 196 11/26/2024 245 +/-
125 DN-FW-3 2/28/2024 820 +/-
164 5/31/2024 567 +/-
143 11/26/2024 390 +/-
128 DN-FW-4 11/26/2024 177 DN-FW-5 5/31/2024 191 8/15/2024 189 11/26/2024 182
Annual Radiological Groundwater Protection Program Report YEAR: 2024 Page 17 of 18 Company: Constellation Plant: Dresden Clean Energy Center 2.1 Voluntary Notification During 2024, Dresden Clean Energy Center did not make a voluntary NEI 07-07 notification to State/Local officials, NRC, and to other stakeholders required by site procedures.
Annual Radiological Groundwater Protection Program Report YEAR: 2024 Page 18 of 18 Company: Constellation Plant: Dresden Clean Energy Center BIBLIOGRAPHY
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Nuclear Energy Institute, Washington, D.C., 2019.
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[6] "Regulatory Guide 1.109 - Calculation of Annual Doses to Man from Routine Releases of Reactor Effluents for the Purpose of Demonstrating Compliance with 10 CFR Part 50, Appendix I," Nuclear Regulatory Commission, Ocotober, 1977.
[7] "NUREG-0133 - Preparation of Effluent Technical Specifications for Nuclear Power Plants,"
Nuclear Regulatory Commission, 1987.
[8] "NCRP Report No. 160 - Ionizing Radiation Exposure of the Population of the United States,"
National Council on Radiation Protection and Measurements, Bethesda, MD, 2009.
[9] Health Physics Society, [Online]. Available: http://hps.org/hpspublications/radiationfactsheets.html.
[Accessed 2020].
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