ML25086A169
| ML25086A169 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 03/27/2025 |
| From: | Noval W Holtec Decommissioning International |
| To: | Office of Nuclear Material Safety and Safeguards, Document Control Desk |
| References | |
| HDI BRP 2025-004 | |
| Download: ML25086A169 (1) | |
Text
HOLTEC DE CO MMI SSI O NI N G INTERN A TION A L Krishna P. Singh Technology Campus, 1 Holtec Blvd., Camden, NJ 08104 Telephone (856) 797-0900 Fax(856)797-0909 HDI BRP 2025-004 March 27, 2025 U.S. Nuclear Regulatory Commission ATTN : Document Control Desk Washington, DC 20555-0001 Big Rock Point Docket No. 50-155 and 72-043 Facility Operating License No. DPR-6 Technical Specification 6.6.2
Subject:
Annual Radiological Environmental Operating Report In accordance with the requirements of Big Rock Point (BRP) Defueled Technical Specifications Section 6.6.2, Annual Radiological Environmental Operating Report, Holtec Decommissioning International, LLC (HDI) on behalf of Holtec Palisades, LLC (Holtec Palisades) is submitting the 2024 Radiological Environmental Operating Report for the BRP Independent Spent Fuel Storage Installation (ISFSI). The report was prepared in accordance with the requirements of Title 10 of the Code of Federal Regulations Part 50, Appendix I,Section IV.Band IV.C. The period covered by the enclosed report is January 1, 2024, through December 31, 2024.
This letter contains no new and no revised regulatory commitments.
Should you have any questions or require additional information, please contact Amy Filbrandt, Acting Regulatory Assurance Manager at (269) 764-2520.
Respectfully, William Naval William Noval Digitally signed by William Naval ON: cn=William Naval, o=HDI, ou=Regulatory Affairs, email=w.noval@holtec.com Date: 2025.03.27 11 :55:40 -04'00' Director Regulatory Affairs Holtec Decommissioning International, LLC
Enclosure:
Annual Radiological Environmental Operating Report cc:
NRC Region Ill Regional Administrator NRC Decommissioning Inspector - Big Rock Point NRC NMSS Project Manager-Big Rock Point American Nuclear Insurers (ANI)
Enclosure to HDI BRP 2025-004 Annual Radiological Environmental Operating Report
Plant: Big Rock Point YEAR: 2024 Document Number: HDI BRP 2025-004 Annual Radiological Environmental Operating Report 1I Page
2024 Annual Radiolo ical Environmental 0 I.
Introduction The 2024 Big Rock Point (BRP) Annual Radiological Environmental Operating Report provides a summary and data interpretation of the BRP Radiological Environmental Monitoring Program (REMP) as conducted during the 2024 reporting period. Reporting requirements are detailed in the BRP Defueled Technical Specification 6.6.2 and Offsite Dose Calculation Manual (ODCM).
The BRP ODCM contains the requirements for the REMP. The radiological environmental monitoring sampling requirements are greatly reduced from the plant's operating period and now only encompass Independent Spent Fuel Storage Installation (ISFSI) operations.
Tables 1, 2, and 3 of this enclosure, provide a summary of 2024 BRP REMP sample requirements and results.
II.
Discussion and Interpretation of Results A.
TLDs - Gamma Dose The BRP Gamma Dose Assessment Program consists of eleven thermoluminescent dosimeter (TLD) locations: Four at the outside perimeter of the ISFSI (locations: BR-18, BR-19, BR-20, and BR-21 ), four at the ISFSI protected area fence line (locations:
BR-22, BR-23, BR-24, and BR-25), and three control TLDs, approximately 13 miles out (locations: BR-5 Petoskey, BR-6 Boyne City, and BR-7 Ironton). These are the only TLDs required for ISFSI operation. Environmental gamma doses are measured quarterly by placement of one TLD badge per designated location. Detailed sample station identification and location information is provided in Attachment 2.
For 2024, the average quarterly gamma readings were:
19.6 millirem for protected area fence TLDs, 15.2 millirem for ISFSI outside perimeter TLDs, and 16.0 millirem for the control TLD locations.
2I Page
2024 Annual Radiolo ical Environmental 0 The comparative evaluation of the protected area fence, the ISFSI outside perimeter and the control TLD's are very similar to that of 2023. All values trend as expected.
A comparative evaluation was also completed of the 2024 offsite control TLD data to the ISFSI outside perimeter TLD data. There was excellent correlation between the off-site control TLDs and the ISFSI outside perimeter TLDs. There was no significant difference between the 2023 and 2024 control data.
Each TLD badge contains a 4-chip TLD that meets ANSI N545-1977 requirements.
Dosimetry reports show gross and net dosage. Gross dosage includes the dosage to the controls. Net dosage shows net exposure after control subtraction. This report uses gross dosage to illustrate readings.
B.
Air Samples The BRP REMP no longer requires that airborne surveillance be conducted.
C.
Milk The BRP REMP no longer requires that milk samples be collected.
D.
Lake Water The BRP REMP no longer requires that lake water samples be collected.
E.
Drinking Water The BRP REMP no longer requires that drinking water samples be collected.
F.
Crops The collection of food crops/vegetation is not required by the BRP REMP.
G.
Sediment The BRP REMP no longer requires that well water samples be collected.
H.
Aquatic Biota The collection of aquatic biota (algae and periphyton) is no longer required by the BRP REMP.
3I Page
2024 Annual Radiolo ical Environmental 0 Ill. Assessment of BRP ISFSI Operational Environmental Impact Review and comparison of the 2024 BRP radiological environmental monitoring data to previous data shows that the parameters analyzed support the conclusion that ISFSI operations have had minimal environmental impact.
41 Page
2024 Annual RadioloQical Environmental 0 Plant: BiQ Rock Point Table 1. Sampling and Analysis Summary Number of Samples Freguency of Medium Description Location(s)
Type of Analysis Collected Analysis TLD BR-5, BR-6, BR-7, 18-25 BRP, 5-PT, Gamma Isotopic 44 Quarterly a BR-18-25 6-BC, 7-IR Lake Water 1 gallon composite 1-ST
- Tritium, 0
No Longer Required Gamma Isotopic Well Water 1 gallon Site Well
- Tritium, 0
No Longer Required grab/composite Gamma Isotopic Monitoring Wells 1 gallon grab MW 1-9
- Tritium, 0
No Longer Required Gamma Isotopic Sediment Grab 1-ST, 24-STS, Gamma Isotopic 0
No Longer Required 25-STN, 26-LP Fish Grab 1-ST Discharge Gamma Isotopic 0
No Longer Required Table Notes a Only quarterly TLDs are required per Big Rock Point ODCM SI Page
Medium or Pathway Sampled (Units)
Direct Radiation:
TLD - Protected Area (mR)
Fence TLD - ISFSI Outside (mR)
Perimeter Waterborne:
Lake Water (pCi/L)
Well Water (pCi/L)
Lake Sediment:
Sediment (pCi/g dry)
Biota:
Fish (pCi/g wet)
Crayfish (pCi/g wet)
Table Notes:
2024 Annual RadioloQical Environmental 0 Analysis Evaluated Versus Total Number Analyses Performed TLD (quarterly) de 16/16 TLD (quarterly) d e 16/16 Sample not required Sample not required Sample not required Sample not required Sample not required Plant: BiQ Rock Point Table 2. Sample Data Summary a Lower Limit of Detection (LLD) b 1.0 1.0 All Indicator Locations Mean c (Range) 16/16 16/16 19.6 (14.25-31) 15.2 (12-20) a Values for sample locations with the greatest annual mean are provided in Table 3.
All Control Locations Mean c (Range) 11 /11 11 /11 16.0 (12.5-19) 16.0 (12.5-19) b Nominal LLD as defined in the Big Rock Offsite Dose Calculation Manual Section I, Table 1-3 and vendor analytical capabilities.
c Mean and range data reported are based upon detectable measurements.
d Quarterly TLD results are normalized for 91 days net.
- Quarterly TLDs are read quarterly. Quarterly measurements are compared to control measurements to evaluate compliance with 10 CFR 72.104.
The results for the ISFSI TLDs and the average of the control TLDs measured in 2024 are summarized in the Table.
61 Page Non routine Measurements None' None1
Medium TLD - Protected Area Fence (mR)
TLD - ISFSI Outside Perimeter (mR)
Lake Water (pCi/L)
Well Water (pCi/L Sediment (pCi/g dry)
Fish (pCi/g wet)
Crayfish (pCi/g wet)
Table Notes:
2024 Annual RadioloQical Environmental 0 Plant: BiQ Rock Point Table 3. Reporting Results Greatest Mean Sampling Location Type of Analysis Location TLD (Quarterly) ab BRP-23 TLD (Quarterly) ab BRP-19 No Longer Required No Longer Required No Longer Required No Longer Required No Longer Required High 31 19 Low 23.8 15.3 a Quarterly TLD results are normalized for 91 days net.
Mean 25.9 16.6 b Quarterly TLDs are read quarterly. Quarterly measurements are compared to control measurements to evaluate compliance with 10 CFR 72.104. The results for the ISFSI TLDs and the average of the control TLDs measured in 2024 are summarized in the Table.
71 Page
2024 Annual Radiolo ical Environmental 0 Sample Collection Anomalies 03 and 04 environmental readings are not available from our dosimetry vendor Landauer. Human error occurred and they were not able to produce the appropriate environmental reports. Annual data was collected and that data corresponds with the quarterly data obtained. The annual values were divided by 4 to represent the quarterly average and these values were used to represent 03 and 04 for this report.
Bl Page
2024 Annual Radioactive Environmental 0 Plant: Bi Rock Point TABLE 1-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM Exposure Pathway Number of Representative Samples Sampling and and/or Sample and Sample Locations a Collection Frequency
- 1. Direct Radiation b 11 monitoring stations either with two Quarterly or more TLDs or one instrument for measuring and recording dose rate continuously, placed as follows c:
a) Balance of stations (3) placed to serve as control stations b) Outside perimeter of ISFSI (4)d c) ISFSI protected area fence line 4 d Type and frequency of Analysis Gamma dose quarterly
- a.
Deviations are permitted from the required sampling schedule if specimens are unobtainable due to hazardous conditions, seasonal unavailability, malfunction of automatic sampling equipment and other legitimate reasons. If specimens are unobtainable due to sampling equipment malfunction, every effort shall be made to complete corrective action prior to the end of the next sampling period. All deviations from the sampling schedule shall be documented in the Annual Radiological Environmental Operating Report pursuant to the Reporting Requirements of ODCM. Alternative media and locations may be chosen for any pathway if designated locations or media are not available, and appropriate substitutions are made within 30 days in the radiological environmental monitoring program.
- b.
One or more instruments, such as a pressurized ion chamber, for measuring and recording dose rate continuously may be used in place of, or in addition to, integrating dosimeters. The background dosimetry requirement also may be met through use of dosimeters shared with another facility, or from data provided by another entity, such as the State of Michigan, as appropriate for this site.
- c.
For the purposes of this table, a TLD is one phosphor; two or more phosphors or phosphor readout zones in a packet are considered as two or more dosimeters.
- d.
TLDs designated for ISFSI only operation.
91 Page
2024 Annual Radioactive Environmental 0 Plant: Bi Rock Point Big Rock Point Environmental Sample Locations 10 I P age
2024 Annual Radioactive Environmental Operating Report Plant: Big Rock Point BIG ROCK POINT CONTROL TLD LOCATIONS
-BR*S(PT)
PETOSKEY BR-6 (BC)
BOYNE CITY BR-7 (IR)
IRONTON 11 I Page
2024 Annual Radioactive Environmental Operating Report Plant: Big Rock Point Radiological Environmental Monitoring Program (REMP) Data for Big Rock Point (BRP) Independent Spent Fuel Storage Installation (ISFSI) 121 Page
2024 Annual Radioactive Environmental Operating Report ENTERGY BIG ROCK TOM LACROIX 10269 US 31 N CHARLEVOIX, Ml 49720 Rennrt D*te !YYYY-MM-DDI P*ge Dosimeter Received QC Rele*se An*"""'~' Wort< Order Environmental Dosimetry Report Account :
489346 Location ID Dosimeter Identifier Number Type (Client Supplied)
Monitoring Pl riod:
00000 V03NN Tran sit Control VOJNN Control Dose Used 00794 V03NN BR-5 00795 V03NN BR-6 00796 V03NN BR-6 00797 VOJNN BR-18 00798 V03NN BR-19 00799 VOJNN BR-20 00800 VOJNN BR-22 00801 VOJNN BR-23 00802 V03NN BR-24 00803 VOJNN BR-25 00804 V03NN BR.SH1 00805 V03NN BR-SH2 00806 VOJNN BR..CTRL 1 00807 V03NN BR--CTRL 2 00808 V03NN BR-21 00809 V03NN BR-SP2 00810 VOJNN BR-SP1 Plant: Big Rock Point 2024-04-09 1 of 1 2024-04-08 LCA 2409601095 LANDAUER LANDAUER, Inc., 2 Science Road Glenwood, Illinois 60425-1586 landauer.com Telephone: (708) 755-7000 Facsimile: (708) 755-7016 Customer Service: (800) 323-8830 Technical: (800) 438-3241 Exposure (Ambient Dose mrem)
Net Cumulative Totals (mrem)
Inception Date Serial Number Gross Net Quarter to Date Year to Date Permanent (YYYY-MM) 2024-01-01 to 2024-03-31 Q1 2024 2024-01 EX000709895 11 16 0
2024-01 EX00101657U 17 5
2024-01 EX000700813 17 6
2024-01 EX00063245U 16 5
2024-01 EX000940120 17 6
2024-01 EX001008490 14 0
2024-01 EX00020242B 16 0
2024-01 EX000290319 25 14 2024-01 EX00065499B 18 7
2024-01 EX00070973I 18 7
2024-01 EX00028967D 11 0
2024-01 EX00089813F 11 0
2024-01 EX00082289F 11 0
2024-01 EX00060730Y 11 0
2024-01 EX00056614Q 13 0
2024-01 EX001004328 12 0
2024-01 EX00080724N 11 0
2024-01 EX000819930 13I Page
2024 Annual Radioactive Environmental Operating Report ENTERGY BIG ROCK TOM LACROIX 10269 US 31 N CHARLEVOIX, Ml 49720 RePon Date CYYYY-MM-DD)
Page Dosimeter Received QC Release Ana1vtv-~1 Wotlt Order Environmental Dosimetry Report Account : 489346 Location ID Dosimeter Identifier Number Type (Client Supplied)
Monitoring PE lriod:
00000 V03NN Tran sit Control 00000 V03NN Tran sit Control V03NN Control Dose Used 00830 V03NN BR-5 00831 V03NN BR-6 00832 V03NN BR-7 00833 V03NN BR-18 00834 V03NN BR-19 00835 V03NN BR-20 00836 V03NN BR-21 00837 V03NN BR-22 00838 V03NN BR-23 00839 V03NN BR-24 00840 V03NN BR-25 00841 V03NN BR-SP1 00842 V03NN BR-SP2 Plant: Big Rock Point 2024-07-09 1 of 1 2024.07-08 LCA 24 185001 41 Exposure (Ambient Dose mrem)
Net Cumulative Totals (mrem)
LANDAUER LANDAUER, Inc., 2 Science Road Glenwood, Illinois 60425-1586 landauer.com Telephone: (708) 755-7000 Facsimile: (708) 755-7016 Customer Service: (800) 323-8830 Technical: (800) 438-3241 Inception Date Serial Number Gross Net Quarter to Date Year to Date Permanent (YYYY-MM) 2024-04-01 to 2024--06-30 02 2024 2024-04 EX000896197 2024-04 EX00099425G 12 19 7
2024-04 EX00088278C 19 7
2024-04 EX001073053 19 8
2024-04 EX000998456 18 6
2024-04 EX00069651N 19 7
2024-04 EX00099226I 20 8
2024-04 EX00093275L 17 5
2024-04 EX00051971P 20 8
2024-04 EX00069160Y 31 19 2024-04 EX00088624H 20 8
2024-04 EX00041984K 22 10 2024-04 EX00099240S 13 0
2024-04 EX00107753U 14 0
2024-04 EX00060804R 14 I P age
2024 Annual Radioactive Environmental Operating Report ENTERGY BIG ROCK TOM LACROIX 10269 US 31 N CHARLEVOIX, Ml 49720 Reoort Dale {YYYY-MM-0D)
Page Dosimettt~-i OC RGIOGIO AnaJytical WOllt Order Environmental Dosimetry Report Account :
489346 Location ID Dosimeter Identifier Number Type (Cllent Supphed)
Monitoring P riod:
00000 V03NN Transit Control V03NN Control Dose Used 00812 V03NN BR-5 00813 V03NN BR-6 00814 V03NN BR-7 00815 V03NN BR-1 8 00816 V03NN BR-19 00817 V03NN BR-20 00818 V03NN BR-21 00819 V03NN BR-22 00820 V03NN BR-23 00821 V03NN BR-24 00822 V03NN BR-25 00823 V03NN BR-SH1 00824 V03NN BR-SH2 00825 V03NN BR-CTRL 1 00826 V03NN BR-CTRL2 00827 V03NN BR-SP 1 00828 V03NN BR-SP2 Plant: Big Rock Point 202S-01-22 1 of 1 2026-01-14 LCA 2500900253 Exposure (Ambient Dose mrem)
Net Cumulative Totals (mrem)
LANDAUER LANDAUER, Inc., 2 Scienoe Road Glenwood, Illinois 60425-1586 landauer.oom Telephone: (708) 755-7000 Facsimile: (708) 755-7016 Customer SclVICC: (800) 323-8830 Technical: (800) 438-3241 Inception Date Serial Numbef Gross Net Quarter to Date Ye3ftoDate Permanent (YYYY-MM) 2024-01-01 to 2024-12-31 0 1 2024 2024-01 EX00069426K 35 50 15 2024-01 EX00081794F 62 27 2024-01 EX000991978 57 23 2024-01 EX000250264 48 14 2024-01 EX00051769E 61 26 2024-01 EX00062605R 60 25 2024-01 EX001009016 50 16 2024-01 EX00100499R 65 30 2024-01 EX000895876 95 60 2024-01 EX00099401Q 71 36 2024-01 EX00101179Y 57 23 2024-01 EX001014164 35 0
2024-01 EX00039068Q 37 0
2024-01 EX001000296 32 0
2024-01 EX00102023G 30 0
2024-01 EX001030566 32 0
2024-01 EX00056698A 35 0
2024-01 EX00086603N 15I Page