NC0007064_Discharge Channel Tritium Summary_20240510

b' Southport,Brunswick steam Electric Plant
ENERGY u River Road 61
uthpthp ort,NC 28461
MAY 0 6 2024
Serial: RA-24-0135 RECENE�
Mr. Doug Dowden MAY 10 2024
Municipal Permitting Unit Supervisor
Division of Water Resources wBINppES
NC Department of Environmental Quality NGDEQIp
1617 Mail Service Center
Raleigh, NC 27699-1617
Reference: Duke Energy Carolinas, LLC — Brunswick Steam Electric Plant
2023 Discharge Channel Tritium Summary k3cp'l c(
Dear Mr. Dowden,
This letter fulfills the Brunswick Steam Electric Plant's (BSEP) agreement to provide your office
with summary information regarding concentrations of tritium in discharges from the plant.
Duke Energy Progress, LLC, is providing your office with a summary page containing analytical
data regarding tritium concentrations in conjunction with the development and submittal to
the U.S. Nuclear Regulatory Commission (NRC) of the 2023 BSEP Annual Radiological
Environmental Operating Report. This information is being provided with the understanding
that it is generated pursuant to the requirements of the nuclear operating licenses issued by
the NRC to the plant and is not a requirement of the NPDES program.
If any questions or if further discussions are needed, please do not hesitate to contact Mr. Drew
Petrusic, BSEP Environmental Field Support, (910-832-2728 or drew.petrusic@duke-
energy.corn).
Sincerely,
G2/< 2P
Jay Ratliff
Plant Manager
Brunswick Steam Electric Plant
Enclosure: 2023 BSEP Discharge Channel Tritium Sampling and Data
cc. Sergei Chernikov, NCDEQ, NPDES Wastewater Permitting
Don Safrit, Duke Energy Carolinas, Permitting and Compliance
Eric Caison, BSEP Nuclear Environmental Field Support

2023 BSEP Discharge Channel Tritium Sampling and Data
Monthly samples are collected upstream of the ocean discharge pumps which pump water
from the BSEP discharge channel into the Atlantic Ocean (NPDES Outfall 001). The samples are
collected over a month time period using a composite sampler with, typically, 50 milliliter
aliquots being collected every 4 hours. Zero (0) of the twelve samples from the discharge
channel indicated the presence of tritium. This is based on the sample analysis lower limit of
detection (LLD) criterion of 250 pCi/L.
Analysis Results
Sample Period Tritium Concentration
(pCi/L)
1/3/2023 - 2/1/2023 < LLD
2/1/2023—3/1/2023 < LLD
3/1/2023—4/2/2023 < LLD
4/2/2023—5/1/2023 < LLD
5/1/2023—6/1/2023 < LLD
6/1/2023—7/2/2023 < LLD
7/2/2023—8/1/2023 < LLD
8/1/2023—9/5/2023 < LLD
9/5/2023—10/4/2023 < LLD
10/4/2023— 11/2/2023 < LLD
11/2/2023—12/4/2023 < LLD
12/4/2023—1/1/2024 < LLD
2023 BSEP Discharge Channel Tritium
—I--Discharge Channel Water Quality Criterion
32000
30000
28000
26000 —
24000
22000
20000
; 18000
ti 16000
u 14000
12000
10000
8000
6000
4000
2000
0 —• ♦ ♦ , ♦ , ♦ ♦ ♦ , ♦ ♦ ♦ , ♦
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month