ML25132A160

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Correction to 2023 Radioactive Effluent Release Report
ML25132A160
Person / Time
Site: South Texas, 07201041  STP Nuclear Operating Company icon.png
Issue date: 05/12/2025
From: Grones S
South Texas
To:
Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation, Document Control Desk
References
NOC-AE-25004108, 35734440
Download: ML25132A160 (1)
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Text

May 12, 2025 NOC-AE-25004108 10 CFR 50.36a STI: 35734440 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 South Texas Project Units 1 and 2 Docket Nos. STN 50-498; STN 50-499; and 72-1041 Correction to 2023 Radioactive Effluent Release Report

Reference:

Letter, J. Hoffman (STP) to Document Control Desk (NRC); South Texas Project Units 1 & 2 Docket Nos. 50-498; 50-499; 72-1041 2023 Radioactive Effluent Release Report; April 24, 2024; (NOC-AE-24004035) (ML24117A160)

This letter submits a correction to the South Texas Projects Annual Radioactive Effluent Release Report, for the period of January 1, 2023, through December 31, 2023, previously submitted in the Referenced letter. The enclosure to this letter reflects a change to Section 4 (page 4-2, 4-4, 4-6, and 4-8), which included information on gaseous effluent releases by the type of effluent (i.e.

fission and activation gases, radioiodine, particulates, tritium, and carbon-14). The tables enclosed contain the revised actual gaseous effluent activity in 2023.

There are no commitments in this letter.

If there are any questions on this report, please contact me at (361) 972-7596, or Stephanie Rodgers at (361) 972-4527.

Scott Grones Manager, Chemistry & Safety

Enclosure:

2023 Radioactive Effluent Release Report Revision 1 cc:

Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 1600 E. Lamar Boulevard Arlington, TX 76011-4511 Scott Grones Digitally signed by Scott Grones Date: 2025.05.12 08:27:28 -05'00'

2023 Radioactive Effluent Release Report SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION Completed by Generation in accordance with Technical Specifications for United States Nuclear Regulatory Commission Renewed Facility Operating License Nos.

NPF-76 & NPF-80 April 2024 Revision 1 Authored by:

Shaterika N. Brown Consulting Chemist Chemistry Division Technical Review:

James R. Flournoy Consulting Chemist Chemistry Division Approved by:

Scott Grones Manager Chemistry Division 0PGP03ZX0007, Preparation of the Radioactive Effluent Release Report South Texas Identification (STI): 35545210

     

   

 

RADIOACTIVE EFFLUENT RELEASE REPORT 2023 SOUTH TEXAS PROJECT Gaseous Effluents 4-2 STP NUCLEAR OPERATING COMPANY SEMIANNUAL SUMMATION OF ALL RELEASES BY QUARTER ALL AIRBORNE EFFLUENTS Unit: 1 Starting: 1-Jan-2023 Ending: 30-Jun-2023 TYPE OF EFFLUENT UNITS QUARTER 1 QUARTER 2 EST. TOT ERROR A. FISSION & ACTIVATION GASES

1. TOTAL RELEASE CURIES 3.81E-01 3.62E-01 100
2. AVERAGE RELEASE RATE FOR PERIOD uCi/sec 4.90E-02 4.61E-02
3. PERCENT OF LIMIT (9.60E+04 uCi/sec) 5.11E-05 4.80E-05 B. RADIOIODINES
1. IODINE-131 CURIES 6.20E-08 1.13E-08 25
2. AVERAGE RELEASE RATE FOR PERIOD uCi/sec 7.97E-09 1.44E-09
3. PERCENT OF LIMIT (4.00E-02 uCi/sec) 1.99E-05 3.60E-06 C. PARTICULATES
1. PARTICULATES(HALF-LIVES>8 DAYS)

CURIES 3.58E-05 1.02E-05 25

2. AVERAGE RELEASE RATE FOR PERIOD uCi/sec 4.60E-06 1.29E-06
3. PERCENT OF LIMIT (3.00E-01 uCi/sec) 1.53E-03 4.31E-04
4. GROSS ALPHA RADIOACTIVITY CURIES 0.00E+00 0.00E+00 D. TRITIUM
1. TOTAL RELEASE CURIES 1.10E+01 9.08E+00 50
2. AVERAGE RELEASE RATE FOR PERIOD uCi/sec 1.42E+00 1.15E+00
3. PERCENT OF LIMIT (1.80E+05 uCi/sec) 7.87E-04 6.42E-04 E. CARBON-14
1. TOTAL RELEASE CURIES 1.80E+00 1.82E+00 None
2. AVERAGE RELEASE RATE FOR PERIOD uCi/sec 2.31E-01 2.31E-01
3. PERCENT OF LIMIT (7.8E+03 uCi/sec) 2.96E-03 2.96E-03

RADIOACTIVE EFFLUENT RELEASE REPORT 2023 SOUTH TEXAS PROJECT Gaseous Effluents 4-4 STP NUCLEAR OPERATING COMPANY SEMIANNUAL SUMMATION OF ALL RELEASES BY QUARTER ALL AIRBORNE EFFLUENTS Unit: 1 Starting: 1-Jul-2023 Ending: 31-Dec-2023 TYPE OF EFFLUENT UNITS QUARTER 3 QUARTER 4 EST. TOT ERROR A. FISSION & ACTIVATION GASES

1. TOTAL RELEASE CURIES 4.21E-01 4.46E-01 100
2. AVERAGE RELEASE RATE FOR PERIOD uCi/sec 5.29E-02 5.61E-02
3. PERCENT OF LIMIT (9.60E+04 uCi/sec) 5.51E-05 5.85E-05 B. RADIOIODINES
1. IODINE-131 CURIES 1.63E-09 0.00E+00 25
2. AVERAGE RELEASE RATE FOR PERIOD uCi/sec 2.05E-10 0.00E+00
3. PERCENT OF LIMIT (4.00E-02 uCi/sec) 5.12E-07 0.00E+00 C. PARTICULATES
1. PARTICULATES(HALF-LIVES>8 DAYS)

CURIES 0.00E+00 0.00E+00 25

2. AVERAGE RELEASE RATE FOR PERIOD uCi/sec 0.00E+00 0.00E+00
3. PERCENT OF LIMIT (3.00E-01 uCi/sec) 0.00E+00 0.00E+00
4. GROSS ALPHA RADIOACTIVITY CURIES 0.00E+00 0.00E+00 D. TRITIUM
1. TOTAL RELEASE CURIES 7.34E+00 7.45E+00 50
2. AVERAGE RELEASE RATE FOR PERIOD uCi/sec 9.23E-01 9.37E-01
3. PERCENT OF LIMIT (1.80E+05 uCi/sec) 5.13E-04 5.21E-04 E. CARBON-14
1. TOTAL RELEASE CURIES 1.84E+00 1.84E+00 None
2. AVERAGE RELEASE RATE FOR PERIOD uCi/sec 2.31E-01 2.31E-01
3. PERCENT OF LIMIT (7.8E+03 uCi/sec) 2.97E-03 2.97E-03

RADIOACTIVE EFFLUENT RELEASE REPORT 2023 SOUTH TEXAS PROJECT Gaseous Effluents 4-6 STP NUCLEAR OPERATING COMPANY SEMIANNUAL SUMMATION OF ALL RELEASES BY QUARTER ALL AIRBORNE EFFLUENTS Unit: 2 Starting: 1-Jan-2023 Ending: 30-Jun-2023 TYPE OF EFFLUENT UNITS QUARTER 1 QUARTER 2 EST. TOT ERROR A. FISSION & ACTIVATION GASES

1. TOTAL RELEASE CURIES 8.79E+01 1.92E+02 20
2. AVERAGE RELEASE RATE FOR PERIOD uCi/sec 1.13E+01 2.45E+01
3. PERCENT OF LIMIT (9.60E+04 uCi/sec) 1.18E-02 2.55E-02 B. RADIOIODINES
1. IODINE-131 CURIES 2.57E-06 3.93E-07 25
2. AVERAGE RELEASE RATE FOR PERIOD uCi/sec 3.30E-07 5.00E-08
3. PERCENT OF LIMIT (4.00E-02 uCi/sec) 8.25E-04 1.25E-04 C. PARTICULATES
1. PARTICULATES(HALF-LIVES>8 DAYS)

CURIES 0.00E+00 9.65E-06 25

2. AVERAGE RELEASE RATE FOR PERIOD uCi/sec 0.00E+00 1.23E-06
3. PERCENT OF LIMIT (3.00E-01 uCi/sec) 0.00E+00 4.09E-04
4. GROSS ALPHA RADIOACTIVITY CURIES 0.00E+00 0.00E+00 D. TRITIUM
1. TOTAL RELEASE CURIES 6.62E+00 9.61E+00 50
2. AVERAGE RELEASE RATE FOR PERIOD uCi/sec 8.52E-01 1.22E+00
3. PERCENT OF LIMIT (1.80E+05 uCi/sec) 4.73E-04 6.79E-04 E. CARBON-14
1. TOTAL RELEASE CURIES 1.80E+00 1.82E+00 None
2. AVERAGE RELEASE RATE FOR PERIOD uCi/sec 2.31E-01 2.32E-01
3. PERCENT OF LIMIT (7.8E+03 uCi/sec) 2.97E-03 2.97E-03

RADIOACTIVE EFFLUENT RELEASE REPORT 2023 SOUTH TEXAS PROJECT Gaseous Effluents 4-8 STP NUCLEAR OPERATING COMPANY SEMIANNUAL SUMMATION OF ALL RELEASES BY QUARTER ALL AIRBORNE EFFLUENTS Unit: 2 Starting: 1-Jul-2023 Ending: 31-Dec-2023 TYPE OF EFFLUENT UNITS QUARTER 3 QUARTER 4 EST. TOT ERROR A. FISSION & ACTIVATION GASES

1. TOTAL RELEASE CURIES 2.53E+02 2.38E+02 20
2. AVERAGE RELEASE RATE FOR PERIOD uCi/sec 3.18E+01 3.00E+01
3. PERCENT OF LIMIT (9.60E+04 uCi/sec) 3.31E-02 3.12E-02 B. RADIOIODINES
1. IODINE-131 CURIES 6.41E-07 2.32E-07 25
2. AVERAGE RELEASE RATE FOR PERIOD uCi/sec 8.06E-08 2.91E-08
3. PERCENT OF LIMIT (4.00E-02 uCi/sec) 2.02E-04 7.28E-05 C. PARTICULATES
1. PARTICULATES(HALF-LIVES>8 DAYS)

CURIES 3.67E-06 5.31E-06 25

2. AVERAGE RELEASE RATE FOR PERIOD uCi/sec 4.62E-07 6.68E-07
3. PERCENT OF LIMIT (3.00E-01 uCi/sec) 1.54E-04 2.23E-04
4. GROSS ALPHA RADIOACTIVITY CURIES 0.00E+00 0.00E+00 D. TRITIUM
1. TOTAL RELEASE CURIES 5.20E+01 2.08E+01 50
2. AVERAGE RELEASE RATE FOR PERIOD uCi/sec 6.54E+00 2.62E+00
3. PERCENT OF LIMIT (1.80E+05 uCi/sec) 3.63E-03 1.46E-03 E. CARBON-14
1. TOTAL RELEASE CURIES 1.84E+00 1.84E+00 None
2. AVERAGE RELEASE RATE FOR PERIOD uCi/sec 2.31E-01 2.31E-01
3. PERCENT OF LIMIT (7.8E+03 uCi/sec) 2.97E-03 2.97E-03
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