L-2026-002, Emergency Response Data System (ERDS) Changes
| ML26030A167 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point  |
| Issue date: | 01/30/2026 |
| From: | Mack K Florida Power & Light Co |
| To: | Office of Nuclear Reactor Regulation, Document Control Desk |
| References | |
| L-2026-002 | |
| Download: ML26030A167 (0) | |
Text
January 30, 2026 L-2026-002 10 CFR 50.4 10 CFR 50 Appendix E U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D. C. 20555-0001 Re:
Turkey Point Units 3 and 4 Docket Nos. 50-250 and 50-251 Subsequent Renewed Facility Operating Licenses DPR-31 and DPR-41 Turkey Point Emergency Response Data System (EROS) Changes Pursuant to 10 CFR 50, Appendix E, VI, 3.a, "Maintaining the Emergency Response Data System," Florida Power & Light Company (FPL) is notifying the NRC of an update to the Turkey Point, Units 3 and 4, Emergency Response Data System (EROS) data point library.
Turkey Point completed a modification that replaced two Process Radiation Monitor System (PRMS) instrumentation channels in each unit. The Attachment to this letter summarizes the changes to R-19 (Steam Generator Slowdown Monitor) and R-20 (Reactor Coolant Letdown Monitor EROS data point library.
Should you have any questions regarding this submission, please contact Ms. Maribel Valdez, Fleet Licensing Manager, at 561-904-3635.
This letter contains no new regulatory commitments.
Sincerely,
~~
Ker1hAck Director, Licensing and Regulatory Affairs Florida Power & Light Company cc:
USNRC Regional Administrator, Region II Project Manager, USNRC, Turkey Point Nuclear Plant Resident Inspector, USNRC, Turkey Point Nuclear Plant Mr. Clark Eldredge, Florida Department of Health
Attachment:
Turkey Point Process Radiation Monitor System (PRMS) Component Replacements Florida Power & Light Company 9760 SW 344 St Homestead, FL 33035
L-2026-002 Attachment Page 1 of 6 Turkey Point Process Radiation Monitor System (PRMS) Component Replacements Overview:
Radiation monitors in the Primary Radiation Monitoring 'Systems (PRMS) were impacted by age degradation and obsolescence, requiring component replacement. The existing instrument channel radiation monitors (two per unit) were replaced with Mirion Technologies radiation monitors, via Engineering Change (EC) 297841. Tables 1 and 2, below, describe the components that were replaced. Table 3 describes the replacement components. Tables 4, 5, 6 and 7 are the EROS data point reference files.
Table 1: Former Steam Generator Liquid Monitor Sample Components Channel R-19 Radiation Monitor Location Name of Component Component R-3-19 Control Room Panel 3QR66 Digital Rate Meter for Steam Generator Liquid Sample Monitor RD-3-19 Sealed Well lnline with Radiation Detector for Steam Slowdown Sample Lines Generator Slowdown R-4-19 Control Room Panel 4QR66 Digital Rate Meter for Steam Generator Liquid Sample Monitor RD-4-19 Sealed Well lnline with Radiation Detector for Steam Slowdown Sample Lines Generator Slowdown Table 2: Former Reactor Coolant System (RCS) Letdown Components Channel R-20 Radiation Monitor Location Name of Component Component RM-3-20 Control Room Panel 3QR67 Remote Ratemeter Reactor Coolant Letdown RD-3-20 In Plant-Pipe and Valve Local Rate Meter for RCS Room Letdown RE-3-20 Adjacent to Letdown Line Detector for RD-3-20 Local Outside Containment Rate Meter RM-4-20 Control Room Panel 4QR66 Reactor Coolant Letdown Radiation Monitor (Ratemeter)
RD-4-20 Adjacent to Letdown Line Radiation Detector for RCS Outside of Containment Letdown
Monitor R-19 R-20 L-2026-002 Attachment Page 2 of 6 Table 3: Replacement Components by Mirion Technologies R-19 and R-20 Detector Local Ratemeter Remote Display 2" x 3" Nal(TI) Crystal LPDU3/SAS RDU3 Scintillation Detector SG/IC41 Stainless LPDU3 IC3 HV +
RDU3 Steel Ionization 1LEMO Chamber Detector
L-2026-002 Attachment Page 3 of 6 Table 4: PTN3 EROS Data Point Library Changes R-19 TP3 DATA POINT LIBRARY REFERENCE FILE Date:
01/30/2026 Reactor Unit:
TP3 Data Feeder:
N/A NRC EROS Parameter:
NL Point ID:
TP3.R19_A Plant Spec Point Desc:
Stm Gen Liquid Sample Activity Generic/Cond Desc:
SG Slowdown Radioactivity Analog/Digital:
A Engr Units/Dig States:
cpm Engr Units Conversion:
N/A Minimum Instr Range:
10 Maximum Instr Range:
1.0E7 Zero Point
Reference:
N/A Reference Point Notes:
N/A PROC or SENS:
s Number of Sensors:
1 How Processed:
N/A Sensor Locations:
Auxiliary Bldg N-S Hallway AlarmfTrip Set Points:
Determined by Radiochemist NI Detector Power Supply N/A Cut-off Power Level:
NI Detector Power Supply N/A Turn-On Power Level:
Instrument Failure Mode:
10 Temperature Compensation N/A For DP Transmitters Level Reference Leg:
N/A Unique System Desc:
Detector type - 2" x 3" Nal(TI) Scintillation Detector.
Located in the combined SG sample Line. R-19 provides for auto closure of all 3 (Unit 3) SG sample lines, all 3 blowdown flow control valves, and both (2) blowdown tank drain valves. High Alarm setpoint is determined Radiochemist based on plant conditions.
- Attachment Page 4 of 6 Table 5: PTN3 EROS Data Point Library Changes R-20 TP3 DATA POINT LIBRARY REFERENCE FILE Date:
01/30/2026 Reactor Unit:
TP3 Data Feeder:
N/A NRC EROS Parameter:
RCS LTDN RAD Point ID:
TP3.R20_A Plant Spec Point Desc:
RCS Letdown Line Activity Generic/Cond Desc:
Rad Level of the RCS Letdown Analog/Digital:
A Engr Units/Dig States:
mR/Hr Engr Units Conversion:
N/A Minimum Instr Range:
1.0 Maximum Instr Range:
1.0E7 Zero Point
Reference:
N/A Reference Point Notes:
N/A PROC or SENS:
s Number of Sensors:
1 How Processed:
N/A Sensor Locations:
RCS letdown piping upstream of HX Alarm/Trip Set Points:
Determined by a Plant Radiochemist NI Detector Power Supply N/A Cut-off Power Level:
NI Detector Power Supply N/A Turn-On Power Level:
Instrument Failure Mode:
Low Temperature Compensation N/A For DP Transmitters Level Reference Leg:
N/A Unique System Desc:
R-20 provides a high-level alarm when RCS activity exceeds a preset value. The monitor is located on the letdown line, outside of containment and upstream of the non-regenerative heat exchanger. The detector is a SG/IC41 Stainless Steel Ionization Chamber Detector.
L-2026-002 Attachment Page 5 of 6 Table 6: PTN4 EROS Data Point Library Changes R-19 TP3 DATA POINT LIBRARY REFERENCE FILE Date:
01/30/2026 Reactor Unit:
TP3 Data Feeder:
N/A NRC EROS Parameter:
NL Point ID:
TP4.R19_A Plant Spec Point Desc:
Stm Gen Liquid Sample Activity Generic/Cond Desc:
SG Slowdown Radioactivity Analog/Digital:
A Engr Units/Dig States:
cpm Engr Units Conversion:
N/A Minimum Instr Range:
10 Maximum Instr Range:
1.0E7 Zero Point
Reference:
N/A Reference Point Notes:
N/A PROC or SENS:
s Number of Sensors:
1 How Processed:
N/A Sensor Locations:
Auxiliary Bldg N-S Hallway Alarm/Trip Set Points:
Determined by Radiochemist NI Detector Power Supply N/A Cut-off Power Level:
NI Detector Power Supply N/A Turn-On Power Level:
Instrument Failure Mode:
10 Temperature Compensation N/A For DP Transmitters Level Reference Leg:
N/A Unique System Desc:
Detector type - 2" x 3" Nal(TI) Scintillation Detector.
Located in the combined SG sample Line. R-19 provides for auto closure of all 3 (Unit 3) SG sample lines, all 3 blowdown flow control valves, and both (2) blowdown tank drain valves. High Alarm setpoint is determined Radiochemist based on plant conditions.
L-2026-002 Attachment Page 6 of 6 Table 7: PTN4 EROS Data Point Library Changes R-20 TP3 DATA POINT LIBRARY REFERENCE FILE Date:
01/30/2026 Reactor Unit:
TP3 Data Feeder:
N/A NRC EROS Parameter:
RCS LTDN RAD Point ID:
TP4.R20_A Plant Spec Point Desc:
RCS Letdown Line Activity Generic/Cond Desc:
Rad Level of the RCS Letdown Analog/Digital:
A Engr Units/Dig States:
mR/Hr Engr Units Conversion:
N/A Minimum Instr Range:
1.0 Maximum Instr Range:
1.0E7 Zero Point
Reference:
N/A Reference Point Notes:
N/A PROC or SENS:
s Number of Sensors:
1 How Processed:
N/A Sensor Locations:
RCS letdown piping upstream of HX Alarm/Trip Set Points:
Determined by a Plant Radiochemist NI Detector Power Supply N/A Cut-off Power Level:
NI Detector Power Supply N/A Turn-On Power Level:
Instrument Failure Mode:
Low Temperature Compensation N/A For DP Transmitters Level Reference Leg:
N/A Unique System Desc:
R-20 provides a high-level alarm when RCS activity exceeds a preset value. The monitor is located on the letdown line, outside of containment and upstream of the non-regenerative heat exchanger. The detector is a SG/IC41 Stainless Steel Ionization Chamber Detector.