ML23060A386
| ML23060A386 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 03/01/2023 |
| From: | Standley B Dominion Energy Nuclear Connecticut |
| To: | Office of Nuclear Reactor Regulation, Document Control Desk |
| References | |
| 23-069 | |
| Download: ML23060A386 (1) | |
Text
Dominion Energy Nuclear Connecticut, Inc.
5000 Dominion Boulevard, Glen Allen, VA 23060 DominionEnergy.com ATTN: Document Control Desk March 1, 2023 U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 DOMINION ENERGY NUCLEAR CONNECTICUT, INC.
MILLSTONE POWER STATION UNIT 2 EMERGENCY RESPONSE DATA SYSTEM (EROS)
DATA POINT LIBRARY CHANGES Serial No.:
23-069 NRA/SS:
RO Docket Nos.:
50-336 License Nos.:
DPR-65 Pursuant to 10 CFR 50, Appendix E, Section VI, Paragraph 3.a, this letter provides notification to the Nuclear Regulatory Commission (NRC) of a change to an existing data point within the Emergency Response Data System (EROS) Data Point Library Reference File for Millstone Power Station Unit 2 (MPS2). Paragraph 3.a of 10 CFR 50, Appendix E, Section VI requires NRC notification within 30 days after data point changes are completed.
As the subject change was implemented on February 17, 2023, this notification is being submitted in accordance with the 30-day requirement.
A Design Change was implemented at MPS2 to consolidate two instruments, which had previously provided clean and aerated waste radiation monitoring functions individually, into a single instrument that provides both functions. The attachment summarizes the preceding EROS data point, the new EROS data point, and the corresponding library reference file.
If you have any questions or require additional information, please contact Shayan Sinha at (804) 273-4687.
Sincerely, B. E. Standley Director - Nuclear Regulatory Affairs
Commitments made by this letter: None Serial No.: 23-069 Docket Nos.: 50-336 Page 2 of 2
Attachment:
Emergency Response Data System (EROS), Data Point Library Changes cc:
Regional Administrator, Region I U.S. Nuclear Regulatory Commission 475 Allendale Road, Suite 102 King of Prussia, Pennsylvania 19406-1415 Richard. V. Guzman NRC Senior Project Manager U. S. Nuclear Regulatory Commission One White Flint North Mail Stop 08 C2 11555 Rockville Pike Rockville, Maryland 20852-2738 NRC Senior Resident Inspector Millstone Power Station
Serial No.: 23-069 Docket Nos.: 50-336 ATTACHMENT Emergency Response Data System (ERDS)
Data Point Library Changes DOMINION ENERGY NUCLEAR CONNECTICUT, INC.
MILLSTONE POWER STATION UNIT 2
Serial No.: 23-069 Docket Nos.: 50-336 Attachment, Page 1 of 2 Millstone Power Station Unit 2 (MPS2) Emergency Response Data System (ERDS)
Data Point Library (DPL) Change Summary Preceding ERDS Points MS2 Point ID Plant Spec Point Description R9049 CLEAN WASTE DISCHARGE R9116 AERATED WASTE DISCHARGE Deleted ERDS Point MS2 Point ID Plant Spec Point Description R9116 AERATED WASTE DISCHARGE Modified ERDS Point MS2 Point ID Plant Spec Point Description R9049 AERATED/CLEAN WASTE DISCHARGE
Serial No.: 23-069 Docket Nos.: 50-336 Attachment, Page 2 of 2 MPS2 ERDS DPL Reference File Date:
2/17/2023 Reactor Unit:
MS2 Data Feeder:
N/A NRC ERDS Parameter:
EFF LIQ RAD Point ID:
R9049 Plant Spec Point Desc.:
AERATED/CLEAN WASTE DISCHARGE Generic/Cond Desc.:
Radioactivity of Released Liquids Analog/Digital:
A Engr Units/Dig States:
KCPM Engr Units Conversion:
10(1.25*Volts - 3.25) where Volts = 1-5 Minimum Instr Range:
E-2 Maximum Instr Range:
E+3 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 Building Alarm/Trip Set Points:
Variable NI Detector Power Supply Cut-off Power Level:
N/A NI Detector Power Supply Turn-on Power Level:
N/A Instrument Failure Mode:
Low Temperature Compensation for DP Transmitters:
N Level Reference Leg:
N/A Unique System Desc.:
Monitor is automatically isolated upon high alarm. Reading would remain high despite isolation. Monitor is off-scale high before any release of significant dose. Conversion to meaningful µci/sec depends largely on background (varies), flow rate and nuclide mix.