W3F1-2024-0040, Special Report SR 2024-001-00 Radiation Monitor Inoperable Greater than 7 Days

Special Report SR 2024-001-00 Radiation Monitor Inoperable Greater than 7 Days

ML24248A102
Person / Time
Site:	Waterford
Issue date:	09/03/2024
From:	Twarog J Entergy Operations
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
W3F1-2024-0040
Download: ML24248A102 (1)

Text

John Twarog Manager Regulatory Assurance 504-739-6747

W3F1-2024- 0040 10 CFR 50. 4

September 3, 2024

ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555- 0001

Subject:

Special Report SR 2024-001-00 Radiation Monitor Inoperable Greater Than 7 Da ys

Waterford Steam Electric Station, Unit 3 NRC Docket No. 50-382 Renewed Facility Operating License No. NPF -38

Entergy Operations, Inc. (Entergy) is submitting Special Report SR -2024-001-00 for Waterford Steam Electric Station, Unit 3 (Waterford 3). This Special Report is submitted as required by Waterford 3 Technical Specification (TS) 3.3.3.1, "Radiation Monitoring Instrumentation," which requires the minimum number of Effluent Accident Monitor channels shown in TS Table 3.3-6 to be operable. If an inoperable monitor is not restored to operable status within 7 days after the failure, a Special Report is required to be submitted in accordance with TS 6.9.2 within 14 days after the failure outlining the actions taken, the cause of the inoperability and the plans and schedule for restoring the system to OPERABLE status.

This letter contains no new com m itments.

Should you have any questions concerning this issue, please contact me at 504-739-6747.

Respectfully,

John Twarog

JRT/mrp

Entergy Operations, Inc., 1726 5 River Road, Killona, LA 70057

W3F1-2024- 0040 Page 2 of 2

Enclosure:

Waterford 3 Special R eport SR-2024-001-00

cc: NRC Region IV Regional Administrator NRC Senior Resident Inspector - Waterford Steam Electric Station, Unit 3 NRC Project Manager - Waterford Steam Electric Station, Unit 3 Louisiana Department of Environmental Quality

Enclosure

W 3 F1-2024- 0040

Special Report SR-2024- 001-00 W3F1-2024- 0040 Enclosure Page 1 of 2

SPECIAL REPORT

SR-2024-001-00

Radiation Monitor Inoperable Greater T ha n 7 Da ys

DESCRIPTION

The Waterford Steam Electric Station, Unit 3 (Waterford 3) Condenser Vacuum Pump Discharge Wide Range Gas Monitor (WRGM) (PRMI R0002) radiation monitor was declared inoperable on August 19, 2024. Operability was not restored within the required 7-day period as specified in Waterford 3 Technical Specification (TS) 3.3.3.1, "Radiation Monitoring Instrumentation," Table 3.3-6. This Special Report is submitted to the Nuclear Regulatory Commission (NRC) in accordance with TS 6.9.2, "Special Reports," and 10 CFR 50.4, "Written communications," within the 14 days of the failure outlining the actions taken, the cause of the inoperability and the plans and schedule for restoring the system to operable sta tu s.

The Condenser Vacuum Pump WRGM monitors condenser vacuum pump discharge continuously to detect steam generator tube leakage and to quantify release rate.

The operability of the subject WRGM channels ensures that: (1) the radiation levels are continually measured in the areas served by the individual channels; (2) the alarm or automatic action is initiated when the radiation level trip setpoint is exceeded; and (3) sufficient information is available on selected plant parameters to monitor and assess these variables following an accident. The radioactive gaseous effluent WRGM instrumentation is provided to monitor and control, as applicable, the releases of radioactive materials in gaseous effluents during actual or potential releases of gaseous effluents. The alarm/trip setpoints for these instruments are calculated and adjusted in accordance with the m ethodology and param eters in the Offsite Dose Calculation Manual (ODCM) to ensure that the alarm (and/or trip, if applicable) will occur prior to exceeding th e limits of Title 10 of the Code of Federal Regulations (10 CFR) Part 20.

ACTIONS TAKEN

On August 19, 2024, during Operator rounds, the Condenser WRGM Air Evacuation Radiation Monitor Dryer Discharge Temp erature was found high out of spec ification. The temperature should be less than 65F and the temperature was recorded at 102 F.

The monitor was declared inoperable, t he required actions were taken in accordance with TS 3.3.3.1, Table 3.3-6, and an entry in the Equipment Out of Service log was initiated to track the condition. The Chemistry Department established the pre-planned alternate method of monitoring as required.

Actions were taken to were taken to troubleshoot the condenser dryer skid. During investigation, it was identified that the compressor and two supporting fuses on the dryer skid had failed. The compressor was replaced, and the supporting fuses were ordered.

W3F1-2024- 0040 Enclosure Page 2 of 2

CAUSE OF INOPERABILITY

The cause of the Condenser Vacuum Pump Discharge Wide Range Gas Monitor inoperability was the compressor and failure of two supporting fuses on the dryer skid causing the sample to not be adequately cooled to less than 65 F.

PLANS AND SCHEDULE FOR RESTORING OPERABLE STATUS

The failed compressor has been replaced and t he supporting fuses are expected to be delivered within the next week. The site will install the support fuses and perform required post maintenance testing. The site expects the Condenser Vacuum Pump Discharge Wide Range Gas Monitor to return to operable status on or before September 12, 2024.