ML071080188
| ML071080188 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 04/24/2007 |
| From: | Fields M NRC/NRR/ADRO/DORL/LPLIV |
| To: | Walsh K Entergy Operations |
| Fields M, NRR/DORL/LP4, 415-3062 | |
| References | |
| GL-06-002, TAC MD1048 | |
| Download: ML071080188 (4) | |
Text
April 24, 2007 Mr. Kevin T. Walsh Vice President of Operations Entergy Operations, Inc.
17265 River Road Killona, LA 70057-3093
SUBJECT:
WATERFORD STEAM ELECTRIC STATION, UNIT 3 - CLOSEOUT OF GENERIC LETTER 2006-02, GRID RELIABILITY AND THE IMPACT ON PLANT RISK AND THE OPERABILITY OF OFFSITE POWER (TAC NO. MD1048)
Dear Mr. Walsh:
On February 1, 2006, the U.S. Nuclear Regulatory Commission (NRC) issued GL 2006-02, Grid Reliability and the Impact on Plant Risk and the Operability of Offsite Power (Agencywide Documents Access and Management System (ADAMS) Accession No. ML060180352), to all holders of operating licenses for nuclear power reactors except those who have permanently ceased operation and have certified that fuel has been removed from the reactor vessel.
GL 2006-02 notified licensees of the NRC staffs need for information in four areas as follows:
(1) use of protocols between the nuclear power plant (NPP) and the transmission system operator (TSO), independent system operator (ISO), or reliability coordinator/authority (RC/RA) and the use of transmission load flow analysis tools (analysis tools) by TSOs to assist NPPs in monitoring grid conditions to determine the operability of offsite power systems under plant technical specifications (TSs). (The TSO, ISO, or RA/RC is responsible for preserving the reliability of the local transmission system. In this GL, the term TSO is used to denote these entities.);
(2) use of NPP/TSO protocols and analysis tools by TSOs to assist NPPs in monitoring grid conditions for consideration in maintenance risk assessments; (3) offsite power restoration procedures in accordance with Section 2 of NRC Regulatory Guide (RG) 1.155, Station Blackout; and (4) losses of offsite power caused by grid failures at a frequency equal to or greater than once in 20 site-years in accordance with RG 1.155.
Subsequent to the GL, the NRC issued a Request for Additional Information (RAI) (ADAMS Accession No. ML063380308), regarding the resolution of GL 2006-02 to 63 of 65 holders of
K. T. Walsh operating licenses for nuclear power reactors. The RAI requested that licensees respond to questions in the following areas:
(1)
Switchyard Minimum Voltage; (2)
Loss of Real-Time Contingency Analysis (RTCA) Capability; (3)
Verification of RTCA Predicted Post-Trip Voltage; (4)
Identification of Applicable Single Contingencies; (5)
Seasonal Variation in Grid Stress (reliability and Loss-of-offsite power (LOOP)
Probability; and (6)
Interface With Transmission System Operator During Extended Plant Maintenance.
By letters dated April 3, 2006, and January 31, 2007 (ADAM Accession Nos. ML060950379 and ML070330058, respectively), you responded to the information request of GL 2006-02 and the subsequent RAI. Based on the information you provided, the staff has concluded that compliance is being maintained with NRC regulatory requirements governing electric power sources and associated personnel training and considers your response to GL 2006-02 complete.
If you have any questions, please contact me 301-415-3062.
Sincerely,
/RA/
Mel B. Fields, Senior Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-382 cc: See next page
ML071080188 OFFICE NRR/LPL4/PM NRR/LPL4/LA NRR/EEEB/BC NRR/LPL4/BC NAME MFields JBurkhardt GWilson THiltz DATE 4/23/07 4/20/07 4/23/07 4/24/07
November 2006 Waterford Steam Electric Station, Unit 3 cc:
Vice President, Operations Support Entergy Operations, Inc.
P.O. Box 31995 Jackson, MS 39286-1995 Director Nuclear Safety Assurance Entergy Operations, Inc.
17265 River Road Killona, LA 70057-3093 General Manager Plant Operations Waterford 3 SES Entergy Operations, Inc.
17265 River Road Killona, LA 70057-3093 Manager, Licensing Entergy Operations, Inc.
17265 River Road Killona, LA 70057-3093 Resident Inspector/Waterford NPS P.O. Box 822 Killona, LA 70066-0751 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011 Parish President Council St. Charles Parish P.O. Box 302 Hahnville, LA 70057 Executive Vice President &
Chief Operating Officer Entergy Operations, Inc.
P.O. Box 31995 Jackson, MS 39286-1995 Director, Nuclear Safety & Licensing Entergy Operations, Inc.
1340 Echelon Parkway Jackson, MS 39213-8298 Louisiana Department of Environmental Quality Radiological Emergency Planning and Response Division P.O. Box 4312 Baton Rouge, LA 70821-4312 Louisiana Department of Environmental Quality Office of Environmental Compliance P.O. Box 4312 Baton Rouge, LA 70821-4312 Chairman Louisiana Public Services Commission P.O. Box 91154 Baton Rouge, LA 70825-1697 Richard Penrod, Senior Environmental Scientist/State Liaison Officer Office of Environmental Services Northwestern State University Russell Hall, Room 201 Natchitoches, LA 71497