Letter Sequence Other |
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MONTHYEARML0633803172006-12-0505 December 2006
Enclosure 1 - Addressee List
Project stage: Request
ML0634604402006-12-13013 December 2006
Response Date for Request for Additional Information Regarding Resolution of Generic Letter 2006-02, Grid Reliability and the Impact on Plant Risk and the Operability of Offsite Power (TAC Nos. MD0947 Through MD1050)
Project stage: RAI
ML0703300512007-01-31031 January 2007
2 & 3; Sequoyah, Units 1 & 2 and Watts Bar, Unit 1 - Request for Additional Information Regarding Resolution of Generic Letter 2006-02, Grid Reliability and Impact on Plant Risk & Operability of Offsite Power
Project stage: Request
ML0703701932007-01-31031 January 2007
Response to Request for Additional Information Regarding Generic Letter 2006-02, Grid Reliability and the Impact on Plant Risk and the Operability of Offsite Power.
Project stage: Response to RAI
ML0710702192007-05-0808 May 2007
Response to Generic Letter 2006-02 Grid Reliability and the Impact on Plant Risk and the Operability of Offsite Power
Project stage: Other
2006-12-05
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Text
May 8, 2007 Mr. Dennis R. Madison Vice President - Hatch Edwin I. Hatch Nuclear Plant 11028 Hatch Parkway North Baxley, GA 31513
SUBJECT:
EDWIN I. HATCH NUCLEAR PLANT, UNIT NOS. 1 AND 2, RESPONSE TO GENERIC LETTER 2006-02, GRID RELIABILITY AND THE IMPACT ON PLANT RISK AND THE OPERABILITY OF OFFSITE POWER (TAC NOS.
MD0987, MD0988 )
Dear Mr. Madison:
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 RC/RA 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 operating licenses for nuclear power reactors. The RAI requested licensees to respond to questions in the following areas:
D. Madison (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 probability),
(6) Interface with transmission system operator during extended plant maintenance.
By letter(s) dated March 31, 2006, (ADAMS Accession No. ML060900618) and January 30, 2007 (ADAMS Accession No. ML070300848), 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 to be complete.
If you have any questions, please contact me at 301-415-1493.
Sincerely,
/RA/
Robert E. Martin, Senior Project Manager Plant Licensing Branch II-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-321 and 50-366 cc: See next page
ML060900618) and January 30, 2007 (ADAMS Accession No. ML070300848), 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 to be complete.
If you have any questions, please contact me at 301-415-1493.
Sincerely,
/RA/
Robert E. Martin, Senior Project Manager Plant Licensing Branch II-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-321 and 50-366 cc: See next page DISTRIBUTION:
PUBLIC LPL2-1 R/F RidsNrrPMRMartin (hard copy) RidsNrrLAMOBrien (hard copy)
RidsRgn2MailCenter (SShaeffer) RidsNrrDorlLpl2-1(EMarinos)
RidsAcrsAcnwMailCenter RidsOgcRp GWilson, NRR JRobinson, NRR ADAMS Accession No. - ML071070219 OFFICE NRR/LPL2-1/PM NRR/LPL2-1/LA NRR/EEEA/BC NRR/LPL2-1/BC NAME RMartin:nc MOBrien GWilson EMarinos DATE 05/8/07 05/7/07 05/8/07 05/8/07 Edwin I. Hatch Nuclear Plant, Units 1 & 2 cc:
Mr. Dennis R. Madison Atlanta, GA 30308-2216 Vice President - Hatch Edwin I. Hatch Nuclear Chairman 11028 Hatch Parkway North Appling County Commissioners Baxley, GA 31513 County Courthouse Baxley, GA 31513 Laurence Bergen Oglethorpe Power Corporation Mr. Jeffrey T. Gasser 2100 E. Exchange Place Executive Vice President P.O. Box 1349 Southern Nuclear Operating Company, Inc.
Tucker, GA 30085-1349 P.O. Box 1295 Birmingham, AL 35201-1295 Mr. R. D. Baker Manager - Licensing Mr. K. Rosanski Southern Nuclear Operating Company, Inc. Resident Manager P.O. Box 1295 Oglethorpe Power Corporation Birmingham, AL 35201-1295 Edwin I. Hatch Nuclear Plant P.O. Box 2010 Resident Inspector Baxley, GA 31515 Plant Hatch 11030 Hatch Parkway N.
Baxley, GA 31531 Harold Reheis, Director Department of Natural Resources 205 Butler Street, SE., Suite 1252 Atlanta, GA 30334 Steven M. Jackson Senior Engineer - Power Supply Municipal Electric Authority of Georgia 1470 Riveredge Parkway, NW Atlanta, GA 30328-4684 Mr. Reece McAlister Executive Secretary Georgia Public Service Commission 244 Washington St., SW Atlanta, GA 30334 Arthur H. Domby, Esq.
Troutman Sanders Nations Bank Plaza 600 Peachtree St, NE, Suite 5200
