ML20056H468
| ML20056H468 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 08/27/1993 |
| From: | Menning J Office of Nuclear Reactor Regulation |
| To: | Sylvia B NIAGARA MOHAWK POWER CORP. |
| Shared Package | |
| ML20056H469 | List: |
| References | |
| TAC-M86964, NUDOCS 9309090385 | |
| Download: ML20056H468 (3) | |
Text
August 27, 1993 410 Distribution Docket File CVogan NRC & Local PDRs JMenning h Sylvia PDI-1 Reading OGC ice President, Nuclear ACRS (10) haek Power Corporation SVarga JCalve CCowgill, RI teld Road MBanic, 7D4 New York 13212 RACapra
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HIGH PRESSURE CORE SPRAY N0ZZLE SAFE-END EXTENSION WELD - NINE MIL POINT NUCLEAR STATION, UNIT 2 (TAC N0. M86964) dated July 8, 1993, Niagara Mohawk Power Corporation (NMPC)
NRC staff approval of a change to its previous approach regarding an n in the weld. joining the high pressure core spray (HPCS) nozzle safe e safe-end extei:sion. NMPC had intended to replace the safe-end However, in during the third refueling outage to remove the flaw.
he continued favorable ultrasonic inspection results and further NMPC proposed to not replace the safe-end extension as originally but rather to continue to monitor the flaw at each refueling outage.
ionic inspection shows any growth at any time, then HMPC would a weld overlay repair.
T has completed review of NMPC's proposal for continued inspection iecessary, repair of the flaw in the weld joining the HPCS nozzle safe As discussed in the enclosed Safety ae safe-end extension.
on, we have concluded that NMPC's proposal, including the weld overlay lan, is acceptable, pletes staff efforts under TAC No, M86964.
Sincerely, Original signed by:
John E. Menning, Project Menager Project Directorate I-l Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation re:
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August 27, 1993 Docket No. 50-410 Distribution Docket File CVogan Mr. B. Ralph Sylvia NRC & Local PDRs JMenning Executive Vice President, Nuclear PDI-l Reading OGC Niagara Mohawk Power Corporation SVarga ACRS (10) 301 Plainfield Road JCalvo CCowgill, RI Syracuse, New York 13212 RACapra MBanic, 7D4
Dear Mr. Sylvia:
SUBJECT:
HIGH PRESSURE CORE SPRAY N0ZZLE SAFE-END EXTENSION WE'D - NINE MILE POINT NUCLEAR STATION, UNIT 2 (TAC NO. M86964)
By letter dated July 8, 1993, Niagara Mohawk Power Corporation (NMPC) requested NRC staff approval of a change to its previous approach regarding an indication in the weld joining the high pressure core spray (HPCS) nozzle safe i
end to the safe-end extension. NMPC had intended to replace the safe-end i
extension during the third refueling outage to remove the flaw.
However, in l
view of the continued favorable ultrasonic inspection results and further analysis, NMPC proposed to not replace the safe-end extension as originally planned, but rather to continue to monitor the flaw at each refueling outage.
If ultrasonic inspection shows any growth at any time, then NMPC would implement a weld overlay repair.
l The staff has completed review of NMPC's proposal for ccntinued inspection and, if necessary, repair of the flaw in the weld joining the HPCS nonle safe end to the safe-end extension. As discussed in the enclosed Safety l
Evaluation, we have concluded that NMPC's proposal, including the weld overlay repair plan, is acceptable.
This completes staff efforts under TAC No. M86964.
Sincerely, Original signed by:
John E. Menning, Project Manager Project Directorate I-1 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation
Enclosure:
Safety Evaluation 1
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,e WASHINGTON D.C. 20555-0001 August 27, 1993 Docket No. 50-410 Mr. B. Ralph Sylvia Executive Vice President, Nuclear Niagara Mohawk Power Corporation 301 Plainfield Road Syracuse, New York 13212
Dear Mr. Sylvia:
SUBJECT:
HIGH PRESSURE CORE SPRAY N0ZZLE SAFE-END EXTENSION WELD - NINE MILE POINT NUCLEAR STATION, UNIT 2 (TAC NO. M86964)
By letter dated July 8, 1993, Niagara Mohawk Power Corporation (NMPC) requested NRC staff approval of a change to its previous approach regarding an indication in the weld joining the high pressure core spray (HPCS) nozzle safe end to the safe-end extension. NMPC had intended to replace the safe-end extension during the third refueling outage to remove the flaw. However, in view of the continued favorable ultrasonic inspection results and further analysis, NMPC proposed to not replace the safe-end extersion as originally planned, but rather to continue to monitor the flaw at each refueling outage.
If ultrasonic inspection shows any growth at any time, then NMPC would implement a weld overlay repair.
The staff has completed review of NMPC's proposal for continued inspection and, if necessary, repair of the flaw in the weld joining the HPCS nozzle safe end to the safe-rsd extension. As discussed in the enclosed Safety Evaluation, we have concluded that NMPC's proposal, including the weld overlay repair plan, is acceptable.
This completes staff efforts under TAC No. M86964.
Sincerely, E.
John E. Menni Project Manager Project Directorate I-1 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation
Enclosure:
Safety Evaluation
I Mr. B. Ralph Sylvia Nine Mile Point Nuclear Station Niagara Mohawk Power Corporation Unit 2 cc:
Mark J. Wetterhahn, Esquire Regional Administrator, Region I Winston & Strawn U. S. Nuclear Regulatory Commission 1400 L Street, NW.
475 Allendale Road Washington, DC 20005-3502 King of Prussia, PA 19406 Mr. Richard Goldsmith Charles Donaldson, Esquire Syracuse University Assistant Attorney General College of Law New York Department of Law E. I. White Hall Campus 120 Broadway Syracuse, New York 12223 New York, New York 10271 Resident Inspector Mr. Richard M. Kessel Nine Mile Point Nuclear Station Chair and Executive Director P. O. Box 126 State Consumer Protection Board Lycoming, New York 13093 99 Washington Avenue Albany, New York 12210 Gary D. Wilson, Esquire Niagara Mohawk Power Corporation Mr. John H. Mueller 300 Erie Boulevard West Plant Manager, Unit 2 Syracuse, New York 13202 Nine Mile Point Nuclear Station Niagara Mohawk Power Corporation Mr. David K. Greene P. O. Box 32 Manager Licensing Lycoming, New York 13093 Niagara Mohawk Power Corporation 301 Plainfield Road Vice President - Nuclear Generation Syracuse, New York 13212 Nine Mile Point huclear Station Niagara Mohawk Power Corporation Ms. Donna Ross P. O. Box 32 New York State Energy Office Lycoming, New York 13093 2 Empire State Plaza 16th Floor Albany, New York 12223 Supervisor Town of Scriba Route 8, Box 382 Oswego, New York 13126
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