ML17059A440
| ML17059A440 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 09/06/1994 |
| From: | Brinkman D Office of Nuclear Reactor Regulation |
| To: | Sylvia B NIAGARA MOHAWK POWER CORP. |
| References | |
| GL-89-10, TAC-M86321, NUDOCS 9409090012 | |
| Download: ML17059A440 (8) | |
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 September 6,
1994 Hr. B. Ralph Sylvia Executive Vice President, Nuclear Niagara Hohawk-Power Corporation Nine Nile Point Nuclear Station P.O.
Box 63
- Lycoming, NY 13093
SUBJECT:
SCHEDULE EXTENSION.FOR IHPLEHENTATION OF GENERIC LETTER (GL) 89-10 PROGRAH FOR HOTOR OPERATED VALVES AT NINE NILE POINT NUCLEAR STATION, UNIT 2 (NHP-2)
(TAC NO. H86321)
Dear Hr. Sylvia:
By letter dated June 24, 1994, Niagara Hohawk Power Corporation (NHPC) informed the NRC that NHPC was in agreement with the GL 89-10 program extension and conditions described in our letter dated August 26,
- 1993, subject to certain clarifications.
Our August 26, 1993, letter agreed to an extension of the implementation schedule of GL 89-10 at NHP-2 until 3 months; following the end of the fourth refueling outage (currently scheduled to begin in Hay 1995). subject to the conditions specified in our August 26,
- 1993, letter.
NHPC's June 24, 1994, letter provided the following clarifications to the provisions of our acceptance of the extension of the implementation schedule of GL 89-10:
1.
The evaluation of diagnostic testing performed at partial design-basis conditions includes an analysis of measured valve performance against design-basis criteria.
As-left torque switch settings will be evaluated for acceptability at design-basis conditions with respect to measured actuator thrust/torque and other performance characteristics measured under partial design-basis conditions, as documented in Nine Nile Point Unit 2 Hotor-Operated Valve Sizing Calculations.
2.
NNPC considers plant-specific test data to be the best available data.
NNPC design-basis assumptions will be verified to be conservative by comparing the capability of valves which are only statically tested with similar valves in the same group that have been tested under dynamic conditions.
The predicted thrust margins on those, valves which will only be statically tested are conservative with respect to plant-specific testing to date.
3.
All gate valves have been statically tested.
The majority of globe and quarter-turn valves have been statically tested with the remaining six (6) valves scheduled to be 'statically tested in Refueling Outage 4.
NNPC conservatively assessed the capability of each valve not statically or dynamically tested prior to June 28, 1994, to achieve necessary thrust/torque requirements.
The 9409090012 940906 PDR ADOCK'5000410 P
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B. Sylvia September 6,
1994 justification of a conservative assessment of operability for these valves is documented in Motor-Operated Valve Sizing Calculations and in Nine Mile Point Unit 2's Operability Assessments for Motor-Operated Valves in the Scope of Program Extension.
4.
Grouping methodology being implemented at Nine Mile Point Unit 2 is validated through continued evaluation of "plant-specific" test data to the groupings established, and in meeting the grouping considerations of Supplement 6 to Generic Letter 89-10.
Justifications involving the application of specific dynamic test data to all valves within groupings will be documented as Nine Mile Point Unit 2 plant-specific testing is completed.
The documentation associated with valve testing conducted during Refueling Outage 4
will be completed within three months following the outage.
The NRC staff has reviewed NHPC's June 24, 1994, letter clarifying your justification for an extension of the implementation schedule of GL 89-10 at NMP-2 until 3 months following the end of the fourth refueling outage subject to the conditions specified in our August 26, 1993, letter.
We agree that the above clarifications to the conditions specified in our August 26,
- 1993, letter are reasonable and are therefore acceptable to us.
Please inform the NRC in writing when the requirements of GL 89-10 have been implemented at NMP-2.
Sincerely, Docket No. 50-410 cc:
See next page Donald S. Brinkman, Senior Project Manager Project Directorate I-l Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation
P
B. Ralph Sylvia Niagara Mohawk Power Corporation Nine Mile Point Nuclear Station Unit.2 CC:
Mark J. Wetterhahn, Esquire Winston 5 Strawn 1400 L Street, NW.
Washington, DC 20005-3502 Mr. Richard Goldsmith Syracuse University College of Law E. I. White Hall Campus
- Syracuse, NY 12223 Resident Inspector Nine Mile Point Nuclear Station P.O.
Box 126
- Lycoming, NY 13093 Gary D. Wilson, Esquire Niagara Hohawk Power Corporation 300 Erie Boulevard West
- Syracuse, NY 13202 Hr. David K. Greene Manager Licensing Niagara Mohawk Power Corporation Nine Mile Point Nuclear Station P.O.
Box 63
- Lycoming, NY 13093 Ms.
Donna Ross New York State Energy Office 2 Empire State Plaza 16th Floor
- Albany, NY 12223 Supervisor Town of Scriba Route 8, Box 382
- Oswego, NY 13126 Regional Administrator, Region I U. S. Nuclear Regulatory Commission'75 Allendale Road King of Prussia, PA 19406 Charles Donaldson, Esquire Assistant Attorney General New York Department of Law 120 Broadway New York, NY 10271 Hr. Richard M. Kessel Chair and Executive 'Director State Consumer Protection Board 99 Washington Avenue
- Albany, NY 12210 Hr. Kim A. Dahlberg Plant Manager, Unit 2 Nine Mile Point Nuclear Station Niagara Mohawk Power Corporation P.O.
Box 63
- Lycoming, NY 13093 Hr. Louis F. Storz Vice President Nuclear Generation Niagara Mohawk Power Corporation Nine Mile Point Nuclear Station P.O.
Box 63
- Lycoming, NY 13093 Mr. Hartin J.
McCormick, Jr.
Vice President Nuclear Safety Assessment and Support Niagara Mohawk Power Corporation Nine Mile Point Nuclear Station P.O.
Box 63
- Lycoming, NY 13093
I
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r B. Sylvia September 6,
1994 justification of a conservative assessment of operability for these valves is documented in Hotor-Operated Valve Sizing Calculations and in Nine Mile Point Unit 2 s Operability Assessments for Hotor-Operated Valves in the Scope of Program Extension.
4.
Grouping methodology being implemented at Nine Mile Point Unit 2 is validated through continued evaluation of "plant-specific" test data to the groupings established, and in meeting the grouping considerations of Supplement 6 to Generic Letter 89-10.
Justifications involving the application of specific dynamic test data to all valves within groupings will be documented as Nine Nile Point Unit 2 plant-specific testing is completed.
The documentation associated with valve testing conducted during Refueling Outage 4
will be completed within three months following the outage.
The NRC staff has reviewed NHPC's June 24, 1994, letter clarifying your justification for an extension of the implementation schedule of GL 89-10 at NHP-2 until 3 months following the end of the fourth refueling outage subject to the conditions specified in our August 26, 1993, letter.
We agree that the above clarifications to the conditions specified in our August 26,
- 1993, letter are reasonable and are therefore acceptable to us.
Please inform the NRC in writing when the requirements of GL 89-10 have been implemented at NMP-2.
Sincerely,
~glglgPJ. SQNEO BYC Donald S. Brinkman, Senior Project Manager Project Directorate I-l Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation Docket No. 50-410 cc:
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