ML17059C588
| ML17059C588 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 03/10/1999 |
| From: | Hood D NRC (Affiliation Not Assigned) |
| To: | Mueller J NIAGARA MOHAWK POWER CORP. |
| References | |
| TAC-MA3895, NUDOCS 9903120324 | |
| Download: ML17059C588 (12) | |
Text
Mr. John H. Mueller Chief Nuclear Officer Niagara Mohawk Power Corporation Nine Mile Point Nuclear Station Operations Building, Second Floor P.O. Box 63 Lycoming, NY 13093 parch 10, 1999
SUBJECT:
REQUEST FOR ADDITIONALINFORMATION REGARDING PROPOSED AMENDMENTON SERVICE WATER SYSTEM, NINE MILEPOINT NUCLEAR STATION, UNIT NO. 2 (TAC NO. MA3895)
Dear Mr. Mueller:
By letter dated October 16, 1998, Niagara Mohawk Power Corporation (NMPC) requested a
license amendment to change the Technical Specifications regarding the Service Water System at Nine Mile Point Nuclear Station, Unit 2. We are reviewing your request and find that additional information, identified in the enclosure, is needed.
The schedule for responding to this letter was discussed with Mr. S. Leonard of your organization.
Based upon that discussion, a mutually agreeable response date is May 10, 1999.
Ifyou have questions regarding this letter or are unable to meet this response schedule, please contact me by phone on (301) 415-3049 or by electronic mail at dsh@nrc.gov.
Sincerely, Original signed by:
Darl S. Hood, Senior Project Manager Project Directorate l-1 Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-410
Enclosure:
Request for Additional Information ccw/encl: See next page DISTRIBUTION:
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Mr. John H. Mueller Chief Nuclear Officer Niagara Mohawk Power Corporation Nine Mile Point Nuclear Station Operations Building, Second Floor P.O. Box 63 Lycoming, NY 13093 March 10, 1999
SUBJECT:
REQUEST FOR ADDITIONALINFORMATION REGARDING PROPOSED AMENDMENTON SERVICE WATER SYSTEM, NINE MILEPOINT NUCLEAR STATION, UNIT NO. 2 (TAC NO. MA3895)
Dear Mr. Mueller.
By letter dated October 16, 1998, Niagara Mohawk Power Corporation (NMPC) requested a
license amendment to change the Technical Specifications regarding the Service Water System at Nine Mile Point Nuclear Station, Unit 2. We are reviewing your request and find that additional information, identified in the enclosure, is needed.
The schedule for responding to this letter was discussed with Mr. S. Leonard of your organization.
Based upon that discussion, a mutually agreeable response date is May 10, 1999.
Ifyou have questions regarding this letter or are unable to meet this response schedule, please contact me by phone on (301) 415-3049 or by electronic mail at dsh@nrc.gov.
Sincerely, Original signed by:
Darl S. Hood, Senior Project Manager Project Directorate l-1 Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-410
Enclosure:
Request for Additional Information ccw/encl: See next page DISTRIBUTION:
Docket File SBajwa PUBLIC SLittle PDI-1 R/F DHood OGC ACRS S. Barber, Rl DShum SAthavale GHubbard JZwolinski/S Black DOCUMENT NAME: G:WMP2>RAIA3895.WPD To receive a copy of this document, indicate in the box: "C" = Copy without attachment/enclosure "E" = Copy with attachment/enclosure "N"= No co OFFICE PN:PDI 1
IIANE DHood/Icc DATE 03/
/99 E
LA:PDI-BLItt 03/
/99 D:PDI-1 SBa>wa 03/
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 March 10, 1999 Mr. John H. Mueller.
Chief Nuclear Officer Niagara Mohawk Power Corporation Nine Mile Point Nuclear Station Operations Building, Second Floor P.O. Box 63 Lycoming, NY 13093
SUBJECT:
REQUEST FOR ADDITIONALINFORMATION REGARDING PROPOSED AMENDMENTON SERVICE WATER SYSTEM, NINE MILE POINT NUCLEAR STATION, UNIT NO. 2 (TAC NO. MA3895)
Dear Mr. Mueller:
By letter dated October 16, 1998, Niagara Mohawk Power Corporation (NMPC) requested a
license amendment to change the Technical Specifications regarding the Service Water System at Nine Mile Point Nuclear Station, Unit 2. We are reviewing your request and find that additional information, identified in the enclosure, is needed.
The schedule for responding to this letter was discussed with Mr. S. Leonard of your organization.
Based upon that discussion, a mutually agreeable response date is May 10, 1999.
Ifyou have questions regarding this letter or are unable to meet this response schedule, please contact me by phone on (301) 415-3049 or by electronic mail at dsh@nrc.gov.
Sincerely, g<Xi~
Darl S. Hood, Senior Project Manager Project Directorate I-1 Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-410
Enclosure:
Request for Additional Information ccw/encl: See next page
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John H. Mueller Niagara Mohawk Power Corporation Nine Mile Point Nuclear Station Unit No. 2 CC:
Regional Administrator, Region I
U. S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406'esident Inspector Nine Mile Point Nuclear Station P.O. Box 126 Lycoming, NY 13093 Mr. Jim Rettberg NY State Electric L Gas Corporation Corporate Drive Kirkwood Industrial Park P.O. Box 5224 Binghamton, NY 13902-5224 Mr. John V. Vinquist, MATS Inc.
P.O. Box 63 Lycoming, NY 13093 Supervisor Town of Scriba Route 8, Box 382 Oswego, NY 13126 Mr. Richard Goldsmith Syracuse University College of Law E.l. White Hall Campus
- Syracuse, NY 12223 Charles Donaldson, Esquire Assistant Attorney General New York Department of Law 120 Broadway New York, NY 10271 Mr. Timothy S. Carey Chair and Executive Director State Consumer Protection Board 5 Empire State Plaza, Suite 2101 Albany, NY 12223 Mark J. Wetterhahn, Esquire Winston 8 Strawn 1400 L Street, NW.
Washington, DC 20005-3502 Gary D. Wilson, Esquire Niagara Mohawk Power Corporation.
300 Erie Boulevard West
- Syracuse, NY 13202 Mr. F. WilliamValentino, President New York State Energy, Research, and Development Authority Corporate Plaza West 286 Washington Avenue Extension Albany, NY 12203-6399
~,
RE VEST FOR ADDITIONALINFORMATION REGARDING'PROPOSED TECHNICALSPECIFICATION CHANGE FOR SERVICE WATER SYSTEM NIAGARAMOHAWKPOWER CORPORATION NINE MILE POINT NUCLEAR STATION UNIT NO. 2 DOCKET NO. 50-410 Please provide the following additional information regarding your application for license amendment, dated October 16, 1998, to change the Technical Specifications (TSs) on the Service Water System (SWS) at Nine Mile Point Nuclear Station, Unit No.'2 (NMP2):
Plant S stems Branch 1.
Currently, TS Section 3.7.1.2 requires two independent SWS loops, each with two pumps, to be operable, and one loop to be in operation, for Modes 4 and 5. You state that the heat load during Modes 4 or 5 can vary significantly with time after shutdown.
As a result, the number of SWS pumps required to be operable or in operation can vary. Therefore, you propose to revise the TS to require only those portions of the SWS needed to support equipment to be operable dunng Modes 4 or 5. With required portions of the SWS inoperable, the associated equipment would be declared inoperable and action statements required by the applicable specification would be followed.
The NRC staff finds the proposed TS for the SWS for Modes 4 and 5 to be somewhat ambiguous and subject to various interpretations.
Please clarify how the proposed TS would be applied by describing the methods (e.g., administrative controls and/or procedures) that would be used to ensure compliance with the proposed TS. Discuss how heat loads during shutdown would be determined and how the required equipment would be identified.
Also, identify how required actions would be controlled when required equipment is inoperable.
Instrumentation and Controls Branch.
2.
In TS Section 3/4.7.1, you propose to revise LCO 3.7.1.1, including its associated action and surveillance requirements, to change the Analytical Limit(AL)for the SWS supply header discharge water temperature from 81 'F to 82 'F.
You state that (1) the essential components cooled by the SWS are designed for a maximum inlet temperature of 82 'F; (2) the current TS limitis 81 'F; (3) the one degree difference accounts for uncertainty of the measuring instrumentation loop; (4) the proposed change to use an ALof 82 F willmake this TS consistent with other NMP2 TS; and (5) the SWS supply header discharge water temperature surveillance procedures include appropriate allowances to reflect measurement uncertainty.
Provide the following additional information:
Enclosure
I t
tA0 Regarding your statement that the one degree difference in temperature accounts for the uncertainty of the measuring instrumentation loop, is this one degree an assumption or a value calculated using error-components of devices of the temperature instrument loop'? Please provide details.
To prevent the SWS header discharge water temperature from exceeding 82
'F, the surveillance test measured temperature should be sufficiently low to provide appropriate allowances for measurement uncertainty.
Provide a copy of your calculation to determine such allowances and the value of the acceptable measured temperature during a surveillance test. Alternatively, explain your in-house setpoint calculation methodology and confirm that the methodology used for uncertainty calculations was based upon guidance provide'd in the ISA 67- 04, 1982 standard as endorsed by Regulatory Guide 1.105, Revision 2.
3.
In TS Table 3.3.9-1, "Plant Systems Actuation Instrumentation," you propose to change LCO 3.7.1.1, including its associated action and surveillance requirements, to require the intake heaters of the Deicing Heater System to be placed in service once the Lake Ontario water temperature reaches 38 F.
You state that the deicing heaters are designed to minimize ice formation on the Ultimate Heat Sink system and that specifications for the intake deicing ensure that adequate intake flowarea is available for the SWS. TS Table 3.3.9-2, "Plant Systems Actuation Instrumentation Setpoints," currently specifies a setpoint for actuating deicing heaters at a lake temperature
~ 39 F, which is well above freezing. The TS allowable value is z 38
'F and the ALfor this parameter is 34 'F, thus, the proposed change is consistent with the Allowable Value. Operability of the deicing heater system is based upon separate instrumentation that operates in parallel with the instrumentation that automatically actuates the deicing heaters. You further state that since the uncertainty associated with the instrumentation used to determine operability is lower than the instrumentation that actually switches the heaters, you believe adequate margin exists for reducing the limiting temperature to establish heater operability from 39 'F to 38 'F.
Please provide the following additional information regarding these aspects of the proposed change.
Provide a copy of the related calculation.
Alternatively, explain your in-house setpoint calculation methodology and confirm that the methodology used for uncertainty calculations was based 'upon the guidance of the ISA 67- 04, 1982 standard as endorsed by Regulatory Guide 1.105, Revision 2.
b.
Explain how the operability of the "deicing heater actuation temperature loop" is verified using separate temperature instruments that are neither connected to the heater nor part of the deicing heater actuation temperature loop.
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