ML17059A199
| ML17059A199 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 02/08/1994 |
| From: | Menning J Office of Nuclear Reactor Regulation |
| To: | Sylvia B NIAGARA MOHAWK POWER CORP. |
| References | |
| GL-89-10, TAC-M87973, NUDOCS 9402140295 | |
| Download: ML17059A199 (10) | |
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Docket No. 50-410 UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-OMI February 8, f994 Hr. B. Ralph Sylvia Executive Vice President, Nuclear Niagara Mohawk Power Corporation 301 Plainfield Road
- Syracuse, New York 13212
Dear Mr. Sylvia:
SUBJECT:
GENERIC LETTER 89-10, SUPPLEMENT 5, "INACCURACY OF MOTOR-OPERATED VALVE DIAGNOSTIC EQUIPMENT" NINE MILE POINT NUCLEAR STATION, UNIT 2 (TAC NO. H87973)
On June 28, 1993, the NRC staff issued Supplement 5, "Inaccuracy of Motor-Operated Valve Diagnostic Equipment," to Generic Letter (GL) 89-10, "Safety-Related Motor-Operated Valve Testing and Surveillance," requesting nuclear power plant licensees and construction permit holders:
(1) to reexamine their motor-operated valve (HOV) programs and to identify measures taken to account for uncertainties in properly setting valve operating thrust to ensure operability and (2) to evaluate the schedule necessary to consider the new information on HOV diagnostic equipment inaccuracy and to take appropriate action in response to that information.
Within 90 days of receipt of Supplement 5 to GL 89-10, licensees were required:
(1) to notify the NRC staff of the diagnostic equipment used to confirm the proper size, or to establish settings, for safety-related HOVs and (2) to report whether they had taken actions or planned to take actions (including schedule) to address the new information on the accuracy of HOV diagnostic equipment.
The staff has reviewed the responses, and has found that, for the most part, licensees and permit holders have been actively addressing the uncertainties regarding the accuracy of MOV diagnostic equipment.
The increased inaccuracy of HOV diagnostic equipment can raise questions regarding:
(1) the adequacy of torque switch settings to provide sufficient thrust while not exceeding thrust or torque structural limits and (2) the capability of actuator motors at current settings.
In their responses, licensees and permit holders indicated that many HOVs had the potential for underthrusting or overthrusting as a result of the higher than expected inaccuracy of HOV diagnostic equipment.
Consequently, some licensees reported that MOVs have been
- retested, adjusted, or modified to resolve the concerns regarding the accuracy of MOV diagnostic equipment.
Niagara Hohawk Power Corporation (NHPC) responded to Supplement 5 for Nine Mile Point Nuclear Station, Unit 2 by letter dated September 27, 1993.
The response stated that NMPC:
(1) uses HOV diagnostic equipment manufactured by Liberty Technologies (VOTES), (2) currently uses VOTES 2.31 software, (3) had reviewed previous VOTES test results, and (4) had revised test procedures and
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Hr. B. Ralph Sylvia February 8,
1994 calculations in light of the Liberty Technologies'art 21 notice (October 2, 1992).
NMPC further stated that the ITI-HOVATS Thrust Measuring Device i" used For HOV diagnostic test'ing of quarter-turn valves.
During a future inspection, the NRC staff will evaluate NMPC's resolution of the HOV diagnostic accuracy issue.
In particular, the NRC staff will review NHPC's method for evaluating the VOTES test data and the results of that evaluation.
This completes all efforts on TAC No. H87973.
If you have any questions regarding this issue, please call me at (301) 504-1406.
Sincerely, Original signed by:
cc:
See next page
~OIITRIBIITIG Docket File NRC 5 Local PDRs PDI-1 Reading SVarga JCalvo RACapra CVogan JMenning
CCowgill, RGN-I John E. Henning, Project Manager Project Directorate I-1 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation OFF!CE HANE DATE PDI-1:LA CVo an PDI-1'PH JHennin
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Mr. B. Ralph Sylvia February 8,
1994 calculations in light of the Liberty Technologies'art 21 notice (October 2, 1992).
NMPC further stated that the ITI-MOVATS Thrust Measuring Device is used for MOV diagnostic testing of quarter-turn valves.
During a future inspection, the NRC staff will evaluate NMPC's resolution of the MOV diagnostic accuracy issue.
In particular, the NRC staff will review NMPC s method for evaluating the VOTES test data and the results-of that evaluation.
This completes all efforts on TAC No. M87973.
If you have any questions regarding this issue, please call me at (301) 504-1406.
Sincerely, cc:
See next page John E. Menning, Project Manager Project Directorate I-1 Division of Reactor Projects I/II Office of Nuclear Reactor Regulation
V
Mr. B. Ralph Sylvia Niagara Mohawk Power Corporation Nine Mile Point Nuclear Station Unit 2 CC:
Hark J. Wetterhahn, Esquire Winston 8 Strawn 1400 L Street, NW.
Washington, DC 20005-3502 Hr. Richard Goldsmith Syracuse University College. of Law E. I. White Hall Campus
- Syracuse, New York 12223 Resident Inspector Nine Mile Point Nuclear Station P.O.
Box 126
- Lycoming, New York 13093 Gary D. Wilson, Esquire Niagara Mohawk Power Corporation 300 Erie Boulevard West
- Syracuse, New York 13202 Mr. David K. Greene Manager Licensing Niagara Mohawk Power Corporation 301 Plainfield Road
- Syracuse, New York 13212 Ms.
Donna Ross New Yor k State Energy Office 2 Empire State Plaza 16th Floor
- Albany, New York 12223 Supervisor Town of Scriba Route 8, Box 382
- Oswego, New York 13126 Regional Administrator, Region I U. S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406 Charles Donaldson, Esquire Assistant Attorney General New York Department of Law 120 Broadway New York, New York 10271 Hr. Richard H. Kessel Chair and Executive Director State Consumer Protection Board 99 Washington Avenue
- Albany, New York 12210 Hr. John H. Mueller Plant Manager, Unit 2 Nine Mile Point Nuclear Station Niagara Mohawk Power Corporation P.O.
Box 32
- Lycoming, New York 13093 Vice President Nuclear Generation Nine Mile Point Nuclear Station Niagara Mohawk Power Corporation P.O.
Box 32
- Lycoming, New York 13093 Hr. Hartin J. HcCormick, Jr.
Vice President Nuclear Safety Assessment and Support Niagara Mohawk Power Corporation Nine Nile Point Nuclear Station P.O.
Box 63
- Lycoming, New Yor k 13093
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Hr. B. Ralph Sylvia February 8,
1994 calculations in light of the Liberty Technologies'art 21 notice (October 2, 1992).
NHPC further stated that the ITI-HOVATS Thrust Heasuring Device is used for HOV diagnostic testing of quarter-turn valves.
During a future inspection, the NRC staff will evaluate NHPC's resolution of the HOV diagnostic accuracy issue.
In particular, the NRC staff will review NHPC's method for evaluating the VOTES test data and the results of that evaluation.
This completes all efforts on TAC No. H87973.
If you have any questions regarding this issue, please call me at (301) 504-1406.
Sincerely, Original signed by:
cc:
See next page DISTRIBUTION:
Docket File NRC & Local PDRs PDI-1 Reading SVarga JCalvo RACapra CVogan JHenning
CCowgill, RGN-I John E. Henning, Project Hanager Project Directorate I-1 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation OFF!CE NANE DATE PDI-1:LA CVo an PDI-1: PH JHennin
. vl g
94 PDI-1: D RACa ra~
'2 8 94 OFFICIAL RECORD COPY F ILENAHE: G: iNHP2iNH287973. LTR
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