ML17056A970
| ML17056A970 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 09/05/1990 |
| From: | Martin R Office of Nuclear Reactor Regulation |
| To: | Burkhardt L NIAGARA MOHAWK POWER CORP. |
| References | |
| TAC-61715, NUDOCS 9009110247 | |
| Download: ML17056A970 (6) | |
Text
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Docket No. 50-220 UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 September 5,
1990 Mr. Lawrence Burkhardt III Executive Vice President, Nuclear Operations Niagara Mohawk Power Corporation 301 Plainfield Road
- Syracuse, New York 13212
Dear Mr Burkhardt:
SUBJECT:
RE(VEST FOR ADDITIONAL INFORMATION ON CONTAINMENT VENT/PURGE ISOLATION VALVES FOR NINE MILE POINT UNIT NO.
1 - MPA 8-24 (TAC NO. 61715)
By letter dated March 19, 1984, the staff forwarded to Niagara Mohawk Power Corporation (NMPC) the Safety Evaluation (SE) which reported resolution of the containment systems aspects of Multi Plant Action (HPA) B-24 for Nine Mile Point Unit No.
1 (NMP-1) pending the resolution of two items:
Item I involved maximum valve closure times for containment vent and purge valves.
The staff accepted by letter dated July 24, 1984, NMPC's confirmation that total closure time for the air-operated containment vent and purge isolation valves would be 15 seconds or less.
By letter dated April ll, 1990, NMPC indicated that the modification would be performed prior to the July 29, 1990, startup.
NMPC confirmed by telecon on August 23, 1990, that the modification had been performed prior to star tup.
NMPC should promptly submit the associated changes to the Technical Specifications.
Item 2 stated that: (a) a leak test should be performed to demonstrate that purge isolation valve seal material had not deteriorated; (b) the leak testing should be performed every three months or within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> of each usage of the purge/vent system (for operating conditions above cold shutdown) with a maximum interval of six months between leak tests.
The reponse to item 2 in NHPC's letter of May 30, 1984, stated that the current requirements for testing purge isolation valves seemed sufficient and provided the basis for their response.
The staff believes that NHPC may be able to support its position in view of the fact that data provided by several other nuclear plant licensees has not shown inadequate performance of the resilient seal material.
However, in order to close this issue for NHP-I, we request that NHPC forward to us the following information for all the containment purge/vent isolation valves for, at a minimum, the time period equal to the service life of the seal material:
9009i10247 900905 PDR ADOCK 05000220 P
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Mr. Lawrence Burkhardt III 1.
Maintenance data 2.
Leak rate test data (Repairs made on sealing surfaces should be included in the test data) 3.
Service life of seal material relative to replacement The reporting and/or recordkeeping requirements of this letter affect fewer than ten respondents; therefore OMB clearance is not required under PL 96-511.
Sincerely,
.ORIGINAL SIGNED BY cc:
See next page Distribution:.
NRC/Leal PDRs PDI-1 Rdg SVarga RWessman RACapra CVogan RStransly CMcCracken Robert E. Martin, Senior Project Manager Project Directorate I-1 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation RMartin DOudinot OGC EJordan JLinville ACRS (10)
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O Hr ~ L. Burkhardt III
'iagara,Mohawk Power Corporation Nine Nile lit Nuclear Station, Unit No.
1 CC:
Hr. Mark J. Wetterhahn, Esquire
- Bishop, Cook, Purcell 8 Reynolds
'1400 L. Street, N.W.
Washington, D. C.
20005-3502 Supervisor Town of Scriba R. D. 84
- Oswego, New York 13126 Mr. James L. Willis General Supt.-Nuclear Generation Niagara Mohawk Power Corporation Nine Mile Point Nuclear Station Post Office Box 32
- Lycoming, New York 13093 Resident Inspector U. S. Nuclear Regulatory Commission Post Office Box 126
- Lycoming, New York 13093 Mre Gary D. Wilson, Esquire Niagara Mohawk Power Corporation 300 Erie Boulevard West
- Syracuse, New York 13202 Regional Administrator, Region I U. S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, Pennsylvania 19406 Ms. Donna Ross New York State Energy Office 2 Empire State Plaza 16th Floor
- Albany, New York 12223 Hr. Kim Dahlberg Unit 1 Station Superintendent Nine Mile Point Nuclear Station Post Office Box 32
- Lycoming, New York 13093 Hr. Peter E. Francisco, Licensing Niagara Mohawk Power Corporation 301 Plainfield Road
- Syracuse, New York 13212 Charlie Donaldson, Esquir e Assistant Attorney General New Yor k Department of Law 120 Broadway-New York, New York 10271 Hr. Paul D. Eddy State of New York Department of Public Service Power Division, System Operations 3 Empire State Plaza
- Albany, New York 12223
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