ML20078J374

Application for Amend to License NPF-69,revising TS 3/4.5.1,by Reducing Leak Rate Test Pressure for Safety Related ADS Nitrogen Receiving Tanks from 385 Psig to 365 Psig

ML20078J374
Person / Time
Site:	Nine Mile Point
Issue date:	11/14/1994
From:	Mccormick M NIAGARA MOHAWK POWER CORP.
To:
Shared Package
ML20078J353	List: ML20078J348 ML20078J374 ML20078J378
References
NUDOCS 9411210177
Download: ML20078J374 (2)

Text

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UNITED STATES NUCLEAR REGULATORY COMMISSION in the Matter of 1

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NIAGARA MOHAWK POWER CORPORATION ) Docket No. 50-410

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Nine Mile Point Nuclear Station Unit 2 )

APPLICATION FOR AMENDMENT TO OPERATING LICENSE Pursuant to Section 50.90 of the Regulations of the Nuclear Regulatory Commission, <

Niagara Mohawk Power Corporation, holder of Facility Operating License No. NPF-69, hereby requests that Specification 3/4.5.1, "ECCS-OPERATING," of the Technical Specifications set forth in Appendix A to that license be amended. The proposed change has been reviewed in accordance with Section 6.5 of the Technical Specifications.

The proposed change to the Technical Specifications is set forth in Attachment A to this Application. Revision of Surveillance Requirement 4.5.1.e.2.e) would reduce the leak rate test pressure for the safety related Automatic Depressurization System (ADS) nitrogen receiving tanks from 385 psig to 365 psig. This change is needed to prevent potential degradation of the rupture disk located on each ADS nitrogen receiving tank during performance of Surveillance Requirement 4 5.1.e.2.e). In the past, testing at 385 psig has resulted in the failure of the rupture disk because of the combination of high previous operating pressures and subsequent testing. The disk failures require disk replacement and rotesting which adds to the required outage work scope. The reduction will bring the test and operating pressures in line with the manufacturer's recommended operating pressure.

The proposed change will not authorize any change in the types of effluents or in the authorized power level of the facility. Supporting information and analyses which demonstrate that the proposed change involves no significant hazards consideration pursuant to 10 CFR 50.92 are included as Attachment B.

WHEREFORE, Applicant respectfully requests that Appendix A to Facility Operating License No. NPF-69 be amended in the form attached hereto as Attachment A.

NIAGARA OHAWK POWER CORPORATION By G T) ,

2kA lr Martin J. MdCormick Jr.

Vice President - Nuclear Safety Assessment and Support Subscribed and sworn to before me on this /g day of 'dd.A)##n2ey 1994.

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ff0TARY PUBCC BEWRLY W. RlFKA otan Public Stateof New York 9411210177 941114 PDR ADOCK 05000410 Y, q 4 P PDR

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', l ATTACHMENT A ,

NIAGARA MOHAWK POWER CORPORATION I LICENSE NO. NPF-69 DOCKET NO. 50-410 Ermpg.d Chance to Technical Snecifications i

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Replace existing page 3/4 5-6 with the attached revised page. This page has been retyped '

in its entirety with a marginal marking to indicate the change to the text .

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