ML090120240

Request for Additional Information, Extension of Permanent Relief from ISI Requirements for Volumetric Examination of RPV Circumferential Welds

ML090120240
Person / Time
Site:	Nine Mile Point
Issue date:	01/13/2009
From:	Richard Guzman Division of Operating Reactor Licensing
To:	Polson K Nine Mile Point
Guzman R, NRR/DORL, 415-1030
References
TAC MD9704
Download: ML090120240 (3)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 January 13, 2009 Mr. Keith J. Polson Vice President Nine Mile Point Nine Mile Point Nuclear Station, LLC P.O. Box 63 Lycoming, NY 13093

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION REGARDING NINE MILE POINT NUCLEAR STATION, UNIT NO.1, EXTENSION OF PERMANENT RELIEF FROM INSERVICE INSPECTION REQUIREMENTS FOR VOLUMETRIC EXAMINATION OF REACTOR PRESSURE VESSEL (RPV) SHELL CIRCUMFERENTIAL WELDS (TAC NO. MD9704)

Dear Mr. Polson:

By letter dated September 16, 2008, Nine Mile Point Nuclear Station, LLC, submitted for Nuclear Regulatory Commission (NRC) staff review and approval, relief request 11SI-001A for Nine Mile Point Unit NO.1 (NMP1). The relief request would allow continued use of the subject alternative from the inservice inspection requirements of Section 50.55(g) of Title 10 of the Code of Federal Regulations for the volumetric examination of RPV shell circumferential welds for the NMP1 license renewal period of extended operation (Le., from August 23,2009 to August 22,2029).

The NRC staff is reviewing the submittal and has determined that additional information is needed to support its review. Enclosed is the NRC staff's request for additional information (RAI). The RAI was discussed with your staff on January 7, 2009, and it was agreed that your response would be provided within 60 days from the date of this letter.

Sincerely, Richard V. Guzman, Senior Project Manager Plant Licensing Branch 1-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-220

Enclosure:

As stated cc w/encl: Distribution via Listserv

REQUEST FOR ADDITIONAL INFORMATION NINE MILE POINT NUCLEAR STATION, UNIT NO.1 EXTENSION OF PERMANENT RELIEF FROM INSERVICE INSPECTIONS REQUIREMENTS FOR THE VOLUMETRIC EXAMINATION OF REACTOR PRESSURE VESSEL SHELL CIRCUMFERENTIAL WELDS DOCKET NO. 50-220 The Nuclear Regulatory Commission (NRC) staff is reviewing the Nine Mile Point Nuclear Station (NMPNS) submittal dated September 16, 2008. The NRC staff has determined that additional information requested below will be needed to support its review.

RAI-1. It is stated in the NMPNS submittal that the fluence projection covering the end of the facility operating license is based on the accrual of 46 effective full power years (EFPY) of exposure. However, certain passages of the NMPNS license renewal application, dated July 14, 2005, presented limiting fluence projections based on accrual of 54 EFPY of exposure. Please explain this apparent inconsistency.

RAI-2. The enclosure to the NMPNS submittal states, "The fluence values in Table 1 for 28 EFPY and 46 EFPY (from Reference 15) bound the highest fluence beltline circumferential weld ... " Please clarify this statement. How was it determined that the listed fluence values bound the highest fluence beltline circumferential weld?

What is the location that corresponds to the listed fluence value?

Enclosure

January 13, 2009 Mr. Keith J. Polson Vice President Nine Mile Point Nine Mile Point Nuclear Station, LLC P.O. Box 63 Lycoming, NY 13093

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION REGARDING NINE MILE POINT NUCLEAR STATION, UNIT NO.1, EXTENSION OF PERMANENT RELIEF FROM INSERVICE INSPECTION REQUIREMENTS FOR VOLUMETRIC EXAMINATION OF REACTOR PRESSURE VESSEL (RPV) SHELL CIRCUMFERENTIAL WELDS (TAC NO. MD9704)

Dear Mr. Polson:

By letter dated September 16, 2008, Nine Mile Point Nuclear Station, LLC, submitted for Nuclear Regulatory Commission (NRC) staff review and approval, relief request 11SI-001Afor Nine Mile Point Unit NO.1 (NMP1). The relief request would allow continued use of the subject alternative from the inservice inspection requirements of Section 50.55(g) of Title 10 of the Code of Federal Regulations for the volumetric examination of RPV shell circumferential welds for the NMP1 license renewal period of extended operation (Le., from August 23, 2009 to August 22,2029).

The !\IRC staff is reviewing the submittal and has determined that additional information is needed to support its review. Enclosed is the NRC staff's request for additional information (RAI). The RAI was discussed with your staff on January 7,2009, and it was agreed that your response would be provided within 60 days from the date of this letter.

Sincerely, IRA!

Richard V. Guzman, Senior Project Manager Plant Licensing Branch 1-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-220

Enclosure:

As stated cc w/encl: Distribution via Listserv DISTRIBUTION:

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