ML15261A597

NRR E-mail Capture - Cooper - 10 CFR 50.55a Relief Request (RR) for Fifth 10-Year ISI Interval, RR RI5-01, Reactor Pressure Vessel Circumferential Shell Welds Using BWRVIP-05

ML15261A597
Person / Time
Site:	Cooper
Issue date:	09/18/2015
From:	Siva Lingam Plant Licensing Branch IV
To:	Shaw J Nebraska Public Power District (NPPD)
References
TAC MF6337
Download: ML15261A597 (3)

Text

NRR-PMDAPEm Resource From: Lingam, Siva Sent: Friday, September 18, 2015 7:04 AM To: 'jdshaw@nppd.com' Cc: Markley, Michael; McHale, John; Stevens, Gary; Regner, Lisa; Burkhardt, Janet

Subject:

Cooper - 10 CFR 50.55a Relief Request (RR) for Fifth 10-Year ISI Interval, RR RI5-01, Reactor Pressure Vessel Circumferential Shell Welds Using BWRVIP-05 (TAC No. MF6337)

The U.S. Nuclear Regulatory Commission (NRC) staff has reviewed the Nebraska Public Power District (NPPD, the licensee) relief request (RR) RI5-01 dated June 9, 2015 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML15167A066), and has determined that request for additional information (RAI) is necessary. Please provide a response to the following official RAI within 30 days from the date of this e-mail. Please note that draft RAI was transmitted to you via e-mail on September 9, 2015, and you did not request for any clarification call.

RAI 1

The licensees June 9, 2015 RR for the Cooper reactor pressure vessel (RPV) circumferential and axial welds duplicates the content of Tables 4.2-6 and 4.2-7 of the Cooper License Renewal Application (LRA) for 54 effective full power years (EFPY) of operation. However, in reviewing other Cooper submittals, the NRC staff has noted some changes in fluence for the RPV since the time of the Cooper LRA. Specifically, the staff reviewed adjusted reference temperature (ART) calculations, which are based on fluence, from the following four documents:

• The Cooper LRA (ADAMS Accession No. ML083030239).

• License Amendment Request (LAR), NLS2011015 dated September 22, 2011, to revise the Cooper Technical Specifications pressure-temperature (P-T) limit curves and surveillance requirements (ADAMS Accession No. ML11272A057).

• Response to NRC RAIs, NLS2012023 dated March 30, 2012, regarding the September 22, 2011 LAR (ADAMS Accession No. ML12094A118).

• LAR, NLS2015073 dated August 6, 2015, to revise the Cooper Technical Specifications to relocate the P-T limit curves to a Pressure and Temperature Limits Report (ADAMS Accession No. ML15229A032).

The results of the staffs review of the ART calculations from these four documents are summarized in Table 1.

Provide the following:

a. Confirm whether the RPV fluence for Cooper was recalculated and increased since the time of the Cooper LRA.

b. If the RPV fluence was recalculated since the time of the Cooper LRA, explain why, and identify if there were any changes made to the methods used to calculate fluence.

c. If the RPV fluence was recalculated since the time of the Cooper LRA, provide appropriate revisions to the assessments of the Cooper RPV circumferential and axial welds that are contained in Tables 1 and 2 of the June 9, 2015 RR.

Table 1 Comparison of Adjusted Reference Temperatures for the Cooper Limiting Beltline Material (Lower Intermediate Shell Plate, Heat No. C2307-2) 1

ART for 32 ART for 54 Reference Document EFPY (°F) EFPY (°F)

[Document [Document page no.] page no.]

Table 4.2-2 of Cooper LRA Not reported. 123.5 All values in Tables 1 and 2 of (ADAMS Accession No. ML083030239) Tables 4.2-6 an

[p. 4.2-4]

NLS2011015 LAR dated 9/22/2011 105.8 131.2 The ART for 54 EFPY increa (ADAMS Accession No. ML11272A057) increased. Page 5 of the Enclo

[p. A-2 of [p. A-4 of a 2% power uprate* t Enclosure] Enclosure]

NLS2012023 Response to RAI dated 3/30/2012 105.8 Not reported. The ART for 32 EFPY confirm (ADAMS Accession No. ML12094A118)

[p. 2]

NLS2015073 LAR dated 8/6/2015 105.8 Not reported. The ART for 32 EFPY confirm (ADAMS Accession No. ML15229A031)

[p. 26 of Enclosure 2]

• Section 1.0, page 2 of the 9/22/2011 LAR indicates fluence values for Cooper were recalculated: The revised fluence includes the 1.62% Appendix K power uprate previously approved and 24-Month Cycle considerations.

Siva P. Lingam U.S. Nuclear Regulatory Commission Project Manager (NRR/DORL/LPL4-1)

Cooper Nuclear Station Diablo Canyon Nuclear Power Plant Location: O8-D5; Mail Stop: O8-B3 Telephone: 301-415-1564; Fax: 301-415-1222 E-mail address: siva.lingam@nrc.gov 2

Hearing Identifier: NRR_PMDA Email Number: 2391 Mail Envelope Properties (Siva.Lingam@nrc.gov20150918070300)

Subject:

Cooper - 10 CFR 50.55a Relief Request (RR) for Fifth 10-Year ISI Interval, RR RI5-01, Reactor Pressure Vessel Circumferential Shell Welds Using BWRVIP-05 (TAC No. MF6337)

Sent Date: 9/18/2015 7:03:56 AM Received Date: 9/18/2015 7:03:00 AM From: Lingam, Siva Created By: Siva.Lingam@nrc.gov Recipients:

"Markley, Michael" <Michael.Markley@nrc.gov>

Tracking Status: None "McHale, John" <John.McHale@nrc.gov>

Tracking Status: None "Stevens, Gary" <Gary.Stevens@nrc.gov>

Tracking Status: None "Regner, Lisa" <Lisa.Regner@nrc.gov>

Tracking Status: None "Burkhardt, Janet" <Janet.Burkhardt@nrc.gov>

Tracking Status: None

"'jdshaw@nppd.com'" <jdshaw@nppd.com>

Tracking Status: None Post Office:

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