ML120440831

Pilgrim Nuclear Power Station - E-mail from R.Guzman to W.Lobo Regarding Relief Request PRR-21 RPV SLC Nozzle Weld Repair - Withdrawal Acknowledgement and Request for Additional Information (TAC No. ME7959)

ML120440831
Person / Time
Site:	Pilgrim
Issue date:	02/13/2012
From:	Guzman R V Plant Licensing Branch 1
To:	Lobo W Entergy Nuclear Operations
Guzman R V, NRR/DORL 415-1030
References
TAC ME7959
Download: ML120440831 (1)

Text

From: Guzman, Richard Sent: Monday, February 13, 2012 5:11 PM To: 'Lobo, Walter'

Subject:

Revised Pilgrim Relief Request (PRR-21) - RPV SLC Nozzle Weld (TAC No. ME7959)

Walter, Shown below is the NRC staff's information request for the subject review which was discussed during our February 8, 2012, conference call. Per that discussion, I understand that Entergy PNPS requests approval of PRR-21 in support of, and prior to, the start of its next refueling outage, currently scheduled for spring 2013. The NRC staff acknowledges that Entergy's January 23, 2012 letter (ADAMS Accession No. ML12032A135), revises the previously submitted PRR-21 request dated August 5, 2011 (ML11230A919). The staff intends to review only the portions of the revised PRR-21, as specified in the August 5, 2011, letter, and supplemented by the January 23, 2012, related to the standby liquid control safe end to nozzle weld RPV-N14-1. As stated in Entergy's August 5, 2011, letter, all other welds included in the original submittal dated March 4, 2011, were withdrawn because the weld configurations do not conform to the previously approved Pilgrim Relief Request PRR-19. As such, this e-mail is to confirm that the March 4, 2011, as supplemented by the applicable sections of the August 5, 2011 letter is being treated as withdrawn.

The NRC staff is currently reviewing the information provided in the January 23, 2012, letter under the subject technical assignment control (TAC) no., and has determined that additional information as shown below is needed to support its review. As agreed in our discussion today, please provide a response within 60 days from the date of this e-mail message.

1. In the licensee's January 23, 2012 (ADAMS Accession No. ML12032A135, Entergy Letter No. 2.12.003), Entergy states that it has evaluated the differences between N-504-3 and N-504-4, and has determined that Entergy would comply with the alternative repair plan using ASME Code Case N-504-3, based on the discussion included in Regulatory Guide (RG) 1.147, Rev. 16. As stated in RG 1.147, "when a licensee initially implements a Code Case, 10 CFR 50.55a requires that the most recent version of that Code Case as listed in Tables 1 and 2 be implemented." The NRC staff considers that the application of this statement to the proposed relief request would require that the Code Case to be used is N-504-4, not 504-3. Please provide the appropriate justification to confirm that compliance with 50.55a is being met in terms of the latest version of the Code Case, N-504-4.

Please contact me if you have any questions.

Thanks, Rich Guzman Sr. Project Manager NRR/DORL US NRC 301-415-1030 Richard.Guzman@nrc.gov