ML081830551

Draft Request for Additional Information, Generic Letter 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized-Water Reactors

ML081830551
Person / Time
Site:	Salem
Issue date:	06/30/2008
From:	Richard Ennis NRC/NRR/ADRO/DORL/LPLI-2
To:	Chernoff H NRC/NRR/ADRO/DORL/LPLI-2
Ennis R, NRR/DORL, 415-1420
References
TAC MC4712, TAC MC4713
Download: ML081830551 (3)

Text

June 30, 2008 MEMORANDUM TO:

Harold K. Chernoff, Chief Plant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation FROM:

Richard B. Ennis, Senior Project Manager /ra/

Plant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation

SUBJECT:

SALEM NUCLEAR GENERATING STATION, UNIT NOS. 1 AND 2, DRAFT REQUEST FOR ADDITIONAL INFORMATION (TAC NOS. MC4712 AND MC4713)

The attached draft request for information (RAI) was transmitted on June 30, 2008, to Mr. Jeff Keenan of PSEG Nuclear LLC (PSEG or the licensee). This information was transmitted as follow-up to a conference call held between the Nuclear Regulatory Commission and PSEG on June 30, 2008, regarding the licensees letter dated June 26, 2008, which requested an extension to complete certain corrective actions associated with Generic Letter (GL) 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized-Water Reactors, for Salem Nuclear Generating Station, Unit Nos. 1 and 2.

This memorandum and the attachment do not convey or represent an NRC staff position regarding the licensees request.

Docket Nos. 50-272 and 50-311

Attachment:

Draft RAI

June 30, 2008 MEMORANDUM TO:

Harold K. Chernoff, Chief Plant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation FROM:

Richard B. Ennis, Senior Project Manager /ra/

Plant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation FROM:

Richard B. Ennis, Senior Project Manager Plant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation

SUBJECT:

SALEM NUCLEAR GENERATING STATION, UNIT NOS. 1 AND 2, DRAFT REQUEST FOR ADDITIONAL INFORMATION (TAC NOS. MC4712 AND MC4713)

The attached draft request for information (RAI) was transmitted on June 30, 2008, to Mr. Jeff Keenan of PSEG Nuclear LLC (PSEG or the licensee). This information was transmitted as follow-up to a conference call held between the Nuclear Regulatory Commission and PSEG on June 30, 2008, regarding the licensees letter dated June 26, 2008, which requested an extension to complete certain corrective actions associated with Generic Letter (GL) 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized-Water Reactors, for Salem Nuclear Generating Station, Unit Nos. 1 and 2.

This memorandum and the attachment do not convey or represent an NRC staff position regarding the licensee's request.

Docket Nos. 50-272 and 50-311

Attachment:

Draft RAI DISTRIBUTION PUBLIC SSmith, NRR/SSIB PKlein, NRR/CSGB PDI-2 Reading RArchitzel, NRR/SSIB MYoder, NRR/CSGB RidsNrrDorlDpr JLehning, NRR/SSIB MScott, NRR/SSIB RidsNrrDorlLpl1-2 LWhitney, NRR/SSIB LDoerflein, Region I RidsNrrPMREnnis RTorres, NRR/SSIB ABurritt, Region I ACCESSION NO.: ML081830551 OFFICE PDI-2/PM NAME REnnis DATE 6/30/08 OFFICIAL RECORD COPY

DRAFT REQUEST FOR ADDITIONAL INFORMATION REGARDING REQUEST FOR EXTENSION RELATED TO GENERIC LETTER 2004-02 CORRECTIVE ACTIONS SALEM NUCLEAR GENERATING STATION, UNIT NOS. 1 AND 2 DOCKET NOS. 50-272 AND 50-311 By letter dated June 26, 2008, PSEG Nuclear LLC (PSEG or the licensee) requested an extension to complete corrective actions associated with Nuclear Regulatory Commission (NRC)

Generic Letter (GL) 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized-Water Reactors, for Salem Nuclear Generating Station (Salem), Unit Nos. 1 and 2. Specifically, PSEG requested an extension to December 31, 2008, for completion of the corrective actions and an additional 90 days to provide an updated GL 2004-02 submittal to the NRC (i.e., prior to March 31, 2009). The NRC had previously approved an extension for Salem from the GL 2004-02 due date of December 31, 2007, until June 30, 2008, via NRC letter dated December 21, 2007.

As discussed in a conference call between the NRC staff and PSEG on June 30, 2008, the staff requests that the following additional information be provided to support the extension request.

1)

Please provide details of contingency actions (analyses or modifications) that PSEG will take to ensure that testing completed in the requested extension window will ensure issues associated with GL 2004-02 are fully addressed and that actions required to place the plant within the conditions bounded by the testing will occur by a certain date given the test results. This may involve the need for an additional extension request. There should be confidence that all contingency actions, if needed, will be completed no later than the end of 2009.

2)

Please provide the available net positive suction head margin for each unit for the limiting emergency core cooling system (ECCS) alignment (one or two pump operation), and the total head losses associated with the clean strainer and debris, based on testing and analysis that has been completed to date. The NRC staff understands that there may be two conditions, one for non-chemical debris with hotter sump fluid early in the event and one with chemical debris added and cooler sump fluid later in the event. In addition, the staff understands that the limiting ECCS alignment may change based on the total strainer head loss (i.e., the limiting ECCS alignment may be different between the chemically laden debris bed and non-chemically laden debris bed).

Attachment