DCL-09-042, Response to Generic Letter 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized Water Reactors.

Response to Generic Letter 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized Water Reactors.

ML091770158
Person / Time
Site:	Diablo Canyon
Issue date:	06/16/2009
From:	Becker J Pacific Gas & Electric Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
DCL-09-042, GL-04-002
Download: ML091770158 (2)

Text

• . * * *1b PacificGas and Electric Company- James R.Becker Diablo Canyon Power Plant Site Vice President Mail Code 104/5/601 P.Q Box 56 Avila Beach, CA 93424 805.545.3462 June 16, 2009 Internal: 691.3462 Fax: 805.545.6445 PG&E Letter DCL-09-042 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Docket No. 50-275, OL-DPR-80 Diablo Canyon Unit I Completion of Unit 1 Actions in Response to Generic Letter 2004-02, "Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized Water Reactors"

Reference:

1. PG&E Letter DCL-08-059, "Supplemental Response to Generic Letter 2004-02, 'Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized Water Reactors' (Revision 1),"

dated July 10, 2008.

Dear Commissioners and Staff:

By letter dated July 10, 2008 (Reference 1), Pacific Gas and Electric Company (PG&E) provided a revised supplemental response to Generic Letter (GL) 2004-02, "Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents At Pressurized Water Reactors," for Diablo Canyon Power Plant Units 1 and 2.

Reference 1 identified the following actions to be completed prior to restart from the Unit 1 Fifteenth Refueling Outage (steam generator replacement outage): (1) installation of reflective metal insulation and stainless steel-jacketed Temp-Mat insulation on the replacement steam generators; and (2) installation of stainless steel-jacketed Temp-Mat insulation on pressurizer safety valve 8010A. Both actions have been completed.

There are no additional physical modifications required for Unit 1. Accordingly, Unit 1 is in compliance with the regulatory requirements listed in the Applicable Regulatory Requirements section of GL 2004-02.

PG&E makes no regulatory commitments (as defined by NEI 99-04) in this letter.

Ifyou have any questions, or require additional information, please contact Stan Ketelsen at (805) 545-4720.

A/li A member of the STARS (Strategic Teaming and Resource Sharing) Alliance /J9W Callaway - Comanche Peak - Diablo Canyon

• Palo Verde - San Onofre

• South Texas Project

• Wolf Creek

Document Control Desk PG&E Letter DCL-09-042 June 16, 2009 Page 2 I state under penalty of perjury that the foregoing is true and correct.

Executed on June 16, 2009.

James R'-.ecke Site Vice President tcg/4231/50036807 cc: Gary W. Butner, Acting Branch Chief, California Department of Public Health Elmo E. Collins, NRC Region IV Michael S. Peck, NRC Senior Resident Inspector Alan B. Wang, NRC Project Manager Diablo Distribution A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Callaway

• Comanche Peak

• Diablo Canyon

• Palo Verde

• San Onofre

• South Texas Project

• Wolf Creek