DCL-12-006, Inservice Inspection Program Plan Revision Per American Society of Mechanical Engineers Boiler and Pressure Vessel Code Section XI

Inservice Inspection Program Plan Revision Per American Society of Mechanical Engineers Boiler and Pressure Vessel Code Section XI

ML12025A306
Person / Time
Site:	Diablo Canyon
Issue date:	01/20/2012
From:	Becker J Pacific Gas & Electric Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
DCL-12-006, OL-DPR-80, OL-DPR-82
Download: ML12025A306 (2)

Text

PacificGas and ElectricCompany' James R.Becker Diablo Canyon Power Plant Site Vice President Mail Code 104/6 P. 0. Box 56 Avila Beach, CA 93424 January 20, 2012 805.545.3462 Internal: 691.3462 Fax: 805,545.6445 PG&E Letter DCL-12-006 U.S. Nuclear Regulatory Commission 10 CFR 50.55a ATTN: Document Control Desk Washington, DC 20555-0001 Docket No. 50-275, OL-DPR-80 Docket No. 50-323, OL-DPR-82 Diablo Canyon Units 1 and 2 DCPP Inservice Inspection Program Plan Revision per American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code Section XI

Dear Commissioners and Staff:

In accordance with the provisions of 10 CFR 50.55a(g)(4)(ii), Pacific Gas and Electric Company (PG&E) submits Diablo Canyon Power Plant (DCPP) Inservice Inspection Program Plan (ISIPP) - Third Ten-Year Inspection Interval, Revision 1.

The DCPP Units 1 and 2 ISIPP for the third inspection interval incorporates the risk-informed inservice inspection (RI-ISI) process for Class 1 and 2 pipe welds.

Revision 1 of the third interval ISIPP continues to be based on the ASME B&PV Code,Section XI, 2001 Edition through 2003 Addenda. The plan incorporates a number of significant changes to the plant completed during the first period of this third inspection interval including:

• replacement of all steam generators

• replacement of both reactor vessel heads

• replacement of reciprocating charging pumps with centrifugal pumps

• replacement of remaining two clad carbon steel charging pump casings with stainless steel casings

• piping changes, including those attendant to the above replacements Revision 1 of the ISIPP also includes updated requirements of ASME Code Cases N-722-1, N-729-1 and N-770-1 as required by recent rulemaking.

The RI-ISI portion of the plan has been updated from the three-period plan approved during the second ten-year interval on November 8, 2001 (TAC No. MB1203 - Unit 1, and TAC No. MB1204 - Unit 2). Implementation of the RI-ISI plan commenced with the second period of the second interval. The request for alternative for continued application of the risk informed process to Category B-J, C-F-1 and C-F-2 piping A member of the STARS (Strategic Teaming and Resource Sharing) Alliance 0 .,

Callaway

• Comanche Peak

• Diablo Canyon

• Palo Verde - San Onofre

• South Texas Project

• Wolf Creek

Document Control Desk PG&E Letter DCL-12-006 January 20, 2012 Page 2 welds is submitted under a separate cover letter (DCL-1 2-007, "Request for Approval of an Alternative to the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code Section XI Examination Requirements for Class 1 and 2 Piping Welds" dated January 20, 2012).

There are no new or revised regulatory commitments as defined by the Nuclear Energy Institute 99-04, "Guidelines for Managing NRC Commitment Changes," dated July 1999, in this submittal.

If you have any questions regarding the information enclosed, or other ISI program activities, please contact Mr. Patrick Nugent, Manager, Technical Support Engineering, at (805) 545-4701.

James R. Efecke Site Vice President rntt/4231/50441474 Enclosure cc: Diablo Distribution cc/enc: Elmo E. Collins, NRC Region IV Michael S. Peck, NRC Senior Resident Alan B. Wang, NRR Project Manager State of California, Pressure Vessel Unit A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Callaway - Comanche Peak

• Diablo Canyon

• Palo Verde 9 San Onofre

• South Texas Project

• Wolf Creek