ML13078A294

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ASME Section Xi Inservice Inspection Program Relief Request REP-1 U2, Revision 2
ML13078A294
Person / Time
Site: Diablo Canyon Pacific Gas & Electric icon.png
Issue date: 03/05/2013
From: Allen B S
Pacific Gas & Electric Co
To:
Office of Nuclear Reactor Regulation, Document Control Desk
Shared Package
ML130780374 List:
References
DCL-13-021
Download: ML13078A294 (3)
v • d • e


Text

Enclosures 3 and 4 contain Proprietary Information

-Withhold Under 10 CFR 2.390 Pacific Gas and Electric Company March 5, 2013 PG&E Letter DCL-13-021 U.S. Nuclear Regulatory Commission ATTN: Docu ment Control Desk Washington, DC 20555-0001 Docket No. 50-323, OL-DPR-82 Diablo Canyon Unit 2 B arr y S. All e n Site Vice President 10 CFR 50.55a ASME Section Xllnservice Inspection Program Relief Request REP-1 U2, Revision 2

References:

1. PG&E Letter DCL-07-038, "ASME Section XI Inservice Inspection Program Relief Request REP-1 U2," dated March 28, 2007. Diablo Canyon Power Plant Mail Code 104/6 P. O. Box 56 Avila Beach, CA 93424 805.545.4888 Internal:

691.4888 Fax: 805.545.6445

2. PG&E Letter DCL-07-099, "ASME Section XI Inservice Inspection Program Relief Request REP-1 U2,Revision 1, and Response to Request for Additional Information," dated October 22, 2007. 3. PG&E Letter DCL-07-105, "ASME Section XI Inservice Inspection Program Relief Request REP-1 U2, Revision 1; Response to Request for Additional Information," dated November 29, 2007. 4. NRC Letter, "Diablo Canyon Power Plant, Unit No.2 -Approval of Relief Request REP-1 U2, Revision 1, for the Application of Weld Overlay on Dissimilar Metal Welds of Pressurizer Nozzles (TAC No. MD4974 )," dated February 6, 2008 Dear Commissioners and Staff: Pursuant to 10 CFR 50.55a(a)(3)(i), Pacific Gas and Electric Company (PG&E) hereby requests NRC approval for Inservice Inspection Program Relief Request REP-1 U2, Revision 2. This request for relief contains alternative requirements for the ASME Section XI Repair/Replacement Program for preemptive full structural weld overlays to mitigate the potential for primary water stress corrosion cracking of susceptible material at Diablo Canyon Power Plant (DCPP) Unit 2. Enclosures 3 and 4 contain Proprietary Information When separated from Enclosures 3 and 4, this document is decontrolled.

A member o'f the STARS (Strategic Teaming and Resource Sharing) Alliance Callaway

  • Comanche Peak
  • Diablo Canyon
  • Palo Verde
  • Wolf Creek m Enclosures 3 and 4 contain Proprietary Information

-Withhold Under 10 CFR 2.390 Document Control Desk PG&E Letter DCL-13-021 I March 5, 2013 Page 2 The bases for the request for relief are provided in Enclosure

1. The Performance Demonstration Initiative Program alternatives and their bases with respect to ASME Code Section XI , Appendix VIII, Supplement 11 requirements are included in Enclosure
2. Enclosures 3 and 4 to this letter contain AREVA Calculation
  1. 32-9199805-000, "Diablo Canyon Power Plant Unit 2 PZR Safety and Spray Nozzles Planar Flaw Analysis" and AREVA Ca lculation
  1. 32-9199937-000, "DCPP Unit 2 -Evaluat i on of Laminar Indications in Pressurizer Nozzles," respectively, which contain information proprietary to AREVA. Accordingly, Enclosure 5 includes AREVA's Affidavit for the calculations mentioned above. The affidavit is signed by AREVA, the owner of the information.

The affidavit sets forth the basis on which the AREVA proprietary information contained in Enclosures 3 and 4 may be withheld from public disclosure by the Commission, and it addresses with specificity the considerations listed in paragraph (b )(4) of 10 CFR 2.390 of the Commission's regulations.

PG&E requests that the AREVA proprietary information be withheld from public disclosure in accordance with 10 CFR 2.390. Correspondence with respect to the AREVA Affidavit or the AREVA proprietary information provided in Enclosu.res 3 and 4 should reference AREVA Affidavit and be addressed to Gayle F. Elliott, Product Licensing Manager, AREVA NP, 3315 Old Forest Road, Lynchburg, VA 24501. Enclosure 6 contains AREVA Calculation

  1. 32-9200249-000, "Diablo Canyon Power Plant Unit 2 PZR Safety and Spray Nozzles Planar Flaw Analysis -Non Proprietary." Enclosure 7 contains AREVA Calculation
  1. 32-9200291-000, "DCPP Unit 2 -Evaluation of Laminar Indications in Pressurizer Nozzles Proprietary)." PG&E requests authorization of this relief request no later than March 11, 2013, to allow DCPP to transition into Hot Shutdown Mode (Mode 4). This communication contains one new regulatory commitment (as defined by NEI 99-04), which is contained in Enclosure
7. If you have any questions, or require additional information, please contact Tom Baldwin at (805) 545-4720.

Enclosures 3 and 4 contain Proprietary Information When separated from Enclosures 3 and 4, this document is decontrolled.

A member of the STARS (StrategiC Teaming and Resource Sharing) Alliance Callaway

  • Comanche Peak
  • Diablo Canyon
  • Palo Verde
  • Wolf Creek Enclosures 3 and 4 contain Proprietary Information

-Withhold Under 10 CFR 2.390 Document Control Desk PG&E Letter DCL-13-021 M a rch 5 , 2013 Pa ge 3 Sincerely, Site Vice President pns3/6984 SAPN 50540188 Enclosures cc: Diablo Distribution cc/enc: Gonzalo L. Perez, Branch Chief, California Department of Public Health Elmo E. Collins, NRC Region IV Thomas R. Hipschman, NRC Senior Resident Inspector James T. Polickoski, NRR Project Manager State of California, Pressure Vessel Unit Enclosures 3 and 4 contain Proprietary Information When separated from Enclosures 3 and 4, this document is decontrolled.

A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Callaway

  • Comanche Peak
  • Diablo Canyon
  • Palo Verde
  • Wolf Creek
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