ML15257A471

Relief Request PRS-3 - Supplement

ML15257A471
Person / Time
Site:	Diablo Canyon
Issue date:	09/14/2015
From:	Allen B Pacific Gas & Electric Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
DCL -15-108
Download: ML15257A471 (4)

Text

Pacific Gas and Electric Company Barry S. Allen Diablo Canyon Power Plant Vice President, Nuclear Services Mail Code 104/6 P. 0. Box 56 Avila Beach, CA 93424 September 14, 2015 805.545.4888 Internal: 691.4888 PG&E Letter DC L-15-1 08 Fax: 805.545.6445 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 Power Plant Unit 1 and Unit 2 Relief Request PRS Supplement

References:

1. PG&E Letter DCL-15-086, "ASME Section Xllnservice Inspection Program Request for Relief PRS-3: Class 1 Piping Vent, Drain, and Test Isolation Devices," dated July 28, 2015

2. Teleconference with NRC, "Diablo Canyon Relief Request PRS-3:

Class 1 Piping Vent, Drain, and Test Isolation Devices, Timeliness of Submittal," dated September 8, 2015

Dear Commissioners and Staff:

In Reference 1, Pacific Gas and Electric Company (PG&E) submitted Relief Request PRS-3 for Diablo Canyon Power Plant Units 1 and 2 for NRC approval.

On September 8, 2015, PG&E discussed with NRC Staff (Reference 2) timeliness of the submittal and revising Section 2, "Applicable Code Edition and Addenda," and Section 6, "Duration of Proposed Alternative," of the proposed relief request in Reference 1 to clarify that the third interval end date for Unit 1 is being extended to November 6, 2015, to include the Unit 1 nineteenth refueling outage (1 R19), as allowed by ASME Code Section XI paragraph IWA-2430(d). The revised version of Sections 2 and 6 are included in the Enclosure to this letter.

PG&E requests expedited approval of the Relief Request PRS-3 by October 15, 2015, as the Unit 1 third inspection interval is scheduled to end on November 6, 2015, at the end of 1R 19. The need for expedited approval was also discussed with NRC Staff (Reference 2). This communication does not contain any new or revised regulatory commitments (as defined by NEI 99-04).

If you have any questions or require additional information, please contact

• Mr. Hossein Hamzehee at (805) 545-4720.

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

• Diablo Canyon

• Palo Verde

• Wolf Creek

Document Control Desk PG&E Letter DCL-15-1 08 September 14, 2015 Page 2 Sincerely, JJ~ :5. 4CL_

Barry S. Allen Vice President, Nuclear Services rntU4231/50033145 Enclosure cc: Diablo Distribution cc/enc: Marc L. Dapas, NRC Region IV Administrator Thomas R. Hipschman, NRC Senior Resident Inspector Siva P. Ling am, NRR Project Manager Gonzalo L. Perez, Branch Chief, California Department of Public Health State of California, Pressure Vessel Unit A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Callaway

• Diablo Canyon

• Palo Verde

• Wolf Creek

Enclosure PG&E Letter DCL-15-1 08 Revised Sections 2 and 6 of Relief Request PRS-3 Proposed Alternative In Accordance with 10 CFR 50.55a(z)(2)

-Compliance with the specified requirements would result in hardship or unusual difficulty without a compensating increase in the level of quality and safety-

Reference:

1. PG&E Letter DCL-15-086, "ASME Section Xllnservice Inspection Program Request for Relief PRS-3: Class 1 Piping Vent, *Drain, and Test Isolation Devices," dated July 28, 2015 In Reference 1, Pacific Gas and Electric Company (PG&E) submitted Relief Request PRS-3 for NRC approval. Sections 2 and 6 of the Relief Request have been revised to clarify that the third interval for Unit 1 is being extended through the Unit 1 nineteenth refueling outage (1 R 19) until November 6, 2015. The revised Section 2, "Applicable Code Edition and Addenda," and Section 6, "Duration of Proposed Alternative," that are presented in this Enclosure replace the previous Section 2 and Section 6 in Reference 1, in their entirety.

2. Applicable Code Edition and Addenda The Diablo Canyon Power Plant (DCPP) third lnservice Inspection Interval Program Plan (ISIPP) is based on the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code,Section XI, 2001 Edition with Addenda through 2003.

The DCPP Unit 1 third inspection interval nominally commenced on January 1, 2006, and nominally would have ended on May 6, 2015, but is being extended through November 6, 2015 to include the Unit 1 nineteenth refueling outage (1 R19) in which the subject inspections are scheduled in accordance with ASME Section XI paragraph IWA-2430(d). The DCPP Unit 2 third inspection interval nominally commenced on July 1, 2006, and is nominally scheduled to end on March 12, 2016. Actual end dates of the intervals are dependent on the completion dates of the 19th refueling outages for each unit, in accordance with ASME Section XI, paragraph IWA 2430(d)(1 ).

6. Duration of Proposed Alternative Relief is requested for the remainder of the DCPP Unit 1 and Unit 2 third inservice inspection (lSI) intervals. The DCPP Unit 1 third inspection interval 1 of 2

Enclosure PG&E Letter DCL-15-108 nominally would have ended on May 6, 2015, but is being extended through November 6, 2015 to include the Unit 1 nineteenth refueling outage (1 R 19) as provided in ASME Section XI paragraph IWA-2430(d). The DCPP Unit 2 third inspection interval is nominally scheduled to end on March 12, 2016.

Actual end dates of the interval are dependent on the completion dates of the 19th refueling outages for each unit, in accordance with ASME Section XI, paragraph IWA-2430(d)(1 ).

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