DCL-19-049, Owner'S Activity Report for Unit 1 Twenty-first Refueling Outage

Owner'S Activity Report for Unit 1 Twenty-first Refueling Outage

ML19164A152
Person / Time
Site:	Diablo Canyon
Issue date:	06/13/2019
From:	Gerfen P Pacific Gas & Electric Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
DCL-19-049
Download: ML19164A152 (6)

Text

Pacific Gas and Electric Company~

Paula Gerten Diablo Canyon Power Plant Site Vice President Mail code 104/5/502 P.O. Box 56 Avila Beach, CA 93424 805.545.4596 Internal: 691.4596 Fax: 805.545.4234 June 13, 2019 PG&E Letter DCL-19-049 U.S. Nuclear Regulatory Commission 10 CFR 50.4 ATTN: Document Control Desk Washington, DC 20555-0001 Docket No. 50-275, OL-DPR-80 Diablo Canyon Unit 1 Owner's Activity Report for Unit 1 Twenty-first Refueling Outage In accordance with American Society of Mechanical Engineers (ASME) Code Case N-532-5, enclosed is the Owner's Activity Report for inservice inspection (ISi) activities performed at Diablo Canyon Power Plant through the completion of the Unit 1 Twenty-first Refueling Outage (1 R21 ).

Code Case N-532-5 was used as an alternative to the requirements of ASME Section XI, Article IWA-6000, as listed in Regulatory Guide 1.147, "lnservice Inspection Code Case Acceptability, ASME Section XI, Division 1," Revision 18, and approved in accordance with 10 CFR 50.55a(b )(5).

There are no new or revised regulatory commitments (as defined by NEI 99-04) in this submittal.

If you have any questions regarding the information enclosed, or other ISi program activities, please contact Mr. Ken Bych, Manager, Technical Support Engineering, at (805) 545-4241.

AJ~ fe.c~ -f-1 Paula Gerten dqmg/6192/50942981-2 Enclosure cc/enc: Scott A. Morris, NRC Region IV Administrator Christopher W. Newport, NRC Senior Resident Inspector Balwant K. Singal, NRR Senior Project Manager State of California, Pressure Vessel Unit A member of the STARS Alliance Callaway

• Diablo Canyon

• Palo Verde

• Wolf Creek

Enclosure PG&E Letter DCL-19-049 Pacific Gas and Electric Company Diablo Canyon Power Plant Owner's Activity Report for Unit 1 Twenty-first Refueling Outage

DIABLO CANYON POWER PLANT UNIT 1 REFUELING OUTAGE: 1 R21 Operating License No. DPR-80 USNRC Docket No. 50-275 OWNER'S ACTIVITY REPORT Rev. 0 Contents:

==

Introduction:==

OAR-1 Report Number: DCPP-1 R21:

Table 1: Items with Flaws or Relevant Conditions That Required Evaluation for Continued Service.

Table 2: Abstract of Repair/Replacement Activities Required for Continued Service.

Prepared By: Date 5/t~/lf Reviewed By: Date s hs /,.9 Approved By: Date ~- u- /45/

Document Date: May 15, 2019 Pacific Gas and Electric Company 77 Beale Street, San Francisco, CA 94106 Diablo Canyon Power Plant L P.O. Box 56, Avila Beach, CA 93424 Page 1 of 4

INTRODUCTION lnservice inspection (ISi) of scheduled ASME Section XI components and their supports at Pacific Gas and Electric Company's Diablo Canyon Power Plant (DCPP) was completed during the Unit 1 twenty-first refueling outage (1 R21) from February 2019 through March 2019.

1R21 was the second outage in the first period within the fourth 10-year ISi interval.

This Owner's Activity Report OAR-1, complies with the provisions of Code Case N-532-5 as 1

approved by Regulatory Guide 1.147, Revision 18.

The OAR-1 Report covers any mid cycle work completed after July 19, 2017, and any applicable 1R21 work completed prior to and including April 18, 2019.

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FORM OAR-1 OWNERS ACTIVITY REPORT -- DCPP-1 R21 Report Number DCPP-1 R21 Plant __ D_ia_b_lo_C_an_y,_o_n_N_uc_l_e_ar_P_o_w_er_P_la_n~t,_P_.O_._B_o_x_5_6~,_A_v_il_a_B_e_a_c_h,_,C_al_if_o_rn_ia__ 93_4_2_4_ _ _ _ _ _ __

Unit No. _ _ _ _ _ _ _ C_o_m_m_e_r_c_ia_l_s_e_rv_ic_e_da_t_e___ M_a~y_7~,_1_9_8_5_ _ _ Refueling outage no. 1R21 Current inspection interval --'I---'----W-'---=B"--'-/'----'-IW---'----C-=------'--/---'----IW'--'--=D-'-/-'-IW. :. . :. . :. F_-_4.:. . : t;. .:.h_ _ __cl---'----W-'---=E=---.c_/'----'-IW-'-'L=----3=r-=d_ _ _ _ _ _ __

(1st, 2nd , 3rd, 4th , other)

Current inspection period _ _ _IW_B_/_I_W_C_/_IW_D_/~IW'---F_-_1s~t_ _ _ _ _ lW_E_/_IW_L_-_1s ~ t ' - - - - - - - - - -

(1 st, 2nd, 3rd)

Edition and Addenda of Section XI applicable to the inspection plans __I_W_B_/_C_/D_/_F~,_2_0_0_7_E_d_/_20_0_8_A_dd_ __

IWE/IWL, 2007 Ed / 2008 Add Date and revision of inspection plans IWB / IWC / IWD / IWF -- 4/18/2017 Rev. 0 IWE / IWL -- 4/4/19 Rev . 0 Edition and addenda of Section XI applicable to repair/replacement activities, if different than the inspection plans No Difference Code Cases used: N-532-5 N-722-1 N-740-2 N-770-2 (if applicable)

CERTIFICATE OF CONFORMANCE I certify that (a) the statements made in this report are correct; (b) the examinations and tests meet the Inspection Plan as required by the ASME Code, Section XI; and (c) the repair/replacement activities and evaluations supporting the completion of 1 R21 (refueling outage no) conform to the requirements of Section XI.

Date _ "5

_ * --- ~__ .- _,_ / _ ~- - - -

CERTIFICATE OF INSERVICE INSPECTION I, the undersigned, holding a valid commission issued by the National Board of Boiler and Pressure Vessel Inspectors and employed by The Hartford Steam Boiler Inspection and Insurance Company of Connecticut have inspected the items described in this Owner's Activity Report, and state that, to the best of my knowledge and belief, the Owner has performed all activities represented by this report in accordance with the requirements of Section XI.

By signing this certificate neither the Inspector nor his employer makes any warranty, expressed or implied , concerning the repair/replacement activities and evaluation described in this report. Furthermore, neither the Inspector nor his employer shall be liable in any manner for an personal injury or property damage or a loss of any kind arising from or connected with this inspection .

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FORM OAR-1 OWNERS ACTIVITY REPORT -- DCPP-1 R21 TABLE 1 ITEMS WITH FLAWS OR REVELANT CONDITIONS THAT REQUIRED EVALUATION FOR CONTINUED SERVICE Examination Category and Item Number Item Description Evaluation Description Accepted for continued use with:

1) 1st successive UT exam of flaw identified in 1R20.

Results: No flaw growth.

Line-1-109-14S PL CAT R-A Class-1 Weld, WIB-228. 2) Application of Structural Weld Overlay ITEM Rl.11 Rejectable UT indication. (SWOL) during 1R21 SAPN 50915871 (Order/Op 60109329-0010).

Used Code Case N-740-2 per alternative request, REP-RHR-SWOL approved January 2, 2018 (ML17338A131)

TABLE 2 ABSTRACT OF REPAIR/REPLACEMENT ACTIVITIES REQUIRED FOR CONTINUED SERVICE Code Date Repair/Replacement Item Description Description of Work Class Completed Plan Number Application of Struct~ral Line 1-109-14 1 * ; Weld Overlay {SWOL) 3/21/2019 60109329-10 Weld, WIB-228 50970594 Installed 6 plugs by welding 3 CCWHX 1-1 3/12/2019 64137645-600 (Eddy Current evaluations)

Installed 6 plugs by welding 3 CCWHX 1-2 2/26/2019 64220070-200 (Eddy Current evaluations)

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