IR 05000275/2023010

NRC Inspection Report 05000275 2023010 and 05000323 2023010

ML23123A327
Person / Time
Site:	Diablo Canyon
Issue date:	05/11/2023
From:	Vincent Gaddy NRC/RGN-IV/DORS/EB1
To:	Gerfen P Pacific Gas & Electric Co
Gaddy V
References
IR 2023010
Download: ML23123A327 (10)

Text

May 11, 2023

SUBJECT:

DIABLO CANYON POWER PLANT, UNITS 1 AND 2 - NRC INSPECTION REPORT 05000275/2023010 AND 05000323/2023010

Dear Paula A. Gerfen:

On April 13, 2023, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Diablo Canyon Power Plant, Units 1 and 2 and discussed the results of this inspection with you and other members of your staff. The results of this inspection are documented in the enclosed report.

No findings or violations of more than minor significance were identified during this inspection.

This letter, its enclosure, and your response (if any) will be made available for public inspection and copying at http://www.nrc.gov/reading-rm/adams.html and at the NRC Public Document Room in accordance with Title 10 of the Code of Federal Regulations 2.390, Public Inspections, Exemptions, Requests for Withholding.

Sincerely, Signed by Gaddy, Vincent on 05/11/23 Vincent G. Gaddy, Chief Engineering Branch 1 Division of Operating Reactor Safety Docket No. 05000275 and 05000323 License No. DPR-80 and DPR-82

Enclosure:

As stated

Inspection Report

Docket Numbers: 05000275 and 05000323 License Numbers: DPR-80 and DPR-82 Report Numbers: 05000275/2023010 and 05000323/2023010 Enterprise Identifier: I-2023-010-0019 Licensee: Pacific Gas and Electric Company Facility: Diablo Canyon Power Plant, Units 1 and 2 Location: Avila Beach, CA Inspection Dates: March 27, 2023 to April 14, 2023 Inspectors: W. Cullum, Senior Reactor Inspector D. Reinert, Senior Reactor Inspector F. Thomas, Reactor Inspector Approved By: Vincent G. Gaddy, Chief Engineering Branch 1 Division of Operating Reactor Safety Enclosure

SUMMARY

The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting a NRC inspection at Diablo Canyon Power Plant, Units 1 and 2, in accordance with the Reactor Oversight Process. The Reactor Oversight Process is the NRCs program for overseeing the safe operation of commercial nuclear power reactors. Refer to https://www.nrc.gov/reactors/operating/oversight.html for more information.

List of Findings and Violations

No findings or violations of more than minor significance were identified.

Additional Tracking Items

None.

INSPECTION SCOPES

Inspections were conducted using the appropriate portions of the inspection procedures (IPs) in effect at the beginning of the inspection unless otherwise noted. Currently approved IPs with their attached revision histories are located on the public website at http://www.nrc.gov/reading-rm/doc-collections/insp-manual/inspection-procedure/index.html. Samples were declared complete when the IP requirements most appropriate to the inspection activity were met consistent with Inspection Manual Chapter (IMC) 2515, Light-Water Reactor Inspection Program - Operations Phase. The inspectors reviewed selected procedures and records, observed activities, and interviewed personnel to assess licensee performance and compliance with Commission rules and regulations, license conditions, site procedures, and standards.

REACTOR SAFETY

71111.21N.03 - Commercial Grade Dedication Commercial Grade Dedication (section 03.01)

The inspectors reviewed the implementation of the licensees processes for dedicating commercial-grade items/services as basic components and/or for procuring safety-related structures, systems, and components for the following samples:

(1) Material Code D956958 Pressure Switch - Plant Location DC-2-23-I-S-PS-5034 -

Description - Containment Penetration Area GE/GE Exhaust Damper Pressure Switch

(2) Material Code D956878 Motor-Operated Valve Long Life (MOVLL) Grease - Plant Location RCS-1-8000A - Description - Pressurizer PORV Block Motor-Operated Valve

(3) Material Code D952926 O-ring - Plant Location DC-2-45-P-MP-MP66 - Description -

Containment Emergency Personnel Hatch

(4) Material Code D933757 Boot - Plant Location DC-1-21-M-MISC-IS2 - Description -

Diesel Generator Combustion Air Intake Silencer 1-2

(5) Material Code D967224 Valve 1-1/2" Gate 800# CS SW - Plant Location DC-2-04-P-V-MS-2-5399 - Description FCV-41 (MSIV) Inspection Port Test Valve

(6) Material Code D951344 Refrigerant R-22 - Plant Location DC-1-23-M-BC-CP-36 -

Description - Refrigerant for Control Room Air Conditioner CP-36

(7) Material Code D944750 Actuator Diaphragm - Plant Location - DC-2-08-P-VOA-CVCS-2-8141C - Description - RCP 2-3 Seal Remote Outlet Isolation Valve

(8) Material Code D955449 Compressor - Plant Location - DC-1-23-M-BC-CP-36 -

Description - Control Room Air Conditioner Compressor CP-36

(9) Material Code D969273 Radiator Core - Plant Location - DC-1/2-21-M-HX-JWR -

Description - Diesel Generator Jacket Water Cooling Radiator

(10) Material Code D967399 Relief Valve Parts Kit - Plant Location - DC-1(2)-P-VR-DEG-1(2)-RV-68, 69, 70 - Description - Diesel Generator Lube Oil Pump Relief Valve

(11) Material Code D956431 Sleeving 1" Silflex - Plant Location - DC-1-09-I-SV-224 -

Description - Accumulator Test Wiring (In Containment)

(12) Material Code D943598 Relay Multipole 5NO 120VAC 2NC 7P - Plant Location - DC-1-23-E-R-RPAM2-RIS59X - Description - New Fuel Pool Rad Monitor Aux Relay

(13) Material Code D935255 Motor 400HP 1200RPM 588SU Frame - Plant Location - DC-2-14-E-MTR-CCWP1 - Description - CCW PP 2-1 Motor

(14) Material Code D963390 Contact Kit 60A 600V 3P F/9560 Starter - Plant Location DC-1-23-E-MTR-CP-36 - Description - CP-36 Control RM Air Conditioner Compressor (North)

(15) Material Code D965229 Diode 600V 300A - Plant Location DC-2-21-E-GN-DEG3 -

Description - Diesel Engine Generator 2-3

INSPECTION RESULTS

No findings were identified.

EXIT MEETINGS AND DEBRIEFS

The inspectors verified no proprietary information was retained or documented in this report.

On April 13, 2023, the inspectors presented the NRC inspection results to Paula A.

Gerfen and other members of the licensee staff.

DOCUMENTS REVIEWED

Inspection Type Designation Description or Title Revision or

Procedure Date

71111.21N.03 Corrective Action 50935656,

Documents 50852197,

50854871,

50855151,

51039343,

50882125,

50882140,

50882498,

50883028,

50895624,

50936528,

50936757,

50937717,

50938548,

50938551,

50938554,

50938555,

50938830,

51045394,

51047065,

51048581,

51056200,

51069446,

51092878,

51102209,

51103947,

51148834,

51151119,

51159825,

51175385,

51041761

Corrective Action 51187228,

Inspection Type Designation Description or Title Revision or

Procedure Date

Documents 51185717,

Resulting from 51185766,

Inspection 51185983,

51186254,

51186932,

51186951,

51187016,

51187092,

51187135,

51185710,

51185965,

51186289,

51186556,

51187260

Drawings 050029, Sheet Misc. [Miscellaneous] Notes (Continued From Sh. 120) 42

20A

050029, Sheet 70 Notes, Symbols & Typical Details for Raceways & Wire 61

433130, Sheet 1, Electrical Single Line Diagram, 480V And 120V AC 17

Page 0 System, Control Room Pressurization System

445093, Sheet 1, Electrical Schematic Diagram, Control Room Ventilation 8

Page 0 System CR-35, CR-36, CP-35, CP-36

496279, Sheet 1, Electrical Schematic Diagram 4160V Diesel Generator 9

Page 0 Control No. 23

6001170, Sheet I & C Diagram of Connections, Low Level Detector with 8

8, Page 1 Local Indicator

663082, Sheet Electrical Schematic and Interconnection Diagram Series 2

54F, Page 1 Boost Exciter Voltage Regulator and Associated Control

Functions for SED 23

663082, Sheet Electrical Schematic and Interconnection Diagram Series 1

54F, Page 1 Boost Exciter Voltage Regulator and Associated Control

Functions for SED 23

663213, Sheet Mechanical Comp [Component] Cooling Water Pump 10

2, Page 1 Motor Outline

Miscellaneous 3501133886 Purchase Order Core Radiator 0

Inspection Type Designation Description or Title Revision or

Procedure Date

DC-663239-41 Composite Operation Manual for Trance Co. Hermetic 09/24/1990

Reciprocating Compressors

RPE 8000001334 Control Room Air Conditioning Compressor and Parts 5

RPE 8000001743 DCI, DEG Sleeve Between Air Intake Silencer and 2

Turbocharger, System 21

RPE 8000003163 Material Substitution for Masoneilan Actuator Diaphragms 0

for Actuators without Backup Air

RPE 8000004614 Specialty Gas 1

RPE 8000005086 Replace DEG [Diesel Engine Generator] Rectifier Diodes 0

RPE 8000005258 U1/U2 Control Room HVAC CP Contactor Replacement 0

RPE C-0001 Containment Hatch O-Rings 3

RPE E-0012 Motor, 400 HP, 4 KV, 1200 RPM, Frame 588 SU 1

RPE E-0016 Resistors 2

RPE E-5000 Varflex Silflex Sleeving 0

RPE E-6930 Cutler Hammer Powered Relays 3

RPE J-7828 Dwyer Instruments Air Flow Pressure Switch (Model 1638) 1

RPE M-022 Diesel Generator Lube Oil Pump 3

RPE M-09005 Grease for Safety Related Limitorque Actuators 0

RPE P-09372 Flowserve - Design Class 1 - 2" and Smaller Valves per 0

"Small VLV.ADV" Design Specification

Procedures AD9 Procurement Control 5

AD9.ID1 Procurement of Items and Related Services 13

AD9.ID10 Suspected Vendor Misrepresentation 1

AD9.ID11 Supplier Evaluation Process 11

AD9.ID2 Procurement of Services 20

AD9.ID4 Establishing Procurement Technical and Quality 17

Requirements

AD9.ID6 Evaluation, Selection, and Control of Suppliers of Items, 7

and Services

AD9.ID7 Receipt Inspection and Acceptance Testing 10

AD9.NQ1 Qualified Suppliers List and Supplier QA Requirements 14

CF3.ID13 Replacement Part Evaluation and CITE 32

CF5.ID1 Receipt of Materials 14

Inspection Type Designation Description or Title Revision or

Procedure Date

OM4.NQ7 Quality Verification External Auditing 5A

OM7.ID1 Problem Identification and Resolution 57

QCP 10.1 Receipt Inspection Program 17

QCP 10.2 Inspection Activities 23

QCP 10.20 Quality Control Laboratory 4

QCP 10.22 Supplemental Verification Activities at Receipt 1A

STP M-21-RTS.1 Return Diesel Engine to Service Following Outage 16

Maintenance

Work Orders 60096546,

60090735,

60098039,

60100031,

60100371,

64011577,

64095322,

64132893,

64140120,

64186067,

60091049,

68048766,

68052082,

60143786

8