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, 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

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

Procedure

Type

Designation

Description or Title

Revision or

Date

Corrective Action

Documents

50935656,

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

71111.21N.03

Corrective Action

51187228,

Inspection

Procedure

Type

Designation

Description or Title

Revision or

Date

Documents

Resulting from

Inspection

51185717,

51185766,

51185983,

51186254,

51186932,

51186951,

51187016,

51187092,

51187135,

51185710,

51185965,

51186289,

51186556,

51187260

050029, Sheet

20A

Misc. [Miscellaneous] Notes (Continued From Sh. 120)

050029, Sheet 70

Notes, Symbols & Typical Details for Raceways & Wire

433130, Sheet 1,

Page 0

Electrical Single Line Diagram, 480V And 120V AC

System, Control Room Pressurization System

445093, Sheet 1,

Page 0

Electrical Schematic Diagram, Control Room Ventilation

System CR-35, CR-36, CP-35, CP-36

496279, Sheet 1,

Page 0

Electrical Schematic Diagram 4160V Diesel Generator

Control No. 23

6001170, Sheet

8, Page 1

I & C Diagram of Connections, Low Level Detector with

Local Indicator

663082, Sheet

54F, Page 1

Electrical Schematic and Interconnection Diagram Series

Boost Exciter Voltage Regulator and Associated Control

Functions for SED 23

663082, Sheet

54F, Page 1

Electrical Schematic and Interconnection Diagram Series

Boost Exciter Voltage Regulator and Associated Control

Functions for SED 23

Drawings

663213, Sheet

2, Page 1

Mechanical Comp [Component] Cooling Water Pump

Motor Outline

Miscellaneous

3501133886

Purchase Order Core Radiator

Inspection

Procedure

Type

Designation

Description or Title

Revision or

Date

DC-663239-41

Composite Operation Manual for Trance Co. Hermetic

Reciprocating Compressors

09/24/1990

RPE 8000001334

Control Room Air Conditioning Compressor and Parts

RPE 8000001743

DCI, DEG Sleeve Between Air Intake Silencer and

Turbocharger, System 21

RPE 8000003163

Material Substitution for Masoneilan Actuator Diaphragms

for Actuators without Backup Air

RPE 8000004614

Specialty Gas

RPE 8000005086

Replace DEG [Diesel Engine Generator] Rectifier Diodes

RPE 8000005258

U1/U2 Control Room HVAC CP Contactor Replacement

RPE C-0001

Containment Hatch O-Rings

RPE E-0012

Motor, 400 HP, 4 KV, 1200 RPM, Frame 588 SU

RPE E-0016

Resistors

RPE E-5000

Varflex Silflex Sleeving

RPE E-6930

Cutler Hammer Powered Relays

RPE J-7828

Dwyer Instruments Air Flow Pressure Switch (Model 1638)

RPE M-022

Diesel Generator Lube Oil Pump

RPE M-09005

Grease for Safety Related Limitorque Actuators

RPE P-09372

Flowserve - Design Class 1 - 2" and Smaller Valves per

"Small VLV.ADV" Design Specification

AD9

Procurement Control

AD9.ID1

Procurement of Items and Related Services

AD9.ID10

Suspected Vendor Misrepresentation

AD9.ID11

Supplier Evaluation Process

AD9.ID2

Procurement of Services

AD9.ID4

Establishing Procurement Technical and Quality

Requirements

AD9.ID6

Evaluation, Selection, and Control of Suppliers of Items,

and Services

AD9.ID7

Receipt Inspection and Acceptance Testing

AD9.NQ1

Qualified Suppliers List and Supplier QA Requirements

CF3.ID13

Replacement Part Evaluation and CITE

Procedures

CF5.ID1

Receipt of Materials

Inspection

Procedure

Type

Designation

Description or Title

Revision or

Date

OM4.NQ7

Quality Verification External Auditing

5A

OM7.ID1

Problem Identification and Resolution

QCP 10.1

Receipt Inspection Program

QCP 10.2

Inspection Activities

QCP 10.20

Quality Control Laboratory

QCP 10.22

Supplemental Verification Activities at Receipt

1A

STP M-21-RTS.1

Return Diesel Engine to Service Following Outage

Maintenance

Work Orders

60096546,

60090735,

60098039,

60100031,

60100371,

64011577,

64095322,

64132893,

64140120,

64186067,

60091049,

68048766,

68052082,

60143786