IR 05000275/2018002

NRC Inspection Report 05000275/2018002 and 05000323/2018002

ML18206A151
Person / Time
Site:	Diablo Canyon
Issue date:	07/24/2018
From:	Mark Haire NRC/RGN-IV/DRP/RPB-A
To:	Welsch J Pacific Gas & Electric Co
Haire M
References
IR 2018002
Download: ML18206A151 (20)

Text

July 24, 2018

SUBJECT:

DIABLO CANYON POWER PLANT - NRC INSPECTION REPORT 05000275/2018002 AND 05000323/2018002

Dear Mr. Welsch:

On June 30, 2018, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at your Diablo Canyon Power Plant, Units 1 and 2. On July 9, 2018, the NRC inspectors discussed the results of this inspection with Ms. P. Gerfen, Senior Director Plant Manager, and other members of your staff. The results of this inspection are documented in the enclosed report.

The NRC inspectors did not identify any findings or violations of more than minor significance.

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 10 CFR 2.390, Public Inspections, Exemptions, Requests for Withholding.

Sincerely,

/RA/

Mark S. Haire, Chief Project Branch A Division of Reactor Projects

Docket Nos. 50-275 and 50-323 License Nos. DPR-80 and DPR-82

Enclosure:

Inspection Report 05000275/2018002

and 05000323/2018002 w/ Attachment 1. Documents Reviewed 2. RFI for Resident Inspection - 2nd Quarter

Enclosure U.S. NUCLEAR REGULATORY COMMISSION

Inspection Report

Docket Numbers:

05000275 and 05000323

License Numbers:

DPR-80 and DPR-82

Report Numbers:

05000275/2018002 and 05000323/2018002

Licensee:

Pacific Gas and Electric Company

Facility:

Diablo Canyon Power Plant, Units 1 and 2

Location:

Avila Beach, California

Inspection Dates:

April 1, 2018 to June 30, 2018

Inspectors:

C. Newport, Senior Resident Inspector

J. Reynoso, Resident Inspector

R. Alexander, Senior Project Engineer

G. Kolcum, Senior Resident Inspector - Columbia Generating Station

Approved By:

Mark S. Haire, Chief

Project Branch A

Division of Reactor Projects

SUMMARY

The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting a baseline 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 during the inspection.

PLANT STATUS

Units 1 and 2 began the inspection period at full power.

On April 9, 2018, Unit 1 reduced power to 50 percent to clean water boxes and condensers. Unit 1 returned to full power on April 15, 2018.

On May 30, 2018, Unit 1 reduced power to 50 percent to troubleshoot a faulty alarm circuit on main feedwater pump 1-2. Unit 1 returned to full power on May 31, 2018.

Units 1 and 2 operated at full power for the remainder of the inspection period.

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 performed plant status activities described in IMC 2515 Appendix D, Plant Status, and conducted routine reviews using IP 71152, Problem Identification and Resolution. 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.

71111.01 - Adverse Weather Protection

Summer Readiness (1 Sample)

The inspectors evaluated summer readiness of offsite and alternate alternating current power systems.

Impending Severe Weather (1 Sample)

The inspectors evaluated readiness for impending adverse weather conditions due to increased ocean swells on May 19, 2018.

71111.04 - Equipment Alignment

Partial Walkdown (4 Samples)

The inspectors evaluated system configurations during partial walkdowns of the following systems/trains:

(1) Unit 2, turbine driven auxiliary feedwater pump 2-1 on April 11, 2018

(2) Unit 2, centrifugal charging pump 2-1 on April 23, 2018

(3) Unit 1, turbine driven auxiliary feedwater pump 1-1 on April 24, 2018

(4) Unit 1, auxiliary saltwater pump 1-1 on June 25, 2018

71111.05AQ - Fire Protection Annual/Quarterly

Quarterly Inspection (5 Samples)

The inspectors evaluated fire protection program implementation in the following selected areas:

(1) Unit 1, turbine building 4 kV rooms on April 5, 2018

(2) Units 1 and 2, turbine building on the 85 foot elevation on April 5-6, 2018

(3) Units 1 and 2, auxiliary building on the 54 and 64 foot elevations on April 10, 2018

(4) Units 1 and 2, H block on the 140 foot elevation on May 8, 2018

(5) Unit 1, H block on the 115 foot elevation on June 13, 2018

71111.11 - Licensed Operator Requalification Program and Licensed Operator Performance

Operator Requalification (1 Sample)

The inspectors observed and evaluated a crew of licensed operators in the plants simulator during an in-progress annual requalification operating test on June 12, 2018.

Operator Performance (1 Sample)

The inspectors observed and evaluated operator performance during the following activities:

(1) Units 1 and 2, impending weather due to ocean swell conditions on May 19, 2018

(2) Units 1 and 2, monitoring of steam generator water level trends from oscillating feedwater regulating valves on June 20, 2018

(3) Unit 1, preparations for a Technical Specification 3.0.3 entry and potential power ramp on June 28, 2018

71111.12 - Maintenance Effectiveness

Routine Maintenance Effectiveness (2 Samples)

The inspectors evaluated the effectiveness of routine maintenance activities associated with the following equipment and/or safety significant functions:

(1) Units 1 and 2, reactor protection system

(2) Units 1 and 2, anticipated transient without scram mitigation system actuation circuitry maintenance

71111.13 - Maintenance Risk Assessments and Emergent Work Control

The inspectors evaluated the risk assessments for the following planned and emergent work activities:

(1) Unit 2, safety-related 4 kV bus and startup feeder circuit breaker loose lamp connection on April 10-11, 2018

(2) Unit 1, turbine driven auxiliary feedwater pump 1-1 out of service for maintenance on April 24, 2018

(3) Units 1 and 2, raw water storage reservoir out of service for maintenance on May 8, 2018

71111.15 - Operability Determinations and Functionality Assessments

The inspectors evaluated the following operability determinations and functionality assessments:

(1) Unit 2, fire sprinkler failure and actuation, 115 foot elevation containment penetration area, Notification 50973907, on April 2, 2018

(2) Unit 1, vital battery 1-3 storage rack missing hardware, Notification 50975547, on April 12, 2018

(3) Unit 2, pressurizer heaters not maintaining pressure, Notification 50973588, on April 19, 2018

(4) Unit 1, control room ventilation damper failure, Notification 50977029, on April 23, 2018

(5) Unit 1, 480 volt ductwork seismic gap, Notification 50870358, on May 14, 2018

(6) Unit 2, main steam safety RV-225 acoustic-related vibration, Notification 50975300, on May 22, 2018

(7) Units 1 and 2, pressure-operated relief valve solenoid, valve environmental qualification configuration discrepancy, Notification 50985298, on June 21, 2018

71111.19 - Post Maintenance Testing

The inspectors evaluated the following post maintenance tests:

(1) Unit 2, auxiliary building ventilation system supply fan S-31 and damper repairs, Work Order 64162387, on March 23, 2018

(2) Unit 1, centrifugal charging pump 1-1 oil change, Work Order 64164422, on April 3, 2018

(3) Unit 2, auxiliary feedwater pump 1-3, discharge header level control valve LCV-113 position circuit replacement, Work Order 60107341, on April 4-5, 2018

(4) Unit 2, control room ventilation compressor motor CR-37 replacement, Work Order 64168868, on April 10-12, 2018

(5) Unit 2, containment spray pump 2-2, anti-rotation pin replacement, Work Order 64164327, on April 18, 2018

(6) Unit 1, auxiliary feedwater pump 1-2, pump and valve maintenance, Work Order 64188501, on May 15, 2018

71111.22 - Surveillance Testing

The inspectors evaluated the following surveillance tests:

Routine

(1) Unit 1, exercising residual heat removal pump suction valve 8700B, per procedure STP V-3M4B, on April 17, 2018

(2) Unit 1, full length control rod testing, per procedure STP R-1A, on May 10, 2018

(3) Unit 2, solid-state protection system train B actuation logic test, per procedure STP I-38-B.1, on May 23, 2018

In-service (1 Samples)

(1) Unit 2, comprehensive pump test of component cooling water pump 2-3, per procedure STP P-CCW-A23, on May 17, 2018

71114.06 - Drill Evaluation

Drill/Training Evolution (1 Sample)

The inspectors evaluated a simulator-based licensed operator requalification training scenario that included implementation of the licensees emergency plan on June 20,

OTHER ACTIVITIES - BASELINE

71151 - Performance Indicator Verification

The inspectors verified licensee performance indicators submittals listed below:

(1) MS05: Units 1 and 2, Safety System Functional Failures (SSFFs) [04/01/2017-03/31/2018]

(2) MS06: Units 1 and 2, Emergency AC Power Systems [04/01/2017-03/31/2018]

(3) MS07: Units 1 and 2, High Pressure Injection Systems [04/01/2017-03/31/2018]

71152 - Problem Identification and Resolution

Semiannual Trend Review (1 Sample)

The inspectors reviewed the licensees corrective action program for trends that might be indicative of a more significant safety issue.

Annual Follow-up of Selected Issues (2 Samples)

The inspectors reviewed the licensees implementation of its corrective action program related to the following issues:

(1) Notification 50972378, evaluation and corrective actions related to a change to the Technical Specification (TS) Bases for TS 3.3.1, Reactor Trip System (RTS)

Instrumentation, in October 2014.

(2) Operator work around program on May 8,

INSPECTION RESULTS

Assessment

71152 - Problem

Identification and Resolution As part of the semi-annual trend review, the inspectors reviewed the licensees implementation of its corrective action program related to operating experience, self-assessments, and audits into human performance trends. Based on the samples reviewed, the team determined that PG&Es performance in each of these areas adequately supported nuclear safety.

EXIT MEETINGS AND DEBRIEFS

On July 8, 2018, the inspectors presented the quarterly resident inspector inspection results to Ms. P. Gerfen, Senior Director Plant Manager, and other members of the licensee staff. The inspectors verified no proprietary information was retained or documented in this report.

DOCUMENTS REVIEWED

71111.01: Adverse Weather Protection

Notifications

50980891

50980602

50980794

50981060

Procedures

Number

Title

Revision

CPM-16

Severe Weather

MA1.ID23

Intake Preparedness for High Debris Loading Events

OM1.ID4

Interface Requirements for Transmission & Distribution

Facilities at DCPP

8A

OP J-2:VIII

Guidelines for Reliable Transmission Service for DCPP

OP O-23

System Dispatch Instruction

OP O-28

Operations Intake Response to Storms or Biofouling

OP1.ID0

Intake Management for Storms and Biofouling

1A

Drawing

Number

Description

Revision

2110, Sh. 1

Single Line Diagram 500/230/25/12/4.16 kV Systems

Other

Number

Description

Revision

PG&E 2017 Electric Transmission Reliability Assessment

Study Report

DCM No. S-61B

500-kV and 230-kV Systems

71111.04: Equipment Alignment

Notifications

50977362

50922408

50966007

64186188

60102998

Procedures

Number

Title

Revision

OP B-1A:XI

CVCS - Charging Pumps - Clearing for Maintenance and

Returning to Service

OP D-1:II

Auxiliary Feedwater System - Alignment Verification for

Plant Startup

OP E-5

Auxiliary Saltwater Make Available

OP O-36

Protected Equipment Postings

STP ASW P-

ASW-11

Comprehensive Test of Auxiliary Saltwater Pump

STP V-2A2

Unit 1 and 2 Cross-Tie Valve FCV-601

Drawings

Number

Description

Revision

107703

Auxiliary Feedwater System

107709

Charging System

107709

2-1 Charging Pump

71111.05: Fire Protection

Notifications

50975289

50953686

50950905

50950904

50950908

50965010

50979693

Procedures

Number

Title

Revision

MA1.ID9

Compressed Gas Cylinder Control

OM8.ID1

Fire Loss Prevention

OM8.ID4

Control of Flammable and Combustible Materials

STP M-80B

Indoor Fire Hose Operability Testing

Drawings

Number

Description

Revision

RA-11

Fire Drawing: H Block Elevation 140

Drawings

Number

Description

Revision

RA-9/10

Fire Drawing: Radiological Control Area & H Block Elev 115 10

TB-3/14

Fire Drawing: Unit 1 and 2 Turbine Building Area 85 foot

elevation

TB-8

Fire Drawing: Unit 1 Turbine Building Area 119 foot

elevation

Other

Number

Description

Revision /

Date

M-824

Controlled Combustible Loading Calculation

11/14/2017

RA-1

Pre-Fire Plan: Radiological Control Area (RCA) 54 & 64

Unit 1 and 2

71111.11: Licensed Operator Requalification Program and Licensed Operator

Performance

Notifications

50985953

50986728

Procedures

Number

Title

Revision

JSIM-507

Evaluator Skills

OM7.ID13

Technical Evaluation

OP1.DC10

Conduct of Operations

TQ2.DC15

Licensed Operator Annual/Biennial Exam Development and

Administration

TQ2.DC3

Licensed Operator Continuing Training Program

71111.12: Maintenance Effectiveness

Notifications

50970936

50877169

50945797

50852077

50851453

50916880

50852076

50365571

50482201

50482454

50554954

50487370

50850974

50955264

50955157

50867633

Work Orders

60090220

60090199

60095060

60090300

60078509

60105081

64192562

64188915

64066510

50609690

Procedures

Number

Title

Revision

CF3.ID9

Design Change Notice

MA1.ID17

Maintenance Rule Monitoring Program

MP I-9.2-1

AMSAC Preventative Maintenance

STP I-92A

AMSAC Functional Testing

Drawings

Number

Description

Revision /

Date

DCL-87-258

Plant Specific AMSAC Design

10/30/1987

DCP-M-39065

AMSAC Functional Testing and Design

Other

Number

Description

Revision

DCM S-38A

Plant Protection System

11A

71111.13: Maintenance Risk Assessments and Emergent Work Control

Notifications

50975328

50801872

50634503

Work Orders

60110192

64170209

Procedures

Number

Title

Revision

AD7.DC6

On-Line Maintenance Risk Management

AD7.ID14

Assessment of Integrated Risk

OP F-3:V

Raw Water Reservoir Remove From Service

Procedures

Number

Title

Revision

OP O-40

Indicating Lamp Replacement

STP I-1C

Routine Weekly Checks Required By Licensee

118

71111.15: Operability Determinations and Functionality Assessments

Notifications

50975547

50973907

50973909

50871971

50973908

50870359

50870390

50979714

50869814

50869818

50979713

50979295

50977029

50976710

50975777

50976669

50976689

50975776

50925760

50975300

50442196

50973588

50976396

50985298

50985639

Procedures

Number

Title

Revision

AD7.ID18

Plant Health Prioritization Committee

AD7.ID2

Daily Notification Review

CF3, ID3

Environmental Qualification Program

9A

MA1.DC58

Troubleshooting Evidence Preservation and Forensic

Analysis

MA1.ID26

Troubleshooting

OM7.ID12

Operability Determination

OM7.ID7

Emerging Issue and Event Investigation

OM8.ID2

Fire System Impairment

OP H-5:III

Control Room Ventilation System - Shutdown and Clearing

STP M-6A

Routine Surveillance Testing of Control Room Ventilation

System

Drawings

Number

Description

Revision

106718

Units 1 & 2 Firewater Inside Auxiliary Building

27

Drawings

Number

Description

Revision

106723

Control Room HVAC, Sheet 16

107707

Reactor Coolant System, Sheet 3

Other

Number

Description

Revision /

Date

DCM S-23F

Control Room Ventilation System

Calculation EQP-

230.1

Component Supports - Battery Racks

2/22/1989

ECG 18.0

Fire Protection

71111.19: Post-Maintenance Testing

Notifications

50974516

50974176

50954699

50980381

Work Orders

60107341

64186313

64168868

60106784

64164422

60110022

64164327

64180694

64180693

64169242

64162387

Procedures

Number

Title

Revision

MP E-53.1A

Generic 115 and 480 Volt Motor Swap

MP E-53.2

Split End Bell, 4000 Volt Motor Overhaul

MP E-53.7

Maintenance of ITT valves

2A

MP E-8.1

Centrifugal Charging Pump Motor Overhaul

MP M-23-FAN.4

Preventative Maintenance of Ventilation Fans

OP H-5:IV

Control Room Ventilation System Mode Changes

STP P-AFW-12

Auxiliary Feedwater System Pump and Valve Routine

Testing

STP V-2U4D

Exercising SG 1-4 AFW Supply Valve

STP V-33P6B

Exercising Valve LCV-113 Auxiliary Feedwater

U1 MP 1-3-L113

Steam Generator 1-4 AFW Supply LCV113 Calibration

Drawing

Number

Description

Revision

107723,

Sheet 16

Unit 2 Control Room HVAC (South)

105

Other

Number

Description

Date

S-37 Control Room Ventilation Maintenance Testing (Test

Plan)

4/12/2018

71111.22: Surveillance Testing

Notification

50979337

Work Orders

64187021

64191813

64173256

64193005

64152001

64152023

Procedures

Number

Title

Revision

STP I-38-B.1

SSPS Train B Actuation Logic Test in Modes 1,2,3, or 4

STP I-38-B.2

SSPS Train B SI Reset Timer and Slave Relay K602 Test in

Modes 1,2,3, or 4

2A

STP P-CCW-A23 Comprehensive Pump Test of Component Cooling Water

Pump 2-3

STP R-1A

Exercising Full Length Control Rods

STP V-2D2B

Exercising and Position Verification of Valve 8700B

3A

STP V-3M4B

Exercising RHR Pump 2 Suction Valve 8700B

7A

Drawing

Number

Description

Revision

107714

Component Cooling Water Pumps

Other

Number

Description

Revision

ASME OM Code-2004

2004

ASME Code Case OMN-16

71114.06: Drill Evaluation

Notification

50986520

Procedures

Number

Title

Revision /

Date

ES1213-B

Diablo Canyon Power Plant Emergency Planning Scenario

Synopsis/Event Description - LOCA

6/12/2018

TQ2.DC3

Licensed Operator Training Program

71151: Performance Indicator Verification

Notifications

50934650

50934243

Other

Number

Description

Date

CD-Entry 4.0

Unit 1/2, Consolidated Data Log MS06 / MS07

03/31/2018

71152: Problem Identification and Resolution

Notifications

50972378

50609587

50929308

50955568

50978266

50679868

50973233

50952177

50960693

50978531

50925760

50974927

50952407

50978266

50978531

50960156

50394106

50968831

50971629

50978356

50974968

50958921

Procedures

Number

Title

Revision

AR PK03-06

NIS Detector Volt Loss

OP AP-5

Malfunction of Eagle 21 Protection or Control Channel

OP1.DC40

Operations Equipment Deficiency and Adverse Condition

Monitoring

Other

Number

Description

Date

LBIE 08-010

TS B3.3.1 (5), Source Range Neutron Flux

10/14/2014

Request for Information for

Resident Inspection at

Diablo Canyon Power Plant -

2nd Quarter 2018

Please provide the following documents (use date range of document request unless

otherwise noted):

1. Summary listing of all root and apparent cause evaluations performed on this system

2. Summary listing of all condition reports written on this system, sorted by category type

3. Summary listing of OE screening and dispositioning reviews

4. Summary listing of all corrective maintenance work orders, with description of work,

performed on this system

5. List of all work orders, with description of work, planned within the next 6 months (from

start of applicable quarter).

6. List of maintenance rule functional failure assessments - regardless of the result -

performed on this system for previous two years. Include condition report numbers for

each item on the list

7. Summary list of system design calculations

8. Summary list of fire impairments associated with this system

9. List of completed engineering changes and planned engineering changes (within the

next six months of start of applicable quarter) associated with this system.

10. Schedule of system surveillance and work activities for the planned quarter of interest.

11. Summary listing of temporary and permanent modifications associated with the system

completed within the last two years

2. Summary listing of 50.59 screenings and evaluations related to the system

13. Maintenance rule scoping and basis documents

14. Maintenance rule expert panel meeting minutes for meetings related to system

15. Current UA hours and UR data tracking documents (system health report)

2nd Quarter 2018

System: Reactor Protection System (Eagle 21)

IMS Upload Date Requested By: March 25, 2018

Date Range of Document Request: April 1, 2016 - Current

ML18206A151

SUNSI Review

By: MSH/rdr

Non-Sensitive

Sensitive

Publicly Available

Non-Publicly Available

Keyword:

NRC-002

OFFICE

SRI:DRP/A

RI:DRP/A

C:DRS/EB1

C:DRS/EB2

C:DRS/OB

C:DRS/PSB2

NAME

CNewport

JReynoso

TFarnholtz

JDrake

VGaddy

HGepford

SIGNATURE

/RA/

/RA/

/RA/

/RA/

/RA/

/RA/

DATE

7/19/2018

7/19/2018

07/19/2018

7/19/2018

7/22/18

07/19/18

OFFICE

C:DRS/IPAT

SPE:DRP/A

BC:DRP/A

NAME

GGeorge

RAlexander

MHaire

SIGNATURE

/RA/

/RA/

/RA/

DATE

7/20/2018

07/20/18

07/24/2018