IR 05000336/2018001
| ML18124A023 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 05/03/2018 |
| From: | Daniel Schroeder Reactor Projects Branch 2 |
| To: | Stoddard D Dominion Energy Nuclear Connecticut, Dominion Energy |
| Schroeder D | |
| References | |
| IR 2018001 | |
| Download: ML18124A023 (20) | |
Text
D.
UNITED STATES NUCLEAR REGULATORY COMMISSION May 3, 2018
SUBJECT:
MILLSTONE POWER STATION - INTEGRATED INSPECTION REPORT 05000336/2018001 AND 05000423/2018001
Dear Mr. Stoddard:
On March 31, 2018, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Millstone Power Station (Millstone), Units 2 and 3. On April 4, 2018, the NRC inspectors discussed the results of this inspection with Mr. John Daugherty, Site Vice President, and other members of your staff. The results of this inspection are documented in the enclosed report.
No NRC-identified or self-revealing findings 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 the NRC Public Document Room in accordance with Title 10 of the Code of Federal Regulations (10 CFR), Part 2.390, Public Inspections, Exemptions, Requests for Withholding.
Sincerely,
/RA/
Daniel L. Schroeder, Chief Reactor Projects Branch 2 Division of Reactor Projects Docket Nos. 50-336 and 50-423 License Nos. DPR-65 and NPF-49
Enclosure:
Inspection Report 05000336/2018001 and 05000423/2018001
Inspection Report
Docket Numbers: 50-336 and 50-423 License Numbers: DPR-65 and NPF-49 Report Numbers: 05000336/2018001 and 05000423/2018001 Enterprise Identifier: I-2018-001-0082 Licensee: Dominion Energy Nuclear Connecticut, Inc. (Dominion)
Facility: Millstone Power Station, Units 2 and 3 Location: P.O. Box 128 Waterford, CT 06385 Inspection Dates: January 1 to March 31, 2018 Inspectors: J. Fuller, Senior Resident Inspector L. McKown, Resident Inspector C. Highley, Resident Inspector H. Anagnostopoulos, Senior Health Physicist J. Brand, Reactor Inspector Approved By: Daniel L. Schroeder, Chief Reactor Projects Branch 2 Division of Reactor Projects Enclosure
SUMMARY
The U.S. Nuclear Regulatory Commission (NRC) continued monitoring Dominions performance at Millstone Units 2 and 3 by conducting the baseline inspections described in this report 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. Licensee-identified non-cited violations are documented in report section 71153.
No findings or more-than-minor violations were identified.
Additional Tracking Items Type Issue number Title Report Status Section LER 05000336/2016-001-00 Turbine Driven Auxiliary 71153 Closed Feedwater Pump Room HELB Door Left Open
PLANT STATUS
Unit 2 and 3 operated at or near rated thermal power for the entire 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 Dominion Energys performance and compliance with Commission rules and regulations, license conditions, site procedures, and standards.
REACTOR SAFETY
71111.01 - Adverse Weather Protection Impending Severe Weather
The inspectors evaluated readiness for impending adverse weather conditions for the onset of a severe storm with heavy snow and high winds on January 3, 2018.
The inspectors evaluated readiness for impending adverse weather conditions for a winter storm watch on March 6, 2018.
71111.04 - Equipment Alignment Partial Walkdown
The inspectors evaluated system configurations during partial walkdowns of the following systems/trains at Unit 3:
- (1) B emergency diesel generator (EDG) air start system on January 22, 2018
- (2) Charging system with both 'A' and 'B' pumps in service on January 31, 2018
- (3) Control building chiller service water booster pump trains on February 6, 2018
- (4) Auxiliary feedwater injection lines on February 12, 2018
- (5) 'A' steam generator feedwater regulating bypass valve operator and control circuit on March 27, 2018
71111.05A/Q - Fire Protection Annual/Quarterly Quarterly Inspection
The inspectors evaluated fire protection program implementation in the following selected areas:
Unit 2
- (1) Fire areas T-3 (motor driven auxiliary feedwater pump room) and T-4 (steam driven auxiliary feedwater pump room) on January 24, 2018
- (2) Fire area A-21, west direct current switchgear room on January 26, 2018
- (3) Fire area A-15 and A-16, A and B EDG rooms on February 2, 2018
- (4) Fire area T-10, upper vital switchgear room on February 8, 2018 Unit 3
- (5) Fire area ESF-5, SE floor area auxiliary feed pump cubicle [216] on January 10, 2018
- (6) Fire area CB-8, cable spreading area on January 23, 2018
- (7) Fire area FB-1, fuel building elevation 11' pipe chase / pipe tunnel pit on January 29, 2018
71111.06 - Flood Protection Measures Cables
The inspectors evaluated cable submergence protection in:
- (1) Unit 3 north and south cable tunnels on January 23, 2018
71111.11 - Licensed Operator Requalification Program and Licensed Operator Performance Operator Requalification
The inspectors observed and evaluated Unit 2 operator requalification training on reactor coolant system (RCS) leak (AOP-2568), reactor coolant pump malfunctions (AOP-2586),rapid downpower (AOP-2575), immediate operator actions (AOP-2585), reactor trip (EOP-2525), reactor trip recovery (EOP-2526), RCS leak rate calculation, condensate pump trips, heater drain pump trips, and feed water heater tube leak on February 6, 2018.
The inspectors observed and evaluated Unit 3 control room simulator licensed operator requalification training including a small break loss of coolant accident, rapid downpower, and nuclear instrument failure, and verified completion of risk significant operator actions, including the use of alarm response, abnormal, and emergency operating procedures on
February 13, 2018 Operator Performance (2 Samples)
The inspectors observed Unit 2 operator performance on plant downpower, turbine valve testing, annunciator response procedure usage for various turbine control alarms, and control room rounds on January 19, 2018.
The inspectors observed Unit 3 operator performance during 'B' EDG endurance surveillance testing, emergency generator logic sequencer auto test failure and manual re-test, failure and restoration of power range channel 41, and a medical emergency on February 20, 2018.
71111.12 - Maintenance Effectiveness Routine Maintenance Effectiveness
The inspectors evaluated the effectiveness of routine maintenance activities associated with the following equipment and/or safety significant functions:
Unit 2
- (1) B direct current switchgear room chiller (Vital Chiller) maintenance on January 23, 2018
- (2) Radiation monitor failures on February 1, 2018 Unit 3
- (3) 'B' EDG air start system on January 22, 2018
- (4) Charging pump seal leakage on January 31, 2018
- (5) Control building chiller service water booster pump trains on February 6, 2018
- (6) Auxiliary feed water injection lines on February 12, 2018
71111.13 - Maintenance Risk Assessments and Emergent Work Control
The inspectors evaluated the risk assessments for the following planned and emergent work activities:
Unit 2
- (1) B EDG inoperable due to low oil temperature increased risk associated with other scheduled work on January 12, 2018
- (2) Elevated risk due to charging and letdown outage required to perform replacement and calibration of M2LY-110Q, I to P converter, on January 18, 2018
- (3) Functional testing of the steam generator level and auto auxiliary feedwater initiation logic potential Yellow risk window on February 12, 2018
- (4) Auxiliary feedwater testing with potential for causing a Yellow risk window on February 13, 2018 Unit 3
- (5) 'A' turbine driven feed pump overspeed trip push button restoration on January 31, 2018
- (6) Offsite line 310 outage concurrent with deep downpower first contingency to support offsite grid maintenance on February 9, 2018
- (7) Procedurally controlled high risk plan for the manual performance of 'B' train emergency generator logic sequencer testing on February 20, 2018
- (8) Line 348 outage and single output breaker operation on March 29, 2018
71111.15 - Operability Determinations and Functionality Assessments
The inspectors evaluated the following operability determinations and functionality assessments:
Unit 2
- (1) CR1078830 - through wall leakage in emergency core cooling system recirculation piping to refueling water storage tank on January 12, 2018
- (2) B EDG keep warm pump relay failure for oil temperatures on January 16, 2018
- (3) Channel C reactor protection system pre-trip light on January 24, 2018
- (4) Indication of possible over power condition due to leading edge flow meter and total venturi flow mismatch on January 30, 2018 Unit 3
- (5) Reactor plant chilled water system containment isolation valves possible inadequate closing force operability determination and six month periodic review on January 11, 2018
- (6) CR1087819 - steam generator back leakage into auxiliary feedwater on January 11, 2018
- (7) CR1088497 - 'B' EDG air start system on January 22, 2018
- (8) CR1090807 - additional purging performed during monthly A EDG fuel oil storage tank dewatering on February 27, 2018
71111.18 - Plant Modifications
The inspectors evaluated the following temporary modification:
- (1) Unit 3 alternate plant configuration (temporary modification) of charging 'A' and 'C' pumps to support 'A' seal troubleshooting on February 26, 2018
71111.19 - Post Maintenance Testing
The inspectors evaluated post maintenance testing for the following maintenance/repair activities:
Unit 2
- (1) Shim switch failure on January 11, 2018
- (2) B EDG keep warm pump relay failure on January 16, 2018
- (3) M2LY-110Q, I to P converter associated with chemical and volume control system, on January 18, 2018
- (4) B train control room air conditioning unit 2A instrumentation calibration (removal and installation) and compressor inspection on January 22, 2018
- (5) B direct current switchgear room chiller (Vital chiller) after failure to start on January 24, 2018
- (6) Replacement of SI-647 relay (high pressure safety injection isolation valve) on February 12, 2018 Unit 3
- (7) Normal station service transformer to bus 34B seismic door replacement on January 23, 2018
- (8) B' EDG air compressors following troubleshooting and maintenance associated with inability to restore starting air flasks to normal standby pressure on January 23, 2018
- (9) 'D' steam generator level instrument bistable card on February 9, 2018
- (10) Power range nuclear instrument channel 41 power supply failure and restoration on February 20, 2018
- (11) 'A' wide range containment sump level indication troubleshooting and calibration on February 21, 2018
71111.22 - Surveillance Testing The inspectors evaluated the following surveillance tests: Routine
- (1) Unit 2 A EDG monthly surveillances with a slow start on January 3, 2018
- (2) Unit 2 main control valve, main stop valve, and combined intermediate valve operability test on January 19, 2018
- (3) Unit 2 functional test of S/G level and auto auxiliary feedwater initiation logic on February 12, 2018
- (4) Unit 2 auxiliary feedwater valve testing on February 13, 2018
- (5) Unit 3 auxiliary feedwater pump 3FWA*P2 operational readiness test on January 10, 2018
- (6) Unit 3 SP 3612B.5, Primary Coolant Leakage Outside Containment - Summary Sheet on January 31, 2018
- (7) Unit 3 SP 3646A.2-006, Emergency Diesel Generator B 24 Hour Run and Restart, Revision 002, performed February 20-21, 2018
Inservice (2 Samples)
- (1) Unit 2 turbine driven auxiliary feedwater pump quarterly operational testing, MS-V201, V202, and V464 valve stroke and timing tests on January 24, 2018
- (2) Unit 3 SP 3626.10-001, motor control center and rod control booster pump 3SWP*P3A group B test on February 7, 2018
71114.06 - Drill Evaluation Emergency Planning Drill
The inspectors evaluated the conduct of a routine Unit 3 emergency planning drill on
===February 28, 2018.
Drill/Training Evolution (1 Sample)===
The inspectors evaluated licensed operator requalification training, including a drill and exercise performance classification opportunity, at Unit 3 on January 9,
RADIATION SAFETY
71124.02 - Occupational As Low As Reasonably Achievable (ALARA) Planning and Controls Radiological Work Planning
The inspectors evaluated Dominions radiological work planning by reviewing the following activities:
- (1) ALARA Plan AP-2-17-01
- (2) ALARA Plan AP-2-17-02
- (3) ALARA Plan AP-2-17-13
- (4) ALARA Plan AP-3-17-03
- (5) ALARA Plan AP-3-17-11
- (6) ALARA Plan AP-3-18-01 Verification of Dose Estimates and Exposure Tracking Systems (1 Sample)
The inspectors reviewed the current annual collective dose estimate; basis methodology; and measures to track, trend, and reduce occupational doses for ongoing work activities.
The inspectors evaluated the adjustment of exposure estimates or replanning of work. The inspectors reviewed post-job ALARA evaluations.
OTHER ACTIVITIES - BASELINE
71151 - Performance Indicator Verification The inspectors verified licensee performance indicators submittals listed below for the period from January 2017 through December 2017.
Unit 2
- (1) RCS specific activity
- (2) RCS identified leak rate Unit 3
- (3) RCS specific activity
- (4) RCS identified leak rate
71152 - Problem Identification and Resolution Annual Follow-up of Selected Issue
The inspectors reviewed the licensees implementation of its corrective action program related to the following issue:
- (1) Continued failures (trips) of the Unit 3 control building chillers (nine failures of the A chiller and three failures of the B chiller) since implementation of corrective actions for multiple failures of the Unit 3 A chiller in 2014.
71153 - Follow-up of Events and Notices of Enforcement Discretion Licensee Event Reports
The inspectors evaluated the following licensee event reports which can be accessed at https://lersearch.inl.gov/LERSearchCriteria.aspx:
- (1) Licensee Event Report (LER) 2016-001-00, Turbine Driven Auxiliary Feedwater Pump Room HELB [High Energy Line Break] Door Left Open on April 27,
INSPECTION RESULTS
Observations 71152 Annual Follow-up of Selected Issues The inspectors assessed Dominions problem identification threshold, assessment and operability determinations for each of the identified issues, maintenance rule applicability, extent of condition reviews, and the prioritization and timeliness of corrective actions to determine whether Dominion staff was appropriately identifying, characterizing, and correcting problems associated with the chillers and whether the corrective actions were appropriate.
The prior failures in 2014 involved a failed card, several loose and/or broken connections and an unexpected loose soldered connection (vice crimped), and spurious electrical signal spikes on the bearing temperature module. The inspectors determined these conditions have not recurred; and the subsequent failures have been properly evaluated and adequate corrective actions have been completed and/or planned. Specifically, for each of the chiller failures since 2014, Dominion conducted the appropriate level of cause evaluation and properly identified and implemented appropriate applicable corrective actions. Included in these corrective actions were developing modifications for both chillers to prevent spurious electrical signal spike trips and for replacing the existing electromechanical timers with solid state timers. Dominion also reviewed preventive maintenance activities and adjusted specific activity frequencies to enhance the service life of the components.
Licensee Event Turbine Driven Auxiliary Feedwater Pump Room HELB 71153 Report (Closed) [High Energy Line Break] Door Left Open on April 27, 2016 LER 2016-001-00
Description:
On April 27, 2016, with Millstone Power Station Unit 2 in MODE 1 at 100%
power, plant personnel inadvertently left the door to the turbine driven auxiliary feed purnp room open. This condition existed for less than one hour. The door is a high energy line break (HELB) barrier. With the door open there was no HELB protection for the motor driven auxiliary feedwater pumps thus potentially rendering both trains of auxiliary feedwater inoperable. The licensee determined that the cause was human performance error. The door is conspicuously labeled on each side that it is a HELB boundary door and must be closed except for entry and exit from the room. Corrective actions were taken in accordance with the station's corrective action program, and condition report 1035792 was initiated to address this issue.
Closure Basis: The inspectors determined that Dominion's immediate actions to close the HELB door and subsequent corrective actions that created a computer based training, assigned to current and future contractor personnel, to reinforce the requirements associated with HELB doors were adequate. The inspectors determined that the failure to close and latch the HELB door represented a Green licensee identified violation of 10 CFR Part 50, Appendix B, Criterion V. This Green licensee identified violation is documented under Inspection Results in Millstone's IR2018001. The inspectors did not identify any new issues during the review of the LER. This LER is closed.
Licensee Identified Non-Cited Violation 71153 This violation of very low safety significant was identified by the licensee and has been entered into the licensees corrective action program and is being treated as a non-cited violation, consistent with Section 2.3.2 of the Enforcement Policy.
Violation: 10 CFR Part 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, requires that activities affecting quality shall be prescribed by documented instructions, procedures, or drawings, of a type appropriate to the circumstances and shall be accomplished in accordance with these instructions, procedures, or drawings.
Section 4.4 of Operating Procedure 2356, Doors, Revision 004, states in part, site personnel are responsible for ensuring doors [high energy line break boundary doors] are closed and latched after passage.
Contrary to the above, between 7:10 pm and 8:07 pm on April 27, 2016, with Millstone Unit 2 in Mode 1 at 100 percent power, Dominion personnel failed close and latch the HELB barrier door between the steam driven and motor driven auxiliary feedwater pumps, which rendered both trains of auxiliary feedwater inoperable for approximately 57 minutes.
Significance/Severity Level: The inspectors evaluated this finding using IMC 0609.04, Initial Characterization of Findings, and IMC 0609, Appendix A, Exhibit 2, Mitigating Systems Screening Questions. The inspectors determined that the finding was of very low safety significance (Green).
Corrective Action Reference: CR
EXIT MEETINGS AND DEBRIEFS
The inspectors verified no proprietary information was retained or documented in this report.
On April 4, 2018, the inspectors presented the quarterly resident inspector inspection results to Mr. John Daugherty, Site Vice President, and other members of the Millstone staff.
DOCUMENTS REVIEWED
71111.01 - Adverse Weather Protection
Miscellaneous
Surveillance Form SP 3665.2-001, Intake Structure Condition Determination with Vacuum in
Condenser, dated March 6, 2018
Surveillance Form SP 2654R-001, Intake Structure Condition Determination (With Vacuum in
Condenser), dated March 6, 2018
71111.04 - Equipment Alignment
Procedures
OP 3304A, Charging and Letdown
SP 3604A.1, Charging Pump A Operational Readiness Test, Revision 017
SP 3612B.5, Primary Coolant Leakage Outside Containment - Summary Sheet, Revision 001-
01, performed January 31, 2018
SP 3604A.1, Charging Pump A Leaktightness Verification Check, Revision 005-04, performed
January 31, 2018
SP 3626.10-001, Motor Control Center and Rod Control Booster Pump 3SWP*P3A Group B
Test, Revision 012-01
Condition Reports
CA3100943 CA3114923 1068440 1087819
1088497 1088897 1090041 1090044
1090717
Maintenance Orders/Work Orders
53103053362 53103079863 53103084426 53103104435
53103108717 53203153366
Miscellaneous
212-26916, Sheet 4, PID B Emergency Diesel Generator Air Start System, Revision 20
3C19-CHS01-0002, Alternate Plant Configuration for Isolation of A Charging Pump due to Seal
Leakage
212-26904, Sheet 1, PID Charging and Letdown System, Revision 54
212-26933, Sheet 2, PID Service Water System, Revision 90
212-26933, Sheet 4, PID Service Water System, Revision 54
212-26930, Sheet 2, PID B Auxiliary Feedwater System, Revision 49
212-26930, Sheet 3, PID Feed Water System, Revision 30
71111.05 - Fire Protection
Procedures
MP-PROC-ENG-U3-24-FFS-BAP01-ESF-MAP, Revision 0
Millstone Unit 2 Fire Fighting Strategy for Fire Areas: T-10, 13, and 14
Miscellaneous
U3-24-FFS, Millstone Unit 3 Fire Fighting Strategies, Revision 0
Millstone Unit 3 Fire Protection Evaluation Report, Revision 21.3
71111.06 - Flood Protection Measures
Condition Reports
CA277474 1087853
Miscellaneous
ETE-MP-2015-1057, Condition Monitoring of Structures, Revision 0
71111.11 - Licensed Operator Requalification Program
Procedures
SP 2651M, Combined Intermediate Valves Operability Test, Revision 005
SP 2651L, Main Stop Valve Operability Test, Revision 004-01
SP 2651N, Main Control Valve Operability Test, Revision 007
OP 2204, Load Changes, Revision 038
SP 2651L-002, Quarterly Main Stop Valve Operability Test, Revision 002
SP 2651M-002, Combined Intermediate Valves Operability Test, Revision 002
SP 2651N-001, Main Control Operability Test, Revision 003-01
AOP 2585, Immediate Operator Actions, Revision 003-00
AOP 2568, Reactor Coolant System Leak, Revision 016
AOP 2575, Rapid Down Power, Revision 010-00
EOP 2526, Reactor Trip Recovery, Revision 019-00
EOP 2525, Standard Post Trip Action, Revision 028-00
AOP 2586, RCP Malfunctions, Revision 004
SP 3448E41, Train B - Diesel Sequencer Actuation Logic Test, Revision 006-01
SP 3646A.2, Emergency Diesel Generator B Operability Test, Revision 025
Work Orders
53102961788 53103112699 53203157223
Condition Reports
1088243 1088260 1088261 1090369
1090404 1090469
Miscellaneous
ER-AA-RXE- Attachment 4, Reactivity Plan, Dated January 19, 2018
LORP program # S18103, Simulator Exercise Guide Minimum manning/Secondary Malfunctions
course # 70260
LORP program # S18102, Simulator Exercise Guide RCS Leak AOP-2568 course # 70160
71111.12 - Maintenance Effectiveness
Procedures
SP 3626.10-001, Motor Control Center and Rod Control Booster Pump 3SWP*P3A Group B
Test, Revision 012-01
SP 3604A.1, Charging Pump A Operational Readiness Test, Revision 017
Work Orders
53102987484 53103053362 53103079863 53103084426
53103104183 53103104435 53103108717 53203153366
Condition Reports
CA3064516 CA3040023 CA3114923 CA3100943
1068440 1087819 1088497 1088897
1090041 1090044 1090717
Miscellaneous
Failure report number 361 for 'B DC SWGR room chiller, dated March 21, 2002
Radiation monitors Maintenance Rule Evaluations (MRE) Unit 2, since January 1 2016
212-26933, Sheet 2, PID Service Water System, Revision 90
212-26933, Sheet 4, PID Service Water System, Revision 54
3C19-CHS01-0002, Alternate Plant Configuration for Isolation of A Charging Pump due to Seal
Leakage
212-26904, Sheet 1, PID Charging and Letdown System, Revision 54
212-26916, Sheet 4, PID B Emergency Diesel Generator Air Start System, Revision 20
212-26930, Sheet 2, PID B Auxiliary Feedwater System, Revision 49
71111.13 - Maintenance Risk Assessments and Emergent Work Control
Procedures
IC2418D1, Setting Letdown Limiter LLM - 110 High and Low Limit Setpoints, Revision 001-03
C IC 400.05-002, Instrument/Loop Calibration Testing Guidelines, dated January 14, 2013
SP 2610CO, AFW system lineup, valve operability and operational readiness tests, operating,
Revision 001
SP 2610CO-002, 2-FW-43A and 2-FW-43B Failure mode and stroke time IST, Revision 001
SP 2610CO-001, Auxiliary feedwater flow path lineup verification, Revision 001
SP 2402M, Functional test of steam generator level and auto-aux. feedwater initiation logic,
Revision 011
SP 3621.4, Main Feedwater Turbine Emergency Governor and Trip Lockout Test, Revision 001
SP 3448E41, Train B - Diesel Sequencer Actuation Logic Test, Revision 006-01
Condition Reports
1086031 1090369 1090404 1090469
Work Orders
53102961788 53103112699 53203149868 53203157223
Miscellaneous
Medium Risk Plan for CR1086138 dated January 17, 2018
Operator risk report unit 2 dated February 13, 2018
Operator risk report unit 2 dated February 12, 2018
WO# TMC80101
EOOS Version 4.1 for Millstone Unit 3 on February 9, 2018
EOOS Version 4.1 for Millstone Unit 3 on March 29, 2018
High Risk Plan, Eversource TOA 18-00852 and 18-00768
EOOS Version 4.1 for Millstone Unit 3 on January 31, 2018
EOOS Version 4.1 for Millstone Unit 3 on February 20, 2018
71111.15 - Operability Determinations and Functionality Assessments
Procedures
ER-M2-THM-201 attachment 1, Feed flow correction factor determination, Revision 0
ER-M2-THM-201, Determining feed flow correction factors for MP Unit 2, Revision 0
EN 21002, Core Heat Balance, Revision 017
SP 2601D-001, Power range channel and delta T power channel calibration, Revision 016-01
C SP 600.5, QA Diesel Fuel Oil Delivery Post - Offload Results, Revision 003, performed
February 28, 2018
Condition Reports
CA3061625 CA3114923 CA3100943 1078830
1087718 1087785 1087819 1088497
1088558 1088839 1089030 1090041
1090044 1090807
Maintenance Orders/Work Orders
203152143 53203153366
Miscellaneous
Periodic review of OD CR1073242/CA3061625 dated January 11, 2018
Prompt operability determination documentation for CR1073242 dated July 14, 2017
P&ID 6822-34868A, Reactor Protective System Bistable Trip Unit Schematic, Revision dated
December 1, 2004
Unit 2 Control room narrative logs, dated January 25, 2018
Unit 2 Control room narrative logs, dated March 2, 2018
Unit 2 Control room narrative logs, dated February 5-8, 2018
Unit 2 Control room narrative logs, dated January 30, 2018
212-26916, Sheet 4, PID B Emergency Diesel Generator Air Start System, Revision 20
ETE-MP-2017-1144, Code Case N-513-3 Limit Load Planer Flaw Evaluation on Line 6-HCD-3,
Return to RWST, Revision 0
203-26015, PID
- L.P. Safety Injection System, Revision 50
71111.18 - Plant Modifications
Procedures
SP 3612B.5, Primary Coolant Leakage Outside Containment - Summary Sheet, Revision 001-
01, performed January 31, 2018
SP 3604A.1, Charging Pump A Leaktightness Verification Check, Revision 005-04, performed
January 31, 2018
Condition Reports
1088897 1090717
Miscellaneous
3C19-CHS01-0002, Alternate Plant Configuration for Isolation of A Charging Pump due to Seal
Leakage
212-26904, Sheet 1, PID Charging and Letdown System, Revision 54
71111.19 - Post-Maintenance Testing
Procedures
SP 3447B01A-001R, Containment Sump Wide Range Level Rack Channel Calibration Train A,
Revision 000, performed February 12, 2018
SP 3441A10, Power Range Neutron Flux Monitor 41 Channel Calibration, Revision 004
Condition Reports
CA3114923 565360 1087675 1087718
1088410 1088418 1088497 1089726
1089754 1089767 1090369 1090404
Maintenance Orders/Work Orders
53102748541 53102756227 53102916491 53102987484
53103104183 53103123688 53203149868 53203152142
203152143 53203153366 53203156607 53203156690
203156704 53203157223
Miscellaneous
Trouble shooting plan for CR 1087675 M2 Control Element Drive System (CEDS), dated
January 11, 2018
Failure report number 361 for B DC SWGR room chiller, dated March 21, 2002
P&ID 25203-39045 SH 78, Rear Panel Wiring Diagram Engineered Safeguards Section CO-1,
Revision 17
212-26916, Sheet 4, PID B Emergency Diesel Generator Air Start System, Revision 20
71111.22 - Surveillance Testing
Procedures
SP 2610BO-004, Auxiliary Feedwater Pump Turbine Trip Throttle Valve Exercise Test, Revision
2
SP 2610BO-002, Turbine Driven Auxiliary Feedwater Pump and Recirculation Check Valve In-
Service Inspection Testing (IST), Revision 002
SP 2610BO-001, 2-MS-201, 2-MS-202, and 2-MS-464 (SV-4188) Stroke and Timing In-Service
Inspection Testing (IST), Revision 002
SP 2651M, Combined Intermediate Valves Operability Test, Revision 005
SP 2651L, Main Stop Valve Operability Test, Revision 004-01
SP 2651N, Main Control Valve Operability Test, Revision 007
OP 2204, Load Changes, Revision 038
ER-AA-RXE- Attachment 4, Reactivity Plan, Dated January 19, 2018
SP 2651L-002, Quarterly Main Stop Valve Operability Test, Revision 002
SP 2651M-002, Combined Intermediate Valves Operability Test, Revision 002
SP 2651N-001, Main Control Operability Test, Revision 003-01
CM-M2-STI-101, Millstone Unit 2 Technical Specification Surveillance Test Interval (STI0 List,
Revision 7
SP 3622.3, Auxiliary Feedwater Pump 3FWA*P2 Operational Readiness Test, Revision 027
SP 3622.3-001 Surveillance Form - TDAFW Pump Operational Readiness and Quarterly IST
Group B Pump Tests, dated January 10, 2018
SP 2619G, AC Electrical Sources Inoperability, Revision 005
SP 2613K, Diesel Generator Slow Start Operability Test Facility 1, Revision 007
SP 2670, Saltwater Cooled HX D/P Determination, Revision 016
OP 2346A, A Emergency Diesel Generator, Revision 034
OP 2346A-002, A DG Pre-start Checklist, Revision 021
OP 2346A-004, A DG Data Sheet, Revision 024-03
SP 2613K-001, Periodic DG Slow Start Operability Test, Facility 1 (Loaded Run), Revision 005
SP 2670-004, Diesel Generator A HX D/P Determination, Revision 001-05
OP 2346A-009, A DG Air Roll, Revision 000-04
SP 2619G-002, TS 3.8.1.1.b - One EDG Inoperable, Revision 002-01
SP 2610CO, AFW System Lineup, Valve Operability and Operational Readiness Tests,
Operating, Revision 001
SP 2610CO-002, 2-FW-43A and 2-FW-43B Failure Mode and Stroke Time IST, Revision 001
SP 2610CO-001, Auxiliary Feedwater Flow Path Lineup Verification, Revision 001
SP 2402M, Functional Test of Steam Generator Level and Auto-Aux. Feedwater Initiation Logic,
Revision 011
SP 3646A.2, Emergency Diesel Generator B Operability Test, Revision 025
SP 3604A.1, Charging Pump A Operational Readiness Test, Revision 017
Work Orders
53102961788 53103053362 53103079863 53103084426
53103096824 53103104435 53103104903 53103104933
53103104942 53103108717 53103112699 53203157223
Condition Reports
1068440 1088243 1088260 1088261
1088557 1088897 1090369 1090404
1090469 1090717 1090807
Miscellaneous
ER-AA-RXE- Attachment 4, Reactivity Plan, Dated January 19, 2018
212-26933, Sheet 2, PID Service Water System, Revision 90
212-26933, Sheet 4, PID Service Water System, Revision 54
71114.06 - Drill Evaluation
Miscellaneous
EP-AA-103 Attachment 3, Classification Opportunity, for LORTSE55 on January 9, 2018
SERO Log Sheet, dated February 28, 2018
Drill Incident Response Forms
EOF Protective Action Recommendations for Drill dated February 28, 2018
Unit 3 Rehearsal Drill Objectives and Critique dated February 28, 2018
71151 - Performance Indicator Verification
Procedures
SP 3601F.6, Reactor Coolant System Water Inventory Measurement, Revision 008-00
SP 3855, Reactor Coolant Analysis for Dose Equivalent, Rev. 8
SP3670.1, Mode 1-4 Daily and Shiftly Control Room Rounds
SP 2602A, Reactor Coolant Leakage, Revision 10
C OP 200.15, RCS Leakage Trending and Investigation, Revision 3
SP 2619A, Control Room Daily Surveillance, Mode 1 & 2, Revision 56
Surveillance Test Reports
SP3855-001, Reactor Coolant Analysis for Dose Equivalent I-131, dated December 4, 2017
SP3855-001, Reactor Coolant Analysis for Dose Equivalent I-131, dated October 9, 2017
SP3855-001, Reactor Coolant Analysis for Dose Equivalent I-131, dated September 11, 2017
Miscellaneous
2017 Monthly Leakage Spreadsheet for Units 2 and 3
2017 RCS Activity Spreadsheet for Units 2 and 3
71152 - Problem Identification and Resolution
Condition Reports
570737 571897 578532 1001480
1005259 1044700 1054758 1057865
1057896 1073086 1076228 1083510
Miscellaneous
ACE 019884, Green NCV Finding 3HVK*CHL1A Chiller Trips, September 26, 2014 -
December 13, 2014, Revision 0
CA3004488, Root Cause Evaluation, CR1005259, Significant Level 2 Multiple Unit 3 A Control
Building Chiller Trips, dated September 11, 2015
ETE-MP-2017-1009, Classification of MPS Systems Using the Tiered Approach to System
Selection, Revision 0
Modification
MP3-15-01158, Chiller M33HVK*CHL 1B Bearing and Motor Module Time Delay, January 13,
2016
Work Orders
53102695494 53102906138
71153 - Follow-up of Events and Notices of Enforcement Discretion
Procedures
OP 2356, Doors, Revision 004
Condition Reports
CR1035792
Apparent Cause Evaluation #3030473 (2016)
Apparent Cause Evaluation #019415 (2013)
D.
UNITED STATES
NUCLEAR REGULATORY COMMISSION
REGION I
2100 RENAISSANCE BOULEVARD, SUITE 100
KING OF PRUSSIA, PENNSLYVANIA 19406-2713
May 3, 2018
Mr. Daniel G. Stoddard
Senior Vice President and Chief Nuclear Officer
Dominion Energy, Inc.
Innsbrook Technical Center
5000 Dominion Blvd.
Glen Allen, VA 23060-6711
SUBJECT: MILLSTONE POWER STATION - INTEGRATED INSPECTION REPORT
05000336/2018001 AND 05000423/2018001
Dear Mr. Stoddard:
On March 31, 2018, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection
at Millstone Power Station (Millstone), Units 2 and 3. On April 4, 2018, the NRC inspectors
discussed the results of this inspection with Mr. John Daugherty, Site Vice President, and other
members of your staff. The results of this inspection are documented in the enclosed report.
No NRC-identified or self-revealing findings 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 the NRC Public Document Room
in accordance with Title 10 of the Code of Federal Regulations (10 CFR), Part 2.390, Public
Inspections, Exemptions, Requests for Withholding.
Sincerely,
/RA/
Daniel
- L. Schroeder, Chief
Reactor Projects Branch 2
Division of Reactor Projects
Docket Nos. 50-336 and 50-423
License Nos. DPR-65 and NPF-49
Enclosure:
Inspection Report 05000336/2018001
and 05000423/2018001
cc w/encl: Distribution via ListServ
Non-Sensitive Publicly Available
SUNSI Review
Sensitive Non-Publicly Available
OFFICE RI/DRP RI/DRP RI/DRP
NAME JFuller via telecom TSetzer/DSchroeder for DSchroeder
DATE 5/3/18 5/3/18 5/3/18
U.S. NUCLEAR REGULATORY COMMISSION
Inspection Report
Docket Numbers: 50-336 and 50-423
License Numbers: DPR-65 and NPF-49
Report Numbers: 05000336/2018001 and 05000423/2018001
Enterprise Identifier: I-2018-001-0082
Licensee: Dominion Energy Nuclear Connecticut, Inc. (Dominion)
Facility: Millstone Power Station, Units 2 and 3
Location: P.O. Box 128
Waterford, CT 06385
Inspection Dates: January 1 to March 31, 2018
Inspectors:
- J. Fuller, Senior Resident Inspector
- L. McKown, Resident Inspector
- C. Highley, Resident Inspector
- H. Anagnostopoulos, Senior Health Physicist
- J. Brand, Reactor Inspector
Approved By: Daniel
- L. Schroeder, Chief
Reactor Projects Branch 2
Division of Reactor Projects
SUMMARY
The U.S. Nuclear Regulatory Commission (NRC) continued monitoring Dominions performance
at Millstone Units 2 and 3 by conducting the baseline inspections described in this report 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. Licensee-identified
non-cited violations are documented in report section 71153.
No findings or more-than-minor violations were identified.
Additional Tracking Items
Type Issue number Title Report Status
Section
LER 05000336/2016-001-00 Turbine Driven Auxiliary 71153 Closed
Feedwater Pump Room
HELB Door Left Open
PLANT STATUS
Unit 2 and 3 operated at or near rated thermal power for the entire 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 Dominion Energys performance and
compliance with Commission rules and regulations, license conditions, site procedures, and
standards.
REACTOR SAFETY
71111.01 - Adverse Weather Protection
Impending Severe Weather (2 Samples)
The inspectors evaluated readiness for impending adverse weather conditions for the onset
of a severe storm with heavy snow and high winds on January 3, 2018.
The inspectors evaluated readiness for impending adverse weather conditions for a winter
storm watch on March 6, 2018.
71111.04 - Equipment Alignment
Partial Walkdown (5 Samples)
The inspectors evaluated system configurations during partial walkdowns of the following
systems/trains at Unit 3:
(1) B emergency diesel generator (EDG) air start system on January 22, 2018
(2) Charging system with both 'A' and 'B' pumps in service on January 31, 2018
(3) Control building chiller service water booster pump trains on February 6, 2018
(4) Auxiliary feedwater injection lines on February 12, 2018
(5) 'A' steam generator feedwater regulating bypass valve operator and control circuit on
March 27, 2018
71111.05A/Q - Fire Protection Annual/Quarterly
Quarterly Inspection (7 Samples)
The inspectors evaluated fire protection program implementation in the following selected
areas:
Unit 2
(1) Fire areas T-3 (motor driven auxiliary feedwater pump room) and T-4 (steam driven
auxiliary feedwater pump room) on January 24, 2018
(2) Fire area A-21, west direct current switchgear room on January 26, 2018
(3) Fire area A-15 and A-16, A and B EDG rooms on February 2, 2018
(4) Fire area T-10, upper vital switchgear room on February 8, 2018
Unit 3
(5) Fire area ESF-5, SE floor area auxiliary feed pump cubicle [216] on January 10, 2018
(6) Fire area CB-8, cable spreading area on January 23, 2018
(7) Fire area FB-1, fuel building elevation 11' pipe chase / pipe tunnel pit on January 29,
2018
71111.06 - Flood Protection Measures
Cables (1 Sample)
The inspectors evaluated cable submergence protection in:
(1) Unit 3 north and south cable tunnels on January 23, 2018
71111.11 - Licensed Operator Requalification Program and Licensed Operator Performance
Operator Requalification (2 Samples)
The inspectors observed and evaluated Unit 2 operator requalification training on reactor
coolant system (RCS) leak (AOP-2568), reactor coolant pump malfunctions (AOP-2586),
rapid downpower (AOP-2575), immediate operator actions (AOP-2585), reactor trip (EOP-
25), reactor trip recovery (EOP-2526), RCS leak rate calculation, condensate pump trips,
heater drain pump trips, and feed water heater tube leak on February 6, 2018.
The inspectors observed and evaluated Unit 3 control room simulator licensed operator
requalification training including a small break loss of coolant accident, rapid downpower,
and nuclear instrument failure, and verified completion of risk significant operator actions,
including the use of alarm response, abnormal, and emergency operating procedures on
February 13, 2018
Operator Performance (2 Samples)
The inspectors observed Unit 2 operator performance on plant downpower, turbine valve
testing, annunciator response procedure usage for various turbine control alarms, and control
room rounds on January 19, 2018.
The inspectors observed Unit 3 operator performance during 'B' EDG endurance
surveillance testing, emergency generator logic sequencer auto test failure and manual re-
test, failure and restoration of power range channel 41, and a medical emergency on
February 20, 2018.
71111.12 - Maintenance Effectiveness
Routine Maintenance Effectiveness (6 Samples)
The inspectors evaluated the effectiveness of routine maintenance activities associated
with the following equipment and/or safety significant functions:
Unit 2
(1) B direct current switchgear room chiller (Vital Chiller) maintenance on January 23, 2018
(2) Radiation monitor failures on February 1, 2018
Unit 3
(3) 'B' EDG air start system on January 22, 2018
(4) Charging pump seal leakage on January 31, 2018
(5) Control building chiller service water booster pump trains on February 6, 2018
(6) Auxiliary feed water injection lines on February 12, 2018
71111.13 - Maintenance Risk Assessments and Emergent Work Control (8 Samples)
The inspectors evaluated the risk assessments for the following planned and emergent
work activities:
Unit 2
(1) B EDG inoperable due to low oil temperature increased risk associated with other
scheduled work on January 12, 2018
(2) Elevated risk due to charging and letdown outage required to perform replacement and
calibration of M2LY-110Q, I to P converter, on January 18, 2018
(3) Functional testing of the steam generator level and auto auxiliary feedwater initiation
logic potential Yellow risk window on February 12, 2018
(4) Auxiliary feedwater testing with potential for causing a Yellow risk window on
February 13, 2018
Unit 3
(5) 'A' turbine driven feed pump overspeed trip push button restoration on January 31, 2018
(6) Offsite line 310 outage concurrent with deep downpower first contingency to support
offsite grid maintenance on February 9, 2018
(7) Procedurally controlled high risk plan for the manual performance of 'B' train emergency
generator logic sequencer testing on February 20, 2018
(8) Line 348 outage and single output breaker operation on March 29, 2018
71111.15 - Operability Determinations and Functionality Assessments (8 Samples)
The inspectors evaluated the following operability determinations and functionality
assessments:
Unit 2
(1) CR1078830 - through wall leakage in emergency core cooling system recirculation
piping to refueling water storage tank on January 12, 2018
(2) B EDG keep warm pump relay failure for oil temperatures on January 16, 2018
(3) Channel C reactor protection system pre-trip light on January 24, 2018
(4) Indication of possible over power condition due to leading edge flow meter and total
venturi flow mismatch on January 30, 2018
Unit 3
(5) Reactor plant chilled water system containment isolation valves possible inadequate
closing force operability determination and six month periodic review on January 11,
2018
(6) CR1087819 - steam generator back leakage into auxiliary feedwater on January 11,
2018
(7) CR1088497 - 'B' EDG air start system on January 22, 2018
(8) CR1090807 - additional purging performed during monthly A EDG fuel oil storage tank
dewatering on February 27, 2018
71111.18 - Plant Modifications (1 Sample)
The inspectors evaluated the following temporary modification:
(1) Unit 3 alternate plant configuration (temporary modification) of charging 'A' and 'C'
pumps to support 'A' seal troubleshooting on February 26, 2018
71111.19 - Post Maintenance Testing (11 Samples)
The inspectors evaluated post maintenance testing for the following maintenance/repair
activities:
Unit 2
(1) Shim switch failure on January 11, 2018
(2) B EDG keep warm pump relay failure on January 16, 2018
(3) M2LY-110Q, I to P converter associated with chemical and volume control system, on
January 18, 2018
(4) B train control room air conditioning unit 2A instrumentation calibration (removal and
installation) and compressor inspection on January 22, 2018
(5) B direct current switchgear room chiller (Vital chiller) after failure to start on January 24,
2018
(6) Replacement of SI-647 relay (high pressure safety injection isolation valve) on
February 12, 2018
Unit 3
(7) Normal station service transformer to bus 34B seismic door replacement on January 23,
2018
(8) B' EDG air compressors following troubleshooting and maintenance associated with
inability to restore starting air flasks to normal standby pressure on January 23, 2018
(9) 'D' steam generator level instrument bistable card on February 9, 2018
(10) Power range nuclear instrument channel 41 power supply failure and restoration on
February 20, 2018
(11) 'A' wide range containment sump level indication troubleshooting and calibration on
February 21, 2018
71111.22 - Surveillance Testing
The inspectors evaluated the following surveillance tests:
Routine (8 Samples)
(1) Unit 2 A EDG monthly surveillances with a slow start on January 3, 2018
(2) Unit 2 main control valve, main stop valve, and combined intermediate valve operability
test on January 19, 2018
(3) Unit 2 functional test of S/G level and auto auxiliary feedwater initiation logic on
February 12, 2018
(4) Unit 2 auxiliary feedwater valve testing on February 13, 2018
(5) Unit 3 auxiliary feedwater pump 3FWA*P2 operational readiness test on January 10,
2018
(6) Unit 3 SP 3612B.5, Primary Coolant Leakage Outside Containment - Summary Sheet
on January 31, 2018
(7) Unit 3 SP 3646A.2-006, Emergency Diesel Generator B 24 Hour Run and Restart,
Revision 002, performed February 20-21, 2018
(8) Unit 3 C SP 600.5, QA Diesel Fuel Oil Delivery Post - Offload Results on February 28,
2018
Inservice (2 Samples)
(1) Unit 2 turbine driven auxiliary feedwater pump quarterly operational testing, MS-V201,
V202, and V464 valve stroke and timing tests on January 24, 2018
(2) Unit 3 SP 3626.10-001, motor control center and rod control booster pump 3SWP*P3A
group B test on February 7, 2018
71114.06 - Drill Evaluation
Emergency Planning Drill (1 Sample)
The inspectors evaluated the conduct of a routine Unit 3 emergency planning drill on
February 28, 2018.
Drill/Training Evolution (1 Sample)
The inspectors evaluated licensed operator requalification training, including a drill and
exercise performance classification opportunity, at Unit 3 on January 9, 2018.
RADIATION SAFETY
71124.02 - Occupational As Low As Reasonably Achievable (ALARA) Planning and Controls
Radiological Work Planning (1 Sample)
The inspectors evaluated Dominions radiological work planning by reviewing the following
activities:
(1) ALARA Plan AP-2-17-01
(2) ALARA Plan AP-2-17-02
(3) ALARA Plan AP-2-17-13
(4) ALARA Plan AP-3-17-03
(5) ALARA Plan AP-3-17-11
(6) ALARA Plan AP-3-18-01
Verification of Dose Estimates and Exposure Tracking Systems (1 Sample)
The inspectors reviewed the current annual collective dose estimate; basis methodology;
and measures to track, trend, and reduce occupational doses for ongoing work activities.
The inspectors evaluated the adjustment of exposure estimates or replanning of work. The
inspectors reviewed post-job ALARA evaluations.
OTHER ACTIVITIES - BASELINE
71151 - Performance Indicator Verification
The inspectors verified licensee performance indicators submittals listed below for the
period from January 2017 through December 2017. (4 Samples)
Unit 2
(1) RCS specific activity
(2) RCS identified leak rate
Unit 3
(3) RCS specific activity
(4) RCS identified leak rate
71152 - Problem Identification and Resolution
Annual Follow-up of Selected Issue (1 Sample)
The inspectors reviewed the licensees implementation of its corrective action program
related to the following issue:
(1) Continued failures (trips) of the Unit 3 control building chillers (nine failures of the A
chiller and three failures of the B chiller) since implementation of corrective actions for
multiple failures of the Unit 3 A chiller in 2014.
71153 - Follow-up of Events and Notices of Enforcement Discretion
Licensee Event Reports (1 Sample)
The inspectors evaluated the following licensee event reports which can be accessed at
https://lersearch.inl.gov/LERSearchCriteria.aspx:
(1) Licensee Event Report (LER) 2016-001-00, Turbine Driven Auxiliary Feedwater
Pump Room HELB [High Energy Line Break] Door Left Open on April 27, 2016.
INSPECTION RESULTS
Observations 71152
Annual Follow-up of Selected Issues
The inspectors assessed Dominions problem identification threshold, assessment and
operability determinations for each of the identified issues, maintenance rule applicability,
extent of condition reviews, and the prioritization and timeliness of corrective actions to
determine whether Dominion staff was appropriately identifying, characterizing, and correcting
problems associated with the chillers and whether the corrective actions were appropriate.
The prior failures in 2014 involved a failed card, several loose and/or broken connections and
an unexpected loose soldered connection (vice crimped), and spurious electrical signal spikes
on the bearing temperature module. The inspectors determined these conditions have not
recurred; and the subsequent failures have been properly evaluated and adequate corrective
actions have been completed and/or planned. Specifically, for each of the chiller failures
since 2014, Dominion conducted the appropriate level of cause evaluation and properly
identified and implemented appropriate applicable corrective actions. Included in these
corrective actions were developing modifications for both chillers to prevent spurious electrical
signal spike trips and for replacing the existing electromechanical timers with solid state
timers. Dominion also reviewed preventive maintenance activities and adjusted specific
activity frequencies to enhance the service life of the components.
Licensee Event Turbine Driven Auxiliary Feedwater Pump Room HELB 71153
Report (Closed) [High Energy Line Break] Door Left Open on April 27, 2016
LER 2016-001-00
Description: On April 27, 2016, with Millstone Power Station Unit 2 in MODE 1 at 100%
power, plant personnel inadvertently left the door to the turbine driven auxiliary feed purnp
room open. This condition existed for less than one hour. The door is a high energy line
break (HELB) barrier. With the door open there was no HELB protection for the motor driven
auxiliary feedwater pumps thus potentially rendering both trains of auxiliary feedwater
inoperable. The licensee determined that the cause was human performance error. The door
is conspicuously labeled on each side that it is a HELB boundary door and must be closed
except for entry and exit from the room. Corrective actions were taken in accordance with the
station's corrective action program, and condition report 1035792 was initiated to address this
issue.
Closure Basis: The inspectors determined that Dominion's immediate actions to close the
HELB door and subsequent corrective actions that created a computer based training,
assigned to current and future contractor personnel, to reinforce the requirements associated
with HELB doors were adequate. The inspectors determined that the failure to close and
latch the HELB door represented a Green licensee identified violation of 10 CFR Part 50,
Appendix B, Criterion V. This Green licensee identified violation is documented under
Inspection Results in Millstone's IR2018001. The inspectors did not identify any new issues
during the review of the LER. This LER is closed.
Licensee Identified Non-Cited Violation 71153
This violation of very low safety significant was identified by the licensee and has been
entered into the licensees corrective action program and is being treated as a non-cited
violation, consistent with Section 2.3.2 of the Enforcement Policy.
Violation: 10 CFR Part 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings,
requires that activities affecting quality shall be prescribed by documented instructions,
procedures, or drawings, of a type appropriate to the circumstances and shall be
accomplished in accordance with these instructions, procedures, or drawings.
Section 4.4 of Operating Procedure 2356, Doors, Revision 004, states in part, site
personnel are responsible for ensuring doors [high energy line break boundary doors] are
closed and latched after passage.
Contrary to the above, between 7:10 pm and 8:07 pm on April 27, 2016, with Millstone Unit 2
in Mode 1 at 100 percent power, Dominion personnel failed close and latch the HELB barrier
door between the steam driven and motor driven auxiliary feedwater pumps, which rendered
both trains of auxiliary feedwater inoperable for approximately 57 minutes.
Significance/Severity Level: The inspectors evaluated this finding using IMC 0609.04, Initial
Characterization of Findings, and IMC 0609, Appendix A, Exhibit 2, Mitigating Systems
Screening Questions. The inspectors determined that the finding was of very low safety
significance (Green).
Corrective Action Reference: CR 1035792
EXIT MEETINGS AND DEBRIEFS
The inspectors verified no proprietary information was retained or documented in this report.
On April 4, 2018, the inspectors presented the quarterly resident inspector inspection results
to Mr. John Daugherty, Site Vice President, and other members of the Millstone staff.
DOCUMENTS REVIEWED
71111.01 - Adverse Weather Protection
Miscellaneous
Surveillance Form SP 3665.2-001, Intake Structure Condition Determination with Vacuum in
Condenser, dated March 6, 2018
Surveillance Form SP 2654R-001, Intake Structure Condition Determination (With Vacuum in
Condenser), dated March 6, 2018
71111.04 - Equipment Alignment
Procedures
OP 3304A, Charging and Letdown
SP 3604A.1, Charging Pump A Operational Readiness Test, Revision 017
SP 3612B.5, Primary Coolant Leakage Outside Containment - Summary Sheet, Revision 001-
01, performed January 31, 2018
SP 3604A.1, Charging Pump A Leaktightness Verification Check, Revision 005-04, performed
January 31, 2018
SP 3626.10-001, Motor Control Center and Rod Control Booster Pump 3SWP*P3A Group B
Test, Revision 012-01
Condition Reports
CA3100943 CA3114923 1068440 1087819
1088497 1088897 1090041 1090044
1090717
Maintenance Orders/Work Orders
53103053362 53103079863 53103084426 53103104435
53103108717 53203153366
Miscellaneous
212-26916, Sheet 4, PID B Emergency Diesel Generator Air Start System, Revision 20
3C19-CHS01-0002, Alternate Plant Configuration for Isolation of A Charging Pump due to Seal
Leakage
212-26904, Sheet 1, PID Charging and Letdown System, Revision 54
212-26933, Sheet 2, PID Service Water System, Revision 90
212-26933, Sheet 4, PID Service Water System, Revision 54
212-26930, Sheet 2, PID B Auxiliary Feedwater System, Revision 49
212-26930, Sheet 3, PID Feed Water System, Revision 30
71111.05 - Fire Protection
Procedures
MP-PROC-ENG-U3-24-FFS-BAP01-ESF-MAP, Revision 0
Millstone Unit 2 Fire Fighting Strategy for Fire Areas: T-10, 13, and 14
Miscellaneous
U3-24-FFS, Millstone Unit 3 Fire Fighting Strategies, Revision 0
Millstone Unit 3 Fire Protection Evaluation Report, Revision 21.3
71111.06 - Flood Protection Measures
Condition Reports
CA277474 1087853
Miscellaneous
ETE-MP-2015-1057, Condition Monitoring of Structures, Revision 0
71111.11 - Licensed Operator Requalification Program
Procedures
SP 2651M, Combined Intermediate Valves Operability Test, Revision 005
SP 2651L, Main Stop Valve Operability Test, Revision 004-01
SP 2651N, Main Control Valve Operability Test, Revision 007
OP 2204, Load Changes, Revision 038
SP 2651L-002, Quarterly Main Stop Valve Operability Test, Revision 002
SP 2651M-002, Combined Intermediate Valves Operability Test, Revision 002
SP 2651N-001, Main Control Operability Test, Revision 003-01
AOP 2585, Immediate Operator Actions, Revision 003-00
AOP 2568, Reactor Coolant System Leak, Revision 016
AOP 2575, Rapid Down Power, Revision 010-00
EOP 2526, Reactor Trip Recovery, Revision 019-00
EOP 2525, Standard Post Trip Action, Revision 028-00
AOP 2586, RCP Malfunctions, Revision 004
SP 3448E41, Train B - Diesel Sequencer Actuation Logic Test, Revision 006-01
SP 3646A.2, Emergency Diesel Generator B Operability Test, Revision 025
Work Orders
53102961788 53103112699 53203157223
Condition Reports
1088243 1088260 1088261 1090369
1090404 1090469
Miscellaneous
ER-AA-RXE- Attachment 4, Reactivity Plan, Dated January 19, 2018
LORP program # S18103, Simulator Exercise Guide Minimum manning/Secondary Malfunctions
course # 70260
LORP program # S18102, Simulator Exercise Guide RCS Leak AOP-2568 course # 70160
71111.12 - Maintenance Effectiveness
Procedures
SP 3626.10-001, Motor Control Center and Rod Control Booster Pump 3SWP*P3A Group B
Test, Revision 012-01
SP 3604A.1, Charging Pump A Operational Readiness Test, Revision 017
Work Orders
53102987484 53103053362 53103079863 53103084426
53103104183 53103104435 53103108717 53203153366
Condition Reports
CA3064516 CA3040023 CA3114923 CA3100943
1068440 1087819 1088497 1088897
1090041 1090044 1090717
Miscellaneous
Failure report number 361 for 'B DC SWGR room chiller, dated March 21, 2002
Radiation monitors Maintenance Rule Evaluations (MRE) Unit 2, since January 1 2016
212-26933, Sheet 2, PID Service Water System, Revision 90
212-26933, Sheet 4, PID Service Water System, Revision 54
3C19-CHS01-0002, Alternate Plant Configuration for Isolation of A Charging Pump due to Seal
Leakage
212-26904, Sheet 1, PID Charging and Letdown System, Revision 54
212-26916, Sheet 4, PID B Emergency Diesel Generator Air Start System, Revision 20
212-26930, Sheet 2, PID B Auxiliary Feedwater System, Revision 49
71111.13 - Maintenance Risk Assessments and Emergent Work Control
Procedures
IC2418D1, Setting Letdown Limiter LLM - 110 High and Low Limit Setpoints, Revision 001-03
C IC 400.05-002, Instrument/Loop Calibration Testing Guidelines, dated January 14, 2013
SP 2610CO, AFW system lineup, valve operability and operational readiness tests, operating,
Revision 001
SP 2610CO-002, 2-FW-43A and 2-FW-43B Failure mode and stroke time IST, Revision 001
SP 2610CO-001, Auxiliary feedwater flow path lineup verification, Revision 001
SP 2402M, Functional test of steam generator level and auto-aux. feedwater initiation logic,
Revision 011
SP 3621.4, Main Feedwater Turbine Emergency Governor and Trip Lockout Test, Revision 001
SP 3448E41, Train B - Diesel Sequencer Actuation Logic Test, Revision 006-01
Condition Reports
1086031 1090369 1090404 1090469
Work Orders
53102961788 53103112699 53203149868 53203157223
Miscellaneous
Medium Risk Plan for CR1086138 dated January 17, 2018
Operator risk report unit 2 dated February 13, 2018
Operator risk report unit 2 dated February 12, 2018
WO# TMC80101
EOOS Version 4.1 for Millstone Unit 3 on February 9, 2018
EOOS Version 4.1 for Millstone Unit 3 on March 29, 2018
High Risk Plan, Eversource TOA 18-00852 and 18-00768
EOOS Version 4.1 for Millstone Unit 3 on January 31, 2018
EOOS Version 4.1 for Millstone Unit 3 on February 20, 2018
71111.15 - Operability Determinations and Functionality Assessments
Procedures
ER-M2-THM-201 attachment 1, Feed flow correction factor determination, Revision 0
ER-M2-THM-201, Determining feed flow correction factors for MP Unit 2, Revision 0
EN 21002, Core Heat Balance, Revision 017
SP 2601D-001, Power range channel and delta T power channel calibration, Revision 016-01
C SP 600.5, QA Diesel Fuel Oil Delivery Post - Offload Results, Revision 003, performed
February 28, 2018
Condition Reports
CA3061625 CA3114923 CA3100943 1078830
1087718 1087785 1087819 1088497
1088558 1088839 1089030 1090041
1090044 1090807
Maintenance Orders/Work Orders
203152143 53203153366
Miscellaneous
Periodic review of OD CR1073242/CA3061625 dated January 11, 2018
Prompt operability determination documentation for CR1073242 dated July 14, 2017
P&ID 6822-34868A, Reactor Protective System Bistable Trip Unit Schematic, Revision dated
December 1, 2004
Unit 2 Control room narrative logs, dated January 25, 2018
Unit 2 Control room narrative logs, dated March 2, 2018
Unit 2 Control room narrative logs, dated February 5-8, 2018
Unit 2 Control room narrative logs, dated January 30, 2018
212-26916, Sheet 4, PID B Emergency Diesel Generator Air Start System, Revision 20
ETE-MP-2017-1144, Code Case N-513-3 Limit Load Planer Flaw Evaluation on Line 6-HCD-3,
Return to RWST, Revision 0
203-26015, PID
- L.P. Safety Injection System, Revision 50
71111.18 - Plant Modifications
Procedures
SP 3612B.5, Primary Coolant Leakage Outside Containment - Summary Sheet, Revision 001-
01, performed January 31, 2018
SP 3604A.1, Charging Pump A Leaktightness Verification Check, Revision 005-04, performed
January 31, 2018
Condition Reports
1088897 1090717
Miscellaneous
3C19-CHS01-0002, Alternate Plant Configuration for Isolation of A Charging Pump due to Seal
Leakage
212-26904, Sheet 1, PID Charging and Letdown System, Revision 54
71111.19 - Post-Maintenance Testing
Procedures
SP 3447B01A-001R, Containment Sump Wide Range Level Rack Channel Calibration Train A,
Revision 000, performed February 12, 2018
SP 3441A10, Power Range Neutron Flux Monitor 41 Channel Calibration, Revision 004
Condition Reports
CA3114923 565360 1087675 1087718
1088410 1088418 1088497 1089726
1089754 1089767 1090369 1090404
Maintenance Orders/Work Orders
53102748541 53102756227 53102916491 53102987484
53103104183 53103123688 53203149868 53203152142
203152143 53203153366 53203156607 53203156690
203156704 53203157223
Miscellaneous
Trouble shooting plan for CR 1087675 M2 Control Element Drive System (CEDS), dated
January 11, 2018
Failure report number 361 for B DC SWGR room chiller, dated March 21, 2002
P&ID 25203-39045 SH 78, Rear Panel Wiring Diagram Engineered Safeguards Section CO-1,
Revision 17
212-26916, Sheet 4, PID B Emergency Diesel Generator Air Start System, Revision 20
71111.22 - Surveillance Testing
Procedures
SP 2610BO-004, Auxiliary Feedwater Pump Turbine Trip Throttle Valve Exercise Test, Revision
2
SP 2610BO-002, Turbine Driven Auxiliary Feedwater Pump and Recirculation Check Valve In-
Service Inspection Testing (IST), Revision 002
SP 2610BO-001, 2-MS-201, 2-MS-202, and 2-MS-464 (SV-4188) Stroke and Timing In-Service
Inspection Testing (IST), Revision 002
SP 2651M, Combined Intermediate Valves Operability Test, Revision 005
SP 2651L, Main Stop Valve Operability Test, Revision 004-01
SP 2651N, Main Control Valve Operability Test, Revision 007
OP 2204, Load Changes, Revision 038
ER-AA-RXE- Attachment 4, Reactivity Plan, Dated January 19, 2018
SP 2651L-002, Quarterly Main Stop Valve Operability Test, Revision 002
SP 2651M-002, Combined Intermediate Valves Operability Test, Revision 002
SP 2651N-001, Main Control Operability Test, Revision 003-01
CM-M2-STI-101, Millstone Unit 2 Technical Specification Surveillance Test Interval (STI0 List,
Revision 7
SP 3622.3, Auxiliary Feedwater Pump 3FWA*P2 Operational Readiness Test, Revision 027
SP 3622.3-001 Surveillance Form - TDAFW Pump Operational Readiness and Quarterly IST
Group B Pump Tests, dated January 10, 2018
SP 2619G, AC Electrical Sources Inoperability, Revision 005
SP 2613K, Diesel Generator Slow Start Operability Test Facility 1, Revision 007
SP 2670, Saltwater Cooled HX D/P Determination, Revision 016
OP 2346A, A Emergency Diesel Generator, Revision 034
OP 2346A-002, A DG Pre-start Checklist, Revision 021
OP 2346A-004, A DG Data Sheet, Revision 024-03
SP 2613K-001, Periodic DG Slow Start Operability Test, Facility 1 (Loaded Run), Revision 005
SP 2670-004, Diesel Generator A HX D/P Determination, Revision 001-05
OP 2346A-009, A DG Air Roll, Revision 000-04
SP 2619G-002, TS 3.8.1.1.b - One EDG Inoperable, Revision 002-01
SP 2610CO, AFW System Lineup, Valve Operability and Operational Readiness Tests,
Operating, Revision 001
SP 2610CO-002, 2-FW-43A and 2-FW-43B Failure Mode and Stroke Time IST, Revision 001
SP 2610CO-001, Auxiliary Feedwater Flow Path Lineup Verification, Revision 001
SP 2402M, Functional Test of Steam Generator Level and Auto-Aux. Feedwater Initiation Logic,
Revision 011
SP 3646A.2, Emergency Diesel Generator B Operability Test, Revision 025
SP 3604A.1, Charging Pump A Operational Readiness Test, Revision 017
Work Orders
53102961788 53103053362 53103079863 53103084426
53103096824 53103104435 53103104903 53103104933
53103104942 53103108717 53103112699 53203157223
Condition Reports
1068440 1088243 1088260 1088261
1088557 1088897 1090369 1090404
1090469 1090717 1090807
Miscellaneous
ER-AA-RXE- Attachment 4, Reactivity Plan, Dated January 19, 2018
212-26933, Sheet 2, PID Service Water System, Revision 90
212-26933, Sheet 4, PID Service Water System, Revision 54
71114.06 - Drill Evaluation
Miscellaneous
EP-AA-103 Attachment 3, Classification Opportunity, for LORTSE55 on January 9, 2018
SERO Log Sheet, dated February 28, 2018
Drill Incident Response Forms
EOF Protective Action Recommendations for Drill dated February 28, 2018
Unit 3 Rehearsal Drill Objectives and Critique dated February 28, 2018
71151 - Performance Indicator Verification
Procedures
SP 3601F.6, Reactor Coolant System Water Inventory Measurement, Revision 008-00
SP 3855, Reactor Coolant Analysis for Dose Equivalent, Rev. 8
SP3670.1, Mode 1-4 Daily and Shiftly Control Room Rounds
SP 2602A, Reactor Coolant Leakage, Revision 10
C OP 200.15, RCS Leakage Trending and Investigation, Revision 3
SP 2619A, Control Room Daily Surveillance, Mode 1 & 2, Revision 56
Surveillance Test Reports
SP3855-001, Reactor Coolant Analysis for Dose Equivalent I-131, dated December 4, 2017
SP3855-001, Reactor Coolant Analysis for Dose Equivalent I-131, dated October 9, 2017
SP3855-001, Reactor Coolant Analysis for Dose Equivalent I-131, dated September 11, 2017
Miscellaneous
2017 Monthly Leakage Spreadsheet for Units 2 and 3
2017 RCS Activity Spreadsheet for Units 2 and 3
71152 - Problem Identification and Resolution
Condition Reports
570737 571897 578532 1001480
1005259 1044700 1054758 1057865
1057896 1073086 1076228 1083510
Miscellaneous
ACE 019884, Green NCV Finding 3HVK*CHL1A Chiller Trips, September 26, 2014 -
December 13, 2014, Revision 0
CA3004488, Root Cause Evaluation, CR1005259, Significant Level 2 Multiple Unit 3 A Control
Building Chiller Trips, dated September 11, 2015
ETE-MP-2017-1009, Classification of MPS Systems Using the Tiered Approach to System
Selection, Revision 0
Modification
MP3-15-01158, Chiller M33HVK*CHL 1B Bearing and Motor Module Time Delay, January 13,
2016
Work Orders
53102695494 53102906138
71153 - Follow-up of Events and Notices of Enforcement Discretion
Procedures
OP 2356, Doors, Revision 004
Condition Reports
CR1035792
Apparent Cause Evaluation #3030473 (2016)
Apparent Cause Evaluation #019415 (2013)