IR 05000317/2019003

Integrated Inspection Report 05000317/2019003 and 05000318/2019003 and Independent Spent Fuel Storage Installation (ISFSI) Report 07200008/2019001

ML19316B501
Person / Time
Site:	Calvert Cliffs
Issue date:	11/12/2019
From:	Matt Young NRC/RGN-I/DRP/PB5
To:	Bryan Hanson Exelon Generation Co, Exelon Nuclear
References
IR 2019001, IR 2019003
Download: ML19316B501 (12)

Text

{{#Wiki_filter:ber 12, 2019

SUBJECT:

CALVERT CLIFFS NUCLEAR POWER PLANT, UNITS 1 AND 2 - INTEGRATED INSPECTION REPORT 05000317/2019003 AND 05000318/2019003 AND INDEPENDENT SPENT FUEL STORAGE INSTALLATION (ISFSI) REPORT 07200008/2019001

Dear Mr. Hanson:

On September 30, 2019, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Calvert Cliffs Nuclear Power Plant, Units 1 and 2. On October 23, 2019, the NRC inspectors discussed the results of this inspection with Mr. Mark Flaherty and other members of your staff. The results of this inspection are documented in the enclosed report.

The NRC inspectors did not identify any finding or violation 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/ Matthew R. Young, Chief Reactor Projects Branch 5 Division of Reactor Projects Docket Nos. 05000317, 05000318 07200008 License Nos. DPR-53 and DPR-69

Enclosure:

As stated

Inspection Report

Docket Numbers: 05000317, 05000318 and 07200008 License Numbers: DPR-53 and DPR-69 Report Numbers: 05000317/2019003, 05000318/2019003 and 07200008/2019001 Enterprise Identifier: I-2019-003-0035 I-2019-001-0072 Licensee: Exelon Generation Company, LLC Facility: Calvert Cliffs Nuclear Power Plant, Units 1 and 2 Location: Lusby, MD Inspection Dates: July 01, 2019 to September 30, 2019 Inspectors: H. Anagnostopoulos, Senior Health Physicist R. Clagg, Senior Resident Inspector L. Dumont, Reactor Inspector J. Nicholson, Senior Health Physicist C. Roettgen, Resident Inspector Approved By: Matthew R. Young, Chief Reactor Projects Branch 5 Division of Reactor Projects Enclosure

SUMMARY

The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting an integrated inspection at Calvert Cliffs Nuclear Power Plant, Units 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.

PLANT STATUS

Unit 1 began the inspection period at rated thermal power. On August 4, 2019, the unit was down powered to 78 percent to support main condenser water box cleaning. The unit was returned to rated thermal power on August 5, 2019, and remained at or near rated thermal power for the remainder of the inspection period.

Unit 2 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 licensee performance and compliance with Commission rules and regulations, license conditions, site procedures, and standards.

71111.01 - Adverse Weather Protection External Flooding Sample (IP Section 03.04)

(1) The inspectors evaluated readiness to cope with external flooding for Units 1 and 2, intake structure, auxiliary building roof drains, and protected area storm drains on August 20, 2019.

71111.04Q - Equipment Alignment Partial Walkdown Sample (IP Section 03.01)

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

(1) 11 and 12 turbine driven auxiliary feedwater trains, July 26, 2019

(2) 21 and 22 saltwater pumps during 23 saltwater pump out of service for maintenance, August 6, 2019

(3) 22 and 23 service water pumps during 21 service water pump out of service for maintenance, August 8, 2019

71111.04S - Equipment Alignment Complete Walkdown Sample (IP Section 03.02)

(1) The inspectors evaluated system configurations during a complete walkdown of the accessible portions of the diesel fuel oil system on August 17, 2019.

71111.05Q - Fire Protection Quarterly Inspection (IP Section 03.01)

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

(1) 11-13 and 22-23 charging pump rooms, fire areas 5-7 and 8-9, July 2, 2019

(2) Units 1 and 2, 27' switchgear rooms and purge air rooms, fire areas 18, 18A, 19 and 19A, July 12, 2019

(3) Intake structure, intake structure outside and intake structure pump room, fire area IS, August 8, 2019

(4) 1A emergency diesel generator building, fire area EDG1A, August 8, 2019

(5) 0C diesel generator building, fire area EDG0C, August 8, 2019

71111.06 - Flood Protection Measures Inspection Activities - Internal Flooding (IP Section 02.02a.)

The inspectors evaluated internal flooding mitigation protections in the:

(1) Unit 2, auxiliary feedwater pump room, July 24, 2019

71111.07A - Heat Sink Performance Annual Review (IP Section 02.01)

The inspectors evaluated readiness and performance of:

(1) 11A/11B service water heat exchanger, August 19, 2019

(2) 21A/21B service water heat exchanger, August 21, 2019

==71111.11Q - Licensed Operator Requalification Program and Licensed Operator Performance Licensed Operator Performance in the Actual Plant/Main Control Room (IP Section 03.01) (1 Sample)

(1) The inspectors observed and evaluated licensed operator performance in the control room during reactivity manipulations and routine surveillances on September 24, 2019.

Licensed Operator Requalification Training/Examinations (IP Section 03.02)==

(1) The inspectors observed and evaluated a training event involving a loss of cavity cooling, a loss of a nuclear instrument, and a cyber attack which resulted in an extended loss of all AC power; resulting in the declaration of a General Emergency on August 20, 2019.

71111.12 - Maintenance Effectiveness Routine Maintenance Effectiveness Inspection (IP Section 02.01)

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

(1) Revision of (a)(1) action plan for switchgear heating, ventilation, and air conditioning, CA-2-032-01, September 13, 2019

(2) AR04253313, perform (A)(1) determination for 1B emergency diesel generator heating, ventilation, and air conditioning, September 19, 2019

71111.13 - Maintenance Risk Assessments and Emergent Work Control Risk Assessment and Management Sample (IP Section 03.01)

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

(1) Unit 1, Yellow risk condition during 11 component cooling heat exchanger out of service for maintenance, August 29, 2019

(2) Units 1 and 2, maintenance risk assessment for the week of September 2, 2019

(3) Units 1 and 2, maintenance risk assessment for the week of September 9, 2019

(4) Units 1 and 2, maintenance risk assessment for the week of September 16, 2019

71111.15 - Operability Determinations and Functionality Assessments Operability Determination or Functionality Assessment (IP Section 02.02)

The inspectors evaluated the following operability determinations and functionality assessments:

(1) AR04260785, oil leak on 21 service water pump inboard bearing, July 1, 2019

(2) AR04262961, 1CV3823, 11 component cooling heat exchanger temperature control bypass, remains open at higher than expected system temperature, August 18, 2019

(3) AR04273390, 2BPS311, L27BT002, fire barrier, operable but in need of repair, August 21, 2019

(4) AR04274805, Unit 1 reserve battery discharge testing capacity difference, August 26, 2019

(5) AR04273394, 2BPS302, L27BS005, fire barrier, operable but in need of repair, August 27, 2019

(6) AR04273393, 2BPS311, LT27BT007, fire barrier, operable but in need of repair, August 28, 2019

(7) AR04274780, 21 auxiliary feedwater pump has slight leak on governor cooler outlet piping union, August 28, 2019

(8) AR04276467, 1B emergency diesel generator failed to air bar per Operating Instruction-21B-1, September 4, 2019

(9) AR04218179, check valve 2ADSA110, diesel starting air receiver inlet check valve, failed test criteria, September 6, 2019

(10) AR04280446, 2CV5150, service water heat exchanger saltwater inlet control valve, did not fully strike during STP-O-65N-2, September 19, 2019

==71111.18 - Plant Modifications Temporary Modifications and/or Permanent Modifications (IP Section 03.01 and/or 03.02) (2 Samples) The inspectors evaluated the following temporary or permanent modifications:

(1) Engineering Change Package-18-000497, remove insulation on 2B emergency diesel generator north exhaust header, September 3, 2019

(2) Engineering Change Package-17-000417, Unit 2 reactor coolant pump oil level instrumentation, September 19, 2019

71111.19 - Post-Maintenance Testing Post-Maintenance Test Sample (IP Section 03.01)

[[IP sample::=

=IP 71111.18|count=5}}

The inspectors evaluated the following post maintenance tests:

(1) WO C93673242, lubricate 23 saltwater pump, August 9, 2019

(2) WO C93675776, lubricate 21 charging pump motor, August 28, 2019

(3) WO C120053080, clean inlet head and tube sheet 11 component cooling heat exchanger, August 29, 2019

(4) WO C93695727, 2ADSA106, 2A emergency diesel starting air receiver inlet check valve, excessive back leakage, September 6, 2019

(5) WO C93677534, replace 11 auxiliary feedwater flow control valve inspection procedure for equipment qualification end of life, September 11, 2019

71111.22 - Surveillance Testing The inspectors evaluated the following surveillance tests: Surveillance Tests (other) (IP Section 03.01)

(1) STP-O-8A-2, "Test of 21 DG and 4kV Bus 21 UV," Revision 33, July 2, 2019

(2) STP-O-73IA-1, "A-Train HPSI Pump and Check Valve Operability Test," Revision 1,

July 26, 2019 Inservice Testing (IP Section 03.01) (1 Sample)

(1) STP-M-583-1, "Instrument Air Safety Related Pressure Boundary Check Valve Leak Test," Revision 901, July 10,

71124.07 - Radiological Environmental Monitoring Program Site Inspection (IP Section 02.01)

The inspectors evaluated the Radiological Environmental Monitoring Program implementation.

(1) The inspectors verified that the Radiological Environmental Monitoring Program quantified the impact of radioactive effluent releases to the environment and sufficiently validated the integrity of the radioactive gaseous and liquid effluent release program.

The inspectors verified that the Radiological Environmental Monitoring Program was consistently implemented with the licensees technical specifications and/or Offsite Dose Calculation Manual and validated that the program meets the design objectives in Appendix I to 10 CFR 50.

Groundwater Protection Initiative (GPI) Implementation (IP Section 02.02) (1 Sample)

(1) The inspectors verified that the licensee is continuing to implement the voluntary Nuclear Energy Institute/ Industry Ground Water Protection Initiative.

OTHER ACTIVITIES - BASELINE

===71151 - Performance Indicator Verification The inspectors verified licensee performance indicators submittals listed below: MS06: Emergency AC Power Systems (IP Section 02.05) ===

(1) Unit 1, July 1, 2018 - June 30, 2019

(2) Unit 2, July 1, 2018 - June 30, 2019 MS07: High Pressure Injection Systems (IP Section 02.06) (2 Samples)

(1) Unit 1, July 1, 2018 - June 30, 2019

(2) Unit 2, July 1, 2018 - June 30, 2019

MS08: Heat Removal Systems (IP Section 02.07) (2 Samples)

(1) Unit 1, July 1, 2018 - June 30, 2019

(2) Unit 2, July 1, 2018 - June 30, 2019 MS09: Residual Heat Removal Systems (IP Section 02.08) (2 Samples)

(1) Unit 1, July 1, 2018 - June 30, 2019

(2) Unit 2, July 1, 2018 - June 30, 2019 MS10: Cooling Water Support Systems (IP Section 02.09) (2 Samples)

(1) Unit 1, July 1, 2018 - June 30, 2019

(2) Unit 2, July 1, 2018 - June 30, 2019

71152 - Problem Identification and Resolution Annual Follow-up of Selected Issues (IP Section 02.03)

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

(1) Review of the licensee's evaluation and corrective actions for multiple instances of spurious reactor protection system single channel trips (AR04179778).

OTHER ACTIVITIES

- TEMPORARY INSTRUCTIONS, INFREQUENT AND ABNORMAL

60855.1 - Operation of an Independent Spent Fuel Storage Installation at Operating Plants Operation of an Independent Spent Fuel Storage Installation at Operating Plants

(1) The inspectors evaluated the licensee's independent spent fuel storage installation cask loadings on August 5 - 8, 2019. Specifically, the inspectors observed or reviewed the following activities:

Fuel selection Heavy load movement of the transfer cask and dry shielded canister Canister drying and helium backfill evolutions Closure welding and non-destructive weld evaluations Helium leak testing Radiological field surveys

INSPECTION RESULTS

Observation: Multiple Instances of Spurious Reactor Protection System Single 71152 Channel Trips The inspectors reviewed the licensee's evaluation and corrective actions associated with multiple instances of spurious reactor protection system single channel trips as documented in AR04179759, AR04179762, AR04179375, AR04179778, and other action requests. The inspectors concluded that the licensee had taken timely and appropriate actions in accordance with the licensee's operating and alarm response procedures, PI-AA-125, "Corrective Action Program Procedure," various revisions, 10 CFR 50, Appendix B, "Quality Assurance Criteria for Nuclear Power Plants," and 10 CFR 50.65, "Requirements for Monitoring the Effectiveness of Maintenance at Nuclear Power Plants." The inspectors reviewed the licensee's cause evaluations associated with the failures and determined the evaluations were adequate and did not identify a common cause between the failures. The inspectors evaluated industry operating experience, vendor recommendations, and the licensee's maintenance rule implementing procedures with regards to the reactor protection system and independently determined that the licensee's maintenance practices are consistent with industry standards and meet regulatory requirements. Based on the documents reviewed and discussions with licensee personnel, the inspectors noted that licensee personnel identified problems and entered them into the corrective action program at an appropriately low threshold.

EXIT MEETINGS AND DEBRIEFS

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

On October 23, 2019, the inspectors presented the integrated inspection results to Mr. Mark Flaherty, Site Vice President and other members of the licensee staff.

On August 14, 2019, the inspectors presented the Independent Spent Fuel Storage Installation inspection results to Mr. Mark Flaherty, Site Vice President and other members of the licensee staff.

THIRD PARTY REVIEWS The inspectors reviewed Institute for Nuclear Power Operations reports that were issued during the inspection period.

DOCUMENTS REVIEWED

Inspection Type Designation Description or Title Revision or Procedure Date 60855.1 Miscellaneous Calvert Cliffs Nuclear Power Plant License for Independent Storage of Spent Nuclear Fuel and High-Level Radioactive Waste, SNM-2505 Appendix A to Materials License SNM-2505 Technical Specifications Amendment No. 11 Procedures FH-354 NUHOMS 32PHB DSC Loading and Unloading, Revision 00000 ISFSI-04 ISFSI Loading of NUHOMS 32 PHB DSC, Revision 00100 10| ]]