IR 05000317/2015011

IR 05000317/2015011 and 05000318/2015011; 12/14/2015 to 12/22/2015; Calvert Cliffs Nuclear Power Plant, Units 1 and 2; Component Design Bases Inspection (Programs)

ML16029A015
Person / Time
Site:	Calvert Cliffs
Issue date:	01/27/2016
From:	Jeffrey Kulp Engineering Region 1 Branch 2
To:	Bryan Hanson Exelon Generation Co, Exelon Nuclear
References
IR 2015011
Download: ML16029A015 (17)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION ary 27, 2016

SUBJECT:

CALVERT CLIFFS NUCLEAR POWER PLANT - COMPONENT DESIGN BASES INSPECTION (ENVIRONMENTAL QUALIFICATION PROGRAM)

REPORT 05000317/2015011 AND 05000318/2015011

Dear Mr. Hanson:

On December 18, 2015, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at the Calvert Cliffs Nuclear Power Plant, Units 1 and 2. The enclosed inspection report documents the inspection results, which were discussed on December 18, 2015, with Mr. G. Gellrich, Site Vice-President and other members of your staff. Following management review of the results of this pilot inspection, a telephonic exit meeting was conducted on December 22, 2015 with Mr. G. Gellrich, Site Vice-President and other members of your staff.

NRC inspectors examined activities conducted under your licenses as they relate to safety and compliance with the Commissions rules and regulations and with the conditions of your licenses.

In conducting the inspection, the team examined Exelons implementation of the electrical equipment environmental qualification program required by Title 10, Code of Federal Regulations (10 CFR) 50.49 for maintaining the qualified status of equipment during the life of the plant. The inspection involved field walkdowns, examination of selected procedures, calculations and records, and interviews with station personnel.

No NRC-identified or self-revealing findings were identified during this inspection.

In accordance with 10 CFR 2.390 of the NRCs Rules of Practice, a copy of this letter, its enclosure, and your response (if any) will be available electronically for public inspection in the NRC Public Docket Room or from the Publicly Available Records component of NRCs document system, Agencywide Documents Access and Management System (ADAMS).

ADAMS is accessible from the NRC Web site at http://www.nrc.gov/reading-rm/adams.html (the Public Electronic Reading Room).

Sincerely,

/RA/

Jeffrey A. Kulp, Chief Engineering Branch 2 Division of Reactor Safety

ML16029015 Non-Sensitive Publicly Available SUNSI Review Sensitive Non-Publicly Available OFFICE RI/DRS RI/DRP RI/DES NAME DKern ADimitriadis JKulp DATE 1/26/16 1/27/16 1/27/16 Docket Nos. 50-317 and 50-318 License Nos. DPR-53 and DPR-69

Enclosure:

Inspection Report 05000317/2015011 and 05000318/2015011 w/Attachment: Supplemental Information

REGION I==

Docket Nos.: 50-317 and 50-318 License Nos.: DPR-53 and DPR-69 Report Nos.: 05000317/2015011 and 05000318/2015011 Licensee: Exelon Generation Company, LLC (Exelon)

Facility: Calvert Cliffs Nuclear Power Plant, Units 1 and 2 Location: Lusby, MD Inspection Period: December 14 through December 22, 2015 Inspectors: D. Kern, Senior Reactor Inspector, Division of Reactor Safety (DRS),

Team Leader S. Pindale, Senior Reactor Inspector, DRS J. Brand, Reactor Inspector, DRS Approved By: Jeffrey A. Kulp, Chief Engineering Branch 2 Division of Reactor Safety i Enclosure

SUMMARY

IR 05000317/2015007 and 05000318/2015007; 12/14/2015 - 12/22/2015; Calvert Cliffs

Nuclear Power Plant, Units 1 and 2; Component Design Bases Inspection (Programs).

The report covers the Component Design Bases Inspection (Programs) conducted by a team of three U.S. Nuclear Regulatory Commission (NRC) inspectors. The NRCs program for overseeing the safe operation of commercial nuclear power reactors is described in NUREG-1649, Reactor Oversight Process, Revision 5, dated February 2014.

No findings were identified.

ii

REPORT DETAILS

REACTOR SAFETY

Cornerstones: Initiating Events, Mitigating Systems, and Barrier Integrity

1R21 Component Design Bases Inspection (Programs) (IP 71111.21N - 9 samples)

.1 Inspection Sample Selection Process

The inspection team assessed the implementation of Exelons Environmental Qualification (EQ) program, established to meet the requirements of Title 10, Code of Federal Regulations (CFR) 50.49, Environmental Qualification of Electrical Equipment Important to Safety for Nuclear Power Plants. The scope of this rule includes safety related equipment relied upon to remain functional during and following design basis events, non-safety related equipment whose failure under postulated environmental conditions could prevent safety-related equipment from performing design functions, and certain post-accident monitoring equipment. The team selected risk significant components for review using information contained in the Calvert Cliffs Probabilistic Risk Assessment (PRA) and the U.S. Nuclear Regulatory Commissions (NRC) Standardized Plant Analysis Risk (SPAR) model for the Calvert Cliffs Nuclear Power Plant (CCNPP).

Additionally, the team referenced the Risk-Informed Inspection Notebook for the CCNPP in the selection of potential components for review. In general, the selection process focused on components which had a high Fussell Vesely Importance factor.

The NRC originally verified CCNPP EQ program implementation through a series of onsite inspections from 1984 - 1989. The EQ program at that time established measures to ensure EQ through the 40 year operating license period. Since that time, both units have renewed their operating licenses for an additional 20 years, and in 2014 Unit 1 entered its period of extended operation. The team initially compiled a list of components based on the risk factors previously mentioned. The team then interviewed plant staff, reviewed procurement, maintenance, and design records, and walked down plant areas susceptible to high energy line breaks. Based on these additional reviews, the team focused the inspection on EQ program elements and components which were repaired, modified, or replaced during the last 10 years (i.e., since 2004). Components from each unit were selected and included fan motors, pump motors, motor-operated valves (MOVs),air operated control valves, and pressure transmitters located both inside and outside of containment. For each component selected, the team also evaluated the environmental qualification of supporting sub-components including seals, lubricants, connectors, control and power cables, solenoids, transducers, limit switches, and terminal blocks.

.2 Results of Detailed Reviews

a. Inspection Scope

The inspection performed by the team was a pilot inspection conducted as outlined in NRC Inspection Procedure (IP) 71111.21N. The team assessed Exelons implementation of the EQ program as required by 10 CFR 50.49. The team evaluated whether CCNPP staff properly maintained the EQ of electrical equipment important to safety through plant life (repair, replacement, modification, and plant life extension), established and maintained required EQ documentation records, and implemented an effective corrective action program to identify and correct EQ-related deficiencies and evaluate EQ-related industry operating experience.

This inspection effort included review of EQ program-related procedures, component EQ files, EQ test records, equipment maintenance and operating history, maintenance and operating procedures, vendor documents, design documents, and calculations. The team interviewed operators, engineers, maintenance staff, and procurement staff. Additionally the inspectors performed physical in-plant walkdowns (where accessible) to verify installed equipment was the same as described in Exelons EQ component documentation files, verify components were installed in their tested configuration, determine whether equipment surrounding the EQ component may fail in a manner that could prevent the EQ component from performing its safety function, and verify that components located in areas susceptible to a high energy line break were properly evaluated for operation in a harsh environment. The team reviewed procurement records and inspected a sample of replacement parts stored in the warehouse to verify EQ parts approved for installation in the plant were properly identified and controlled; and that storage time and environmental conditions did not adversely affect the components qualified life or service life. The inspectors also reviewed Exelons evaluation of NRC Information Notice (IN) 2014-04, Potential for Teflon Material Degradation in Containment Penetrations, Mechanical Seals; and NRC IN 2015-12, Unaccounted for Error Terms Associated with the Irradiation Testing and Environmental Qualification of Important-to-Safety Components, to verify industry EQ-related operating experience issues were understood and addressed through the site corrective action program. Documents reviewed for this inspection are listed in the

. Component samples selected for this inspection are listed below.

1MB114, Unit 1 Containment Cooling Fan 12 Motor (motor # 1X323727A4-MV)2MA110, Unit 2 High Pressure Safety Injection Pump 23 Motor (serial # DF8377331).

Purchase order 41739 describes the motor repair.

1MOV659-OP, Unit 1 Safety Injection Pump 11 Mini-flow Return Valve Motor Operator and associated limit switches (1-ZS-659A/B)1MOV4145-OP, Unit 1 Containment Sump Discharge Valve Motor Operator and associated limit switches (1-ZS-4145A/B)2MOV4516-OP, Unit 2 Steam Generator 21 Feed Water Isolation Valve Motor Operator and associated limit switches (2-ZS-4516A/B)1CV5208, Unit 1 Component Cooling Heat Exchanger 12 Service Water Outlet Control Valve Solenoids (1SV5208 and 1SV5208A) and limit switches (1-ZS-5208A/B), and transducer (1-I/P-5208)1CV4070A, Unit 1 Steam Generator 11 AFW Main Steam Bypass Control Valve Solenoid (1SV4070A) and limit switches (1-ZS-4070AA/B)1PT102B, Unit 1 Pressurizer Pressure Transmitter (pressurizer low pressure trip function)2PT1023A, Unit 2 Feed Water Steam Generator 22 Protection System Pressure Transmitter (reactor protection system trip, engineered safeguards features actuation system trip, and asymmetric protection function)

b. Findings

No findings were identified.

4OA2 Identification and Resolution of Problems (IP 71152)

a. Inspection Scope

The team reviewed a sample of problems that Exelon had previously identified and entered into the corrective action program over the period 2010 to 2015. The team reviewed these issues to verify an appropriate threshold for identifying issues and to evaluate the effectiveness of corrective actions. In addition, issue reports written on issues identified during the inspection were reviewed to verify adequate problem identification and incorporation of the problem into the corrective action system. The specific corrective action documents that were sampled and reviewed by the team are listed in the Attachment.

B Findings No findings were identified.

4OA6 Meetings, including Exit

On December 18, 2015, the team presented the inspection results to Mr. G. Gellrich, Site Vice President, and other members of the CCNPP staff. Following management review of the results of this pilot inspection, a telephonic exit meeting was conducted on December 22, 2015 with Mr. G. Gellrich, Site Vice-President and other members of your staff. The team reviewed proprietary information, which was returned to Exelon at the end of the inspection. The team verified that no proprietary information was retained by the inspectors or documented in this report.

ATTACHMENT:

SUPPLEMENTAL INFORMATION

KEY POINTS OF CONTACT

Exelon Personnel

G. Gellrich, Site Vice President

W. Buffington, Procurement Engineer

K. Chermansky, Senior System Engineer

K. Eiane, Programs Engineer

M. Gahan, Manager, Engineering Modification Design

D. Hearst, Director, Maintenance

M. Herron, Manager, Electrical and Controls Design

E. Hussain, Senior Design Engineer

D. Johnson, Environmental Qualification Program Engineer

C. Junge, Design Engineer

J. Koelbel, PRA Engineer

J. Kilpatrick, Environmental Qualification Program Consultant

D. Lauver, Manager, Design Engineering

B. Mahoney, Design Engineer

C. McCall, CMO Mechanical Maintenance Specialist

S. Riechard, Regulatory Specialist

J. Smith, Director, Engineering

J. Suarez-Murias, Environmental Qualification Program Engineer

S. Waiters, Modification Design Engineer

F. Wilson, Programs Engineer

R. Wise, Environmental Qualification Program Consultant

LIST OF ITEMS OPENED, CLOSED, DISCUSSED, AND UPDATED

Open and

Closed

None