|
|
| Line 17: |
Line 17: |
|
| |
|
| =Text= | | =Text= |
| {{#Wiki_filter:UNITED STATES | | {{#Wiki_filter: |
| NUCLEAR REGULATORY COMMISSION
| |
| REGION I
| |
| 2100 RENAISSANCE BLVD., SUITE 100
| |
| KING OF PRUSSIA, PENNSLYVANIA 19406-2713
| |
| February 22, 2021
| |
| Mr. David P. Rhoades
| |
| Senior Vice President
| |
| Exelon Generation Company, LLC
| |
| President and Chief Nuclear Officer
| |
| Exelon Nuclear
| |
| 4300 Winfield Road
| |
| Warrenville, IL 60555
| |
| SUBJECT: CALVERT CLIFFS NUCLEAR POWER PLANT, UNITS 1 AND 2 -
| |
| INFORMATION REQUEST FOR A TRIENNIAL BASELINE DESIGN BASES
| |
| ASSURANCE INSPECTION (TEAM); INSPECTION REPORT
| |
| 05000317/2021010 AND 05000318/2021010
| |
| Dear Mr. Rhoades:
| |
| The purpose of this letter is to notify you that the U.S. Nuclear Regulatory Commission (NRC)
| |
| Region I staff will conduct a Design Bases Assurance Inspection (DBAI) at Calvert Cliffs, Units 1
| |
| and 2. Paul Cataldo, a Senior Reactor Inspector from the NRCs Region I Office, will lead the
| |
| inspection team. The inspection will be conducted in accordance with Inspection Procedure
| |
| 71111.21M, Design Bases Assurance Inspection (Team), dated December 8, 2016 (ADAMS
| |
| Accession No. ML16340B000).
| |
| The inspection will evaluate the capability of risk-significant/low-margin components to function
| |
| as designed to support proper system operation. The inspection will also include a review of
| |
| selected modifications, operating experience, and as applicable, operator actions.
| |
| During a telephone conversation on February 16, 2021, with Mr. Kenneth Greene, Calvert Cliffs
| |
| Regulatory Assurance, we confirmed arrangements for the receipt of scoping documents for
| |
| information gathering and remote review, and the two-week onsite inspection(**), as follows:
| |
| * Information gathering and remote review: Weeks of March 22 through April 26, 2021
| |
| * Onsite weeks**: Weeks of June 7 and June 21, 2021
| |
| ** Due to the current Covid PHE, some activities may be conducted remotely.
| |
| The purpose of the information-gathering and remote review is to identify risk-significant
| |
| components, modifications, operator actions, and operating experience items. Information and
| |
| documentation needed to support the inspection will also be identified. Frank Arner, a Region I
| |
| Senior Risk Analyst, will support Paul Cataldo during the information-gathering visit and remote
| |
| review, to evaluate probabilistic risk assessment data and identify components to be examined
| |
| during the inspection.
| |
| | |
| D. Rhoades 2
| |
| Experience with previous baseline design/modification inspections of similar depth and length
| |
| has shown this type of inspection is resource intensive, both for the NRC inspectors and the
| |
| licensee staff. In order to minimize the inspection impact on the site and to ensure a productive
| |
| inspection for both parties, we have enclosed a request for information needed for the
| |
| inspection.
| |
| It is important that all of these documents are up-to-date and complete in order to minimize the
| |
| number of additional documents requested during the preparation and/or the onsite portions of
| |
| the inspection. Insofar as possible, this information should be provided electronically to the lead
| |
| inspector. The information request has been divided into two groups:
| |
| * The first group lists information necessary for our initial inspection scoping activities.
| |
| After discussion with Mr. Greene, in recognition of the outage-related activities in March
| |
| 2021, a majority of this information that should be easily and readily available for
| |
| uploading to Sharefile, should be provided to the lead inspector by the week of
| |
| March 22, 2021. Additionally, the remainder of the documents not uploaded due to
| |
| outage conflicts should be available to the lead inspector by April 12, 2021. By the week
| |
| of April 26, 2021, the lead inspector will communicate the initial selected set of
| |
| components and modifications.
| |
| * The second group of documents requested is those items needed to support our in-
| |
| office preparation activities. This set of documents, specific to the selected components
| |
| and modifications, should be provided to the lead inspector no later than May 28, 2021.
| |
| During the in-office preparation activities, the team may identify additional information
| |
| needed to support the inspection, and those items will be communicated directly to
| |
| Mr. Greene.
| |
| If there are any questions about the inspection or the material requested in the enclosure,
| |
| please contact the lead inspector at 603-395-5536 or via e-mail at pcc1@nrc.gov.
| |
| This letter does not contain new or amended information collection requirements subject to the
| |
| Paperwork Reduction Act of 1995 (44 U.S.C. 3501 et seq.). Existing information collection
| |
| requirements were approved by the Office of Management and Budget, Control Number 3150-
| |
| 0011. The NRC may not conduct or sponsor, and a person is not required to respond to, a
| |
| request for information or an information collection requirement unless the requesting document
| |
| displays a currently valid Office of Management and Budget Control Number.
| |
| | |
| D. Rhoades 3
| |
| This letter and its enclosure will be made available for public inspection and copying at
| |
| http://www.nrc.gov/reading-rm/adams.html and at the NRC Public Document Room in
| |
| accordance with Title 10 of the Code of Federal Regulations, Part 2.390, Public Inspections,
| |
| Exemptions, Requests for Withholding.
| |
| Sincerely,
| |
| X /RA/
| |
| Signed by: Melvin K. Gray
| |
| Mel Gray, Chief
| |
| Engineering Branch 1
| |
| Division of Reactor Safety
| |
| Docket Nos. 05000317 and 05000318
| |
| License Nos. DPR-53 and DPR-69
| |
| Enclosure:
| |
| Document Request for Design Bases
| |
| Assurance Inspection
| |
| cc: Distribution via ListServ
| |
| | |
| | |
| ML21053A314
| |
| Non-Sensitive Publicly Available
| |
| SUNSI Review
| |
| Sensitive Non-Publicly Available
| |
| OFFICE RI/DRS RI/DRS RI/DRS
| |
| NAME PCataldo FArner MGray
| |
| DATE 2/17/21 2/17/21 2/22/21
| |
|
| |
| DOCUMENT REQUEST FOR DESIGN BASES ASSURANCE INSPECTION
| |
| Inspection Report: 05000317/2021010 and 05000318/2021010
| |
| Onsite Inspection Dates: June 7 through June 11, 2021; and
| |
| June 21 through June 25, 2021
| |
| Inspection Procedure: Inspection Procedure 71111.21M, Design Bases Assurance
| |
| Inspection (Team)
| |
| Lead Inspector: Paul Cataldo, Senior Reactor Inspector
| |
| 603-395-5536
| |
| PCC1@nrc.gov
| |
| I. Information Requested for Selection of Components and Modifications
| |
| The following information is requested by March 22, 2021 (and April 12, 2021 for remaining
| |
| documents not provided due to outage-related conflicts) to facilitate inspection preparation.
| |
| Feel free to contact the lead inspector as soon as possible if you have any questions
| |
| regarding this information request. Please provide the information electronically
| |
| (Certrec/Sharefile) in pdf files, Excel, or other searchable formats. Also, we understand
| |
| the prevailing use of Sharefile for inspection-related information for the Exelon fleet,
| |
| therefore, the files should contain descriptive names, and indexed and hyperlinked to
| |
| facilitate ease of use by the inspectors. Information in lists should contain enough
| |
| information to be easily understood by someone who has knowledge of light water reactor
| |
| technology.
| |
| 1. The site probabilistic risk analysis (PRA) System Notebook and latest PRA Summary
| |
| Document.
| |
| 2. Risk ranking of top 250 basic events sorted by Risk Achievement Worth (>/= 1.3).
| |
| Include values for Risk Reduction Worth, Birnbaum Importance, and Fussell-Vesely (as
| |
| applicable). Please provide in an excel spreadsheet or other sortable format, and to
| |
| include an understandable definition of the coded, basic events.
| |
| 3. Risk-ranking of top 100 components from site-specific PRA sorted by Large Early
| |
| Release Frequency.
| |
| 4. If you have an External Events or Fire PRA Model, provide the information requested in
| |
| Items 1 and 2 for external events and fire. Provide narrative description of each coded
| |
| event, including fire and flood zone descriptions.
| |
| 5. List of time-critical and/or risk significant operator actions.
| |
| 6. List of emergency and abnormal operating procedures.
| |
| 7. If available, any pre-existing evaluation or list of components and associated
| |
| calculations with low design margins (e.g., pumps closest to the design limit for flow or
| |
| Enclosure
| |
| | |
| DOCUMENT REQUEST FOR DESIGN BASES ASSURANCE INSPECTION
| |
| pressure, diesel generator close to design required output, heat exchangers close to
| |
| rated design heat removal).
| |
| 8. If applicable, copy of any self-assessments and/or Quality Assurance assessments of
| |
| low margin structures, systems and components (SSCs) completed since July 1, 2018.
| |
| 9. List of available design margins in both the open and closed direction for valves in the
| |
| motor-operated valve and air-operated valve programs (related to GL 96-05, looking for
| |
| resultant output - matrix of risk vs margin for MOVs and AOVs, as applicable); the fleet
| |
| or Calvert Cliffs-specific MOV Program procedure.
| |
| 10. The age and capacity of the safety-related DC batteries.
| |
| 11. The In-Service Testing (IST) Program Basis document identifying the in-scope valves
| |
| and pumps, and the associated IST Program requirements for each component (e.g.,
| |
| IST valve table identifying category, active/passive function).
| |
| 12. Access to IST trend data for the following pumps for both units: AFW pumps, HPSI
| |
| pumps, LPSI/RHS pumps, and SW pumps. [Note: needed for each discrete component
| |
| (e.g. for each RHR pump)]
| |
| 13. Listing of MR (a)(1) systems, date entered into (a)(1) status, and brief description of
| |
| why (a)(1); if not included as part of Item 15 below, please include the latest System
| |
| Health report for those systems in (a)(1) status.
| |
| 14. List of MRFFs evaluations completed since July 1, 2018 (include those determined not
| |
| to be a MRFF).
| |
| 15. A copy of the most recent System Health and/or trending reports for the following
| |
| systems (as applicable): SR 4KV, SR 480 Vac, HPSI, LPSI/RHS, SW, SR 125 Vdc, and
| |
| EDGs.
| |
| 16. A copy of the most recent Program Health and/or trending reports for the following
| |
| programs, as applicable: GL 89-10 (MOVs), GL 89-13, IST, AOVs, breakers, relays.
| |
| 17. List of open operability evaluations, and the associated implementing procedure for
| |
| degraded and non-conforming conditions/operability evaluations; List of formal
| |
| operability evaluations performed for the last 4 years.
| |
| 18. List of current operator work arounds/burdens.
| |
| 19. List of permanent plant modifications to SSCs that are field work complete since
| |
| July 1, 2018. For the purpose of this inspection, permanent plant modifications include
| |
| permanent: plant changes, design changes, set point changes, equivalency
| |
| evaluations, suitability analyses, and commercial grade dedications. The list should
| |
| contain the number of each document, title (sufficient to understand the purpose of the
| |
| modification), revision/date, and the affected system. Please provide the design change
| |
| procedure that governs the implementation of the listed and applicable methods.
| |
| 20. List of calculation changes (including new calculations) that have been issued for use
| |
| since July 1, 2018.
| |
| 2
| |
| | |
| DOCUMENT REQUEST FOR DESIGN BASES ASSURANCE INSPECTION
| |
| 21. Corrective Action Program procedure.
| |
| 22. Procedures addressing the following: modifications, design changes, set point changes,
| |
| equivalency evaluations or suitability analyses, commercial grade dedications, and
| |
| post-modification testing.
| |
| 23. List of corrective action documents (open and closed) that address permanent plant
| |
| modifications issues, concerns, or processes, for the past four years; MOV-related
| |
| deficiencies, and any plant-level events that generated root or causal evaluations,
| |
| and/or associated Licensee Event Reports in the last four years.
| |
| 24. Any internal/external self-assessments and associated corrective action documents
| |
| generated in preparation for this inspection.
| |
| 25. Updated Final Safety Analysis Report, Technical Specifications, Technical
| |
| Specifications Bases, and Technical Requirements Manual.
| |
| 26. Electrical simple one-line drawings for 4KV, 480V, & 345KV (scalable for electronic
| |
| viewing preferred).
| |
| 27. Copy of Exelons internal responses to any applicable NRC Information Notices,
| |
| Generic Letters, or Regulatory Issue Summaries for the past four years.
| |
| 28. A list of NRC Part 21 Reports, determined to be applicable to Calvert Cliffs, for the past
| |
| 4 years.
| |
| 29. DBDs (if applicable & available): SR 4KV, SR 480 Vac, HPSI, LPSI/RHS, SW, SR 125
| |
| Vdc, and EDGs.
| |
| II. Information Requested to Be Available by May 28, 2021
| |
| This information should be separated for each selected component and modification, especially
| |
| if provided electronically (e.g., a folder for each component and modification named after the
| |
| component or modification that includes the information requested below). Items 1 through 11
| |
| are associated with the selected components and Item 12 is for the selected modifications.
| |
| 1. List of corrective action documents associated with each selected component for the
| |
| past four years.
| |
| 2. Maintenance history (e.g., corrective, preventive, and elective) associated with each
| |
| selected component for the last five years. Identify frequency of preventive
| |
| maintenance activities.
| |
| 3. Aging Management Program documents and/or License Renewal committed inspection
| |
| results applicable to each selected component.
| |
| 4. List of calculations associated with each selected component, excluding data files. Pipe
| |
| stress calculations are excluded from this request.
| |
| 5. System Health Report (last completed) and Design Basis Document associated with
| |
| each selected component, as applicable.
| |
| 3
| |
| | |
| DOCUMENT REQUEST FOR DESIGN BASES ASSURANCE INSPECTION
| |
| 6. Access to or copy of vendor manual(s) for each selected component.
| |
| 7. List of open temporary modifications associated with each selected component, if
| |
| applicable.
| |
| 8. Trend data/graphs on the selected components performance for the past three years
| |
| (e.g., pump performance including IST, other vibration monitoring, oil sample results).
| |
| 9. List of normal operating and alarm response procedures associated with each selected
| |
| component.
| |
| 10. Last completed tests and surveillances for each selected component performed for the
| |
| past three years. For those tests and surveillances performed at a periodicity of greater
| |
| than three years, provide the latest test performed.
| |
| 11. Schedule of surveillance testing of selected components that occur during the onsite
| |
| and offsite inspection weeks.
| |
| 12. For each selected modification, copies of associated documents such as modification
| |
| package, engineering changes, 50.59 screening or evaluation, relevant calculations,
| |
| post-modification test packages, associated corrective action documents, design
| |
| drawings, and new/revised preventive maintenance requirements.
| |
| 4
| |
| }} | | }} |
