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| {{#Wiki_filter:April 8, 2021 | | {{#Wiki_filter: |
| Mr. Thomas Conboy
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| Site Vice President
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| Monticello Nuclear Generating Plant
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| Northern States Power Company, Minnesota
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| 2807 West County Road 75
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| Monticello, MN 55362-9637
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| SUBJECT: MONTICELLO NUCELAR GENERATING PLANTINFORMATION REQUEST TO
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| SUPPORT UPCOMING TEMPORARY INSTRUCTION 2515/194 INSPECTION;
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| INSPECTION REPORT 05000263/2021011
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| Dear Mr. Conboy:
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| This letter is to request information to support our inspection of the Industry Initiative Associated
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| with the Open Phase Condition Design Vulnerabilities in Electric Power Systems (U.S. Nuclear
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| Regulatory Commission (NRC) Bulletin 2012-01) beginning June 21, 2021, at your Monticello
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| Nuclear Generating Station. This inspection will be performed in accordance with the NRC
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| Temporary Instruction 2515/194.
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| In order to minimize the impact that the inspection has on the site and to ensure a productive
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| inspection, we have enclosed a list of documents requested for the inspection. Please provide
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| this information prior to May 03, 2021. It is important that all of these documents are up to date
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| and complete in order to minimize the number of additional documents requested during the
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| preparation and/or the onsite portions of the inspections. Insofar as possible, this information
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| should be provided electronically to the lead inspector.
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| The lead inspector for this inspection is Mr. I. Hafeez. We understand that our licensing contact
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| for this inspection is Mr. S. Sollom of your organization. If there are any questions about the
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| inspection or the material requested in the enclosure, please contact the lead inspector at
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| 630-829-9843 or via e-mail at Ijaz.Hafeez@nrc.gov.
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| This letter does not contain new or amended information collection requirements subject
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| to the Paperwork Reduction Act of 1995 (44 U.S.C. 3501 et seq.). Existing information
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| collection requirements were approved by the Office of Management and Budget, Control
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| Number 3150-0011. The NRC may not conduct or sponsor, and a person is not required to
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| respond to, a request for information or an information collection requirement unless the
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| requesting document displays a currently valid Office of Management and Budget Control
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| Number.
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| T. Conboy -2-
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| This letter and its enclosure will be made available for public inspection and copying at
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| http://www.nrc.gov/reading-rm/adams.html and at the NRC Public Document Room in
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| accordance with 10 CFR 2.390, Public Inspections, Exemptions, Requests for Withholding.
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| Sincerely,
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| /RA/
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| Ijaz Hafeez, Reactor Inspector
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| Engineering Branch 3
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| Division of Reactor Safety
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| Docket No. 50-263
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| License No. DPR-22
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| Enclosure:
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| Document Request for Temporary
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| Instruction 2515/194 Inspection
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| cc: Distribution via LISTSERV
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| T. Conboy -3-
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| Letter to Thomas Conboy from Ijaz Hafeez dated April 8, 2021.
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| SUBJECT: MONTICELLO NUCELAR GENERATING PLANTINFORMATION REQUEST TO
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| SUPPORT UPCOMING TEMPORARY INSTRUCTION 2515/194 INSPECTION;
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| INSPECTION REPORT 05000263/2021011
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| DISTRIBUTION:
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| Jessie Quichocho
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| Mark Haire
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| RidsNrrPMPrairieIsland Resource
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| RidsNrrDorlLpl3
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| RidsNrrDroIrib Resource
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| John Giessner
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| Kenneth OBrien
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| Jamnes Cameron
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| Allan Barker
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| DRPIII
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| DRSIII
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| Brett Titus
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| ADAMS Accession Number: ML21099A090
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| Publicly Available Non-Publicly Available Sensitive Non-Sensitive
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| OFFICE RIII
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| NAME IHafeez:mb
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| via e-mail
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| DATE 04/08/2021
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| OFFICIAL RECORD COPY
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| DOCUMENT REQUEST FOR TEMPORARY INSTRUCTION 2515/194 INSPECTION
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| Inspection Report: 05000263/2021011
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| Inspection Dates: June 21, 2021, through June 25, 2021
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| Inspection Procedures: 2515/194-TI-2515-Phase 5
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| Inspector: Ijaz Hafeez
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| 630-829-9843
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| Ijaz.Hafeez@nrc.gov
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| Please provide the following documentation (Items 1-9) to the lead inspector prior to the onsite
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| inspection date, preferably no later than May 03, 2021. Whenever practical, please provide
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| copies electronically. Please provide an index of the requested documents which includes a
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| brief description of the document and the numerical heading associated with the request (i.e.,
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| where it can be found in the list of documents requested).
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| 1. Copies of any calculations, analyses, and/or test reports performed to support the
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| implementation of your open phase condition (OPC) solution. If, in your implementation,
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| OPCs are not detected and alarmed in the control room please include documentation
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| that: (a) demonstrates the OPC will not prevent functioning of important-to-safety
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| structures, systems, and components; and (b) detection of an OPC will occur within a
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| short period of time (e.g., 24 hours).
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| 2. Copies of any modification packages, including Title 10 of the Code of Federal
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| Regulations, Part 50.59 evaluations if performed, used for or planned for the
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| implementation of your OPC solution.
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| 3. Copies of periodic maintenance, surveillance, setpoint calibration, and/or test
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| procedures implemented or planned, for your OPC solution.
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| 4. Copies of your licensing basis changes to Updated Final Safety Analysis Report and/or
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| Technical Specifications, as applicable, which discuss the design features and analyses
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| related to the effects of, and protection for, any open phase condition design
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| vulnerability.
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| 5. Copies of any procurement specifications and acceptance testing documents related to
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| the installation of your OPC solution.
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| 6. Copies of any site training the team will need to accomplish to gain access to areas with,
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| or planned, major electrical equipment used in your OPC solution (i.e., switchyard).
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| 7. Provide documentation showing that with an OPC occurrence and no accident condition
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| signal present, either:
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| a. An OPC does not adversely affect the function of important-to-safety structures,
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| systems, and components; or
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| Enclosure
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| DOCUMENT REQUEST FOR TEMPORARY INSTRUCTION 2515/194 INSPECTION
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| b. TS LCOs are maintained, or the TS actions are met without entry into
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| TS LCO 3.0.3, and
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| i. Important-to-safety equipment is not damaged by the OPC; and
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| ii. Shutdown safety is not compromised.
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| 8. With OPC occurrence and an accident condition signal present:
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| a. Provide documentation showing that automatic detection and actuation will
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| transfer loads required to mitigate postulated accidents to an alternate source
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| and ensure that safety functions are preserved, as required by the current
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| licensing bases; or
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| b. Provide documentation showing that all design basis accident acceptance criteria
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| are met with the OPC, given other plant design features. Accident assumptions
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| must include licensing provisions associated with single failures. Typically,
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| licensing bases will not permit consideration of the OPC as the single failure
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| since this failure is a non-safety system.
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| 9. For those licensees that opted to demonstrate that operator manual actions will be
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| sufficient to mitigate the impact of an OPC, in accordance with VII, Revision 3,
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| Attachment 1 and NEI 19-02, Guidance for Assessing Open Phase Condition
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| Implementation Using Risk Insights, instead of automatic protective actions discussed
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| in Section 03.02.b of TI 2515/194, Revision 2, provide the following:
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| a. Copies of any PRA evaluations for your plant response to an open phase
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| condition including your Human Reliability Analysis (HRA) and sensitivity
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| analyses; and
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| b. Procedure(s) and operator actions required to respond to an OPC alarm and
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| potential equipment trip.
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| Please provide the following documentation to the team when they arrive onsite. Whenever
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| practical, please provide copies electronically, except for drawings. Drawings should be
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| provided as paper copies of sufficient size (ANSI C or D) such that all details are legible.
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| 1. A brief presentation describing your electric power system design and typical electrical
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| transmission and distribution system alignments; OPC design schemes installed to
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| detect, alarm and actuate; bus transfer schemes; and maintenance and surveillance
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| requirements. This presentation should be a general overview of your system. Please
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| schedule the overview shortly after the entrance meeting.
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| 2. Plant layout and equipment drawings for areas that identify: (a) the physical plant
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| locations of major electrical equipment used in your open phase condition solution; and
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| (b) the locations of detection and indication equipment used in the OPC sensing circuits.
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| 3. If OPC actuation circuits are required, provide documentation that demonstrates
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| continued coordination with the other protective devices in both the offsite electrical
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| system (within Monticello Nuclear Generating Plant area of responsibility) and the onsite
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| electrical systems.
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| 2
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| DOCUMENT REQUEST FOR TEMPORARY INSTRUCTION 2515/194 INSPECTION
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| 4. Access to locations in which open phase condition equipment is installed or planned
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| (i.e., switchyard, etc.).
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| 5. Copies of documentation or testing that demonstrates your OPC solution minimizes
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| spurious actuation or mis operation in the range of voltage imbalance normally expected
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| in the transmission system that could cause undesired separation from an operable
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| off-site power source.
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| 3
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| }} | | }} |
