ML19281D203
| ML19281D203 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 10/08/2019 |
| From: | Ijaz Hafeez NRC/RGN-III |
| To: | Bryan Hanson Exelon Generation Co, Exelon Nuclear |
| References | |
| IR 2019011 | |
| Download: ML19281D203 (5) | |
See also: IR 05000237/2019011
Text
October 8, 2019
Mr. Bryan C. Hanson
Senior VP, Exelon Generation Co., LLC
President and CNO, Exelon Nuclear
4300 Winfield Road
Warrenville, IL 60555
SUBJECT: DRESDEN NUCLEAR POWER STATION, UNITS 2 AND 3INFORMATION
REQUEST TO SUPPORT UPCOMING TEMPORARY INSTRUCTION 2515/194
INSPECTION; INSPECTION REPORT 05000237/2019011; 05000249/2019011
Dear Mr. Hanson:
This letter is to request information to support our inspection of the Industry Initiative Associated
with the Open Phase Condition Design Vulnerabilities in Electric Power Systems (U.S. Nuclear
Regulatory Commission (NRC)Bulletin 2012-01) beginning December 2, 2019, at your
Dresden Nuclear Power Station. This inspection will be performed in accordance with the
NRC Temporary Instruction 2515/194.
In order to minimize the impact that the inspection has on the site and to ensure a productive
inspection, we have enclosed a list of documents requested for the inspection. Please provide
this information prior to November 18, 2019. 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 inspections. Insofar as possible, this
information should be provided electronically to the lead inspector.
The lead inspector for this inspection is Mr. Ijaz Hafeez. We understand that our licensing
contact for this inspection is Mr. Dan Mearhoff of your organization. If there are any questions
about the inspection or the material requested in the enclosure, please contact the lead
inspector at 630-829-9843 or via e-mail at Ijaz.Hafeez@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.
B. Hanson -2-
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,
/RA/
Ijaz Hafeez, Reactor Engineer
Engineering Branch 3
Division of Reactor Safety
Docket Nos. 50-237; 50-249
Enclosure:
Document Request for Temporary
Instruction 2515/194 Inspection
cc: Distribution via LISTSERV
B. Hanson -3-
Letter to Bryan C. Hanson from Ijaz Hafeez dated October 8, 2019.
SUBJECT: DRESDEN NUCLEAR POWER STATION, UNITS 2 AND 3INFORMATION
REQUEST TO SUPPORT UPCOMING TEMPORARY INSTRUCTION 2515/194
INSPECTION; INSPECTION REPORT 05000237/2019011; 05000249/2019011
DISTRIBUTION:
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ADAMS Accession Number: ML19281D203
OFFICE RIII
NAME IHafeez:jw
DATE 10/08/19
OFFICIAL RECORD COPY
DOCUMENT REQUEST FOR TEMPORARY INSTRUCTION 2515/194 INSPECTION
Inspection Report: 05000237/2019011; 05000249/2019011
Inspection Dates: December 2-6, 2019
Inspection Procedures: 2515/194-TI-2515-Phase 5
Inspector: Ijaz Hafeez
630-829-9843
Ijaz.Hafeez@nrc.gov
Please provide the following documentation (Items 1-8) to the lead inspector prior to the onsite
inspection date, preferably no later than November 18, 2019. Whenever practical, please
provide copies electronically. Please provide an index of the requested documents which
includes a brief description of the document and the numerical heading associated with the
request (i.e., where it can be found in the list of documents requested).
1. Copies of any calculations, analyses, and/or test reports performed to support the
implementation of your open phase condition (OPC) solution. If, in your implementation,
OPCs are not detected and alarmed in the control room please include documentation
that: (a) demonstrates the OPC will not prevent functioning of important-to-safety
structures, systems, and components; and (b) detection of an OPC will occur within a
short period of time (e.g., 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />).
2. Copies of any modification packages, including Title 10 of the Code of Federal
Regulations, Part 50.59 evaluations if performed, used for or planned for the
implementation of your OPC solution.
3. Copies of periodic maintenance, surveillance, setpoint calibration, and/or test
procedures implemented or planned, for your OPC solution.
4. Copies of your licensing basis changes to Updated Final Safety Analysis Report and/or
Technical Specifications (TS), as applicable, which discuss the design features and
analyses related to the effects of, and protection for, any open phase condition design
vulnerability.
5. Copies of any procurement specifications and acceptance testing documents related to
the installation of your OPC solution.
6. Copies of any site training the team will need to accomplish to gain access to areas with,
or planned, major electrical equipment used in your OPC solution (i.e., switchyard).
7. Provide documentation showing that with an OPC occurrence and no accident condition
signal present, either:
a. An OPC does not adversely affect the function of important-to-safety structures,
systems, and components, or
Enclosure
DOCUMENT REQUEST FOR TEMPORARY INSTRUCTION 2515/194 INSPECTION
b. TS LCOs are maintained or the TS actions are met without entry into TS
LCO 3.0.3, and
i. Important-to-safety equipment is not damaged by the OPC, and
ii. Shutdown safety is not compromised.
8. With OPC occurrence and an accident condition signal present:
a. Provide documentation showing that automatic detection and actuation will
transfer loads required to mitigate postulated accidents to an alternate source
and ensure that safety functions are preserved, as required by the current
licensing bases, or
b. Provide documentation showing that all design basis accident acceptance criteria
are met with the OPC, given other plant design features. Accident assumptions
must include licensing provisions associated with single failures. Typically,
licensing bases will not permit consideration of the OPC as the single failure
since this failure is a non-safety system.
Please provide the following documentation to the team when they arrive onsite. Whenever
practical, please provide copies electronically, except for drawings. Drawings should be
provided as paper copies of sufficient size (ANSI C or D) such that all details are legible.
1. A brief presentation describing your electric power system design and typical electrical
transmission and distribution system alignments; OPC design schemes installed to
detect, alarm and actuate; bus transfer schemes; and maintenance and surveillance
requirements. This presentation should be a general overview of your system. Please
schedule the overview shortly after the entrance meeting.
2. Plant layout and equipment drawings for areas that identify: (a) the physical plant
locations of major electrical equipment used in your open phase condition solution;
(b) the locations of detection and indication equipment used in the OPC sensing circuits.
3. If OPC actuation circuits are required, provide documentation that demonstrates
continued coordination with the other protective devices in both the offsite electrical
system (within Plant area of responsibility) and the onsite electrical systems.
4. Access to locations in which open phase condition equipment is installed or planned
(i.e., switchyard, etc.).
5. Copies of documentation or testing that demonstrates your OPC solution minimizes
spurious actuation or misoperation in the range of voltage imbalance normally expected
in the transmission system that could cause undesired separation from an operable
off-site power source.
2