ML18324A612

Ltr. 11/20/18 Prairie Island Nuclear Generating Plant, Units 1 and 2 - Notification of an NRC Triennial Heat Sink Performance Inspection and Request for Information; Inspection Report 05000282/2019001 and 05000306/2019001 (DRS-N.Feliz-Adorn

ML18324A612
Person / Time
Site:	Prairie Island
Issue date:	11/20/2018
From:	Nestor Feliz-Adorno NRC/RGN-III/DRS/EB2
To:	Sharp S Northern States Power Company, Minnesota
References
IR 2019001
Download: ML18324A612 (8)

See also: IR 05000282/2019001

Text

November 20, 2018

Mr. Scott Sharp

Site Vice President

Prairie Island Nuclear Generating Plant

Northern States Power Company, Minnesota

1717 Wakonade Drive East

Welch, MN

55089-9642 SUBJECT: PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNITS 1 AND 2

NOTIFICATION OF AN NRC TRIENNIAL HEAT SINK PERFORMANCE INSPECTION AND REQUEST FOR INFORMATION; INSPECTION REPORT 05000282/2019001 AND 05000306/2019001

Dear Mr. Sharp: On Monday, March 4, 2019, the U.S. Nuclear Regulatory Commission (NRC) will begin the onsite portion of the Triennial Heat Sink Performance Inspection at your

Prairie Island Nuclear Generating Plant, Units 1 and 2. This inspection will be performed in accordance with NRC baseline Inspection Procedure

71111.07. In order to minimize the impact that the inspection has on the site and to ensure a productive inspection, we have enclosed a request for documents needed for the inspection. The document request

have been divided into three groups.

The first group lists information necessary for our initial inspection scoping activities. This information should be available to the lead inspector no later than January 7, 2019. By January 18, 2019, the lead inspector will communicate the initial selected set of approximately 2

-3 risk significant heat exchangers.

The second group

is needed to support our in

-office preparation activities. This set of documents, including the calculations associated with the selected heat exchangers, should be available at the Regional Office no later than

February 18, 2019. This information should be separated for each selected component, especially if provided electronically (e.g., folder with component name that includes calculations, condition reports, maintenance history, etc

.). During the in

-office preparation activities, the inspector may identify additional information needed to support the inspection.

The last group

is the needed additional information identified during our in

-office preparation activities. This information should be available onsite to the inspector on

March 4, 2019. It is also requested that corrective action documents and/or questions developed during the inspection be provided to the inspector as the documents are generated.

S. Sharp -2- All requested documents are to be for the time period from the onsite inspection period

back to the documents that were provided in response to the previous

Heat Sink Performance Inspection. If no activities were accomplished in that time period, then the request applies to the last applicable document in the previous time period.

It is important that these documents be as complete as possible, in order to minimize the number of documents requested during the preparation week or during the onsite inspection.

The lead inspector for this inspection is

Néstor J. Féliz Adorno. We understand that our licensing contact for this inspection is Pamela Johnson

of your organization. If there are any questions about the inspection or the material requested in the enclosure, please

contact the lead inspector at

630-829-9739 or via e-mail at Nestor.Feliz

-Adorno@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. 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 Michael A. Jones Acting fo

r/ Néstor J. Féliz Adorno , Senior Reactor Engineer

Engineering Branch 2

Division of Reactor Safety

Docket No. 50

-282; 50-306 License No. DPR-42; DPR-60 Enclosure:

Document Request for Triennial Heat Sink

Performance Inspection

cc: Distribution via LISTSERV

S. Sharp -3- Letter to Scott Sharp

from Néstor J. Féliz Adorno

dated November 20, 2018. SUBJECT: PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNITS 1 AND 2

NOTIFICATION OF AN NRC TRIENNIAL HEAT SINK PERFORMANCE INSPECTION AND REQUEST FOR INFORMATION; INSPECTION REPORT 05000282/2019001 AND 05000306/2019001

DISTRIBUTION

Christopher Cook

RidsNrrPMPrairieIsland Resource

RidsNrrDorlLpl3

RidsNrrDirsIrib Resource

Steven West

Darrell Roberts

Jamnes Cameron

Allan Barker

DRPIII DRSIII ADAMS Accession Number: ML18324A612

OFFICE RIII NAME MJones for

NFéliz Adorno:cl DATE 11/20/18 OFFICIAL RECORD COPY

DOCUMENT REQUEST FOR

TRIENNIAL HEAT

SINK PERFORMANCE INSPECTION

Enclosure Inspection Report : 05000282/2019001; 05000306/2019001

Inspection Dates

March 4, 2019, through March 8, 2019 Inspection Procedure

Inspection

Procedure 71111.07, "Heat Sink Performance"

Lead Inspector

Néstor J. Féliz Adorno

630-829-9739 Nestor.Feliz

-Adorno@nrc.gov

I. Information Requested By January 7, 2019

1. List of the Generic Letter (GL) 8

9-13, "Service Water System Problems Affecting Safety-Related Equipment,"

heat exchangers in order of risk significance.

2. Copy of heat exchanger performance trending data tracked for each GL 89

-13 heat exchanger.

3. List of Corrective Action Program

documents (with a short description) associated with GL 89

-13 heat exchangers, heat sinks, silting, corrosion, fouling, or heat exchanger testing, for the previous

3 years or since the last Corrective Action Program document list was sent to the

U.S. Nuclear Regulatory Commission for the previous heat sink performance inspection.

4. Copy of any self

-assessment done on any of GL 89

-13 heat exchangers.

5. Last two System Health Report(s) and maintenance rule system notebooks for all the GL 89-13 heat exchangers.

6. List of engineering

-related operator workarounds

(with a short description)

associated with GL 89

-13 heat exchangers. The requested documents are to be for the time period from the onsite inspection period back to the

documents that were provided in response to the previous

heat sink performance

inspectio n. 7. List of permanent and temporary modifications

(with a short description)

associated with GL 89

-13 heat exchangers. The requested documents are to be for the time period from the onsite inspection period back to the

documents that were provided in response to the previous

heat sink performance

inspectio n. 8. Provide a list of any design change (with a short description) performed on the Ultimate Heat Sink (UHS) or safety-related service water systems.

The requested documents are to be for the time period from the onsite inspection period back to the

documents that were provided in response to the previous

heat sink performance inspectio n.

DOCUMENT REQUEST FOR

TRIENNIAL HEAT

SINK PERFORMANCE INSPECTION

2 9. Electronic copies of Updated Final Safety Analysis Report, Technical Specifications, Technical Specifications Bases, and Technical Requirements Manual. II Information Requested By February 18, 2019

1. Copies of the GL 89

-13 responses.

2. Copies of procedures developed to implement the recommendations of GL 89

-13 (e.g., the GL 89-13 Heat Exchanger Program description).

3. Copies of the selected corrective action program documents.

4. Copies of the selected modifications, if any.

5. For the specific heat exchangers selected:

a. Copy of system description and design basis document for the heat exchangers (as applicable).

b. Copy of the construction code, Design Specification, heat exchanger data sheets, and vendor documents including component drawings applicable for the heat exchangers.

c. Copy of the following calculations for each selected heat exchanger

that: i. establish the limiting design basis heat load required to be removed by each of these heat exchangers;

ii. demonstrate the heat exchangers capacity to remove the limiting heat load; iii. correlate surveillance testing and/or inspection results from these heat exchangers with design basis

heat removal capability (e.g., basis for surveillance test and/or inspection acceptance criteria);

iv. evaluate the potential for water hammer in each heat exchanger or associated piping; and

v. evaluate excessive tube vibration in each heat exchanger.

d. Copy of any operability determinations or other documentation of degradation associated with the heat exchangers or the systems that support the operation for the selected heat exchangers.

e. Copies of normal, abnormal, and emergency operating procedures associated with the selected heat exchangers.

f. Copy of the operating procedure that ensures that the maximum cooling water system inlet temperature limit is not exceeded.

DOCUMENT REQUEST FOR

TRIENNIAL HEAT

SINK PERFORMANCE INSPECTION

3 g. Copies of those documents that describe the methods taken to control water chemistry in the heat exchangers

. h. Copies of the two most recent completed tests and evaluation data confirming thermal performance for those heat exchangers which are performance tested.

i. Documentation and procedures that identify the types, accuracy, and location

of any special instrumentation used for the two most recently completed thermal performance tests for the heat exchangers (e.g., high accuracy ultrasonic flow instruments or temperature instruments). Include calibration records for the instruments used during these tests.

j. Information regarding any alarms which monitor on

-line performance.

k. Copy of the periodic flow testing at or near maximum design flow. The

requested documents are to be for the time period from the onsite inspection period back to the

documents that were provided in response to the previous

heat sink performance

inspectio n. l. Copy of the document which identifies the current number of tubes in service for each heat exchanger and the supporting calculation which establishes the maximum number of tubes which can be plugged in each heat exchanger

. m. Copy of the document establishing the repair criteria (plugging limit) for degraded tubes which are identified in each heat exchanger

. n. Copies of the documents that verify the structural integrity of the heat exchanger (e.g., eddy current summary sheets, ultrasonic testing results, and visual inspection results)

. o. The cleaning and inspection maintenance schedule for each heat exchanger for the next 5 years.

6. For the UHS and the safety

-related service water system (or equivalent):

a. Copy of system description and design basis document (as applicable).

b. Copy of any operability determinations or other documentation of degradation associated with the UHS and the safety

-related service water system

. c. Copy of the document (e.g., Technical Requirements Manual, procedure) that states the maximum cooling water system inlet temperature limit that still allows full licensed power operation of the nuclear reactor.

d. Copy of the construction code and Design Specification.

e. Copies of normal, abnormal, and emergency operating procedures associated with the UHS and safety

-related service water systems including procedures for loss of these systems.

DOCUMENT REQUEST FOR

TRIENNIAL HEAT

SINK PERFORMANCE INSPECTION

4 f. Copies of corrective action documents associated with waterhammer or hydraulic transients in the service water system since the last Heat Sink Inspection.

g. If available, provide an electronic copy of piping and instrumentation diagrams for the service water system, including the intake structure.

h. Provide a list of calculations (with a short description), which currently apply to UHS and safety-related service water system.

i. Provide a list of instruments (with a short description) associated with automatic or alarm functions for the safety

-related service water system and/or UHS.

j. Copies of calculations and surveillances that determine the UHS reservoir capacity and heat transfer capability.

k. Copies of the documents associated with the monitoring, trending, and remediation of silt accumulation at the

service water pump bay.

l. Copies of surveillance procedures and testing results performed

on the instrumentation relied upon to determine UHS reservoir capability. The requested documents are to be for the time period from the onsite inspection period back to the documents that were provided in response to the previous

heat sink performance

inspectio n. m. Inspections and/or maintenance related to preventing macrofouling (e.g.

, silt, dead mussel shells, or debris) and biotic fouling (e.g.

, fish, algae, grass, or kelp). The requested documents are to be for the time period from the onsite inspection period back to the

documents that were provided in response to the previous

heat sink performance

inspectio n. n. Copies of documents associated with the monitoring of pump performance for potential strong

-pump vs. weak

-pump interaction.

o. Copies of the last two performance tests, such as the American Society of Mechanical Engineers

in-service test, for the pumps and valves. If the components are not performance tested, please provide documentation verifying performance by the methods actually used.

p. Copies of the documents that demonstrate that flow balance testing was performed during the last

3 years. If the last flow test was performed longer than 3 years, then provide the last flow test.

q. Copies of procedures used to monitor interface valves between the safety-related section of the service water system and the nonsafety-related section and the associated results. The requested documents are to be for the time period from the onsite inspection period back to the

documents that were provided in response to the previous

heat sink performance

inspectio n.

DOCUMENT REQUEST FOR

TRIENNIAL HEAT

SINK PERFORMANCE INSPECTION

5 r. Copies of the procedures that verify the performance of risk significant

non-safety functions and the associated results. The requested documents are to be for the time period from the onsite inspection period back to the

documents that were provided in response to the previous heat sink performance

inspectio n. s. Copies of the testing, inspection, or monitoring program procedures for buried or inaccessible piping and the associated results. The requested documents are to be for the time period from the onsite inspection period back to the

documents that were provided in response to the previous

heat sink performance

inspectio n. t. History of any thru wall pipe leak on the system. The requested documents are to be for the time period from the onsite inspection period back to th

e documents that were provided in response to the previous

heat sink performance

inspectio n. u. Copies of the documents associated with the Periodic Inspection Program used to detect protective coating failure, corrosion, and erosion.

v. Copies of the

in-service test vibration monitoring results and operational history for deep draft vertical pumps, if applicable. The requested documents are to be for the time period from the onsite inspection period back to the

documents that were provided in response to the previous heat sink performance

inspectio n. 7. A schedule of all inspections, cleanings, maintenance, or testing of

any safety-related plant

heat exchanger to be performed during the onsite portion

of the inspection

. III Information Requested to be Available on First Day of Inspection, March 4, 2019

1. During the in

-office preparation activities, the team will be making final selections and may identify additional information needed to support the inspection. The lead inspector will provide a list of

any additional information needed during the week of February 25, 2019.

If you have questions regarding the information requested, please contact the lead inspector.