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 for/

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

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) 89-13, 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 inspection.

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 inspection.

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 inspection.

Enclosure

DOCUMENT REQUEST FOR TRIENNIAL HEAT SINK PERFORMANCE INSPECTION

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.

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DOCUMENT REQUEST FOR TRIENNIAL HEAT SINK PERFORMANCE INSPECTION

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 inspection.

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.

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DOCUMENT REQUEST FOR TRIENNIAL HEAT SINK PERFORMANCE INSPECTION

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 inspection.

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 inspection.

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 inspection.

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DOCUMENT REQUEST FOR TRIENNIAL HEAT SINK PERFORMANCE INSPECTION

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 inspection.

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 inspection.

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 the

documents that were provided in response to the previous heat sink

performance inspection.

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 inspection.

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.

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