ML21238A314

Notification of an NRC Triennial Heat Sink Performance Inspection and Request for Information; Inspection Report 05000254/2021004; 05000265/2021004

ML21238A314
Person / Time
Site:	Quad Cities
Issue date:	08/26/2021
From:	Sanchez-Santiago E NRC/RGN-III/DRS/EB2
To:	Rhoades D Exelon Generation Co, Exelon Nuclear
References
IR 2021004
Download: ML21238A314 (9)

See also: IR 05000254/2021004

Text

August 26, 2021

Mr. David Rhoades

Senior VP, Exelon Generation Company, LLC

President and CNO, Exelon Nuclear

4300 Winfield Road

Warrenville, IL 60555

SUBJECT: QUAD CITIES NUCLEAR POWER STATION - NOTIFICATION OF AN NRC

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION AND REQUEST FOR

INFORMATION; INSPECTION REPORT 05000254/2021004; 05000265/2021004

Dear Mr. Rhoades:

On December 6, 2021, the U.S. Nuclear Regulatory Commission (NRC) will begin the onsite

portion of the Triennial Heat Sink Performance Inspection at your Quad Cities Nuclear Power

Plant. 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

documents 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 October 11, 2021. By

October 25, 2021, the 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 November 22, 2021. 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 includes the additional information above as well as plant specific reference

material. This information should be available onsite to the inspector on December 6, 2021.

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.

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.

D. Rhoades -2-

The lead inspector for this inspection is Elba Sanchez Santiago. We understand that our

licensing contact for this inspection is Richard Swart of your organization. If there are any

questions about the inspection or the material requested in the enclosure, please contact the

lead inspector at 630-829-9520 or via e-mail at elba.sanchezsantiago@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.

In accordance with Title 10 of the Code of Federal Regulations (10 CFR) 2.390, Public

Inspections, Exemptions, Requests for Withholding, of the NRC's "Rules of Practice," a copy of

this letter and its enclosure will be available electronically for public inspection in the NRC Public

Document Room or from the Publicly Available Records (PARS) component of NRCs

Agencywide Documents Access and Management System (ADAMS). ADAMS is accessible

from the NRC Web site at http://www.nrc.gov/reading-rm/adams.html (the Public Electronic

Reading Room).

Sincerely,

Signed by Sanchez Santiago, Elba

on 08/26/21

Elba Sanchez Santiago, Senior Reactor Inspector

Engineering Branch 2

Division of Reactor Safety

Docket Nos. 50-254; 50-265

License Nos. DPR-29; DPR-30

Enclosure:

Triennial Heat Sink Performance

Inspection Document Request

cc: Distribution via LISTSERV

D. Rhoades -3-

Letter to David Rhoades from Elba Sanchez Santiago dated August 26, 2021.

SUBJECT: QUAD CITIES NUCLEAR POWER STATION - NOTIFICATION OF AN NRC

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION AND REQUEST FOR

INFORMATION; INSPECTION REPORT 05000254/2021004; 05000265/2021004

DISTRIBUTION:

Jessie Quichocho

Aaron McCraw

RidsNrrDorlLpl3

RidsNrrPMQuadCities Resource

RidsNrrDroIrib Resource

John Giessner

Mohammed Shuaibi

Jamnes Cameron

Allan Barker

DRPIII

DRSIII

ADAMS Accession Number: ML21238A314

Publicly Available Non-Publicly Available Sensitive Non-Sensitive

OFFICE RIII

NAME ESanchezSantiago:

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DATE 08/26/2021

OFFICIAL RECORD COPY

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

Inspection Report: 05000254/2021004; 05000265/2021004

Inspection Dates: December 6 - 10, 2021

Inspection Procedure: IP 71111.07, Heat Sink Performance

Lead Inspector: Elba Sanchez Santiago

630-829-9520

elba.sanchezsantiago@nrc.gov

I. Information Requested by October 11, 2021:

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 NRC for the previous heat sink

performance inspection. The list should include all corrective action program

documents not on the last corrective action program document list.

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.

II. Information Requested by November 22, 2021:

1. Copies of the GL 89-13 responses.

2. Copy of the Updated Final Safety Analysis Report (UFSAR) section applicable to

the GL 89-13 Heat Exchanger Program.

Enclosure

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

3. Copies of procedures developed to implement the recommendations of GL 89-13

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

4. Copies of the selected corrective action program documents.

5. For the specific heat exchangers selected:

a. Copies of the UFSAR sections applicable for each heat exchanger.

b. Copy of system description and design basis document for the heat

exchangers (as applicable).

c. Provide a list of calculations (with a short description) which currently apply to

each heat exchanger.

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. Copy of the construction code, Design Specification, heat exchanger data

sheets, and vendor documents including component drawings applicable for

the heat exchangers.

f. Copies of normal, abnormal, and emergency operating procedures

associated with the selected heat exchangers.

6. For the ultimate heat sink (UHS) and the safety-related service water system (or

equivalent):

a. Copies of the applicable UFSAR sections.

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

c. Copy of any operability determinations or other documentation of degradation

associated with the UHS and the safety-related service water system.

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TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

d. Copy of the document (e.g. UFSAR or Technical Requirements Manual) that

states the maximum cooling water system inlet temperature limit that still

allows full licensed power operation of the nuclear reactor.

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

f. Copy of the construction code and Design Specification.

g. 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.

h. Copies of corrective action documents associated with water hammer or

hydraulic transients in the service water system since the last Heat Sink

Inspection.

i. If available, provide an electronic copy of piping and instrumentation

diagrams (P&IDs) for the service water system, including the intake structure.

j. Provide a list of calculations (with a short description), which currently apply

to UHS and safety-related service water system.

k. 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.

l. Provide a list of any design change (with a short description) performed on

the UHS or safety-related service water system since the last 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,

December 6, 2021:

1. For the specific heat exchangers selected:

a. Copy of the calculation which correlates surveillance testing results from

these heat exchangers with design basis heat removal capability (e.g. basis

for surveillance test acceptance criteria).

b. Copies of the two most recent completed tests and evaluation data

confirming thermal performance for those heat exchangers which are

performance tested.

c. 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

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TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

records for the instruments used during these tests.

d. Information regarding any alarms which monitor on-line performance.

e. Copy of the document describing the inspection results of each heat

exchanger. 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.

f. The cleaning and inspection maintenance schedule for each heat exchanger

for the next five years.

g. Copy of the Design Specification and heat exchanger data sheets for each

heat exchanger.

h. Copy of the vendor manuals including component drawings for each heat

exchanger.

i. Copy of the calculation which establishes the limiting (maximum) design

basis heat load which is required to be removed by each of these heat

exchangers.

j. Copy of the operating procedure that ensures that the maximum cooling

water system inlet temperature limit is not exceeded.

k. Copy of the calculations or documents which evaluate the potential for water

hammer in each heat exchanger or associated piping.

l. Copy of the calculations that evaluate excessive tube vibration in each heat

exchanger and the documents that describe the controls that prevent heat

exchanger degradation due to excessive flow induced vibration during

operation.

m. 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.

n. 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.

o. Copy of the document establishing the repair criteria (plugging limit) for

degraded tubes which are identified in each heat exchanger.

p. 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).

q. Copies of those documents that describe the methods taken to control water

chemistry in the heat exchangers.

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TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

2. For the review of the performance testing of the safety-related service water

system (or equivalent) and the UHS:

a. Copies of the last two performance tests, such as the ASME in-service test,

for the pumps, valves, and, if applicable, the towers fans in the safety-related

service water system. If the components are not performance tested, please

provide documentation verifying performance by the methods actually used.

b. Copies of the documents that demonstrate that flow balance testing was

performed during the last three years. If the last flow test was performed

longer than three years, then provide the last flow test.

c. Copies of the documents that demonstrate that flow balance testing will

continue to be periodically done in the future.

d. Copies of procedures used to monitor interface valves between the safety

related section of the service water system and the non-safety 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.

e. 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.

3. For the review associated with the system walkdown of the service water intake

structure:

a. Copies of corrective maintenance for the last six years associated with

service water strainers, traveling screens and trash racks.

b. Copies of the last two inspections and/or surveillances associated with

service water strainers, traveling screens and trash racks.

c. List of preventive maintenance, including frequency, associated with service

water strainers, traveling screens and trash racks.

d. Copies of abnormal procedures for the traveling screens and service water

strainers.

e. Copies of the last two inspections and/or surveillances documenting that

component mounts have not excessively degraded (i.e., due to corrosion).

For example, inspections for the mounts for the, Service water pumps,

service water strainers, traveling screens and trash racks.

f. Copies of the documents associated with the monitoring, trending, and

remediation of silt accumulation at the service water pump bay.

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TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

g. Copies of surveillance procedures and testing results performed on the

service water pump bay water level instruments. 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.

h. Copies of procedures associated with operating during adverse weather

conditions (e.g. icing, high temperatures, or low level).

i. Copy of the evaluation for the potential effects of low flow/level on underwater

weir walls intended to limit silt or sand intake, if applicable.

If the information requested above will not be available, please contact Elba Sanchez Santiago

as soon as possible at 630-829-9520 or e-mail elba.sanchezsantiago@nrc.gov.

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