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Notification of an NRC Triennial Heat Sink Performance Inspection and Request for Information; Inspection Report 05000331/2018001 (DRS-A.Dunlop)
	ML18012A548
Person / Time
Site:	Duane Arnold
Issue date:	01/10/2018
From:	Dunlop A; Division of Reactor Safety III
To:	Dean Curtland; NextEra Energy Duane Arnold
References
	IR 2018001
	Download: ML18012A548 (8)
	v • d • e

UNITED STATES

NUCLEAR REGULATORY COMMISSION

REGION III

2443 WARRENVILLE RD. SUITE 210

LISLE, ILLINOIS 60532-4352

January 10, 2018

Mr. Dean Curtland

Director of Site Operations

NextEra Energy Duane Arnold, LLC

3277 DAEC Road

Palo, IA 52324-9785

SUBJECT: DUANE ARNOLD ENERGY CENTERNOTIFICATION OF AN NRC TRIENNIAL

HEAT SINK PERFORMANCE INSPECTION AND REQUEST FOR

INFORMATION; INSPECTION REPORT 05000331/2018001

Dear Mr. Curtland:

On March 12, 2018, the U.S. Nuclear Regulatory Commission (NRC) will begin the onsite

portion of the Triennial Heat Sink Performance Inspection at your Duane Arnold Energy

Center. 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

January 29, 2018. By February 5, 2018, 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 February 28, 2018. 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

March 12, 2018. 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. Curtland -2-

The lead inspector for this inspection is Andrew Dunlop. We understand that our licensing

contact for this inspection is Laura Swenzinski of your organization. If there are any questions

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

inspector at 630-829-9726 or via e-mail at Andrew.Dunlop@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 10 CFR 2.390, Public Inspections, Exemptions, Requests for Withholding.

Sincerely,

/RA/

Andrew Dunlop, Senior Reactor Engineer

Engineering Branch 2

Division of Reactor Safety

Docket No. 50-331

License No. DPR-49

Enclosure:

Document Request for Triennial Heat Sink

Performance Inspection

cc: Distribution via LISTSERV

D. Curtland -3-

Letter to Dean Curtland from Andrew Dunlop dated January 10, 2018

SUBJECT: DUANE ARNOLD ENERGY CENTERNOTIFICATION OF AN NRC TRIENNIAL

HEAT SINK PERFORMANCE INSPECTION AND REQUEST FOR

INFORMATION; INSPECTION REPORT 05000331/2018001

DISTRIBUTION:

Jeremy Bowen

RidsNrrDorlLpl3

RidsNrrPMDuaneArnold Resource

RidsNrrDirsIrib Resource

Kenneth OBrien

DRPIII

DRSIII

ADAMS Accession Number ML18012A548

OFFICE RIII RIII RIII RIII

NAME ADunlop:cl

DATE 01/10/18

OFFICIAL RECORD COPY

DOCUMENT REQUEST FOR TRIENNIAL HEAT SINK PERFORMANCE INSPECTION

Inspection Report: 05000331/2018001

Inspection Dates: March 12-16, 2018;

Inspection Procedure: IP 71111.07, Heat Sink Performance

Lead Inspector: Andrew Dunlop

630-829-9726

Andrew.Dunlop@nrc.gov

I. Information Requested By January 29, 2018

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.

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 for the previous 3 years.

7. List of permanent and temporary modifications (with a short description)

associated with GL 89-13 heat exchangers for the previous 3 years.

II. Information Requested By February 28, 2018

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.

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.

Enclosure

DOCUMENT REQUEST FOR TRIENNIAL HEAT SINK PERFORMANCE INSPECTION

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.

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.

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DOCUMENT REQUEST FOR TRIENNIAL HEAT SINK PERFORMANCE INSPECTION

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 waterhammer or

hydraulic transients in the service water system for the previous 3 years.

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

diagrams 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 for the previous 3 years.

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 12, 2018

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

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.

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

for the next 5 years.

g. Copy of the design specification and heat exchanger data sheets for each

heat exchanger.

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DOCUMENT REQUEST FOR TRIENNIAL HEAT SINK PERFORMANCE INSPECTION

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.

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.

2. For the UHS

a. Copies of the inspection procedures for the verification of the structural

integrity of underwater UHS and the associated results for the two most

recently completed inspections.

b. Copies of the maintenance and/or inspection procedures for underwater UHS

sediment intrusion and the associated results including underwater diving

inspections and/or sediment removal activities for the two most recently

completed inspections.

c. Copies of calculations and surveillances that determine the UHS reservoir

capacity and heat transfer capability.

d. Copies of surveillance procedures and the two most recently completed tests

performed on the instrumentation relied upon to determine UHS reservoir

capability.

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DOCUMENT REQUEST FOR TRIENNIAL HEAT SINK PERFORMANCE INSPECTION

3. For the review of the operation of the safety-related service water system (or

equivalent) and the UHS:

a. Copies of any design change performed on the UHS within the last 6 years.

b. Copies of any design change performed on the safety-related service water

system within the last 6 years.

c. Copies of procedures for a loss of UHS.

d. Copies of procedures for a loss of service water system.

e. 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).

f. Copies of chemistry procedures that monitor for pH, calcium hardness, etc.

Also, provide copies of the associated results for the last 3 years.

g. Copies of documents associated with the monitoring of pump performance for

potential strong-pump vs. weak-pump interaction.

If the information requested above will not be available, please contact Andrew Dunlop as soon

as possible at 630-829-9726 or email Andrew.Dunlop@nrc.gov.

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ML18012A548

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