ML15065A320

Notification of an NRC Triennial Heat Sink Performance Inspection - Request for Information Inspection Report 05000373/2015002; 05000374/2015002

ML15065A320
Person / Time
Site:	LaSalle
Issue date:	03/06/2015
From:	Christine Lipa NRC/RGN-III/DRS/EB2
To:	Bryan Hanson Exelon Generation Co, Exelon Nuclear
References
IR 2015002
Download: ML15065A320 (8)

See also: IR 05000373/2015002

Text

UNITED STATES

NUCLEAR REGULATORY COMMISSION

REGION III

2443 WARRENVILLE RD. SUITE 210

LISLE, IL 60532-4352

March 6, 2015

Mr. Bryan C. Hanson

Senior VP, Exelon Generation Company, LLC

President and CNO, Exelon Nuclear

4300 Winfield Road

Warrenville, IL 60555

SUBJECT: LASALLE COUNTY STATION, UNITS 1 AND 2 - NOTIFICATION OF AN NRC

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION - REQUEST FOR

INFORMATION INSPECTION REPORT 05000373/2015002; 05000374/2015002

Dear Mr. Hanson:

On April 20, 2015, the U.S. Nuclear Regulatory Commission (NRC) will begin the onsite

portion of the Triennial Heat Sink Performance Inspection at your LaSalle County Station,

Units 1 and 2. This inspection will be performed in accordance with NRC Baseline Inspection

Procedure (IP) 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 March 25, 2015. By

April 1, 2015, the inspector will communicate the initial selected set of approximately

1-2 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 April 10, 2015. 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 April 20, 2015. 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

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.

B. Hanson -2-

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

contact for this inspection is Mr. Larry Blunk of your organization. If there are questions about

the material requested, or the inspection, please call Mr. Andrew Dunlop at (630) 829-9726.

Please send the information to the following e-mail address: Andrew.Dunlop@nrc.gov.

A hard-copy with the required information is also an acceptable option.

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, its enclosure, and your response (if any) will be available electronically for public

inspection in the NRCs Public Document Room or from the Publicly Available Records (PARS)

component of the NRC's 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,

/RA/

Christine A. Lipa, Chief

Engineering Branch 2

Division of Reactor Safety

Docket Nos. 50-373; 50-374

License Nos. NPF-11; NPF-18

Enclosure:

Triennial Heat Sink Performance Inspection

Document Request

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TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

Inspection Report: 05000373/2015002; 05000374/2015002

Inspection Dates: April 20 - 24, 2015

Inspection Procedure: IP 71111.07, Heat Sink Performance

Lead Inspector: Andrew Dunlop

(630) 829-9726

Andrew.Dunlop@nrc.gov

I. Information Requested By March 25, 2015

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 (CAP) documents (with a short description)

associated with GL 89-13 heat exchangers, heat sinks, silting, corrosion, fouling, or

heat exchanger testing, from the previous 3 years or since the last CAP document

list was sent to the NRC for the previous heat sink performance inspection. The list

should include all CAP documents not on the last CAP document list.

4. Copy of any self-assessment done on any of GL 89-13 heat exchangers.

5. Last 2 System Health Reports 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 April 10, 2015

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).

Enclosure

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

4. Copies of the selected CAP 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.

8. 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).

2

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

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. Copy of any operability determinations or other documentation of degradation

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

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

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

Inspection.

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

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

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

to UHS and service water system.

l. 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.

m. 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.

6. 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, April 20, 2015

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 2 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 2 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. The requested documents are to be for the time period from the

3

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

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 5 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.

2. For the UHS:

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

integrity of underwater UHS, 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.

4

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

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. 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.

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

capacity, and heat transfer capability.

d. 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.

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

(or equivalent) and the UHS:

a. Copies of the last 2 performance tests, such as the American Society of

Mechanical Engineers 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 3 years. If the last flow test was performed longer

than 3 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.

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.

5

B. Hanson -2-

The lead inspector for this inspection is Mr. Andrew Dunlop. We understand that our regulatory contact

for this inspection is Mr. Larry Blunk of your organization. If there are questions about the material

requested, or the inspection, please call Mr. Andrew Dunlop at (630) 829-9726. Please send the

information to the following e-mail address Andrew.Dunlop@nrc.gov. A hard-copy with the required

information is also an acceptable option.

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, its

enclosure, and your response (if any) will be available electronically for public inspection in the NRCs

Public Document Room or from the Publicly Available Records (PARS) component of the NRC's

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,

/RA/

Christine A. Lipa, Chief

Engineering Branch 2

Division of Reactor Safety

Docket Nos. 50-373; 50-374

License Nos. NPF-11; NPF-18

Enclosure:

Triennial Heat Sink Performance Inspection

Document Request

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DISTRIBUTION:

Kimyata MorganButler Allan Barker

RidsNrrDorlLpl3-2 Resource Carole Ariano

RidsNrrPMLaSalle Linda Linn

RidsNrrDirsIrib Resource DRPIII

Cynthia Pederson DRSIII

Darrell Roberts Jim Clay

Richard Skokowski Carmen Olteanu

ADAMS Accession Number ML15065A320

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OFFICE RIII RIII

NAME JCorujo-Sandin for ADunlop:cl CLipa

DATE 03/06/15 03/06/15

OFFICIAL RECORD COPY