ML17272A867

Notification of NRC Triennial Heat Sink Performance Inspection and Request for Information; Inspection Report 05000456/2017004; 05000457/2017004 (Gfo)

ML17272A867
Person / Time
Site:	Braidwood
Issue date:	09/29/2017
From:	O'Dwyer G NRC/RGN-III/DRS/EB2
To:	Bryan Hanson Exelon Generation Co, Exelon Nuclear
References
IR 2017004
Download: ML17272A867 (9)

See also: IR 05000456/2017004

Text

UNITED STATES

NUCLEAR REGULATORY COMMISSION

REGION III

2443 WARRENVILLE RD. SUITE 210

LISLE, IL 60532-4352

September 29, 2017

Mr. Bryan C. Hanson

Senior VP, Exelon Generation Company, LLC

President and CNO, Exelon Nuclear

4300 Winfield Road

Warrenville, IL 60555

SUBJECT: BRAIDWOOD STATION, UNITS 1 AND 2NOTIFICATION OF AN NRC

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION AND REQUEST FOR

INFORMATION; INSPECTION REPORT 05000456/2017004; 05000457/2017004

Dear Mr. Hanson:

On Monday, November 16, 2017, the U.S. Nuclear Regulatory Commission (NRC) will begin the

onsite portion of the Triennial Heat Sink Performance Inspection at your Braidwood Station,

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

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 9, 2017. By October 11, 2017, the inspector will communicate the 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 2, 2017. 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

November 13, 2017. 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.

B. Hanson

-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 Gerard ODwyer. We understand that our licensing

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

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

lead inspector at 630-829-9624 or via e-mail at Gerard.ODwyer@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/

Gerard ODwyer, Reactor Engineer

Engineering Branch 2

Division of Reactor Safety

Docket Nos. 50-456; 50-457

License Nos. NPF-72; NPF-77

Enclosure:

Triennial Heat Sink Performance

Inspection Document Request

cc: Distribution via LISTSERV

B. Hanson

-3-

Letter to Bryan C. Hanson from Gerard ODwyer dated September 29, 2017

SUBJECT: BRAIDWOOD STATION, UNITS 1 AND 2NOTIFICATION OF AN NRC

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION AND REQUEST FOR

INFORMATION; INSPECTION REPORT 05000456/2017004; 05000457/2017004

DISTRIBUTION:

Jeremy Bowen

RidsNrrDorlLpl3

RidsNrrPMBraidwood Resource

RidsNrrDirsIrib Resource

Cynthia Pederson

James Trapp

Richard Skokowski

Allan Barker

Carole Ariano

Linda Linn

DRPIII

DRSIII

ADAMS Accession Number ML17272A867

OFFICE

RIII

RIII

RIII

RIII

NAME

GODwyer:cl

DATE

09/29/17

OFFICIAL RECORD COPY

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

Enclosure

Inspection Report: 05000456/2017004; 05000457/2017004

Inspection Dates:

November 13 - 17, 2017

Inspection Procedure:

IP 71111.07, Heat Sink Performance

Lead Inspector:

Gerard ODwyer

630-829-9624

Gerard.ODwyer@nrc.gov

I.

Information Requested By October 9, 2017:

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 (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 2, 2017:

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.

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

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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.

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

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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 waterhammer 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 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.

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,

November 13, 2017:

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.

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

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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 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.

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

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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.

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 two completed performance tests, such as the American

Society of Mechanical Engineers in-service tests, for the 1B and 2A SX

pumps; and 1SX173, 2SX007 and 2SX136 valves and the results

documenting successful performance. 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 and results. 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 completed procedures and test results documenting adequate

performance of interface valves between the safety-related section of the

service water system and the nonsafety-related sections in particular with

respect to the leakage rate assumptions in the design basis calculations,

(e.g., UHS total volume assurance with leakage). 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 Triennial Heat

Sink Performance Inspection that inspected Inspection Procedure 71111.07,

Section 02.02.d.5(c) which was NRC Braidwood Inspection Report 2008005.

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

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e. Copies of the completed 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

NRC Braidwood Inspection Report 2008005.

If the information requested above will not be available, please contact Gerard ODwyer as soon

as possible at 630-829-9624 or e-mail Gerard.ODwyer@nrc.gov.