ML11227A162

IR 05000456-11-005, 05000457-11-005 (Drs), on 11/28 Through 12/2/2011, Braidwood Station - Notification of an NRC Triennial Heat Sink Performance Inspection and Request for Information Inspection

ML11227A162
Person / Time
Site:	Braidwood
Issue date:	08/10/2011
From:	Ann Marie Stone NRC/RGN-III/DRS/EB2
To:	Pacilio M Exelon Generation Co, Exelon Nuclear
References
IR-11-005
Download: ML11227A162 (9)

See also: IR 05000456/2011005

Text

UNITED STATES

NUCLEAR REGULATORY COMMISSION

REGION III

2443 WARRENVILLE ROAD, SUITE 210

LISLE, IL 60532-4352

August 10, 2011

Mr. Michael J. Pacilio

Senior Vice President, Exelon Generation Company, LLC

President and Chief Nuclear Officer (CNO), Exelon Nuclear

4300 Winfield Road

Warrenville, IL 60555

SUBJECT: BRAIDWOOD STATION - NOTIFICATION OF AN NRC TRIENNIAL HEAT

SINK PERFORMANCE INSPECTION AND REQUEST FOR INFORMATION

INSPECTION REPORT 05000456/2011005; 05000457/2011005 (DRS)

Dear Mr. Pacilio:

On Monday, November 28, 2011, the U. S. Nuclear Regulatory Commission (NRC) will begin

the on-site portion of the Triennial Heat Sink Performance Inspection Braidwood Station. This

inspection will be performed in accordance with NRC baseline inspection procedure (IP)

71111.07T.

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 17, 2011. By

October 20, 2011, the inspector will communicate the initial selected set of approximately

2-3 risk significant heat exchangers.

• The second group of documents requested is those items 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 14, 2011. 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 Monday,

November 28, 2011. 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.

M. Pacilio -2-

The lead inspector for this inspection is Mr. Gerard ODwyer. If there are questions about the

material requested, or the inspection, please call Mr. ODwyer at (630) 829-9624. Please send

the information to the following e-mail address Gerard.ODwyer@nrc.gov. A hard-copy with the

required information is also an acceptable option.

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.

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.

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 10 CFR 2.390 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 NRC's document system

(ADAMS), accessible from the NRC Web site at http://www.nrc.gov/reading-rm/adams.html

(the Public Electronic Reading Room).

Sincerely,

/RA by A. Dunlop For/

Ann Marie Stone, Chief,

Engineering Branch 2

Division of Reactor Safety

Docket No. 50-456; 50-457

License No. NPF-72; NPF-77

Enclosure: TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT

REQUEST

cc w/encl: Distribution via ListServ

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

Inspection Report: 05000456/2011005; 05000457/2011005(DRS)

Inspection Dates: November 28 thru December 2, 2011

Inspection Procedures: IP 71111.07, Heat Sink Performance

Lead Inspector: Gerard ODwyer

(630) 829-9624

Gerard.odwyer@nrc.gov

I. Information Requested By October 17, 2011

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 three 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.

1 Enclosure

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

II. Information Requested By November 14, 2011

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

the GL 89-13 Heat Exchanger Program.

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

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

3. For the specific heat exchangers selected:

a. Copies of the applicable UFSAR sections 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.

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.

4. 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.

5. A schedule of all inspections, cleanings, maintenance, or testing of any

safety-related plant heat exchanger to be performed during the on-site portion of

the inspection.

6. Copies of Corrective Action Program implementing procedures.

7. If available, electronic copies of the current Technical Specifications, Technical

Specifications Basis, Final Safety Analysis Report, and Technical Report Manual.

2 Enclosure

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

III. Information Requested to be Available on First Day of Inspection, November 28,

2011

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. 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;

3 Enclosure

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

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); and

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

chemistry in the heat exchangers.

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

equivalent):

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

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;

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

potential strong-pump vs. weak-pump interaction; and

4 Enclosure

TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

g. 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.

h. Copies of the procedures to monitor, assess, and disposition active thru wall

pipe leaks, including structural evaluations and/or planned corrective actions.

i. 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.

j. Copies of the documents associated with the periodic inspection program

used to detect protective coating failure, corrosion, and erosion.

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

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.

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

as possible at (630) 829-9624, or email Gerard.ODwyer@nrc.gov.

5 Enclosure

M. Pacilio -2-

The lead inspector for this inspection is Mr. Gerard ODwyer. If there are questions about the material

requested, or the inspection, please call Mr. ODwyer at (630) 829-9624. Please send the information to

the following e-mail address Gerard.ODwyer@nrc.gov. A hard-copy with the required information is also

an acceptable option.

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. 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.

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 10 CFR 2.390 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 NRC's document system (ADAMS), accessible from the

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

Sincerely,

/RA by A. Dunlop For/

Ann Marie Stone, Chief,

Engineering Branch 2

Division of Reactor Safety

Docket No. 50-456; 50-457

License No. NPF-72; NPF-77

Enclosure: TRIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST

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DISTRIBUTION:

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OFFICE RIII RIII

NAME GODwyer:ls AMStone

DATE 8/ /11 8/ /11

OFFICIAL RECORD COPY

Letter to Mr. Michael J. Pacilio from Ms. Ann Marie Stone dated August 10, 2011.

SUBJECT: BRAIDWOOD STATION - NOTIFICATION OF AN NRC TRIENNIAL HEAT SINK

PERFORMANCE INSPECTION AND REQUEST FOR INFORMATION

INSPECTION REPORT 05000456/2011005; 05000457/2011005 (DRS)

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