ML080350079

Notification of an NRC Biennial Heat Sink Performance and Information Request

ML080350079
Person / Time
Site:	Dresden
Issue date:	02/01/2008
From:	Ann Marie Stone NRC/RGN-III/DRS/EB2
To:	Pardee C Exelon Generation Co
References
Download: ML080350079 (8)

Text

February 1, 2008 Mr. Charles G. Pardee Chief Nuclear Officer and Senior Vice President Exelon Generation Company, LLC 4300 Winfield Road Warrenville IL 60555

SUBJECT:

DRESDEN STATION, UNITS 2 AND 3 - NOTIFICATION OF AN NRC BIENNIAL HEAT SINK PERFORMANCE INSPECTION AND INFORMATION REQUEST

Dear Mr. Pardee:

On February 25, 2008, the NRC will begin the on-site portion of the Biennial Heat Sink Performance Inspection at your Dresden Station, Units 1 and 2. This inspection will be performed in accordance with NRC baseline inspection procedure (IP) 71111.07. The heat exchangers selected for detailed review during this baseline inspection are 3A Low Pressure Coolant Injection (LPC1) Heat Exchanger and the 3B LPC1 Room Cooler.

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 two groups. The first group lists information necessary in order to ensure the inspector is adequately prepared for the inspection. This information must be sent to the following e-mail address, GFO@nrc.gov, no later than February 14, 2008, to ensure that we may review these documents before the on-site inspection. A hard-copy with the required information is also an acceptable option.

The second group of documents requested are those items which the inspector will review or need access to during the on-site inspection. 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 on-site inspection. Both groups of requests are only for the time period from the on-site inspection period back to the last Heat Sink Performance Inspection. If nothing addressing the request was done in that time period then the request applies to the last applicable document in the previous time period.

The lead inspector for this inspection is Gerard ODwyer. If there are questions about the material requested, or the inspection, please call him at (630) 829-9624.

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/

Ann Marie Stone, Chief Engineering Branch 2 Division of Reactor Safety Docket Nos. 50-237; 50-249;72-037 License Nos. DPR-19; DPR-25

Enclosure:

BIENNIAL HEAT SINK INSPECTION DOCUMENT REQUEST cc w/encl:

Site Vice President - Dresden Nuclear Power Station Plant Manager - Dresden Nuclear Power Station Regulatory Assurance Manager - Dresden Nuclear Power Station Chief Operating Officer and Senior Vice President Senior Vice President - Midwest Operations Senior Vice President - Operations Support Vice President - Licensing and Regulatory Affairs Director - Licensing and Regulatory Affairs Manager Licensing - Clinton, Dresden, and Quad Cities Associate General Counsel Document Control Desk - Licensing Assistant Attorney General Illinois Emergency Management Agency State Liaison Officer Chairman, Illinois Commerce Commission

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/

Ann Marie Stone, Chief Engineering Branch 2 Division of Reactor Safety Docket Nos. 50-237; 50-249;72-037 License Nos. DPR-19; DPR-25

Enclosure:

BIENNIAL HEAT SINK INSPECTION DOCUMENT REQUEST cc w/encl:

Site Vice President - Dresden Nuclear Power Station Plant Manager - Dresden Nuclear Power Station Regulatory Assurance Manager - Dresden Nuclear Power Station Chief Operating Officer and Senior Vice President Senior Vice President - Midwest Operations Senior Vice President - Operations Support Vice President - Licensing and Regulatory Affairs Director - Licensing and Regulatory Affairs Manager Licensing - Clinton, Dresden, and Quad Cities Associate General Counsel Document Control Desk - Licensing Assistant Attorney General Illinois Emergency Management Agency State Liaison Officer Chairman, Illinois Commerce Commission DOCUMENT NAME: G:\\DRS\\Work in Progress\\DRESDEN HS RFI GFO.doc 9 Publicly Available 9 Non-Publicly Available 9 Sensitive 9 Non-Sensitive To receive a copy of this document, indicate in the concurrence box C = Copy without attach/encl; E = Copy with attach/encl N = No copy OFFICE RIII RIII NAME AMStone for GODwyer: ls AMStone DATE 02/01/08 02/01/08 OFFICIAL RECORD COPY

Letter to Mr. C. Pardee from Ms. A. M. Stone dated February 1, 2008.

SUBJECT:

DRESDEN STATION, UNITS 2 AND 3 - NOTIFICATION OF AN NRC BIENNIAL HEAT SINK PERFORMANCE INSPECTION AND INFORMATION REQUEST DISTRIBUTION:

TEB RAG1 CXG1 RidsNrrDirsIrib MAS KGO JKH3 CJP3 CAA1 DRPIII DRSIII PLB1 TXN ROPreports@nrc.gov

BIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST Enclosure 1

Inspection Report: 0500237/2008002; 0500249/2008002 Inspection Dates:

February 25 - 29, 2008 Inspection Procedure:

IP 71111.07, Biennial AHeat Sink Performance Inspection@

Lead Inspector:

Gerard ODwyer (630) 829-9624, gfo@nrc.gov The following information is requested to be provided as specified below to support the biennial AHeat Sink Performance Inspection,@ IP 71111.07. If some of the activities are not performed by your program, please note that fact. Both groups of requested information is only for the time period from the on-site inspection to the last Heat Sink Performance Inspection. If nothing pertaining to the request was performed in that time period, the request applies to the last applicable document in the previous time period. Unless otherwise specified, all the below requests are for the selected heat exchangers (Hxs):

3A LPC1 Heat Exchanger; and 3B LPC1 Room Cooler.

I.

Information Requested Expeditiously

1.

For the specific heat exchangers listed above please provide the following:

Please provide the following information by February 14, 2008.

a.

Copies of the two most recent completed tests confirming thermal performance for those heat exchangers which are performance tested;

b.

Copy of system description and design basis document for the heat exchangers (as applicable);

c.

Copy of any operability determinations, functional assessments, or other documentation of degradation associated with the heat exchangers or the systems that support the operation of the selected heat exchangers;

d.

Copy of the Updated Final Safety Analysis Report (UFSAR) sections applicable for each heat exchanger;

e.

Provide a list of calculations with a description which currently apply to each HX; and

f.

Provide a list of corrective action program documents (with a short description) for the previous three years or since the last biennial heat sink inspection, whichever period is shorter.

BIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST Enclosure 2

2.

Listing of all the GL 89-13 AService Water System Problems Affecting Safety-Related Equipment,@ heat exchangers by risk significance.

3.

A list of corrective action program documents (with a short description) associated with and documented in your corrective action system (for the previous two years or since the last biennial heat sink inspection), for the ultimate heat sink?

4.

Copy of any self-assessment done on any of the licensee=s heat exchanger programs (e.g., Generic Letter 89-13 heat exchanger program) or on the sample heat exchangers.

5.

A schedule of all inspections, cleanings, maintenance, or testing of any GL-89-13 heat exchanger to be done during the on-site portion of the inspection.

6.

Copies of procedures developed to implement the recommendations of GL 89-13, (e.g., the GL 89-13 Heat Exchanger Program description).

7.

Updated Final Safety Analysis Report pages for the GL 89-13 Heat Exchanger Program.

8.

Maximum Containment Cooling Service Water (CCSW) system inlet temperature limit that still allows full licensed power operation of the nuclear reactor. Please provide the document that states this limit, (e.g., USAR or TRM) and the operating procedure that ensures this limit is not exceeded.

II.

Information Requested to be Available on First Day of Inspection We request that the following information be available to the inspector upon arrival at the site on February 25, 2008.

1.

For the specific heat exchangers listed above please provide the following:

a.

Provide the Design Basis Documents and Updated Final Safety Analysis Report pages for the selected Hxs;

b.

System health report(s) and maintenance rule system notebooks;

c.

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

d.

Copy of the vendor manuals including component drawings for each heat exchanger;

e.

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;

BIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST Enclosure 3

f.

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);

g.

Copy of the calculations or documents which evaluate the potential for water hammer or excessive tube vibration in the heat exchanger or associated piping;

h.

List of engineering-related Operator Workarounds/Temporary Modifications for these HXs since the last Heat Sink Performance;

i.

Copy of the evaluations of data for the two most recent completed tests confirming the thermal performance of each heat exchanger;

j.

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;

k.

Copy of heat exchanger performance trending data tracked for each heat exchanger;

l.

Copies of those documents that describe the methods taken to control water chemistry in the heat exchangers;

m.

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);

n.

The cleaning and inspection maintenance schedule for each heat exchanger for the next five years;

o.

Copy of the document describing the inspection results for the last two clean and inspection activities completed on each heat exchanger;

p.

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;

q.

Copy of the document establishing the repair criteria (plugging limit) for degraded tubes which are identified in each heat exchanger; and

r.

Information regarding any alarms which monitor on-line performance.

2.

For the ultimate heat sink, copies of the maintenance, operating or inspection procedures, and results of activities. Specifically:

BIENNIAL HEAT SINK PERFORMANCE INSPECTION DOCUMENT REQUEST Enclosure 4

a.

The toe of the weir or embankment inspection procedures and results;

b.

The rip rap protection placed on excavated side inspection, procedures, and results;

c.

Dam inspections that monitor the integrity of the heat sink were done; and

d.

Maintenance or inspection of inaccessible below-water portions of the UHS system including results of underwater diving inspections and assessment of sediment intrusion and/or removal of sediment, (e.g., inspections of Circulation Water Bays and UHS portions of intake and discharge canals).

3.

Copies of calculation or design documents demonstrating that UHS has sufficient reservoir capacity.

4.

Copy of modifications or other documents associated with design changes to the UHS.

If the information requested above will not be available, please contact Gerard ODwyer as soon as possible at (630) 829-9624 or email GFO@nrc.gov.