ML060670170
| ML060670170 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 02/27/2006 |
| From: | Ann Marie Stone NRC/RGN-III/DRS/EB2 |
| To: | Crane C Exelon Generation Co, Exelon Nuclear |
| References | |
| Download: ML060670170 (4) | |
Text
February 27, 2006 Mr. Christopher M. Crane President and Chief Nuclear Officer Exelon Nuclear Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555
SUBJECT:
DRESDEN NUCLEAR POWER STATION INFORMATION REQUEST FOR AN NRC HEAT SINK PERFORMANCE BASELINE INSPECTION
Dear Mr. Crane:
On March 20, 2006, the U.S. Nuclear Regulatory Commission (NRC) will begin the required biennial inspection of heat sink performance at your Dresden Nuclear Power Station. This inspection will be performed in accordance with the NRC Baseline Inspection Procedure 71111.07. The heat exchangers to be reviewed in depth during the inspection are the 3A Reactor Building Closed Cooling Water (RBCCW) Heat Exchanger (HX) and the 3A Containment Cooling Service Water Vault Cooler.
In order to minimize the impact that the inspection has on the site and to ensure a productive inspection for both sides, we have enclosed a request for documents needed for the inspection.
The documents have been divided into two groups. The first group, list information necessary in order to ensure the inspector is adequately prepared for the inspection. This information should be available in the Regional Office no later than March 9, 2006. In so far as possible, this information should be provided electronically to the inspector.
The second group of documents requested are those items which the inspector will review or need access to during the 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.
The inspector for this inspection is Mr. Gerard ODwyer. We understand that our regulatory contact for this inspection is Mr. Joseph Griffin of your organization. If there are any questions about the material requested, or the inspection, please call the inspector at (630) 829-9624 or e-mail him at gfo@nrc.gov.
C. Crane 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). ADAMS is 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 License Nos. DPR-19, DPR-25
Enclosure:
Initial Document Request cc w/encl:
Site Vice President - Dresden Nuclear Power Station Dresden Nuclear Power Station Plant Manager Regulatory Assurance Manager - Dresden Chief Operating Officer Senior Vice President - Nuclear Services Senior Vice President - Mid-West Regional Operating Group Vice President - Mid-West Operations Support Vice President - Licensing and Regulatory Affairs Director Licensing - Mid-West Regional Operating Group Manager Licensing - Dresden and Quad Cities Senior Counsel, Nuclear, Mid-West Regional Operating Group Document Control Desk - Licensing Assistant Attorney General Illinois Emergency Management Agency State Liaison Officer Chairman, Illinois Commerce Commission
C. Crane 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). ADAMS is accessible from the NRC Web site at http://www.nrc.gov/reading-rm/adams.html (the Public Electronic Reading Room).
Sincerely, Ann Marie Stone, Chief Engineering Branch 2 Division of Reactor Safety Docket Nos. 50-237, 50-249 License Nos. DPR-19, DPR-25
Enclosure:
Initial Document Request cc w/encl:
Site Vice President - Dresden Nuclear Power Station Dresden Nuclear Power Station Plant Manager Regulatory Assurance Manager - Dresden Chief Operating Officer Senior Vice President - Nuclear Services Senior Vice President - Mid-West Regional Operating Group Vice President - Mid-West Operations Support Vice President - Licensing and Regulatory Affairs Director Licensing - Mid-West Regional Operating Group Manager Licensing - Dresden and Quad Cities Senior Counsel, Nuclear, Mid-West Regional Operating Group Document Control Desk - Licensing Assistant Attorney General Illinois Emergency Management Agency State Liaison Officer Chairman, Illinois Commerce Commission DOCUMENT NAME:ML060670170.wpd X Publicly Available G Non-Publicly Available G Sensitive X 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 E
RIII N
RIII N
NAME GODwyer:
MRing AMStone DATE 2/24/06 2/27/06 2/27/06 OFFICIAL RECORD COPY
C. Crane ADAMS Distribution:
GYS MXB RidsNrrDirsIrib GEG KGO DRC1 CAA1 DRPIII DRSIII PLB1 JRK1
Enclosure 1
Initial Document Request I.
Information Requested Expeditiously The following information is requested to be provided as soon as possible, but no later than March 9, 2006; to support the biennial Heat Sink Performance, IP 71111.07.
Unless otherwise specified, all the below requests are for the selected heat exchangers: the 3A Reactor Building Closed Cooling Water (RBCCW) Heat Exchanger (HX) and the 3A Containment Cooling Service Water Vault Cooler.
1.
copies of the procedures used to monitor, inspect, clean or test heat exchanger performance; 2.
a list of corrective action program documents, with a short description associated with heat exchangers, heat sinks, silting, corrosion, fouling, or heat exchanger testing, that are documented in your corrective action system (for the previous two years or since the last biennial heat sink inspection), this item is for all the Generic Letter 89-13 Hxs and the ultimate heat sink; 3
copy of system description and/or design basis document for the heat exchangers under review (as applicable);
4 copy of any operability determinations or other documentation of degradation associated with the heat exchangers or the systems that support the operation of the heat exchangers; 5
copy of any self-assessment done within last two years on any of the licensees heat exchanger programs (e.g., Generic Letter 89-13 program heat exchangers) or on the sample heat exchangers; and 6
a schedule of all inspections, cleanings, maintenance, or testing of any plant heat exchanger to be done during the on-site portion of the inspection.
II.
Information Requested to be Available on First Day of Inspection The following requests are only for the two HXs selected as samples unless otherwise stated. We request that the following information be available to the inspector once he arrives on-site March 20, 2006:
1.
copies of the two most recently completed tests confirming thermal performance for those heat exchangers which are performance tested. Include documentation and procedures that identify the types, accuracy, and location of any special instrumentation used for these tests. (e.g., high accuracy ultrasonic flow instruments or temperature instruments). Include calibration records for the instruments used during these tests; 2.
copy of the evaluations of data for the two most recent completed tests confirming the thermal performance of each heat exchanger;
Enclosure 2
3.
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; 4.
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);
5.
the clean and inspection maintenance schedule for each heat exchanger for the next five years; 6.
copy of the document describing the inspection results for the last two clean and inspection activities completed on each heat exchanger; 7.
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; 8.
copy of the document establishing the repair criteria (plugging limit) for degraded tubes which are identified in each heat exchanger; 9.
copy of the design specification and heat exchanger data sheets for each heat exchanger; 10.
copy of the vendor/component drawings for each heat exchanger; 11.
copy of the calculations or documents which evaluate the potential for water hammer or excessive tube vibration in the heat exchanger or associated piping; 12.
copy of heat exchanger performance trending data tracked for each heat exchanger; 13.
copies of those documents that describe the methods taken to control water chemistry in the heat exchangers; 14.
copies of the documents that verify the following for the ultimate heat sink:
sufficient reservoir capacity; functionality during adverse weather conditions, e.g., icing or high temperatures; and Recent inspection results for intake structure.
If the information requested above will not be available, please contact Gerard ODwyer as soon as possible at (630) 829-9624 or E-mail - gfo@nrc.gov.