ML060960106

Upcoming Steam Generator Tube Inservice Inspection

ML060960106
Person / Time
Site:	Saint Lucie
Issue date:	04/17/2006
From:	Moroney B Plant Licensing Branch III-2
To:	Stall J Florida Power & Light Co
Moroney B, NRR/DLPM, 415-3974
References
TAC MD1084
Download: ML060960106 (5)

Text

April 17, 2006 Mr. J. A. Stall Senior Vice President, Nuclear and Chief Nuclear Officer Florida Power and Light Company P.O. Box 14000 Juno Beach, Florida 33408-0420

SUBJECT:

ST. LUCIE PLANT, UNIT 2 - UPCOMING STEAM GENERATOR TUBE INSERVICE INSPECTION (TAC NO. MD1084)

Dear Mr. Stall:

Inservice inspections of steam generator (SG) tubes play a vital role in assuring that adequate structural integrity of the tubes is maintained. As required by the plant Technical Specifications, reporting requirements range from submitting a special report, within 15 days following completion of each inservice inspection of SG tubes, that identifies the number of tubes plugged and/or repaired; to submitting a special report, within 12 months following completion of the inspection, that provides complete results of the SG tube inservice inspection. The special report containing the complete results shall include the following:

1. Number and extent of tubes inspected.

2. Location and percent of wall-thickness penetration for each indication of an imperfection.

3. Identification of tubes plugged and/or repaired.

A phone conference has been arranged with members of your staff to discuss the ongoing results of the SG tube inspections to be conducted during the St. Lucie Unit 2 refueling outage.

This phone call will occur after the majority of the tubes have been inspected, but before the SG inspection activities have been completed.

Enclosed is a list of discussion points to be used in this phone conference. The staff plans to document a brief summary of the conference call, as well as any material that you may have provided to the staff in support of the call.

Sincerely,

/RA/

Brendan T. Moroney, Project Manager Plant Licensing Branch II-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-389

Enclosure:

List of Discussion Points cc w/encl: See next page

April 17, 2006 Mr. J. A. Stall Senior Vice President, Nuclear and Chief Nuclear Officer Florida Power and Light Company P.O. Box 14000 Juno Beach, Florida 33408-0420

SUBJECT:

ST. LUCIE PLANT, UNIT 2 - UPCOMING STEAM GENERATOR TUBE INSERVICE INSPECTION (TAC NO. MD1084)

Dear Mr. Stall:

Inservice inspections of steam generator (SG) tubes play a vital role in assuring that adequate structural integrity of the tubes is maintained. As required by the plant Technical Specifications, reporting requirements range from submitting a special report, within 15 days following completion of each inservice inspection of SG tubes, that identifies the number of tubes plugged and/or repaired; to submitting a special report, within 12 months following completion of the inspection, that provides complete results of the SG tube inservice inspection. The special report containing the complete results will include the following:

1. Number and extent of tubes inspected.

2. Location and percent of wall-thickness penetration for each indication of an imperfection.

3. Identification of tubes plugged and/or repaired.

A phone conference has been arranged with members of your staff to discuss the ongoing results of the SG tube inspections to be conducted during the St. Lucie Unit 2 refueling outage.

This phone call will occur after the majority of the tubes have been inspected, but before the SG inspection activities have been completed.

Enclosed is a list of discussion points to be used in this phone conference. The staff plans to document a brief summary of the conference call, as well as any material that you may have provided to the staff in support of the call.

Sincerely,

/RA/

Brendan T. Moroney, Project Manager Plant Licensing Branch II-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-389

Enclosure:

List of Discussion Points cc w/encl: See next page DISTRIBUTION:

PUBLIC LPL2-2 r/f RidsNrrDorlLplD RidsNrrPMBMoroney RidsNrrDciCsgb RidsNrrLABClayton RidsOgcRp RidsAcrsAcnwMailCenter RidsRgn2MailCenter KKarwoski, NRR GMakar, NRR Adams Accession No. ML060960106 NRR-106 OFFICE PM:LPL2-2 LA:LPL2-2 BC:LPL2-2 NAME BMoroney BClayton MMarshall DATE 04/6/06 04/6/06 04/17/06 OFFICIAL RECORD COPY

STEAM GENERATOR TUBE INSPECTION DISCUSSION POINTS PREPARED BY THE OFFICE OF NUCLEAR REACTOR REGULATION FLORIDA POWER AND LIGHT COMPANY SAINT LUCIE NUCLEAR PLANT UNIT 2 DOCKET NO. 50-389 The following discussion points have been prepared to facilitate the phone conference arranged with Florida Power & Light Company to discuss the results of the steam generator (SG) tube inspections to be conducted during the upcoming St. Lucie Nuclear Plant, Unit 2 refueling outage (SL2-16). This phone call is scheduled to occur toward the end of the planned SG tube inspection interval, but before the unit completes the inspections and repairs.

The staff plans to document a brief summary of the conference call as well as any material that is provided in support of the call.

1. Discuss any trends in the amount of primary-to-secondary leakage observed during the recently completed cycle.

2. Discuss whether any secondary side pressure tests were performed during the outage and the associated results.

3. Discuss any exceptions taken to the industry guidelines.

4. For each steam generator, provide a description of the inspections performed including the areas examined and the probes used (e.g., dents/dings, sleeves, expansion-transition, U-bends with a rotating probe), the scope of the inspection (e.g., 100 percent of dents/dings greater than 5 volts and a 20 percent sample between 2 and 5 volts), and the expansion criteria.

5. For each area examined (e.g., tube supports, dents/dings, sleeves, etc.), provide a summary of the number of indications identified to-date of each degradation mode (e.g., number of circumferential primary water stress corrosion cracking indications at the expansion transition). For the most significant indications in each area, provide an estimate of the severity of the indication (e.g., provide the voltage, depth, and length of the indication). In particular, address whether tube integrity (structural and accident induced leakage integrity) was maintained during the previous operating cycle. In addition, discuss whether any location exhibited a degradation mode that had not previously been observed at this location at this unit (e.g., observed circumferential primary water stress corrosion cracking at the expansion transition for the first time at this unit).

6. Describe repair/plugging plans.

Enclosure

7. Describe in situ pressure test and tube pull plans and results (as applicable and if available).

8. Provide the schedule for SG-related activities during the remainder of the current outage.

9. Discuss the following regarding loose parts:

• what inspections are performed to detect loose parts

• a description of any loose parts detected and their location within the SG

• if the loose parts were removed from the SG

• indications of tube damage associated with the loose parts

• the source or nature of the loose parts if known

10. Discuss the results of any secondary side inspections.

11. Discuss any unexpected or unusual results.

Mr. J. A. Stall ST. LUCIE PLANT Florida Power and Light Company cc:

Senior Resident Inspector Mark Warner, Vice President St. Lucie Plant Nuclear Operations Support U.S. Nuclear Regulatory Commission Florida Power and Light Company P.O. Box 6090 P.O. Box 14000 Jensen Beach, Florida 34957 Juno Beach, FL 33408-0420 Craig Fugate, Director Mr. Rajiv S. Kundalkar Division of Emergency Preparedness Vice President - Nuclear Engineering Department of Community Affairs Florida Power & Light Company 2740 Centerview Drive P.O. Box 14000 Tallahassee, Florida 32399-2100 Juno Beach, FL 33408-0420 M. S. Ross, Managing Attorney Mr. J. Kammel Florida Power & Light Company Radiological Emergency P.O. Box 14000 Planning Administrator Juno Beach, FL 33408-0420 Department of Public Safety 6000 Southeast Tower Drive Marjan Mashhadi, Senior Attorney Stuart, Florida 34997 Florida Power & Light Company 801 Pennsylvania Avenue, NW. Mr. G. L. Johnston Suite 220 Acting Vice President Washington, DC 20004 St. Lucie Nuclear Plant 6351 South Ocean Drive Mr. Douglas Anderson Jensen Beach, Florida 34957-2000 County Administrator St. Lucie County Mr. Bill Parks 2300 Virginia Avenue Acting Operations Manager Fort Pierce, Florida 34982 St. Lucie Nuclear Plant 6351 South Ocean Drive Mr. William A. Passetti, Chief Jensen Beach, Florida 34957-2000 Department of Health Bureau of Radiation Control 2020 Capital Circle, SE, Bin #C21 Tallahassee, Florida 32399-1741 Mr. C. Costanzo Acting Plant General Manager St. Lucie Nuclear Plant 6351 South Ocean Drive Jensen Beach, Florida 34957 Mr. Terry Patterson Licensing Manager St. Lucie Nuclear Plant 6351 South Ocean Drive Jensen Beach, Florida 34957