ML060030416

Request for Additional Information Related to the Steam Generator Tube Inspections for the 2004 Outage

ML060030416
Person / Time
Site:	Palisades
Issue date:	01/12/2006
From:	Padovan L Plant Licensing Branch III-2
To:	Harden P Nuclear Management Co
padovan L, NRR/DORL, 415-1423
References
TAC MC8606
Download: ML060030416 (5)

Text

January 12, 2006 Mr. Paul A. Harden Site Vice President Nuclear Management Company, LLC Palisades Nuclear Plant 27780 Blue Star Memorial Highway Covert, MI 49043-9530

SUBJECT:

PALISADES PLANT REQUEST FOR ADDITIONAL INFORMATION RELATED TO THE STEAM GENERATOR TUBE INSPECTIONS FOR THE 2004 OUTAGE (TAC NO. MC8606)

Dear Mr. Harden:

Nuclear Management Companys letters of October 20, 2004, and October 4, 2005, submitted steam generator tube inspection summary reports for the fall 2004 outage at Palisades Nuclear Plant. We are reviewing this information, and find that we need additional information as shown in the enclosed request for additional information (RAI). I discussed this RAI with Ms. Amy Hazelhoff of your organization on January 10, 2006, and she agreed to respond within 60 days of receipt of this RAI. Please contact me at (301) 415-1423 if you have questions.

Sincerely,

/RA/

L. Mark Padovan, Project Manager Plant Licensing Branch III-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-255

Enclosure:

RAI cc w/encl: See next page

January 12, 2006 Mr. Paul A. Harden Site Vice President Nuclear Management Company, LLC Palisades Nuclear Plant 27780 Blue Star Memorial Highway Covert, MI 49043-9530

SUBJECT:

PALISADES PLANT REQUEST FOR ADDITIONAL INFORMATION RELATED TO THE STEAM GENERATOR TUBE INSPECTIONS FOR THE 2004 OUTAGE (TAC NO. MC8606)

Dear Mr. Harden:

Nuclear Management Companys letters of October 20, 2004, and October 4, 2005, submitted steam generator tube inspection summary reports for the fall 2004 outage at Palisades Nuclear Plant. We are reviewing this information, and find that we need additional information as shown in the enclosed request for additional information (RAI). I discussed this RAI with Ms. Amy Hazelhoff of your organization on January 10, 2006, and she agreed to respond within 60 days of receipt of this RAI. Please contact me at (301) 415-1423 if you have questions.

Sincerely,

/RA/

L. Mark Padovan, Project Manager Plant Licensing Branch III-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-255

Enclosure:

RAI cc w/encl: See next page DISTRIBUTION PUBLIC OGC TKobetz DORL DPR CLipa, RGN-III LPLIII-1 R/F ACRS LPadovan THarris YDiaz-Castillo ADAMS Accession Number: ML060030416 OFFICE NRR/LPL3-1/PM NRR/LPL3-1/LA NRR/LPL3-1/(A)BC NAME LPadovan THarris TKobetz DATE 01/11/06 01/12/06 01/12/06 OFFICIAL RECORD COPY

Palisades Plant cc:

Robert A. Fenech, Senior Vice President Michael B. Sellman Nuclear, Fossil, and Hydro Operations President and Chief Executive Officer Consumers Energy Company Nuclear Management Company, LLC 1945 Parnall Rd. 700 First Street Jackson, MI 49201 Hudson, MI 54016 Arunas T. Udrys, Esquire Jonathan Rogoff, Esquire Consumers Energy Company Vice President, Counsel & Secretary 1 Energy Plaza Nuclear Management Company, LLC Jackson, MI 49201 700 First Street Hudson, WI 54016 Regional Administrator, Region III U.S. Nuclear Regulatory Commission Douglas E. Cooper Suite 210 Senior Vice President - Group Operations 2443 Warrenville Road Palisades Nuclear Plant Lisle, IL 60532-4351 Nuclear Management Company, LLC 27780 Blue Star Memorial Highway Supervisor Covert, MI 49043 Covert Township P. O. Box 35 Stephen T. Wawro, Director Covert, MI 49043 of Nuclear Assets Consumers Energy Company Office of the Governor Palisades Nuclear Plant P. O. Box 30013 27780 Blue Star Memorial Highway Lansing, MI 48909 Covert, MI 49043 U.S. Nuclear Regulatory Commission Laurie A. Lahti, Manager Resident Inspector's Office Regulatory Affairs Palisades Plant Nuclear Management Company, LLC 27782 Blue Star Memorial Highway Palisades Nuclear Plant Covert, MI 49043 27780 Blue Star Memorial Highway Covert, MI 49043 Michigan Department of Environmental Quality Waste and Hazardous Materials Division Hazardous Waste and Radiological Protection Section Nuclear Facilities Unit Constitution Hall, Lower-Level North 525 West Allegan Street P.O. Box 30241 Lansing, MI 48909-7741 Michigan Department of Attorney General Special Litigation Division 525 West Ottawa St.

Sixth Floor, G. Mennen Williams Building Lansing, MI 48913 November 2005

REQUEST FOR ADDITIONAL INFORMATION RELATED TO THE STEAM GENERATOR (SG) TUBE INSPECTION REPORT FOR THE 2004 OUTAGE PALISADES NUCLEAR PLANT DOCKET NO. 50-255

1. In a conference call with the Nuclear Regulatory Commission staff on August 31, 2004, Nuclear Management Company (NMC) indicated that rotating-probe inspections were to be performed on the square bend region of tubes surrounding tube R99C140 in E-50B. Please discuss the results of these inspections.

2. Table 1 of NMCs October 4, 2005, report indicates that various signals were reported as distorted support indications, non-quantifiable indications and DNI. Your submittal did not define the acronym DNI. Please define this, and clarify what indications are classified as DNI.

3. Table 1 on Page 3 of NMCs October 4, 2005, report, has a row titled "Supplemental" with a footnote 2. The footnote clarifies that "All DNI, DSI [distorted support indication], NQI [non-quantifiable indication], PLP [possible loose part] . . . , PVN [permeability variation] and new wear indications" were inspected. Apparently, NMC first inspected with a bobbing coil, found indications attributed to PLPs, and then supplemented its inspection of PLPs with a rotating coil. Please discuss whether a foreign object search and retrieval was performed on each SG, and whether the loose parts were removed. If the parts were not removed, or the locations were not visually inspected, please discuss the results of any evaluations performed to ensure these parts (or suspected parts) would not result in a loss-of-tube-integrity for the period between inspections.

4. For the single axial indications, please supply the following information:

a. Discuss the location of the flaw relative to the support structure (i.e., at support, or in free span).

b. Discuss whether there were any dents/dings at these locations. If so, provide the dent/ding voltage.

c. Discuss the severity of the flaws, and whether they initiated from the inside or outside diameter.

d. Discuss whether these indications were found with a bobbin or a +Point' coil.

5. A number of indications were reported in SGs A and B. Please summarize the mechanisms ENCLOSURE

responsible for these indications (e.g., wear at vertical straps, wear at tube eggcrate supports, etc.). Please provide your eggcrate support thickness (i.e., axial extent), and discuss how your eddy-current measurements are referenced. For example, does 2H +

0.85" indicate that the indication is 0.85-inch from the middle of the second hot-leg support?

In addition, please discuss whether any of the indications near the eggcrate supports are in the free span.

6. Please discuss the case of the single volumetric indications identified in R21C62 and R27C120 in SG E-50A. In addition, please discuss the severity of these indications.

7. Please confirm that all inspected tubes had adequate tube integrity at the time of NMCs last inspection.