ML20134J546
| ML20134J546 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 11/13/1996 |
| From: | Polich T NRC (Affiliation Not Assigned) |
| To: | Terry C TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| References | |
| GL-95-03, GL-95-3, TAC-M92233, TAC-M92234, NUDOCS 9611150260 | |
| Download: ML20134J546 (3) | |
Text
1 Mr. C. Lance Terry November 13, 1996 TU Electric i
Group Vice President, Nuclear Attn:
Regulatory Affairs Department P. O. Box 1002 Glen Rose, TX 76043
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION ON COMANCHE PEAK STEAM ELECTRIC STATION RESPONSE TO GENERIC LETTER 95-03, CIRCUMFERENTIAL CRACKING OF STEAM GENERATOR TUBES (TAC NOS. M92233 AND M92234)
Dear Mr. Terry:
1 On April 28, 1995, the Nuclear Regulatory Commission (NRC) issued Generic Letter 95-03, "Circumferential Cracking of Steam Generator Tubes." By letters dated June 27, 1995, and January 18, 1996, you provided information in response to the generic letter (GL) and to an NRC request for additional information (RAI).
The staff is currently in the process of documenting its review of GL 95-03 responses. During this process, the staff identified one additional question that had been asked of other plants with similarly designed steam generators as at Comanche Peak, Units 1 and 2, but had not been forwarded to you.
The staff requests, therefore, that you respond to the following question recognizing that the future inspections referenced in your original GL 95-03 response may already be complete:
Several plants with preheater model steam generators expanded tubes into the tube support plate in the preheater region to minimize the potential for vibration induced wear.
Since these expansions contain similarities to other expanded regions which have experienced circumferential cracking, discuss whether or not this area is susceptible to circumferential cracking.
If this area is susceptible to circumferential cracking, please submit the information requested in GL 95-03 per the guidance contained in the GL.
1 We request your response to our RAI within 30 days of receipt of this letter.
If you have any questions, please call me at (301) 415-1038.
Sincerely, ORIGINAL SIGNED BY:
Timothy J. Polich, Project Manager Project Directorate IV-1 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation Docket Nos. 50-445 and 50-446 j
cc:
See next page l
DISTRIBUTION:
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GHill (4)
ACRS TPolich (2)
JDyer, RIV PDIV-1 r/f CHawes (2)
CGrimes EAdensam (EGA1)
KKarwoski Document Name:
CP92234.RAI 0FC PH/PD4-1 LA/PD4-1 l
NAME TPolich/cf CHawesC#W DATE n /tt/96 W R/@/96 COPY YES/NO YES/NO 0FFICIAL RECORD COPY 9611150260 961113 PDR ADOCK 05000445 P
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UNITED STATES 3
NUCLEAR REGULATORY COMMISSION I*
f WASHINGTON, D.C. 2006M001 November 13, 1996 Mr. C. Lance Terry TU Electric Group Vice President, Nuclear Attn: Regulatory Affairs Department P. O. Box 1002 i
Glen Rose, TX 76043 j
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION ON COMANCHE PEAK STEAM ELEC STATION RESPONSE TO GENERIC LETTER 95-03, CIRCUMFERENTIAL CRACKING OF STEAM GENERATOR TUBES (TAC NOS. M92233 AND M92234)
Dear Mr. Terry:
On April 28, 1995, the Nuclear Regulatory Commission (NRC) issued Generic Letter 95-03, "Circumferential Cracking of Steam Generator Tubes." By letters dated June 27, 1995, and January 18, 1996, you provided information in response to the generic letter (GL) and to an NRC request for additional information (RAI). The staff is currently in the process of documenting its review of GL 95-03 responses. During this process, the staff identified one additional question that had been asked of other plants with similarly designed steam generators as at Comanche Peak, Units I and 2, but had not been forwarded to you. The staff requests, therefore, that you respond to the following question recognizing that the future inspections referenced in your original GL 95-03 response may already be complete:
Several plants'with preheater model steam generators expanded tubes into the tube support plate in the preheater region to minimize the potential i
for vibration induced wear. Since these expansions contain similarities to other expanded regions which have experienced circumferential cracking, discuss whether or not this area is susceptible to circumferential cracking.
If this area is susceptible to circumferential cracking, please submit the information requested in GL 95-03 per the guidance contained in the GL.
We request your response to our RAI within 30 days of receipt of inis letter.
If you have any questions, please call me at (301) 415-1038.
Sincerely,
[
Timothy J. Polich, Project Manager Project Directorate IV-1 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation Docket Nos. 50-445 and 50-446 cc: See next page
O e
Mr. C. Lance Terry TU Electric Company Comanche Peak, Units 1 and 2 cc:
Senior Resident Inspector Honorable Dale McPherson U.S. Nuclear Regulatory Commission County Judge P. O. Box 1029 P. O. Box 851 Granbury, TX 76048 Glen Rose, TX 76043 1
Regional Administrator, Region IV Office of the Governor l
U.S. Nuclear Regulatory Commission ATTN: Susan Rieff, Director l
611 Ryan Plaza Drive, Suite 400 Environmental Policy Arlington, TX 76011 P. O. Box 12428 Austin, TX 78711 Mrs. Juanita Ellis, President Citizens Association for Sound Energy Arthur C. Tate, Director 1426 South Polk Division of Compliance & Inspection Dallas, TX 75224 Bureau of Radiation Control Texas Department of Health Mr. Roger D. Walker, Manager 1100 West 49th Street Regulatory Affairs for Nuclear Austin, TX 78756-3189 Engineering Organization Texas Utilities Electric Company 1601 Bryan Street, 12th Floor Dallas, TX 75201-3411 Texas Utilities Electric Company c/o Bethesda Licensing 3 Metro Center, Suite 610 Bethesda, MD 20814 George L. Edgar, Esq.
Morgan, Lewis & Bockius 1800 M Street, N.W.
Washington, DC 20036-5869 l