ML040770135
| ML040770135 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 02/05/2004 |
| From: | Thadani M Office of Nuclear Regulatory Research |
| To: | Hicks J, Terrell J NRC/NRR/DE/EMCB, TXU Electric |
| Thadani M, NRR/DLPM, 415-1476 | |
| Shared Package | |
| ML040830346 | List: |
| References | |
| Download: ML040770135 (2) | |
Text
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1 Mail Envelope Properties (40226234.549:15: 21310)
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YOUR RESPONSE TO RAI RE: ALLOY 800 2/5/04 10:33AM Mohan Thadani MCT@nrc.gov Recipients txu.com jhicksl (Internet:jhicksl@txu.com)
Action Transferred Date & Time 02/05/04 10:33AM nrc.gov owf2_po.OWFNDO JBT CC (Joseph Terrell)
Delivered 02/05/04 10:33AM Post Office txu.com owf2_po.OWFNDO Delivered Route Internet nrc.gov 02/05/04 10:33AM Date & Time 02/05/04 10:33AM Files MESSAGE Options Auto Delete:
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Size 2770 No None Yes High No None No Standard Immediate Delivered & Opened
,'i I nayali - T UUM-MhrUI'JbNt: uJ MI-s ht-: ALLU Y UUU Page 1 From:
Mohan Thadani To:
Internet:jhicksl @txu.com Date:
215/04 10:33AM
Subject:
YOUR RESPONSE TO RAI RE: ALLOY 800 Jack:
In your response to NRC staff Question 9 in your [[letter::CPSES-200302528, Response to RAI Related to License Amendment Request 03-03, Revision to Technical Specification (TS) 5.5.9, Steam Generator Tube Repair Using Leak Limiting Alloy 800 Sleeves|letter dated January 8, 2004]], it was stated that the qualification program Included sixteen sleeve/tube assemblies with laboratory-grown stress corrosion cracks.
A.
Discuss whether any of these laboratory-grown stress corrosion cracks were situated in the portion of the tube that is adjacent to (i.e., behind) the sleeve's nickel band.
B.
If some of the cracks were situated behind the nickel band, (1) discuss the size and location of these cracks (i.e., were some of the cracks situated in a manner that would require the eddy current signal to pass through the nickel band in order for the cracks to be detected); (2) discuss the orientation of the cracks (e.g., axial, circumferential, etc.); (3) discuss the effectiveness of the eddy current inspection method in detecting these cracks, and (4) if the eddy current technique is not effective at detecting these cracks, discuss which method will be used for this inspection and the technical basis for this method.
C.
If some of the cracks were situated behind the nickel band, provide a methodology (and technical basis) for addressing the structural and leakage integrity for the sleeve/tube assembly, assuming that degradation (e.g., a 3600, 1 00% through-wall circumferential flaw) could be occurring in the portion of the tube that is adjacent to (i.e., behind) the sleeve's nickel band.
If you have any questions, please contact me.
Mohan (301) 415-1476 MCT@ nrc.Qov CC:
Joseph Terrell