ML040770235
| ML040770235 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 01/29/2004 |
| From: | Alexion T Office of Nuclear Reactor Regulation |
| To: | Sharon Bennett Office of Nuclear Reactor Regulation |
| Alexion T W, NRR/DLPM, 415-1326 | |
| Shared Package | |
| ML040820923 | List: |
| References | |
| Download: ML040770235 (3) | |
Text
Thormas Alexion - EXPANSION OF QUESTION 5 - ANO-1 STEAM GENERATOR INSPECTION REPORT
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Thomas Alexion BENNETT, STEVE A 1/29/04 10:36AM EXPANSION OF QUESTION 5 - ANO-1 STEAM GENERATOR INSPECTION REPORT
- Steve, See the attached.
Tom
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EXPANSION OF QUESTION 5 - ANO-1 STEAM GENERATOR INSPECTION REPORT 1/29/04 10:36AM Thomas Alexion TXVA @nrc.oov Recipients entergy.com SBENNE2 (BENNETT, STEVE A)
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Size 5604 657 Date & Time 01/28/04 03:OOPM 01/29/04 10:36AM No None Yes Standard No None No Standard Immediate Delivered & Opened
Expansion of Question #5 from the Previous RAI Steam Generator Inspection Report Arkansas Nuclear One. Unit 1
- 1.
What is the acceptance criterion that is being used?
- 2.
What is the basis / derivation of the acceptance criterion?
- 3.
If the acceptance criterion is expressed in terms of post-accident dose or if the acceptance criteria was backcalculated from dose, please explain the significant assumptions and inputs that are used to calculate the dose from the measured leakage and vice versa.
- 4.
Are the methodology, assumptions and inputs of these analyses consistent with regulatory guidance for design basis accidents?
- 5.
Provide summary description of how the 1.87 gpm leak rate estimate was determined for LBLOCA. This should include the following information:
- a.
Does this estimate consider leakage from flaws other than circumferential cracks?
- b.
Brief description of method used to calculate leakage for circumferential cracks in the original roll or heat affected zone adjacent to the tube-to-tubesheet seal weld if no reroll is present.
- c.
Brief description of method used to calculate leakage for circumferential cracks at or below lower transition of original roll if no reroll is present.
- d.
Brief description of method used to calculate leakage for circumferential cracks at reroll repair.
- e.
Brief description of method used to calculate leakage for circumferential cracks inboard of reroll repair.
- f.
Brief description of method used to calculate leakage for circumferential cracks outboard of reroll repair. Are the portions of tubing outboard of reroll repairs subject to inspection?