ML041410147
| ML041410147 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 04/30/2004 |
| From: | Alexion T NRC/NRR/DLPM/LPD4 |
| To: | Davant G Entergy Operations |
| Alexion T W, NRR/DLPM, 415-1326 | |
| References | |
| Download: ML041410147 (3) | |
Text
Thomas AlexonI-FOR RELIEF REQUEST R&R-4 5I0I--
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I[Thomas Alexion - RAI FOR RELIEF REQUEST R&R-005&006 Page 1 From:
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Thomas Alexion DAVANT, GUY H 4/30/04 11:52AM RAI FOR RELIEF REQUEST R&R-005&006
- Guy, See the attached.
Tom CC:
SBENNE2@entergy.com
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RAI FOR RELIEF REQUEST R&R-005&006 4/30/04 11:52AM Thomas Alexion TNVA@nrc.gov Recipients entergy.com GDAVANT (DAVANT, GUY H)
SBENNE2 CC (SBENNE2@entergy.com)
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Size 3437 655 Date & Time 04/30/04 11:19AM 04/30/04 11:52AM No None Yes Standard No None No Standard Immediate Delivered & Opened
REQUEST FOR ADDITIONAL INFORMATION (REVISED 04/30/04)
RELIEF REQUEST R&R-005 AND R&R-006 ARKANSAS NUCLEAR ONE, UNIT 1 (ANO-1)
- 1.
Describe briefly the latest technical basis in support of Relief Request R&R-006, including the following items:
1 a.
Methodology - Discuss the steps of elastic plastic fracture mechanics (EPFM) approach; discuss the applicability of the EPFM for the ferritic reactor vessel head material in the flaw evaluation; and provide references.
1 b.
Assumptions - Discuss flaw size, flaw path; the applicability of the upper shelf energy value used for the ANO-1 reactor vessel head; and provide references.
1 c.
Results - Discuss the preliminary results in terms of safety factors, J applied, and J material values; and flaw growth.
1 d.
Preliminary Conclusion - Entergy needs to make a preliminary conclusion regarding whether the postulated flaw in the J-groove weld remnant will affect the structural integrity of the ANO-1 reactor vessel head.
- 2.
Entergy needs to make a preliminary conclusion regarding whether the nozzle repair proposed in Relief Requests R&R-005 and -006 will affect the reactor vessel head in maintaining the structural integrity and leakage integrity of the reactor coolant system.
- 3.
Entergy needs to commit to submit its final technical basis, including the flaw evaluation, by a certain date. Entergy had proposed June 1, 2004, in its April 12, 2004 submittal.