ML12108A066
| ML12108A066 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities  |
| Issue date: | 04/14/2012 |
| From: | Joel Wiebe Division of Operating Reactor Licensing |
| To: | Gullott D, Bauer J, Mathews M Exelon Generation Co |
| References | |
| TAC ME8347 | |
| Download: ML12108A066 (2) | |
Text
1 NRR-PMDAPEm Resource From:
Wiebe, Joel Sent:
Saturday, April 14, 2012 1:07 PM To:
'David Gullott'; 'Joseph Bauer'; 'Mitchel Mathews'
Subject:
Quad Cities Unit 2 Relief Request I4R Additional Follow-up Question Regarding Reference 5 REQUEST FOR ADDITIONAL INFORMATION REGARDING QUAD CITIES NUCLEAR POWER STATION, UNIT 2 VESSEL PENETRATION RELIEF REQUEST NO. I4R-19 DOCKET NO. 50-265 (TAC NO. ME8347)
Flaw Evaluation RAI-7 The operating stresses were developed using an axi-symmetrical finite element model (FEM) to simulate the RPV-nozzle assembly. Provide sufficient information to demonstrate that use of the 2.5 times the RPV radius for the axi-symmetrical model is adequate to account for difference in the membrane stresses between the sphere and cylinder of the same thickness and radius in this application. Stating that, This value is based on experience with modeling similar geometries, is not sufficient.
Hearing Identifier:
NRR_PMDA Email Number:
339 Mail Envelope Properties (F371D08C516DE74F81193E6D891DC4AF8FE8C07CD9)
Subject:
Quad Cities Unit 2 Relief Request I4R Additional Follow-up Question Regarding Reference 5 Sent Date:
4/14/2012 1:07:16 PM Received Date:
4/14/2012 1:07:00 PM From:
Wiebe, Joel Created By:
Joel.Wiebe@nrc.gov Recipients:
"'David Gullott'" <David.Gullott@ExelonCorp.com>
Tracking Status: None
"'Joseph Bauer'" <Joseph.Bauer@exeloncorp.com>
Tracking Status: None
"'Mitchel Mathews'" <Mitchel.Mathews@exeloncorp.com>
Tracking Status: None Post Office:
HQCLSTR02.nrc.gov Files Size Date & Time MESSAGE 734 4/14/2012 1:07:00 PM Options Priority:
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