ML20135C476
| ML20135C476 | |
| Person / Time | |
|---|---|
| Site: | Byron, Braidwood  |
| Issue date: | 12/05/1996 |
| From: | Levin A NRC (Affiliation Not Assigned) |
| To: | Dick G NRC (Affiliation Not Assigned) |
| References | |
| NUDOCS 9612060318 | |
| Download: ML20135C476 (3) | |
Text
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MEMORANDUM TO: George F. Dick Jr. Project Directorate Division of Reactor Projects III and IV FROM:
Alan Levin, Acting Section Chief Special Projects and Advanced Reactor Systems Reactor Systems Branch Division of Systems Safety and Analysis
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION TO SUPPORT BYRON AND BRAIDWOOD UNITS 1 AND 2 SGTR REVIEW.
Please transmit our additional request for information (Attachment 1),
relating a license amendment request for SG replacement extension for Byron Unit 1 and Braidwood Unit 1.
Attachment:
As stated cc:
J. Strosnider T. Sullivan
Contact:
David T. Diec, SRXB/DSSA 415-2834 DISTRIBUTION:
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Decem ber 5,1996 l
MEMORANDUM TO:
Dick George F. Jr I
Division of Reactor Projects HII and IV s
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Alan Levin. Acting Chief C
Special Projects and Advan dReactorSystems Reactor Systems Branch, DSSA
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SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION TO SUPPORT l
BYRON AND BRAIDWOOD UNITS 1 AND 2 SGTR REVIEW.
1 Please transmit our additional request for information (Attachment 1).
relating a license amendment request for SG replacement extension for Byron Unit 1 and Braidwood Unit 1.
Attachment:
i As stated cc:
J. Strosnider T. Sullivan
Contact:
David T. Diec. SRXB/DSSA 415-2834 l
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l ATTACHMENT i
1.
During a steam generator blowdown following a MSLB. the pressure drop across a tube support plate will be determined by the flow distribution across the plate.
The potentia'i for multidimensional flow exists and may be especially important at the uppermost tube support plate because of the difference in flow resistances between flows parallel and perpendicular to the tube bundles.
The flow resistance will be direction and position dependent at the tops of the U tubes. Assess the impact that multidimensional flows have on the pressure drop across the tube support plates.
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