ML19321B269
| ML19321B269 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 07/25/1980 |
| From: | Sylvia B VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | Harold Denton, Youngblood B Office of Nuclear Reactor Regulation |
| References | |
| 661, NUDOCS 8007300458 | |
| Download: ML19321B269 (2) | |
Text
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4 VIRGINIA Er.ucrHIC AND Powun Co>trAxv Rrenxoxa,V2 morn 1A 20261 July 25, 1980 Mr. Harold R. Denton, Director Serial No. 661 Office of Nuclear Reactor Regulation N0/RMB:smv Attention:
Mr. B. Joe Youngblood, Chief Docket No. 50-339 Licensing Branch No. 3 License No NPF-7 U. S. Nucicar Regulatory Commission Washington, D. C.
20555
Dear Mr. Denton:
MULTIPLE STRUCTURE ARS CONCERN NORTH ANNA UNIT NO. 2 In response to a verbal request from the NRC staff to Vepco, this will confim that Vepco will supply the following additional design data for the North.\\nna Unit No. 2 Low Head Safety Injection (LHSI) pump discharge piping stress pro-blem:
a.
Global coordinates of mass points b.
Stiffness of springs, snubbers, restraints, t'd supports, both trans-lational and rotational.
c.
Location and type of welds d.
Seismic displacements at anchor points e.
Themal displacements at anchor points f.
Thernal gradients for transients required for use in equations 10 and 11 of NB-3650 (governing thermal modes)
This information will supplement the design data forwarded previously in our letter Serial No. 647 dated July 27, 1980.
We will supply this additional information by July 30, 1980.
8007300g g
l vino:NEA EucTmc AND NWu COMPANY TO Mr. Harold R. Denton, Director.If you have any question or require any additional data on this subject, please contact NY. R. M. Berryman, Director - Technical Anclysis and. Control at 804-771-4697.
Very truly yours, B. R. Sylvia Manager - Nuclear Operations and Maintenance RMB/smv:SL2 cc:
Mr. Robert A. Clark, Chief Operating Reactors Branch No. 3 Division of Licensing Washington, D. C.
20555 Mr. James P. O'Reilly, Director Office of Inspection and Enforcement Region II Atlanta, Georgia 30303 h
l.
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