ML20127K709
| ML20127K709 | |
| Person / Time | |
|---|---|
| Site: | Hope Creek  |
| Issue date: | 01/14/1993 |
| From: | Green T GENERAL ELECTRIC CO. |
| To: | Trottier E NRC |
| References | |
| OG93-034-09, OG93-34-9, NUDOCS 9301260191 | |
| Download: ML20127K709 (7) | |
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- e GE Nuclear Energy OG93-034-09 January 14, 1993
$~O - 3 6f E. Trottier U.
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Nuclear Regulatory Commission Mail Stop 14D1 One White Flint North 11555 Rockville Pike Rockville, MD 20852
Subject:
SUPPLEMENTAL PLANT SPECIFIC MAIN STEAM LINE AND CONDENBER GEISHIC DESIGN EVALUATION The purpose of this letter is to transmit the subject supple-mental seismic design evaluation.
This procedure will be used to supplement Section 6.7 of NEDC-31858P, and may be referenced in your " draft" SER for the BWR Owners' Group lead plant (flope Creek).
If you have further questions regarding this subject please contact the undersigned.
Very truly yours, MW T. A. Green Sr. Technical Program Manager BNR Owners' Group Project Tel: (408) 725-1308 Mail Code 482 OG13/ TAG /ds cc R.
Beckwith, PSE&G l
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' I 220033 9301260191 930114 PDR ADOCK 03000354 P
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i Supplsmental Plant Specific Main Steam Line and Condenser Seismic Design Evaluation i
This evaluation supplements the seismic verification /walkdown procedure documented in Section 6.7 of NEDC 31858P, Revision 1, dated October 1, 1992.
The Section 6.7 verification will assure that failures will not occur due to; (1) excessive displacement of attached equipment on main steam lines i
(2) excessive displaecment of piping which results in loss of branch piping off of main steam lines (3) lost of piping supports on main steam lines and branch piping (4) turbine building or turbine building components that damage the alternate treatment piping pathway or condenser The supplemental evaluation will provide Bk'R turbine buildine design parameters, nining and suonort design parametera, and condenser deligD parametera compared on a plant specific basis to the' seismic experience database results (see Appendix D of NEDC 31858P).
-The opecific design parameters of interest are listed in the attachment.
The intent is to show that the Bk'R plant specific design attributes are represented and bounded by l
the respective seismic experience database attributes.
In addition, piping will be analyzed to demonstrate adequate design margin in order to assure that position piping retention will be maintained under normal and earthquake loadings, p,I adequate design margin will be demonstrated for typical - or bounding support designs.
This evaluation in addition to the Section 6.7 verification will provide reasonable assurance of the structural integrity of-these components, and will ensure that the possibility of significant failure in the event of a design basis earthquake is highly unlikely.
TAC 30/072892
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- l. SEISMIC AND WIND DESIGN HASIS FOR BWR TUR!l!NE DUILDINGS 1.
Turbine Building Lueral Forte Resisting Systern (LRT) Superstructure Type (Above Turbine Fkxx) e.g.
Moment Resisting Steel Frarne Steel Frame with Cross Bracing Reinforce Concrete Shear Wall etc.
2.
Turbine Building LRF Substructure Type (Below Turbine Floor) e.g.
Reinforcal Concrete Shear Wall Moment Resisting Steel Frame Reinforced Concrete Frame with infill watts etc.
3.
Seismic Design Codes e.g.
4.
Seismic Design Basis e.g.
UBC, Zone _, Stark load factor Static Analysis for PGA =
Dynamic AWsis for Spectra (Provide comparison of spectra and M)A on Figure 1) 5.
Wind Design Cafe e.g.
UBC, DOCA ANSI AS8.1,etc.
6.
Wired Design Basis e.g.,
Wind presant of W%d spealot Os mer.
SUO95-01/GE BWRCC 1
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- 11. PIPING & SUPPORT DESIGN BASIS Piping Design Code (e.g. ASME 831.1 & version) e Piping Design. For exh of the following Main Steam Line from the MSIV to Turbine Stop Valve Main Steam bypass to condensor and Drain path and interfacing piping to condensor provide:
Design temperature and pressure Site. sehedule, and/or D/t Typical support spacings (i.e.. D31.1 suggested spans)
Support types Design loadings (e.g., dead wt., thermal, selsmic transients, etc.)
Analysis Methods o
Simplified Approxirnate o
Static Finite Element (FE) o Spectral Dynamic F.E.
o Time History Dynamic F.E.
Seismic and Dynamic Design Basis o
No Seismic Design Basis o
Stade Coefficient o
Spectral (specify) 50095-01/GE WROG 2
- 2.,
o Transients (specify)
Pipe Support Design Code component Standard (e.g., ASME. B31.1, Mfgrs LCD, MSSP 58 etc.)
Linear & Plate & Shell(e.g., AShE, B31.1. AISC etc.)
For analhed lines such as the Main Steam Line from the MSIV to the Turbine Stop Valve and the Main Steam bypass to condenser lines, demonstrate that adequate design margins exist to provide reasoruble assurance that piping position retention will be maintained by the system dead weight supports under nonnal and carthquake loadings.
For lines designed by rule or by approximate methods such as the drain path and interfacing piping, demonstrate adequate design margins for typical or tounding support designs.
IIL CONDENSOR DESIGN DASLS Design Codes (e.g.,IIEl, ASTM. ASME, AISC, etc.)
Hydrostatic Test Requirement (e.g.,1.5 times design)
Condensor Anchorage Vertical. Uplift Capacity No bolts and size Horizontal. types and shear areas (e.g., fixed ranchor, guided or slotaed supports)
Condensor Manu0rturer Condensor Sire. Weight and Dimensions Condensor Type - (e.g., base supported, rectangular, single /&wbie pass)
Condensor Shell Material and Thickness Condensor Tube / Sheet Design Tube / Sheet hhtenal 50095-01/GE BWROG 3
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Tube / Sheet Thickness Tube Size. Length and Number Tube Suppon plates spring 1
Condensor Hotwell Capxity Condensor Expansion Joint Design I
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