ML20056C357
| ML20056C357 | |
| Person / Time | |
|---|---|
| Site: | 05200001 |
| Issue date: | 05/14/1993 |
| From: | Fox J GENERAL ELECTRIC CO. |
| To: | Poslusny C Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 9305200029 | |
| Download: ML20056C357 (2) | |
Text
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May 14,1993 Docket No. STN 52-001 I
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1 Chet Poslusny, Senior Project Manager Standardization Project Directorate Associate Directorate for Advanced Reactors and License Renewal Office of the Nuclear Reactor Regulation
Subject:
Submittal Supporting Accelerated ABWR Review Schedule - DFSER Open Item 3.7.2-2
Dear Chet:
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Enclosed is a modification to the GE response to DFSER Open Item 3.7.2-2 transmitted in my i
May 12,1993 letter. Note that Open Item 3.7.2-2 was mislabeled Open Item 3.8.4 1 in that letter.
Please provide a copy of this transmittal to Butch Burton.
Sincerely, h
Mck Fox Advanced Reactor Programs cc: Gary Ehlert (GE)
Norman Fletcher (DOE) l 100034 l
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'The D^ SS is designed to support the deadweight of equipment and piping. Since there l
are no safety-related equipment supponed on the DEPSS. The DEPSS is segregated into two sections.
One section supports the drywell cooling system and related chilled water piping, HVAC duct work, and work platforms. This system is classified as nonsafety-related.
The other section provides a support point for pipe hangers per subsection 3.7.3.3.4, and praides a.cupport point for pipe whip restraints. This section is classified as safety-related. The structural group will provide amplification factors to the piping group for those safety-related pipe support points that do not meet either the stiffness or displacement criteria found in subsection 3.7.3.3.4. Those beams and columns supporting pipe supports will carry piping dynamic loads while remaining elastic. Those beams supporting pipe whip restraints allow inelastic deformations due to pipe rupture loads. All safety-related items which the inelastic beam deformations may effect are evaluated to verify that no required safety function would be compromised.
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The stmetural acceptance criteria for the DEPSS are in accordance with ANSI /AISC-N690. If the frame type pipe support requirements of subsection 3.7.3.3.4 can not be met at some pipe supports locations, amplification actors will be developed for the ARS for the piping group.
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