ML20127P467
| ML20127P467 | |
| Person / Time | |
|---|---|
| Site: | 05200001 |
| Issue date: | 01/26/1993 |
| From: | Son Ninh Office of Nuclear Reactor Regulation |
| To: | Marriott P GENERAL ELECTRIC CO. |
| References | |
| NUDOCS 9302010293 | |
| Download: ML20127P467 (3) | |
Text
. - - - _ _ _ _ -.
/pm anog%,
UNITED STATES NUCLE AR REGULATORY COMMISSION m
{
l4
~
w AsmNG T Ced. D. C. 20555
%....+,/
January 26, 1993 Docket No.52-001 Mr. Patrick W. Marriott, Manager Lic.ensing & Consulting Services GE Nuclear Energy 95 Curtner Avenue San Jose, California 95125
Dear Mr. Harriott:
SUBJECT:
AUDIT Of THE ADVANCED BOILING WATER REACTOR (ABWR) STRUCTURAL DESIGN The Structural and Geosciences Branch is planning to conduct the fourth audit of the ABWR structural design on February 22-25, 1993.
The purpose of the audit will be to review the final detailed structural design calculations, to close out open items identified in the staff draft final saf ety evaluation report, and to address items identified in the last audit which was conducted in October 1992.
In order to ensure that sufficient design information is available to the staf f to complete the final safety evaluation in a timely manner, the staff expects a certain level completion of structural design as discussed below.
The design of all seismic Category I structures should be completed to a point where the structural analyses (both static and dynamic) for all governing loads and load combinations are essentially complete for all major load carrying structural elements.
The loads that must be resisted by all major load structural elements including the building foundations, walls, structural frames, and structural plates and shells should be available in auditable manner.
For seismic margins and severe accident behavior, the estimates for high confidence of low probability of failure and ultimate capacity should be available for structures and elements of structures that influence the staff's safety judgments in these matters. Details of connections of structures, welded joints, and reinforcements including shear reinforcements, are in general not required.
In the event that the loadings imposed upon the structures raises concern about the capability of a particular connection, reinforcement pattern or welded joint, the staff will identify the particular area of design for which more detail is needed to reach a safety finding.
For safetv-related structures and non-rafety-related structures that house safety-related systems and equipment, design calculations should be completed, consistent with the standard safety analysis report commitment, to demonstrate the overall integrity of these structures under governing loads and load combinations. Also, the structural dynamic responses (including floor response spectra for seismic and suppression pool hydrodynamic loadings for these struttures at the locations of safety-re'ated systems and equipment) and other structural loadings that are to be appl'ed to safety-related systems and equipmentshouldbecompitdO.3,a d
2$
fg3 X
,O 9302010293 930126 l.
PDR ADOCK 03200001 A
PDR s
9 i
Mr. Patrick W. Marriott January 26, 1993 It is suggested that you provide a copy of this letter to the Bechte' taff to facilitate understanding of staff expectations. We will issue a notice for this audit this month and provide a list of attendees.
Sincerely, Orig M S b od B y:
Son Q. Ninh, Project Manager Standardization Project Directorate Associate Directorate for Advanced Reactors and License Renewal Office of Nuclear Reactor Regulation cc:
See next page D1SIRIBUTION:
- Docket File PDST R/F TMurley/FMiraglia DCrutchfield WTravers RBorchardt JNWilson DR SNinh CPoslusny ACRS (11)
GGrant, EDO JMoore, 15818 PShea GBagchi, 7H15 TCheng, 7H15 Slee, 7H15 LShao, RES BHardin, RES J0'Brien, RES PM(fPDST:ADAR A6: DST:ADAR OFC:
LA:PDST:AD R PM:PDST:ADAR NAME: PShe F St4igh:tz CPoslusny
/ JtNIlson DATE: Olg )
Olf; /93 01/g/93 LO' p% /93 v
0FFICIAL RECORD COPY:
ABWRLT3.SQN
t GE Nuclear Energy Docket No.52-001 Mr. Robert Mitchell Mr. Joseph Quirk General Electric Company GE Nuclear Energy 175 Curtner Avenue Mail Code 782 San Jose, Cal.iornia 95114 General Electric Company 175 Curtner Avenue Mr. L. Gifford, Program Manager San Jose, California 95114 Regulatory Programs GE Nuclear Energy 12300 Twinbrook Parkway
'aite 315 Rockville, Maryland 20852 Director, Criteria & Standards Division Office of Radiation Programs U. S. Environmental Protection Agency 401 M Street, S.W.
Washington, D.C.
20460 Mr. Daniel F. Giessing U. S. Department of Energy NE-42 Washington, D.C.
20585 "r. Steve Goldberg Budget Examiner 725 17th Street, N.W.
Room 8002 Washington, D.C.
20503 Mr. Frank A. Ross U.S. Department of Energy, NE-42 Office of LWR Safety and Technology 19901 Germantown Road Germantown, Maryland 20874 Mr. Raymond Ng 1776 Eye Street, N.W.
Suite 300 Washington, D.C.
20006 Marcus A. Rowden, Esq.
Fried, Frank, Harris, Shriver & Jacobson 1001 Pennsylvania Avenue, N.W.
Suite 800 Washington, D.C.
20004 Jay M. Gutierrez, Esq.
Newman & Holtzinger, P.C.
1615 L Street, N.W.
Suite 1000 Washington, D.C.
20036
.