ML20127J282

Discusses Level of Design Detail for Sys 80+ Structures & Lists Expected Level of Completion

ML20127J282
Person / Time
Site:	05200002
Issue date:	01/15/1993
From:	Borchardt R Office of Nuclear Reactor Regulation
To:	Brinkman C ABB COMBUSTION ENGINEERING NUCLEAR FUEL (FORMERLY
References
NUDOCS 9301250091
Download: ML20127J282 (3)

Text

w.-.,

j{lt/O.7 AL a

[p New%

UNif[DSTATES

[', r ( 'i NUCLE AR REGUL ATORY COMMISSION g

I WA$mNG10N, D C. 20!66

,,,[,

January 15, 1993 Docket No.52-002 Hr. Charles B. Brinkman, Acting Director Nuclear Systems Licensing ABB-Combustion Engineering 1000 Prospect Hill Road Windsor, Connecticut 06095-0500

SUBJECT:

LEVEL OF DESIGN DETAll FOR THE SYSTEM 80+ STRUCTURES We are pleased to note that the staff and ABB-Combustion Engineering (ABB-CE)-

have identified a path to resolution for the CE System 80+ structural design-related issues.

However, the completion of the CE System 80+ structural design and analyses is on a critical path for design cert'fication and might lead to a delay in the fulfillment of the projected schedule for the issuance of the final safety evaluation report (FSER),

in order to ensure that sufficient design information is available to the staff to complete its FSER input in a timely manner, the staff will expect a certain level of completion of the structural design when the staff performs an audit of the design calculations.

The expected level of completion is as discussed below.

The design of all seismic Category 1 structures should be comnleted 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 structural elements including the building foundations, walls, structural frames, and structural plates and shells should be available in an 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 structure 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 findings, For safety-related structures or non-safety-related structures that house safety-related systems and equipment, design calculations should be completed, consistent with the CESSAR-DC commitments, to demonstrate the overall-integrity of these structures under governing loads and load combinations.

Also, the structural dynamic responses (including seismic floor response 9301250091 930115 Mf PDR ADOCK 0D20 2-A g,

a,,

________ _ D

~.. _ _

r

• i Charles B. Brinkman January 15, 1993

^

spectra of these structures at the locations of safety-related systems and equipment) and other structural loadings that are to be applied to safety-related systems and equipment should be completed.

The staff is planning on performing a structural audit of the CE System 80+

standard plant design in the early Spring of 1993. We request that ABB-CE expedite the completion of the System 80+ structural design to support this audit.

Sincerely, (Original signed ty)

Richard W. Borchardt, Acting Director Standardization Project Directorate Associate Directorate for Advanced Reactors and License Renewal Office of Nuclear-Reactor Regulation-cc:

See next page Q111RIEV11011:

Docket file PDST R/f TMurley/FMiraglia WRussell PDR DCrutchfield JPartlow, 12Gl8 RBorchardt TVWambach MXFranovich PShea JMoore, 15B18 EJordan, 3701 GGrant, ED0 ACRS (11)

AThadani 8E2 GBagcht, 7H15 SJLee, 7H15 RBarrett, 8H7 HMalloy JKudrick, 801 f,l!]btr--

A 1.-

0FC:

LA:PDST:ADAR PM

ADAR P O4Db,T:ADAR (A)D ST:ADAR NAME: PShea c iTS

/q[ifranovich:sg TWambach RBor rdt r

f DATE: 01/lg93 01//'/93 Ol//f/93 Ol// /93 0FFICIAL RECORD COPY:

DOCUMENT NAME: DESIGNLE.MXF L

t w-..,_'s,

,,Z-r-..,.

__,_,_,.__,,m,

.,.._,m,,

y

~,

_.,y c.

%.m.

.,,..,,.,__...._,,-ey...

.c y m.,

. _. _. _ _ _ __.._. ~ _._. _..

c

,s ABB-Combustion Engineering, Inc.

Docket No.52-002 cc:

Mr. C. B. Brinkman, Manager Washington Nuclear Operations Combustion Engineering, Inc.

i 12300 Twinbrook Parkway, Suite 330 Rockville, Maryland 20852 i

Mr. Stan Ritterbusch Nuclear Systems Licensing Combustion Engineering, Inc.

1000 Prospect Hill Road Post Office Box 500 Windsor, Connecticut 06095-0500 Mr. Daniel F. Giessing U. S. Department of Energy NE-42 Washington, D.C.

20585 Mr. Steve Goldberg Budget Examiner 725 17th Street, N.W.

Washington, D.C.

20503 Mr. Raymond Ng 1776 Eye Street, N.W.

Suite 300 Washington, D.C.

20006 4

4 6

.,,,,,,.-,-..y.w.'-n.,.

,+w,,,

.y w.,

y,,.,--

r.~,

,,-.-y_.-,

.,.a

,_w-,

-..m-3

-s--y-yv.

,yw--n-

. - -,, - -.,, - - -y

--