ML20087B262
| ML20087B262 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 12/18/1991 |
| From: | Schnell D UNION ELECTRIC CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| GL-88-20, ULNRC-2536, NUDOCS 9201130057 | |
| Download: ML20087B262 (4) | |
Text
vn p,o u,
o,-
?
I
- omul k hia rp Etucruic b December 18, 1991 U.
S.
Nuclear Regulatory Commission ATTN:
Document control Desk Mail Station Pl-137 Washington, D.
C.
20555 ULNnc-2536 Gentlemen:
DOCKET NUMBSR 50-A83 CALLAWAY PLANT INDIVIDUAL PIANT EXAMINATION OF EXTERNAL EVENTS METHOD AND SCliEDULE
References:
1.) NRC Generic Letter 88-20, Supplement 4, dated 6/28/91 In response to Reference 1, Union Electric will perform an Individual Plant Examination of External Events for Callaway making use of the following techniques:
1.
For Seismic Events the EPRI Seismic Margins Analysis (SMA) approach will be used..There may be deviation from specific aspects of the {sthodology because of the high seismic capacity of 'fh<
Callaway structures built per the SNUPPS design as d,iscusced in FSAR Sections 2.5 and 3.7 (B,N).
A "eview of the callaway plant seismic design basia is being conducted and the results of this review may allow us to screen out large portions of the plant as meeting the NUREG/CR-0098 seismic response spectra.
When the results of the review are complete they will be used to eliminate unnecessary steps in the SMA methodology.
2.
For Internal Fires the EPRI Fire Induced Vulnerability Evaluation (FIVE) methodology will be used.
3.
For High Winds, Floods, and Transportation and Nearby Facility Accidents the Screening Approach discussed in Reference 1 will be used.
I I'UOU3u
{A}!k I
i m un (prtilsa o~+ ev ;
\\
r
l cc:
T. A. Baxter, Esq.
Shaw, Pittman, Potts & Trowbridge 2300 N.
- Street, N.W.
Washington, D.C.
20037 Dr. J. O.
Cermak CFA, Inc.
18225-A Flower Hill Way Gaithersburg, MD 20879-5334 R. C.
Knop Chief, Reactor Project Branch 1 U.S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137 Bruce Bartlett Callaway Resident Office U.S. Nuclear Regulatory Commission RR#1 Steedman, Missouri 65077 J.
R.
Hall (2)
Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission 1 White Flint, North, Mail Stop 13E21 11555 Rockville Pike Rockville, MD 20852 Manager, Electric Department Missouri Public Service Commission P.O. Box 360 Jefferson City, MO 65102 Dave Modeon Nuclear Management & Resources Council 1776 Eye St N.W.
Suite 300 Washington, D.C.
20006-2496
r STNfE OF MISSOUlti )
)
Donald F.
Schnell, of lawful nye, bni nr1 firnt duly nworn upon enth anys that he in Genior Vice Pren1 dent-thiclear and an of ficer of Union Electric Cornpany; thnt he has road the foregoing document and knows the content thornof; that he har oxneuted the nnmn for and on behalf of nald company with full powrr and nathority to do no; and that the facts thernin st.ated at n true and correct to the bent of hin knowledon, information and belief.
Ily.
/
M Donald F.
Schnell Sonior Vice President IJucleat SUBSCR11RD and nworn to befor e rne thin,__18f'A day of Ummner 1991.
~---_
G. L. WM i3S n;,,7Any pusuc, si M t OF f.9sS0 W MY COMtMSSION fRiH1'S 369'3 St. LOUIS COulili i
,.A-U.0
- 1ucloor R:gulctory COnciccion P'
.2.
L<cember 18,.1991 At present we know of no additional site specific external events that need to be evaluated.
We expect to submit the results of the IPEEE in September 1995.
Our reason for scheduling a submittal date later than the June 1994 date requested by NRC is personnel constraints.
It is our intention to make maximum use of utility personnel in performing the IPEEE and the same pqrsonnel are currently involved in our IPE analysis.
Upon completion of the callaway IPE these people will be available to perform the IPEEE.
Thus, an extension on our submittal date will allow us to maximize utility involvement in the Callaway IPEEE.
In addition, personnel constraints will prevent us from performing an in-house peer reviww of the IPEEE.
It is our intention F
to utilize an outside agency to perform the peer review of our IPEEE.
Overall, we feel that this approach will allow us to prudently allocate our limited-Utility
~
resources.
Very truly yours, h44 nh
=
Donald F. Schnell CJD/ dis I
- , a,..,,..
._..,.,._._-,,._._._.__.a
,