ML20004E018
| ML20004E018 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 06/04/1981 |
| From: | Rajender Auluck Office of Nuclear Reactor Regulation |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8106100594 | |
| Download: ML20004E018 (6) | |
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4>[f 4/M Docket Nos.: 50-416 O
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JUN O 81981 * -
I MEMORANDUM FOR:
A. Schwencer. Chief. LBf2. DL ig com o.
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R. Auluck Prcject Manager. LBf2. DL M
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SUBJECT:
SUNRRY OF EETING WITH MISSISSIPPI POWER AND LIG COWANY AND BECHTEL POWER CORPORATION (MAY 27,1981)
A meeting was held in Gaithersburg. Maryland, on May 27, 1981. with Bechtel Power Corporation to discuss the independent structural analysis and the msults obtained by the NRC consultants EG&G. Mississippi Power
& Light did not attend the meeting. A copy of the meeting notice, meet-ing agenda and attendan a list are enclosed as attachmente A. B & C.
1 i
A.M. Session Bechtel started the meeting)with the description of their computer codes (CE 917F. CE 920 and CE 921 and their use in the seismic analysis for Grand Gulf Units 1 and 2.
Ken Lee of Bechtel explained how data for translational and mtational motions at the bases of the structures was extracted from these computer codes and transmitted to EG&G (NRC con-sultants) for seismic analysis.
It was also stated that Bechtel has reanalyzed part of the containmM. t,uilding structure by using BSAP com-puter code and using the data transmitted to EG&G. These two Bechtel analyses gave similar results thus confinring Bechtel's original analysis. Tommie Tho@ son and Richard Novak of EG&G explained their method &nd model for seis-mic analysis of containment building using ADINA computer code. EG&G results disagreed with the msults obtained by Bechtel but with the sign mversed on the rotational motion, the EG&G results agreed with the Bechtel results.
Them was a confusion concaming sign convention used in the data obtained from Bechtel computer code CE 920 and post processed for EG&G.
P.M. Session EG&G and Bechtel compared results for the auxiliary building analysis. Thers again, the results compamd very well when the sign was mversed for the 8106 100 W A
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rotational motu,a transmitted by Bechtel. After discussing with their technical spuinlist. Bechtel stated that sign convention, used in Bechtel GE 900 series computer codes is opposite to the sign conven-tion. used in Bechtel BSAP computer pmgram. Bechtel feels that they did not interpret the signs properly when extracting information from CE 920 coguter code for transmittal to EG4G.
Staff Connents Staff concluded that Bechtel should.do a s sple analysis which will check the pmper sign convention'. used in the Bechtel coguter codes.
In addi-tion. Bechtel will mspond to the action items (attachment D) generated at tne meeting.
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i R. Auluck, Project Manager Licensing Br' *.h No. 2 Division of L w eing I
I Attachments:
As stated I
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MEETING
SUMMARY
DISTRIBUTI0tl Docket.~ile T. Speis flRC PDR W. Johnston Local PDR J. Stolz NSIC S. Hanauer TERA W. Gammill TIC T. Murley LB#2 File F. Schroeder H. Denton D. Skovholt E. Case M. Ernst D. Eisenhut R. Baer R. Purple C. ilerlinge-B. J. Youngblood K. "niel A. Schwencer G. Knighton F. Miraglia A. Thadani E. Adensam D. Tondi G. Lainas J. Kramer R. Vollmer D. Vassallo J. P. Knight P. Collins R. Bosnak D. Ziemann F. Schauer R. E. Jackson 4-@h NRC Particicants:
Project Manager 1
Attorney, OELD N. Chokshi M. Service R. E. Lipinski OI&E (3)-
D. C. Jeng ACRS (16)
R. Tedesco G. Lear S. Pawlicki V. Benaroya Z. Rosztoczy bec: Applicant W. Haass Service List D. Muller R. Ballard W. Regan R. Mattson P. Check
- 0. Parr F. Rosa W. Butler W. Kreger R. Houston T. Murphy L. Rubenstein u
ATTACHMENT A
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UNITED STATES NUCLEAR REGULATORY COMMISSION o
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,I WASHINGTON, D. C. 20655
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MAY 2 21981 Docket Nos.: 50-416 and 50-417 MEMORANDUM FOR:
A. Schwencer, Chief, Licensing Branch No. 2, DL FROM:
Joseph A. Martore, Project Manager, Licensing Branch No. 2, DL
SUBJECT:
FORTHCOMING MEETING WITH MISSISSIPPI POWER AND LIGHT COMPANY AND BECHTEL POWER CORPORATION DATE AND TIME:
Wednesday, May 27, 1981 9:00 am LOCATION:
Bechtel Power Corporation 20 First Field Road Gaithersburg, Maryland PURPOSE:
To discuss the independent structural analysis and results.
PARTICIPANTS:
MP&LCo.
J. Richardson NRC J. Martore, F. Schauer, D. Jeng, R. Lipinski EG&G, Idaho T. Thompson Bechtel M. Archdeacon, R. Beck, M. Brooks J
7 m ii oseph A. Martore, Project Manager Licensing Branch No. 2 Division of Licensing r
cc:
See next page
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i Mr. J. P. McGaughy Assistant Vice President - Nuclear Production Mississippi Power & Light Company P. O. Box 1640 Jackson, Mississippi 39205 cc:
Robert B. McGehee, Esq.
Wise, Carter, Child, Steen & Caraway P. O. Box 651 Jackson, Mississippi 39205 Troy B. Conner, Jr., Esq.
Conner, Moore & Corber 1747 Pennsylvania Avenue, N. W.
Washington, D. C.
20006 Mr. Adrian Zaccaria, Project Engineer Grand Gulf Nuclear Station Bechtel Power Corporation Gaithersburg, Maryland 20760 Mr. Alan G. Wagner, Resident Inspector Route 2 Box 15,0 Port Gibson, Mississippi 39150 Mr. N. L. Stampley, 3r. Vice President Engineering, Production & Construction P.O. Box 1640 Jackson, Mississippi 39205 Mr. L. F. Dale Nuclear Project Manager P.O. Box 1640 Jackson, Mississippi 39205 Mr. John Richardson P. O. Box 1640 Jackson, Mississippi 39205 r
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ATTACHMENT B SEISMIC ANALYSIS FOR GRAND GULF UNITS 1 AND 2 Meeting Agenda (May 27,1981) i i
Subject
_ Speaker I.
Containment B6fiding b 1.
Presentation of computer' code capability.
Bechtel limitations and sign convention (Bechtel Code).
2.
The method of obtaining input at the base of containment structure as forwarded to Bechtel EG&G (including any data manipulation needed to obtain the input).
3.
Description of Bechtel findings'and fixes in Bechtel response to EG&G notification about the discrepancy of results (sign, time step, combination of-the two, etc.).
4.
Presentation of computer code capability, limi-EG&G tations and sign convention, etc. (EG8G).
5.
Description of the results of the dontainment EG8G structure seismic a a lysis.
6.
Description of the latest computer runs EG&G on containment structure with converging results.
7.
Discussion of basis for reversal of input EG&G & Bechtel data sign as implemented by EG8G.
8.
General discussion among the parties to Conferees determine any causes, other than already discussed, for the discrepancy of the seismic analysis results, Possible check run for containment as a stick a.
model on fixed base (by Bechtel model used in the EG&G runs.), identical b.
Other porsible dispositions be identified during discussion among the participating parties.
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Auxiliary Building 1.
Presentation of the analysis and comparison EGAG i
of results with Bechtel.
2.
Discussion of discreparecies of results Conferees (if any) 'and discussion of their dispcsitions.
I III. General I
General discussion of future action items.
Confereas i
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ATTACHMENT C r
SEISMIC ANALYSIS MEETING May 27, 1981 R. Auluck N. Chokshi' NRC/DL R. Peck NRC/DE J. T. Vogel Bechtel X. Lee Bechtel Tony Tocci Bechtel Richard Macek Bechtel I
Tomie Thompson EG8G Idaho i
R. E. Lipinski-EG&G Idaho D. C. Jeng..
NRC/DE/SEB i
F. Schaurer NRC/DE/SEB Ali Yazdf NRC/DE/SEB i
M. Archdeacon Bechtel Bechtel
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ATTACHMENT D g
MEETING MINUTES BETWEEN BECHTEL THE NRC AND EG&d (IDAHO)' HELD AT GAITHERSBURG POWER DIVISION ON MAY 27, 1981 i
At the conclusion of the above meeting, the following action items were identified and agreed to by all of the above parties:
i 1.
Bechtel will provide verification information to the NRC applicable to the CE 900 series computer codes as soon as possible. Bechtel will notify the NRC through J. Martore by June 1, 1981, of the 4
exact submittal date.
If the verification does not contain a l'
problem run all the way through all codes, one will be done.
2.
Bechtel will supply to the NRC a one or two page explanation of the l
- sign, convention in the CE 900 series codes and BSAP.
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3.
A test problem will be run by Bechtel in the'CE 900 series codes j
to verify results. Bechtel will give the problem parameters to EG&G and the NRC by Monday, June 1,1981.
a.
General consistency was found between BSAP, CE 900 series codes and M. EG&G will give Bechtel ADINA response spectra at i
r key points in the Containment and Auxiliary Buildings by l [(e,..,h=/M,<w Monday, June 1, 1981. Bechtel will plot BSAP and CE 900 series
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results on these ADINA spectra.
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After further review, Bechtel will provide rationale to the NRC'tojustifywhyreversesignonrotationacceleration[sisthe l
. + 4 of the time histories sent to b&G. 7,pe i.a G., %
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Bechtel will run the EG&G seismic model and pl,ot response spectra 4.
4 at locations specified by EG&G using BSAP to verify the EG&G results.
N.
EG&G will give in-put to Bechtel by June 1, 1981, on their model properties. EG&G will specify structural and response spectra damping to be used, and the analysis will be done using the Grand Gulf motion given to EG&G. An advance submittal of the results of this analysis t
will be sent to the NRC by June 8, 1981.
5.
Bechtel will submit to the NRC an explanatibn of the combinat!on of l
three components of earthquake by June 8, 1981. This explanatic, will include response spectra and other res onnes.
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Bechtel will submit to the NRC an explanation of how to determine composite modal damping by June 8, 1981.
vr Final resolution by the NRC of the technical issues addressed at this j
i meeting is pending submittal of all the above items by pechtel to the u/f NRC and NRC's subsequent review.
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