Record of Telcon W/Bw Holmgren of Util & Ty Wang of Cygna on 870327 Re Soil Ultimate Bearing Capacity Beneath Vapor Container| ML20214J001 |
| Person / Time |
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| Site: |
Yankee Rowe |
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| Issue date: |
05/22/1987 |
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| From: |
Cheng T
NRC |
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| To: |
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| References |
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| NUDOCS 8705270584 |
| Download: ML20214J001 (1) |
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Category:TELEPHONE OR VERBAL CONVERSATION RECORD
MONTHYEARML20214J0011987-05-22022 May 1987
Record of Telcon W/Bw Holmgren of Util & Ty Wang of Cygna on 870327 Re Soil Ultimate Bearing Capacity Beneath Vapor Container
ML20214H9831987-05-22022 May 1987
Record of Telcon W/B Holmgren,J Haseltine,G Papanic, D Le Franeois,N Williams & M Russell on 870522 Re Acceptability of Analyses Performed Using Ycs Input & 100% SAMs
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1987-05-22
[Table view] |
Text
f. A
- o UNITED STATES 8 o NUCLEAR REGULATORY COMMISSION B ,E WASHINGTON, D. C. 20566
'+4 * * * *
- p AIAY 2 2 ;r7 50-029 RECORD OF PHONE CONVERSATION DATE: March 27, 1987 TIME: 2:00 p.m.
PARTICIPANTS: Thomas M. Cheng, NRC Bruce W. Holmgren, YAEC T. Y. Wang, CYGNA
SUBJECT:
USE OF NEW HIGH STRAIN SOIL SHEAR MODULES FOR SSI ANALYSIS OF YANKEE VAPOR CONTAINER
SUMMARY
OF CONVERSATION: YAEC/NRC/CYGNA/GEI held a meeting in Bethesda on March 24 to discuss soil ultimate bearing capacity (UBc) beneath the Vapor Container (VC). At that meeting we presented results based on dynamic analysis of the VC which used horizontal soil springs and a higher shear modulus. Previous analyses of the VC had not used horizontal soil springs.
Tom Cheng requested that we generate ARS at a selected point on the VC using both the old SSI Model without horizontal springs and the new SSI model with horizontal soil springs. On March 27 Cygna telecopied the ARS plots (3 components) to YAEC and NRC.
A general understanding was reached:
- 1. The new soil shear modulus was calculated based on the high soil strain value which is due to the relative large rotation of Vapor Container i footings.
- 2. This new soil shear modulus will be used for the Vapor Container SSI l analysis and for the evaluation of soil bearing capacity under Vapor Container footings only.
- 3. The floor response spectra generated from the new SSI analysis will be used for the MS/FW piping and support system reevaluation.
- 4. Staff concern regarding the effect of softer soil springs on other ,
analyses is resolved by this comparison. l l
8705270584 DR 870522 ADOCK 05000029 PDR DISTRIBilTION:
4 Central Files PDR LPDR f PD I-3 r/f I EMcKenna Tcheng GPapanic. YAEC '
MRushbrook
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