ML20235C384
| ML20235C384 | |
| Person / Time | |
|---|---|
| Issue date: | 09/23/1975 |
| From: | Paulson W Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20234E460 | List:
|
| References | |
| FOIA-87-40 NUDOCS 8707090399 | |
| Download: ML20235C384 (5) | |
Text
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c, n--u 4 NUCLEAR REG LATORY COMMISSION W ASHINGTON, D. C. 20555 h
, SEP 3 31973 /
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r PARTICIPANTS: GENERAL ELECTRIC COMPANY, TELEDYNE, AND ELECTRIC POWER RESEARCH INSTITlTTE
)
SUMMARY
OF MEETING TO DISCUSS LOADS BEING USED IN THE MARK I CONTAINMENT SHORT TERM INVESTIGATIVE PROGRAM s On August 21, 1975, a meeting was held in Bethesda with General Electric e
Company (GE), Teledyne, Electric Power Research Institute (EPRI)
'# representatives and the NRC staff. The purpose of the meeting was j to discuss the loads that are being considered in the firsp phase.
%[ i (short term program) of a program designed to evaluate the Maik I containment considering new loads that have been identified since the original design. Enclosure 1 is a list of attendees.
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SUMMARY
ic : c A. James, GE, summarized the primary LOCA loading phenomena shown in enclosure 2, and discussed the bases for concluding that the secondary loading phenomena shown on enclosure 3 are not likely to be sigrtificant.
GE representatives stated that they have recently run tests in a 1/12-scale model of a Mark I torus and measured the-gross loads on the torus.
This work was an extension of work performed by EPRI. These GE tests were run with an unvented model and showed that the compression effect dampens out pool swell seen in the earlier vented EPRI tests. 1 GE also stated that a probabilities analysis shows the following dis-tribution of downcomer lateral loads during steam condensation:
Downcomer Grouping Load per downcomer, kips One downcomer 5.5 I Group of 5 downcomers 4.47 !
Group of 12 downcomers 3.16 Group of 96 downcomers 1.72
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The NRC staff stated that there is a concern as to whether the condensation !
oscillatory loads which occur at a frequency of about 4 Hz could excite any components includin, ]
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1 L '0FFICECOPY t l 4.MJemove from AMSCice l
. .m j 8707090399 870623 PDR FOIA h sh THOMAS 87-40 PDR - -
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SEP t 3 375 1 GE stated that' the loads considered not likely to be significant (enclosure
- 3) have that been considered is significant. in combination to assure that there is no combinatio 1
GE also stated that seismic loads will be included in the short term program. j i
'alk~A. & \
Walter A. Paulson I Operating Reactors Branch #3 Division of Reactor Licensing
Enclosures:
- 1. Attendance List 2.- Loading Phenomena
- 3. Secondary Loading Phenomena cc w/encis: !
Mr. T. Keenan 1 Yankee Atomic. Electric Company "
Turnpike Road, Route 9 Westboro, Massachusetts 01581 i
8 9
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ENCLOSURE NO. 1 ATTENDANCE LIST MARK I CONTAINMENT MEETING - 8/21/75 i
GENERAL ELECTRIC COMPANY '
R. Vij L. J. Sobon A. J. James N. Shirley AEROJET NUCLEAR B. A. Bush L. L. W13eat TELEDYNE J. A. Hayward
,, ELECTRIC POWER RESEARCH INSTITUTE l
R. Gay NRC - STAFF W. Paulson R. Tedesco G. Lainas
-C.' Anderson J. Kudrick N. Su J. Guibert R. Cudlin R. Powell J. McMillen C. DeBevoc B, D. Lian I
J. C. Glynn A. Hafiz S. Brown G
.r,ii >, . -. . - . - - .....___._,__..m .
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, ENCLOSURE NO. 2 MARK I PESSURE SUPPES$10N SYSTEM PRIf%RY LOCA REATED LOADING PfBDBM INRR% TION PREVIOUSlY AVAll AM F e LOCA PESSURE AND 1BPERATUE CONDITIONS .
e REACTION FORCES Qi VENT SYSTEM o HYDR 0 STATIC
' e NEGATIVE PESSURE ON PRlf%RY CONTAINMBiT NEW INFO R TION .
e POOL SWELL LOADS ON VENT SYSTEM e POOL SELL LOADS ON EE TORUS i
i e DOWNCOMER lATEPAL LOADS DURING CONDENSATION O
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ENCLOSURU NO. 3
' SECONDARY LOADl!4G PHENOMENA tiOT LIKELY TO BE SIGNIFICANT
. NEGATIVE PRESSURE ON VEllT SYSTEM q
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INITIAL DRYWELL COMPRESSION WAVE ,
DRYWELL OVER-EXPANSION OSCILLATION WATER JET IMPINGEMENT ON TORUS POOL SWELL IMPACT, IMPillGEMENT, DRAG LOADS ON SMALL STRUCTURES ABOVE POOL ,
FALLBACK LOADS ,
POOL SWELL DRAG AND BUBBLE PRESSURE LOADS ON STRUCTURES IN POOL ASYMMETRIC MAIN 00WNCOMER CLEARING LOADS CONDENSATION OSCILLATION LOAD ON TORUS DOWNCOMER LATERAL LOAD DURING AIR CLEARING j
-AIR BUBBLE OSCILLATORY LOADS i
- i CHUGGING i
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