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THE FR ANKLIN INSTITUTE l RESEARCH LABORATORIES T i t ( P h O si t (? ! M 44R 1000
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January 7, 1974 773' Mr. J. C. McKinley Senior Staff Assistant Advisory Committee on Reactor Safeguards United States Atomic Energy Commission Washington, D. C.
20545
Subject:
Grand Gulf Subcommittee Meeting, January 17-18, 1974, San Jose, Cal.
Dear Sir:
At two previous meetings of the subject Subcommittee I raised a number of questions to some of which no satisfactory answers have been supplied as yet.
These are as follows:
1.
In the area of combustible gas conts! (the question originally raised by Mr. Bender) the feasibility of thc' exhaust of gas through suppression pool water should be evaluated.
2.
Show that it is adequate to consider the water on top of suppression chamber only as a rigid mass or propose some simplified non-rigid tredel1ing of It.
3 During the previous subcommittee ms.eting the effects of turbulence on various platforms were discussed. A sirnplified analysis.was suggested l
for the assessment of the adequacy. What is the status and the results of such an analysis at this time.
4.
Composite modal damping computational rationale has to be identified by the applicant.
5.
RMS definition when computing m'idal seismic response requires clarifi-cation and realignment of In te rp re ta t ion.
6.
Applicant submitted during the last subcommittee meeting a series of structural mathematical models, some of a significant sophistication.
I would like to ask the applicant to make a discussion of these models with the identification of the intended purpose for each of the same.
Sincerely, M(jit7 NM
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