ML19208B062
| ML19208B062 | |
| Person / Time | |
|---|---|
| Site: | Vallecitos File:GEH Hitachi icon.png |
| Issue date: | 08/16/1979 |
| From: | Reid R Office of Nuclear Reactor Regulation |
| To: | Darmitzel R GENERAL ELECTRIC CO. |
| References | |
| NUDOCS 7909190009 | |
| Download: ML19208B062 (3) | |
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UNITED STATES NUCLEAR REGULATORY COMMISSION d,j ; O } h[
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August 16, 1979
%, *....,j Docket No. 50-70 Mr. R. W. Darmitzel, Manager Irradiation Processing Product Section Vallecitos Nuclear Center General Electric Company P. O. Box 460 Pleasanton, California 94566
Dear Mr. Darmitzel:
Based on our continuing review of the GETR seismic design information, we have determined that the additional information identified in the enclosure is necessary. Please provide this information as soon as possible.
Sincerely,
'b&
.n obert W. Reid, Chief Operating Reactors Branch #4 Division of Operating Reactors
Enclosure:
Request for Additional Infomation
.C in3 4h p, 7 909190 00% i
ENCLOSURE GENERAL ELECTRIC TEST REACTOR (GETR)
DOCKET NO 50-70 REVIEW OF REPORTS SUBMITTED IN RESPONSE TO NPC ORDER TO SHOW CAUSE DATED 10/24/77 REQUEST FOR ADDITIONAL INFORMATION ENGINEERING BRANCH DIVISION OF OPERATING REACTORS 1.
Describe the procedure used to envelope the computed floor response spectra.
2.
Verify that an earthquake smaller than the design 0.8tj earthquake would not produce a larger structural response than the design earthquake, taking into consideration the changes in damping values and other factors.
Provide the level of vibratory ground motion for which the reat. tor will be shut down and detailed investigations carried out to determine that no damage has occurred to safety related systems, prior to resuming operations.
3.
Provide information detailing how the modifications to the computer programs used in the analysis of the reactor building were qualified.
4.
You stated the re-analysis of the piping and RPV system was based on the original analytical model.
Did the mndel used in the piping and RPV systems re-analysis reflect the as built conditions?
5.
The calculation for the polar crane im;'act structures are for the end of the crarie impacting the structure.
In some conditions (perpendicular to the position shown in figure 2 of the document, " Structural Analysis of Third Floor Missile Impact System, General Electric Test Reactor")
the polar crane would be supported by the structure over the reactor itself and then only on one side of.the bridge girder.
Also, the polar
~ : crane can be supported by only one bridge girder on bent 1.
Provide your calculations to show the impact structures are capable of with-standing the impact of the polar crane for this condition.
6.
It appears that the polar crane can be in such a position that only one of the bridge girders will imoact the polar crane impact structure.
Show that the polar crane will not tcpple off the impact structure and the structure will support the crane with only one bridge girder resting
- n the suppcrting structure.
7.
The elastic half space theery used to cetermine soil sprirgs assumes that
- 9e fot.ndati:n slab is -igidly welded :: the elastic half space.
Provide
,: r bases f:r using a fraction of :Pe ::ntact area f:r :: uting the I 'l s r'#.05.
In a diti'n, CisCass *:v. the f ailure :f iorticr.s Of the i~;eCCEO sir.;;;ure le.g. fCundati0n nall5') affe:Is Ine elastic Salf spSCe
- .
- I 5 rin:s CevelC:e to EC Cunt fCr One e cec ~ent effects.
Pr vice a for incl; ding the effe:!s Cf tal em Edment, an CisCuss 3;ifica;5 P
- .e affe !s On One resulting str' glget Cnses if em eC ent effects c.ere not ccrsidereC.
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. 8.
Recent te'sts conducted by PCA (" Tests to Evaluate Coefficient of Static Friction Between Steel and Concrete, February 1979") indicate that the coefficient of friction between steel and concrete is lower than the value used in your analyses, and that the measured coefficient of friction for wet and dry concrete were different. Verify that the reactor building is stable and will not slide considering these reported friction values, and discuss the apprcpriateness of using the wet or dry values.
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