ML20215E339
| ML20215E339 | |
| Person / Time | |
|---|---|
| Site: | Berkeley Research Reactor |
| Issue date: | 09/23/1964 |
| From: | Mark H CALIFORNIA, UNIV. OF, BERKELEY, CA |
| To: | Lowenstein R, Silver R US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML20215E220 | List:
|
| References | |
| FOIA-86-811 4684, NUDOCS 8612220163 | |
| Download: ML20215E339 (2) | |
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V Let Div bi Comp!!an~ce Department of Nuclear Engineering University of California Berkeley, California September 23, 1964 Mr. Robert Lowenstein
-4 Division of Civilian Application f-U. S. Atomic Energy Commission tl 1 Washington 25, D. C.
h hT Attention:
Mr. Richard Silver i
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Dear Mr. Silver:
D In response to your request of September 15, 1964, we are submitting the information attached as Amendment Na. 2 to our request for a construction permit for the Berkeley Research Reactor (Docket 50-142).
The response of the reactor structure to a force producing 0.5 g was calculated by Mr. R. R. Alvy, Chief Engineer for Holmes and Narver.
His letter is enclosed as Appendix I.
We hope that the enclosure will adequately provide the information which you require.
I Sincerely, f
Hans Mark Chairman HM:LR:bjd Enclosure l
State of California) i
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l County of Alameda
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2 Before me personally appeared MF //EL to me known to be the person described in the above application, who i
signed the foregoing instrument in my presence, and made oath before me to the allegations set forth therein, on the SIStiay of I
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Y HOLMES & NARVER, INC.
Engineers Constructors 828 South Figueroa Street Los Angeles, Calif. 90017 Telephone 627-4377 September 12, 1964 Mr. R. H. Peters General Dynamics Corporation General Atomic Division P. O. Box 608 San-Diego 12, California
Dear Mr. Peters:
In accordance with your request, the shield' structure for the Berkeley-TRIGA installation has received cursory review to determine the pos-sible effects of an earthquake with a horizontal acceleration of 0.5g.
Although not discussed previously, we have also included in our exami-nation the simultaneous effect of a vertical acceleration of 0.25g.
Our conclusions are summarized as follows:
1.
Soil pressures under the shield structure will exceed the dead load allowable of 9000 psf by only a small percentage.
2.
The factor of safety against overturning will be reduced to approximately 1.3.
This is considered adequate for the severe assumptions made.
3.
Stresses in the nosing and shroud may approach yield at certain localized areas.
It is extremely doubtful-1 hat a failure will occur of sufficient magnitude to cause loss of coolant.
4.
A considerable quantity of water will be ejected from the reactor pool.
The exact quantity cannot be determined, but is not expected to reduce the water level by more than' several feet.
Exposure of the core is extremely unlikely.
i 5.
Stresses in the channels suspending'the reactor core from the bridge may reach yield.
When this occurs, the natural period of the hangar system will change,and the stresses will reduce as a result.
Although permanent deformation of the hangars is most likely under an earthquake of the intensity assumed, it is doubtful complete failure will occur.
j Very truly yours, HOLMES & NARVER, INC.
/s/ R. R. Alvy R. R. Alvy Chief Engineer
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