ML20042A267
| ML20042A267 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 03/10/1982 |
| From: | Jackie Cook CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| 16243, NUDOCS 8203230266 | |
| Download: ML20042A267 (2) | |
Text
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C0i!SumBIS POWBf uo,e, w c.
f Vice President - Projects. Engineering and Constructiun General offices: 1945 West Parnall Road, Jackson, MI 49201 * (517) 78& O453 March 10, 1982 A
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p ts Harold R Denton, Director Office of Nuclear Reactor Regulation US Nuclear Regulatory Commission 4.
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Washington, DC 20555
- 'lN' MIDLAND PROJECT MIDLAND DOCKET NO 50-329, 50-330 SETTLEMENT OF UNDERGROUND DIESEL FUEL TANKS DUE TO SEISMIC SHAKEDOWN FILE: 0485.16 SERIAL:
16243
REFERENCES:
(1) M SILVER AND H B SEED, " BEHAVIOR OF SANDS UNDER SEISMIC LOADING CONDITIONS," FROM REPORT NUMBER 69-16 (DECEMBER 1969), COLLEGE OF ENGINEERING OF THE UNIVERSITY OF CALIFORNIA AT BERKLEY (2) R PIKE, H B SEED AND C K CHAN, " SETTLEMENT OF SANDS UNDER MULTIDIRECTIONAL SHAKING," JOURNAL OF GEOTECHNICAL ENGINEERING DIVISION, PROCEEDINGS OF THE AMERICAN SOCIETY OF CIVIL ENGINEERS, VOLUME 101, GT 4, PP 379-401, APRIL 1975 During the May 5, 6 and 7, 1981 meeting with the NRC Staff, a concern raised by the Corps of Engineers was discussed with the Staff relating to the potential for the seismic shakedown of the underground diesel fuel oil tanks and connected piping. This concern pertsins to the four or five feet of sand layer in the vicinity of the tanks and the effect of seismic shakedown on connected piping.
In accordance with the agreement reached in this meeting, an estimate of settlement was made for the loose sand layer indicated in Boring DF-5.
For Boring DF-5, refer to Figure 33-1 from Question 33, 10 CFR 50.54(f), Responses to NRC Requests Regarding Plant Fill. The estimate we have made below is based on the procedures suggested by M Silver and H B Seed in their publication identified in Reference 1 and the further modified procedure of R Pike, H B Seed and C K Chan in the publication of Reference 2.
The procedures involve using the relative density of sand as determined from standard penetration tests (SPT) and the relationships between shearing strain and vertical strain published by Silver and Seed in Reference 1.
In this calculation, a ground surface acceleration of 0.12g was used. The vertical displacement calculated from this procedure is then multiplied by three to account for multidirectional earthquake ground shaking as proposed by R Pike, H B Seed and C K Chan in Reference 2.
T 8203230266 820310
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4 Based on this method of evaluation, the estimated shakedown settlement of the layer of loose sand, as indicated in the Boring DF-5, is on. the order of l
- 0.04 inch.'
This small a settlement is insignificant and we have concliled that the small settlement is well within the design capability of the system.
JWC/RLT/dsb 1
CC Atomic _ Safety and Licensing Appeal Board CBechhoefer, ASLB MMCherry, Esq-FPCowan, ASLB RJCook, Midland Resident Inspector l
RSDecker, ASLB SGadler JHarbour, ASLB GHarstead, Harstead Engineering DSHood, NRC, (2)
DFJudd, B&W JDKane, NRC FJKelley, Esq RBLandsman, NRC Region III WHMarshall, Esq JPMatra, Naval Surface Weapons Center j
-W0tto, Army Corps of Engineers WDPaton, Esq SJPoulos, Geotechnical Engineers FRinaldi, NRC HSingh, Army Corps of Engineers j
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