ML20210T311
| ML20210T311 | |
| Person / Time | |
|---|---|
| Site: | Satsop |
| Issue date: | 02/03/1975 |
| From: | Harold Denton Office of Nuclear Reactor Regulation |
| To: | Deyoung R Office of Nuclear Reactor Regulation |
| References | |
| CON-WNP-1750 NUDOCS 8605300034 | |
| Download: ML20210T311 (3) | |
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S.9 NYDROLOGIC ENGINEERING.31TE;. 5UITABILITY. ISSUES;.:'.
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.. REQUESTED COMPLETI0lt DATE:. January 24. 1975 l
- DESCRIPTION OF RESPONSES:
Amendment to PSAR
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REVIEW STATU5;' Hydrologic Engineering Section
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'i Site Analysis Branch - Awaiting Response Enclosed are additional Hydrologic Engineering Site Suitability
' Issues, prepared by T. L. Johnson and D. L. Milliken. for your 8
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';needed due toEchange in the. design groundwater level; this change
'was submitted subsequent to the issuance.of our. initial site suitability issues.:
odginaisisned W N. R. Denten Harold R. Denton Assistant Director for Site Safety
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Provide an estimate of the seepage i
rate through the system and the c&l-culational bases used in your analysis.
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(4)
Provide pertinent design details and t
detailed drawings of the system, in plan and cross-section, showing the i
sizes, types, and locations of various drainage structures and exterior plant piping systems.
Show the drain-concrete wall interface for the vertical drains (if applicable).
(5)
Discuss the technical specifications (if applicable) outlining operating procedures to be used in the event that the groundwater drainage system does not function under al.1 expected ranges of natural phenomena and design events.
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You have not demonstrated that your ground-water d,rainage system will be capable of de-pressing and maintaining the groundwater level at or below your design elevation.
You should design the below-grade walls of safety-related buildings for a groundwater table elevation equivalent to plant grade, or substantiate j
that your groundwater drainage system will pre-vent the groundwater elevation from exceeding
.j your design level at all times.
If the latter alternative is selected, the following addi-l tional information must be supplied:
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(1)
Discuss the ability of the system to I
withstand various natural and accidental
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phenomena such as earthquakes, tornados, floods, and rupture of cooling water
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pipes inside or outside of safety-related buildings, and discuss the ability of the system to resist clogging.
(2)
Describe in detail both your proposed radiological monitoring program ~ of dis -
charges from the drainage system and your proposed mon,itoring program to detect system failure'.
Provide an esti-mate, and bases therefor, of the time available to mitigate the consequences, and describe in detail your methods of mitigation.
We will require that you conduct sufficient pumping tests.at enough locations to establish the ground-water level recovery time, that yo'u furnish the results of these tests, and justify the methods used in evaluating the pump-ing tests.
Provide the various important parameters such as permeabilities, trans-missivities, storage coefficients, draw-i down at various observation locations in the cone of influence, tabulations of l
l drawdown. ve rs us time, tabulations of well recovery versus time, and other pertinent i
data used in your analysis.
The pumping tests should be of sufficient number to describe the groundwater environment ex-isting throughout the entire expected cone of influence due to drawdown of ground-water levels as a result of your proposed l
drainage system.
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