ML19249E505
| ML19249E505 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 06/01/1978 |
| From: | Bivins W Office of Nuclear Reactor Regulation |
| To: | Thomas C Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7910010610 | |
| Download: ML19249E505 (3) | |
Text
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Dechet ::ca 50-4v JUN 011978 and N-4 J
UEUJPMDL11 FO.1:
Cecil Thoms, LPM,
Light Uater Peactors Ercach J1, DPit I?Olf:
- J1111m: S. ",1vina, Leader Hydrologic Engincaring Fection
'iydrolor,y-:*eteorology Granch, D5E CLJ ECT :
!;YICOLOGIC Ei:GIUPEP.lMG ACCEPTAfiCE TEVIEU QtESTIC';S PT. ANT UAE:
Cr.7nd Colf j
tacet '.taiLP.?S:~ 50-41f; and ';0-417 j
P.E'; n:U1' ALE r"'?;Ciir1,VilJl RI.QUr: SED COMPI.ZTIO?! DATE:
"ny 22, 1978 la.Vli:if STAiL'S: h aitIng ".caponce Pnclored aro hydroic;1c cncIncaring accept.' ace revicu questiona on the cub bet plcut prepared 1.y T. Jchncen.
'to find no baain for rejecLion of the applicatton.
Cri inalligneddf t
'i 1 : i. ; s, n,- u Willion S. Eivins, Leader liyJrologic Engineering Section E/ rology4'eteorology E. ranch d
Division of Site Safety and i
Environtental Analynis t
Enclosure:
DISTRIliUTION:
I Cucations DOCKET FILES (50-416/417) nan unc cc: v/ encl:
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. GRAND GULF HYDROLOGIC ENGINEERING ACCEPTANCE REVIEW QUESTIONS DOCKET No. 50-416/417 1.
Provide detailed drawings and plans of the site drainage system.
These drawings of the drainage channels, dikes, culverts, stilling basins, etc. should show (in both plan and profile) important features of the system. The data should include sizes, slopes, composition, elevations, cross-sections, detailed drainage-area outlines, erosion protection (where applicable), and the location t
of stream and drainage channels, For each drainage channel and/or culvert, provide your estimates (and bases, therefore) of time of concentration, rainfall intensity, PMF discharge, and PMF water level.
2.
Provide the details of the roof drainage system, including drawings of parapet walls, overflow scuppers, and drain pipes.
3.
Document that the design maximum groundwater Icvel of Elev. 109.00 ft MSL is conservative.
Since you have indicated that levels exceeding the design basis have occurred in the post, we cannot conclude that the level constitutes an acceptable design basis. Therefore, document that the level cannot be exceeded by any of the following postulated events:
a) normal or excessive rainfall (e.g., wet season) bt the site and recharge areas, b) rupture of the circulating water system pipeline inside or or outside the turbine building caused by an event such as an earthquake (SSE),
i 1032 ii
i 1 i rupture of service water system pipe due to a single failure, c) d)
local PMF at the site (if adequate time is availabic to establish seepage to the plant),
seepage from onsite reservoirs (if applicabic),
c)
I State the aaxinum groundwater lev <.ls that safety-related buildings h
4.
can withstand under (1) static conditions and (2) SSE loading conditions.
Pros I<5e a gr et m?wat er cont our -ap of the site area indicating 5.
expected groundwater conditions during the operating life of the plant.
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JUN 011378 3L1f p
-41f Docimt No3.>
5.
and
.) -617 MP.1:0PRIDICI FOR: Ceci1 Thomas, l.PM Light Rater Pcactora Prnnch #1, DPil FRO:4:
Williars S.
,1 vins, Lec&r liydrologic rngineerfn2 Section Tiydrolop,y-Wtcorologf Urnach, DSB SIT & LECT:
liYDROLOGIC 12:CINEFRH:C ACCCPTANCR "f. VIE'l QUESTIONS PLA'iT UN.'i:: Grand Gulf
~
DOCKET NU;2EPS: 50-416 and 50-417
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IU;SPO;;SII;LE ERA? CH: L'41#1 l
REQUESTED COMPLETIO:1 DATE: Hay 22, l')78 1m'i1EW STATUS: h alting Ecopanse Enclosed are hydrologic engineering acceptance reviev questions on the cubbet picnt prepared by T. Johncon. Uo find no basis for rejection of the n;. plication.
Original ~SI ned by E
'I!1'!c.S.,1,!t3 Villies S. Bivins, Leader Hydrologic Png.tucering Section IIydrology-?_:teorology Tranch Division of Site Safety and Envirerental Analysis Enclosurc:
DISTRIBUTIOS:
/
'N 4,aestions DOCKET FILES (50-416/-.be -):. -
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NRR RDG cc: n/ encl:
IIMS RDG
- 11. Cami).1 DSE RDG L. lia h n T. Johncon J.
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