ML20214G684
| ML20214G684 | |
| Person / Time | |
|---|---|
| Site: | Columbia  |
| Issue date: | 04/14/1977 |
| From: | Bivins W Office of Nuclear Reactor Regulation |
| To: | Lynch M Office of Nuclear Reactor Regulation |
| References | |
| CON-WNP-0163, CON-WNP-163 NUDOCS 8605220398 | |
| Download: ML20214G684 (3) | |
Text
APR 1 4 1977 MEMORANDUM FOR:
M. D. Lynch, Light Water Basetors Branch #4, DPM FROM W. 5. Bivins, Leader, Rydrologie Engineering Section Hydrology-Meteorology Bramah, DSE SUBJECTt WIIF-2 ACCEPTA5CE REVIEW QUESTIONS PLANT NAME: WPPSg Nuclear Project 2 LICEWSING STAGE: OL DOCKET NO.: 50-397 REQUESTED COMPLETION DATE: April 8, 1977 REVIEW STATUS: Hydrologie Engineering Section (HMB) - Awaiting Easponses Enclosed are hydrologie engineering acceptance review questions for the subject plant, prepared by T. L. Johnsos., We find no basis for rejection of the application.
(s)
Willian S. Bivins, Leader Hydrologic Engineering Section Hydrology-Meteorology Branch Division of Site Safety and Environmental Analysis l
Enclosure:
DISTRIBUTION:
As stated DOCKET FILE (50-397)
ER RDG ac w/o anels DSE RDG R. Boyd HMB RDG W. Mcdonald J. Panenrolla ce w/enel:
D. Mullar V. Benaroya W. Casmaill J. Greeves F. Miraglia T. Johnson ST BC's l
Sc "Y,,
-;; v..
J t
DSE:ST_ M DSE:ST b Db[T[bB o,ne n,
TJohnsoYM DSchreiber WSBivins e......
v 4/12/77 4//3 /77 4/Af/77
..n >
NRC FORM 318 (9 76) NRCM 0240 W u. e. oov..mu.ut P.surine orrecs. sors - ese-ass 8603220398 770414 PDR ADOCK 05000397 A
HYDROLOGIC ENGINEERING ACCEPTANCE REVIEW QUESTIONS WNP-2 DOCKET NO. 50-397 1.
Provide a detailed post-construction topographic map of the site and surrounding area; figures 2.4-2 and 2.4-9 are not legible or of sufficient detail. The maps should clearly show (in addition to plant structures) the locations of streams, ditches, culverts, and other pertinent drainage features.
2.
Document that the roofs of safety-related facilities are capable of safely passing or storing the local PMP. Provide details of the roof design (drains, scuppers, parapets, etc.) and provide analyses to show the discharge capacity of drains, scuppers, etc.,
where applicable.
3.
Provide the basis for your derivation of Figures 2.4-10 and 2.4-12.
Since Figure 2.4-9 is not legible, it is not clear what actual area is considered in your 3.2-and 5.6-square mile drainage areas. In addition, it is not clear if Figure 2.4-12 was developed using storage, backwater, or slope-area calculations. Please clarify.
4.
Provide additional cross-sections (similar to Fig. 2.4-11) through the stream with the 38-square mile drainage area. The sections should be spaced closely enough together to allow independent evaluation of water surface profiles. The sections should be taken perpendicular to the direction of flood flow, not necessarily east-west or north-south and should show any changes to the sections due to plant construction.
. 5.
Document that the design basis groundwater level of 420 f t. msl is adequate to account for (a) seepage from the Ultimate Heat Sink spray ponds, (b) postulated rupture of the circulating water system (or any non-Category I) pipeline due to an earthquake, causing a rise in groundwater levels, followed by an af tershock, and (c) postulated rupture (single failure) of any Category I water-carrying pipe which penetrates or is in close proximity to a building wall. Document that safety-related structures are capable of resisting the hydrostatic and dynamic forces from an SSE, coincident with the water levels established in your analysis of (a) and (b), above, and that the structures can resist the hydrostatic forces established in your analysis of (c), above.
6.
Provide the results of a transient analysis to determine the adequacy of the UHS spray ponds under emergency conditions for both water k
temperature and volume requirements (See Reg. Guide 1.27, Rev. 2).
Provide the basis for any assumptions used in your analysis and a discussion of your analytical techniques.
l 7.
Provide a detailed description of the UHS spray ponds.
Include at least the following:
1 (a) a dimensioned plan view of the ponds with the locations of all sprays and discharge lines, and (b) locations of all intake and discharge structures in both plan and elevation.
S
, - -