ML18082A355
| ML18082A355 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 04/18/1980 |
| From: | NRC COMMISSION (OCM) |
| To: | |
| References | |
| NUDOCS 8005120082 | |
| Download: ML18082A355 (2) | |
Text
~:.,,.,
ASSESSMENT OF FLOODPLAIN ASPECTS OF THE SALEM NUCLEAR GENERATING STATION DISTRIBUTION Docket File NRC PDR Local PDR NSIC TERA EP-1 Reading EP Reading DMuller WRoss CHaupt JMoore WRegan RBallard RCleveland EL i citra HRood GLear WBivins RGonzales I
OFFICE~ *................ *:......................................................................................
SURNAME~.............. ****:****.*.**.**.*. *1*
1 DATEr.*..*...... *******i*****.....................................................................................
'-----------~-**-----*
NRC FORM 318 !?-76) NRD.' 82.!:
~*
APR 18 i980 ASSESSMENT OF FLOODPLAIN ASPECTS OF THE SALEM NUCLEAR GENERATING STATION UNIT 2, DOCKET _NO. 50-311 All major plant structures were substantially complete at the time Executive*
Order 11988, Floodplain Management, was signed by President Carter in M~y 1977. These structures include the shared (with Unit 1) intake and discharge structures and the wave protection dike. It is our conclusion that consideration of-relocating those structures identified as being in the floodplain i~ neither requ~red nor practicable.
The 1 percent chance (loo* year) floodplain at the site is at elevation 9.0 feet Me~n Sea Level. ** Plant grade is 10.5 feet MSL, 1.5 feet above the 1 percent chance floodplain. Thus, most of the site and structures are apove the 1 percent chance floodplain. The ~hared intake and discharge structures and_ portions of the wave protection dike,.however, are below the l percent chance flood level. The Executive Order also suggests consideration of* impacts in tn~ 0.2 percent chance floodplain where critical facilities are involved. Salem has been designed to withstand the flooding effects of the Design Basis Flood, which is significantly more severe than the 0.2 percent flood (see the Safety Evaluation Report', *section 2.4.2).
We therefore conclude that neither the one -percent chance nor the 0.2 percent chance flood wi 11_ constitute a hazard to the nuclear plant..
We also conclude that the plant structttres in the floodplain will have negligible effect on water levels off the site during a flood event. This conclusion is baseduupon the small area of those structures in comparison to that of the Delaware estuary, which is over 2 miles wide at the site. In addition, large
- floods in the site vicinity result from storm surges, rather than river
- runoff, which are relatively unaffected by alterations in the floodplain.
Consideration of environmental values was addressed in the Final Environmental Statement (FES)~for the Salem Station.
No significant adverse impµcts were foundto result from the construction,and operation of the station. Certain actions to ensure protection of environmental values were set forth in the FES.
TheBe have been addressed in the license for Unit 1, the proposed-license for Unit 2,-an~ in the National Pollutant Discharge Elimination System permit issued for the 'station~ It is concluded, therefore, that there is no further action called for_ pursuant to the Floodplain Management Order to minimize harm or restore '~y-a 1 ues t_hat have been degraded by past actions or to ~f.'ese*rwe~
the natural flooqp1ains.
- NRC FORM 318 (9-76) NRCM 02-l()