Document: NRC Regulatory Guide
Document ID: c7b1689b-ff17-4083-9fb1-f91b6965ea1a
Document Type: regulatory_guide
Title: Design Basis Floods for Nuclear Power Plants + HISTORY - HISTORY 02/2022 – DG-1290 , Proposed Revision 3 09/2014 – Periodic Review of Revision 2 – Revise 07/1980 – Errata to Revision 2 07/2024 – DG-1290 Revision 1 (Rev. 2)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0037/ML003740388.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.59
CFR Part: 
CFR Title: 

Content:
0SCOUAREMLE DRAINAGE0A AREA UNME NATURAL RIVER CONID"IMRS. ACCORDINGLY. j PU, VALUES OBTAINED 0o NOT INCLUDE POMSSBLE CONTRIMU. TrONS TO PEAK FLOW THAT WOULD RESULT FROM UPSTREAM DAM FAILURES OR OTHER UNNATURAL EV• ETOS. I I I• I I IZ3-• LI m o 190 1170 11 . 113ie • 1110 me 0 1070 105° 103 101° 99W w7° 95o 3 9 89w 070 or 0 3or FIGURE 8.3 PROBABLE MAXIMUM FLOOD (ENVELOPING PMF ISOLINES) FOR 500 SQUARE MILES K k -J 470 4v. 43. 41* 390 370 3s. 33. 310 29* 2r0 2SO 47r 470 [ 450 4V. 41 360 37. 33. 310 290 27r 2fie 121' 11g° 117 115° 113. I!I° 108' 1070 10° 103. 101° 9' 970 9i° 93w 91o 8w o 870 85. 83w FIGURE BA PROBABLE MAXIMUM FLOOD (ENVELOPING PMF ISOLIIES) FOR 1,000 SQUARE MILES -C 45. 43. 410* 30. 370 35p 33. 310 2B° 270 2r r - ISOLINE REPRESENTING PEAK FLOW OF PMF IN 1.000 CFS. NOTS: PiF ISOLWINS ON THIS CHART REPRESENT ENVELOPED VAL WEE OF PEAK RUNOFF FROM 1.Q0.04UARE MILE DRAINAGE LAiREA UNDER NATURAL RIVER CONDITIONS. ACCORDINGLY. IMF VALUES OBTAINED DO NOT INCLUDE POSSIBLE CONTRIBU TIONS TO PEAK FLOW THAT WOULD RESULT FROM UPSTREAM DAM FAILURES OR OTHER UNNATURAL EVENTS. I f I I I I A ! -- t ( .,p ImO GO - ISOLINE REPRESENTING PEAK FLOW OF PMF IN 1,000 CFS. ----- N ' al • a a a a a a I NOTE: PMF ISOUNES ON THIS CHART REPRESENT ENVELOPED VALUES OF PEAK RUNOFF FROM 5,000.SQUARE MILE DRAINAGE AREA UNDER NATURAL RIVER CONDITIONS. ACCORDINGLY, PMF VALUES OBTAINED DO NOT INCLUDE POSSIBLE CONTRIBU TIONS TO PEAK FLOW THAT WOULD RESULT FROM UPSTREAM D) FAILURE Off OTHER UNNATURAL EVENTS. a a a a a a a I -- - 1110 IO9 1070 100 103 1010 9 g7o 959 93 91m 90g or 0 8w 81° 790 770 75 FIGURE B.5 PROBABLE MAXIMUM FLOOD (ENVELOPING PMF ISOLINES) FOR 5.000 SQUARE MILES Q K "Ip Ga -"ISOLINE REPRESENTING PEAK FLOWOF PMF IN 11000 CFS. NOTE: PMF ISOLINES ON THIS CHART REPRESENT ENVELOPED VALUES OF PEAK RUNOFF FROM 10.OOO4OUARE MILE DRAINAGE AREA UNDER NATURAL RIVER CONDITIONS. ACCORDINGLY. PUF VALUES OBTAINED DO NOT INCLUDE POSSIBLE CONTRIBU. TIONS TO PEAK FLOW