Document: NRC Regulatory Guide
Document ID: bd0ffb9e-22f8-46a4-ab36-f5cffd435ed7
Document Type: regulatory_guide
Title: Assumptions Used for Evaluating the Potential Radiological Consequences of a Loss of Coolant Accident for Boiling Water Reactors (Rev. 2)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0037/ML003739601.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.3
CFR Part: 
CFR Title: 

Content:
give the ground level release atmospheric diffusion factors based on the parameters given in h(4). D. IMPLEMENTATION The purpose of the revision (indicated by a line in the margin) to this guide is to reflect current Regulatory staff practice in the review of construction permit appli cations, and the revised guide, therefore, is effective immediately. 2.032 X/Q =- Where x = distance from point of release to the receptor; other variables are as given in h(2). 1.3-4 10 10r5 0 U 10 102 J-. 4 - 4 .-    -j .1 If Att~ - i4i L47L * ...i . i. - -I 41 j f I -I- /HL F I - j I 1Z.LJ- --- J-4----------4-f~-, 4~ +~-4 L 77- - --4- 4 1 4 Lw bhi5ometer;¶1 I III p 12 1 - *t  - -14--p 5 meters4. 4-1 -,-- 4 -1- + -- 4 -1--i--1-1 -k Li -.4- U ---- 4--- 4- + - -4-- ± -1 -4--1--4---t- - 4.. 1 4-4- - + -s-- + -- 4 CF'I(PaqII Diffis~io' (T ssSow asryas.h -t-L ADS -j ~~~-.~~~~~.-4-~~~~~~~~~-~ 1 .I ~ 4-~-- -4-- - --- 4-4-4- 4 4--+--I- 4 14-14 ---- 4-- r 10 -j i-v 1tIf .4 -ij t- -4.- 4 ----I -J I --4--I II -4 10 Distance from Release Point (meters) 1.3-5 -4- !ILI I - -. - 4 -I- 4-I .4 4 j +- 4 I- I ~ ~ I K ELVTERLES -7-1;vh-75 meterst -7 10 -12 10 5 10 - S2Tm d~ 7 * I .I 1 I .L .•• ....... . . .. 1 . ELEVATED RELEASE :ATMOSPHERIC DIFFUSION FACTORS S8-24 HOUR RELEASE TIME. ~z1Iiii~d42b~c.. .. 1 -... LJL L7I:7t:. ................................................................ *1 * I. 103 105 Distance from Release Point (meters) 1.3-6 LZiIzt Bizz 10- LL C 0 - 01-I 10-k 101' IE "I I¸ i. : I . J'-!j`:'j171T;, p.ý C C I- . . . .. V4, T; 7 :j. 1;: L T:T. -v A :.wa- m... ts: 7 'wr VT -J. i f 11 Ta; -H T 4 ým w; 7W ýIzr, lit: tlý T: 777 v1! L ýi Ri; 'Tit ;7: v T T: 4.,:. 47: + 10 3; q E. :F Em T= ------ UM --- --- H7 Tý rr I iýt i4i,- 7777-77 i, T+I :7: L '-77 77 -w tý I" tit lp 14, TM L-,. 4,n mg tj a M IL 7; - T (,w/ow) DIXjom=d uoisnula I LX t'i.i 1V t II f%. 6 I 0 a. U 3 .5 E 0 T' c '9 a I- :1 Id :1 1 -L-L I.... I- - 10 10- U.1 fie 104I H ---4- ij ~TTI YE