ML20210G952
| ML20210G952 | |
| Person / Time | |
|---|---|
| Issue date: | 09/23/1986 |
| From: | Congel F Office of Nuclear Reactor Regulation |
| To: | Rosztoczy Z Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20209E138 | List: |
| References | |
| FOIA-87-10 NUDOCS 8609260015 | |
| Download: ML20210G952 (7) | |
Text
I s [e UNITED STATES j'
p, NUCLEAR REGULATORY COMMISSION O
.j WASHINGTON, D. C. 20555 9
j SED 2 31986 PEMORANDUM FOR:
Zoltan R. Rosztoczy, Chief Regulatory Improvement Branch, DSR0 FRON:
Frank J. Congel, Chief Reliability and Risk Assessment Branch, DSR0
SUBJECT:
DOSE CONSEQUENCES FROM CONTAINMENT VENTING Your memorandum dated September 11, 1986 (copy enclosed) requested sensitivity studies on results reported in my September 8,1986 memorandum to M. W.
Hodges, RSB/BWR, on the subject " Post-Accident Doses Off-site from Nable Gases."
Enclosed Tables A-E provide the scope and results of sensitivity studies performed in this branch (per your request) using the MACCS code with assistance from the Brookhaven National Laboratory.
MACCS runs were made for ten (10) cases of release of noble gases:
release of 100% of noble gases after 1, 2, 3, 4, 5, and 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> hold-up following scram; release of 50% of noble gases after 1, 2, and 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> hold-up following scrar:;
and release of 25% of noble gases after 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> hold-up following scram. These release scenarios with their other parameters are shown in Table A.
Other data or assumptions common to these MACCS runs were the same as in the earlier study: a) Core inventory of radionuclides of a 3412 Mwt LWR, b) One year's meteorological data for New York City, c) No offsite emergency response, d) Shielding pro'tection factors for normal activity, e) Uniform population density of 100 persons per square mile, and f) Exclusion area boundary (EAB) radius of 0.5 mile.
Table B shows the mean, median, and 95-percentile values of person-rem for the 10-mi and 50-mi regions. Table C shows statistics of early fatality radius (EFR). Fror Table C it appears that there is non-negli s",
to extend beyond EAB for Release Scenarios (of Table A)gible potential for EFR
- 1, 2, 3, 4, 7, 8, and 9, and that EFR would likely be inside EAB for Release Scenarios #5, 6, and 10.
Individual risk of early fatality as a function of distance is shown in Table D.
Risk of early fatality is virtually zero beyond 3.5 miles. Table E shows the mean, median and 95-percentile downwind individual dose as a function of distance.
All of the Release Scenarios studied may exceed the epa guidelines for evacuation to more than 5-miles.
For/1 M Dfo.
(c@yQ#LS~ &,pe
r
- 2. Rosztoczy Advance copies of Tables A-E have been given to Frank Coffman and Farouk Eltawila of your branch on September 22, 1986. You may contact Sarbes Acharya (x29738), RRAB, for any additional information. As a suggested bibliographical reference, please see pp. S20, S132-134 of the report of the APS Study Group on Severe Accidents at Nuclear Power Plants, Reviews of Modern Physics, Vol. 57 Number 3 Part II, July 1985.
l Trank J. Congel, Chief Reliability and Risk Assessment Branch
, Division of Safety Review and Oversight
Enclosure:
As stated cc:
R. Bernero D. Ross R. W. Houston G. Lainas L. G. Hulman M. W. Hodges T. E. Collins E. Jordan, IE J. Martin, RES T. Margulies, RES P. K. Niyogi, RES l
l t
~
~
J ^
..._. E... _i _ ' ~ ;, _
~- ~~
~J
~
~ ' - ~~- ~ ~ -
s 1 'aj% %
.1 d
%3 L.
edt.t f
zg,g
[C:fMI*4jI"1 M'
3 d444 d
3na
~
s! h 5
S i
~L s*
w t
i dO 4bwa y
gm n
'a a
s _ ~, w, fg-s e
e 3
O_
g.
4 H e4 m
- b u b oo e o
u
Tame R)
'Tdbtf 3ene-1% fe4%-Re~ dr~ 'A N M $soco ok At/M% <W Smkr P
4f Tc44.8 A -- - -
~
W TyW %~ Mth/ lou fetSen %
Sw'o g2,/A4
[*'k)
Vow Melieu q S ?es.MQ 1
Lo 1.s'F(9)V J.16(m 31scA)
~
3 50 3 M h) a L4 (4)
S.14(4)
-.2 10 8 57(s) 7 41(3) 2,sq(4) sv L 4s(4)
.L.33 (4)
.3.13 (+)
s to s~.5s(s) 4 6t.1(a) 1 4 i C+)
so 9 48n) 7.eV(3)
Lot (4) 4-10 3.'Mi>>
3..ts(3)
I.4(4) l so G Sils) 9.sy(3) l 74 c4-)
l 7 I4 (3
~.L C4) ) -
s2. l9 ((3)3 9e s)
T 10 2 6R3]
~
50 4 70(3) i 10
.i. 9G(s)
. t, 67 (3)
- g. o 1 (g) 50 3 51(3) 3..n C3) 8 21 O )
4.8(o(s)
T o4(3)
I. 8's-(4) 10 7
50 113(4) i.12(4) 29 TCz) 4 2 8 (3)
S 10 34s(3) p.g7 ((3) l ss~(4) 5v S.64(3) 5 32 3)
Jf..)g(3))
3.b1((3))
1 37-l4))
9 10
+.1G(2 (d G6 3
l 82 O-SD
)
E ' A3 (U l'I$ '
E '.N (C3) 4
'2-0 (3)
~LC4)
A0 10 4 74
$0
> 1. s'J C4) = L. 37 xio+
~'
Ta4d C
~
Ra b ee % i r M k &
Rd uoe 4 wo w er a s d ' W i b a u % g & ra u b %
%o ~ W bv 6 4
.u Ac..x+..J,d49
-Q'"0 ti Mu F<Mg qs 9muAq 14) k w ?>d. vi d v b 4 F 4 5
(+3
%Au A
56K*)"
- 3(s)-
p,_2 g(-1]
2 72(2) w)
3, s gG2) 3 b d S' C2) 2Cv
- j. ag c-2,)
ll 3.G3(t) f(s) 1.3g ( 2) g 869 (*)
3 (2-)
2.o?(~1)
~
[
1 13(o)
.3 (2-)
2 8 3 c-3) f 1 b^4 (2) 2-(3)
.) 3 8 G1) 9 2 87(.L) 1(3) -
l'38(~1) 9 S~ 34 (.i)
.i (3)
I. 6/C-2) 10 8.b1[0) 3 (2-)
2.o7(-2)
>- s. 66g).- s~. u x w -
i raasasxopasws4~ w 4 m i'
l bgana 4A (484Aho SY'At $ '844 $
A.f fu ec4 %
I g %'fjamuz (0'Sk EC Eeke W 3 V
- c5S) 4 j
i 0YW L0M 20 w'
3 o w' 1P
.I%)Y.0
%(4 3$4) 7&L)14!&2) 24M-9 7(-1)
L SF2) 111(4) ;r(-5) 13g &1) 1 3
.2 Ir*l2(4)10 2.tM-)3f.g(-y.3(-1) I.atV2 14tr(4) J.(1)
}. sg(1 1
g l
3 i.24(-2) 1(L) 2'8d) 1 50(-4) 3 (- 2 /*3 8 &4 #4) l&3)
S'"IlJ 1)
S.o8(3) 1(-L).18)(-3)1 1964) 7(-9 /*.W $ 2
-o-4
> (
- ~
Ay 9 4r(-4).p(-1).t4s(-pll mfd 7F3) S*l4W*^
V f
pp(.5) 7(y.t.g3(-) <
-o -
- C 0-3 f e
7
$.$4(4 7(-1) 1.'11(-) 2 93&b) Af I'.38(f1 1 3(A)1(~3]
S'NI'Yf
=~
N g
i*3S(-)) Y(-$ 3 8)(-) 8*8 7 (~ S) W 3) l' WW
=
? #
Y 1.o1(-9 aH) 113() 2.xv9 ic-1) 1.g; <
0
=
=
^
q 1
LO ll25(4) 3(4) hty-f 94(4)
R1) SlH$+
^
e-r i. soc-9, = 1. erin L
i
}iti}hiltii%@ Hit ~ 4 tilltRN $li S t t. il a a a m u a u am ~a ' Ft bt $4ehM V4( g%?{ Y* M Nbhl khNIDI bb }$ 3-Ridi h M _%Oin i a i m u n w m is g F TR itt$tV 4F $y FW {L h k 1{ 4 h~MID_ib41 3-
- t d
a u i i F.3 pl p# igpF ETt'541g 1 m li~ttd th il@{gl Ya a J! a % $_gsyit ia&*4$ wg =- m
- k%
e N dx! g a u e nn $$$?tFQ4 1D W M d 9 lE 3t g$ 3 i fr$ 4 1 $l5N dNIlh$ g }.1' {i .t j m%Rth t e pn titialin a s a - m d. ? P Sk$ $I kiDD I0fd (Ql fd I NI$hIINkSNN u[ [" dld ; sti tsapsuseith f sl-a n a n a nd u u n s e e wwwgpg ez aptget fY hk ! I 3 I 4, titushsti p ii npin d,d 4.f w s an n u a a s e 2.y 4 2, b %hy${ $p$k. 4 4 L Lamuuuma ~~~ t aE p s
- e6 e
w w S e d k M cl N y -}}