ML19220C516
| ML19220C516 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 04/20/1979 |
| From: | Miraglia F Office of Nuclear Reactor Regulation |
| To: | Stello V Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7905110126 | |
| Download: ML19220C516 (3) | |
Text
,
/,M r
/pm 8800 e,
UNITED STATES
,,I-*1 NUC1. EAR REGULATORY COMMISSION E 1, W ASHINGTON, D. C. 20555 J
gk, N, o[
- .,4*
April 20, 1979 NOTE TO:
V. Stello, Jr., Director, TMI Operations FROM:
F. J. Miraglia, Jr., Cocrdinator, Team B The attached inferration was requested by L. Barrett and was prepared by R. E=ch and F. Akstulewicz.
A 1 -
F.
ia Coordinater, Team B Attach =ent:
As Stated cc: see attached distributicn list 7 90511 o [g6 96 090
/
/
n We were requested by L. Barrett to calculate the dose rates from RHR piping.
R. Emch and F. Akstulewicz have performed such calculations by hand.
At-tached is a graph showing the dose rate at one meter and at ten meters from a twelve inch RHR pipe containing primary coolant for various decay times. Also, we calculated a dose rate of 3.8 R/hr at one meter from a ten inch RHR pipe containing primary coolant decayed for 90 days (from the date of the second primary coolant sample analysis).
The source term was based on the concentrations obtained in the analyses, dated 4/ll/79, of the second TMI-2 primary coolant sample:
I-1 31 8000 pCi/cc CS-134 76 vCi/cc Cs-136 100 uCi/cc Cs-137 320 vCi/cc Ba-140 260 v'Ci/cc La-140 260 uCi/cc - based on equilibrium with Ba-140 Upon investigation we found that the sizes of the RHR pipes at TMI-2 are nominal 10',' and 12".
As you can see from the graph, the dose rate is dominated by I-131 early and by Cs-134 and Cs-137 after about 60 days.
=
m e
g
-~~
F T-- -
b- _ - r- : - _ * -- --.- m- ~ :
_9
- T[
'6~
?-- --_- -
_r 2 2 --' - ~_ f-7== - ~ ~ ~ ' ~ ~ - - - ~ -
,::: 9 [ 3 = _ ; g = = = 4 m y g g 3 9 4 g g g, g y' =.
7-- r
= = = -
_ _=
= Q+
4--_ _ _ _ --
~~ k ______. _ _ _
- L _=v - -
F_
_3 C+
e
. _ _.. --- I.A - f " _= _2 ----
e
= - -.
~' ; __;[ _c gr i _---u __ _ g rg -- _2_ _- _-~ --- jj- -_1_ r -pgjr--j_ _=p ' 6_- g -- i ---- _ -- - - - _-- _ E j
-_1 1.
r__-i_;_____---~~
r
- - n__. -
z--
tii ---___ - __2=
_ -________:=..-.==___.__=- 5 @M "__- _M=---+=. : - -- ~~ - :=_ UN _ - _ ^ -
! - --~ _ \\ i f
-.__:^^-^
- ~ ^ - - - - -
i _
_ _ _ _ _ _. _ " _ " ' ~..i
- ~
1
__4 1
I
\\
P i C f E S.T k h 2 Oat f
\\
1
\\$a >
UF-T M - D_ dpiG Q
~4 i
i 1
' c,olut;;gm' t6 /e,
'\\
"S; _I1 " P
,x i
i t
i i
i o e x
o.. b Q11Myse s datcM_f11 1
\\
\\
s c
- _ m -- -
- =- y w
- -- _-4 =-- -- y __ = _.;= = + - =- - _= __ = L==== = =
3 _, !=- \\ -- ="
- 1. l_ _ _ Y "_. __ __ __ _~_~ ' - ~ ~
1.___.1 ' _ _ Z i __ N-'__---T- ' ~ L._ l ------ _. -= 1 _ _ _
._1
=9 = - '
=
J__'---
T_
4 5
1 g,_
'?
5~
^
- M:____-.--7="=M=&--::= tcy 3-3
=~ Y-W --iY:: 2f ~~~-i --L-
- - ~ ~ ^ - '
r
- __s _afM=ge_
- -\\--
a__
.-.---=q q
a_.
x l
-mem,~
'1 i
\\
2.
N 1
\\
g X
\\
S.
\\
x i
i
\\
i i
i 4
i
~
"r I
i X.
i i
-?
i
\\ U i
i i
{'
l 6
{"
9 F--
r 1 : : -
--d- ---~7 -- +T=2TA-- ------ ' -- ---- --7=#=Ez
EL=- = =I = r- =-r =-- -i -m=--?==
_ _ _ _ M-Z~~_ __ ~ ~ - ' ' -- - -N ' 01" "._ 1 j; - i =.
M---==='_=i==-=--__-
y.
=-
n
,, y i
7,
+,o m1ersm
=
n s.
n
~~
W 3___._
___._____ _ g ___ _ _ _ _ _ _ _.. _ _ _ _ _ _
O 7_~~-~~_'l _ :- l Z' -] --~~~ ~
____~l- ! -~~ ~ ~ ' ' - ^ - 'j Z -
T_ _' - ' ^ } ~ 1_
~ ' Z~Q~ y~._l))--y ___ _Q_ __4 g_=== =_ - ___ ____ - ___ _ _ = - - ___ __ _ _ - -
_ _ - _ __ -.____ -. -_. - - _ _ _ _ _ _ - ~. _. _ - -. - _ - _ __
-4 2.
i i
w N
l h i
'l s_
]
i
~
/v
_ j i
i e
i i
i 4
_i i
e i
i i
JOY
~
9'o 12.o riro o
So 6o'7 / M E /N DAYS f# o/>) 4 /n /79