<s>
CRAC-II	B-Application
is	O
both	O
a	O
computer	O
code	O
(	O
titled	O
Calculation	O
of	O
Reactor	O
Accident	O
Consequences	O
)	O
and	O
the	O
1982	O
report	O
of	O
the	O
simulation	O
results	O
performed	O
by	O
Sandia	O
National	O
Laboratories	O
for	O
the	O
Nuclear	O
Regulatory	O
Commission	O
.	O
</s>
<s>
The	O
report	O
is	O
sometimes	O
referred	O
to	O
as	O
the	O
CRAC-II	B-Application
report	O
because	O
it	O
is	O
the	O
computer	O
program	O
used	O
in	O
the	O
calculations	O
,	O
but	O
the	O
report	O
is	O
also	O
known	O
as	O
the	O
1982	O
Sandia	O
Siting	O
Study	O
or	O
as	O
NUREG/CR	O
-2239	O
.	O
</s>
<s>
The	O
computer	O
program	O
MACCS2	O
has	O
since	O
replaced	O
CRAC-II	B-Application
for	O
consequences	O
of	O
radioactive	O
release	O
.	O
</s>
<s>
CRAC-II	B-Application
has	O
been	O
declared	O
to	O
be	O
obsolete	O
and	O
will	O
be	O
replaced	O
by	O
the	O
State-of-the-Art	O
Reactor	O
Consequence	O
Analyses	O
study	O
.	O
</s>
<s>
The	O
CRAC-II	B-Application
simulations	O
calculated	O
the	O
possible	O
consequences	O
of	O
a	O
worst-case	O
accident	O
under	O
worst-case	O
conditions	O
(	O
a	O
so-called	O
"	O
class-9	O
accident	O
"	O
)	O
for	O
a	O
number	O
of	O
different	O
U.S.	O
nuclear	O
power	O
plants	O
.	O
</s>
<s>
In	O
response	O
to	O
comments	O
specifically	O
mentioning	O
the	O
CRAC-II	B-Application
study	O
,	O
the	O
NRC	O
wrote	O
:	O
</s>
