ML15049A488: Difference between revisions
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CASA
calculation
(Table
1
below).
Further
partitioning
of
total
fiber
into
size
fractions
by
fractional | CASA
calculation
(Table
1
below).
Further
partitioning
of
total
fiber
into
size
fractions
by
fractional | ||
composition
shows
identical
agreement
between
manual
and
automated
evaluation
when
starting
with | composition
shows
identical
agreement
between
manual
and
automated
evaluation
when
starting
with | ||
the
same
total
volume. | the
same
total
volume. | ||
Table
1:
Volumetric
insulation
debris
quantities
from
LBLOCA
at
weld
31-RC-1402-NSS-RSG-1D-ON-SE | Table
1:
Volumetric
insulation
debris
quantities
from
LBLOCA
at
weld
31-RC-1402-NSS-RSG-1D-ON-SE | ||
Insulation Type ZOI Size CAD Debris Volume (ft3) CASA Debris Volume (ft3) | Insulation Type ZOI Size CAD Debris Volume (ft3) CASA Debris Volume (ft3) | ||
Microtherm1 28.6D 0.013 1.7 7.0D 317.2 326.3 Nukon 11.9D 553.6 578.4 17.0D 810.2 829.7 7.0D 295.0 283.4 Thermal Wrap 11.9D 623.3 606.6 17.0D 1,134.8 1,138.7 1 | Microtherm1 28.6D 0.013 1.7 7.0D 317.2 326.3 Nukon 11.9D 553.6 578.4 17.0D 810.2 829.7 7.0D 295.0 283.4 Thermal Wrap 11.9D 623.3 606.6 17.0D 1,134.8 1,138.7 1 | ||
Most
microtherm
exists
within
pipe
penetrations
of
the
secondary
shield
wall
that
are
difficult
to | Most
microtherm
exists
within
pipe
penetrations
of
the
secondary
shield
wall
that
are
difficult
to | ||
isolate
manually. | isolate
manually. | ||
Recommended
Procedure: | Recommended
Procedure: | ||
The
mass
of
fine
fiber
introduced
to
the
containment
pool
from
each
break
scenario
is
not
a
standard
output
of | The
mass
of
fine
fiber
introduced
to
the
containment
pool
from
each
break
scenario
is
not
a
standard
output
of | ||
Line 47: | Line 45: | ||
follow
the
steps
below
to
extract
fine-fiber
quantity
from
CASA
in
units
of
pounds
mass.
Highlighted | follow
the
steps
below
to
extract
fine-fiber
quantity
from
CASA
in
units
of
pounds
mass.
Highlighted | ||
lines
show
suggested
code
to
implement
the
instructions: | lines
show
suggested
code
to
implement
the
instructions: | ||
1 | 1 | ||
: 1. Open
CASA02.m
and
navigate
to
Line
3007 | |||
: 1. Open
CASA02.m
and
navigate
to
Line
3007 | |||
: 2. Add
a
statement
for
storing
the
following
three
variables
in
a
new
variable:
LDFGSize,
MicroTh,
and | : 2. Add
a
statement
for
storing
the
following
three
variables
in
a
new
variable:
LDFGSize,
MicroTh,
and | ||
LatentFiberSmp | LatentFiberSmp | ||
: a. LDFGsize:
Nbrk
x
3
| : a. LDFGsize:
Nbrk
x
3
| ||
: i. Column
1
=
LDFG
Fines
Generated
-
Must
be
Converted
to
lbm
using
density
(2.4 | : i. Column
1
=
LDFG
Fines
Generated
-
Must
be
Converted
to
lbm
using
density
(2.4 | ||
Line 61: | Line 55: | ||
lbm/ft3) | lbm/ft3) | ||
iii. Column
3
=
LDFG
Large
Generated
-
Must
be
Converted
to
lbm
using
density
(2.4 | iii. Column
3
=
LDFG
Large
Generated
-
Must
be
Converted
to
lbm
using
density
(2.4 | ||
lbm/ft3) | lbm/ft3) | ||
: b. MicroTh:
Nbrk
x
1 | : b. MicroTh:
Nbrk
x
1 | ||
: i. Column
1
=
Microtherm
Generated
-
Must
be
Multiplied
by
fiber
constituent
fraction | : i. Column
1
=
Microtherm
Generated
-
Must
be
Multiplied
by
fiber
constituent
fraction | ||
(0.03) | (0.03) | ||
ii. Column
1
=
Microtherm
Generated
-
Must
be
Converted
to
lbm
using
density
(15 | ii. Column
1
=
Microtherm
Generated
-
Must
be
Converted
to
lbm
using
density
(15 | ||
lbm/ft3) | lbm/ft3) | ||
: c. LatentFiberSmp:
Nbrk
x
1 | : c. LatentFiberSmp:
Nbrk
x
1 | ||
: i. Column
1
=
Latent
Fiber
Generated
-
Must
be
Converted
to
lbm
using
density
(2.4 | : i. Column
1
=
Latent
Fiber
Generated
-
Must
be
Converted
to
lbm
using
density
(2.4 | ||
lbm/ft3) | lbm/ft3) | ||
RoverDGen = [LDFGSize | RoverDGen = [LDFGSize | ||
* 2.4, Microth | * 2.4, Microth | ||
Line 78: | Line 69: | ||
* 15, LatentFiberSmp | * 15, LatentFiberSmp | ||
* 2.4]; | * 2.4]; | ||
: 3. Use
the
following
Equation
to
Compute
the
Mass
of
RoverD
Debris
Transported: | |||
: 3. Use
the
following
Equation
to
Compute
the
Mass
of
RoverD
Debris
Transported: | |||
Total
Fiber
Fines
Transported
=
(0.018
+
0.967) | Total
Fiber
Fines
Transported
=
(0.018
+
0.967) | ||
* LDFG
Fines
Generated
+
[LDFG
Fines] | * LDFG
Fines
Generated
+
[LDFG
Fines] | ||
Line 90: | Line 79: | ||
* MicroTherm
Fiber
Generated
+
[MicroTherm
Fines] | * MicroTherm
Fiber
Generated
+
[MicroTherm
Fines] | ||
(0.060
+
0.890) | (0.060
+
0.890) | ||
* Latent
Fiber
Generated
[Latent
Fiber
Fines] | * Latent
Fiber
Generated
[Latent
Fiber
Fines] | ||
Fracts = [0.985, 0.018, 0.010, 0.985, 0.950]; | Fracts = [0.985, 0.018, 0.010, 0.985, 0.950]; | ||
Fracts = repmat(Fracts, Nbrk, 1); | Fracts = repmat(Fracts, Nbrk, 1); | ||
RoverDTrans = RoverDGen.*Fracts; | RoverDTrans = RoverDGen.*Fracts; | ||
: 4. Extract
desired
breaks
by
matching
weld
attributes | : 4. Extract
desired
breaks
by
matching
weld
attributes | ||
2}} | 2}} |
Latest revision as of 15:16, 5 February 2020
ML15049A488 | |
Person / Time | |
---|---|
Site: | South Texas |
Issue date: | 02/18/2015 |
From: | Lisa Regner Plant Licensing Branch IV |
To: | Koehl D South Texas |
Regner L | |
References | |
Download: ML15049A488 (2) | |
Text
Question for Discussion:
A question was raised by Southwest Research Institute (SwRI) regarding fiber mass units, which were
labeled as pounds mass (lbm), at the STP meeting of 02/04/15. The table in question (RoverD table)
cited weld locations capable of introducing more fine fiber mass to the containment pool than was
tested during a July 2008 STP flume test.
STP's understanding is that SwRI stated they obtained similar numeric values but only when units of
kilograms are applied.
Confirmatory Comparison:
It is not clear what steps SwRI followed to generate or extract comparative information from CASA
Grande v1.6. The numeric results STP presented require non-standard output methods that must be
obtained from the vendor (Alion). Also, independent verification of results obtained should be done to
ensure correct values are being obtained. In the following, process steps and verification are
summarized.
Extensive QA comparisons have been performed between manually directed CAD calculations of total
debris volume and automated CASA Grande calculations of total debris volume within a ZOI. A
comparison of a spherical DEGB ZOI at weld point 31-RC-1402-NSS-RSG-1D-ON-SE located on the Loop
D Crossover Leg (31-in.) shows good agreement between manual CAD extraction and the automated
CASA calculation (Table 1 below). Further partitioning of total fiber into size fractions by fractional
composition shows identical agreement between manual and automated evaluation when starting with
the same total volume.
Table 1: Volumetric insulation debris quantities from LBLOCA at weld 31-RC-1402-NSS-RSG-1D-ON-SE
Insulation Type ZOI Size CAD Debris Volume (ft3) CASA Debris Volume (ft3)
Microtherm1 28.6D 0.013 1.7 7.0D 317.2 326.3 Nukon 11.9D 553.6 578.4 17.0D 810.2 829.7 7.0D 295.0 283.4 Thermal Wrap 11.9D 623.3 606.6 17.0D 1,134.8 1,138.7 1
Most microtherm exists within pipe penetrations of the secondary shield wall that are difficult to
isolate manually.
Recommended Procedure:
The mass of fine fiber introduced to the containment pool from each break scenario is not a standard output of
CASA Grande v1.6, which was provided for review to SwRI. Alion recommends that a knowledgeable user
follow the steps below to extract fine-fiber quantity from CASA in units of pounds mass. Highlighted
lines show suggested code to implement the instructions:
1
- 1. Open CASA02.m and navigate to Line 3007
- 2. Add a statement for storing the following three variables in a new variable: LDFGSize, MicroTh, and
LatentFiberSmp
- a. LDFGsize: Nbrk x 3
- i. Column 1 = LDFG Fines Generated - Must be Converted to lbm using density (2.4
lbm/ft3)
ii. Column 2 = LDFG Small Generated - Must be Converted to lbm using density (2.4
lbm/ft3)
iii. Column 3 = LDFG Large Generated - Must be Converted to lbm using density (2.4
lbm/ft3)
- b. MicroTh: Nbrk x 1
- i. Column 1 = Microtherm Generated - Must be Multiplied by fiber constituent fraction
(0.03)
ii. Column 1 = Microtherm Generated - Must be Converted to lbm using density (15
lbm/ft3)
- c. LatentFiberSmp: Nbrk x 1
- i. Column 1 = Latent Fiber Generated - Must be Converted to lbm using density (2.4
lbm/ft3)
RoverDGen = [LDFGSize
- 2.4, Microth
- 0.03
- 15, LatentFiberSmp
- 2.4];
- 3. Use the following Equation to Compute the Mass of RoverD Debris Transported:
Total Fiber Fines Transported = (0.018 + 0.967)
- LDFG Fines Generated + [LDFG Fines]
(0.018)
- LDFG Smalls Generated + [Eroded Small Fines]
(0.010)
- LDFG Larges Generated+ [Eroded Large Fines]
(0.018 + 0.967)
- MicroTherm Fiber Generated + [MicroTherm Fines]
(0.060 + 0.890)
- Latent Fiber Generated [Latent Fiber Fines]
Fracts = [0.985, 0.018, 0.010, 0.985, 0.950];
Fracts = repmat(Fracts, Nbrk, 1);
RoverDTrans = RoverDGen.*Fracts;
- 4. Extract desired breaks by matching weld attributes
2