Post on 18-May-2020
LSNReviews
From: Oleg Povetko [opovetko@cnwra.swri.edu]Sent: Tuesday, February 12, 2008 11:59 AMTo: natalexSubject: RE:
Normal'no. To, chto nuzhno. Vklyuchi nitric acid production rate per cell and per entire TAD canister cavity otdel'no. Kak ya ponyal, v Tablice V.4tvoego otcheta g/Year - eto production rate of nitric acid v Cell #1, tak? Nam nuzhno takzhe ocenit' production rate vo vsej polosti TAD canister. Yakak-to ocenival davno ob'em etoj polosti:
Cavity volume
(.d - 3)2 (Approximate MPC-68 chicknesses from.FSAR AppendixV :=(h-412) . 5.C)"• 4
V = 1.14 x 107 cmA3
Approximate net free volume inside cavity
237.5Vfree := V.27
367.9 (Ratio from HI-STAR MPC-24 FSAR, Rev.01, DOCKET72-1008, Table 4.4.13)
Vfree = 7.35 x 10 .. +
Mozhesh' prosto umnozhit' na etu Vfree, a esli vremya est', to poschitaj real'nyj ob'em polosti v MCNP modeli.
From: natalex [mailto: natalex@telus.net]Sent: Monday, February 11, 2008 9:05 PMTo: 'Oleg Povetko'Cc: 'Oleg Povetko'; 'SWRI'Subject:
Take a look at these five slides ...
1
I'll send you them if they are right.
Alexei
My MCNP Calculations:
TAD IntafnaI Radius-TSA5 un
PWR-21 Radial Geometry for my MCNP Calculations
2
II.
A MCNP data for Gamma
4 MCNP Data for Neutrons
__Mitric Acid Production Rate in Coll #1 from Gamma Radiation forG-Factor:-I molecul/100 eV
-- INitric Acid Production Rate in Cell #1 from Neutron Radiation for G-Factor=l molecul/100 eV
1 .OOE+02
1 O.E+01 "
1 .OOE+O0lOG.0E-01l
1.OOE-02
j.. l, 1.OOE-03
1.OOE-04
" 1.OE-05
1,OOE-061,00E-07
1.DOE-08
10 100 1000 10000 100000 10000
Years
3
250 Iu -v - --- ~----__ Ir-1
E
Aý-
ý: 100]]
1. 1.e ti
I. Potential , II. Potentidust 'brine perideliquescen ecorrosion /period
alod
0.9
08
07
O'G
0.5
nf /i i
Dry~ii•,, l,•r
0.2
-01Zn Y Zýý Lt:ý I I I7I--- --- W
I-| . . . . . .. . . . . .0i . .......................... .... " .................................................................. I .......................................................... I-i .. . ... . . .
10 100 1000 1000 0 100000
Time, yr
(After Pensado, 2006)
III.
4
- Nitric Acid Accum ulation in Cell #1 from Gamma Radiation br G-Factor-1 minleculfl00 eV
- Nitnc Acid Accum ulation in Cell #1 from Neutrons lor G-Factor=-1 moleculnl 013 e'V
1.OOE +03
1.OOE +02
1.007 +01Q
1.0017 +00 --
M 1.00E-02
1.OOE-03
1.OOE-04
1.00E -05 . . . .. . .. .. . .. . .
10 100 1000 10000 100000 1000000
Years
Nitric Acid Accumulation under assumption that no acid removal mechanisms present
Comparing My Calculation Results with DOE Report
IV.
5
Present MCNP Calculations* DOE Report"1. Assembly Type:
Babcock & Wilcox (B&W) 15 x 15 PWR SNF Assembly2. Enrichment:
5.0-wtO/o initial 235U 4.O-wtO/o Initial 235U3. B~i n _ __ _
78.26 GWd/MTU 48 GWd/MTU4. Doses Calculation Volume Geometry:
TAD Internal Space Excluding AssembliesUnit Cells Outside the Fuel Rods in theCentral Nine SNF Assemblies ofthe 21-PIIIMTD
6
Table of Differences in Calculation Geometry of DOE and Present
V.
7
-*-Present MCNP Calculations* -.*-DOE Report *
1.OOE+18
M>
0 E
~EE
QU~
(.L
z 0 LE
I.OOE+17
I .OOE+16
I.OOE+15
I .OOE+14
I.OOE+13
I.OOE+1210 100 1000 10000 I 00000 1000001
Ypars8
I Nitric Acid Production Rate Graphs
9