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