ML22277A787

E-61285, Enclosure 4, 013e1 Appendix 2.5-5, Document No. FS1-0012857 E0, Revision 1, Safety Criticality Analysis, FCC4 Fuel Shipping Casks - Justification of the Enlarged Neutronic Cavity Section (Public)

ML22277A787
Person / Time
Site:	07103097
Issue date:	08/03/2022
From:	Boyle R, Shaw D TN Americas LLC
To:	Division of Fuel Management
Garcia-Santos N
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References
A33010, L-2022-DOT-0008, E-61285
Download: ML22277A787 (5)

Text

IDENTIFICATION REVISION I

FS1-0012857 E0 11 1.0 I

AREVA NP A AREVA Fuel BU TOTAL NUMBER OF PAGES: 5 Safety Criticality Analysis FCC4 Fuel schipping casks Justification of the enlarged neutronic cavity section ADDITIONAL INFORMATION:

PROJECT DISTRIBUTION TO PURPOSE OF DISTRIBUTION HANDLING Public I I For application

>-------+---

For action CATEGORY STR - Study Report For information BPE STATUS ROLES This text shall NAMESno be visible - Adjust frames over to ensure signature DATES ORGANIZATIONSblock will completely cover this text SIGNATURES AUTHOR I I REVIEWER I I APPROVER I I This text shall no be visible - Adjust frames over to ensure signature block will completely cover this text Classification Export AL: 0E001 ECCN: N RELEASE DATA: Les marchandises portant la désignation "AL inégal N" sont soumises la réglementation européenne ou allemande en matire de contrle des exportations au sein ou hors de l'UE. Les marchandises portant la désignation "ECCN inégal N" sont soumises la réglementation américaine. Les marchandises portant les désignations "AL:N" ou "ECCN:N" peuvent, selon la destination ou l'utilisation finales du produit, également tre soumises autorisation.

Export classification AL: 0E001 ECCN: N Goods labeled with AL not equal to N are subject to European or German export authorization when being exported within or out of the EU. Goods labeled with ECCN not equal to N are subject to US reexport authorization. Even without a label, or with label AL: N or ECCN: N, authorization may be required due to the final whereabouts and purpose for which the goods are to be used.

Exportkennzeichnung AL: 0E001 ECCN: N CHANGE CONTROL RECORDS: France: Y Die mit "AL ungleich N" gekennzeichneten Güter unterliegen bei der Ausfuhr aus der EU bzw.

This document, when revised, must be USA: N innergemeinschaftlichen Verbringung der europischen bzw. deutschen Ausfuhrgenehmigungspflicht. Die mit "ECCN ungleich N" gekennzeichneten Güter unterliegen der US-Reexportgenehmigungspflicht. Auch ohne reviewed or approved by following regions: Germany: N Kennzeichen, bzw. bei Kennzeichen "AL: N" oder "ECCN: N", kann sich eine Genehmigungspflicht, unter anderem durch den Endverbleib und Verwendungszweck der Güter, ergeben.

Non-proprietary document CW01 Rev. 4.5 - 08/03/17

A N° FS1-0012857 E0 Rev. 1.0 STR - Study Report Handling: Restricted AREVA Page 2/5 AREVA REVISIONS REVISION DATE NOTES 1.0 See 1st page New document Non-proprietary document

A N° FS1-0012857 E0 Rev. 1.0 STR - Study Report Handling: Restricted AREVA Page 3/5 AREVA SOMMAIRE

1. INTRODUCTION .............................................................................................................................. 4

2. CODES AND VERSIONS ................................................................................................................. 4

3. COMPUTATION AND MODELLING HYPOTHESES ...................................................................... 4

4. RESULTS ......................................................................................................................................... 5

5. CONCLUSION .................................................................................................................................. 5 REFERENCES

[1] FFDC00817EN Rev.B Safety Criticality study of FCC3 and FCC4 containers -15x15 and 17x17 Assemblies, 17x17XL, 17x17EPRTM, 16x16 and 18x18 Assemblies

[2] Technical note SEC/T/2006-425 indice A Synthse et analyse des résultats de validation de linstallation chez AREVA NP des codes du formulaire CRISTAL V1.1 la charge du SEC

[3] FFDC00561 E2 Rev.4.0 :

Safety-Criticality Study - Fresh UO2 fuel transportation casks -Determining the uncertainties to apply to the criticality studies performed using CRISTAL Non-proprietary document

A N° FS1-0012857 E0 Rev. 1.0 STR - Study Report Handling: Restricted AREVA Page 4/5 AREVA

1. INTRODUCTION The safety criticality justification for the FCC3 and FCC4 containers is the subject of the note [1].

The goal of the present study is to justify the expansion of the neutronic cavity section from I I x I I (mm x mm) to I I x I I (mm x mm) in the FCC4v1 containers loaded with 17x17XL or 17x17EPR' assemblies.

2. CODES AND VERSIONS Calculations are performed with the CRISTAL V1.1 package made up of:

CIGALES version 3.1 (computer version)

APOLLO2 version 2.5.5 MORET4 version 4.B.3 The version of the APOLLO2 built into this package uses sets of microscopic cross-sections based on the JEFF2.2 European evaluation.

The verification of CRISTAL V1.1 installation on our servers and computers is documented in the note

[2].

The use of the CRISTAL package is qualified for the present study by applying an uncertainty of I I I I to the calculated Keff (Keffcal), according to report [3]. In the present report, all the given reactivity values take this uncertainty into account.

3. COMPUTATION AND MODELLING HYPOTHESES The different configurations in this study are:

An array of 10x16x1 (N=80) damaged packages under Accident Conditions of Transport (ACT) with I I (penalizing case cf. §5.3.2 of [1]).

The detailed geometric description is given in [1]. The principal characteristics of the package and the assemblies taken from the report [1] are:

FCC4 v1b container under ACT (cf. §4.1 of [1]), with a neutronic cavity section enlarged to I I x I I (mm x mm) instead of I I x I I (mm x mm),

17x17XL et 17x17EPR' assemblies under ACT, with an enrichment of 5% in 235U (cf. §4.3 of

[1]), with :

Maximal pellet diameter : I I mm (cf. table 2 of [1]),

Minimal cladding outside diameter : I I mm (cf. table 2 of [1]),

Expanded fissile section (1/3 of the assembly length): I Non expanded fissile section (2/3 of the assembly length): I I x I I (mm x mm),

I xI I (mm x mm) instead of I I x I I (mm x mm),

Resin under ACT (cf. §4.2 of [1]).

Non-proprietary document

I I A

N° FS1-0012857 E0 Rev. 1.0 STR - Study Report Handling: Restricted AREVA Page 5/5 AREVA

4. RESULTS All the calculations are realized with a statistical uncertainty of I I The results for the 10x16x1 array of packages (N=80) under ACT are given in the table hereunder:

Proprietary table Nota : Keffmax = Keffcal + I I The results obtained with the I I x I I (mm x mm) section are consistent with those given in the paragraph §5.3.2 of [1] where the statistical uncertainty was I I (I I) (cf. [3]).

5. CONCLUSION This study justifies that the enlargement of the neutronic cavity section from I I x I I (mm x mm) to I I x I I (mm x mm) does not modify the conclusions of the report [1], The safety-criticality criterion (Keffmax 0.95) is still met.

Non-proprietary document