ML052900528

Meeting Summary, Use of Nuhoms Fuel Storage System Under General License at Surry - 10CFR50.68 Implications

ML052900528
Person / Time
Site:	Surry
Issue date:	09/27/2005
From:	Dominion
To:	Office of Nuclear Reactor Regulation
Monarque, S R, NRR/DLPM, 415-1544
Shared Package
ML052900334	List: ML052870200 ML052900528
References
Download: ML052900528 (12)

Text

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Use of NUHOMS Fuel Storage System Under General License at Surry JOCFR50.68Implications Meeting with U.S. Nuclear Regulatory Commission September 27, 2005

© 2005 Dominion

0foomin iow Agenda Opening remarks Surry current ISFSI status and planned changes Compliance with 10CFR50.68 for general license storage system

• Analytical approach

• Schedule

© 2005 Dominion

XIDom'In'IOn Surry CurrentISFSI Status

&W- --,, k., 'i, ,,, -.!I.,P.1,CW"-,.In" Site specific license

• Two pads

• 53 metal storage casks in place

- Five different cask designs

- 1406 fuel assemblies Plan to load last two TN-32 casks by July 2006

© 2005 Dominion

x~Dominlott Surry ISFSI - Pad I C 2005 Dominion

wDominionw Surry ISFSI - Pad2 7 _

© 2005 Dominion

1DominionM PlannedDry Storage Changes Use of a new fuel storage system is planned

• Begin loading NUHOMS-32PTH casks in August 2006

• Unlike previous cask designs used at Surry, NUHOMS casks will be used under general license Surry compliance with 10CFR50.68 must be addressed for loading of NUHOMS casks under general license

© 2005 Dominion

x$Dominionf NUHOMS Storage System

( 2005 Dominion

10M%6.

,4,x7i7-Dominlow** IOCFR50.68 Compliance

,, MW Bernard,Z."

Reviewed compliance with 8 requirements in 10CFR50.68(b)

Additional criticality calculation required for the NUHOMS-32PTH cask:

• NUHOMS HD criticality analyses for Part 72 credit presence of soluble boron in SFP

- 10CFR50.68 requires subcriticality for unborated conditions in SFP

• Surry SFP analysis does not assume soluble boron for normal operation

© 2005 Dominion

XPominion 1 OCFR50.68 Compliance New criticality calculations performed for NUHOMS-32PTH casks for Surry fuel:

• No credit taken for soluble boron

• Fuel assembly burnup credit taken Plan to amend Surry Part 50 TS to ensure compliance with basis of criticality calculation

• Add minimum burnup requirements for fuel to be stored in NUHOMS-32PTH system

• Similar to limit on burnup currently in Surry TS for Region 1 of SFP

© 2005 Dominion

IPAlw&-

7,5 Sample TS Burnup Curve.for Dominiow NUHOMS-32PTH ww",  ?

Casks 50000.0 40000.0 ED 30000.0 F'0 20000.0 10000.0 --.

0.0 -_

2.0 2.5 3.0 3.5 4.0 4.5 5.0 Nominal Initial Fuel Enrichment, w/o U-235

©2005 Dominion

xDominionf LAR Schedule

- _.AN~

Activit Est. Date SER for NUHOMS HD cask system September 2005 (Includes 32PTH canister)

Submittal of Surry LAR supporting November 2005 NUHOMS cask use / compliance with 10 CFR 50.68 SER for Surry LAR June 30, 2006 Loading of last TN-32 cask at Surry July 2006 Final dry run for NUHOMS-32PTH cask July 2006 loading at Surry Implementation of 50.68 at Surry for August 1, 2006 NUHOMS casks Initial loading of NUHOMS-32PTH casks August 2006 at Surry

© 2005 Dominion'

0 Dominiow Discussion V ..#r tiflAt.t 4

• Feedback

• Approach

• Schedule

• Identify any action items

© 2005 Dominion