ML20154B317
| ML20154B317 | |
| Person / Time | |
|---|---|
| Site: | 07109287 |
| Issue date: | 10/01/1998 |
| From: | David Tiktinsky NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | Chappell C NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| NUDOCS 9810050159 | |
| Download: ML20154B317 (16) | |
Text
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',i October 1, 1998 MEMORANDUM TO:
Cass R. Chappell, Chief Package Certification Section, SFPO FROM:
David Tiktinsky, Project Manager i
Package Certification Section, SFPO
SUBJECT:
MEETING
SUMMARY
CONCERNING THE STERIGENICS INTERNATIONAL TRANSPORTATION CASK l
l Attendees:
NB.C SteriGenics PacTec David Tiktinsky Eric Beers Steve Streuther Andrew Gaunt Mark Smith Joe Nichols Bernie White j
Li Yang Chris Brown Ross Chappell jotroduction A meeting was held at the request of SteriGenics, in Rockville, Maryland, on September 15,1998, concerning a possible request for a Certificate of Compliance for the SteriGenics International Transportation Cask.
Discussion 1.
Storige.iics discussed the design of a tranportation package for
- Co as a sealed 3 o' "9.
2.
Discussion centered around the scale model testing and computer analysis of the impact limiters and the thermal performance of the package.
Docket No: 71-9287
Attachment:
Meeting Handout Distribution:
SeBeill NMSS r/f
$N9CNCinted Attendees h \\ b@D l
SFPO r/f Meeting Notebook NLOsgood "C" = Copy without attachment / enclosure "E' = Copy with attachment / enclosure 'N' = No copy OFC NMSS/SFPO E
NMSS/SFPO O
NMSS/SFPO C DHbnsky ERZiegler CR M NAME b
9d/98
/8/ / /98 DATE 9/
/98 9810050159 981001 D
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Presentation to the NRC l
SteriGenics International Transportation Cask Design and Certification Update I
I September 15,1998 i
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9/15/98
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Meeting Agenda
. Cask Design Changes
. Current Packaging Description i
. Analysis Result Updates
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Completed Static Testing i
Planned Testing l
Discussion i
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t Cask Design Changes Parameter Previous Current 8
Payload Co Sealed Source Weight 20,000 18,500 i
Size 036 x 50 036E x 50 i
i Drain Design Bottom Drain Bottom Drain Shielding Design Enhanced Enhanced
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Thermal Shield Internal Double External impact Limiters 020 x %
O20 x M t
Body Construction SStl Forgings / Pipe SStl Castings w/ (2) weld joints w/ (1) weld joint p,: nc_saw Page 3 I
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9/15/98 A g nessumumsommasu. mesh Conyery Current Packaging Description Summary of Weights and Dimensions Cask Weight ~ 18,500 lbs (configured for transport) impact Limiter Weight ~ 1,700 lbs each a
Payload Weight = 50 lbs a
- Empty Cask Weight ~ 15,050 lbs a
Cask Enveloping Dimensions 036-1/2" x 50" long without impact limiters a
060" x 76"long with impact limiters i
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9/15/98 i
Current Packaging Description Summary of Payload
. Maximum isotopic inventory of Co 6
. Two bounding payloads are considered:
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9/15/98 i
i Analysis Result Updates i
Thermal 8
. Payload consists of Co
. Analytical methods used to demonstrate cask thermal response for l
both NCT and HAC fire event i
. Thermal analyses using finite element computer code (ANSYS*)
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Double thermal barrier surrounding outer wall prevents lead gamma shield melting during the HAC fire event (external thermal shie!d) l t
. Localized hot spot due to puncture damage of thermal shield l
l Personnel barrier maintains accessible packaging components below 185 F for an " exclusive use" shipment I
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. External dose rate levels below limits (cask surface bounds)
. Analysis being updated to reflect current cask design i
. Monte Carlo Analysis used to calculate level of gamma heating in pencils, basket and cask walls; results used in thermal calculations-l i
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Analysis Result Updates Structural (Drop Analysis)
. Wall thickness of impact limiters decreased to reduce impact loads
. Impact force-deflection values have been calculated and compared j
with static crush test results
. Excellent agreement with test results up to ~50% deflection; reasonable agreement with test results for >50% deflection I
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. CG Over Corner
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cm End Test Results End Orientation 300 275
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1.2 1.4 1.6 Deformation On) pa: nac_scissac Page 13
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9/15/98 x -gg ---- n.cm Side Test Results i
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Planned Testing 1/4 Scale Impact Limiter Drop and Puncture Test CG Over Comer l
End Side Puncture Bar Drop Test Drop Orientations Or.ientations t
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