ML20236M038
| ML20236M038 | |
| Person / Time | |
|---|---|
| Site: | 07109790 |
| Issue date: | 11/09/1987 |
| From: | Macdonald C NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | Engel W ENERGY, DEPT. OF |
| References | |
| NUDOCS 8711120008 | |
| Download: ML20236M038 (2) | |
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LArm:; Mr. W. P.?Engel-t.
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-iGentlemen:-
d This refers to your' letter dated March 31',J1983 requesting approval _ of.' A1W-3:
H Barrel and Shroud:D_isposal container _
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q In connectionfwith 'our review, we: need the information.. identified in the-4 enclosure to thislietter.
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Please; advise us within 30 days from"theidate of. this'1etter when thisi
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- -information will' be 'provided. ~ Additional Information renuested by this letter.
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'shculd be submitted'in-the form of revised pages.
If you have:any questions!
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?regarding. this' matter we. would be pleasedsto meet with you;and'your staff.
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- S'incerely,
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'Y hCharlesE.MacDonald, Chief l'
Transportation Branch Division of: Safeguards and
' transportation, NMSS i
Enclosure:
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-A1W-3 Barrel and Shroud D1sposal Container Docket No.- 71-9790
'Encltoltrldtd
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Structural
.1.
The-allowable stress criteria in the application should-be basedidirectlyL j
on material.' yield stress;and ultimate stress rather:than upon yieldL j
1 bending modulus and ultimate bending modulus.'(pgs. 2.1.20,;2.1L29, and1 2.1.30).
2.
Provide a free body diagram of theLtop closure plate showing all: forces
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whichactontheclosureplateundertopcornerimpactorientations(see sketch on pg. 2.7.163).
Show:that-the plate is in~ equilibrium. ;Shown explicitly how the maximum stress'in the closure plate weld.was _
calculated. Show:that the weld stress is.within allowable limitsL 3.
Justify that the equations.for dynamic; yield strength, dynamic ultimate strength, and flow stress (pgs. 2.1.23 and 2.1'.24)' are valid and' L
. appropriate for estimating the deformation ^ required toldissipate the.
I kinetic energy of-the drop test and for determining g-loadsJ Provide a:
~
sketch or tabular data which shows the force-deflectiongrelationship for each impact orientation. Justify that the stress-strain' curve'shown.in Figure 2.1.2.4-1 ic valid for strains up to 58%-(pg.-2.7'6).-
4.
Because high strain rates usually result in lower fracture; toughness than-q static loading conditions, it appears that the dynamic' fracture toughness-value, K should be used in equations:2.20-2.22, rather than K Also,no$,thatthecriteriaindraftRegulatoryGuideMS50164-}k..an-acceptable method for demonstrating ~ adequate material toughness.:
Containment Revise Section 4.3 and Table 4.1'to show that the package does not release radioactive material exceeding an A accidentconditions-(10CFR71.'73).2'quantityinone.weekforhypothetical.
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