April 2005 T. J. Hill / NSNFP Technical Lead Drop Testing Update - MCO and 24-Inch ISFP Test Canisters

Drop Test Efforts Two 24-Inch Idaho Spent Fuel Project (ISFP) test canisters (modified versions of the standardized DOE SNF canister design) dropped 30 feet: –45-degree impact (24MOD-45-1) –70-degree impact for slapdown (24MOD-70-2) Two MCO test canisters dropped using repository drop criteria from WASRD, Rev 4: –23-foot vertical drop (MCO-00-1) –2-foot 60-degree (worst orientation) drop (MCO-60-2)

MCO 23-ft Drop Test

Pressure Testing – Post Drop Two ISFP test canisters (24MOD-45-1 and 24MOD-70-2) –Held greater than 50 psig air steady for 1 hour Two MCO test canisters (MCO-00-1 and MCO-60-2) –Held greater than 50 psig air steady for 1 hour

Helium Leak Testing – Post Drop Two ISFP test canisters (24MOD-45-1 and 24MOD-70-2) –Helium leak tested less than 1x10 -7 std cc/sec (leaktight) Two MCO test canisters (MCO-00-1 and MCO-60-2) –MCO-00-1 not greater than 1x10 -5 std cc/sec (alternate test method due to prior internal helium contamination) –MCO-60-2 less than 1x10 -7 std cc/sec (leaktight)

MCO Internal Helium Contamination

ISFP Test Canister Deformations Good analysis matches to actual deformations and strains –Typically within 4% on deformations –Good matches with measured strains

ISFP Test Canister Deformations - cont. No internal sleeves were used Localized “bumps” in shell due to internals Analysis accurately predicted these deformations within 2%

MCO Test Canister Deformations - cont. Good analysis matches to very small actual deformations and strains

ISFP Test Canister Internals No significant damage to ISFP internals

MCO Test Canister Internals Component Original Dimension Post-Drop Dimension Model Predicted Dimension Center Post Length in. 25-1/8-in. 25-5/16-in. Center Post Diameter in in in. Only MCO-00-1 was cut open and only bottom basket was of interest Basket cuts are from canister cutting efforts

MCO Test Canister Contamination Radioactivity readily measured once top end of test MCO-00-1 cut off (tape applied after cutting open to prevent potential spread of contamination from holes) Disposed as low level waste at INL with less than 0.5 mr/hr reading

Conclusion NSNFP issued two reports –EDF-NSNF-045 for ISFPs –EDF-NSNF-047 for MCOs NSNFP has demonstrated these DOE SNF canisters will not breach during repository defined drop events