ML20215M269
| ML20215M269 | |
| Person / Time | |
|---|---|
| Site: | 07109010, 07109183, 07109023, 07109103 |
| Issue date: | 05/04/1987 |
| From: | Odegaarden R NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| NUDOCS 8705130151 | |
| Download: ML20215M269 (2) | |
Text
m
//AC#BL
. MAY 0 4 W EFli!!TO MEMORANDUM FOR:
The Files O IAdf3 EDG-53 FROM Richard H. Odegaarden, SGTB, NMSS 9/-7W6
SUBJECT:
NAC, LEGAL WEIGHT TRUCK CASK gg 9/ 03 Attendees NAC NRC i
Larry Danese Dick Odegaarden Alan Wells Charles Williams George Jackson Earl Easton George N. Dixon, Jr Bill Lake Charles R. Johnson Henry Lee Daniel Huang-Charles Marotta
~ Introduction A meeting was held at the request of Nuclear Assurance Corporation (NAC) at Silver Spring, Maryland, on April 29, 1987, concerning the design.of a new legal' weight truck cask.
Discussion NAC showed the NRC staff preliminary drawings of a proposed legal weight truck cask. The cask cavity would hold either one PWR fuel assembly or two BWR fuel assemblies. The cask has a 13-inch ID and has a 42-inch OD by 193-inch length without the impact limiters. With impact limiters, the cask has a 75-inch OD by 221-inch length.
The cask is of.a right circular cylinder design with an inner and outer shell of stainless steel which is filled with lead shielding material. The cask also is provided with a neutron shield (water jacket). The top and bottom ends are stainless steel forgings. The top lid and the bottom contain depleted uranium shielding raterial. The gross weight of the loaded casks, with impact limiters attached is 51,000 pounds.
The contents would be limited to 3~kw decay heat load and 2 year cooled fuel assemblies.
8705130151 870504
{DR ADOCK 0710901o PDR
o The Files 2
MAY 0 41987 The cask is provided with two top penetrations (one fill and one drain line) which are equipped with quick disconnects and sealed with valve covers. The valve covers are provided with a test pcrt between double 0-ring seals. The test port between the double 0-ring seals on the cask lid is similarly sealed. The inside bottom of the cask is crowned to facilitate draining of the cask with a drain tube from the top of the cask.
The cask would be provided with aluminum fuel basket with legs and spacers to center the fuel assemblies within the neutron shield water jacket. The legs and spacers would be analyzed taking into account the one-foot drop for normal conditions of transport, llAC proposed a 1/10 scale test model. The NRC staff expressed concern over the size of the model particularly in the area of the top seal. NAC agreed to model the seal area with a 1/4 scale model in order to obtain better deformation measurements following a puncture test on the top lid. Details of the model testing would be worked out at a later meeting. The cask design is susceptible to puncture damage on the top and bottom because of the hardness of the steel and depleted uranium design (lack of energy absorption ability following the 30-foot drop test).
The NRC staff also raised concerns on how NAC proposed to determine the dryness of the cask. NAC is reluctant to do vacuum drying because of the radioactive contamination of the pump oil.
A time schedule for the submission of an application was not established.
Oficinal Sinn'd DY gg;;5E.MAC M M Richard H. Odegaarden, Project Manager Transportation Branch Division of Safeguards and Transportation, NMSS Distribution:
SGTR Central File NRC PDR Mtg Attendees CRChappell CEMacDonald GBeveridge NMSS R/F SGTB R/F j
nb
/
OFC: SGTB
- SGTB SGTB :
.......... y' Q..U :...............(,44.........................................
NAME:RH0degaarden: alm
- CRChappell CEM Donald DATE:04/30 /07 :
- 04/30/87 :
0/ /87 OFFICIAL l}ECORD COPY l
i i