ML20138L730
| ML20138L730 | |
| Person / Time | |
|---|---|
| Site: | 07105507 |
| Issue date: | 10/24/1985 |
| From: | Lake W NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| NUDOCS 8510310392 | |
| Download: ML20138L730 (2) | |
Text
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1 OCT2 4 W FCTC:WHL 71-5507 DITISU'3
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a, '- hiin n .y HEf10RANDUi1 FOR: The Files FR0ti: Willian H. Lake, FCTC, it'SS .
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SUBJECT:
!!EETING WITH DOE AND CONTRACTORS TO DISCUSS OUTSTANDING ISSUES ON HFIR SPENT FUEL CASK
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The neeting was held at Silver Spring, October 22, 1985, at the request
- of DOE.
Attendees DOE Martin !!arietta NRC Joanne Passaglia W. C. Stoddart Henry W. Lee Willian A. Pryor Kent E. ficCornack William H. Lake Purpcse The reeting was held at the request of D0E. DOE's stated intent was to gain better understanding of our questions of October 3,1985, concerning
- l the HFIR cask and to explore possible resolution of those questions.
Sumary of Topics
! Containnent o NRC noted change in containment approach. Originally, the containment vessel provided containment; the present approach relies on the fuel clad for containment. ,
o Reliance on fuel clad for containment requires a demonstration of fuel clad integrity under structural load tests.
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Structural ,
i o DOE acknowledged possible deficiencies in scale factors used in their tests. They plan to refine their work and provide additional supporting docunentation, o DOE agreed to provide conparisonsbetween nath nodels used and available test data to confirm the validity of their models.
- o DOE /NRC discussed the need for detail in evaluating cask vessel structure if fuel clad provides containment. It was agreed that detailed evaluation of vessel stresses are not needed for a clad-as-containment approach and that energy balance criteria would be appropriate to show vessel integrity.
Thernal o NRC pointed out the difficulties associated with the nelt
- codel used in the SAR. That is, assuning conduction rather than convection in the melted (liquid) region nay underpredict progression of lead nelt.
o NRC indicated that thernal protection systens fitted to older casks to prevent lead nelting typically consist of a thin steel sheet separated from the main cask body by spacers (e.g., wire wraps).
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