ML24366A099
| ML24366A099 | |
| Person / Time | |
|---|---|
| Site: | 07109315 |
| Issue date: | 12/31/2024 |
| From: | Pierre Saverot Storage and Transportation Licensing Branch |
| To: | Gelder L, Shenk J US Dept of Energy (DOE) |
| References | |
| EPID L-2022-LLA-0116 | |
| Download: ML24366A099 (1) | |
Text
From:
Pierre Saverot To:
Gelder, Lawrence (CONTR)
Subject:
Date:
Tuesday, December 31, 2024 9:02:00 AM Julia C. Shenk, Director Office of Packaging and Transportation U.S. Department of Energy EM-4.24/Germantown Building 1000 Independence Ave, S.W.
Washington, DC 20585
SUBJECT:
APPLICATION FOR REVISION OF CERTIFICATE OF COMPLIANCE NO.
9315 FOR THE MODEL NO. ES-3100 PACKAGE - REQUEST FOR ADDITIONAL INFORMATION
Dear Julia Shenk:
By letter dated February 5, 2024 (Agencywide Documents Access and Management System Package Accession No. ML24060A090), as supplemented on April 17, 2024 (ML24164A259), the U.S. Department of Energy (DOE) submitted an application for revision of certificate of compliance No. 9315 to the Model No. ES-3100 package. In particular, DOE proposed the addition of (i) tri-structural isotropic fuel as authorized contents, and (ii) Packcrete thermal insulating and impact limiting material to the design of the package.
By letter dated October 11, 2024, I transmitted the requests for additional information (RAIs) completed up to this point to allow you to start working on your responses and I was to let you know by December 20, 2024, if the staff had RAIs from the materials evaluation, the only outstanding technical review area that was not yet completed at that time. The RAI and the editorial request are below.
To assist us in scheduling our review of your responses, we request that you provide your complete responses to all RAIs before February 28, 2025. The staff is available to meet and discuss your proposed responses.
Please reference Docket No. 71-9315 and Enterprise Project Identifier No. L-2022-LLA-0116 in future correspondence related to this request. If you have any questions, please contact me via email at pierre.saverot@nrc.gov.
Sincerely,
RAI Provide a justification for the use of a 55-cubic-inch void volume in section 3.1.4.2 of the safety analysis report (SAR) or provide an updated version of table 3.7, showing maximum hypothetical accident condition pressures based a void volume of 43 cubic inches.
Table 3.7 in section 3.1.4.2 of the SAR references a minimum void volume of 55 cubic inches for containment vessel assemblies utilizing convenience cans with a diameter greater than 4.25 inches. Throughout the rest of the SAR (e.g., sections 1.2.2.4, 1.2.2.8, 2.1.1.3, and 3.1.4.1), a void volume of 43 cubic inches is used. Please provide an explanation for the use of the non-conservative 55-cubic-inch void volume, or update table 3.7 to reflect pressures based on 43 cubic inches and reconcile any affected analyses.
This information is needed to determine compliance with 10 CFR 71.43(f).
Editorial: It appears that two thermal property values were either incorrectly converted or incorrectly transcribed in Table 3.8 of section 3.2 of the SAR. The upper limit for the thermal conductivity of Packcrete at 1112 °F (600 °C) was reported to be 0.0070 Btu/hr-in-°F, and the lower limit for specific heat of Packcrete at 1103 °F (595 °C) was reported to be 0.0556 Btu/lbm-°F; however, conversion of the values from the reference RP 802282-0002 (Packcrete Material Properties) would yield values of 0.0098 Btu/hr-in-°F and 0.0461 Btu/lbm-°F. Provide justification for these discrepancies or update table 3.8 and confirm that correct values are used in the supporting analyses.