ML19178A124

Enclosure 1: Rsi (non-proprietary) (Letter to P. Narayanan Acceptance Review of Tn Americas LLC Application for Certificate of Compliance No. 1042, Amendment No. 2 Nuhoms Eos System (Dkt: 72-1042, CAC: 001028, EPID: L-2019-LLA-0078))

ML19178A124
Person / Time
Site:	07200042
Issue date:	06/28/2019
From:	Christian Jacobs Spent Fuel Licensing Branch
To:	Narayanan P TN Americas LLC
Jacobs C
Shared Package
ML19178A122	List: ML19178A123 ML19178A124
References
CAC 001208, EPID L-2019-LLA-0078
Download: ML19178A124 (2)

Text

Request for Supplemental Information (non-proprietary)

By letter dated April 18, 2019, TN Americas LLC submitted to the U.S. Nuclear Regulatory Commission (NRC) an application for Certificate of Compliance No. 1042, Amendment No. 2 to the NUHOMS EOS System, pursuant to the requirements of Part 72 of Title 10 of the Code of Federal Regulations (10 CFR 72).

This request for supplemental information (RSI) identifies additional information needed by the NRC staff in connection with its review of this amendment application. Each RSI below describes information needed by the staff to complete its acceptance review determination of the subject application. In addition, the staff has noted several observations, which may result in a request for additional information should the application be accepted for docketing.

Materials RSI RSI-1. Provide supplemental information on the HSM-MX Transfer Cask Adapter described in Updated Final Safety Analysis Report (UFSAR) section B.1.2.2 including: (1) drawing of the components with dimensions and tolerances, (2) a parts list with material specifications and quality category information, and (3) material and design limits information relevant to UFSAR Section B.4.2.

The staff needs this information to proceed with its review to determine if the amendment application meets the regulatory requirements of 10 CFR 72.236(b).

Materials Observation OBS-M1. The definition of damaged fuel in EOS Amendment 2 UFSAR Technical Specifications Section 1.1 is not equivalent to the definition in 72-1004 Amendment 15 Technical Specifications Table 1-1t for the 61BTH (ML18347B336). The definition in 72-1004 Amendment 15 Technical Specifications Table 1-1t includes the additional characteristic as follows:

The extent of damage in the fuel rods is to be limited such that a fuel pellet is not able to pass through the damaged cladding during handling and retrievability is ensured following normal and off-normal conditions.

The staff note that the change in the definition of damaged fuel from that provided in the approved 72-1004 Amendment 15 Technical Specifications Table 1-1t will need additional analyses to show the revised contents can be safely loaded, stored and unloaded (if necessary) without the use of a failed fuel can.

The staff needs this information to proceed with its review to determine if the amendment application meets the regulatory requirements of 10 CFR 72.236(a), (g), and (h).

Enclosure

Confinement Observations OBS-C1. Ensure that the description of the siphon/vent port block welds for the EOS-37PTH/89BTH DSCs and the 61BTH Type 2 DSC (Enclosure 4 to E-53778: Proposed Technical Specifications, CoC 1042 Amendment 2, Rev. 0) is appropriate.

In Enclosure 4 to E-53778, the description of the welds (first paragraph for NB-4243 and NB-5230, page 4-6) for the EOS-37PTH and the EOS-89BTH DSCs should be identical to the description for the 61BTH Type 2 DSC (page 4-8); however, its noted that the description for the 61BTH Type 2 DSC also describes the siphon and the vent port block welds, whereas the description for the EOS-37PTH and the EOS-89BTH DSCs does not.

The applicant should review the design drawings and ensure that the description of the siphon/vent port block welds is appropriate for both the EOS-37PTH/89-BTH DSCs and the 61BTH Type 2 DSC.

This information is needed to determine compliance with 72.236 (j) and (l).

OBS-C2. All references to ISG-15 should be revised to refer to NUREG-1536 Revision 1 in NUHOMS EOS Amendment 2, since ISG-15 was incorporated into NUREG-1536 Revision 1.

In Enclosure 4 to E-53778, the description of the cover to shell welds (second paragraph for NB-4243 and NB-5230 for the EOS-37PTH and EOS-89BTH DSCs (page 4-6) and second paragraph for 61BTH Type 2 DSC (page 4-8)), refer to NUREG-1536 Revision 1, instead of ISG-15, as guidance for welds (see revisions below):

The cover to shell welds are designed to meet guidance provided in NUREG-1536 Revision 1 ISG-15 for stress reduction factor (page 4-6).

The shell to the outer top cover weld will be a multi-level weld and receive multi-level PT examination in accordance with the guidance provided in NUREG-1536 Revision 1 ISG-15 for NDE (page 4-8).

This is because ISG-15 was incorporated into NUREG-1536 Revision 1.

This information is needed to determine compliance with 72.236(j) and (l).