ML23069A285

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Blended Cement Impact Evaluation on Renewed CoC 1004
ML23069A285
Person / Time
Site: 07201004
Issue date: 01/20/2023
From:
Orano TN Americas
To:
Office of Nuclear Material Safety and Safeguards
Shared Package
ML23020A920 List:
References
EPID L-2022-LLA-0079, E-61864, CAC 001028
Download: ML23069A285 (1)


Text

Enclosure 8 to E-61864 Amendment 18 Revision 2 to NUHOMS CoC No. 1004 Impacts of New Blended Cement Scope Item on CoC 1004 Renewal 1.0 Evaluation Amendment 18 Revision 2 adds a new scope item to use blended Portland cement meeting the requirements of ASTM C595 for construction of the horizontal storage model (HSM) in addition to use of Type II Portland cement meeting the requirements of ASTM C150. The use of blended Portland cement (ASTM C595) in a concrete mix is identified in Updated Final Safety Analysis Report (UFSAR) Section 4.2, Appendix P, Appendix R and Appendix V.

For HSMs constructed from blended Portland cement in accordance with ASTM C595, as endorsed by ACI 349, the generic evaluation of potential aging mechanisms in Section 4.2 of NUREG-2214 [1] remain applicable.

Regarding the specific renewal aspect where the potential for deleterious alkali-silica reaction is a concern, an assessment of the concrete mix design is performed as recommended in ASTM C595, using the guidance per ASTM C1778, Guide for Reducing the Risk of Deleterious Alkali-Aggregate Reaction in Concrete. Therefore, the concrete properties that are necessary to maintain the structural, thermal, and shielding design functions of the HSM will remain unchanged.

A review of relevant time-limited aging analyses (TLAA) in UFSAR Section 12.2 and the HSM Aging Management Program (AMP) contained in UFSAR Table 12.3-3 found no impacts due to the use of blended cement for the construction of HSMs.

2.0 Conclusion The additional scope of Amendment 18 Revision 2 does not impact the renewed CoC 1004 aging management activities (i.e., TLAAs and AMPs). These aging management activities remain adequate for the structure, systems, and components within the scope of renewal.

3.0 References

1. NUREG-2214, Managing Aging Processes in Storage (MAPS) Report, July 2019.

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