ML24215A131

LLC, Response to SDAA Audit Question Number A-5.PTLR-8

ML24215A131
Person / Time
Site:	05200050
Issue date:	08/02/2024
From:	NuScale
To:	Office of Nuclear Reactor Regulation
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Download: ML24215A131 (1)

Text

Response to NuScale Technical Report Audit Question Question Number: A-5.PTLR-8 Receipt Date: 10/20/2023 Question:

Table 4.1 of the P-T Limits methodology appears to have several confusing entries. All of the Vessel Pressure entries are noted to be in percent of pre-service system hydrostatic test pressure, but the values are all identical and are lacking comparators (e.g., >, etc.)

Please clarify whether Table 4.1 is accurate and if not, supplement the SDAA where appropriate.

Response

There is a column missing from Table 4-1 of TR-130877-P under Vessel Pressure, and there were errors in the pressure values. Condition Report (CR) 153636 in the NuScale Corrective Action Program documents the error. The attached markup to TR-130877-P shows the additional column of information and corrects the errors in the pressure values.

Markups of the affected changes, as described in the response, are provided below:

NuScale Nonproprietary NuScale Nonproprietary

Pressure and Temperature Limits Methodology TR-130877-NP Draft Revision 1

© Copyright 2023 by NuScale Power, LLC 31 Audit Question A-5.PTLR-8 Table 4-1 Pressure-Temperature Limits for NuScale Power Module Reactor Pressure Vessel per 10 CFR 50, Appendix G Operating Condition Vessel Pressure(1)

Requirements for Pressure-Temperature Limits Minimum Temperature Requirements Hydrostatic Pressure and Leak Tests (core is not critical)

Fuel in the Vessel 20 percent 535.3 psig ASME BPVC § XI App. G Limits 0 degrees F Fuel in the Vessel

>20 percent 535.35 psig ASME BPVC § XI App. G Limits 90 degrees F No Fuel in the Vessel (preservice hydrostatic test)

ALL 535.35 psig Not Applicable 60 degrees F Normal Operation (including heatup and cooldown), Including Anticipated Operational Occurrences Core Not Critical 20 percent 535.35 psig ASME BPVC § XI App. G Limits 0 degrees F Core Not Critical

> 20 percent 535.35 psig ASME BPVC § XI App. G Limits 120 degrees F Core Critical 20 percent 535.35 psig ASME BPVC § XI App. G Limits + 40degrees F 90 degrees F Core Critical

> 20 percent 535.35 psig ASME BPVC § XI App. G Limits + 40degrees F 160 degrees F Notes:

1. Percent of the preservice system hydrostatic test pressure.