ML23304A489
| ML23304A489 | |
| Person / Time | |
|---|---|
| Site: | 05200050 |
| Issue date: | 10/31/2023 |
| From: | NuScale |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML23306A049 | List:
|
| References | |
| LO-152560 | |
| Download: ML23304A489 (1) | |
Text
NuScale Nonproprietary Response to SDAA Audit Question Question Number:A-15.5.1-1 Receipt Date:04/17/2023 Question:
Initial conditions are missing for the 3 limiting cases in Table 15.5-2: Drift on RSV setpoint, delay on CVCS isolation valve closure time, and maximum regulating control rod speed. Please provide markups to this table for inclusion in the SDAA.
Response
The drift of the reactor safety valve (RSV) setpoint, delay on chemical volume and control system (CVCS) isolation valve closure time, and maximum regulating control rod speed are added to FSAR Section 15.5 Table 15.5-2, Initial Conditions - Chemical and Volume Control System Malfunction.
Markups of the affected changes, as described in the response, are provided below:
NuScale Nonproprietary
NuScale Final Safety Analysis Report Increase in Reactor Coolant Inventory NuScale US460 SDAA 15.5-7 Draft Revision 1 Audit Item A-15.5.1-1 Table 15.5-2: Initial Conditions - Chemical and Volume Control System Malfunction Case PZR Level [%]1 RCS Temperature
[°F]1 Makeup Temperature
[°F]1 Makeup Flow
[gpm]
Pressurizer Spray Containment Isolation Valve Closure Time
[s]
The Drift on RSV Setpoint
[psia]1 Maximum Regulating Control Rod Speed [in/min]
Limiting RCS pressure 52 (-8) 535 (-5) 150 (+90) 40 Off 10 2266 (+3%)
6 Limiting SG pressure 52 (-8) 545 (+5) 40 (-20) 25 Off 10 2266 (+3%)
6 Limiting MCHFR 52 (-8) 545 (+5) 40 (-20) 40 On 10 2266 (+3%)
6 1 Biases are in parentheses.