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Final Safety Analysis Report
	ML23306A278
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Site:	05200050
Issue date:	11/02/2023
From:	; NuScale
To:	; Office of Nuclear Reactor Regulation
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NuScale Final Safety Analysis Report Mechanical Systems and Components NuScale US460 SDAA 3.9-79 Draft Revision 2 Table 3.9-16: Active Valve List Valve No.

Description ASME Class Function1 ASME Class 1, 2, and 3 Chemical and Volume Control System CVC-AOV-0336 CVCS Discharge Isolation Valve 3

5 CVC-SV-0404 RPV High Point Degasification Isolation Valve 3

5 CVC-AOV-0089 Demineralized Water Supply to CVC Makeup Upstream Isolation Valve 3

3 CVC-AOV-0090 Demineralized Water Supply to CVC Makeup Downstream Isolation Valve 3

3 Containment System CVC-CKV-0323 Pressurizer Spray Check Valve 3

65 CVC-CKV-0329 CVCS Injection Check Valve 3

65 CVC-HOV-0324 Pressurizer Spray Outboard Containment Isolation Valve 1

1, 2, 3, 4 CVC-HOV-0325 Pressurizer Spray Inboard Containment Isolation Valve 1

1, 2, 3, 4 CVC-HOV-0330 CVCS Injection Outboard Containment Isolation Valve 1

1, 2, 3, 4 CVC-HOV-0331 CVCS Injection Inboard Containment Isolation Valve 1

1, 2, 3, 4 CVC-HOV-0334 CVCS Discharge Inboard Containment Isolation Valve 1

1, 2, 3, 4 CVC-HOV-0335 CVCS Discharge Outboard Containment Isolation Valve 1

1, 2, 3, 4 CVC-HOV-0401 RPV High Point Degasification Inboard Containment Isolation Valve 1

1, 2, 3, 4 CVC-HOV-0402 RPV High Point Degasification Outboard Containment Isolation Valve 1

1, 2, 3, 4 CE-HOV-0001 Containment Evacuation Inboard Containment Isolation Valve 2

2, 3, 4 CE-HOV-0002 Containment Evacuation Outboard Containment Isolation Valve 2

2, 3, 4 CFD-HOV-0021 Containment Flooding & Drain Outboard Containment Isolation Valve 2

2, 3, 4 CFD-HOV-0022 Containment Flooding & Drain Inboard Containment Isolation Valve 2

2, 3, 4 RCCW-HOV-0184 Reactor Component Cooling Water Inlet Outboard Containment Isolation Valve 2

2, 3, 4 RCCW-HOV-0185 Reactor Component Cooling Water Inlet Inboard Containment Isolation Valve 2

2, 3, 4 RCCW-HOV-0190 Reactor Component Cooling Water Outlet Inboard Containment Isolation Valve 2

2, 3, 4 RCCW-HOV-0191 Reactor Component Cooling Water Outlet Outboard Containment Isolation Valve 2

2, 3, 4 FW-HOV-0137 Feedwater Isolation Valve 2

2, 3, 4 FW-HOV-0237 Feedwater Isolation Valve 2

2, 3, 4 FW-CKV-0136 Feedwater Isolation Check Valve 2

3 FW-CKV-0236 Feedwater Isolation Check Valve 2

3 MS-HOV-0101 Main Steam Isolation Valve 2

2, 3, 4 MS-HOV-0201 Main Steam Isolation Valve 2

2, 3, 4 MS-HOV-0103 Main Steam Isolation Bypass Valve 2

2, 3, 4 MS-HOV-0203 Main Steam Isolation Bypass Valve 2

2, 3, 4 Decay Heat Removal System DHR-HOV-0111 Decay Heat Removal System Actuation Valve 2

3, 4 DHR-HOV-0121 Decay Heat Removal System Actuation Valve 2

3, 4 DHR-HOV-0211 Decay Heat Removal System Actuation Valve 2

3, 4 DHR-HOV-0221 Decay Heat Removal System Actuation Valve 2

3, 4

NuScale Final Safety Analysis Report Mechanical Systems and Components NuScale US460 SDAA 3.9-80 Draft Revision 2 Emergency Core Cooling System2 ECC-POV-0001A Reactor Vent Valve A 1

1, 3, 4 ECC-POV-0001B Reactor Vent Valve B 1

1, 3, 4 ECC-POV-0002A Reactor Recirculation Valve A 1

1, 3, 4 ECC-POV-0002B Reactor Recirculation Valve B 1

1, 3, 4 Safety and Relief Valves RCS-PSV-0003A Reactor Safety Valve A 1

1, 3 RCS-PSV-0003B Reactor Safety Valve B 1

1, 3 SGS-RV-0102 Steam Generator System Thermal Relief Valve 2

2 SGS-RV-0202 Steam Generator System Thermal Relief Valve 2

2 Non-Code Class Valves Condensate and Feedwater System FW-AOV-0134 Feedwater Regulating Valve NC 67 FW-AOV-0234 Feedwater Regulating Valve NC 67 FW-CKV-0135 Backup Feedwater Check Valve NC 67 FW-CKV-0235 Backup Feedwater Check Valve NC 67 Main Steam System MS-AOV-0102 Backup Main Steam Isolation Valve NC 67 MS-AOV-0202 Backup Main Steam Isolation Valve NC 67 MS-AOV-0104 Backup Main Steam Isolation Bypass Valve NC 67 MS-AOV-0204 Backup Main Steam Isolation Bypass Valve NC 67 1 - Function 1 - Reactor coolant pressure boundary 2 - Containment isolation 3 - Accident mitigation 4 - Safe shutdown 5 - Nonsafety-related, but provide an augmented quality function (NRC Quality Group C/D boundary) 6 - Nonsafety-related, but provide an augmented quality function (NRC Quality Group C/D boundary, backup containment isolation) 67 - Nonsafety backup to a safety-related function (Section 15.0.0.6.6) 2 - Trip and reset valves are included with each RVV and RRV.

Table 3.9-16: Active Valve List (Continued)

Valve No.

Description ASME Class Function1

NuScale Final Safety Analysis Report Mechanical Systems and Components NuScale US460 SDAA 3.9-94 Draft Revision 2 Notes:

2.

Valves with augmented test requirements have a beyond-design-basis event function and a Regulatory Guide 1.26, footnote 5, class break function (valves of high leaktight integrity).are relied on in the safety analyses, and these components either provide a nonsafety backup to a safety-related function or are nonsafety-related that provide an augmented quality function. The design does not use safety-related electric power to mitigate accidents or for the safe shutdown of the NPM; therefore, all valves listed have an active-to-failed function to transfer to its backup position on loss of motive power. Valves with an active function are tested by observing the operation of the actuator upon loss of valve actuating power.

3.

Cold Shutdown Outage as defined in ASME OM Code, Paragraph ISTA-2000 is Mode 3, safe shutdown, with all reactor coolant temperatures < 200 degrees F.

The term cold shutdown is used throughout Section 3.9.6 for clarity with the OM Code requirements (Section 3.9.6.4.1).

4.

Backup CVCS Check Valves: The backup CVCS check valves are normally closed, nozzle check valves. These valves cannot be full-stroke or part-stroke exercised closed during plant operation because system flow must be reversed to demonstrate valve closure. The nozzle check design is a spring-to-close design. Nonintrusive testing can be used to verify valve closure (safety-function position) at cold shutdown. Normal CVCS operation satisfies the open (nonsafety-function position) exercise for these valves pursuant to ISTC-3550, Valves in Regular Use, at a frequency that satisfies the requirements for augmented testing by periodically measuring line flow and pressure to confirm the valves are fully open.

Table 3.9-18: Valve Augmented Requirements Valve No.

Description Valve /

Actuator1 Function Position Augmented Function(s)2 ASME Class / IST Category IST Type3 Notes Chemical Volume and Control System CVC-AOV-0336 CVCS Discharge Isolation Valve BALL Remote AO Closed Active BDBE Containment Isolation Class 3 Category A Position Verification Test Exercise Full Stroke/QuarterlyCold Shutdown Failsafe Test/QuarterlyCold Shutdown Leak Test Performance Assessment Test N/A5 CVC-SV-0404 NDS Supply to Reactor Module IsolationRPV High Point Degasification Solenoid Valve GLOBE Remote SO Closed Active BDBE Containment Isolation Class 3 Category A Position Verification Test Exercise Full Stroke/QuarterlyCold Shutdown Failsafe Test/QuarterlyCold Shutdown Leak Test N/A5 CVC-CKV-0329 CVCS Injection Check Valve Nozzle Check Closed Active BDBE Containment Isolation Class 3 Category A/C Check Exercise/Cold Shutdown Leak Test 44, 5 CVC-CKV-0323 Pressurizer Spray Check Valves Nozzle Check Closed Active BDBE Containment Isolation Class 3 Category A/C Check Exercise/Cold Shutdown Leak Test 44, 5 1.

AO air operated CVCS chemical volume and control NPM NuScale Power Module RPV reactor pressure vessel

NuScale Final Safety Analysis Report Mechanical Systems and Components NuScale US460 SDAA 3.9-95 Draft Revision 2 5.

Backup Containment Isolation Valves: Third isolation valves that provide a nonsafety backup function as defined by Regulatory Guide 1.26, C.2(c) footnote 6 as having high leaktight integrity. These valves define the NRC Quality Group C/D and Seismic I/III classification break. The power operated valves receive a nonsafety containment isolation signal.

NuScale Final Safety Analysis Report Environmental Qualification of Mechanical and Electrical Equipment NuScale US460 SDAA 3.11-13 Draft Revision 2 I&C Separation Group A Electrical Penetration Assembly (EPA)