ML24219A262

Enclosure 3, Safety Related Valve Requirements Redacted

ML24219A262
Person / Time
Site:	Abilene Christian University
Issue date:	07/30/2024
From:	NEXT Laboratory, Abilene Christian Univ
To:	Office of Nuclear Reactor Regulation
Shared Package
ML24219A258	List: ML24213A286 ML24219A259 ML24219A261 ML24219A262
References
Download: ML24219A262 (1)

Text

Enclosure 3 Safety Related Valve Requirements Redacted (non-proprietary)

page 1 of 2 SAFETY RELATED VALVE REQUIREMENTS

Purpose:

Valves within the MSRR perform safety related functions related to the control of reactivity and the containment of radionuclides. The preliminary to-and-from location, quantity, valve type, condition, and design/qualification codes and standards of the safety related valves are provided. Because all of the valves are safety related, they are also classified as seismic class I.

Valves:

From To Quantity System Valve Type*

Temp**

V-7004 V-7002 1 inside V-3004, 1 outside V-3004 ESF Fail Closed V-7002 and 7001 C-6006 2 inside V-3004, 1 outside V-3004 ESF Fail Closed UF4 Handling V-3003 1 inside V-3004, 2 outside V-3004 ESF Fail Closed V-3003 V-3002 4 outside T-3001 RPS Fail Open V-3003 V-3002 2 inside T-3001 RPS Fail Open V-3002 V-1002 1 inside T-1005 ESF Fail Closed V-3002 V-1002 1 inside T-1005 ESF ail Closed V-7307, V-7308, and V-7003 Common Header V-1002 3 outside T-1005 ESF Fail Closed V-7307, V-7308, and V-7003 Common Header V-1002 3 outside T-1005 (upstream of both isolation valves)

ESF Pressure relief valve (PRV)

Common Header V-1002 V-1002 1 inside T-1005 ESF Fail Closed

page 2 of 2 From To Quantity System Valve Type*

Temp**

V-1002 X-1001 1 inside T-1005, 1 outside T-1005 ESF Fail Closed T-1005 X-1001 1

ESF PRV V-1002 T-1005 1

ESF PRV X-6002A/B V-7003 or F-8002 1 inside T-6009, 1 outside T-6009 ESF

, Fail Closed V-1001, V-1004 V-1002 TBD based on DOE shipping ESF TBD based on DOE shipping V-1002 Sample 1 inside T-1005, 1 outside T-1005 ESF Fail Closed

• • Unless mentioned otherwise, the valves are primarily made of SS316. Valves with a service temperature above 425 °C require SS316H. Valves with a service temperature below 425 °C may use SS316L.

Operating and Design Conditions:

The components inside the RTMS shall be designed to operate within the high-temperature environment.

The preliminary design pressure is 70 psig. The final design pressure will be confirmed in the detailed design.

Applicable Codes and Standards: Safety related valves constructed out of SS316 will be manufactured under ASME BPVC Section III, 2017 Edition. Safety related valves constructed out of Ni-201 will be manufactured under ASME B16.34 (2020 Edition unless the 2013 Edition is required by Section III Division 5). Provisions governing the use of Ni-201 are provided in the description of V-1002.

Requirements pertaining to active mechanical equipment within ASME QME-1 (2017) will be satisfied subject to provisions specified in Regulatory Guide 1.100 Revision 4 (2020). ANS 15.8-1995 will define the quality assurance requirements.

Safety related valves will be accessible for maintenance and testing.

Materials of Construction: Stainless steel 316 unless otherwise specified.