ML18270A405
| ML18270A405 | |
| Person / Time | |
|---|---|
| Site: | NuScale |
| Issue date: | 09/27/2018 |
| From: | Rad Z NuScale |
| To: | Document Control Desk, Office of New Reactors |
| References | |
| LO-0918-61972 | |
| Download: ML18270A405 (5) | |
Text
LO-0918-61972 September 27, 2018 Docket No.52-048 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk One White Flint North 11555 Rockville Pike Rockville, MD 20852-2738
SUBJECT:
NuScale Power, LLC Submittal of Changes to Final Safety Analysis Report, Section 5.2.3, Reactor Coolant Pressure Boundary Materials
REFERENCES:
Letter from NuScale Power, LLC to Nuclear Regulatory Commission, "NuScale Power, LLC Submittal of the NuScale Standard Plant Design Certification Application, Revision 1," dated March 15, 2018 (ML18086A090)
In response to an NRC request dated, August 20, 2018 and during a September 26, 2018 telephone call with Bruce Bavol of the NRC staff, NuScale Power, LLC (NuScale) discussed potential updates to Final Safety Analysis Report (FSAR), to address Reactor Pressure Vessel welding material in Table 5.2-4, "Reactor Coolant Pressure Boundary Component and Support Materials Including Reactor Vessel, Attachments, and Appurtenances." As a result of this discussion, NuScale changed Table 5.2-
- 4. The Enclosure to this letter provides a mark-up of the FSAR pages, in red line/strikeout format.
Nu Scale will include this change as part of a future revision to the Nu Scale Design Certification Application.
This letter makes no regulatory commitments or revisions to any existing regulatory commitments.
If you have any questions, please feel free to contact Carrie Fosaaen at 541-452-7126 or at cfosaaen@nuscalepower.com.
Sincerely,
~~*
Zackary W. Rad Director, Regulatory Affairs NuScale Power, LLC Distribution: Samuel Lee, NRC, OWFN-8G9A Gregory Cranston, NRC, OWFN-8G9A Bruce Bavol, NRC, OWFN-8G9A
Enclosure:
"Changes to NuScale Final Safety Analysis Report Section 5.2.3, Reactor Coolant Pressure Boundary Materials" NuScale Power, LLC 1100 NE Circle Blvd, Suite 200 Corvallis, Oregon 97330 Office 541.360-0500 Fax 541.207.3928 www.nuscalepower.com
LO-0918-61972 NuScale Power, LLC 1100 NE Circle Blvd., Suite 200 Corvallis, Oregon 97330 Office 541.360-0500 Fax 541.207.3928 www.nuscalepower.com
Enclosure:
Changes to NuScale Final Safety Analysis Report Sections 5.2.3, Reactor Coolant Pressure Boundary Materials
NuScale Final Safety Analysis Report Integrity of Reactor Coolant Boundary Tier 2 5.2-33 Draft Revision 2 RAI 05.02.03-1, RAI 05.02.03-9, RAI 05.02.03-12, RAI 05.02.03-18, RAI 05.03.01-3, RAI 05.04.02.01-6, RAI 06.01.01-1S1, RAI 06.01.01-3, RAI 08.01-2 Table 5.2-4: Reactor Coolant Pressure Boundary Component and Support Materials Including Reactor Vessel, Attachments, and Appurtenances Component Specification Alloy Designation (Grade, Class, or Type)1 Reactor Vessel Lower RPV section flange shell RPV bottom head Core support blocks SA-508 Grade 3, Class 1 RPV top head PZR Shell Integral steam plenum Upper RPV flanged transition shell Steam plenum access ports Upper RPV SG shell Lower RPV SG shell Feed plenum access ports SA-508 Grade 3, Class 2 RPV support gussets RPV support plates SA-533 Type B, Class 2 Core barrel guides SA-479 or SA-240 Type 304 with 0.03% max carbon Pressure instrument tap swagelok reducers Threaded inserts for:
RSV flanges RPV instrument seal assembliesInstrumentation and controls (I&C) access ports PZR heater access ports Steam plenum access ports Feed plenum access ports SA-479 Type 304/304L RPV instrument seal assembliesI&C access port covers SA-240 Type 304/304L I&C access port cover threaded fastenersRPV instrument seal assemblies set screws SB-637SA-193 Alloy 718 (UNS N07718)B8, Class 1 RPV instrument seal assemblies swagelok male connectors SA-479 Type 316/316L RPV flange leak detection tube SA-312 Type 316L; Seamless Threaded fasteners, nuts, and washers for:
Main RPV flange RSV flanges RPV instrument seal assembliesI&C access ports PZR heater access ports Steam plenum access ports Feed plenum access ports SB-637 Alloy 718 (UNS N07718)3 PZR pressure taps Thermowell nozzles SB-166 Alloy 690 (UNS N06690)
NuScale Final Safety Analysis Report Integrity of Reactor Coolant Boundary Tier 2 5.2-34 Draft Revision 2 Safe ends for:
- RRV
- CVCS charging and letdown nozzles
- CRDM nozzles
- RVV
- High point degasification nozzle
- Pressurizer Spray nozzle SB-166 or SB-167 Alloy 690 (UNS N06690)
PZR heater closure flange SB-168 Alloy 690 (UNS N06690)
Ultrasonic testing sensor nozzles SA-182 Grade F304/F304L Low alloy steel weld filler material4 SFA 5.5 SFA 5.23 SFA-5.28 SFA-5.29 Weld filler metal classifications compatible with low alloy steel base metal Stainless steel weld filler material (includes filler material for cladding)
SFA 5.4 SFA 5.9 SFA-5.22 E308, E308L, E309, E309L, E316, E316L ER308, ER308L, ER309, ER309L ER316, ER316L, EQ308L, EQ309L E308, E308L, E309, E309L, E316, E316L Nickel-based alloy weld filler material SFA-5.11 SFA-5.14 ENiCrFe-7 ERNiCrFe-7, ERNiCrFe-7A, EQNiCrFe-7, EQNiCrFe-7A Steam Generators SG tubes See Section 5.4.1.5 SG tube supports SA-240 Type 304/304L Upper and Lower SG supports SA-240 Type 304/304L Integral steam plenum cap SB-564 Alloy 690 (UNS N06690)
Nickel-based alloy weld filler material SFA-5.11 SFA-5.14 ENiCrFe-7 ERNiCrFe-7, ERNiCrFe-7A, EQNiCrFe-7, EQNiCrFe-7A Piping See Table 5.4-3 Piping supports Piping reducers and elbows RVVs and RRVs Refer to Table 6.1-3 RCS Piping RCS injection line, CNV to RPV RCS discharge line, RPV to CNV RPV high point degasification line, RPV to CNV PZR spray supply line, CNV to RPV SA-312 Grade TP304/304L Stainless steel weld filler materials2 SFA 5.4 SFA 5.9 E308, E308L, E316, E316L ER308, ER308L, ER316, ER316L RCS piping reducers and elbows SA-479 Type 304/304L Tee connection to ECCS reset valves SA-182 Grade F304/F304L RCS Check Valves Refer to Table 6.1-3 RCS Excess Flow Check Valves Table 5.2-4: Reactor Coolant Pressure Boundary Component and Support Materials Including Reactor Vessel, Attachments, and Appurtenances (Continued)
Component Specification Alloy Designation (Grade, Class, or Type)1
NuScale Final Safety Analysis Report Integrity of Reactor Coolant Boundary Tier 2 5.2-35 Draft Revision 2 Refer to Table 6.1-3 RCS Injection and Discharge Isolation Valves Refer to Table 6.1-3 Reactor Safety Valves Refer to Table 6.1-3 RCS Piping Supports RCS Piping Supports (short, long, tube)
SA-479 Type 304/304L Pressurizer Support Anchor and Support Plate 180 Degree Piping Supports 90 Degree Piping Supports SA-240 Type 304/304L CRDM Pressure Retaining Components Latch housing Rod travel housing Rod travel housing Plug SA-965 Grade F304LN Note:
(1) When the material is designated as Type or Grade 304/304L, this refers to dual-certified stainless steel material.
(2) Carbon content of unstabilized Type 3XX weld filler materials is restricted to 0.03% maximum.
(3) Solution treatment temperature range prior to precipitation hardening treatment is restricted to 1800 °F to 1850 °F.
(4) Low-alloy steel weld metals for the RPV match the low-alloy steel base metals in terms of chemical composition. Low-alloy steel weld metals for the RPV meet the minimum mechanical property requirements of the selected low-alloy steel base metal.
Table 5.2-4: Reactor Coolant Pressure Boundary Component and Support Materials Including Reactor Vessel, Attachments, and Appurtenances (Continued)
Component Specification Alloy Designation (Grade, Class, or Type)1