ML23223A106
| ML23223A106 | |
| Person / Time | |
|---|---|
| Site: | 99902049 |
| Issue date: | 08/23/2023 |
| From: | Essner P Holtec, SMR |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML23223A103 | List: |
| References | |
| 160-USNRC-058 | |
| Download: ML23223A106 (34) | |
Text
www.holtec.com www.smrllc.com ISG-04 Conformance Analysis HOLTEC INTERNATIONAL Date: 8/23/23 Presented By: Patrick Essner SMR, LLC, A Holtec International Company Krishna P. Singh Technology Campus One Koltec Boulevard Camden, NJ 08104, USA
[Not Export Controlled]
www.holtec.com
' "WWw.smrllc.Com lSG-04 Conformance Analysis Date: 8/23/23 Presented By: Patrick Essner SMR, LLC, A Holtec International Company Krishna P. Singh Technology Campus One Holtec Boulevard Camden, NJ 08104, USA
[Not Export Controlled]
.____4
Agenda
" Purpose and Outcome
" Licensing Strategy
" l&C Design Principles V Independence
" communication Independence
" ISG-04
" Conformance of the SMR-160 design to ISG-04 I...
HOLTEC I I t II R N A 1 I C) N A L holtec.com smrltc.com I Page 2 IIIII Agenda HOLT)EC I Purpose and Outcome I Licensing Strategy I I&C Design Principles 1
Independence Communication Independence I ISG-04 I Conformance of the SMR160 design to ISG-04 hoitec.com l smrllc.com l Page 2
Purpose and Outcome U The purpose of the meeting is to c4fl" UUUUU WSL HPLT Familiarize NRC staff with l&C architecture of the SMR-160, focusing on the communication interfaces V Review the regulatory approach related to Digital l&C communications V Understand future NRC work on in this area U The outcome is to obtain feedback from the NRC stall on V The approach for complying with regulations in this area V The specific ways the SMR-160 l&C complies with available guidance and regulations V Future revisions to NRC guidance or regulation in this area holtec.com smrllc.com I Page 3 IIIII Purpose and Outcome HTQJ; E I The purpose of the meeting is to
\\l Familiarize NRC staff with l&C architecture of the SMR-160, focusing on the communication interfaces v
Review the regulatory approach related to Digital l&C communications 1
Understand future NRC work on in this area I The outcome is to obtain feedback from the NRC staff on Y The approach for complying with regulations in this area 1
The specific ways the SMR-160 l&C complies with available guidance and regulations V Future revisions to NRC guidance or regulation in this area holtec.com l smrllc.com l Page 3
__ I.
Licensing Strategy for SMR-160 I&C
" Following Part SO Process
" DNRL-ISG-2022-O1, provides guidance for l&C content related to Part SO V Points to guidance in the design-specific review standard (DSRS) for NuScale
" Generic for I&C focused on Digital l&C systems
" Incorporated some of the lessons learned from review of large LWR designs.
" The guidance emphasizes fundamental instrumentation and control (l&C) design principles of independence, redundancy, predictability and repeatability, and diversity and defense in depth.
holtec.com I smrllc.com I Page 4 IIIII Licensmg Strategy for SMR-160 I&C ttEQNkloEE l Following Part 50 Process I DNRLlSG-2022-01, provides guidance for l&C content related to Part 50 v
Points to guidance in the design-specific review standard (DSRS) for NuScale Generic for l&C focused on Digital l&C systems I
Incorporated some of the lessons learned from review of large LWR designs.
I The guidance emphasizes fundamental instrumentation and control (l&C) design principles of independence, redundancy, predictability and repeatability, and diversity and defense in depth.
holtec.com l smrllc.com l Page 4
DNRL-ISG-2022-O1 "u"n HOLT I N I E R N A I IC) N A I
" In evaluating a CP application, the NRC staff should focus on the following elements of the l&C design:
An overall l&C architecture that demonstrates adherence to the fundamental l&C design principles.
Architecture overview presented October 2022 (Public Meeting ML22263A014)
'ti Plant safety functions allocated to each of the safety-related l&C systems.
i Proposed communications between safety-related and non-safety-related l&C systems.
Covered in this presentation V Regulations that the applicant intends to comply with for the l&C design.
V Regulations that the applicant intends to take exemption from or deems not applicable to its design.
V Topical reports incorporated by reference in the application.
holtec.com I smrllc.com I Page 5 IIIII H O DNRL-ISG-2022-01WWIT.EC I
In evaluating a CP application, the NRC staff should focus on the following elements of the l&C design:
\\I
\\I Y
Y Y
Y An overall l&C architecture that demonstrates adherence to the fundamental l&C design principles.
Architecture overview presented October 2022 (Public Meeting ML22263A014)
Plant safety functions allocated to each of the safety-related l&C systems.
Proposed communications between safety-related and non-safety-related l&C systems.
I Covered in this presentation Regulations that the applicant intends to comply with for the l&C design.
Regulations that the applicant intends to take exemption from or deems not applicable to its design.
Topical reports incorporated by reference in the application.
holtec.com l smrllc.com I Page 5
I&C Fundamental Design Principles
" independence
" redundancy
" predictability and repeatability
" diversity and defense-in-depth (D3)
__ I....
" HOLTEC N I R N A 1 I () \\ \\ L holtec.com I smrllc.com I Page 6 Illll I&C Fundamental Desugn PrInCIples HOLTEC I independence I redundancy I predictability and repeatability I diversity and defense-in-depth (D3) holtec.com l smrllc.com l Page 6
I&C Fundamental Design Principles
" in ependence
" redundancy
" predictability and repeatability
" diversity and defense-in-depth (D3)
HOLTEC I. R NAI I0\\ '.
holtec.com I smrllc.com I Page 7 IIIII I&C Fundamental Desugn PrInCIples
.HOL.C I redundancy l predictability and repeatability I diversity and defense-in-depth (D3) holtec.com I smrllc.com l Page 7
Independence U Required to demonstrate independence of the l&C systems V between redundant portions of a safety system V between safety systems and the effects of a DBE V between safety systems and other systems U Concepts to address are:
V physical independence V electrical independence V communications independence V functional independence
""uii HOLTEC I NT Ii R NAT IONA L holtec corn I smrllc.com I Page 8 IIIII Independence HOLW l Required to demonstrate independence of the l&C systems V between redundant portions of a safety system Y
between safety systems and the effects of a DBE Y
between safety systems and other systems I Concepts to address are:
V physical independence V
electrical independence V communicationsindependence Y
functional independence holtec.com I smrllc.com l Page 8
Independence
" Required to demonstrate independence of the l&C systems V between redun ant portions of a safety system between safety systems and the effects of a DBE V between safety systems and other systems
" Concepts to address are:
V physical independence V electrical independence V co munications independence V functional independence U....
HOLTEC I N T ( K N A I C) N A I holtec.com I smrlic.com I Page 9 IIIII Independence HOLW I Required to demonstrate independence of the l&C systems Y between redundant portions of a safety systeig
- 55);
VI between safety systems and the effects of a DBE V Triatween safety systems andmthersst I Concepts to address are:
V physical independence Y
electrical independence V g1:immunlcatlonsIndepenrdg V
functional independence holtec.com l smrllc.com l Page 9
Communications Independence
__ U..'.
HOLTEC I N T t R N A I I C) N A L U Communication independence must exhibit adequate independence V among redundant portions of the safety system V between safety and nonsafety systems U The design of the data communication system V meets IEEE Std 603-1991, Section 5.6 V conforms to the guidance for the separation and isolation of the data processing functions of interconnected computers in IEEE Std 7-4.3.2, Section 5.6, as endorsed by RG 1.152.
holtec.com I smrllc.com I Page 10 Communications Independence HOLTEC I Communication independence must exhibit adequate independence V among redundant portions of the safety system Y
between safety and nonsafety systems I The design of the data communication system V
meets IEEE Std 603-1991, Section 5.6 Y
conforms to the guidance for the separation and isolation of the data processing functions of interconnected computers in IEEE Std 7-4.3.2, Section 5.6, as endorsed by RG 1.152.
holtec.com l smrllc.com l Page 10
DI&C-ISG-04 Highly-Integrated Control Rooms - J ""
Communications Issues (HICRc)
" This Interim Staff Guidance addresses the design and review of digital systems proposed for safety-related service in nuclear power plants.
V Address only selected digital aspects of such systems.
" Specifically addresses issues related to V interactions among safety divisions V between safety-related equipment and equipment that is not safety-related.
holtec.com smrllc.com I Page 11 DI&C-ISG-04 Highly-Integrated Control Rooms -
HgLIT'EE Communications Issues (HICRc)
I This Interim Staff Guidance addresses the design and review of digital systems proposed for safety-related service in nuclear power plants.
\\l Address only selected digital aspects of such systems.
I Specifically addresses issues related to V
interactions among safety divisions V between safety-related equipment and equipment that is not safety related.
holtec.com l smrllc.com l Page 11
DI&C-ISG-04 Areas of Interest nn"
- HOLT I \\I I I. 1< N A 1 I C) N \\ I
- 1. interdivisional communications - communications among different safety divisions or between a safety division and a non-safety entity
- 2. command prioritization - selection of a particular command to send to an actuator when multiple and conflicting commands exist
- 3. multidivisional control and dispi displays that are associated witl safety and nonsafety functions y stations - use of operator workstations or multiple safety divisions and/or with both
- 4. digital system network configuration - the network or other interconnection of digital systems that might affect plant safety or conformance to plant safety analysis assumptions
" Areas of Interest #1 through 3 are each addressed in a separate section of ISG-04.
Area of Interest #4 has implications concerning each of the first three and is incorporated into those sections as needed holtec corn I smrllc.com I Page 12 DI&C-ISG-04 Areas of Interest HOLTEC 1.
2.
interdivisional communications - communications among different safety divisions or between a safety division and a non-safety entity command prioritization - selection of a particular command to send to an actuator when multiple and conflicting commands exist multidivisional control and display stations - use of operator workstations or displays that are associated with multiple safety divisions and/or with both safety and nonsafety functions digital system network configuration - the network or other interconnection of digital systems that might affect plant safety or conformance to plant safety analysis assumptions I Areas of Interest #1 through 3 are each addressed in a separate section of ISG-O4.
Y Area of Interest #4 has implications concerning each of the first three and is incorporated into those sections as needed holtec.com I smrllc.com l Page 12
Questions for Staff
_ " I HOLT
" Does the staff see issue in utilizing lSG-04 guidance in complying with regulations related to digital l&C and conforming to guidance in the NuScale DSRS?
" Are there any plans to consolidate ISG-04 guidance into a BTP or revision to Chapter 7 NUREG 0800 guidance?
V If so is there a timeline?
" Are there any gaps the NRC staff feels are in lSG-04 that would need to be addressed by a licensee?
holtec.com I smrllc.com I Page 13 IIIII Questions for Staff "gs-IDES l Does the staff see issue in utilizing lSG-04 guidance in complying with regulations related to digital l&C and conforming to guidance in the NuScale DSRS?
I Are there any plans to consolidate lSG-04 guidance into a BTP or revision to Chapter 7 NUREG 0800 guidance?
V If so is there a timeline?
I Are there any gaps the NRC staff feels are in lSG-04 that would need to be addressed by a licensee?
holtec.com I smrllc.com l Page 13
Summary of Closed Meeting Materials
__ nn" HOLTEC I N I I K N A I I C) N A I U Overview of the l&C architecture focusing on communication V between redundant portions of a safety system V between safety systems and other systems
" Summary of how the SMR-160 l&C architecture complies with staff positions associated with the three focus areas of ISG-04 V interdivisional communications V command prioritization V multidivisional control and display stations
- Transition to CLOSED portion of the meeting at this time***
holtec corn I smrllc.com I Page 14 IIIII Summary of Closed Meeting Materials idOLmEC I Overview of the l&C architecture focusing on communication Y
between redundant portions of a safety system V
between safety systems and other systems I Summary of how the SMR-16O l&C architecture complies with staff positions associated with the three focus areas of ISG-O4 V
interdivisional communications VI command prioritization V multidivisional control and display stations
- Transition to CLOSED portion of the meeting at this time***
holtec.com l smrllc.com l Page 14
"i"n Closed Portion Agenda HOLTEC El:
holtec.com I smrllc.com I Page 15 Closed Portion Agenda
((
holtec.com l smrllc.com l Page 15
""in Scope HOLTEC I ILk NA I IC) NAL El:
holtec.com I smrltc corn Page 16 lllll Scope HOW holtec.com l smrllc.com l Page 16
SMR-160 I&C Architecture EL HOLTEC I \\ IL RN All U' \\ I holtec.corn I srnrllc corn I Page 17 IIIII SMR-160 I&C Archltecture HOLTEC
((
holtec.com l smrllc.com l Page 17
SMR-160 I&C Architecture fl HOLTEC I L R N A 1 I C) N, L EL holtec.com I smrllc.com I Page 18 IIIII SM R-160 I&C Architecture
.HOLTEC
[I holtec.com l smrllc.com l Page 18
SMR-160 I&C Architecture
[I:
4" U....
iW HOLTEC I I I holtec.com I smrllc.com I Page 19 IIIII SMR-160 I&C Architecture WOLTEC
((
holtec.com l smrllc.com l Page 19
Interdivisional Communications U
HOLTEC I N I I R N A I I I ?C A I
[I:
holtec.com J smrllc.com I Page 20
@IIIII InterdIVIsmnal Communications HOL
((
holtec.com l smrllc.com l Page 20
Interdivisional Communications HOLTEC
() \\
EL holtec.com smrllc.com I Page 21
@IIIII Interdwusnonal Communications
.HOLW
[I holtec.com l smrllc.com l Page 21
UI.
Interdivisuonal Communications HO LTEC I N I [RN A II() N Al El:
holtec.com I smrllc.com I Page 22
@IIIII InterdIVIsmnal Communications HOL
((
holtec.com l smrllc.com l Page 22
Interdivisional Communications HOLTEC
()
[I:
holtec corn I srnrllc.corn I Page 23
@IIIII InterdIVISIonaI Communications
.HOLW
((
holtec.com l smrllc.com l Page 23
Interdivisional Communications H P LT E C
[F holtec.com I smrllc.com I Page 24
@IIIII InterdIVISIonal Communications
.HOLW
[I holtec.com l smrllc.com l Page 24
nu" Interdivisional Communications H,9LTEC EE holtec.com I smrtlc.com I Page 25
@IIIII InterdIVISIonal Communications HOL
((
holtec.com l smrllc.com l Page 25
Interdivisional Communications __ Un HOLTEC II I()
EL holtec.com smrllc.com I Page 26
@IIIII InterdIVISIonal Communications HE
((
holtec.com l smrllc.com l Page 26
Interdivisional Communications EL qfl\\ "UIU" HOLTEC holtec corn I smrllc.com I Page 27
@IIIII InterdIVIsmnal Communicatlons
.HOLW
((
holtec.com l smrllc.com l Page 27
Command Prioritization U....
HOLTEC N I F. H N A 1 I U N \\ I El:
holtec.com I smrllc.com I Page 28
@IIIII Command Prlorltlzatlon HOL
((
holtec.com l smrllc.com l Page 28
Command Priorutuzatuon HOLTEC
[I:
holtec.com I smrllc.com I Page 29
@IIIII Command Prlorltlzatlon HOLW
[I holtec.com l smrllc.com l Page 29
Command Pruoritizatuon. I HOLTEC IN It RN All C) N,'
FE holtec.com I smrllc.com I Page 30 Command Prioritization
[I holtec.com I smrllc.com l Page 30
Multidivisional Control and Display Stations LI:
Nuns HOLTEC
!I I(} \\
holtec.com I smrllc.com I Page 31
@lllll MultIdIVIsmnal Control and Display Stations HOLMEC
((
holtec.com I smrHc.com l Page 31
Multidivisional Control and Display Stations HOLTEC
[I:
holtec.com I smrllc.com I Page 32 IIIII Multidivisional Control and Display Stations HOEmE
((
holtec.com l smrllc.com I Page 32
4fl I..
Conclusion 'SP HOLTEC FE holtec.com I srnrllc.com I Page 33 Conclusion
((
holtec.com l smrllc.com l Page 33
Questions or Comments?
II...
HOLT Nil RNAI ()\\ \\1 I Are there any aspects of evaluation that are lacking in the current Whitepaper?
holtec.com I smrllc.com J Page 34 Questions or Comments?
I Are there any aspects of evaluation that are lacking in the current Whitepaper?
holtec.com l smrllc.com l Page 34