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Westinghouse, Presentation GLIMM-RPS-PM-L1-000008, Revision 0
	ML22164A808
Person / Time
Site:	Limerick
Issue date:	06/13/2022
From:	Odess-Gillet W, Tang C; Westinghouse
To:	; Plant Licensing Branch 1
	Marshall M
References
	GLIMM-RPS-PM-L1-000009, Rev 0
	Download: ML22164A808 (49)
	v • d • e

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Warren Odess-Gillett, Fellow Engineer, Licensing Engineering Cal Tang, Technical Advisor, Plant Control Systems Revised Limerick D3 Analysis - NRC Meeting June 16th, 2022 GLIMM-RPS-PM-L1-000009, Revision 0 2

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Summary

In response to NRC OI 8, each credited non-safety system in the D3 Analysis for coping with a PPS CCF was reviewed using the NUREG-6303 diversity categories.

The D3 Analysis will be updated to include a table describing the NUREG-6303 diversity attributes for each credited non-safety system

During this process of reviewing credited non-safety systems, the non-safety Level 8 trip system was analyzed.

- System is comprised of four (4) ABB AC70 PLCs

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- Reviewing the NUREG-6303 diversity criteria it was determined that the level of diversity was insufficient to credit the non-safety Level 8 trip system in the analyses

All other credited non-safety systems have sufficient diversity based on the criteria in NUREG-6303 GLIMM-RPS-PM-L1-000009, Revision 0 3

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

New D3 Analysis Table 6-1 Diverse Non-Safety Systems Credited for Coping with a PPS CCF GLIMM-RPS-PM-L1-000009, Revision 0 4

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

GLIMM-RPS-PM-L1-000009, Revision 0 5

@Westinghouse RBM APRM RWI\\.1 SRM / IRM DFWLCS Dh ersity General Electric Company General Electric Company ABB (Westinghouse)

Reactor Feedpump Bechtel Turbine Trip Circuits, Lo,v Suction Pressures Diversity Independent hardware and MCR displays (ODAs)

Independent hardware and MCR displays (Analog Meters)

Independent hardware and MCR operator

\\Norkstation I analog meters Independent analog hard,,*are (Independent of both PPS and DFWLCS)

Dh'ersity Custom GEH code tun on an executive loop NIA UnixMCR

\\Norkstation Control builder for function blocks i/A Diwrsity DiVHSity Diversin Monitors neutron LPRM's are direct NUMAC, Han-i flux in core inputs to APRMs /

80C36 RBM llllcropro cessor Monitors neutron SR.M: / IRM Analog flux in core detectors directly to associate analog drawer Controls reactor Independent, non-AC450 level via speed safety related, demand to non-reactor level safety related feed\\Nater flo,N and reactor feedwater steam line fl ow pumps sensors Provides trip Independent, non-Analog signal to AIB/C safety related, reactor feedwater feedpump suction pump turbine pressure switches speed control and time delay system relays (5s for C, 10 for B, and 15s for A tufibine trip )

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

GLIMM-RPS-PM-L1-000009, Revision 0 6

System Human Design Sofhvare Functional Signal Equipment Diversi~I Diversity Diversi!J DiYe1*si!J Divusin Diversin*

DEHC Westinghouse Independent OvationMCR Conb"ols reactor Independent, non-Ovation 3 3. I hardware and workstation pressure via safety related, MCR operator Ovation turbine control reactor and MSL workstation Control valves and bypa s pressure sensors Builder for valves function blocks Plant Process Scientech Independent

R*Time Monitors plant Independent RTP 0 Computer (PPC) hardware and (MCR parameters via sensors HP servers MCR operator Displays) dedicated I/0 Monitors Cisco network

,Norkstations

Custom shared sensors s,Nitches (multiple)

Scientech signal via code (system independent servers)

I/0 Reactor Feedwater Wood,Nat*d Independent Conb"ol Assistant Conb"ols reactor

Automatic MicroNet Pump Turibine hardware and level via speed input from (Motorola (RFPT) speed dedicated MCR demand to non-DFWLCS MPC5200) conb"ol hand s.Nitches safety related

Manual input reactor feedwater fromMCR hand switches pumps

Independent speed sensors Recirculation Flow Siemens Independent PLC: Simabc Step Conb"ols Manual input from Simatic S7400 Control hardware and 7 for programing recirculation pump MCR operators Adjustable Speed dedicated MCR speed (neutron Drive pushbuttons flux) via dedicated

@Westinghouse inputs from MCR pushbuttons

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

GLIMM-RPS-PM-L1-000009, Revision 0 7

s,stem Human Design Sofhvare Functional Signa*

Equipment Dhersity Dhersitv Diversi!J Dive1*si:!I Dirve1*sirn Dirversi!h Reac or JV'.[mual GENuclearr Indepe11dent NIA Conh"ols read or Manual mput from TTL Control (RMCS) hard'\\.vare and po\\¥er via control MCR opeFators dedicated MCR of rod positions control panel via d.edicarred inpu~ from MCR control panel

@Westinghouse

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

D3 Analysis Changes GLIMM-RPS-PM-L1-000009, Revision 0 8

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Impacted D3 Analyses Without the L8 Trip Device

Section 3.2 Event 15.1.2 FW controller failure-maximum demand with no turbine bypass

Section 3.3 Event 15.1.2 FW controller failure-maximum demand with turbine bypass

Section 3.4 Event 15.1.3 Pressure regulator failure-open

Section 3.19 Event 15.3.1 Trip of two recirculation pumps

Section 3.34 Event 15.6.5 LOCA inside containment-main steam line break

Section 5.6 Spurious HPCI initiation GLIMM-RPS-PM-L1-000009, Revision 0 9

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Summary of Analysis Conclusions Without the L8 Trip Device Event 15.1.2 FW controller failure-maximum demand with no turbine bypass:

Only one of the three feedpump turbines will trip due to low suction pressure (C feedpump). Pumps A and B are not tripped on low suction pressure and will ramp up to maximum demand and inject into the RPV.

Event 15.1.2 FW controller failure-maximum demand with turbine bypass:

Only one of the three feedpump turbines will trip due to low suction pressure (C feedpump). Pumps A and B are not tripped on low suction pressure and will ramp up to maximum demand and inject into the RPV. DFWLCS and DEHC control level and pressure, respectively.

Event 15.1.3 Pressure regulator failure-open:

Auto MSIV isolation on main steam line pressure low is specified for DPS, thus the main turbine will trip on reverse power (from turbine protection system) leading to a loss of motive steam to the feedpumps 15.3.1 Trip of two recirculation pumps:

Current analysis indicates Level 8 trip is avoided after the two recirculation pumps tripped, and level and pressure are controlled by the DFWLCS and DEHC, respectively and the reactor power is reduced by the decrease in core flow. Operation procedure requires a manual scram after the two pump trip to avoid operation in the instability region of the power/flow map. Even if it is assumed that the level swells and exceed the Level 8 trip setpoint, the main and feedpump turbines will not trip because the Level 8 trip is assumed to fail to respond. Results would be the same 5.6.5 LOCA inside containment-main steam line break:

Turbine will trip on reverse power after MSIV auto closure. Subsequently recirculation pumps trip on 13kV bus fast transfer. Reactor power decreases due to recirculation pump trips and depressurization. Manual scram will occur upon EOP entry.

5.6 Spurious HPCI initiation:

Steam lines will be flooded regardless of tripping the RFPTs or not due to worst case initial conditions set a low reactor pressure and the turbine offline. Water will be introduced into the Main Steam Lines and operator response to high reactor level is as currently noted in the D3 response.

GLIMM-RPS-PM-L1-000009, Revision 0 10

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

D3 Analysis Markups GLIMM-RPS-PM-L1-000009, Revision 0 11

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 3.2 Event 15.1.2 FW controller failure-maximum demand with no turbine bypass GLIMM-RPS-PM-L1-000009, Revision 0 12

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 3.2 Event 15.1.2 FW controller failure-maximum demand with no turbine bypass GLIMM-RPS-PM-L1-000009, Revision 0 13

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 3.2 Event 15.1.2 FW controller failure-maximum demand with no turbine bypass GLIMM-RPS-PM-L1-000009, Revision 0 14

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 3.2 Event 15.1.2 FW controller failure-maximum demand with no turbine bypass GLIMM-RPS-PM-L1-000009, Revision 0 15

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 3.2 Event 15.1.2 FW controller failure-maximum demand with no turbine bypass GLIMM-RPS-PM-L1-000009, Revision 0 16

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 3.3 Event 15.1.2 FW controller failure-maximum demand with turbine bypass GLIMM-RPS-PM-L1-000009, Revision 0 17

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 3.3 Event 15.1.2 FW controller failure-maximum demand with turbine bypass GLIMM-RPS-PM-L1-000009, Revision 0 18

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 3.3 Event 15.1.2 FW controller failure-maximum demand with turbine bypass GLIMM-RPS-PM-L1-000009, Revision 0 19

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 3.3 Event 15.1.2 FW controller failure-maximum demand with turbine bypass GLIMM-RPS-PM-L1-000009, Revision 0 20

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 3.3 Event 15.1.2 FW controller failure-maximum demand with turbine bypass GLIMM-RPS-PM-L1-000009, Revision 0 21

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 3.3 Event 15.1.2 FW controller failure-maximum demand with turbine bypass GLIMM-RPS-PM-L1-000009, Revision 0 22

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 3.4 Event 15.1.3 Pressure regulator failure-open GLIMM-RPS-PM-L1-000009, Revision 0 23

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 3.4 Event 15.1.3 Pressure regulator failure-open GLIMM-RPS-PM-L1-000009, Revision 0 24

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 3.4 Event 15.1.3 Pressure regulator failure-open GLIMM-RPS-PM-L1-000009, Revision 0 25

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 3.4 Event 15.1.3 Pressure regulator failure-open GLIMM-RPS-PM-L1-000009, Revision 0 26

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 3.4 Event 15.1.3 Pressure regulator failure-open GLIMM-RPS-PM-L1-000009, Revision 0 27

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 3.19 Event 15.3.1 Trip of two recirculation pumps GLIMM-RPS-PM-L1-000009, Revision 0 28

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 3.19 Event 15.3.1 Trip of two recirculation pumps GLIMM-RPS-PM-L1-000009, Revision 0 29

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 3.19 Event 15.3.1 Trip of two recirculation pumps GLIMM-RPS-PM-L1-000009, Revision 0 30

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 3.19 Event 15.3.1 Trip of two recirculation pumps GLIMM-RPS-PM-L1-000009, Revision 0 31

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 3.19 Event 15.3.1 Trip of two recirculation pumps GLIMM-RPS-PM-L1-000009, Revision 0 32

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 3.34 Event 15.6.5 LOCA inside containment-main steam line break GLIMM-RPS-PM-L1-000009, Revision 0 33

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 3.34 Event 15.6.5 LOCA inside containment-main steam line break GLIMM-RPS-PM-L1-000009, Revision 0 34

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 3.34 Event 15.6.5 LOCA inside containment-main steam line break GLIMM-RPS-PM-L1-000009, Revision 0 35

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 3.34 Event 15.6.5 LOCA inside containment-main steam line break GLIMM-RPS-PM-L1-000009, Revision 0 36

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 3.34 Event 15.6.5 LOCA inside containment-main steam line break GLIMM-RPS-PM-L1-000009, Revision 0 37

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 3.34 Event 15.6.5 LOCA inside containment-main steam line break Section 3.34.5 Continued on next slide GLIMM-RPS-PM-L1-000009, Revision 0 38

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 3.34 Event 15.6.5 LOCA inside containment-main steam line break Section 3.34.5 Continued from previous slide GLIMM-RPS-PM-L1-000009, Revision 0 39

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 5.6 Spurious HPCI initiation GLIMM-RPS-PM-L1-000009, Revision 0 40

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 5.6 Spurious HPCI initiation GLIMM-RPS-PM-L1-000009, Revision 0 41

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 5.6 Spurious HPCI initiation Section 5.6.2 continued on next slide

]a,c GLIMM-RPS-PM-L1-000009, Revision 0 42

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 5.6 Spurious HPCI initiation Section 5.6.2 continued from previous slide

[

GLIMM-RPS-PM-L1-000009, Revision 0 43

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 5.6 Spurious HPCI initiation GLIMM-RPS-PM-L1-000009, Revision 0 44

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 5.6 Spurious HPCI initiation GLIMM-RPS-PM-L1-000009, Revision 0 45

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 5.6 Spurious HPCI initiation GLIMM-RPS-PM-L1-000009, Revision 0 46

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

Section 5.6 Spurious HPCI initiation GLIMM-RPS-PM-L1-000009, Revision 0 47

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

SRM-SECY-93-087 Position 4 GLIMM-RPS-PM-L1-000009, Revision 0 48

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

D3 Analysis Update Schedule GLIMM-RPS-PM-L1-000009, Revision 0 49

- - This record was final approved on 6/10/2022, 9:52:07 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3

D3 Analysis Rev. 2 Schedule

[

]a,c GLIMM-RPS-PM-L1-000009, Revision 0 50

ML22164A808

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