ML20290A618
| ML20290A618 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 07/23/2020 |
| From: | Wolf Creek |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20290A562 | List:
|
| References | |
| WO 20-0041 XX-E-013, Rev. 4, Seq. CN005 | |
| Download: ML20290A618 (20) | |
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CALC NO. WCN-025-CALC-010 I
CALCULATION COVER ENERCON REV.0 0 Exctllenct-EVf!ry ptoje<.r. Every do)! SHEET PAGE NO. 1 of 8 Client: WCNOC UPDATE TO WCNOC CALCULATION XX-E-
Title:
013, PFSSD ANALYSIS Project Identifier: WCN-025 Item Cover Sheet Items Yes No 1 Does this calculation contain any open assumptions, including preliminary information, that require confirmation? (If YES, identify the assumptions.) D ~
2 Does this calculation serve as an "Alternate Calculation"? (If YES, identify the design verified calculation.) D ~
Design Verified Calculation No. _ _
3 Does this calculation supersede an existing Calculation? (If YES, identify the design verified calculation.) D ~
Superseded Calculation No.
Scope of Revision:
Initial Issue Revision Impact on Results:
This calculation documents the changes for the replacement of transformer XNB01.
Study Calculation D Final Calculation ~
Safety-Re lated D Non-Safety-Related - ~
(Print Name and Sign)
Originator: Robert N. Thomas 6Mh?.~#/ Date: 09/20/2018 1
Design Verifier (Reviewer if NSR): Stacey Graybeal k<Y dl~ Date: 09/20/2018
~~
Approver: Austin Tran DlgitatlyslgnedbyAustinTran 09/20/2018 Date: 2018.09.2018:10:10
- 05'00' Date:
Note 1: For non-safety-related calculation, design verification can be substituted by review.
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CALCULATION CALC NO. WCN-025-CALC-010 t--
REVISION STATUS SHEET I
~
ENERCON REV. 0
- Exc,:/1,:nc,:-Evtry project. Every day.
PAGE NO. 2 of 8 CALCULATION REVISION STATUS REVISION DATE DESCRIPTION 0 09/20/2018 Initial Issue PAGE REVISION STATUS PAGE NO. REVISION PAGE NO. REVISION ALL 0 APPENDIX/ATTACHMENT REVISION STATUS APPENDIX NO. NO.OF REVISION ATTACHMENT NO.OF REVISION PAGES NO. NO. PAGES NO.
A 4 0 Page 2 of 8
WCN-025-CALC-CALC NO.
006
':I ENERCON 1r TABLE OF CONTENTS REV. 0 Exceflence-Evtry pro}ecl. Every doy, PAGE NO. 3 of 8 Section Page No.
1.0 Purpose and Scope
4 2.0 Summary of Results and Conclusions 4 3.0 References 5 4.0 Assumptions 5 5.0 Design Inputs 5 6.0 Methodology 7 7.0 Calculations 8 8.0 Computer Software 8
- of List of Appendices Pages A - Markup Updates to XX-E-013 4 Page 3 of 8
WCN-025-CALC-CALC NO.
010
~ UPDATE T O WCNOC
,, ENERCON CALCULATION XX-E-013, Excelknce- Every p10Jtcr. Eve,y doy.
REV. 0 PFSSD ANALYSIS PAGE NO. 4 of 8
1.0 Purpose and Scope
Wolf Creek is performing a systematic replacement of their large oil-filled transformers to address aging concerns and to implement design improvements in support of long term station operation. The first transformer to be replaced is ESF transformer XNB01.
DCP 020021 is replacing XNB01 and the new transformer will have a Load Tap Changer (LTC) to control the voltage supplied to 4.16kV bus NB01 even if the 13.8 kV input voltage level changes. The DCP is also replacing/deleting relays in the MA 104F panel and the relays are addressed by XX-E-013. The purpose of this calculation is to document the impact on Wolf Creek calculation XX-E-013 due to these changes. This calculation is non-safety related per the ENERCON requirements. The Wolf Creek update will be considered "special scope" per the site requirements.
2.0 Summary of Results and Conclusions Wolf Creek calculation XX-E-013 does not have any computations. It is a document used to identify the components required to support the Post Fire Safe Shutdown (PFSSD) functions. Based on the results of this calculation the addition of the LTC controls will not impact the PFSSD function of XNB01. Two overcurrent relays (287/T1 Phase Band Phase C) are removed from the calculation (287/T1 Phase A is replaced with one new relay to monitor all three phases). Also , components 263-1/T1 , 263X-1/T1 , 263-2/T1 and 263X-2/T1 are removed from the calculation . New fault pressure trip relays 263FP K4A and 263FP K4B are added because they provide a trip input for breaker NB00112 (XNB01 input breaker to NB01 ). Cable 15NBK16AA supplies 125VDC to the sudden pressure monitor that contains the two relays at XNB01 . Failure of this cable does not cause the relays to CSP 3.03 Attachment C Page 4 of 8 Revision 2
CALC NO. WCN-025-CALC-010 UPDATE TO WCNOC ENERCON CALCULATION XX-E-013, REV. 0 Excellence-Every project. Every dqy.
PFSSD ANALYSIS PAGE NO. 5 of 8 change state and cause a loss of power to XNB01 . Therefore, cable 15NBK16AA is not a PSFFD related cable. Drawing E-1F9425 impacted by this change and will be revised by DCP 020021 via WIP-E-1 F9425-002-A-1.
The proposed changes to XX-E-013 as a result of DCP 020021 are acceptable.
3.0 References 3.1 Wolf Creek Calculation XX-E-013, PFSSD Analysis , Rev. 4 3.2 E-074-00007, Outline (Tran-Sealed), Rev. W09 3.3 DCP 020021, XNB01 Replacement, Rev. 0 3.4 E- 1F9425, Post Fire Safe Shutdown Logic Diagram Support Function
- Electrical, NB001 Off-Site Power Availability, Rev. 2 3.5 E-1F9910, Post Fire Safe Shutdown Fire Area Analysis, Rev. 15 3.6 E-022-00029, Relay Panels and Fabrication Details, (related to MA104F), Rev. W12 3.7 E-022-00043, Transformer Feeder Wiring (related to XNB01) , Rev.
W09 3.8 E-15000, Electrical Cable and Raceway List, Rev. 67 3.9 E-1 R4431 , Raceway Plan Turbine Building Area-3 EL. 2033'-0", Rev.
2 3.10 E-1 R4331, Raceway Plan Turbine Building Area-3 EL. 2000'-0", Rev.
1 3.11 E- 1R4321, Raceway Plan Turbine Building Area-2 EL. 2000'-0", Rev.
2 3.12 E-1 R4322, Exposed Conduit Turbine Building Area-2 EL. 2000'-0",
Rev. 4 3.13 E-13NB10, Schematic Diagram 13.8kv XNB01 Breaker Rev. 3 4.0 Assumptions There are no assumptions used in the calculation.
5.0 Design Inputs CSP 3.03 Attachment C Page 5 of 8 Revision 2
CALC NO. WCN-025-CALC-010 UPDATE TO WCNOC
' ENERCON CALCULATION XX-E-013, REV. 0 Excelltnce-Evtry project. Eve,yday.
PFSSD ANALYSIS PAGE NO. 6 of 8 Reviews of existing change notices against XX-E-013 were performed to determine if any of the documents impact the changes being performed by DCP 020021 . Results are as follows :
- XX-E-013-004-CN001 - VOID
- XX-E-013-004-CN002 - FINAL - DCP 14209 removes the HMCP breakers from MCC cubicles NG03DBF6 and NG04DBF6, which were added as PFSSD components in CCN XX-E-013-002-CN014 per DCP 13800. These breaker cubicles provide power and control functions for Train A and B emergency diesel generator room supply fan motors DCGM01A and DCGM01 B, respectively . Due to breaker coordination issues, DCP 14209 will modify the power supply to supply 480 VAC power to the diesel generator room supply fan motors DCGM01A and DCGM01 B directly from new load center breakers NG0308 and NG0408, respectively. Breakers NG0308 and NG0408 will supply power to the fan control functions within NG03DBF6 and NG04DBF6, respectively. Therefore, MCC cubicles NG03DBF6 and NG04DBF6 will remain as PFSSD components. The changes per this update do not impact the evaluation performed by this calculation .
- XX-E-013-004-CN003 - COMMITTED - Change Package 14658 is replacing cable from EDGs speed signal generators to the EDGs speed switches. Appendices 1, 2 and 3 are updated to reflect these changes. The changes per this update do not impact the evaluation performed by this calculation.
- XX-E-013-004-CN004 - FINAL - CP 15070 is changing the 120VAC source from system NG to NN for the control room ale unit inlet and exhaust dampers GKHZ0029A/B (Train A) & GKHZ0040A/B (Train B).
CSP 3.03 Attachment C Page 6 of 8 Revision 2
CALC NO. WCN-025-CALC-UPDATE TO WCNOC 010
.::d ENE RCO N CALCULATION XX-E-013, REV.
Excelltnce- Evtry project. E~tty day. 0 PFSSD ANALYSIS PAGE NO. 7 of 8 The changes per this update do not impact the evaluation performed by this calculation.
6.0 Methodology This calculation is a tabulation of cables and components that are required to support the PFSSD power sources and functions. XNB01 is a power source that is required to support the PFSSD functions . The impact of the LTC controls on the PFSSD power supply function was reviewed and determined to not impact the PFSSD power supply function of XNB01. PFSSD components associated with XNB01 are listed in calculation XX-E-013. Some of the components are being removed by DCP 020021 . The calculation was reviewed and components 287/T1(B) and 287/T1(C) are removed from the plant and will be removed from the calculation . Relay 287/T1 (A) is changed to 287 /T1 (A, B, C) because the new digital relay monitors all three phases . Fault pressure monitors 263-1/T1 and 263-2/T1 are being removed from the plant and will be removed from the calculation. Auxiliary relays 263X-1/T1 and 263X-2/T1 are being disconnected/
"abandoned-in-place" and will be removed from the calculation. A new sudden pressure monitor at XNB01 contains trip relays that are used to trip the NB00112 breaker on a fault pressure signal, 263FP relays K4A and K4B. These relays will be added to the calculation. The changes to the relays also impact drawing E-1F9425. This drawing update will be addressed in DCP 020021 via WIP-E-1F9425-002-A-1 . PK4115 via cable 15NBK16AA supplies 125VDC to the sudden pressure monitor. Failure of this power source or cable does not cause the relays to change state and loss of XNB01 . Therefore, PK4115 and cable 15NBK16AA are not required for PFSSD.
CSP 3.03 Attachment C Page 7 of 8 Revision 2
CALC NO. WCN-025-CALC-010 REV. 0
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v_.1_0_ _ _ _ _ _ _ _ _ _ _ _ _---1APPEN DIX A PAGE 1 OF 4 APPENDIX 1 CALCULATION NO. XX - E-013 PFSSD FUNCTION EVALUATIONS (PFSSD SUPPORT) REVISION NO. 4 Page 63 PA0210 is included in the PFSSO design because PA0210 control section provides control power for PA02. No PFSSO loads other than PA02 control power are supplied by PA0210.
Off-site power availability requires that off-site power cables and cables associated with XNB01 and XNB02 protective relays remain free of fire damage. The power cables are associated with the circuit breakers in the preceding table. Off-site protective relays and potential transformers required for PFSSO are identified in Appendix 4 and Appendix 3.
The above discussion addresses safety-related power required for post fire safe shutdown. A limited number of components derive their power from non-safety related busses (PA01 and PA02). The non-safety related power is normally supplied from the unit auxiliary transformer (XMR02). On a failure of XMR02 or the power to XMR02 , a fast bus transfer to the start-up transformer (XMRO 1) occurs. The power path from XMR02 is not included in the PFSSO design because the XMR01 power path is in the PFSSO design. Other than 480V MCCs, there are no other non-safety related PFSSO loads powered from PA01 and PA02. Controls required for off-site and on-site power are identified in Appendix 3.
Forced cooling of ESF transformers XNB01 and XNB02 is not required for PFSSO. Each transformer has a self-cooled rating of 12 MVA and a forced air cooled rating of 16 MVA. The maximum design basis accident (OBA) load is approximately 6 MW which equates to 6 MVA assuming a power factor of 1 (actual power factor is between 0.8 and 1.0). Therefore, there is a 100% margin for the OBA loading for the self-cooled rating. PFSSO loading would be equal to or less than the OBA rating since some of the OBA loads are not credited for PFSSO (e.g. containment spray pumps and safety injection pumps). Therefore, there is adequate justification for not including ESF transformer cooling in the PFSSO analysi Lower medium voltage - 4.16KV components and rela s required for PFSSO are identified in Appendix 4 and Appendix 3.
An evaluation of the potential for a fire-induced lo of off-site power is contained in Appendix 2. This evaluation identified the plant locations where a fire initiate oss of off-site power (loss of non-safety related power) could occur.
Low Voltage System - 480V XNB01 has a Load Tap Changer (LTC) that is used to maintain a set voltage level on the NB01 bus even though voltage level changes on the 13.8kV switchyard supply voltage may occur. This function is local to the transformer. The power for the LTC controller is supplied from the 480VAC power supply to the transforme r for auxiliary loads, such as fans. When operated in a "fixed tap" position (fixed tap setting by Operations) the transformer functions as a standard step down transformer and there are no new failure modes. When placed in the "automatic" mode of operation, the LTC controller monitors the 13.8 kV input and adjusts the tap changer position to maintain the NB01 voltage level at a set level. A failure of the main LTC controller would result in the LTC controls being shifted to the backup LTC controller and the Control Room being informed of the change via an alarm . A loss of 480VAC power to XNB01 will result in loss of power to the main and backup LTC controllers . This would keep the tap setting at a fixed position (the same as the "fixed tap" operation) and the transformer functions as a standard step down transformer.
Therefore, a loss of power to the LTC controllers will not impact the PFSSD function of XNB01 .
CALC NO. WCN-025-CALC-010 REV. 0 FORM APF 05D-OO I-Ol, REV. 10 APPENDIX A ..
PAGE 2 OF 4 APPENDIX 2 CALCULATION NO . XX-E- 0 13 LOSS OF OFF-SITE POWER EVALUATION REVISION NO. 4 Paae 7 TABLE A OFF-SITE POWER AND EMERGENCY DIESEL GENERATOR CABLES CABLE ASSOCIATED BUS / DIESEL GENERATOR DESCRIPTION NB01 DGA NB02 DGB 14NEB02AH X Emerqency Diesel Generator B 14NEB02AJ X Emerqency Diesel Generator B 14NEB02AL X Emerqency Diesel Generator B 14NEB02AM X Emerqency Diesel Generator B 14NEB02AN X Emen:iency Diesel Generator B 14NEB02AP X Emerqency Diesel Generator B 14NEB02AQ X Emerqency Diesel Generator B 14NEB02AR X Emergency Diesel Generator B 14NEB02AS X Emerqency Diesel Generator B 14NEB02AU X Emergency Diesel Generator B 14NEB02AV X Emerqency Diesel Generator B 14NEB11AA X Emerqency Diesel Generator B 14NEB11AB X Emerqency Diesel Generator B 14NEB11AC X Emerqency Diesel Generator B 14NEB11AD X Emerqency Diesel Generator B 14NEB11AF X Emerqency Diesel Generator B 14NEB11AG X Emerqency Diesel Generator B 14NEB11AJ X Emerqency Diesel Generator B 14NEK13AA X Emerqency Diesel Generator B 14NEK13AD X Emerqency Diesel Generator B 14NEK13AE X Emerqency Diesel Generator B 14NEK13AH X Emerqency Diesel Generator B I 14NEK13AJ X Emerqency Diesel Generator B 15MRK10AA X XMR01 fault pressure switch 463-1/T2 XMR01 fault pressure switch 463-2/T2 XMR01 fault pressure relay 463X-1/T2 XMR01 fault pressure relay 463X-2/T2 15MRK10AE X XMR01 Deluge Relay AR7 15MRK10AF X XMR01 Trip On PA0201 Phase Overcurrent 15MRM11AA X XMR01 Transformer Cooling XNB01 Fault 15MRM11AC X XMR01 Lockout Relay Cooling and Oil Level Pressure Trip r\ Trips 15MRX01AG Monitor relays X\ XMR01 Phase Differential Relay 487/T1 15MRX01AL 263FP K4A and X \ XMR01 Neutral Ground Relay 251 N-1/T1 K4B i\ XMR01 Neutral Ground Relay 251 N-2/T1 15MRX01AN X \ XMR01 Feeder to PA0110 15NBA10AA 15NBA10AC X
_\ NB0112 Lockout Relay 286-1/T1 NB0212 Lockout Relay 286-2/T1 X
~ ,1XNB01 Fault Pressure Switch 263-1/T1 XNB01 Fault Pressure Relay 263X-1/T1 XNB01 Fault Pressure Switch 263-2/T1 XNB01 Fault Pressure Relay 263X-2/T1
CALC NO. WCN-025-CALC-010 REV. 0 APPENDIX A PAGE 3 OF 4 APPEND1X4 CALCULATION NO. XX-E-013 PFSSD RELAY LIST REVISION NO. ---1.
(Sorted by Relay Location I Relay ID) Page4 Are Relay SSD Sprtd Hot Cold Normal All Schematic/ Power Feeder Logic R Relay ll s.iG Relay Name Room Other Drawing Ami Location Fun Fun Stdby Sllclwn SlldWn Shclwn One Line Notes Diagram E Bruker (E*1F} V TSR 4 Test Start Relay 5201 D-2 KJ122 s R, M, H X X X X E-13KJ03A M--018--00105 NK5414 - 9411B 0 M-018--00106 9412B 286/T1 6 Lockout Relay ,., These two relays are no X X X
/
9426 0 These two relays are longer inservice and can 486/T1 be removed .
~ removed from the plant. I 5 Lockout Rel/
- - X X V - E-11MR01 - -
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- "'* PK6204 9426 0 E-13MR10 PK6106 E-13NB1 1 151NfT1 5 Ground !Vor Current Relay 4401W TURB MA104F s RM H X y/
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- ~ 6 Phase A Dllfel8nllal Current Relay s vx 9425
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6 4401W TURB MA104F s R,M,H X X X - E-13NB10 - PK6108 - 9425 CJ 6 Phase C Dilrerenllal Cunent 4401W TURB MA104F s R,M, H X X X - E-13NB10 - PK6108 - 9425
- 1 94-1/T \ 6 Switchyard Trip Relay \ 4401W TURB MA104F s R, M, H X X X - E-13NB10 - PK6108 - 9425 0 1 NB01 Undervoltage Relay 3301 C-9 NB0101 s
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127-1/D\ R. M, H X X X - E-12NF01 - NB0101 - 9411A 0 E-13NB01 9412A E-13NF01 152STA \ 1 AC Circuit Breaker Stationary 3301 C-9 NB0104 s R, M, H X X X - E-13EG01A - NK4101 - 9401A 0 Contact 9401B 152 STA L. 1287/T1 (A, B ,C) ~ary r-3:1 Phase A , B ,C Differential Current Relay k - E-13EG01A - NK4101 - 9401A 0 l(.;Qntact E-1 3EG01B 9401B 186/M 1 Lockout Relay 3301 C-9 NB0107 s R, M, H X X X - E-13EG01A - NK4101 - 9401A 0 152 STA 1 AC Circuit Breaker Stationary 3301 C-9 NB0108 s R, M, H X X X - E-13EG01A - NK4101 - 9401A 0 Contact E-13EG01B 9401B 186/M 1 Lockout Relay 3301 C-9 NB0108 s R, M, H X X X - E-13EG01B - NK4101 - 9401A 0 125/F 1 Synchronizing Check Relay s 3301 C-9 NB0109 R, M, H X X X - E-13NB02 - NK4101 - 9425 0 E-1 3NB13 152 STA 1 AC Circuit Breaker Stationary 3301 C-9 NB0109 s R, M, H X X X - E-13NE10 - NK4101 - 9423 0 Contact 186/F 1 Lockout Relay s 3301 C-9 NB0109 R, M, H X X X - E-13NB13 - NK4101 - 9423 0 E-13NE10 9425 286-2/T2 1 Lockout Relay 3301 C-9 NB0109 s R, M,H X X X - E-13NB13 - NK4101 - 9425 0
CALC NO. WCN-025-CALC-010 REV. 0 APPENDIX A PAGE40F 4 APPEND1X4 PFSSD RELAY LIST REVISION NO. 4 (Sorted by Relay Location I Relay ID) Page 24 Relay ID SIG Fire Relay SSD Sprtd Hot Cold Normal Alt Schematic/ Power Feeder Logic R Relay Name Room Am Location Fun Fun Stdby Shclwn Shclwn Shclwn Other Drawing Notes Diagram E One Line Bruker (E*1F) V K526 4 Safety Injection Master Relay 3605 C-27 SB032D s R, M,H X X X - - M-767-00374 NK4416 - 9432 0 M-767-00350 NN0412 K713 4 Pressurizer High Pressure Relay 3601 C-27 SB032D M - X X X - E-138840 M-767-00186 NK4421 BBPCV0456A opens if K713 is 9301 3 E-13SB05 M-767-00189 NN0412 energized. XX-E-013-002-NK4416 CN002 K726 4 Low-Low TAvG or 3605 C-27 SB032D R,H - X - X - E-13AB08 M-767-00188 NK4416 - 9103 0 ABHSD064 in 'OFF/RESET' Relay NN0412 K727 4 Low-Low TAVG or 3605 C-27 SB0320 R, H - -
X X - E-13AB11A M-767-00188 NK4416 - 9103 0 ABHSD064 in 'OFF/RESET' Relay E-13AB1 1B NN0412 E-13AB11C K728 4 Low-Low TAVG or 3605 C-27 SB0320 R,H - X - X - E-13AB11C M-767-00188 NK4416 - 91 03 0 ABHSD064 in 'OFF/RESET' Relay NN0412 K734 4 High-1 RCS Pressure Relay 3605 C-27 SB032D H - - X - - E-13BB12A M-767-00186 NG02BCF2 - 9205 0 E-1388128 M-767-00189 NG02BBF3 NN0412
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263FP (K4A) NK4416 K740 4 Safety lnjec 7 elay 3605 C-27 SB032D H - - X - - E-13EJ06B M-767-00189 NG02BEF2 - 9205 0 E-13SB05 NN0412 NK4416 K741 4 v w-Low 1 Level Relay 3605 C-27 SB032D H - - X - - E-13EJ06B M-767-00189 NG02BEF2 - 9205 0 E-13SB05 NN0412 PK4115r--
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X X
X X
X X
E-138840 E-13NB10 ----- ....' I NK4416 NK4421 PK6108 I
9301 9425 0
0 XNB01 R,M,H X X X E-13NB10 - I PK6108 : - I 9425 0 263-1/T2
~ 6 Fault Pressure Switch Relay Yard - XNB02 s R, M, H X X X - E-13NB11 - PK6204 -
E-13PA14 j
9426 0 263-2/T2
' 6 Fault Pressure Switch Relay Yard XNB02 s R,M, H X X X - E-13NB11 E-13PA14
- PK6204 7 - 9426 0 263FP (K4B) I PK4115 is connected to cable 15NBK16AA. This supplies power to the monitor that houses relays at XNB01 . PK4115 and associated cable 15NBK16AA are not required for PFSSD. Loss of power or cable failure will not cause a loss of XNB01 .
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FORM AIF 05C-002-02, REV. 3 WCNOC OWNERS ACCEPTANCE REVIEW CHECKLIST FOR EXTERNAL CALCULATIONS AND SPECIFICATIONS PAGE 1 OF 5
Title:
Post Fire Safe Shutdown (PFSSD) Analysis Wolf Creek document #: XX-E-013-004- Revision #: N/A CN005 ECDE: Enercon
INITIATING DOCUMENT and revision: CP 020021 R/0 (e.g., PO, CR, SWO)
CHANGE TYPE: X Calculation Specification SAFETY CLASS: SR X SS NSR
DigsigVer 5, 0.45 WCNOC Date:
Reviewer signature: 09/26/18 DigsigVer 5, 0.45 WCNOC Date:
Approver:
10/02/2018
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Title:
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