ML073300559
| ML073300559 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 11/15/2007 |
| From: | Scherer A Southern California Edison Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| PCN 574 | |
| Download: ML073300559 (62) | |
Text
A. Edward Scherer JSOUTHERN EDISON CALIFORNIA An EDISON INTERNATIONAL@ Company Manager of Nuclear Regulatory Affairs November 15, 2007 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001
Subject:
Docket Nos. 50-361 and 50-362 Response to Requests for Additional Information on the Proposed Amendment for Degraded Voltage Setpoints, Proposed Change Number (PCN) 574 San Onofre Nuclear Generating Station, Units 2 and 3
References:
- 1. September 24, 2007 letter from N. Kalyanam (NRC) to Richard M Rosenblum (SCE),
Subject:
San Onofre Nuclear Generating Station, Units 2 and 3 - Request for Additional Information on the Proposed Amendment to Revise Degraded Voltage Instrument (TAC NOS.
MD4419 AND MD4420)
- 2. October 18, 2007 letter from N. Kalyanam (NRC) to Richard M.
Rosenblum (SCE),
Subject:
San Onofre Nuclear Generating Station, Units 2 and 3 - Request for Additional Information on the Proposed License Amendment on Degraded Voltage Setpoints (TAC Nos.
MD4419 and MD4420)
- 3. February 8, 2007 letter from B. Katz (SCE) to Document Control Desk (NRC),
Subject:
San Onofre Nuclear Generating Station Units 2 and 3, Docket Nos. 50-361 and 50-362, Proposed Change Number (PCN)-
574, Degraded Voltage Setpoints
Dear Sir or Madam:
By letters dated September 24, 2007 and October 18, 2007, the Nuclear Regulatory Commission issued requests for additional information (References 1 and 2) regarding Proposed Change Number (PCN)-574, Degraded Voltage Setpoint (Reference 3).
Enclosure 1 provides SCE's responses to the requests for additional information.
P.O. Box 128 San Clemente, CA 92672 949-368-7501 Fax 949-368-7575
Document Control Desk November 15, 2007 Our PCN-577 submittal of March 30, 2007 and PCN-574 both request changes on Technical Specification page 3.3-34. Therefore, if PCN-577 is approved before PCN-574, the affected page will have to be resubmitted to incorporate the PCN-577 change.
If you have any questions or require additional information, please contact Ms. Linda T.
Conklin at (949) 368-9443.
Sincerely, Enclosures cc: E. E. Collins, Jr, Regional Administrator, NRC Region IV N. Kalyanam, NRC Project Manager, San Onofre Units 2 and 3 C. C. Osterholtz, NRC Senior Resident Inspector, San Onofre Units 2 and 3
Enclosure I SCE Responses to NRC Requests for Additional Information PCN-574 Degraded Voltage Setpoints
ENCLOSURE1 NRC Request for Additional Information of September 24, 2007 NRC Question 1:
Setpoint Calculation Methodology: Provide documentation (including sample calculations) of the methodology used for establishing the limiting setpoint (or nominal setpoint) and the limiting acceptable values for the As-Found and As-Left setpoints as measured in periodic surveillance testing described below. Indicate the related Analytical Limits and other limiting design values (and the sources of these values) for each setpoint.
SCE Response:
- a. Documentation (including sample calculations)
Documentation (including sample calculations) of the methodology is provided in calculation E4C-130, ECN A47480, "TLU calculation for Undervoltage relay circuit at Class 1E 4 kV switchgear," provided as Attachment 1. This calculation establishes limiting setpoints and limiting acceptable values for as-found and as-left values.
- b. Related Analytical Limits and other limiting design values Please refer to page 9 of calculation E4C-1 30, ECN A47480, provided in Attachment 1 and duplicated for convenience on the next page.
- 1) Upper analytical limit voltage for the degraded voltage relay settings The calculated analytical upper limit voltage for the maximum reset voltage of the degraded voltage protection relay is 4161 V at the Class 1 E 4.16 kV buses. Refer to calculation E4C-090, CCN 117, Auxiliary System Voltage Regulation, which was provided as Attachment J to Enclosure 2 to our Proposed Change Number 561, submitted May 27, 2005.
- 2) Lower analytical limit voltage for the degraded voltage relay settings The lower analytical limit voltage adequate for continuous operation of Class 1 E electrical systems (4.16 kV, 480 V, and 120 V), is 4100 V at the Class 1E 4.16 kV buses. This value is calculated in calculation E4C-090, ECN A44810, Auxiliary System Voltage Regulation, page 1 of which is provided in Attachment 2.
As indicated in our PCN-574 submittal, since 4100 volts on the Class 1E 4.16 kV buses did not provide adequate voltage to some 120 V power circuits and 480 V motor control centers (MCCs), design modifications were made to improve voltages at 480 V MCCs and 120V power distribution systems. Calculation E4C-082, System Dynamic Voltages During DBA, verifies that at the lower analytical limit voltage of 4100 V, all Class 1 of 7
E&TS DEPARTMENT CALCULATION SHEET Project or ECP: SONGS 2 & 3 Cabc No. E4C-130 QKtTI HI f~al f,. r H A r If 0 ; I ' i =A VV1. QMit~kripar Sh~t of REV ORIGINATOR IDATE I IRE_ __DATE IREV IORIGINATOR DATE IRE DT C. B. Whittle 5/16120 Joshua Park 5/16/2005 a:
1 B.6.
Whittle 5/24/2005 Joshua Park 5/24/2005 z 2.1.4 Graphical Summary of Degraded Voltage Relay Setpoints 230 kV Switchyard Voltage = 218 kV Tech Analysis Limits Surveillance P Spec (V) (V)
(V) 4161 Analysis Limit -
I Upper Margin 2.0 PUMax 4159.0 4152.0 DO Max
+ TLU 118.83 Z 4153.1 PUMax DO-Max 118.63
+AVT IF 4134.5 118.30 PUNom . ---- PUNom DONom 118.10 DONo -- 4127.5
-AVT 117.77 PUMin
-TLU DOMin 117.57 . 4109.0 4110.1 PUMin 4103.1 DOMin Margin 3.1 Analysis Limit - 4100.0 Lower SCE 26-426 Rev. 3 J
Reference:
SO123-XXIV-7.15]
Page 2 of 7 E4C-130
1E motors accelerate to their rated speed within the required ESF equipment response time.
NRC Question 2:
Safety Limit (SL)-Related Determination: Please provide a statement as to whether or not the setpoint is a limiting safety system setting (LSSS) for a variable on which the SL has been placed as discussed in Title 10 of the Code of Federal Regulations (10 CFR),
paragraph 50.36(c)(1)(ii)(A). Such setpoints are described as "SL-Related" in the discussions that follow. In accordance with 10 CFR 50.36(c)(1)(ii)(A), the following guidance is provided for identifying a list of functions to be included in the subset of LSSSs specified for variables on which SLs have been placed as defined in Standard Technical Specifications (STS) Sections 2.1.1, Reactor Core SLs and 2.1.2, Reactor Coolant System Pressure SLs. This subset includes automatic protective devices in TSs for specified variables on which SLs have been placed that: (1) initiate a reactor trip; or (2) actuate safety systems. As such these variables provide protection against violating reactor core safety limits, or reactor coolant system pressure boundary safety limits.
Examples of instrument functions that might have LSSSs included in this subset in accordance with the plant-specific licensing basis, are pressurizer pressure reactor trip (pressurized water reactors), rod block monitor withdrawal blocks, feedwater and main turbine high water level trip, and end of cycle recirculation pump trip (boiling water reactors).
For each setpoint, or related group of setpoints, that you determined not to be SL-Related, explain the basis for this determination.
SCE Response:
The degraded voltage relay setpoints are not Limiting Safety System Settings (LSSS) for a variable on which a safety limit has been placed as discussed in Title 10 of the Code of Federal Regulations (10 CFR), paragraph 50.36(d)(1)(ii)(A). The bus voltage setpoints are not related to the definition of "safety limit" in paragraph (i)A of the regulation: "Safety limits for nuclear reactors are limits upon important process variables that are found to be necessary to reasonably protect the integrity of certain of the physical barriers that guard against the uncontrolled release of radioactivity." Voltage on the class 1E buses provides a support function to safety-related components, but does not trigger engineered safety features actuation systems or the reactor protection system.
NRC Question 3:
For setpoints that are determined to be SL-Related: The NRC letter to the Nuclear Energy Institute (NEI) Setpoint Methods Task Force (SMTF) (Reference 3), describes Setpoint-Related TS (SRTS) that are acceptable to the NRC for instrument settings associated with SL-related setpoints. Specifically: Part "A" of the Enclosure to the letter provides limiting 3 of 7
condition of operation notes to be added to the TS, and Part "B" includes a check list of the information to be provided in the TS Bases related to the proposed TS changes.
- a. Describe whether and how you plan to implement the SRTS suggested in the September 7 letter. If you do not plan to adopt the suggested SRTS, then explain how you will ensure compliance with 10 CFR 50.36 by addressing items 3b and 3c, below.
- b. As-Found Setpoint evaluation: Describe how surveillance test results and associated TS limits are used to establish operability of the safety system. Show that this evaluation is consistent with the assumptions and results of the setpoint calculation methodology. Discuss the plant corrective action processes (including plant procedures) for restoring channels to operable status when channels are determined to be "inoperable" or "operable but degraded." If the criteria for determining operability of the instrument being tested are located in a document other than the TS (e.g. plant test procedure) explain how the requirements of 10 CFR 50.36 are met.
- c. As-Left Setpoint control: Describe the controls employed to ensure that the instrument setpoint is, upon completion of surveillance testing, consistent with the assumptions of the associated analyses. If the controls are located in a document other than the TS (e.g. plant test procedure) explain how the requirements of 10 CFR 50.36 are met.
SCE Response:
As discussed in the SCE response to the preceding question, the degraded grid voltage setpoints are not LSSSs for a variable on which a safety limit has been placed. Therefore, this question is not applicable.
NRC Question 4:
For setpoints that are determined not to be SL-related: Describe the measures to be taken to ensure that the associated instrument channel is capable of performing its specified safety functions in accordance with applicable design requirements and associated analyses. Include in your discussion information on the controls you employ to ensure that the as left trip setting after completion of periodic surveillance is consistent with your setpoint methodology. Also, discuss the plant corrective action processes (including plant procedures) for restoring channels to operable status when channels are determined to be "inoperable" or "operable but degraded." If the controls are located in a document other than the TS (e.g., plant test procedure), describe how it is ensured that the controls will be implemented.
SCE Response:
SCE Test Procedure S02(3)-I1-1 1.1A(B)-2, Surveillance Requirement, Unit 2(3) ESF Train A(B), Section 6.4 (provided as Attachment 3 for Unit 2 Train A), is performed every 24 months to verify setpoints (as-found) and to adjust setpoints (as-left). The numerical values for setpoints, measurement and test equipment, and acceptance criteria in these procedures are from design calculations. Attachment 3 is for the existing Technical 4 of 7
Specifications (TS) and Channel 1 ABB 27N relay. Channels 2 through 4 are similar. This procedure will be revised for the new TS limits during implementation of the proposed amendment after NRC approval.
Inoperable or degraded channels are entered into the plant corrective action program per plant procedures, S0123-1-1.3, Work Activity Guidelines, and S0123-0-A5, Tech Spec Limiting Condition for Operation Action Requirement / Equipment Deficiency Mode Restraint (LCOAR / EDMRs). These are screened for operability by the Shift Technical Advisor (Operations) and referred to Engineering for evaluation.
Restoring the channels to "operable" status and the required testing noted above are governed by TS 3.3.7 and its SRs and are controlled by LCOARs or EDMRs as appropriate.
The surveillance test procedures are controlled by the San Onofre Nuclear Generating Station Quality Assurance program.
5 of 7
October 18, 2007 NRC Request for Additional Information on PCN-574 NRC Question 1:
On page 4 of Enclosure 2 to the license amendment request (LAR), it is stated that the sustained degraded voltage signal (SDVS) without safety injection actuation signal (SIAS) will transfer the 4.16 kilovolt (kV) Class 1E bus to the alternate preferred power source, if available.
Please confirm the type of bus transfer scheme. Is it a fast bus transfer scheme, slow/delayed bus transfer scheme, or the dead bus transfer scheme? Please provide a logic diagram for the scheme.
SCE Response:
The Sustained Degraded Voltage Signal (SDVS) without SIAS will transfer the 4.16 kV Class 1E bus to the alternate preferred power source (same train of other unit), if available.
The bus transfer schemes are as follows:
a) Automatic transfer: slow transfer scheme.
The residual voltage relay will initiate the bus transfer when the residual voltage at the 4.16 kV bus decreases below 25% of 4160 V.
b) Manual transfer: dead bus transfer scheme A logic diagram, Figure D-16 of SCE document DBD-S023-120 titled Class 1 E 4.16 kV Crosstie Breaker Manual/Auto Transfer Closing Logic, is provided in Attachment 4.
NRC Question 2:
On page 4 of Enclosure 2 to the LAR, it is stated that the SDVS signal is blocked when the 4.16 kV Class 1E bus is powered from the DG.
Please confirm whether the degraded grid voltage with SIAS signal is also blocked when the 4.16 kV Class 1 E bus is powered from the DG.
SCE Response:
The degraded grid voltage with SIAS signal (DGVSS) is not blocked when the 4.16 kV Class 1 E bus is powered from the DG.
NRC Question 3:
The purpose of 162T timers shown in Figure D-17 in the final safety analysis report (FSAR) is not clear.
6 of 7
Please provide an explanation of the purpose of 162T timers shown in Figure D-17 in the FSAR.
SCE Response:
The 162T timers in Figure D-17 of Design Basis Document DBD-S023-120 are used to "close" the DGVSS window. The timers ensure that 1) load shedding and transfer of the bus to the DGs occurs within the time allowed in the safety analyses, and 2) the voltage dip caused by the starting of the engineered safety features (ESF) load group 2 does not generate a spurious DGVSS. The DGVSS window will enable detection of the degraded voltage in the first ESF load group sequence and will not be affected by the subsequent ESF load starting transients.
7 of 7
Attachment 1 to Enclosure 1 Calculation E4C-130 ECN A47480 TLU Calculation for Undervoltage Relay Circuit At Class 1E 4 kV Switchgear
Southern Calilornia Edison Company PAGE TOTAL NO.
ENGINEERING CHANGE CALC NO. ECN NO./ A47480 OF PAGES NOTICE (ECN)/CALCULATION E4C-130 PRELIM CCN NO. 1 37 CHANGE NOTICE (CCN) BASE CALC. REV. UNIT CCN CONVERSION: CALC.
COVER PAGE 2, &3 CCN NO. CCN- REV.
1
[]NO F1 YES
SUMMARY
CHANGE CALCULATION
SUBJECT:
TLU calc. for Undervoltage Relay Circuit at Class 1E 4 KV Switchgear CALCULATION CROSS-INDEX ENGINEERING SYSTEM NUMBER/PRIMARY STATION SYSTEM O-CLASS Z New/Updated Index Included DESIGNATOR 1804 / PBA, PBB __
] Existing Index is Complete CONTROLLED PROGRAM OR I PROGRAM/DATABASE NAME(S) VERSION/RELEASE NO.(S)
Site Programs / Procedure Impact? DATABASE ACCORDING TO [ ALSO, LISTED BELOW O. NO [ YES,AR No. 060601441-11 S0123-XXIV-5.1 10CFR50.59/72.48 Review: 0 PROGRAM [I DATABASE AR No. 060601441-8 7
- 1. BRIEF DESCRIPTION OF ECN/CCN:
THIS ECN SUPERSEDES ECN A44811 TO E4C-1 30.
This ECN was prepared to support ECPs 060601441-5, 12, 13, & 14 which change pickup/dropout settings and dead band of the degraded voltage relays (ABB 27N relay).
Nominal relay setting (V) Allowable value N Dead band V) tolerance (V)
Pickup Dropout tolerance_(V)
Existing 118.33 118.23 0.1 +/- 0.26 New 118.30 118.10 0.2 +/- 0.53 The new relay settings are based on the revised analytical lower limit voltage of 4100 V at 4.16 kV bus. As summarized above, the allowable value tolerance and dead band were increased. This change will facilitate the relay surveillance acceptance criteria by widening the allowable value tolerance.
The new allowable (as-found) values and as-left values are summarized in section 2.1.1 of this ECN.
This ECN recommends to revise the following documents:
- DGVS relay surveillance test procedures (refer
- Tech. Spec. SR 3.3.7.3 (refer to section 2.2.2) to section 2.2.1)
SITE FILE COPY
- Document DBD-S023-120 (refer to section 2.2.4)
INITIATING DOCUMENT (ECP, OTHER) ECP # 060601441-5 Rev. 0
- 2. OTHER AFFECTED DOCUMENTS;
[3 YES 0 NO OTHER AFFECTED DOCUMENTS EXIST AND ARE IDENTIFIED ON ATTACHED FORM 26-503.
- 3. APPROVED BY: EC: -
ORIGINATOR (Print name/sign/ .) FLS (6ignature/date)
Approval requires PQS *ENf. *al ltion Verified: F Approval requires POS T3EN64 [3ualf.to eiid-* 1_*.
Z, / /." ,-_ _initi&l Initial RE(Print narne/sFg~mdate) . . *' '
Approval requires PrS Qualification Verified: e3EN64
,initiaI
REFERENCE:
S0123-XXIV-7.15]
Site File Copy E4C-130
n C)
ECN NO./ A47480 CALCULATION CROSS-INDEX PRELIM. CCN NO. PAGE 2 OF 37 CON CONVERSION:
Calculation No. - E4C- 130 Sheet _ _ of __ CON NO. CCN--
Calc. rev, INPUTS OUTPUTS Does the II Identify output inletface number and These Interfacing calculations and/or Results and conclusion of the output Interface calc/documefit responsible documents provide input to the subject subject calculation are used In talc/document FLS initials calculation, and if revised may require these interfacing calculations require CON, ECP, TON/Rev., or and date revision of the subject calculation, and/or documents. Change? tracking number.
Ca.c/fiocument No. ... Rev.- Calc/Document No. Rev, No. YES / NO NCDBMEL 90042 11 90042 11 Yes ECPs 060601441-6, 12, 13, & 14 0
Rev. 1 J EOP 060601441-5, 12,13, & 14 Tech. Spec. 196 Yes AR 050200133-2 Tech. Spec. 196 DBD-S023-120 5 Yes ECP 060601441-5 DBD-S023-120 5 E4C-098 3 Yes ECN A45187 E4C-082, ECN A44806 3
- E4C-084, ECN A44B08 0 S02-11-11.1A 2 Yes AR 060601441-11 E4C-085, ECN A44809 0 S02-11-11.1A-2 4 Yes AR 060601441-11 E4C-090, EON A4481 0 4 E40-098, ECN A45187 3 E40-120, ECN A44105 2 S02-11-11.IA 2 S02-1-11.1A-2 4 SCE z-424 11EV. 121US If
REFERENCE:
50123-.XXIV.7,15
IOCN NO.! A474B0 E&TS DEPARTMENT PRELIM. CON NOI Pace 3 nt 37 CALCULATION SHEET CCN CONVERSION:
CCN NO. CCN Project or ECP: SONGS 2 &3 Calo No. E4C-130
Subject:
TLU Calc for Undervoltage Relay Circuits at Class 1E 4 KV Switchqear Sheet __ of
~EV ORIGINATOR. DATE RE DATE IREV ORIGINATOR DATE IEDT 0 C. B. Whittle 5/15/20051 Joshua Park 5116/2005D 1 C. B. Whittle 5/24/2005
....24/2005 Joshua Park 5/24/2005 I PURPOSE 1.1 Purpose The purpose of this calculation is to perform an analysis associated with the Degraded Voltage Relays (ABB 27N) used for Degraded Voltage Protection in the 4kV Switchgears 2A04, 2A06, 3A04, and 3A06. The lollowing analyses are performed for these relays:
A. Determine the Total Loop Uncertainty (TLU) and Allowable Value Tolerance (AVT),
B. Determine the Nominal UV Relay Pickup (PU) and Dropout (DO) Selpoints, C. Determine the As-Found and As-Left acceptance 1or the PU and DO, D. Determine the New Technical Specifications Allowable Values 1.1,1 Background In the mid-1990's, Southern California Edison installed a degraded voltage protection system to ensure Class IE 4.16 kV Buses of San Onoire Nuclear Generating Station (SONGS) separates from offsite power if voltage degrades and remains below the voltage needed to support equipment operability (218 kV). This system could cause SONGS to separate from the preferred power source if the voltage from offsite sources is between 218 kV and 222.2 kV. When in that voltage band, Class 1E 4.16 kV Buses of SONGS could transfer to the standby power source (emergency diesel generators) even though the offsite power remained capable of performing its intended safety function. See SONGS Licensee Event Report No. 2005-003 (Reference 6.6.2) for specific details.
The following electrical systems were modified to reduce the voltage required at the SONGS switchyard from 222.2 kV to 218 kV (refer to PCN 561):
The degraded undervoltage relay settings Power cables for 120 Vac distribution systems 120 Vac control circuits for 480 V MCCs 1.1.2 Approach 1.1.2.1. Requirements of the degraded voltage relay (ABB 27N relay) scheme a) Class 1E 4.16 kV buses with the degraded voltage relay scheme must not separate from the normal preferred offsite power source and transfer to the DG when the switchyard voltage is 218 kV and above.
b) Class 1E 4.16 kV buses with the degraded voltage relay scheme provide adequate voltage to support operability of plant equipment.
1.1.2.2. Degraded voliage relay (ABB 27N relay) setting SCE 26-426 Rev. 3 J
Reference:
3SO 23-XXIV-7. 51 E4C-130
E&TS DEPARTMENT I PRELM.-DCN NO.
CALCULATION SHEET Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLU Calc for Undervolta,,e Relay Circuits at Class 1 E 4 KV Switchgear Sheet of REV ORIGINATOR IATE IRE DATE I REV ORIaINATOR I DATE IRE DATE 0 C. B. Whiltie 5/16/2005 Joshua Park 5/16/20051 I C. B. Whittle 15/24/2005 Joshua Park 5/24120051 ,
a) Maximum pickup (PU) setting of degraded voltage relay In order to ensure that 4.16 kV bus remains connected to the normal preferred ofisite power source when the switchyard voltage is 218 WVand above, the following conditions should be met:
" The maximum reset voltage of the degraded voltage relay should be less than the voltage corresponding to the minimum switchyard voltage of 218 kV.
The voltage at the 4.16 kV level corresponding to the minimum switchyard voltage of 218 kV is the upper analysis limit voltage for the maximum reset voltage of the degraded voltage protection relay.
Calculation E4C-090 (reference 6.1.3) determines the upper analysis limit voltage (4161 V).
" The 4.16 kV bus voltage at 4.11 seconds during load sequencing (refer to 6.1.4 for an explanation of the 4.11 second time delay) should be greater than the maximum reset voltage of the degraded voltage relay when the switchyard voltage is 216 kV.
Calculation E40-082 (reference 6.1.4) verifies that 4.16 kV bus voltage at 4.11 seconds during load sequencing is greater than the upper analysis limit voltage (4161 V) for conservatism.
b) Minimum dropout (DO) setting of degraded voltage relay Operation of the Class 1 E system with the voltage corresponding to the minimum dropout voltage of the degraded voltage protection relay must be adequate to ensure operability of plant equipment. Therefore, the minimum dropout voltage of the degraded voltage relay must be greater than the lower analysis limit voltage.
Calculation E4C-090 (reference 6.1.3) determines the adequacy of the lower analysis limit voltage (4100 V) and verifies that the lower analysis limit voltage is adequate for continuous operation of 4.16 kV &480 V electrical equipment.
Calculation E40-090, ECN A44810, shows that 4100 V at the Class t E buses with the cable modification is adequate for continuous operation of 4.16 kV &
480 V electrical equipment with addition of cable 2AB0407P2 (3-1/0 350 MCM) between 480 V bus 2104 and 480 V MCC 2BD (reference ECP #060401140-
- 95) because the Class 1 E 4.16 kV bus 2A04 with 4100 V does not provide adequate voltage to 480 V MCC 2BD.
SCE26-426 Rev. 3 (
Reference:
SOi23-Xx1V-7.15]
E&TS DEPARTMENT I PRELIM. CCN NO.
CALCULATION SHEET Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLU Cakc for Undervoltage Relay Circuits at Class 1E 4 KV Switchgear Sheet of Sheet of RV ORIGINATOR DATE j IRE DATE RE RIG1NIATOR DATE IEDATE 0 C.B htl /16/2005~ 1Joshua Park 1620 C1S. Whittle 5/24/20051 Joshua Park 5/24/2005, 120 V power distribution systems and 120 V control circuit of Class 1E 480 V MCCs were evaluated to determine that 4100 V at the Class 1 E 4.16 kV buses is adequate for Class 1 E 120 V circuits.
It was concluded that the Class 1 E 4.16 kV bus 2A04 with 4100 V does not provide adequate voltage to a 120 V power circuit (reference ECN A44805 to E4C-120). Design modification is going to implemented to improve voltages at 120V power distribution system (reference ECP # 060401140-96).
It was also concluded that the Class 1E 4.16 kV bus 2A04 with 4100 V provides adequate voltage to a 120 V control circuit of Class 1 E 480 V MCCs (references ECN A44808 to calc. E4C-084, and ECN A44809 to cab. E4C-085-). I Calculation E4C-082 (reference 6.1.4), ECN A4480B, verifies that with the lower analysis limit voltage of 4100 V, all Class 1E motors accelerate to their rated speed within the required ESF equipment response time.
1.1.2.3 Nominal pickup (PU) &dropout (DO) setting and Allowable Value of the degraded voltage relay The nominal PU and DO of the degraded voltage relays were determined based on the upper analysis limit voltage, lower analysis limit voltage, Total Loop Uncertainty (TLU), relay deadband (0.2 V), relay setting tolerance (0.05V),.and design margin.
It has been determined that, due to the unique requirements of the settings involved with these relays, the calculation of TLU and setpoints of these relays will be within the scope and methodology described in JS-123-103C (Reference 6.3.7).
This calculation seeks to minimize the possibility ol unnecessarily dropping the 1E Buses from the grid on low but adequate voltage. In order to achieve this goal the following approach will be taken.
1.) The calculation of the TLU will be refined to eliminate excess conservatism (compared to the previous calculation, reference 6.1.2), while adhering to SONGS standard JS-123-103C (Reference 6.3.7).
2.) The nominal pickup setpoint will be determined considering the relay TLU, the Lower and Upper Analysis Limits, and a design margin.
3.) The calculation of 1he Dropout setpoint is based strictly on applying the minimum acceptable Deadband to the Pickup setpoint.
SCE 26-426 Rev. 3 [eference: S0123-XXIV-7.15]
E4C-13 0
ICCN NO]/ A47480 E&TS DEPARTMENT PRELIM. CCN NO. Paae 6 of E37 CALCULATION SHEET CCN CONVERSION:
CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLU Calc for Undervoltage Relay Circuits at Class 1 E 4 KV Switchcqear Sheet of REV -ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE r O C. B,Whitle 5/16/2005 Joshua Park 5]16/2005.
1 C. B. Whittle 15/24/2005 Joshua Park 5124120OS 1.2 Degree of Accuracy The results of the TLU portion of this calculation are based on statistical methods in accordance with SCO Engineering Standard for Instrument Setpoint/Loop Accuracy Calculation Methodology, JS-123-103C (Reference 6.3.7). A 95% probability at 95% confidence level as endorsed by RG 1.105 (Reference 6.2.1) is used. Uncertainties are calculated to the nearest 0.001%.
Uncertainties and effects which are less than 0.001% will be deemed negligible for purposes of this calculalion (see Assumption 3.1.11).
The results of this calculation are valid under the assumptions specified in Seclion 3.0.
1.3 Margin The margin is established by two primary sources of conservatism included in this calculation.
They are the Miscellaneous Allowance (see Section 3.1.10) and the calculated Design Margin (see Section 2.1.4).
[,O.C LU41) IWV..~
cv.j ¶ rt.cIctcIiLc; 3~JIh..1.AAIV../.t2~J me rcncc:S0j2_-XVV-1A1j E4C-130
ICCN NO./
PRELIM. CCN NO. A47480 Panp 7 of '37 !
E&TS DEPARTMENT CALCULATION SHEET CCN CONVERSION:
CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130 h~~rt~ 'TI I fl~lr~ fnr I )nr4~r~/e-~lt~nr2. P~l~v Circnjit~ at CIa~ 1 B 4 Ky Switchoear Sheet __ 01 REV ORIGINATOR D ATE IRE DATE REV ORIGINATOR DATE IRE DATE 8.Whitl C. B. 15/152C)D Joshua Park OI/U6/2005 1
1 C. 8. WhiIfle 5/24/2005j Joshua Park. ý51/2A12005::ý 2 RESULTS/CONCLUSIONS & REQUIREMENTS 2.1 Results/Conclusions 2.1.1 The setpoints for Degraded Voltage Function (127D-1, 2, 3, & 4 relays - AB3 27N relay).
Table 2.1.1 Design Limit Allowable (As-found) Values As-lefl Values (TLU = +/- 0.70 V) (AVT = +/- 0.53 V) (Max. setting Tot. = +/- 0.05 V)
Item (Max. dead band = C.2 V) (Max. dead band = 0. 2 V) {Max. dead band 0.2 V)
Relay (V) Primary (V) Relay (V) Primary (V) Relay (V)
Max. Rl ay 119.00 4159.0 118.83 4153.1 118.35 pickup Max.Relay 118.80 4152.0 118.63 4146.1 . 118.15 dropout "___'__ __ __ _.
Nom.,relay 118.30 4134.5 118.30 4134.5 118.30 Pickup Nom. relay 118.10 4127.5 118.10 4127.5 118,10 dro out Min.Relay 117.60 4110.1 117.77 4116.0 118.25 Pickup.________ ________________
Min. Relay 117.40 4103.1 117.57 4109.0 118,05 drocout _ /__
2.1.2 Pickup and Dropout Setpoints and Acceptance criteria to be used in Surveillance Test Procedures for the 127D Undervoltage (UV) Relays used for Degraded Voltage Detection. These voltages are at the UV Relay:
Table 2.1.2
""Nominal As-Left Acceptance Band 127D Relays Setpoint As-Found Acceptance Band (Max. setting Tol. = +/- 0.05 V)
_ _tpun_ ............. (Max. dead band = 0.2 V)
Dropout 118.10 Vac 117.57 to 118.63 Vac 118.05 to 118.15 Vac Pickup 118.30 Vac 117.77 to 118.83 Vac 118.25 to 118.35 Vac Notes: The following requirements for the surveillance tests should be met:
- 1. M&TE for calibration which meets or exceeds the following specifications:
- 1) Range is sufficient to measure the DO and PU setpoints (-120 Vac 60Hz).
- 2) Accuracy is +/-0.057% or better with a 120 Vac 60Hz input.
- 3) Temperature Effect does not exceed 0.01% over calibration temperature range (the calculation assumes a calibration temperature range o +/- 9F* per Assumption 3.1.3).
I-.--.
SCE 26-426 Rev. 3 I
Reference:
E&TS DEPARTMENT CALCULATION SHEET Project or ECP: SONGS 2 & 3 Calc No. E4C-1 30 h~-t Till I lrr~rIInripr-vnltarip Rg~I~v Cirr~iiIt~ ~l CI~is~ lE 4KV Switchoear Sheet of REV OR*GINATTO I DATE IRE ' DATE REV ORIGINAT.oR DATE _ IRE _ I D 1 5 0 C. B. Whittle 5/1612005 Joshua Park 5116/2005h E 1 C. B. Whittle 15/2412005 1Joshua Park 5/2412005
- 4) Resolution is 100 pVac or better.
- 5) An Agilent (HP) 3458A Multimeter may be used, under the following conditions:
- a. An Auto-calibration (ACAL) must be perlormed before use and after a 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> warm-up (meter power on) period.
- b. All readings to be taken within +/-9 F0 of the ambient temperature at which the ACAL was performed.
- c. Synchronous Sub-sample Mode.
- d. Use the 100 or 1000 Vac Range.
- 2. Maintain relay temperature within 750 F +/- 10 F during as-left setting and as-found test.
- 3. Increased Frequency of Relay Selpoint Checks In order to validate Assumptions 3.2.1 and 3.2.2, "As-Found" and "As-Left" data for the relay Dropout and Pickup values must be taken within six months of operation at the new setpoints. All data taken shall be iorwarded to engineering for analysis. If any allowable values are exceeded during this interval, Engineering will evaluate the assumption and calibration methodology, Otherwise, Engineering will determine from the data collected, if the assumptions and calibration methodology are correct and determine a new calibration interval for these relays.
2,1.3 Calculated Allowable Values and Technical Specification Allowable Values Table 2.1.3 provides the calculated allowable values from Section 8.5.1 and the current Technical Specification Allowable Values at the 4 kV Bus Level.
Table 2.1.3 Relays Allowable Values in New Allowable Values 127D-1, 2,3,4 the existing Tech. Spec. in Tech. Spec.
127D-1, 2, 3,_4 ~ (section 4.7) (Section 8.5.1)
Maximum AV PU 5 4144.6 V _ 4153.1 V Minimum AV DO >4123.0 V >_4109.0 V SCE26-4-26 Rev. 3 lReference! S0123-YXIV-7.15)
E&TS DEPARTMENT PRELI.CON NO.
CALCULATION SHEET Project or ECP: SONGS 2 &3 Calc No. E4C-130 Subjecl: TLU Calc for Undervoltage Relay Circuits atl Class 1 E 4 KV Switchgear Sheet of REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0 C. B. Whittle 5/16/2005U1 Joshua Park 5/16/2005 BE 1 C. B. Whitlle 5/24/20051 Joshua Park 5/24/2005 2.1.4 Graphical Summary of Degraded Voltage Relay Setpoints 230 kV Switchyard Voltage = 218 kV Analysis limits 0, Tech
- Surveilfance (v) (V) Spec (V) 4161 Anatysis Limit -
Upper Margin 2.0 PUMax 4159.
I DO-Max . 4152.0 118.83 Z 4153.1 DOMa ___ 118.63
.T
________4134.5 IPU-NM ---118.30 PUj.Nom DOONom -- 42. 4OONom 118.10
-AVT _I_ PUMin .... 77 M! , 57 117... \ 4109.0
- TLU 4110.1 PU..Min 4103.1 130VIII1 Margtr 3.1 Analysis Limit - 4100.0 Lower
- - ev J i RejrrLnce: 301.23-XXIV-7.151 E4C-130
E&TS DEPARTMENT I PRELIM. CCN NO.
CALCULATION SHEET Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLU Calc for Undervoltaqe Relay Circuits at Class 1E 4 KV Switchgear Sheet ____ of rREV 0R,!,AT AR DATE ,RE DATE IRE.V OR(GiNATOR DATE IRE . DATE RV OIGIAO DAT IRE 0 C, B. Whittle 5/16120051 Joshua Park 15/16/200511 1 C. B. Whittle 15/24/2005 Joshua Park 15/24/2005 2.2 Requirements 2.2.1 Revise Degraded Voltage System Surveillance Procedures (Reference 6.3.8, and any others affected; Maintenance to identify.) to change the allowable as-found and as-left values of Degraded Voltage Relays 2A0421-127D-1, 2, 3, & 4 to the values shown in Table 2.1.2.
The implementation of this requirement will be tracked by AR 060601441-11 2.2.2 Revise Tech. Spec. SR 3.3.7.3 as shown in section 2.1.3 The implementation of this requirement will be tracked by AR 050200133-2 2,2.3 DELETED 2.2.4 Update the DBD DBD-S023-120 (Reference 6.3.4) must be evaluated for changes due to this calculation.
The implementation of this requirement will be tracked by ECP 060601441-5.
2,2.5 DELETED 2.2.6 DELETED.
2.2.7 Determine 27N relay drift value, based on relay lest data.
The implementation of this requirement will be tracked by AR 080401140-24.
S(CE 26-426 Rev. 3 (Rdferrncr: S0123.XXIV-7.15]
E&TS DEPARTMENT PRELIM. CCN NO.
CALCULATION SHEET Project or ECP: SONGS 2 & 3 Calc No. E4C-130 Subiect: TLU Calc for Undervoltaue Relav Circuits at Class 1 E 4 KV Switchgear Sheet of REV ORIGINATOR DATE IRE r. DATE REV ORIGINATOR DATE IRE DATE o C B.Whiffle 5I11 /20057 Josh, Park 5/161205 cc 1 C. B. Whittle 5/24/20051 Joshua Park 5/24/2005 3 KSSUMPTIONS 3.1 Assumptions Which DO NOT Require Verification 3.1.1 Assumed Setpoint (SP) Value for Percentage of Reading Values Thesetting tolerance for the relay is +/-0.05 Vac (see Assumption 3.1.2). In order to perform the calculation in percent of setpoint, without knowing the exact setpoint (this is to be determined by the calc), an estimate of the setpoint values for the trip and reset is required. Therefore, for conversion of Vac readings only, the undervoltagg relay Pickup (PU) and Dropout (DO) are assumed to be set within +/-0.75 volt of 118 Vac. Therefore, 118 Vac will be used for computational purposes for uncertainties which are in percent of reading (or percent of setting). This assumption will result in extremely small errors; for the 0.05 Vac case, -Error = (0.05/(118+0.75)-(0.05/118))*100% and +Error = (0.05/(1 18-0.75)-(0.05/118))*100%, which is +/-0.00027% This is less than the 0.001% limit assumed to be negligible (see Assumption 3.1.11).
3.1.2 Relay Setting Tolerance The setting tolerance, used for adjustment of the undervoltage relay setpoint during calibration, is assumed to be +/-0.05 Vac.
3.1.3 Calibration Temperature Since the Class 1E SWGR rooms are environmentally controlled with normal &
emergency chiller, calibration temperature is assumed to be between 55 and 82°F (Section 4.4 normal environmental conditions, not calibrated during a LOCA). This temperature band includes the range of temperatures from Summer to Winter conditions.
Since the calibration is assumed to be a relatively short duration event (3 to 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />) the temperature is assumed not to vary by more than +/- 9°F during the calibration, because the room is environmentally controlled.
3.1.4 Humidity Effect Since the Humidity effect is not specified by the manufacturer, it is assumed to be included in the temperature effect, per JS-123-103C section 6.4.1.2 (Reference 6.3.7).
3.1.5 Pressure Effect Since the undervoltage loops consist entirely of electrical/ electronic components, the error. induced by normal environmental pressure changes is negligible and is therefore not considered in this calculation. There are no additional accident pressure
.considerations associated with this environment (see Section 4.4).
SCE 26.426 Ray. 3 1
Reference:
E&TS DEPARTMENT l PRELIM. CON NO.
CALCULATION SHEET Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLU Calc for Undervoltage Relaay Circuits at Class 1E 4 KV Switchgear Sheet of ORGIATOR DATE IRE DATE REV -ORIGINATOR DATE IRE DATE C. B.WhIlIle 15/16/2005~ Joshua Park 5/16/205~
1 C. 13.Whittle 5210 Joshua Park 15124120051 3.1.6 Radiation Effect (Re)
The ESF SWGR room is a low radiation area during both accident and normal conditions (mild environment; see Section 4.4). Therefore, the error induced by normal radiation effects to the Undervoltage Relays and Potential Transformers is assumed to be negligible.
3.1.7 Seismic Effect (Se)
The Undervoltage Relays are seismically qualified devices (see Reference 6.5.1 for the seismic specification). Therefore, the Seismic Effect for the Undervoltage Relays is considered negligible.
3.1.8 Test Equipment Test equipment with an accuracy equal to or better than an Agilent (HP) 3458A Multimeter is to be used for calibration of the undervoltage relays (refer to 4.5 for detailed specifications).
3.1.9 Potential Transformer Accuracy The potential transformers are designed and manufactured per ANSI/IEEE Standard C57.1 3-1993 Requirements for Instrument Transformers (Reference 6.2.2). This standard specifically clarifies that ifthe PT is used in relaying, only the RCF needs to be determined, and this may be achieved either experimentally or by computation. For these PT's, this has been accomplished by the manufacturer (see Attachment 9.1) and need not be repeated inthe field.
This calculation will apply the RCF equation of Section 8.1.12 of IEEE standard C57.13-1993 (Reference 6.2.2) with a calculated burden rather than use the maximum accuracy of tl0.3% with an unknown burden. In addition to the uncertainty applied to the burden (see Assumption 3.1.12), an additional independent, random error of 0.05% will be included (via SRSS) for the uncertainties associated with the voltage variations caused by environmental, manufacturing variations and other effects associated with the PT.
The requirement for the PT, for voltage applications, is an accurate Turns Ratio. Periodic calibration of the PT to verify the turn ratio change is not required because there is no identifiable mechanism other than failure of the PT to cause the turn ratio to change.
3.1.10 Miscellaneous Allowance Per JS-123-103C (Reference 6.3.7), the standard miscellaneous allowance of 4-0.5% of span is generally assumed. The standard does however allow the value to be changed "at the Engineer's discretion". Based on the accuracy of the devices involved (primarily the undervoltage relay repeatability) an allowance of +/-0.5% would be excessive.
Therefore, for purposes of this calculation, a miscellaneous allowance of +/-0.1% of reading (equal to the undervoltage relay repeatability) will be used.
,SCE26-426 RPev.3 IRefrence: SOI23-XXIV-".I5)
E&TS DEPARTMENT I PRELIM. CON NO.
CALCULATION SHEET Project or ECP: SONGS 2 &3 Calc No. E4C-130 Subject; TLU Calc for Undervoltace Relay Circuits al Class 1E 4 KV Switchgear Sheet ot REV ORIGINATOP DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0 C.B. Whittle 5/I 6/120051 Joshua Park 15116V2005 C. B. Whittle 512A12005 Joshua Park 5124/2005 '
3.1.11 Negligible Effects and Values Uncertainties and effects which are determined lo be less than 0.001 % (one thousandth of one percent) will be considered negligible and eliminated from consideration.
3.1.12 Accuracy of the PT Calculated Burden The difference from the average burden for each of the individual PT burdens is less than t 2% (see Section 8.1.1). In order to ensure that this calculation remains bounding and conservative, the mean calculated burden will be used with an uncertainty of +/- 10 % to account for the differences in the individual burdens, manufacturing variations and any other unknown effects.
3.1 .13 Environmental Conditions of the 2(3)A04 and 2(3)A06 Cubicles 2(3)A04 and 2(3)A06 Cubicles are located in the Class 1 E SWGR rooms, which are environmentally controlled with normal & emergency chiller. The relays are mounted inside of the cubicles and will be at a higher temperature than ambient room temperature, but it is reasonable to assume that the temperature elevation is relatively constant and therefore the difference between the highest and lowest temperatures experienced by the relays will be the same as the difference between the highest and lowest room temperatures.
3.1.14 Synchroscope Switch Position The Synchroscope is assumed to be used (switched onto the PT as a burden) only when the associated bus (2A04, 2A06, 3A04 and 3A06) is being transferred (synchronized).
During a degraded voltage event (when the UV relays drop out), the dead bus is automatically transferred to the diesel generator with no synchronization required. E01 Diesel Generator Failure follow-up actions, which manually connect the EDG to a dead bus if the auto circuitry does not function completely, would also activate the Synchroscope. After the grid is stable, synchronization is required to reconnect the 1 E 4 kV buses to offsite power, however at this point the grid has been stabilized and the Synchroscope will only be needed for a short duration (on the order of 5 minutes). The Synchrosoope is not switched into the circuit when the 4 kV bus voltage is near the Undervoltage Relay setpoint, therefore the Synchroscope load is excluded from the PT burden calculations.
3.1.15 Voltage Drop from PT to Undervoltage Relay This calculation will assume a worst case drop in voltage from the PT to the Undervoltage Relay of 0.02 Vac. This assumption is based on the estimated maximum voltage drop determined in Attachment 9.5. The minimum will be conservatively assumed to be zero (0) Vac at the relay. This uncertainty will be applied as a bias since the voltage drop would be normally constant for a constant load.
SCE 26-426]Rev. 3 (
Reference:
S0123-XXIV-7.151 E4C-130
E&TS DEPARTMENT CALCULATION SHEET Project or ECP: SONGS 2 & 3 Cab No. E4C-130 Subiect: TLU Calc for Undervoltage Relay Circuits at Class 1E 4 KV Swltchgear w Sheet __ of REV I OGINATOR DATE IRE.. DATE REV IORIGINATORI DATE IRE DATE 0 C. B. Whitle C. B. WhItile 5/1612005 5t24/2005 Joshua Park Joshua Park 5/16/20051 5/24/2005 14 3.1.16 Confidence Interval A confidence of 2u is conservatively assumed for all uncertainties used as an input to this calculation unless the confidence interval is provided.
3.2 Assumptions Requiring Verification 32.1 UV Relay Deadband Adjustment The manufacturer specified deadband adjustment (difference between the dropout and pickup) for the 127D relays may be set down to 0.5% (see Section 4.2). This calculation assumes that the deadband setting may be adjusted down to 0.2 Vac. This is being done with vendor concurrence (see Attachment 9.3).
3.2.2 UV Relay Drift (D)
Since the vendor drift value is not available, drift allowance for the 127D-1, 2, 3, & 4 (27N) relays is assumed to be +/- 0.45 %. This assumption will be verified by testing (reierence section 2.2.7).
A-.-
SCE 26.426 Rev. 3
Reference:
SO! 23-XXIV-'. 15]
E&TS DEPARTMENT CALCULATION SHEET Project or ECP: SONGS 2 &3 CalcNo. E4C-130 Subiahpt: TLU Calc for tUndervolltre Relay C~ircuits at Class 1E 4 KV Switchaear Sheet of REV j ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0 C. B. Whiltle C. B. Whittle T11;;T205 5/24/2005 Joshua Park Joshua Park 5/16/2D00S
,5/24/2005 L 4 DESIGN INPUTS 4.1 General The SONGS Unit 2/3 Salety-Related 4 kV System consists of four 4 kV Buses. Buses 2A04 and 2AO6 are the Unit 2 Train A and Train B Buses, respectively, while 3A04 and 3A06 are the corresponding buses for Unit 3.
Bus 2A04 contains 21 separate cubicles numbered from 2A0401 to 2A0421. Bus 2A06 contains 20 separate cubicles numbered from 2A0601 to 2A0620. Bus 3A04 contains 20 separate cubicles numbered from 3A0401 to 3A0420. Bus 3A06 contains 19 separate cubicles numbered from 3A0601 to 3A0619. The cubicles containing the undervoltage relays are given in the table below.
Location Function Bus 2A04 Bus 2AO6 Bus 3A04 Bus 3A06 Cubicle 21 17 20 17 Undervoltage Relay ID 2A0421 2A0617 3A0420 3A0617 Numbers 127D-1, 2, 3, 4 127D-1, 2, 3, 4 127D-1, 2, 3, 4 127D-1, 2, 3, 4 4.2 Relay Data for 27N Undervoltage Relay (Reference 6.5.1 excepl as noted)
Device No: 127D-1, 2, 3, 4 (Reference 6.3.1)
Manufacturer: ABB (Reference 6.3.1)
Type: 27N (Reference 6.3.1)
Catalog #: 411T5375-HF (Reference 6.3.1)
Pickup range: 70-120 V Dropout delay: 2-20 seconds Reset time: Less than 2 cycles Control voltage. 100-140 V DC Temperature range: -30 to +70° C Burden: 0.5 VA at 120 V Repeatability (with Harmonic filter):
- a. @ constant temperature & control voltage - +/-0.1%
- b. For allowable dc control power range (100-140 V) - +/-0.1%
- c. Temp. Range: 0 to +55' C - -0.75%
+10 to +40' C - +/--0.4%
-20 to +70' C - t1.5%
- d. Time delay - +/-1 0% or +/-20 milliseconds whichever is greater.
Notes: 1. Deadband: Difference between pickup and dropout can be set as low as +/-0.5 %
- 2. The first three repeatability tolerances should be considered independent and may be cumulative.
1~~...~~
SCE26-4261Rtv,3 R~eference: S0t23-XXtV-7.15t E4C-130
E&TS DEPARTMENT CALCULATION SHEET Project or ECP: SONGS 2 & 3 Caic No. E4C-130 Subiect: TLU Caic for Undervoltaae Relay Circuits at Class 1E 4 KV Switchaear Sheet of REV ORIGWIJATOR DATE ý RE DATE IREV ORIGINATOR JDATE iRE. DT 0 C.B.Whittle 5116/20051 Joshua Park 51/05 1 C. B. Whitile 5/24/2005ý Joshua Park 15/24/20051 4.3 Potential Transformer (PT) Data For the following data, refer to Reference 6.5.3 and Attachments 9.1 and 9.4:
PT ratic: 35:1 MFR: General Electric Model: JVM-3 Thermal Rating:750VA Style: Old No.: 643X094000 New No.: 763X021026 (See Attachment 9.4 for confirmation)
Accuracy: 0.3 W, X, M, Y, 1.2 Z burden @ 60Hz PT Tag Data (Attachment 9.,1):
RCF Burden Angle Power Factor VA Minutes No Load 0.9974 0 I 1.00 Y 1.0019 75 -2 0.85 4.4 Environmental Condition Data FORM 4: ENVIRONMENTAL CONDITIONS DATA SHEET AREA: CB Area B5 (ESF SWGR room) Mild Environment (Reference 6.3.5.)
Parameter Data Reference Normal Temperature 5-50F 6.1.1 Minimum, 'F Normai Temperature 81.7'F 6.1.1 Maximum, 'F Normal Radiation < 1.0 E4 Rads 6.3.5 Value, gamma Reds Normal Pressure 0 psig 6.3.5 Minimum, psig Normal Pressure D psig 6.3.5 Maximum, psig Accident Temperature 95°F 6.3.5 Maximum, °F Accident Radiation < 1.0 E4 Rads 6.3.5 Value, gamma Rads Accident Relative 80 6.3.5 Humidity Range % RH Accident Pressure 0 psig 6.3.5 Maximum, psig SCE262-426Rcy.3 lRcfrcncc: S0123-XXIV-7.15)
E&TS DEPARTMENT PRELiM.(CN NO.
CALCULATION SHEET Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLU Calc for Undervoltage Relay Circuits at Class 1 E 4 KV Switchgear Sheet of REV ORIGINATOR DATE IRE DATE REV_ ORIGINATOR DATE IRE DATE 0 C.B. Whittle C.C. Whittle 5/16/2005 5124/2005 Joehua Park Joshua Park 5/16/2005 15/24/2005 14 4.5 M&TE Used for Setpoint Measurement and Adjustment (Reference 6.5.8)
Model: Agilent 3458A Multimeter (Agilent was formerly Hewlett Packard)
Range: 1D0 Vac range (120 Vac Full Scale)
Mode: Synchronous Accuracy; +/-0.02% of Reading + 0.002 % Range (40Hz lo 1kHz)
Temperature Coefficient lor reading outside of +/- 1 C', but within +/- 5 C' of the last ACAL (See note): -+/-(0.001% of Reading + 0.0001 % Range)/C0 Resolution: 10 pVac Full scale: 120 Vac Range: 1000 Vac range (700 Vac Full Scale)
Mode: Synchronous Accuracy: +/-0.04% of Reading + 0.002 % Range (40Hz to 1kHz)
Temperature Coefficient for reading outside of +_1 C0 , but within +/- 5 CO of the last ACAL (See note):
+/-(0.001% of Reading + 0.0001 % Range)/C' Resolution: 100 pVac Full scale: 700 Vac Note: These specifications rely on an the meter being in a thermally stable environment with the power on for 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> prior to the auto-calibration (ACAL).
4.6 125 Vdc Control Power The 125 Vdc control power to the Undervoltage Relays is maintained within the range of 103 Vdc to 140 Vdc per Reference 6.3.6 page 16.
4.7 Technical Specifications Allowable Values Section 3.3.7 of the current Technical Specification (Reference 6,3.2) gives the following Allowable Values for the Degraded Voltage function:
Dropout > 4123.0 V Pickup !54144.6 V 4.8 Analysis Limits at the 4kV Bus The Lower Analysis Limit for the Undervoltage Relay DO is determined in E4C-090 (Reference 6.1.3) This voltage level ensures that the loads on the ESF Buses have adequate voltage to perform their safety functions.:
ALL = 4100 Vac at the 4 kV Bus SC. 26-426 Rev. 3 JRerermnc: SO 23-XX1V-7.15J E4C-130
SICON NO./ A474B0 E&TS DEPARTMENT PREL1M. CON NO. Paci. 18 nf 37 CALCULATION SHEET CCN CONVERSION:
CcN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130 Suiihiarr TLIJ Calc for 11ndervoltage Relayv Circuits at Class 1 E 4 KV Switchaear Sheet of REV ORIGINATOR. DATE IRE DATE REV ORIGINATOR DATE IRE [DATE
, 1 C. B. Whittle 5/16/2005 Joshua Park 5/24/2005 1 _JC- B.Whittle 15124/20051 Joshua Park 15124/20D51 II Z The Upper Analysis limit for the PU is 4161 Vac per Reference 6.1.4. This voltage ensures that the ESF Buses remain on the preferred power source when the switchyard voltage is 216 KV, ALu = 4161 Vac at the 4kV bus.
4.9 PT Burdens 4.9.1 Individual Component Burdens Load Type Vendors Stated Load BurdenReference 1@ 120 Vac) undervolage relays 0.5 VA (Solid State) 0.5 + j 0 VA 6.5.1 127D-1,2, 3, 4 6.5.4 127F1, 2,3, 4 (CV-2) 2.4 VA g .29 p 0.70 +j2.3DVA (Tap set at 105 Lagging Vac per 6.3.1) 127R1, 2, 3, 4 (SVF) 17 VA @ 27' Lagging 15.15 +j 7.72 VA 6.5.6 Hathaway Digital Fault 50 k Ohms 0.288 4 0 VA 6.5.7 Page 1-21 Recorder IDF 8)
TDV and TDV1 0.2 VA 0.2 + j 0 VA 0 Not in circuit Synchroscope Circuit N/A 0 VA par Assumption 3.1.14 4,9.2 Burdens On Each Transformer (2A04, 2A06, 3A04, 3A06):
Transformer Attached Devices Reference (Burdens) 127D3-3 Undervoltage Circuit 1 127F3 6.4.1 PT a-b 1271R3 TDV Undarvoltage Circult I 127D-4 1271`4 PT b-c 127 R4 127b-1 Undervoltage Circuit 2 127F1 6.4.1 PT a-b PTab127R1 TDV1 DIFR 127D-2 E.4.1 Undervollage Circuit 2 127F2 PT b-c 127R2 ( rsumpeon 11cru r (Synchroscope) Assumption 3.1.14)
Note: Circuit 1 refers to the upper circuit on the elementary and circuit 2 is the lower. They are labeled as such on the elementary drawings.
SCE 26-42( Rev. 3 (
Reference:
SO I23.XXIV-7. IS]
E&TS DEPARTMENT PRELIM. CCN NO.
CALCULATION SHEET Project or ECP: SONGS 2 & 3 Cabc No. E4C-130
Subject:
TLU Calc for Undervoltage Relay Circuits at Class 1 E 4 KV Switchcfear Sheet REV ORIGINATOR DATE IRE DATE IREV ORIGINATOR DATE: IRE DATE
- c. B.Whiffle E/1/2005 Joshua Park 5.1./2005 C. 2. Whitle 5/24/2005 Joshua Park 1/24/2005 5 METHODOLOGY Overview: This methodology is consistent with the requirements of SONGS JS-1 23-103C (Reference 6.3.7) for safety system setpoints. This loop consists of only the primary element (the PT) and the Undervoltage Relay. The only error attributed to the primary element is the Primary Element Allowance (PEA).
The nominal pickup setpoint will be determined considering the relay TLU, the Lower and Upper Analysis Limits and a design margin.
The calculation of the Dropout setpoint is based strictly on applying the minimum acceptable Deadband to the Pickup setpolnt.
The minimum and maximum trip (setpoint +/-TLU) is calculated for both the Pickup and Dropout.
These values are provided for information only.
5.1 Calculation of Primary Element Allowance (PEA) 5.1.1 Calculation of the PT Burden The Transformer burden will .be calculated by summing each of the burdens connected to the PT.
5.1.2 Calculation of the PT Accuracy The only source of error considered for the voltage transformer is the Ratio Correction Factor (RCF), since the ratio of the secondary voltage is the only parameter sensed by the undervoltage relays, Equation 5-1 from IEEE standard C57.13-1993 section 8.1.12 (Reference 6.2.2) provides the RCF for the transformer for a given burden, with measured values of the true ratio and phase angle at zero burden, and one other burden.
Manufacturer tag data, along with the calculated burden for the transformer will be used to find the applicable RCF.
Equation 5-1 RC, zRCF) + [.cj[(RCI, -RCFQ - 0o,)+(y, - )xsin, - ,.)]
Where, B0 =the zero burden for which RCF and y are known, Bf= a burden for which RCF and yare known, B, = the burden for which ROF is to be calculated, 01 and 0, = power factor angles of burdens Bt and Bc, respectively (in radians)
SCE 26-426 Rev. 3 lReferenct: SO 123-XXIV-7.151 E4C-130
E&TS DEPARTMENT PRELIM. CON NO. Pane 20 of 37 CALCULATION SHEET CON CONVERSION:
CON NO. CCN Project or ECP: SONGS 2 & 3 CaLc No. E4C-130
Subject:
TLU CaIc for Undervoltage Relay Circuits at Class 1 E 4 KV Switchgear Sheet __ of REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE C. B. Whitile 5/16120051 Joshua Park 5/16/2005 J C. B. Whittle }5/2412D05 Joshua Park 5/24/2005 RCFO, RCFj and RCFC = transformer ratio correction factors ior burdens B6, B1, and B*,
respectively, yt, Vo = the transformer phase angles, in radians, at burdens B, and BO respectively.
Each transformer burden will be calculated based on connected loads. These burdens will be averaged and then a margin (per Assumption 3.1.12) applied to the average to find the maximum and minimum burden. Based on this a bounding burden will be determined and used for calculating the uncertainty of the RCF due to variation in the burden.
The accuracy of the potential transformer will then be given by determining a bounding (conservative) value for the uncertainty of the RCF, based on the uncertainty in the calculated versus the actual Burden. This uncertainty will be part of the PEA term.
Because it cannot be shown to be a random process, this portion oi the PEA will be applied as a BIAS in the final TLU calculation and will be designated by the symbol PEABurd.
An additional independent and random uncertainty will be applied per Assumption 3.1.9.
This uncertainty will be applied via SRSS in the TLU computation. It will be designated by the symbol PEAp.r.
5.1.3 Voltage Drop from the PT to the UV Relay (PEAvo).
Per Assumption 3.1.15 a bias will be applied to account for the uncertainty of the Voltage Drop from the PT to the UV Relay, due to the cable resistance. This bias will be designated by the symbol PEAvo.
5.2 Calculation of Undervoltage Relay Total Loop Uncertainty (TLU) 5.2.1 The following uncertainties are considered for inclusion per JS-1 23-103C (Reference 6.3.7):
a, PEA as outlined above.
- b. Device Tolerances (Undervoltage Relay only)
- Drift allowance (D)
- Power supply allowance (PSe)
- Temperature allowance (Te - normal & accident)
- Seismic allowance (Se)
- Radiation allowance (Re)
M&TE accuracy (MTEA)
SCE 26-426Rev. 3 1
Reference:
SO123-XXIV-7.I5)
ICCN NO.! A47460 E&TS DEPARTMENT PREUM. CCN NO. Pane 21 of 97 CALCULATION SHEET ISCC'N CCNCONVERSION:
NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLU Calc for Undervollage Relay Circuits at Class 1E 4 KV Switchgear Sheet __ of REV DRIGINATDR I DATE IRE DATE REV ORIGINATOR DATE RE DATE C E.hife Joshua 5f C. a. Whittle Sf4/005 JVhaPak S24/2005]
6 Readability (R)
Readability is +/- east significant digit for digital M&TE
MTEps is _25% of M&TE accuracy per JS-123-1 30 (Reference 6.3.7).
These uncertainties will be combined utilizing the Square Root of the Sum of the Squares Method.
d, Setting Tolerance (ST) Note: Used in lieu of Accuracy in TLU per JS-123-103C (Reference 6.3.7) Section 6.2.
- e. Miscellaneous Allowance (Ma) 5.2.2 Combination of TLU Uncertainties The Square Root of the Sum of the Squares Method as defined in JS-1 23-103C (Reference 6.3.7) is utilized to combine the independent random uncertainties in the determination of the TLU and the biases (PEA in this case) are added. Therefore:
St-R - V TLU = +_.,2~ + D'z + PS 2' + Se'2 + Rc 2+ MTE + ST'2 + Ma'2 + PEAPT. 2 +/- PEABURD. +/- PEAVL) 5.3 Calculation of Undervoltage Relay Allowable Value Tolerance (AVT)
The allowable value (AV) will be calculated per JS-123-1030 (Reference 6.3.7), Section 4.4 from the equation:
2 AVT (D2 +SR2 + R )A Where D is the drift of the undervoltage relay, ST is the setting tolerance of the undervoltage relay and R is the readability of the test equipment.
5.4 Calculation of Undervoltage Relay PU and DO Selpoints 5.4.1 Undervoltage Relay Nominal Pickup Selpoint The Relay Nominal Pickup Setpoint (SPpu) will be determined considering the TLU, the Upper and Lower Analysis Limits and the design margins, 5.4.2 Undervoltage Relay Nominal Dropout Setpoint The Relay Nominal Dropout Setpoint (SPco ) will be determined by applying a set deadband (DB
= the difference between the relay pickup and dropout) to the Pickup Setpoint. Therefore:
SCE 26-426 Rev. 3 [
Reference:
SO123-XXIV-7. 15 E4C-130
lOCN NO./ A474B0 E&TS DEPARTMENT PRELIM. CON NO. - Pane 22 of _27 LALUULATIUN ýMh1L- CcN CONVERSION:
CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130 Subiect: TLU Calc for Undervoltage Relay Circuits at Class 1 E 4 KV Switch ear Sheet __ of _
REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 5 1612 0 0 5 0 C. E. Whittile / 1 Joshua Park 5/1612005 1 . B.Whittle 15/241200 5 j Joshua Park 5/24/2005 SPDo = SPpU- DB 5.4.3 Determination of Design Margins 5.4.3.1 Design Margin to the PU Upper Analysis Limit (Mu)
The undervoltage relay PU setpoint is a increasing setpoint as defined in JS-1 23-113C (Reference 6.3.7) Section 4.7. Therefore, the following equation applies:
SP (Increasing) = ALu + (-TLU) - Mu Where ALu is the upper Analysis Limit (see Section 4.9), Mu is the design margin and (-
TLU) is the negative TLU.
Since the SPu, -TLU and AL are known, the design margin can be determined by rearranging this equation and solving for the design margin. The Design Margin is:
Mu = ALu- (SPpu - (-TLU))
= ALu - SPPu-MAX where SPpu-mAx is the relay's maximum pickup value.
NOTE: A positive or zero margin will meet the requirements and a negative margin does not.
5.4.3.2 Design Margin to the DO Lower Analysis Limit (ML)
Similarly, the Design Margin in the Lower Analysis Limit can be found from:
ML =SPDo - (ALL + (+TLU))
SPDo.MIN - ALL Where ALL is the Lower Analysis Limit (see Section 4.8), ML is the design margin, (+TLU) is the positive TLU and SPDo-MIN is the relay's minimum dropout value.
5.5 Calculation of Undervoltage Relay PU and DO As-Found/As-Left Acceptance Bands 5,5.1 Calculation of Undervoltage Relay As-Found Acceptance Band The As-Found Acceptance band will be the trip or reset setpoint +/-AV (allowable value).
5.5.2 Calculation of Undervoltage Relay As-Left Acceptance Band The As-Left Acceptance band will be the trip or reset selpoint -ST (setting tolerance).
I __J SE26-426 trv. 3 lRcfrerncc: sot 23-XXIV-7. lii E4C-130
E&TS DEPARTMENT CALCULATION SHEET Project or ECP: SONGS 2 & 3 Caic No. E4C-130
Subject:
TLU Calc for Undervol lass 1E 4 KV Switchaear REV ORIGINATOR DATE IRE 0 C. B, Whittle 5/h6/2005 Joshua Park 1 0. B. Whittle 5I24/12005 Joshua Park 5,6 Calculation of Minimum and Maximum Relay DO and PU at the 4 kV Level The Minimum and Maximum Relay DO and PU Values are calculated by applying the TLU to the setpoint (SP). This yields the following equations:
Maximum SP + (+TLU)
Minimum = SP 4- (-TLU) o SCE26-426 Rev. 3 (
Reference:
S0123-XXIV-7.15]
E.4C-130
ICON NO.! A47480 E&TS DEPARTMENT PRELIMl. CCN NO. Pane 24 nI .37 CALCULATION SHEET CON CONVERSION:
CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLU Calc for Undervoltage Relay Circuits at Class 1 E 4 KV Switchgear Sheet of R.EV ORIGINATOR IDATE IRE DATE REV. ORIGIN~ATOR DATE IRE DT o C.2. Whitlle 5I16I2005 Joshua Park 5}1/2005. . T _
1 C. B. Whitile I5124/2005! Joshua Park 5124W2005 I 6 REFERENCES 6.1 SONGS Calculations 6.1.1 M-0073-061 CCN C Normal Environmental Conditions for the 4 kV SwItchoear Protective Relay Setting Calculation.
6.1.2 E4C-098 - 4 kV Switchgear Protective Relay Setting Calculation 6.1.3 E4C-090 - Auxiliary System Voltage Regulation 6.1.4 E4C-082 - System Dynamic Voltages During DBA 6.1.5 J-ZZZ-069 - Out-Of-Tolerance Notification Program (OTN) 6.2 Industry Publication and Standards 6.2.1 NRC Regulatory Guide 1.105 Revision 3 Setpoints For Safety-Related Instrumentation 6.2.2 ANSI/IEEE C57.13-1993 - IEEE Standard Requirement for Instrument Transformers.
6.3 SONGS Documents and Procedures 6.3.1 NCDBMEL Version 03.03.03 - Nuclear Consolidated Database Master Equipment List.
6.3.2 SONGS 2 & 3 Technical Specifications (See TS Section 3.3.7.)
6.3.3 SONGS 2 & 3 UFSAR (Section 8.3.1.1.3.13)"
6.3.4 DBD SC23-120 - 6.9 KV, 4.16 KV & 480 V Electrical Systems.
6.3,5 DBD-S023-TR-EQ - Environmental Qualification Topical Report 6.3.6 DBD-S023-140 - Class 1E 125 Vdc System 6.3.7 SCE Slandard JS-123-103C - Instrument Setpoint/Loop Accuracy Calculation Methodology 6.3.8 Surveillance Test Procedures for Loss of Voltage (LOVS), Degraded Voltage (SDVS, DGVSS) and Sequencing Relays and Circuits S02-11-11.1A - S.R. Unit 2 ESF Train A S02-l-1 1.1A S.R. Unit 2 ESF Train A S02-1-l1l.1B - S.R. Unit 2 ESF Train B S02-0-111.1 B S.R. Unit 2 ESF Train B S03--11-11,A - S.R. Unit 3 ESFTrainA SCE 26-426 Rev. 3 lRdfereace: SO 123-XXIV-7.1 I E4C-130
E&TS DEPARTMENT PRELIM. CON NO.
CALCULATION SHEET Project or ECP: SONGS 2 & 3 Calc No, E4C-130 Suhiect: TLU Calc for Undervoltage Relay Circuits al Class 1E 4 KV Switchaear Sheet o of C. B. \Nhhie 5/16/2005 Joshua Pak 15,81.20051 1 C. B. Whjille 5/24/20051 Joshua Park I5/24/2005t S03-11-11.1A S.R. Unit 3 ESF Train A S03-11-111B - S.R. Unit 3 ESF Train B S03-11-11.1B S.R. Unit 3 ESF Train B 6.4 Drawings.
6.4.1 Elementary Drawings Unit 2 ' Unit 3 No. Drawing No. I Revision A 30220 sh 1 2A04 Bus Metering 32220 sh 1 L3A04 Bus Metering B 30220 sh 2 2A04 Bus Degraded 32220 sh 2 3A04 Bus Degraded
_Voltage Detection _ Vollage Detection C 30230 sh 1 2A06 Bus Metering 32230 sh 1 "3A06 Bus Metering D 30230 sh 2 2A06 Bus Degraded 32230 sh 2 3A06 Bus Degraded
_ _ Voltage Detection Voltage Detection 31468 Synchronizing Potentials SAME I I DWG.
6.5 Vendor documents 6.5.1 SO23-302-2-51 8 - Instruction Book for ABB Type 27N High Accuracy Relay 6.5.2 S023-302-2-512 - Type Test Certificate for ABS 27N Relay 6.5.3 4160 Vac Switchgear Bill of Materials ITE Imperial Corporation 6.5.3.1 S023-302-2-84 6.5.3.2 S023-302-2-85 6.5.3.3 S023-302-2-86 6.5.314 S023-302-2-87 6.5.4 CPD-302-3-35 Sheet C - Instructions Type CV Voltage Relay 6.5.5 S023-302-2-353 - Indoor Metal-Clad Switchgear 6.5.6 1814-AR286-M0008 - ABB Type SVF, SVF-1, SVF-3, SVF-31 Relays 6.5.7 SO123-306-6 Volume I Digital Fault Recorder for Southern California Edison 6.5.8 1814-AU519-M0003 - Agilent (HP) 3458A Multimeter Specifications 6.6 Miscellaneous 6.6.1 Action Request AR050301091-65 6.6.2 SONGS Licensee Event Report No. 2005-003.
SCE26-426 Rev, 3 1Ref-renut: S0123-XXIV-7.151 E4C-130
E&TS DEPARTMENT PRELIM. CCN NO.
CALCULATION SHEET Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLU Calc for Undervoltage Relay Circuits at Class 1 E 4 KV Switchgear Sheet of pEV ORIGINATOR iDATE 'IRE (DATE I REV ORIGINATOR (DATE IRE I DATE =
2 0 C. B. Whittle i5/!612005 Joshua Park 5116/ 005 1 C. B. Whittle 512412005 Joshua Park 5/2412005 5.6.3 MOs for 3A0420-1270-1, 2, 3, &4 relay test Relay ID MO number 3A0420-12701 05071762 06011425 3A0420-127D2 05071763 06011426 3AO420-12703 05071764 06011427 3A0420-127D4 05071765 06011428 I-SCE 26-426 Rev. 3 (
Reference:
SOJ 23-XXIV-7.15]
E&-S DEPARTMENT I PRELIM. CCN NO.
CALCULATION SHEET Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLU Caitc or Undervoltace Relay Circuits at Class 1E 4 KV Switchgear Sheet of REV ORIGINATOR DATE DA-E REVVRE ORMGINATOR DATE MRE DATE C.B. Whittle 5/16f2005 Joshua Park 5/16/2005, _
1 C. B-Whil 15/24/2005 Joshua Park 5/24/20051 7 NOMENCLATURE The following are in addition to the nomenclature of JS-123-103C (Reference 6.3.7)
AR Action Request ABB Asee Brown Boveri CCN Calculation Change Notice DAQ Data Acquisition System Dead Band Voltage difference between the dropout and pickup DGV Degraded Grid Voltage DGVSS Degraded Grid Voltage Signal with SIAS DO Dropout EC Editorial Correction EDG Emergency Diesel Generator ESF Engineered Safely feature kV Kilovolt LOVS Loss of Voltage Signal LSB Least Significant Bit MFR Manufacturer ms Milliseconds N/A Not Available or Not Applicable NCR Non Conformance Report NSP Nominal Setpoirt (SP)
NRC Nuclear Regulatory Commission PT Potential Transformer/Vollage Transformer PU Pickup SCE 26-426 Rev. 3 JReferencc: SO 123-XXIV-7, 5]
E&TS DEPARTMENT PRELIM. CCN NO.
CALCULATION SHEET Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLU Cab for Undervoltage Relay Circuits at Class 1E 4 KV Swilchgear Sheet ____ of REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE C. B. Whittle 5/161/2O05 Joshua Park 5/16/20051 1 C. B. Whittle 5/24/2005 Joshua Park 5/24/2005 SDVS Sustained Degraded Voltage Signal SIAS Safety Injection Actuation Signal SP Setpoint SRSS Square Root Sum of the Squares SWGR Switchgear SWYD Switchyard TCN Technical Change Notice Tol. Tolerance TLU Total Loop Uncertainty TS Technical Specifications UFSAR Updated Final Safety Analysis Report VA Volt Ampere VL-L Line to Line Voltage VL.N Line to Neutral Voltage VT Voltage Tap Setting X Reactance SCE 26-426 Rev. 3 1Referencc: SO 123-XXIV-7.i5]
E&TS DEPARTMENT I PRELIM. CON NO.
CALCULATION SHEET Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLU Cale for Undervoltage Relay Circuits at Class 1E 4 KV Switchgear Shee! of ORIGINATOR "V DATE I RE DATE PEV ORIGINATOR DATEj I DATE 0 C. B. Whittle 5116/2005 Joshua Park 5116/2005 1 C. B3.whittle 5124/2005 Joshua Park 5/24/2005 z 8 CALCULATIONS 8.1 Calculation of Primary Element Allowance (PEA) 8.1.1 Calculation of the PT Burden The total burden on each PT is the sum of the parallel burdens across its lerminals which are phases A-B for one PT and B-C for the other. There are two circuits per each 4 kV bus. Each corresponding bus is loaded with identical loads. For example, referring to Table 4.9.2, for circuit 1, the phase A-B Burden is:
BAs = BTDv + B 12709 + B 127 Fý + B+27R2 Where (from table 4.9. 1):
=.2 + j0 VA B127D3 = 0.5 +j 0 VA B127FB = 0.7 + j 2.3 VA B127R3 = 15.15 +j 7.72 VA Sum - BAS = 16.55+10.02VA= 19.35-/31.2-The other burdens are calculated in a similar manner along with the average, minimum and maximum burdens at++/-10 % difference from the average (per Assumption 3.1.12). Note that the Synchrcscope burden is not considered per Assumption 3.1.14.
Table 8.1.1 Calculated Burden Calculated Burden Difference From the Average PT Transformer R .÷ jX (VA) Z (VA) L Angle (%)
Undervoltage Circuit 1 Ba-b 16;55 +j 10.02 19.35 Z 31.2 -0.16 Undervoltage Circuit 1 16.35 + j 10,02 19.18 Z 31.5 +0.72 5 b-c Utndervoltage Circu)t 2 16.83 +j 10,02 19.58 Z 30.8 -1.4 Ba-b Undervoltage Circuit 2 B b-c 16.35 4-j 10.02 19.18/ 31Z5 +0.72 Average PT Burden 16.52 + j 10.02 19.32 Z 31.2 N/A Minimum 3,1.12 per(-10 Assumption
%) 14.87 9-Dj9.2 17.39 Z 31.2 -1.93 (-10%)
Maximum per Assumption 3.1.12 (+10 %) 18.17 +j 11.02 21.25 Z 31.2 +1.93 (410%)
Therefore, per Assumption 3.1.12 the PT burden for all PT's will be 19.32 Z 31.20 (t 10%).
SCE 26.426 Rev. 3 lRefercncm: SO 23-XXIV-7.151 E4C-130
E&TS DEPARTMENT CALCULATION SHEET Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLU Calc for Undervoltage Relay Circuits at Class 1E 4 KV Switchqear Sheet __ of REV ORIGINATOR DATE IRE DATE R=-VI ORIGINATOR DATE IRE DATE o C. B. Whittle 5/16/2005 Joshua Park 5(16/2005 I -
1 C. B. WhIttle 5/24/2005 Joshua Park 5124/2005 B.1.2 Calculation of the PT Ratio Correction Factor and Accuracy As determined in Section 5.1.2, Equation 5-1 provides the RCF for the transformer for a given burden, with measured values of the true ratio and phase angle at zero burden, and one other burden. Manufacturer tag data from Attachment 9.1, along with the calculated burden for the transformer is used to find the applicable RCF, and thus the accuracy of the potential transformer voltage. (Note that the angles are all in radians.)
Equation 5-1 RCT fo= Rc n i a ea(RmCl f ROFCacion ° ,-o,)+for th, v PT Budn The following is an example of RCF Calculation for the average PT Burden:
RCF,. = 0.9974 + 9 32 ]
. ] x...
[(I ,0019 - 0.9974 )x cos( 0.5548 - 0.5445 ) + -
(- 0.000582 - 0.000291 )x sin( 0.5548 - 0.5445 )=0.9985568 e*=cos~'(.85) = 0.5548 radians (Section 4.3, Y Burden)
=31.2'~ (Table 8.1.1)
= 0.5445 radians RCFo = 0.9974 (Section 4.3, No Burden)
RCFt = 1.0019 (Section 4.3, Y Burden)
B= 19.32 VA (Table 8.1.1)
B1 = 75 VA (Section 4.3, Y Burden)
%=y+1 minute = 0.000291 radians (Section 4.3, No Burden) yi -2 minutes = -0.000582 radians (Section 4.3, Y Burden)
ROF values were similarly calculated for the minimum and maximum burdens (as calculated in the previous section). The results, including percent error from the average RCF, are summarized in the following table:
KV.:-) J~tcrerncc: 3U I A-XXI V-1. i)
NUD4.)4ZU E4C-130
ICCN NO,/ A47480 -
E&TS DEPARTMENT PRELIM. CCN NO. Pane 31 nf ,37 CALCULATIUN 5M1h ] CCNCONVERSION:
CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLU Calc for Undervoltaqe Relay Circuits at Class 1 E 4 KV Switchgear Sheet - of V I NATOR DA E DATE REV ORIGINATOR DATE IRE DATE C. B. Whitll. 5/16/2005 Joshua Park 5i1`t2005f 1 C. B. Whittle 15124/2005 Joshua Park ]5/2412005 Table 8.1.2
.... RCF Parceni Err'or from the Calculated Burden Calculated RCF Perce Average Average PT Burden 19.32 Z 31.2' 0.99856 N/A Minimum per Assumption 3.1.12 17.39 Z 31.20 0.99844 -0.D12 %
l-1C% burden)
Maximum per Assumption .. 0..
3.1.12 (+10% burden) 21.25 Z 31. 2 0.99867 +0.012%
Therefore, the RCF to be used in the calculation of the setpoint is:
RCF = 0.99856 From Table 8.1.2, the error in the RCF due to a 10% burden uncertainty is -L0.012 %.
This uncertainty will be applied as a bias:
PEABUd = +/-0.012%
Assumption 3.1.9 specifies an additional independent, random error of 0.05% will be applied to the PT. Therefore:
PEApT = +/-0.05%
8.1.3 Voltage Drop from the PT to the UV Relay (PEAv1).
Per Assumption 3.1.15 a bias will be applied to the accuracy to account for the voltage drop from the PT to the UV Relay of -0.02 Vac maximum drop and 0 Vac minimum drop, Converting to percent:
-PEAvD = - 0.02/118*100 = -0.017%
Theref ore:
-PEAVD =-0.017% (Bias) and 4-PEAvD = 0 % (Bias) 8.2 Calculation of Undervoltage Relay Total Loop Uncertainty (TLU) 8.2.1 Individual Uncertainties associated with Undervoltage Relay TLU 8.2.1.1 Primary Element Allowance (PEA) (as determined In Section 8.1 above).
PEAvo = +0%/-0.017% (Bias)
PEAPT = +/-0.05% (SRSS)
SCE 26-426 Rev. 3 1
Reference:
S0 123-XXIV-7,l5)
E&TS DEPARTMENT PRELIM. CCN NO.
CALCULATION SHEET Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLU Calp for Undervolta-ge Relay Circuits at Class 1 E 4 KV Switchgear Sheet of REV ORIGINATOR IDATE IRE DATE IREV IORIGINATOR DATE IRE DATE 0 C. B. Whittle 15/1612005 Joshua Park 5/16/2005 J C. B. Whittle t5/24/2005 Joshua Park 5/24/2005 PEABr*d +/-0.012 % (Bias) 8.2.1.2 Device Tolerances 8.2.1.2.1 Drift Allowance (D)
Per Assumption 3.2.2 the drift allowance for the Undervoltage Relay is:
D = "0.45%
8.2.1.2.2 Power Supply Allowance (PSe)
Per design input Section 4.6 the DC power supply to the Undervoltage Relay varies no more than 103 to 140 Vdc under all operational conditions. The manufacturer's stated accuracy for allowable dc control power range from 100 to 140 Vdc is +/-0.1% (Section 4.2). Therefore, the relay is operating within the man ufacturer's allowable range and PSe is:
PSe = +/-0.1%
Allowance for % per volt
+/-0.1% / (140 - 100) V = +/-0.0025%/volt
.0.0025% x 7 V/ volt = +/-0.0175% for 7 volts change 8.2.1.2.3 Temperature Allowance (Te) (normal &accident)
The range of temperature operation for the ESF SWGR room vary from a low of 55 OF during normal conditions to a high of 95 OF during accident conditions (Section 4.4). This temperature range is bounding for normal conditions. Per Assumption 3.1.13 the relays will experience this same temperature difference. Therefore:
AT=95-55=40 F° The manufacturers slated temperature effect is +/- 0.4 % for a temperature range of 10 to 40 5C. Therefore, the temperature effect is:
+/-0.4 / (40-10)
- 5/9 = +/-0.00741 %/F*
Then, the temperature effect (Te) is:
Te = +/-0.00741 40 = +/-0.297 %
+/-0.00741 %/F' x 14.8 F.0 +/-0.11% for 14.8' F temperature change SCE 26-426 Rev. 3 l
Reference:
S0123-XXIV.7.15)
E&TS DEPARTMENT I PRELIM. CCN NO.
CALCULATION SHEET Project or ECP: SONGS 2 & 3 Calc No. E4C-130 Subjec: TLU Calc for Undervoltace Relay Circuits at Class 1 E 4 KV Switchrjear Sheet of REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0 C.V. Whittle 5/16120O51 Joshua Park 5/16/2005 t,-
1 C. B. Whittle 15124120065 Joshua Park 5/24/2005 8.2.1.2.4 Seismic Effect (Se)
Per Assumption 3.1.7 Seismic eflect is negligible. Therefore, Se = 0 8.2.1.2.5 Radiation Effect (Re)
Per Assumption 3.1.6 the Radiation effect is negligible. Therefore, Re= 0 8.2.1.3 M&TE Tolerance (M0TE)
See section 4.5 and Assumption 3.1.3 for information regarding accuracy, ranges and conditions of use. Since the M&TE has an auto-range feature (switching to the 1
1000 Vac range at 120 Vac), the M&TE Tolerance is calculated for both the 100 Vac and 1000 Vac range, however only the larger uncertainty (1000 Vac range) is used in the TLUJ calculation. Note that these calculations are based on the 118 Vac point of interest as discussed in Assumption 3.1.1.
8.2.1.3.1 M&TE Accuracy (MTEA)
The accuracy for the 10Vac range (120 Vac maximum reading) at 40Hz to 1 kHz in the Synchronous mode is:
MTEA120 = +/-(0.02% of reading - 0.002 % Range)
= +/-(0.02% + 0.002% 120/118)
= +0.023 %
The accuracy for the 1000Vac range at 40Hz to 1kHz in the Synchronous mode is:
MTEAk = +/-(0.04% of reading + 0.002 % Range)
= +/-(0.04% + 0.002% 1000/118)
= +_0057 %
8.2.1.3.2 ,Readability (R) (least significant digit for digital M&TE)
R120 = _+0.00001 Vac
= +/-0.00001 Vac/1 18 Vac 100 = +/-0.00001%
=0 (per Assumption 3.1.11)
Rik = +0.0001 Vac
=++/-0.0001 Vac/118 Vac* 100 = +0.0001%
0 (per Assumption 3.1.11) 8.2.1.3.3 M&TE temperature effect (MTETe)
Temperature Coefficient for reading outside of +/- 1.8 F0 (+/- 1 C') of the last ACAL is +/-(0.001% of reading + 0.0001 % Range)/C' therefore, based on SCE 26-426 Rev. 3 iRdfereace: SOI 23-XXIV-7.151 E4C-130
ICCN'NO./ A47480 E&TS DEPARTMENT PRELIM. OCN NO. NO. IPrP 3ý4 Of 3347 Pane qo CALCULATION SHEET CCN CONVERSIONi CCN NO. CCN 7 Project or ECP: SONGS 2 & 3 Calc No. E4C-130 Subiect: TLU Calc for Undervoltaae Relay Circuits at Class 1E 4 KV Switchqear Sheet of REV IORIGINJATOR IDATE j ;i IRE DATE IREV ORIGINATOR I DATE IRE DATE 0 C. B. Whittle S1S6/2005 Joshua Park 516/2005 "
SC.8. Whittle 5/24/2005 JOshua Park 5/24/2005 Assumption 3.1.3 of a calibration temperature range of +/- 9 F- (+/- 5 C')
and converting to F' from C':
MTETrl 2 o =:'(0.001 + 0.0001
- 120/118)* 5W9' 9 % = +/-0.006 %
MTE1T1 k = -:(0.001 + 0.0001 1000/118)* 5/9* 9 % +/-0.010%
B.2.1.3.4 M&TE Reference Standards (MTE 5s)
The reference standard accuracy is assumed to be 25% of the M&TE accuracy per JS-123-103C (Reference 6.3.7). Therefore:
MTEesi 2o = 0.023 % 0.25 +/-0.006
+/- %
MTERSlk = 0.057 % '0.25 '-0.015 %
8.2.1.3.5 Total M&TE Tolerance The total M&TE allowance is the SRSS of the four components determined above. That is:
MTE + (MTEA2- R2 + MTETe2 + MTERs 2) 2 MTE 121 = + (0.023' + 0'.+ 0.0062 + 0.0062)112 MTE1 20 = + 0.025%
MTEl, 4 (0.0572 + 02 + 0.01 02 + 0.0152)1/2 MTElk + 0.060%
Therefore, applying the greater (1kV range) allowance:
MTE = +/- 0.060%
8.2.1.4 Setting Tolerance (ST)
Per Assumption 3.1.2 the setting tolerance is +0.05 Vac, therefore:
ST = +/-0.05/11 8*100 = +/-0.042%
B.2.1.5 Miscellaneous Allowance (Ma)
Per Assumption 3.1.10 the miscellaneous allowance is:
Ma = +/-0.1 %
8.2.2 Combination of Uncertainties Combining the uncertainties per the equation from Section 5.2.2, the TLU is:
TLU=+/- +Te2 +RD2 +PSe +Se 2
++Re2 MTE2 -ST 2'iMa 2
+ PEA,.
7 +/- PEABURD +/- PEAv, SCE 26-426 Rev. 3 l
Reference:
E&TS DEPARTMENT PRELIM. CCN NO.
CALCULATION SHEET Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLU Calc for Undervoltage Relay Circuits at Class 1E 4 KV Switchgear Shee_ of REV ORIGINATOR DATE! IRE DATE REV ORIGINATOR* DATE I RE DATE IC.B. Whittle 5/1 /2005 Joshua Park 5/1/2005 C. B. Whittle ,5/24/2005 Joshua Park 5/24/2005
-PEAvD =-0.017%
+PEAvD =0%
PEAuFD = _+/-0.012%
PEAPT = +/-0.05%
Te = i-0.297%
O = +/-0.45%
PSe = +/-0.1%
Se = N/A Re = N/A MTe = +/-0.060%
ST = +/-0.042%
Ma = +0.1%
2 2 2 2 2 2 2 2'ko
+TLU =+(0.297 2 + 0.45 + 0.12 +0 +0 +0.060 + 0,0422 + 0.12 + 0.052) + 0.012 + 0 %/ =+0.5764%
- TLU -(0.2972 + 0.452 + 0.12 + 02+ 0' + 0,060' + 0.042' + 0.12+ 0.05'2) - 0,012 - 0.017% = -0,5934%
TLU = +/- 0.5934%
= +/- 0.5934% x 118 V = " 0.7002 Vac at the UV Relay = approx. +/- 0.70 V ac 8.3 Calculation of Undervollage Relay Allowable Value Tolerance (AVT)
The allowable value allowable values during surveillance test (relay only)
AVT = ( D-+ ST2 +R2 11 )
ST = Setting Tolerance: +/-0.042%.
D = Drift: +/-0.45%
R = Readability of M&TE: +/-0.00001/118 Vac
+/-0.00001% ,- 0 (Negligible per Assumption 3.1.11)
Therefore, the Tolerance for allowable value is:
AVT = 2(0.0422 + 0,452 + 02)',2 % = +0.452% OR
= +/-0.452% x 118 V = _+/-0.53335 Vac at the UV Relay = approx, +/- 0.53 V ac Therefore, an AVT of +/-0.53 Vac at the UV Relay is selected.
SCE 26-426 Rcy, 3 iRdercnce; SOM23-XXIV-7.15]
E&TS DEPARTMENT PRELIM.
ICCN NO.ICON NO, A47480 Pane 36 of 37 CALCULATION SHEET CCN CONVERSION:
CCN NO. CCN Projector ECP: SONGS 2 &3 Calc No. E4C-130 Sublect: TLU Calc for Undervoltage Relay Circuits at Class 1E 4 KV Switchqear Sheet - of REV ORIG;N'ATDR IDATE IRE DATE [,REV OR)GINATlOR JDATE IRE DATE SC. B. Whittle 15&16/2015 Joshua Park 5/16/2005 C. B. Whittle 1.5124/20051 Joshua Park 5,1242005 8.4 Calculalion of Undervollage Relay PU and DO Setpoints 8.4.1 Undervoltage Relay Nominal Pickup (PU) Setpoint (SPpu)
The relay nominal pickup setpoint is selected as 4134.5 Vac. This value has been determined taking into account the relay TLU, the upper and lower analysis limits and the design margins.
SPpu = 4134.5 Vac
= 4134.5 / (35
- 0.99856) = 118.30 Vac at the UV Relay 8.4.2 Undervollage Relay Nominal Dropout (DO) Setpoint (SP 0o)
SPODo SPpu - DB 118.30 - 0.2 = 118.10 Vac atthe UV Relay
=11B.10 * (35
- 0.29856) = 4127.5 Vac atthe 4 kV Bus 8.5 Calculation of Undervollage Relay PU and DO As-Found/As-Left Acceptance Bands 8.5.1 Calculation of Undervoltage Relay As-Found Acceptance Band The As-Found Acceptance band will be the relay pickup or dropout setpoint +AVT (allowable value).
As-Found Band for Pickup = 118.30 + 0.53 Vac
= 117.77 to 118.83 Vac at the UV Relay OR
= 4116.0 Io 4153.1 at the 4 kV Bus As-Found Band for Dropout = 118.10 +/- 0.53 Vac
= 117.57 to 118.63 Vac at the UV Relay OR
= 4109.0 to 4146.1 at the 4 kV Bus 8.5.2 Calculation of Undervoltage Relay As-Left Acceptance Band The As-Left Acceptance band will be the trip or reset setpoint +/-ST (setting tolerance).
As-Left Band for Dropout = 118,10 +/- 0.05.Vac = 118.05 to 118.15 Vac As-Left Band for Pickup = 118.30 +/-0.05 Vac = 118.25 to 116.35 Vac 8.6 Calculation of Minimum and Maximum Relay DO and PU at the 4kV Level The Minimum and Maximum Relay DO and PU Values are calculated by applying the TLU to the nominal setpoint. Results are rounded conservatively (up for maximum, down for minimum).
Maximum PU = (118.30 + 0.70) = 119.0 Vac at the UV Relay OR
= (118.30 + 0.70)*(35
E&TS DEPARTMENT I PRELIM. CCN NO.
CALCULATION SHEET Project or ECP: SONGS 2 & 3 Cab No E4C-130
Subject:
TLU Calc for Undervoltaqe Relay Circuits at Class 1E 4 KV Switchgear Sheet of REV ORIGINATOR I DATE IRE DATE' REV ORIGINATOR DATE IRE DATE 0 C. S. Whittle 5/16/2005 Joshua Park 5/16/2005
- 1 C. B. Whittle 5/24/2005 Joshua Park, 5/24/2005 Maximum DO (118,10 + 0.70) = 118.80 Vac at the UV Relay OR
= (118.10 + 0.70)*(35
= (118.30 - 0.70)'(35' 0,99856) = 4110,1 Vac at the 4kV Level Minimum DO = (118.10 - 0.70) = 117.40 Vac at the UV Relay OR
= (118.10 - 0.70)y(35 0.99856) = 4103.1 Vac at the 4kV Level 8.7 Determination ol Design Margins Mu = ALu - SPPU.MAX
= 4161 -4159.0
= 2.0 Vac at 4 kV Bus ML = SPDO-MIN - ALL
= 4103.1 - 4100
= 3.1 Vac at 4 kV Bus SCE.26-426 Rev. 3~ ¶Rdmritn: SUI LPXXIV7.151 E4C-130
Attachment 2 to Enclosure I Calculation E4C-090 ECN A44810 Auxiliary System Voltage Regulation Page 1
Soutnern California Edison Company . PAGE TOTAL NO.
ENINEERING CHANGE CALC NO. ECN NO./ A44810 OF PAGES NOTICE (ECN)/CALCULATION E4C-090 PRELIM CCN NO. 1 4 5-z-/
CHANGE NOTICE (CCN) BASE CALO. REV.
UNIT CCN CONVERSION: CALC.
COVER PAGE 2
- REV.
SUMMARY
CHANGE 4 3 CON NO. CCN-ONO [IYES I ___
CALCULATION
SUBJECT:
Auxiliary Syatemi Voltage Regulation CALCULATION CROSS-INDEX ENGINEERING SYSTEM NUMBER/PRIMARY STATION SYSTEM 0-CLASS 0 New/Updated Index Included DESIGNATOR 1804/PBA,PBB II
] Existing Index is Complete CONTROLLED PROGRAM OR I PROGRAM/DATABASE NAME(S) I VERSION/RELEASE NO.(S)
Site Programs I Procedure Impact? DATABASE ACCORDING TO C ALSO, LISTED BELOW 0 NO [] YES, AR No. SO123-XXIV-5.1 1I0FR50.59 / 72.48 Review: 0 PROGRAM E] DATABASE ETAP 5.0,0N AR No, 060601441-8
- 1. BRIEF DESCRIPTION OF ECN/CCN:
Purpose This ECN performs analyses to determine the analytical lower voltage limit at Class 1E 4.16KV buses based on the revised cables between Class 1E 480V Loadcenter 2B04 and Class 1E 480V MCC 2BD (Refer to ECP 060401140-95). This ECN also supports ECP 060601441-5 which will change the Degraded Grid Voltage Signal (DGVS) relay pickup/dropout setting based on the revised analytical lower voltage limit.
Acceptance Criteria The minimum required steady-state voltage for motor terminals is 90% of rated voltage.
Results The results indicate that with 4100V at the 4.16kV buses, all moto-rs will have a terminal voltage at 90%
or greater, and will meet the criterion for minimum motor terminal voltage. Therefore, 4100V can be defined as the new analytical lower voltage limit at Class 1E 4.16KV buses.
Actual DGVS relay pickup/dropout settings will be determined based on this revised analytical lower limit of 4100V (Reference Calculation E4C-130).
(continued on page 3)
INITIATING DOCUMENT (ECP, OTHER) ECP # 060601441-5 Rev. 0
- 2. OTHER AFFECTED DOCUMENTS;
[] YES 0 NO OTHER AFFECTED DOCUMENTS EXIST AND ARE IDENTIFIED ON ATTACHED FORM 26-503.
- 3. APPROVED BY: ESC:,]
Ashok Patel ORIGINATOR (Print name/sign/date)
'j !
FLS (Signaiure/date) h,*-~
VjK Approval requires P5 T3EV64 Qualification Venified: Approval requires POS T3EN64 Qualification Verified: .
Joon K / l ., - npal Initial IRE (Print name/sign/date)
Approval requires PQS T3EN64 QualificationVerfied:
REFERENCE:
S0123-XXIV-7.15] E4C-09OA44810.doc SITE FILE COPY Site File Copy E4C-090
Attachment 3 to Enclosure 1 SCE Test Procedure S02(3) -I1-11.1A(B)-2 Surveillance Requirement Unit 2(3) ESF Train A(B)
Channel (Online) Test of Loss Of Voltage (LOVS), Degraded Voltage (SDVS, DGVSS) and Sequencing Relays and Circuits Section 6.4, pages 18 through 26 (Unit 2 Train A provided, other unit and trains similar)
NUCLEAR ORGANIZATION TEST PROCEDURE SO2-1 -11 .1 A-2 UNIT 2 REVISION 4 PAGE I 8 OF 247 TON 4-3 Check (/)
Complete 6.4 LOVS Channel 1 - Degraded Voltage Detection Relay - 127D1 (ABB 27N)
NOTES: 1. The following tests of the 127D1 (ABB 27N) relay supersede all test requirements of S0123-Il-11.80 (when issued)except Initial Test on replacement relays. (Ref.
1814-AJB65-M0035 (MFR IB 7.4.1.7-7))
2.- Use only Agilent (HP) 3458A, or equivalent, for calibration cd 127D1 (ABB27N) relay. See Special Tools, Attachment 3.
As Found Tests 6.4.1 Set up test equipment for testing the 127D1 (ABB 27N) relay in a temperature controlled 'oven'.
.1 Set the 'oven' temperature to 75 *F.
.2 Place relay test case in the 'oven.'
.3 Connect M&TE (external to the 'oven') to provide a power supply (125 VDC nominal), Signal input (120 VAC nominal), contact monitor and 'oven' temperature monitor.
.4 Allow the Agilent 3458A meter 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> to warm up, prior to initiating test.
Power ON Time Test Start Time
.5 Reset the Agilent meter to establish initial status.
.5.1 Press [Blue], then press [RESET]
.6 Perform a Self-Test of the meter. Press [Blue], then [TEST]
.6,1 Meter should display "SELF TEST PASSED" when completed,
.7 Select ACV Function.
/
.8 Select 100 V Range (using [Up] and [Down] keys).
S02-11-11I A-2
NUCLEAR ORGANIZATION TEST PROCEDURE S02-11-11.1A-2 UNIT2 REVISION 4 PAGE 19 OF 247 TON 4-3 Check:(/)
Complete 6.4.1 .9 Set Mode to ACV Synchronous by pressing the following key sequence:
.9.1 [Blue]
.9.2 [S]
.9.3 [Down] (three times). Display should read, "SET ACV'.
.9.4 [Rightl
.9.5 [Up] Display should read "SETACV SYNC".
.9.6 [ENTER]
.10 Verify the meter's mode by pressing the [Right] key and confirm that "SETACV SYNC" is displayed.
.10.1 Press the [Left] key to return to the measurement display,
.11 Prior to testing the relay, perform an auto-calibration of the Agilent 345BA:
.11.1 Remove all inputs
.11.2 Press the [Auto Call button
.11.3, Press the [Down] key 4 times, until the display reads "ACAL ALL"
.11.4 Press 'ENTER". (Auto-calibratfon will take approximately 15 minutes.)
.11.5 Calibration satisfactory.
6.4.2 Install the relay to be tested into the test case in the 'oven.'
6.4.3 Energize the power supply to the relay at 125 (+/- 0.1) VDC 6.4.4 Energize the signal source to the relay at 120 VAC.
S02-11-12 . 1A-2
NUCLEAR ORGANIZATION TEST PROCEDURE S02-11-11.1A-2 UNIT 2 REVISION 4 PAGE 20 OF 247 TCN 4-3 Check,(/)
Complete 6.4.5 Ensure relay target is reset.
6.4.6 Close the 'oven' door and allow the internal temperature to stabilize at 75 °F (Reor Te).
.1 Record 'oven' temperature in the Data Table at step 6.4.16.8, page 22.
6,4.7 Record room temperature in the Data Table at step 6.4,16.8, page 22.
Room temperature SHOULD be within 55 - 81.7 OF prior to beginning the test.
I TIS REQUIREMENT 6.4.8 Check 127D1 (ABB 27N) relay pickup voltage. Acceptance Criteria is 118.07 to 118.58 Volts. Enter As-Foundvalue in the DataTable at step 6.4.16.8, page 22.
TIS REQUIREMENT 6.4.9. Check 127D1 (ABB 27N) relay dropout voltage. Acceptance Criteria is 117.97 to 118.49 Volts. Enter As-Found value in the Data Table at step 6.4.16.8, page 22.
6.4.10 Repeat steps 6.4,8 and 6.4.9 two more times. Record values in the Data Table at step 6.4.16.8, page 22.
6.4.11 Record 'oven' temperature in the Data Table at step 6.4.16.8, page 22, j Calculate the temperature change, if any, and enter differential in the table. If differential exceeds 1 OF, repeat the As-Found tests 6.4.7 through 6.4.12.
6.4,12 Record room temperature in the Date Table at step 6.4.16.8, page 22, j Calculate the temperature change, it any, and enter differential in the table. If differential exceeds 9°F, perform an AC auto-calibration of the Agilent 0458A and repeat the As-Found tests 6.4.7 throuigh 6.4.12.
TIS REQUIREMENT 6.4.13 Check the operating time of the relay at 125 to 0 Volts. Acceptance Criteria Is 1.83 to 2.17 Seconds. Record As-Found operating time in the Data Table at step 6.4.16.8, page 22. 1 6.4.14 . De-energize the relay being tested and remove it from the 'oven.' -
sD2-11-11. IA-2
NUCLEAR ORGANIZATION TEST PROCEDURE S02-l-1 1.1A-2 UNIT 2 REVISION 4 PAGE 21 OF 247 TCN 4-3 Check (/)
Complete Do NOT attempt to manually operate target vanes on the relay. The targets can be damaged by manual operation with a pencil or pointed object.
6.4.15 Verify relay target operated. Enter verification in the Data Table at step 6.4.16.8, page 22. I NOTES: 1. Relay rebuilding is NOT intended ior this section. Report all major deficiencies to the responsible Test Supervisor.
- 2. Repair or replace terminations, as necessary, per Procedure S0123-1-4.59.1 or S0123-I-4.59.3.
- 3. Record all corrective actions in the Work Done Section ol the MO.
- 4. Section 6.4.16 may be performed in any logical sequence.
6.4.16 Perform an electrical and mechanical inspection on relay to verify and correct as necessary, the following:
.1 All electrical terminals are tight. Tighten as necessary.
.2 All wire lugs are properly applied per S0123-1-4.59 and wire strands are intact. Reterminate per S0123-1-4.59.1, if necessary.
.3 All screws and nuts are firmly secured. Tighten as necessary.
.4 All internal parts of relay case are aligned properly, firmly secured, and free of dirt or metal filings. Adjust, tighten, and clean as needed.
.5 All parts are free of cracks. Consult with supervisor if parts are damaged. Record all damage on MO.
.6 All electronic components are soldered properly, free of evidence of overheating, free of leakage or swelling (capacitors)and free of cracks (reslstorsand P.C. boards). Rework connections per SO123-1-4.59.3.
.7 Record relay model, serial number /dale code, If presenL Model s/n: date code:
S02 12 . 1A-2
NUCLEAR ORGANIZATION TEST PROCEDURE S024-11-t1AA-2 UNIT 2 REVISION 4 PAGE 22 OF 247 TCN 4-3 Check (V')
Complete 6.4.16.8 Enter verification of inspection in the Data Table below.
LOVS Channel 1 Degraded Voltage Detection - As-Found Pickup Dropout Operating Time Target P/U Mech. Performed Relay ID Voltage Voltage 125 V4OV Trip (6.4.15) By Initials (6A4.8) (6,4.9) Time (6.4.13) (6.4.16.8)
[ V- V se I[ I I 127D1 Acriepian 11B.07 118.507 tot 1117.97 118.49V Crtra 11 8.5B V 118.49 VIII to t 1.83 to 2.17 Sec Check Satl Check Sat ___
Pickup Dropout Performed Relay ID Voltage Voltage
" (6.4.10) (6.4.1 0) By Initials 127D1 -Test#2 V V 127D1 -Test#3 V V_
Acceptance Criteria 118.07to 118.58 V 117.97 to 118.49 V Start Temp End Temp Temperature Temperature (OF) (7F) Change (mF) Limit Performed (6.4.6.1 /64.7) (6.4.11 / 6.4.12) By Initials Oven _1I 'F Room _9 < F Room Temperature Acceptance Criteria: 55 to 81.7 OF S02-1I--li. A-2
NUCLEAR ORGANIZATION TEST PROCEDURE S02-l1-1 1.1A-2 UNIT 2 REVISION 4 PAGE 23 OF 247 TCN 4-3 Check (,)
Complete As Left Tests 6.4.17 Set up test equipment for testing the 127D1 (ABB 27N) relay in a temperature controlled 'oven'.
.1 Set the 'oven' temperature to 75 CF.
.2 Place relay test case in the 'oven.'
.3 Connect M&TE (external to the 'oven') to provide a power supply (125 VDC nominal), Signal input (120 VAC nominal), contact monitor and 'oven' temperature monitor.
.4 Allow the Agilent 3458A meter 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> to warm up, prior to initiating test.
Power ON Time Test Start Time
-5 Reset the Agilent meter to establish initial status,
.5.1 Press [Blue], then press [RESET]
.6 Perform a Self-Test of the meter. Press [Blue], then [TEST]
.6.1 Meter should display "SELF TEST PASSED" when completed.
.7 Select ACV Function.
.8 Select 100 V Range (using [Up] and [Down] keys).
.9 Set Mode to ACV Synchronous by pressing the following key sequence:
.9.1 [Blue]
.9.2 [S]
.9.3 [Down] (three times). Display should read, "SET ACV'.
,9.4 [Right]
.9.5 [Up] Display shouqd read "SETACV SYNC".
.9.6 [ENTER]
.10 Verify the meter's mode by pressing the [Right] key and confirm that "SETACV SYNC" is displayed.
.10,1 Press the [Left] key to return to the measurement display.
S02 11A. A-2
NUCLEAR ORGANIZATIDN TEST PROCEDURE S02-11-11.1A-2 UNIT 2 REVISION 4 PAGE 24 OF 247 TCN 4-3 Check (/)
Complete 6.4.17.11 Prior to testing the relay, perform an auto-calibration of the Agilent 3458A:
.11.1 Remove all inputs
.11.2 Press the [Auto Cal] button
.11.3 Press the [Down] key 4 times, until the display reads "ACAL ALL?
.11.4 Press "ENTER". (Auto-calibration wJll take approximately 15 minutes.)
,11.5 Calibration satisfactory.
6.4.18 Install the relay to be tested into the test case in the 'oven.'
6.4.19 Energize the power supply to the relay at 125 (+/- 0.1) VDC 6.4.20 Energize the signal source to the relay at 120 VAC.
6.4.21 Record room temperature in the Data Table at step 6.4.33, page 25.
Room temperature SHOULD be within 55 - 81.7 'F prior to beginning the test.
6.4.22 Check pickup voltage of relay. It should be left within 118.28 to 118.3B VAC. Adjust. R27 as necessary. (CW to increase, CCW to'decreasesetting) 6.4.23 Check dropout voltage of relay. It should be left within 118.18 to 118.28 VAC. Adjust R16 as necessary. (CWto decrease, CCW to increasesetting) 6,4.24 Repeat steps 6.4.22 and 6.4.23 until no further adjustment is required.
6.4-25 With relay's tap plugs set to desired points, check the relay timing to be within 1.98 to 2.02 Seconds for 125 to 0 Volts, Slight adjustment of R41 may be necessary to obtain desired time. (CWto increase, CCWto decrease setting) 6.4.26 Ensure relay target is reset.
6.4.27 Close the 'oven' door and allow the internal temperature to stabilize at 75 F(+ 1 F).
.1 Record 'oven' temperature in the Data Table at step 6.4.33, page 25.
6.4.28 Check pickup voltage of relay. Acceptance Criteria is within 118.28 to 118.38 VAC. Record As-Left pickup voltage in the Data Table at step 6.4.33, page 25.
S02-11-11. 1A-2
NUCLEAR ORGANIZATION TEST PROCEDURE S02-lI-1 1.I A-2
- UNIT 2 REVISION 4 PAGE 25 OF 247 TCN 4-3 Check (,)
Complete 6.4.29 Check dropout voltage of relay. Acceptance Criteria is within 118.18 to 1! 8.28 VAC. Record As-Left dropout voltage in the Data Table at step 6.4.33, page 25.
I 6.4.30 Check the relay timing. Acceptance Criteria is within 1 98 to 2.02 Seconds for 125 to 0 Volis. Record As-Left operating time in the Data Table at step 6.4.33, page 25.
6.4.31 If further adjustment is required, repeat adjustment and re-test from step 6.4.21. I 6.4.32 Record 'oven' temperature in the Data Table at step 6.4.33, page 25.
Calculate the temperature change, if any, and enter differential in the table, If differential exceeds 1 'F, repeat the As-Left tests 6.4.21 through 6.4.33.
6.4.33 Record room temperature in the Data Table at step 6.4.33, page 25.
Calculate the temperature change, if any, and enter differential in the table. If differential exceeds 9'F, perform AC auto-calibration of the Agilent 3458A and repeat the As-Left tests 6.4.21 through 6.4.33, I LOVS Channel 1 Degraded Voltage Detection - As-Left Pickup Dropout . Operating Time Perfored Relay I1 Voltage Voltage 125V 4 OV Trip By Initials (6.4.28) (6.4.29) Time (6.4.30) 127D1 V V Secs Acceptance Criteria 11 8.26V to 18,38V 1618.18V to 118,28V1 1.98 to 2.02 Sec Start Temp End Temp Temperature Performed Temperature (0F)
(8.4.21 / 6.4.27.1)
( F)
(6.4.32 16.4.33)
Change (OF) Limit By Initials I Oven 1 'F I Room s9 'F Room Temperature Acceptance Criteria: 55 to 81.7 7F I 6.4.34 De-energize the relay being tested and remove it from the 'oven.' - I 6A4.35 Upon completion of acceptable relay test/calibration, fill out an OD-45 Relay Data Card and place it on relay 127D1.
S02-11-il . IA-2
NUCLEAR ORGANIZATION TEST PROCEDURE S02-11-11.1A-2
- UNIT 2 REVISION 4 PAGE 26 OF 247 TCN 4-3 Check (,f)
Comprlete 6.4.36 Ifthe relay is new or was replaced during performance of this procedure, record relay model, serial number / date code, if present. If not new Dr replaced, mark this step N/A.
Model s/n: date code:
6.4.37 Degraded Voltage Relay restoration:
Remove all relay test plugs and test leads.
.2 Check that all tap plugs and adjustments are secured and tight,
,3 Re-install relay cover(s) and reset all targets.
Section 6.4 Performed By ([nit)
(Restoration wilt be completed in Section 6.8)
S02-1I-11 . A-2
Attachment 4 to Enclosure 1 Figure D-16 of SCE document DBD-S023-120 Class 1E 4.16 kV Crosstie Breaker Manual/Auto Transfer Closing Logic