ML15020A019

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CNC-1381.05-00-0017, Class 1E Diesel Protective Relaying and Sequencer Undervoltage Relay Settings
ML15020A019
Person / Time
Site: Catawba  Duke Energy icon.png
Issue date: 04/01/2014
From:
Duke Energy Carolinas
To:
Office of Nuclear Reactor Regulation
Shared Package
ML15020A015 List:
References
CNS-15-002 CNC-1 381.05-00-0017
Download: ML15020A019 (44)
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Text

ATTACHMENT CNC-1 381.05-00-0017, "Class 1E Diesel Protective Relaying and Sequencer Undervoltage Relay Settings"

Form 101.1 (R02-12 CERTIFICATION OF ENGINEERING CALCULATION Station and Unit Number: Catawba Nuclear Station Unit 1 & 2 Revision No.: 17 Title of Calculation: Class 1E Diesel Protective Relaying and Sequencer Undervoltage Relay Settings Calculation Number: CNC--1381.05-00-0017 ACTIVE: Yes [D No [] TYPE 1: Yes r] No I QA CONDITION of items covered: 1 Microfiche Attachment List: Yes I-I No M (See Form 101.4) DSD List: Yes [I No Z (See Form 101.7)

Calculation Body Pages (Vol.) Supporting Documents (Vol.) Volumes Revised Deleted Added Revised Deleted Added Deleted Added

  • . 16.1, 17.1, 18.1, 18a.1, 18b.1, 18c.1, 21.1 The signatures below certify that this calculation has been originated, checked, inspected and approved in accordance with established procedures.

Originated By: ,gfa-rei ,,.-ýtC a .. C e Date:

CheckedBy: ko)ve,* 1A-/

ikr-d keA-) Date:

Verification Method: Method 1 NJ Method 2 EI Method 3 IE Othe r E Approved By: . 14..iv,,l

-1 re /t i'v J/ ,, Date: -y- 2 -/

Issued Received to DCRM: 20-' e. Date: 4 ',4by DCRM: ~~ ~Date:Sjzq Complete the Spaces Below for Documentation of Multiple Originators (Org.) or Checkers (Chk.)

Pages: _ Orig.:_ Date:

Verif. Method li[ 2E] 31 Other[] Chk.: Date:

Pages: Org.:_ Date:

Verif. Method IF] 2[1-] 3[] OtherE] Chk.: Date:

Form 101.1 (R02.12)

CERTIFICATION OF ENGINEERING CALCULATION Station and Unit Number: Catawba Nuclear Station Unit 1 & 2 Revision No.: 16 Title of Calculation: Class 1E Diesel Protective Relaying and Sequencer Undervoltaqe Relay Settings Calculation Number: CNC-1 381.05-00-0017 ACTIVE:dNo Yes [ TYPE 1: Yes [-] No OA CONDITION of items covered: e Microfiche Attachment List: Yes LI No 2]j (See Form 101.4) DSD List: Yes [l] No FX] (See Form 101.7)

Calculation Body Pages (Vol.) Supporting Documents (Vol.) Volumes Revised Deleted Added Revised Deleted Added Deleted Added 21 16.,17,18 16, 17,18, 18a,---

18b, 18c The signatures below certify that this calculation has been originated, checked, inspected and approved in accordance with established procedures.

,) h A /

Originated By: K.& L I.--L - & Date: D16te 1c.

Checked By: jt3g.4.A 7  : Date:  ;

Verification Method: Method 1 P1 Method 2 LI Method 3 [- Other LI Approved By: Date: 6 Issued Received Date: 3* ,*-

to DCRM: Date:612%/Z byDCRM:

Complete the Spaces Below for Documentation of Multiple Originators (Orig.) or Checkers (Chk.)

Pages: Orig.:_ Date:

Verif. Method 1[i] 2-] 3[- Other[i Chk.: Date:

Pages: Orig.:_ Date:

Verif. Method 1E] 2[1- 3[1 Other"- Chk.: Date:-

EDM 101, Revision 16

FORM 101.3 (11B0")

CERTIFICATION OF ENGINEERING CALCULATION - REVISION LOG Station And Unit Number: Catawba Nuclear Station Unit 1 & 2 Title Of Calculation: Class 1E Diesel Protective Relaying and Sequencer Undervoltage Relay Settings Calculation Number: CNC-1 381.05-00-0017 Active Calculation/Analysis Yes 0 No 0 CluainPgs(o) Supporting Volumes Orig Chkd Methf. Appr Datsse CluainPgsVo) Documentation (Vl ah Dt Rev. 23 e' No. Revised Deleted Added Revised Deleted Added Deleted Added Date Da e /6hr Date 1 s3T~lqD~oA -__ Date

____ ___ ___ ____ e1-~o& ~ _____ 1 ,7 0 Note I: When approving a Calculation revision with multiple Originators or Checkers, the Approver need sign only one block.

CERTIF2 8-06-04, Rev. 2

I (R3-94)

CERTIFICATION OF ENGINEERING CALCULATION STATION AND UNIT NUMBER: Catawho Nuclear Station Unit I & 2 kTITLE OF CALCULATION: Class IE Diesel Protective Relaving andSequenceer Undervoltage Relay Settingts CALCULATION NUMBER CNC-1381.05-00-0017 ORIGINALLY CONSISTING OF:

PAGES ii, iiiI THROUGH 20 TOTAL ATTACHMENTS TOTAL MICROFICHE ATTACHMENTS 0 TOTAL VOLUMES I TYPE I CALCULATION/ANALYSIS Q] Yes [ No TYPE I REVIEW FREQUENCY N/A THESE ENGINEERING CALCULATIONS COVER QA CONDITION 1 ITEMS'. IN ACCORDANCE WITH ESTABLISHED PROCEDURES, THE QUALITY HAS BEEN ASSURED AND I CERTIFY THAT THE ABOVE CAL-CULATION HAS BEEN ORIGINATED, CHECKED OR APPROVED AS NOTED BELOW:

ORIGINATED BY See Original Cover Sheet DATE-CHECKED BY See Original Cover Sheet DATE APPROVED BY See Original Cover Sheet DATE ISSUED TO DOCUMENTI MANAGEMENT N/A DATE RECEIVED BY DOCUMENT MANAGEMENT N/A DATE MICROFICHE ATTACHMENT LIST: [] Yes g No SEE FORM 101.4 ISSUE I

~1LREV CALCULATION PAGES (VOL) ATTACHMENTS (VOL)

ADDED VOLUMES DELETED ADDED ORIG DATE CHKD DATE APPR DATE DATE RECD NO REVISED DELETED ADDED REVISED DELETED DATE 14 None None None

Fom01077n(l-94)

CERTIFICATION OF ENGINEERING CALCULATION STATION AND UNIT NUMBER: CatawbaNuclear Station Unit I & 2 TITLE OF CALCULATION: Class IE Diesel Protective Relaying and Sequencer Undervolta e Relay Settings CALCULATION NUMBER CNC-1381 05-00-0017 ORIGINALLY CONSISTING OF:

PAGES ii, iii, I -r'D"mn I"I"u In TOTAL A1TACHMENTS TOTAL MICROFICHE ATTACHMENTS 0 TOTAL VOLUMES 1 TYPE I CALCULATION/ANALYSIS M Yes El No TYPE I REVIEW FREQUENCY 1 year THESE ENGINEERING CALCULATIONS COVER QA CONDITION 1 ITEMS. IN ACCORDANCE WITH ESTABLISHED PROCEDURES, THE QUALITY HAS BEEN ASSURED AND I CERTIFY THAT THE ABOVE CAL-CULATION HAS BEEN ORIGINATED, CHECKED OR APPROVED AS NOTED BELOW:

ORIGINATEDBY J.E. Herrington DATE 11-17-78 CHECKED BY R.M. Hartley DATE 11-20-78 APPROVED BY W.J. Foley DATE 12-06-78 ISSUED TO DOCUMENT MANAGEMENT N/A DATE RECEIVED BY DOCUMENT MANAGEMENT N/A DATE MICROFICHE ATTACHMENT LIST: El Yes 23 No SEE FORM 101.4 ISSUE a i REV CALCULATION PACES (VOL) ATTACHMENTS (VL) VOLUMES ORIG CHIKD APPR DATE NO REVISED, DELETED ADDED REVISED DELETED ADDED DELETED ADDED DATE DATE DATE RECD DATE 1-20 None None - I--'"5 12 . aI

______________ ______ pf- ii. &//31, d'*44  !-_,_"

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Form 01077 (R3-8M) I FORM 101.1 REVISION 11 1CERTIFICATION OF ENGINEERING CALCULATION STATION AND UNIT NUMBER Catawba Nuclear Station Units 1 & 2 TITLE OFCALCULATION Class 1E Diesel Protective Relaying and Sequencer Undervoltage Relay Settings CALCULATION NUMBER CNC-1381.05-00-0017 ORIGINALLY CONSISTING.OF:

PAGES ii, iii, 1 THROUGH 20 TOTAL ATTACHMENTS TOTAL MICROFIC E ATTACHMENýTS 0 TOTAL VOLUMES___ V /C~U.TOiA&SSYs ~t THESE ENGINEERING CALCULATIONAOE OA CONDITION ~-ITEMS. INACCORDANCE WITH ESTABLISHED PROCEDURES, THE QUALITY HAS BEEN ASSURED AND I CERTIFY THAT THE ABOVE CALCULATION HAS BEEN ORIGINATED, CHECKED OR APPROVED AS NOTED BELOW:

ORIGINATED BY __ J.E._ _ Herrington

_ _ _ _ _ _ _ _ _ _ _ _ _ _DATE 11-17-78 R.M. Hartley DATE. 11-20-78 CHECKED BY NOD APPROVEDBY W.J. Foley, Jr. DATE 12-06-78 ISSUED TO GENERAL SERVICES DIVISION DATE RECEIVED BY GENERAL SERVICES DIVISION DATE MICROFICHE ATTACHMENT LIST: 0 Yes XNo SEE BACK OF FORM Irp I I I C)

I CERTIFICATION OF ENGINEERING CALCULATION I Station and Unit Number Catawba Nuclear Station Units I & 2

-'tle of Calculation Class 1E Diesel Protective Relaying and Sequencer Undervoltage Relay Settings Calculation Number" CN-1381.05-17 These Engineering calculations cover items relating to nuclear safety.

In accordance With established procedures, the quality has been assured and I certify that the above-calculation has been performed, checked or.approved as noted below:

Performed by J. E. Herrinqto 27G V ' . Date "//-17-4.

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  • W I Checked by Date i'*L - Pr Approved by Date

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& IsI.on/Addenda Log:

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Form 101.2 (R3-03)

File/Calculation No. CNC- 1381.05-00-0017 REVISION DOCUMENTATION SHEET o

Revision Revision Description 15 Revised to include ABB Relay Model 411R0175 on P.19, 20 & 21 per Mod CE101444

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FOrmn101,2 ReVWW 1 26164 (R9-89) File/Calculation No. Ih'/, '6, 9O 'at;/f 40 REVISION DOCUMENTATION SHEET Review Revision Frequency Revision Description Number Changed Yes/No 7L4~7-  ? Im/A'CAz L V$( 1*,eeY11, .*gC/f,770IJ

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Form 101.2 Revision 0 26164 (12-82) Calculation No. CN-1381.05-17 46 /

REVISION DOCUMENTATION SHEET w/116 REVISION NUMBER fI4Ac/, .,I V REVISION DESCRIPTION 03 The 50 DGT Relay is to be set at 110% of the two-hour rating of the diesel generator (121% of the full-load rating) in accordance with Rev. 2 of Engineering Criteria RE-3.01, Section 5.4.5.

04 Added a time delay setting fo.r the diesel load sequencer undervoltage relays (27D's) to prevent false diesel starts due to system transients.

PCI ro 05 40 DGT setting changed to assure proper protection for a short-circuited field when the diesel generator is fully loaded.

06 "Analytical Model Review Control" per D.E.D. 11.4.12. No changes

'required.

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A. PROBLEM: Determine the settings for all essential diesel cenerator and seauencer relays.

B. RELATIONSHIP TO NUCLEAR SAFETY: The relays are a portion of the Essential Power Distribution System for Catawba Nuclear Station.

S C. DESIGN METHODS: Set the relays to protect the'Diesel Generator

.1 whenever it is operating and the sequencer undervoltage relays to A initiate sequencer operation.

D. APPLICABLE CODES AND STANDARDS (Name, Number, Date, Revision):

None E. OTHER DESIGN CRITERIA:

1) RE-3.01 -- Relaying - Auxiliary Systems - Equipment Protection Settings F. RELATED SAR CRITERIA (PSAR or FSAR, Page, Amendment)_

8.3.1.1.3.4 - Diesel Generator Protection Systems G. CALCULATIONS: ------------------------------------ Page No. 1 -l

2.0 ASSUMPTIONS

Page No. 0qj. 2

REFERENCES:

Page No. 191 7-1 J. CONCLUSION: -------------------- ------------------Page No.______

Station Catawba Nuclear Station Unit l&2 Rev. 12 File No. _ Sheet I Of 21 Subject Class IE Diesel Protective Relaying-and Sequencer Undervoltage Relay Settings

__.... _ _ _ _ _ By Date._/p.t, Prob. No. CNC-1381.05-00-0017 Checked I Datez

1. DIESEL GENERATOR BREAKER (1ETA18, 1ETB18, 2ETA18,

& 2ETB18) INSTANTANEOUS OVERCURRENT RELAY TRIP (50DGT).

Relay Type: ITE 50, 2-20 Amp tap range, Catalog # 218T0641, Reference Instruction Booklet IB-18.2.7-1 ISSUE G.

The 50DGT is utilized to protect the Emergency Diesel Generators from adverse overcurrent conditions during parallel operations by tripping its associated breaker and providing an alarm. When the D/G is running unparalleled (ex. during an emergency condition on an isolated bus), the 5ODGT provides only an alarm to warn of an overcurrent condition. The relay is set at 121% of full load current (based on 7000 kW generator rating, instead of 5750 kW derated value) in order to prevent spurious trips during testing.

Current Transformer (CT) Ratio = 1200 = 240 5

8750 kVA D/G Full Load Current = ____41___ = 1214.4 Amps DIG x FLA 1214.4 CT Secondary Current =-IG__ - 1214-4 5.06 Amps CT Ratio 240 Pickup Value = 1.21 x CT Secondary Current

= 1.21 x 5.06 Amps

= 6.12 Amps PICKUP SETTING = 6.1 AMPS

Station Catawba Nuclear Station Unit 1&2 Rev. 12 File No. Sheet 2-.Of 21 Subject Class 1E Diesel Protective Relaying and Sequencer Undervoltage Relay Settings By LQ4 Date vk Prob. No. CNC-1381.05-00-0017 Checked By DDate*4{ML

2. DIESEL GENERATOR VOLTAGE CONTROLLED OVERCURRENT (51V) RELAY Relay Type: Westinghouse COV-8, Range: 4-12 Amps, Catalog #

1876244, Reference Instruction Booklet I.L. 41-116E.

The Voltage Controlled Overcurrent (5 IV) relays are used in a two out of three logic scheme to isolate the generator from faults on the 4160 volt essential switchgear bus. These relays operate only when the voltage drops below a selected level (set at 80% of rated voltage).

This allows the relays to operate on overcurrents caused by faults which cause large voltage drops, possibly resulting in generator damage. The overcurrent unit should be set at maximum permissible overload for the generator.

CT Ratio 0 = 240 PT Ratio = 4200 =35 5 120 To determine Full Load Amps, use 7.5 MVA, 6.9/4.16 kV transformer rating.

FLA = 7.5 M x 1000 = 1041 Amps

,5 x 4.16 kV CTsECONDARY I1= FL _ 1041 Amps -4.34 Amps CT RA TIO 240 Select Tap 5 Time Dial 5 2.05 sec@500%

Note: Even though the generator's rated full load current is 1214.4 Amps, the relay setting is based on the 7.5 MVA transformer rating.

The Diesel Generator is provided as a backup to this transformer. In

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Station Catawba Nuclear Station Unit l&2 Rev. 12 File No. _ Sheet .3 Of 21 Subject Class IE Diesel Protective Relaving and Sequencer Undervoltage Relay Settings

___By Date j*.jg" Prob. No. CNC-1381.0-OO-001*7 Checked By */,Date ,,fV addition, the Diesel Generator switchgear breaker is rated at 1200 Amps.

The attached thermal damage curve has been plotted as time vs.

current, rather than time vs. P.U. rated KVA in order to permit plotting both the thermal damage and relay curves on one graph.

The following table gives the values for the thermal damage curve (SB= 8750 KVA, VB = 4.16 KV):

Spu S(KVA) I(Amps) Time(secs) 1.0 8750 1214.4 1.1 9625 1335.8 -

1.2 10,500 1457.3 930 1.3. 11,375 1578.7 294 1.4 12,250 1700.1 126 1.45 12,687.5 1760.9 87 1.49 13,037.5 1809.4 66 s

Note: S=SPUX SB; I-51V Settings: Amp Tap = 5 Amps Time Dial = 2.05 sec @ 500%

Voltage Tap = 96 Volts Since the relay trips the D/G Breaker via 2 out of 3 logic, it is desirable for it to trip before the incoming breaker (when paralleled) but after the feeder breakers have an opportunity to trip and clear the fault.

Therefore, the time dial was chosen to coordinate with the incoming breaker relay (when the D/G is paralleled) and the worst case feeder breaker (4.16 KV Essential Feeder to the 4.16 Blackout Switchgear) relay.

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Station Catawba Nuclear Station Unit l&2 Rev. 12 File No. _ Sheet (0 Of 21 Subject Class IE Diesel Protective Relaying and Sequencer Undervoltage Relay Settings

_.By . ,Date J _

Prob. No. CNC-1381.05-00-0017 Checked By aff-e Dat=/ &

3. DIESEL GENERATOR NEUTRAL OVERVOLTAGE (59DGN)

RELAY Relay Type: ITE 59G; Tap Range: 3-18 V; Catalog # 21 1E1 175; Reference Instruction Book IB-18.4.7-2, Issue C The 59DGN Relay is used to initiate an alarm, and trip the D/G breaker (if the D/G is paralleled to the essential bus) when ground current appears in the generator neutral grounding transformer. The pickup voltage should be approximately 5% of the maximum ground fault voltage. The time dial setting should be a moderately inverse curve to give a slight time delay for minimum pickup voltages and a relatively fast pickup for ground voltages of approximately 15% or higher.

Grounding Transformer: 10 KVA, 4160/120 VAC Grounding Resistor: 1.08 C, 600 Volts, 84 Amps (From Calculation CNC-1381.05-00-0009 and CNM-1301.00-0245, CE-3608)

Transformer Ratio = 4160/120 = 34.67 = N Voltage across resistor during a line to ground fault is:

_ V 4160 69.28 Volts VsEc,- F3N - ./3(34.67)

Pickup Setting z .05 x 69.28 V = 3.46 V 59 DGN Settings: 3 Volts Time Dial 4; 2 secs @ 300 %

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Station Catawba Nuclear Station Unit l&2 Rev. 12 File No. Sheet ._IOf 21 Subject Class 1E Diesel Protective Relaying and Se uencer Undervoltage Relay Settings By 4 Date.101/&

Prob. No. CNC-1381.05-00-0017 Checked By PDate. f

4. DIESEL GENERATOR CURRENT DIFFERENTIAL (87G)

RELAY:

Relay Type: Westinghouse SA-1, 0.14 Amp Minimum Pickup, Catalog

  1. 290B225A10, Reference Instruction Booklet I.L.41-348.1F.

CT Ratio: 1200/5 This is an instantaneous relay and therefore requires no setting.

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Station Catawba Nuclear Station Unit l&2 Rev. 12 File No. Sheet _K Of 21 Subject Class 1E Diesel Protective Relaying and Seueýncer Undervoltage Relay Settings

_ __ _By . Date  %

Prob. No. CNC-1381.05-OO-0017 Checked By... Date# il

5. DIESEL GENERATOR REVERSE POWER (32DGT) RELAY:

Relay Type: CW Power Relay, Tap Range: 2-20 Watts, Catalog #

289B988A17, Reference Instruction Booklet I.L.41-241.3J.

The 32DGT relay is used to protect the Diesel Generator from motoring should a loss of prime mover occur when the generator is paralleled with the essential bus. To determine the pickup power setting, determine the power consumption under motoring conditions, as specified by the generator manufacturer.

CT Ratio -1200 - 240 PT Ratio= 4200 35 5 120 Motoring Levels of Diesel Generator (See attached Vendor Data):

a) Loss of Prime Mover (Fuel): I = 1000A, P.F. = 0.05 b) Diesel Generator at standstill when it is accidently tied to live bus:

I = 9900 A, P.F. = 0.10 c) Diesel Generator operating in parallel with system and a loss of excitation occurs: I = 330 A, P.F. = 0.05 To determine the Power Tap Setting, calculate minimum power available from motoring levels of the Diesel Generator. (Note: the loss of excitation motoring level will not apply due to a 40DGT, Loss of excitation, relay being provided.)

The minimum power available during motoring will occur during the loss of prime mover.

VL..L = PT Secondary Line to Line Voltage = 120 Volts 1-1 1-1 ID ID .$ ::!; :,' '-i' . "

Station Catawba Nuclear Station Unit 1&2 Rev. 12 File No. _ Sheet .A. Of 21 Subject Class IE Diesel Protective Relaying and Sequencer Undervoltaee Relay Settings 1_By__ _ _ _ Date f I?k Prob. No. CNC-1381.05-00-0017 Checked By Date/214/!g

= 120 VL-N = PT Secondary Line to Neutral Voltage P1,= Power per phase on secondary = 12 X VL-N X P.F.

11 = 1000 Amps I2 = 1000/240 = 4.17 Amps 120 Pi, = 4 .17 x x .05 120 Watt Tap Setting =5 x 4.17 x - x.05 = 25.02 Watts Select Watt Tap = 20 Watts Time Delay Setting = 3 Secs @ 200 %

ICS Setting = 2.0 Amps

  • Time Dial Setting = 3 Note: I second delay at 200% should be sufficient to override any transient conditions. However, experience has shown that a 3 second delay should prevent the spurious trips detailed by minor mods CE-3592 and CE-3592.

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( i May 10, 1977 Duke Power Company P. 0. Box 2178 Charlotte, North Carolina 28242 Attention: Mr. R. H. Wright

Subject:

Catawba Nuclear Station Units I and 2 Diesel Generators (CNl3O.O0)

Mill Power No. .C-20660 De Laval S/N 75017/20 Gentlemen:

In reference to your letter of March 9, 1977 regarding generator motoring conditions, we are enclosing in the attached the currents and power factors under the conditions you mentioned. As s.tated 0I in your letter the generator would be connected to a live 4160 volt bus, therefore, we expect this to be voltage under the con-ditions postulated.

A thermal damage curve for the subject generator is also enclosed.

Very truly yours, DE LAVAL TURBINE INC.

Engine & Compressor Division 7?4LL-.

A. Rafalski Project Engineer AR: ljj cc: C. A. Newell C. H. Moeller Enclosures I

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MILC POWER SUPPLY CO. P.O. iC-2066O I. DUKE POWER CO. ITEM #CU-.331;00-2 CATAWBA UNIT 1 S.O. 17503519/522 DIESEL - GENERATORS 1A & 18 4/20/77 While generator is connected to an energized 4160 Volt bus. The current and power factor undcr- the following conditions of waotoiing will be as follows:

a)

  • f prime mover - Vhen full load field current was being applied IL..= 1000 pAps, P.F, .0s b) Diesel engine at standstill when generator is accidentally tied to live bus (neglectin g the effect of diesel engine coupled te generator, the generator will start as motor.

Locked rotor current = 9900 Amps Locked Totor P.F. - .10 c) Diesel generator operating in parallel withl system -

a loss of excitation occurs.

Diesel generator running at synchronous spccd will draw magnetization curient from the bus.

IL= 330 Amps, P.IK. .OS t

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Station Catawba Nuclear Station Unit M&2 Rev. 12 File No. _ Sheet .& Of 21 Subject Class 1E Diesel Protective Relavin -andSequencer Undervoltage Relay Settings By *Date Datery Prob. No. CNC-1381.05-00-0017 Checked By .DDate "

6. DIESEL GENERATOR LOSS OF EXCITATION (40DGT)

RELAY:

Relay Type: GE CEH Loss of Excitation Relay, Tap Range: Offset 0-4 ohms, Characteristic circle diameter: 5-50 ohms, Single mho unit, catalog # 12CEH51A4A, Reference Instruction Booklet GEK-27887C (Taps 0,0.5,1.0,2.5,4.0)

The 40DGT Relay is used to protect the diesel generator from damage should a loss of excitation occur. The relay is used to initiate an alarm, and trip the D/G breaker (if the D/G is paralleled to the essential bus).

There are two settings that must be made on the CEH 51A relay. They are the Offset Tap Setting and the Circle Diameter Restraint Tap Setting. Per Instruction Booklet GEK-27887C, the following Offset and Diameter settings are recommended:

Offset = One half of the transient reactance = X'd/2 Diameter = Synchronous reactance = Xd The following information is required to make settings:.

Transient reactance = X'd = 0.170 pu Synchronous reactance = Xd = 1.030 pu Base MVA = Generator rating = 8.750 MVA Base KV = Generator rating = 4.16 KV CT Ratio = 1200/5 = 240 PT Ratio = 4200/120 = 35 ZBASE (sec) = (KVa ) 2 x CTRatio - (4.16kV) 2 x 240 MVAa.s PTRatio 8.75 MVA 35

= 13.56 QsEcoNDARy 1-' 1

Station Catawba Nuclear Station Unit 1&2 Rev. 12 File No. _ Sheet A Of 21 Subject Class IE Diesel Protective Relayin and Seouencer Undervoltage Relay Settings

-By ./, Date ildgk, Prob. No. CNC-1381.05-0-0017 Checked By Date/

X'd(sec) = (ZBASE) X (X'd pu) = 13.56 x 0.170 = 2.31 92SECONDARy Xd(sec) = (ZBASE) X (Xd pu) = 13.56 x 1.030 = 13.97 nSECONDARy I

12CEH51A4A is a 5-50 ohm relay with a 0.5-4.0 ohm offset.

A) Offset Tap (Offset setting is the difference between the two offset taps used):

Xd 2.31 - 1.15 Q 2 2 Use the next higher setting: 1.5 Q)

Set "L" lead on 1.0 and "H" lead on 2.5 B) Set Restraint Tap to value corresponding to actual synchronous reactance of machine in secondary ohms (Xd = 13.97 f2).

Restraint Tap Setting (%) = (Basic Minimum Diameter)xlO0 (Desired Diameter in Secondary Ohms) 5x 5 X100 -035.79 %

13.97 Use next lower tap: 35 %

Set upper number one lead on tap.5.

Set lower number one lead on tap 30.

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Station Catawba Nuclear Station Unit 1&2 Rev 16 Sheet Jof Subject Class 1E Diesel Protective Relaying and Sequencer Undervoltage Relay Settings File No. CNC-1381,05-90-0017 Orig By ,g4Ap i," Date ILL&__-

Checked By Date (-/a, ..J*-.

7. DIESEL GENERATOR LOAD SEQUENCER UNDERVOLTAGE (27) RELAYS: 27XA, 27YA, 27ZA, 27XB, 27YB, 27ZB Relay Type ITE 27D, Tap Range 60-110 Volts, Time Delay: 0.1-1.0 seconds, Catalog # 211R6175, Reference Instruction Booklet IB- 18.4.7-2 Issue E.

These devices are applied on the 4.16 kV essential switchgear and are located on the Diesel Generator Load Sequencer Panels 1DGLSA-1, 1DGLSB-1, 2DGLSA-1 and 2DGLSB-1. The relays use 2 out of 3 logic to detect loss of power on the respective essential bus.

The Diesel Generator Load Sequencer undervoltage relays are installed to initiate an Essential Diesel Generator Start signal for loss of voltage on the 4.16 kV Essential switchgear. Loss of voltage should be sensed as soon as practical to permit system separation and connection to the emergency Diesel Generators. The setpoint (drop out) for loss of voltage (LOV) is assumed to be above the 80% rated starting voltage capabilities of the 4.16 kV essential motors. (80% of

  • 4 kV = 3200 volts). The 100 volt tap was selected since it equates to 3500 volts (84.1% of 4.16 kV nominal system voltage) when referred to the primary of the 4200/120 volt potential transformers (PT ratio = 4200/120 = 35/1).

A time delay is employed to prevent unnecessary diesel starting during system transients. Since experience indicates that system transients typically are shorter than 10 cycles, the time delay should be set to:

Td = 10 cycles/60Hz = 0.167 seconds SITA 91-01(CN) identified no evidence was found that all possible errors (calculation, calibration, PT's, relay), as well as drift, were included in determining the minimum acceptable value or relay drop out setpoint. PIP O-C91-0028 (PIR 0-C91-0381) addressed the degraded voltage relay (DGVR) setpoint calculations in detail but the LOV setpoint and allowable Technical Specification value were only briefly mentioned.

The Channel Uncertainty (CU) analysis below is performed with the square root sum of the squares methodology per typical fleet practice and review of Reference 2. The scope section of EDM 102, Rev 3 (Instrument Setpoint/Uncertainty Calculations) states that EDM 102 is not specifically applicable to protective relaying.

/&..I Station Catawba Nuclear Station Unit 1&2 Rev 17 Sheet of I Subject Class 1E Diesel Protective Relaying and Sequencer Undervoltage Relay Settings File No. CNC-1381.05-0O-0017 Orig By .A, 15ý,X Date SChecked By A Leý Date t/4Il 1 7 NOTE: Pages 16.1, 17.1, 18.1, 18a.1, 18b.1, 18c.1 and 21.1 become the effective pages for post 9.45ý LAR implementation for the LOV nominal and allowable value setpoint changes. Pages 16, 17, 18, 18a, 18b, 18c and 21 are pre-LAR implementation.

7. DIESEL GENERATOR LOAD SEQUENCER UNDERVOLTAGE (27) RELAYS: 27XA, 27YA, 27ZA, 27XB, 27YB, 27ZB Relay Type ITE 27D, Tap Range 60-110 Volts, Time Delay: 0.1-1.0 seconds, Catalog # 211R6175, Reference Instruction Booklet IB- 18.4.7-2 Issue E.

These devices are applied on the 4.16 kV essential switchgear and are located on the Diesel Generator Load Sequencer Panels 1DGLSA-1, 1DGLSB-1, 2DGLSA-1 and 2DGLSB-1. The relays use 2 out of 3 logic to detect loss of power on the respective essential bus.

The Diesel Generator Load Sequencer undervoltage relays are installed to initiate an Essential

  • Diesel Generator Start signal for loss of voltage on the 4.16 kV Essential switchgear. Loss of voltage should be sensed as soon as practical to permit system separation and connection to the emergency Diesel Generators. The setpoint (drop out) for loss of voltage (LOV) is selected to be above the 80% rated starting voltage capabilities of the 4.16'kV essential motors. (80% of ,

4 kV = 3200 volts). The 100 volt tap was selected since it is closest to the setpoint of 3450 volts (82.9% of 4.16 kV nominal system voltage) when referred to the primary of the 4200/120 volt i/, (,V potential transformers (PT ratio = 4200/120 = 35/1).

A time delay is employed to prevent unnecessary diesel starting during system transients. Since experience indicates that system transients typically are shorter than 10 cycles, the time delay should be set to:

Td = 10 cycles/60Hz = 0.167 seconds SITA 91-01(CN) identified no evidence was found that all possible errors (calculation, calibration, PT's, relay), as well as drift, were included in determining the minimum acceptable value or relay drop out setpoint. PIP 0-C91-0028 (PIR 0-C91-0381) addressed the degraded voltage relay (DGVR) setpoint calculations in detail but the LOV setpoint and allowable Technical Specification value were only briefly mentioned.

  • The Channel Uncertainty (CU) analysis below is performed with the square root sum of the squares methodology per typical fleet practice and review of Reference 2. The scope section of

Station Catawba Nuclear Station Unit 1&2 Rev 16 Sheet 17 of 21 Subject Class 1E Diesel Protective Relaying and Seciuencer Undqrvoltage Relay Settings File No.CNC-1381.05-00-O017 Orig By Aab! Date 6/16, /12.

Date (; ,, '

Checked By Z:5,-/

Channel Uncertainty (CU)

1) (VV) Voltage Variation - The 27D undervoltage relay has the following rating of variation in operating voltage for variation in control power voltage supplied to the relay:. +/-0.2V change in operating voltage for 1OV variation in control power voltage (Reference 1). The worst case voltage drop for the Vital Instrumentation and Control Power System occurs with a concurrent safety injection actuation and a loss of offsite power. The bounding scenario being modeled for this relaying is a safety injection actuation with offsite power still available. When offsite power is still available the Vital Instrumentation and Control Power System battery chargers will limit the voltage drop magnitude and duration. This analysis is being performed for the worst case conditions so that it is a bounding analysis. The worst case voltage drop according to Reference 5, will be from 132 volts to 115 volts. 132 - 115 = 17 volts.

VV = 0.2V/1OV X 17V = +/-0.34V

2) (TV) Temperature Variation - The 27D undervoltage relay has the following rating for variation in temperature: +/-0.5V over the temperature range of 20-40 degrees C (Reference 1).

The expected temperature range for the Diesel Generator tunnel areas where these relays are located is 35 - 120 degrees F, per Reference 3. In the event of a LOCA or other accident requiring Safety Injection Actuation the Diesel Generator tunnel areas will not see any significant change in location temperature at the beginning of the event. Per Reference 2 it is only necessary to consider process and environmental conditions that occur during the postulated event. The Diesel Generator tunnel areas are not expected to exceed 40 degrees C (104 degrees F) during the time frame the 27D relays are required to operate. The typical temperature tolerance of +/-0.5V for the temperature range of 20 - 40 degrees C will be used in this calculation.

TV = +/-0.5V.

3) 27D relay accuracy - Operating voltage is adjusted as required at each test interval by accurate and proven digital test equipment. No separate uncertainty is assigned for error in sensing the correct magnitude of source voltage. Per discussion with ABB Technical Support personnel, only the W and TV terms discussed above are applicable for a 27D relay tested and calibrated in this manner. Relay drift between test intervals is addressed separately below.

Station Catawba Nuclear Station Unit 1&2 Rev 17 Sheet __of ,_t Subject Class 1E Diesel Protective Relaying and Sequencer Undervoltage Relay SettinRs File No. CNC-1381.05-00-0017 Ong By ,,Q' Date ____'_ ....

Checked By9A] Le Date A_

EDM 102, Rev 3 (Instrument Setpoint/Uncertainty Calculations) states that EDM 102 is not specifically applicable to protective relaying.

Channel Uncertainty (CU)

1) (W) Voltage Variation - The 27D undervoltage relay has the following rating of variation in operating voltage for variation in control power voltage supplied to the relay: +/-0.2V change in operating voltage for 10V variation in control power voltage (Reference 1). The worst case voltage drop for the Vital Instrumentation and Control Power System occurs with a concurrent safety injection actuation and a loss of offsite power. The bounding scenario being modeled for this relaying is a safety injection actuation with offsite power still available. When offsite power is still available the Vital Instrumentation and Control Power System battery chargers will limit the voltage drop magnitude and duration. This analysis is being performed for the worst case conditions so that it is a bounding analysis. The worst case voltage drop according to Reference 5, will be from 132 volts to 115 volts. 132 - 115 = 17 volts.
  • VV = 0.2V/1OV X 17V = +/-0.34V
2) (TV) Temperature Variation - The 27D undervoltage relay has the following rating for variation in temperature: +/-0.5V over the temperature range of 20-40 degrees C (Reference 1).

The expected temperature range for the Diesel Generator tunnel areas where these relays are located is 35 - 120 degrees F, per Reference 3. In the event of a LOCA or other accident requiring Safety.Injection Actuation the Diesel Generator tunnel areas will not see any significant change in location temperature at the beginning of the event. Per Reference 2 it is only necessary to consider process and environmental conditions that occur during the postulated event. The Diesel Generator tunnel areas are not expected to exceed 40 degrees C (104 degrees F) during the time frame the 27D relays are required to operate. The typical temperature tolerance of 10.5V for the temperature range of 20 - 40 degrees C will be used in this calculation.

TV = +O.5V.

3) 27D relay accuracy - Operating voltage is adjusted as required at each test interval by accurate and proven digital test equipment. No separate uncertainty is assigned for error in sensing the correct magnitude of source voltage. Per discussion with ABB Technical Support
  • personnel, only the W and TV terms discussed above are applicable for a 27D relay tested and calibrated in this manner. Relay drift between test intervals is addressed separately below.

Station Catawba Nuclear Station Unit 1&2 Rev 16 Sheet I) of 7-1 Subject Class 1E Diesel Protective Relaying and Sequencer Undervoltage Relay Settings File No. CNC-1381.05-0,-0017 Orig By ,.,4" Date 6/2-..

Date !f,,1/z- /

Checked By 0. :;E-4

4) Seismic - Since the ABB Type 27D relay is a solid state device and has no electro-mechanical parts, it is not expected to experience degradation of performance during a seismic event. This term is not applicable.
5) Radiation - The undervoltage relays are located in a Mild EQ environment per Reference 3.

The low radiation dose rates are not expected to affect performance. Also, any potential cumulative effects are minimized by adjustments made during periodic calibrations. This term is not applicable.

6) (RD) Relay drift - Drift is a variation in instrument channel output that may occur between calibrations that cannot be related to changes in the process variable or environmental conditions. The best source data for relay drift is from detailed calibration records. Relay specific calibration records from the past 11 monthly calibrations were reviewed for use in updating this analysis. The data points that were reviewed were the AS LEFT dropout voltage for one month compared to the AS FOUND dropout voltage at the next monthly check. This review shows that the average drift between monthly calibrations is 0.1V. The maximum drift
  • measured for the complete set of calibration data on all four trains was 0.7V. Based on this operating experience a relay drift value of 0.7V will be used in this analysis.

RD = +0.7V

7) (VT) Potential transformer accuracy - The potential transformer providing sensing voltage to the 27D relay has a rated accuracy of +/-0.3% of the indicated voltage per Reference 4. For conservatism this uncertainty term will be calculated based on the Degraded Voltage Relay Allowable Value. Per Reference 7 this minimum value for operation of the Degraded Voltage Relays is 3738V or 106.8V on the potential transformer secondary.

VT = 106.8 X .003 = +/-0.32V

8) (MTE) Measuring and Test Equipment - The controlling procedures for calibration of the 27D Loss of Voltage Relays (IP/1(2)/A/4971/010) require the relays be tested and calibrated with a Doble Model F6150 test set. The accuracy of the test set is +/-0.5% of setting per Reference 6.

MTE = 100X .005 = +0.5V All of the terms assigned values above are random independent variables, with the exception of 0 relay drift which is treated as a bias.

M

Station Catawba Nuclear Station Unit 1&2 Rev 17 Sheet __of 1 Subject Class IE biesel Protective Relaying and Sequencer Undervoltage Relay Settings File No. CNC-1381.05-00-00 17 Orig By . Date ________

Checked By 0btP" Date144

4) Seismic - Since the ABB Type 27D relay is a solid state device and has no electro-mechanical parts, it is not expected to experience degradation of performance during a seismic event. This term is not applicable.
5) Radiation - The undervoltage relays are located in a Mild EQ environment per Reference 3.

The low radiation dose rates are not expected to affect performance. Also, any potential cumulative effects are minimized by adjustments made during periodic calibrations. This term is not applicable.

6) (RD) Relay drift - Drift is a variation in instrument channel output that may occur between calibrations that cannot be related to changes in the process variable or environmental conditions. The best source data for relay drift is from detailed calibration records. Relay specific calibration records from the past 11 monthly calibrations were reviewed for use in updating this analysis. The data points that were reviewed were the AS LEFT dropout voltage for one month compared to the AS FOUND dropout voltage at the next monthly check. This review shows that the average drift between monthly calibrations is 0.1V. The maximum drift
  • measured for the complete set of calibration data on all four trains was 0.7V. Based on this operating experience a relay drift value of 0.7V will be used in this analysis.

RD = +0.7V

7) (VT) Potential transformer accuracy - The potential transformer providing sensing voltage to the 27D relay has a rated accuracy of +/-0.3% of the indicated voltage per Reference 4. For conservatism this uncertainty term will be calculated based on the Degraded Voltage Relay Allowable Value. Per Reference 7 this minimum value for operation of the Degraded Voltage Relays is 3738V or 106.8V on the potential transformer secondary.

VT = 106.8 X.003 =+0-32V

8) (MTE) Measuring and Test Equipment - The controlling procedures for calibration of the 27D Loss of Voltage Relays (IP/1(2)/A/4971/010) require the relays be tested and calibrated with a Doble Model F6150 test set. The accuracy of the test set is +/-0.5% of setting per Reference 6. .

MTE = 98.5 X .005 = +/-0.493V

  • All of the terms assigned values above are random independent variables, with the exception of relay drift which is treated as a bias.

Station Catawba Nuclear Station Unit 1&2 Rev 16 Sheet a of ?I Subject Class lE Diesel Protective Relaying and Seciuencer Undervoltage Relay Settings File No. CNC-1381.05-00-0017 Orig By R. *N

  • Date Ihib-Checked By 4. - Date CU =+ SQ RT (VVZ + TV 2 + VT 2 + MTE 2 ) + RD CU = +/-SQ RT (0.342 + 0.52 + 0.322 + 0.52) + 0.7 CU = +/-SQ RT (0.1156 + 0.25 + 0.1024 + 0.25) + 0.7 CU = +/-SO RT (0.718) + 0.7 CU = +0.847 + 0.7 CU = +/-1.6V The purpose of this calculation revision is to correct inappropriate input data for the uncertainty associated with the 27D Loss of Voltage Relay. The positive and negative uncertainty will be applied in reference to the Technical Specification Nominal Trip Setpoint value of 3500V. This revision does not involve any proposed change to the nominal trip setpoint.

NOTE: The term "pickup" for a 27D relay refers to the voltage where the relay will operate to indicate a loss of voltage. Per Reference 7 the nominal trip setpoint for the LOV relays is 3500V.

The pickup setpoint must be converted to the equivalent 120V base relay setting across the VT ratio, 4200/120.

Actual setpoint = 3500 X 120/4200 = 100V Therefore, due to CU, the setpoint could vary in the following range Pickup + CU = 100 + 1.6 = 101.6V Pickup - CU = 100 - 1.6 = 98.4V Since the CU is calculated using square root sum of the squares method, there is the possibility that the actual error (and drift) could be more than calculated.

The difference between the LOV relay pickup and dropout, deadband, is approximately 3% or 3.OV (3% of 100 V setting) and is not adjustable (Reference 1). The reset point should be estimated by the following equation:

0

Station Catawba Nuclear Station Unit 1&2 Rev 17 Sheet __ of a,(

Subject Class 1E Diesel Protective Relaving-and Sequencer Unde roltage Relay Settings File No. CNC-138.1.0S*QO9017 Orig By .V.^2 Date 4'i Checked By R Date +

CU =+/- SQ RT (VV 2 + TV 2 + VT2 + MTEI) + RD *_

CU = +/-SQ RT (0.342 + 0.52 + 0.322 + 0.4932) + 0.7 CU = +/-SQ RT (0.1156 + 0.25 + 0.1024 + 0.243) + 0.7 CU = +/-SQ RT (0.711) + 0.7 CU = +0.843 + 0.7 CU = +/-1.54V The positive and negative uncertainty will be applied in reference to the Technical Specification 0o.11 Nominal Trip Setpoint value of 3450V. I

  • NOTE: The term "pickup" for a 27D relay refers to the voltage where the relay will operate to indicate a loss of voltage. Per Reference 7 the nominal trip setpoint for the LOV relays is 3450V. I e_.

The pickup setpoint must be converted to the equivalent 120V base relay setting across the VT ratio, 4200/120.

Actual setpoint = 3450 X 120/4200 = 98.5V I' Therefore, due to CU, the setpoint could vary in the following range Pickup + CU = 98.5 + 1.54 = 100.04V Q Pickup - CU = 98.5 - 1.54 = 96.96V The difference between the LOV relay pickup and dropout, deadband, is approximately 3% or 3.OV (3% of 98.5 V setting) and is not adjustable (Reference 1). The reset point should be I -.

estimated by the following equation:

Reset = pickup X percent deadband Reset = 98.5 X 1.03 = 101.5V 11Z '

Station Catawba Nuclear Station Unit 1&2 Rev 16 Sheet 15b of 2-1 Subject Class 1E Diesel Protective Relaying and Sepuencer Undervoltage Relay Settings File No. CNC-1381.05-QQ017 Orig By Ae " Date 611ih2a Checked By _6. ____ -- Date tvA-S/r1A.

Reset = pickup X percent deadband Reset = 100 X 1.03 = 103V Therefore, due to CU, the reset could vary in the following range:

Reset + CU = 103 + 1.6 = 104.6 Reset - CU = 103 - 1.6 = 101.4 The time delay should remain set to 10 cycles to prevent unnecessary diesel starting during brief system transients. An acceptable tolerance of +/-1 cycle is provided based on the manufacturing accuracy of +/-10%.

The relay shall be set as follows:

PICKUP TAP: 100V PICKUP VOLTAGE: 100V +/-QV TIME DELAY: 10 Cycles, 0.167 sec.

The setting tolerance is +/-0.OV so that the relays will be set to exactly the proper setpoint.

However, when the setpoint is examined after setting the relay or for calibration check it may drift by the amount described below.

Drift associated with the relay Drift = +/-SQ RT (W 2 + TV 2 ) + RD Drift = +/-SQ RT (0.342 + 0.52) + 0.7 Drift = +/-1.3V Therefore, the setpoint should remain within the range (setpoint +/- drift).

Actual pickup setpoint + drift = 100 + 1.3 = 101.3 Actual pickup setpoint - drift = 100 - 1.3 = 98.7

Station Catawba Nuclear Station Unit 1&2 Rev 17 Sheet -of '

Subject Class 1E Diesel Protective Relaving and Sequencer Undervoltaee Relay Settings File No. CNC-138105-00-001 Orig By 1!1. "4*ZQ Date_________

Checked By

  • Date 4,&=_

Therefore, due to CU, the reset could vary in the following range:

Reset + CU = 101.5 + 1.54 = 103V &

A#.i,4 Reset - CU = 101.5 - 1.54 = 100V The time delay should remain set to 10 cycles to prevent unnecessary diesel starting during brief system transients. An acceptable tolerance of +/-1 cycle is provided based on the manufacturing accuracy of +/-10%.

The relay shall be set as follows:

PICKUP TAP: 100V - Il PICKUP VOLTAGE: 98.5V TIME DELAY: 10 Cycles, 0.167 sec.

The setting tolerance is +/-O.OV so that the relays will be set to exactly the proper setpoint.

However, when the setpoint is examined after setting the relay or for calibration check it may drift by the amount described below.

Drift associated with the relay Drift = +/-SQ RT (W2 + TV2 ) + RD Drift = +/-SQ RT (0.342 + 0.52) + 0.7 Drift = +/-1.3V Therefore, the setpoint should remain within the range (setpoint +/- drift).

Actual pickup setpoint + drift = 98.5 + 1.3 = 99.8 j 1" Actual pickup setpoint - drift = 98.5 - 1.3 = 97.2 0

Station Catawba Nuclear Station Unit 1&2 Rev 16 Sheet Irof 2)

Subject Class 1E Diesel Protective Relaying and Sequencer UndervoItage Relay Settings Checked By, - Daer File No. CNC-1382.05-00-0017 Orig By I-Date 010m Although the pickup setpoint has a _0.0V setting tolerance, +/-0.5V is an expected range for setpoint drift. If the relay setpoint drift is greater than 0.5V and less than 1.3V a calibration is required. If the relay were to drift more than 1.3V, Engineering should be notified and the relay re-calibrated.

References:

1. IB 18.4.7-2, Issue E, ABB Single Phase Voltage Relays Instructions
2. ANSI/ISA-67.04.01-2006 (Setpoints for Nuclear Safety-Related Instrumentation)
3. CNLT-1780-03.03, Rev. 30, Environmental Qualification Criteria Manual
4. CNM-1312.02-0054.001, Rev. Dl1, 4160V Switchgear Instruction Book
5. CNC-1381.05-00-0122, Rev. 5 (Station Blackout Battery Sizing Calculation for the 125 VDC Vital I&C Batteries)
6. DPC-1210.04-00-0005, Rev. 4 (Measuring and Test Equipment (M&TE) Uncertainties)

Attachment 36

7. Technical Specification 3.3.5 (Loss of Power (LOP) Diesel Generator (DG) Start Instrumentation)

Station Catawba Nuclear Station Unit 1&2 Rev 17 Sheet roof o_

Subject Class 1E Diesel Protective Relaying and S* 9 uencer UndervoJtage Relay Settings File No. CNC-1381.05-00-0017 4

Orig Date b1 0 ,

.47By

)14- Date Checked By Jb Although the pickup setpoint has a +/-0.0V setting tolerance, +/-0.5V is an expected range for setpoint drift. If the relay setpoint drift is greater than 0.5V and less than 1.3V a calibration is required. If the relay were to drift more than 1.3V, Engineering should be notified and the relay re-calibrated.

References:

1. IB 18.4.7-2, Issue E, ABB Single Phase Voltage Relays Instructions
2. ANSI/ISA-67.04.01-2006 (Setpoints for Nuclear Safety-Related Instrumentation)
3. CNLT-1780-03.03, Rev. 30, Environmental Qualification Criteria Manual
4. CNM-1312.02-0054.001, Rev. D11, 4160V Switchgear Instruction Book S. CNC-1381.05-00-0122, Rev. 5 (Station Blackout Battery Sizing Calculation for the 125 VDC Vital I&C Batteries)
6. DPC-1210.04-00-0005, Rev. 4 (Measuring and Test Equipment (M&TE) Uncertainties)

Attachment 36

7. Technical Specification 3.3.5 (Loss of Power (LOP) Diesel Generator (DG) Start Instrumentation) as amended by LAR from PIP C-12-5680.
8. Technical Specification 3.3.2, Table 3.3.2-1, Item 6.d (Auxiliary Feedwater Actuation on Loss of Offsite Power) as amended by LAR from PIP C-12-5680.
9. Historical PIPs: C-11-8526, C-11-8680, C-12-5423, C-12-5424, C-12-5680 0

Station Catawba Nuclear Station Unit l&2 Rev. 12 File No. _ Sheet Ia Of 21 Subject Class IE Diesel Protective Relaying and Sequencer Undervoltage Relay Settings

.By Date Date.

Prob. No. CNC-1381.05-00-0017 Checked By Z.ý../DateL( r

8. DIESEL GENERATOR LOAD SEQUENCER SPECIAL UNDERVOLTAGE (27) RELAYS: 27XA/SPL, 27XB/SPL.

Relay Type: ITE 27H, Tap Range 60-110 Volts, Catalog #L411-l'145) N-V Sk

'JA.0 oA- 21 1B0175D, Reference Instruction Booklet 18-18.4.7-2, Issue C.

These relays are applied on the 4.16 KV essential swi'tchgear and are located in the Diesel Generator Load Sequencer Panels 1DGLSA-1, IDGLSB-1, 2DGLSA-1, and 2DGLSB-1. The relays allow an accelerated sequence and take the sequencer out of test mode should a blackout occur.

The setting of these relays should be above that of the three sequencer 27D relays. They are set as follows:

PT Ratio = 4200/120 = 35 Choose Pickup = 110 Volts; This is equal to: 35 x 110 = 3850 Volts 3850/4160 = .925; This corresponds to 92.5 % of nominal voltage.

W ID 11.

Station Catawba Nuclear Station Unit l&2 Rev. 12 File No. Sheet zoOf 21 Subject Class 1E Diesel Protective Relaying and Seguencer Undervoltage Relay Settingss By /zf-%* Date .--

Prob. No. CNC-1381.05-00-0017 Checked By ,f - Date-H. ASSUMPTIONS 4.16 KV Essential Switchgear bus voltage less than 3500 Volts (LVR Dropout Setpoint) is indicative of loss of bus voltage.

I. REFERENCES

1. 4.16 KV Essential Swivchgear I/B, CNM-1312.02-00-0054
2. ITE Protective Relays I/B, IB-18.2.7-1, Issue G
3. Westinghouse Relay I/E, IL 41-116E
4. ITE Protective Relays I/B, IB-18.4.7-2, Issue C & D
5. Westinghouse Relay I/B, IL 41-348.1F
6. Westinghouse Relay I/B, IL 41-241.3J
7. GE Relay I/B, GEK-27887C
8. 230 KV Switchyard Protective Relay Calculation, CNC-1381.06-00-0037. "xSS- .-L . I

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Station Catawba Nuclear Station Unit 1&2 Rev 16 Sheet 2.1 of 21 Subject Class 1E Diesel Protective Relaying and Seguencer Undervoltage Relav Settings File No. CNC-1381.05-00-0017 Orig By gLp.* Date V/Q12-.

Checked By ... Date J. CONCLUSIONS CODE # RELAY ANSI NO. & MANUFACTURER, TYPE, SETTING FUNCTION CATALOG #, RANGE 1 50 DGT, Diesel ITE Type 50, Catalog # Tap: 6.1 Amps Generator Instantaneous 218T0641, 2-20 Amps Overcurrent 2 51 V, Diesel Generator Westinghouse Type COV-8, Tap: 5 Amps Voltage Controlled Catalog # 1876244, 4-12 Amps, Trip Time: 2.05 sec @ 500 %

Overcurrent 80-100 Volts Voltage Tap: 96 Volts Target: 0.2 Amps 3 59 DGN, Diesel ITE Type 59G, Tap: 3 Volts Generator Neutral Catalog # 211 E 175, 2 seconds @ 300 %

Overvoltage 3-18 Volts 4 87G, Diesel Generator Westinghouse Type N/A Current Differential SA-I, Catalog # 290B225A10 (minimum pickup 0.14 amps)

5. 32 DGT, Diesel Westinghouse Type CW, Tap: 20 Watts Generator Reverse Catalog # 289B988A17, Range Time: 3 secs @ 200 %

Power 20-120 Watts ICS Setting: 2.0 Amps Time Dial Setting: 3 6 40 DGT, Diesel GE Type CEH, "L" lead: 1.0 Generator Loss of Catalog/ #12CEH5IA4A, "H" lead: 2.5 Excitation Range: Offset: 0-4 Q, Lower no. one tap: 30 Characteristic circle diameter: Upper no. one tap: 5 5-50 0 Target: 0.2 7 27, Diesel Generator ITE Type 27D, Dropout: 100 Volts (84.1 %)

Load Sequencer Catalog # 211 R6175, Time Delay: 0.167 sees 1?.v. Ia Undervoltage (2 out of 60-110 Volts, 0.1-1.0 sees Tech Spec Allowable: 2Volts

3) sa &/It 8 27, Diesel Generator ITE Type 27H, Pickup: 110 Volts (92.5%)

Load Sequencer Catalog # 211 B0l75D0p.LMRoI 7" 1_"Special" Undervoltage 60-110 Volts

Station Catawba Nuclear Station Unit 1&2 Rev 17 Sheet __ of ,P Subject Class IE Diesel Protective Relayin; and Secuencer Undeyoltage Relay Settings File No. CNC-1381.05-00-0017 Orig By 0 : Q-1 Date V1 U/ -

By Cheke N U NDate J. CONCLUSIONS CODE # RELAY ANSI NO. & MANUFACTURER, TYPE, SETTING FUNCrTON CATALOG N, RANGE 1 50 DOT, Diesel ITE Type 50, Catalog # Tap: 6.1 Amps Generator Instantaneous 218T0641, 2-20 Amps 2 51V, Diesel Generator Westinghouse Type COV-, Tap: 5 Amps Voltage Controlled Catalog # 1876244.4-12 Amps, Trip Time: 2.05 sec @ 500 %

Over*urrent 80-100 Volts Voltage Tap: 96 Volts I Target: 0.2 Amps 3 59 DGN, Diesel IE Type 590, Tap: 3 Volts Generator Neutral Catalog# 211E1175, 2 seconds@ 300 %

Oveuvoltage 3-18 Volts 4 870, Diesel Generator Westinghouse Type N/A Current Differential SA-l, Catalog # 290B225AI0 (mi .nimumpickup 0.14 amps) 5 32 DGT, Diesel Westinghouse Type CW. Tap: 20 Watts Generator Reverse Catalog # 289B988A17, Range Time: 3 secs @ 200 %

Power 20-120 Watts [CS Stting: 2.0 Amps

_ _I Time Dial Setting: 3 6 40 DOT, Diesel GE Type CEHK "L" lead: 1.0 Generator Loss of Catalog# 12CEH5 IA4A, "H" lead: 2.5 Excitation Range: Offset: 0-4 Lower no. one tap: 30 Characteristic circle diameter: Upper no. one tap: 5 5-50 .0 Target: 0.2 7 27, Diesel Generator ITE Type 27D, Load Sequencer Catalog # 211 R6175, Undervoltage (2 out of 60-110 Volts, 0 1-1.0 secs 31 9 27, Diesel Generator ITE Type 27H, Load Sequencer Catalog# 211 !B0i75DpR0 ,7 "Special" Undervoltage 60-110 Volts I Re. -

74 0~1-* C £/.4 AM: 33 4,4 V~aN

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