ML18136A045

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Proposed Startup Test Procedure 1-ST-9,Revision 0, Voltage Profile
ML18136A045
Person / Time
Site: Surry, North Anna  Dominion icon.png
Issue date: 08/24/1979
From: Heacock D
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
Shared Package
ML18136A044 List:
References
1-ST-9, NUDOCS 7910120173
Download: ML18136A045 (15)
v • d • e


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SAFET. RELATED Page t of_-*

VIRGINIA ELECTRIC AND POWER COMPANY

~~1~-s;-_9 __

~ev i s ion No. : a Date:

STARTUP-TEST PROCEDURE FOR NORTH.MINA POWER STATION UNIT# 1 & 2 TITLE:

VOLT.AGE PROFILE Prepared By: --~~i.....;.._~,IQl,,o~-.--------------

P/WJP AC HEACOCK Date:

08-10-79 I

~gineering Recommended Approval: ~*

Date:........ s_-*_,o_-_7.;..,.r,/ ____ 4 Afl personnel ~onducting*actual testing in accordance with this procedure will verify by their signature that they have read it i_n its entirety.prior to

  • commencing any testing:

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- e D':**c:Ji'-11Ef"4T LATEST REVISION

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6.

T'EST RESULTS REV I E\\./ED BY ENG I NEER I NG:

Date: * -------

i TEST RESULTS APPROVED BY STATION NUCLEAR SAFETY AND OPERATING COMMITIEE:

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7 Cna i nnan' s Signature; Date:

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TEST-ESULTS.(Use ~dditional pag s needed).P.age*---

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DISCREPANCIES (List by number):

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CHRONOLOGICAL LOG (Use add'l page_s a-s ne~ed)

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RR.i;mIBNCES :

e VIRGINIA ELECTRIC A_Nl) POWER COMPANY NORTH ANNA POWER STATION UNIT NOS. 1 &"ill 2 VOLTAGE PROFILE

1.

Vepco Plant Manual LSK-22-2B and LSK-22-lOA

2.

F.S.A.R. Section 8.3.1.1.1

3.

Main One Line Diagram FE-lA-11

4.

1-0P-26.1, 2-0P-26.1

5.

l-EP-1, 2-EP-l

6.

Unit 1 Technical Specification

7.

Unit 2 Proposed Technical Specification 1.0 Purpose The Purpose of this test is to:

1-ST-9 Page 1 of 6 08-24-79 1.1 Verify that plant equipment voltage profiles remain above an acceptable level during a transient initiated by one unit tripping simultan~ously with a second unit starting*up: -~--.

Initials e

1-S'9 Page 2 of 6 08-24-79 2.0 Initial Conditions Date Started :

2.1 Immediately prior to the performance of this test, the test engineer has reviewed the latest revisions of the applicable references in order to improve his familiarity with this procedure and insure that it is still valid for performance of the test. (i.e. changes to the systems, equipment qr component since the procedure was approved will not affect its testing).

2.2 Unit 2 is on station service transformers and has one feedwater pump operating.

Unit 2 is operating normally with Rx power~ 30% power and H.P. and L.P. condensate heater drain pumps on recirculation.

2.3 Unit 1 is in Mode 2 or Mode 3 (on reserve station service).

2.4 VEPCO A & Chas been notified of the impending test.

2.5 Notify the Shift Supervisor for Units 1 and 2 of this impending test and coordinate its performance, through them.

2.6 All recorders and test equipment have been accepted by North Anna Quality Control Department and are in a current state of calibration.

2.7 Notify system operator at least 1 day in advance of this impending test and coordinate its performance through him.

Place the load shed logic switch in the Unit 1 startup position.

Initials

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e 3.0 Precautions l-ST-9 Page 3 of 6 08-24-79 3.1 Precautions should be taken to insure safety while making all connections to the high voltage busses.

3.2 Should the undervoltage setpoint for a piece of equipment be reached and automatic shedding does not occur, the equipment should be manually shed to prevent damage to* that equipment.

3.3 If Unit #2 is accidentially tripped during the fast transfer from Station Service to Reserve Station Service, emergency procedure 2-EP-1 should be used to restore unit to normal operating conditions.

3.4 When both units are on Station Reserve Power, it may be dif-ficult to synchronize the reserve and station busses as per 2-0P-26.1.due to the heavy loading of the Reserve Station Service Transformers. It may be necessary to manually shed non-essential Reserve Station Service loads in order to trans-.

fer the loads back to the Station Service Busses *

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Initials 4.0 Instructions 1-'9 Page 4 of 6 08-24-79 4.1 Verify that initial conditions have been met.

4.2 Install test switch to simultaneously open station service breakers 25A2, 25B2 and 25C2.

4.3 Install recorders to moniter the voltage profiles on the following busses:

4160V Bus lA 4160V Bus 2A 4160V Bus 1B 4160V Bus 2B 4160V Bus lC 4160V Bus 2C 4160V Emer. Bus 1H 4160 Emer. Bus 2H 4160V Emer. Bus lJ 4160 Emer. Bus 2J 480V Emer. Bus lJ 480V Emer. Bus 2H Control Voltage 480V Emer. Bus 2H 480V Emer. Bus lJ Control Vol tag~

125V Vital Bus 125V Vital Bus 4.4 An oscilligraph recorder has been installed by VEPCO A & C.

As specified in Attachment 6.4.

4.5 Load busses as per Attachment 6.3.

4.5.1 Record 500KV and 34.SKV Grid Voltages below.

34. 5KV" Bus //3.

SOOKV.

34. SKV Bus //4 4.6 Start all recorders and record date, time, and bus #'s.

4.7 Initiate a trip on all three Station Service breakers using the test switch.

This will simulate a trip on Unit /12.-

4. 7. l Record SOOKV and 34.SKV Grid Voltages below.
34. SKV Bus f/3 50DKV 34.SKV Bus /14

Initials e

4.0 Instructions (cont.)

1-ST-9 Page 5 of 6

  • 08-24-79 4.8 After voltages have stabilized, return Unit #2 to Station Service as per 2-0P-26.1.

. 4. 9 Turn off all recorders.

4.10 Remove recorders from their respective busses.

4.11 Remove test switch (by VEPCO A & C).

4.12 Record Data on Attachment 6.1.

4.13 Inform the Shift Supervisor of Units 1 and 2 that this test has been completed.

Completed by:

Date:

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e 5.0 Acceptance Criteria e

l-ST-9 Page 6 of 6 08-24-79 The results of this test shall be considered acceptable if:

5.1 The load from both units remains on the Reserve Station Power.

6.0 Attachments 6.1 Voltage Data Sheet 6.2 Lead Voltage Drops 6.3 Bus Loads 6.4 Installation of the Oscillograph 6.5 Safety Analysis

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VOLTAGE DATA SHEET Al WORST B2 LOWEST LEAD BUS BUS VOLTAGE VOLTAGE DROP 4KV lA 50 VOLTS 4KV lB 50 VOLTS 4KV IC SO VOLTS 4KV lH 50 VOLTS 4KV lJ 50 VOLTS 480V lH 5 VOLTS 480V lJ 5 VOLTS 25 VITAL 4KV 2A 50 VOLTS 4KV 2B SO VOLTS 4KV 2C 50 VOLTS 4KV -2H 50 VOLTS 4KV 2J SO VOLTS 480V 2H 5 VOLTS 480V 2J

.5 VOLT~

25 VITAL 1-ST-9.1 Page 1 of 1 08.;.24-79 c3 ACTUAL VOLTAGE AT LUG.

  • (A-B)
1.
  • This is the low-est voltage *1.hat the profile reaches durin'g tlie* transient.
2.

This is the worst case voltage drop for the most restrictive lead.

(See Attachment 6.2).

3.

Actual voltage is measured voltage minus the worst lead voltage drop, This number indicates the minimum voltage at the equipment.

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e LEAD VOLTAGE DROPS e

1-ST-9.2 Page 1 of 1 08-24-79 The design basis for all 4¥:v equipment is to have A voltage drop of less than 50 volts. This maximum of 50 volts is what will be used as a conservative estimate of the worst lead voltage drop.

The worst case vol_tage drops were calculated based on the impedence of the longest lead for each case and a conservatively high valve for maximum cur-rent.

Some representative voltage drops are listed below.

Reactor Coolant Pump Feedwater Pump Condensate Pump Charging Pump 30 Volts 20 Volts 15 Volts 12 Volts

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BUS 2A 2-RC-P-lA 2-CN-P-IA 2-SD-P-lA (Recirc) 2-SD-P-2A (Recirc) 480-SS-2Al & A2 BUS 2H 2-SW-P-lA.

2-CH:-P-lA 2-CC-P-lA 480 SS-2H & 2Hl e*

BUS LOADS UNIT f/:2 BUS 2B 2-RC-P-lB 2-FW-P-lBl 2-FW-P-1B2 2-BC-P-lA 2-CN-P-IB 2-SD-P-IB (Recirc) 480-SS-2Bl & B2 BUS 2J 480 SS-lJ & lJl l-ST-9.3 Page 1 of 2 08-24-79 BUS 2C 2-RC-P-lC 2-FW-P-lCl 2-FW-P-1C2; 2-CN-P-lC 2-SD-P-lC (Recirc) 2-SD-P-2B (Recirc) 480 SS 2Cl & C2 BUS 2G 2-CW-IA.

2-CW-lB 2-CW-lC 2-CW-lD 480 SS-2Gl

BUS lA 1-RC-P-lA 1-FW-P-lAl l-FW-P-1A2 1-CN-P-lA 480-SS-lAl & A2 BUS HI 480 ss-211 & 2111 BUS LOADS (cont.)

UNIT 1 BUS lB RC-P-lB 1-BC-P-lA 480 SS-lBl & B2 BUS IJ 1-SW-P-IB 1-CH-P-lB 1-CC-P-IB

  • 480 SS-lJ & lJl
  • e 1-ST-9.3 Page 2 of 2 08-24-79 BUS lC 1-RC-P-lC 480 SS-lCl & C2 BUS 2G 1-CW-lA 1-CW-lB 1-CW-lC 1-CW-ID 480 SS-2Gl

e INSTALLATION OF THE OSCILLOGRAPH Oscillograph Connection e

1-ST-9.4 Page 1 of 1 08-24-79 The oscillograph will be temporarily located in the normal switchgear room. It will be installed by A & C section Channel 1 - B phase current from 15Bl Channel 2 - B phase current from 15B2 Channel 3 - Bus potential, secondary.

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)i SAFETY ANALYSIS e

1-ST-9.5 Page 1 of 1 08-24-79

1.

REVIEW OF THE TECHNICAL SPECIFICATIONS:

The limiting conditions for operation and surveilance, requirements for the electrical power systems are stated in Unit 1 and Unit 2 proposed Technical Specifications 3/4.8.

Performance of this special test does not change the design basis.or operating procedures of the station and does not affe~t the Technical Specifications.

2~

REVIEW OF THE FINAL SAFETY ANALYSIS REPORT:

Thedesc:ri:ption and analysis of the offsite power*system.are contained in Section 8.2 of the FSAR.

Performance of this special.test does not alter any corrun.itment established in the FSAR.

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tnffiEVIEWED SAFETY QUESTION EVALUATION:

The performance o! this sp.ecial test does not create an "unreviewed safety question," as defined in 10CFR

  • 50*~59 ~
  • The special test will demon~trate plant eq~pment* vo:j.tage profiles remain above an acce~table level 4uring a transient. initiated by o~e unit tripping simuitaneously with a second unit starting up.

Thus, the special test does not:

a.** Increase the probability of occurrence or the consequences of an_

accident*or:malfuncition* of equipment important to safety previously

b.

ev~luat.ed in the safety ~nalysis report.

Create a possiblity for an accident or malfunction of a* different.-.

type than evaluated pre.viously in the safety ~nalysis.

c.

Reduce the margin of safety as defined in the basis for any technical spec1:fication.

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