ML17306A258

Monthly Operating Repts for Oct 1991 for Palo Verde Units 1, 2 & 3.W/911115 Ltr

ML17306A258
Person / Time
Site:	Palo Verde
Issue date:	10/31/1991
From:	Chavet K, James M. Levine ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
254-01788-JML-K, 254-1788-JML-K, NUDOCS 9111190004
Download: ML17306A258 (29)

Text

REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:911 1190004 DOC.DATE:

FACIL:STN-50-528 Palo Verde Nuclear Station, SR~~ Unit NOTARIZED: NO 1, Arizona DOCKET Publi 05000528 STN-50-529 Palo Verde Nuclear Station, Unit 2, Arizona Publi 05000529 STN-50-530 Palo Verde Nuclear Station, Unit 3, Arizona Publi 05000530 AUTH. NAME AUTHOR AFFILIATION CHAVET,K.A. Arizona Public Service Co. (formerly Arizona Nuclear Power LEVINE,J.M. Arizona Public Service Co. (formerly Arizona Nuclear Power RECIP.NAME RECIPIENT AFFILIATION D

SUBJECT:

Monthly para repts for Oct 1991 for Palo Verde Units 1, 2 6 3 911115 DISTRIBUTION CODE: IE24D COPIES RECEIVED: LTR I ENCL 3 SIZE:

TITLE: Monthly Operating Report (per Tech Specs)

NOTES:STANDARDIZED PLANT 05000528 Standardized plant. 05000529 Standardized plant.

1 05000530 D

RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD5 LA 3 3 PD5 PD 1 1 TRAMMELL,C 1 1 THOMPSON,M 1 1 INTERNAL: ACRS 10 10 AEOD/DOA 1 1 AEOD/DS P/TPAB 1 1 NRR/DLPQ/LPEB10 1 1 NRR/DOEA/OEAB RGN5 1

1 1

1 EG~ 1 1 EXTERNAL: EG&G BRYCE,J.H 1 1 NRC PDR 1 1 NSIC 1 1 NOTES: 1 1 D

D D

NOTE TO ALL "RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM Pl-37 (EXT. 20079) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!

TOTAL NUMBER OF COPIES REQUIRED: LTTR 26 ENCL 26

Arizona Public Service Company PALO VERDE NUCLEAR GENERATING STATION P.O. BOX 52034 ~ PHOENIX, ARIZONA85072-2034 JAMES M. LEVINE VICE PRESIDENT 254-01788-JML/KAC NUCLEAR PRODUCTION November 15, 1991 Docket Nos. STN 50-528/529/530 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Mail Station P1-37 Washington, D.C. 20555

Subject:

Palo Verde Nuclear, Generating Station (PVNGS)

Units 1, 2, and 3 Monthly Operating Reports for October 1991 File: 91-024-404; 91-056-026 Attached are the Monthly Operating Reports for October 1991, prepared and submitted pursuant, to Specification 6.9.1.6 of Appendix A (Technical Specifications) to the PVNGS Units 1, 2, and 3 Operating Licenses. By copy of this letter, we are also forwarding the Monthly Operating Reports to the Regional Administrator of the Region V Office.

If you 340-4718.

have any questions, please contact Mr. Kent A. Chavet, at (602)

Very truly yours, JML/KAC/kac Attachments CC: J. B. Martin (all w/attachments)

D. H. Coe A. C. Gehr A. H. Gutterman INPO Records Center Utility Data Institute

~BOC2{i

-911-1190004 911031 PDR ADOCK 05000528 R - PDR

l 4

NRC MONTHLY OPERATING REPORT DOCKET NO. 50-528 UNIT NAME PVNGS-1 DATE COMPLETED BY K.A. Chavet OPERATING STATUS

l. Unit Name: Palo Verde Nuclear Generatin Station Unit 1

2. Reporting Period: October 1991

3. Licensed Thermal Power (MWt): 3800

4. Nameplate Rating (Gross MWe): 1403

5. Design Electrical Rating (Net MWe): 1270

6. Maximum Dependable Capacity (Gross MWe): 1303

7. Maximum Dependable Capacity (Net MWe): 1221

8. If Changes Occur In Capacity Ratings (Item Numbers 3 Through 7)

Since Last Report, Give Reasons: N A

9. Power Level to Which Restricted, If Any (Net MWe): None

10. Reasons For Restrictions, If Any: A h':"Zr'g':::-:.

$ a,'-.'.:Dat,"'e:::,;",:,-';Fr:.,";~:.;::CuYnul~atkyk'J:;,:':.

744 7,296 50,472 12.::.'::,::,:Ho'ur's'::;::Re ac.t'a:i::,".','@as::::::,;.Cr'i:tweak;:>:,-,".;;:',!::,'::::',,:",~:,"':,".',!::i 650.6 6,134.9 27,595.1 13:::,NReactoi':;,";:Rv'sexv'e>::,8hi'itd'oQxs:.Hours".":.N::!8.":.'4l ."':: ':.>> 0.0 0.0 0.0 639.2 6,104.5 26,858.1

.':,'::";:,Un'it'.:;:R'e's'erve,';:,'Shut'8'own";":',Hour%,:,::::',~$ ';:h g';,::,::;;:,':,l!!j%m'j<j>'"~ 0.0 0.0 0.0

16.  :'!".::;::'Gr'o's's'.,':,::;.:Th'erma;1;::,Bn~er'." 22,947,275 98,341,376

,':,'.':-,:,:,Gro'ss,':-:'.:El'i$ er'..i'c'al,:::'8'ner@'i",."Ci'rierat'ed,';(HWH) 824,000 7,959,800 34,132,400 hajj'rl":.(j')'"":gg) 18.,':::.::.',.Net'::.,::,.Elec'tr'3,;iP'1:,,:;En'e'i'~;,.Cen'ei'ii;e8; 773 277 7,498,352 32,011,004

]9 ~::" jjnjig'.":::.S'ervice'::"-'Hate " @"~'i'gx'mj@gj j)jp'~~mm 85.9% 83.7% 53.2S 20  ::;.',-.VV'gij'Alai'3)~ah'Slimy,'::iFa'o'Col.".j('p');:,:",',~jg':-,:. 85.9S 83.7% 53.2s 21 ,":j'.:Va'i,;':ti:-":Cajun'a'a'.i;ty,.'-'5,'ac'to'rg" (Vh,::inj'.;)HDC.">',"::.,8P.t!)gj'j;";::;: ~ 84.2% 51.9%

22  !:-:::>V6i'O-..'.-:C'a'paci tyg>Fac'torC:::(Us'1'I'ig~! DER'40et)'Qj>p!~':::;:/; 81.8% 80.9% 49.9s 23  :,;:',':,:.Vnil:;:>Porc8dgiOu tag '~, Ra te>,',,:(ll);:>,;..,"'j";;,.>~i>>i'ji<ppg~~;;> 0.0% 1.9a 20.9%

24. Shutdowns Scheduled Over Next 6 Months (Type, Date and Duration of Each): Refuelin outa e Februar 1 199 0 da s

25. If Shutdown At End of Report Period, Estimated Date of Start-up: N A Forecast Achieved INITIAL CRITICALITY ~05 85 05/525 85 INITIAL ELECTRICITY ~06 85 06/610 85 COMMERCIAL OPERATION ~11 85 01/128 86 1

AVERAGE DAILY UNIT POWER LEVEL UNIT NAME PVNGS-1 DATE COMPLETED BY K A Chavet MONTH: October 1991 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL 1236 17 1236 123 18 1235 123 19 1234 1236 20 1235 1234 21 1228 1238 22 120 991 23 1199 1192 24 1189 1239 25 1246 10 1238 26 1249 1238 27 382 12 1238 28 13 1244 29 14 1235 30 15 1229 31 16 2

Pl REFUELING INFORMATION DOCKET NO. 50-528 UNIT NAME PVNGS-1 DATE COMPLETED BY K.A Chavet Scheduled date for next refueling shutdown.

02/01/92, 3rd refueling Scheduled date for restart following refueling.

04/11/92 Will refueling or resumption of operation thereafter require a Technical Specification change or other license amendment'?

Yes. Figures 3.2-2 and 3.2-2A of the Technical Specifications will require revision to reflect different DNBR margin limits.

Scheduled date for submitting proposed licensing action and supporting information.

12/2/91 Important Licensing considerations associated with refueling, 'e.g., new or different fuel design or supplier, unreviewed design or performance analysis methods, significant changes in fuel design, and new operating procedures.

The U1C4 reload analysis has been performed by ABB-CE using methodology from Topical Report CENPD-266-P-A, with revisions to biases and uncertainties for both the ROCS-NEM computer code and the net rod worth (N-1) calculation to include more recent measurements in the data base.

The number of fuel assemblies.

a) In the core. 241 b) In the spent fuel storage pool. 188 Licensed spent fuel storage capacity. 1329 Intended change in spent fuel storage capacity. None Projected date of last refueling that can be discharged to spent fuel storage pool assuming present capacity.

2004 (18 Month reloads and full core discharge capability).

3

SUMMARY

OF OPERATING EXPERIENCE FOR THE MONTH DOCKET NO. 50-528 UNIT NAME PVNGS-1 DATE COMPLETED BY K.A. Chavet October 1991 10/01 0000 Unit began the month in Mode 1, 100% RX power.

10/07 0903 Commenced RX power decrease to 65% due to Feedwater Pump Turbine valve problems. 'A'heck 10/07 1050 RX power at 65%.

10/07 2315 Commenced RX power increase to 100%.

10/08 0615 RX power at 100%.

1.0/27 0722 Entered Mode .3 when the RX/turbine tripped as a result of a lightning-induced fault on a grid secondary feeder. A momentary power load unbalance caused fast closure of two main turbine control valves. The resultant change in steam flow caused Quick Open signals to the steam bypass control valves. The main turbine control valves then reopened, which combined with the steam bypass control valves being open, decreased primary temperature. The power increase associated with the decreased temperature caused a reactor trip on Variable Over-Power.

In addition, Safety Injection Actuation Signals (SIAS) and Containment Isolation Actuation System (CIAS) actuated due to low pressurizer pressure.

10/27 0729 Declared NUE due to SIAS.

10/27 0905 Terminated NUE.

10/31 0444 Entered Mode 2.

LO/31 1237 Entered Mode 1.

10/3L 1608 Main Generator Synchronized to the'rid.

10/31 2400 Ended the month in Mode 1, ascending to 100% RX power.

4

SHUTDOWNS AND POWER REDUCTIONS October 1991 DOCKET NO 50-528 UNIT NAME PVNGS-I DATE COMPLETED BY K.A. Chavet No. Date Type Outage Duration Hours Reason Method Shutting Down of Reactor LER No.

Code'ause System Component Code~

and Corrective Action to Prevent Recurrence 91/04 10/07/91 F N/A N/A N/A N/A RX power decreased to 6 due to problems with a check valve on Feedwater Pump Turbine 'A'.

91/05 10/27/91 F 104.8 N/A N/A N/A RX/turbine trip due to momentary power load unbalance from lightning induced fault. (Details on previous page)

~F- Forced ~Reason: ~Method: 4Exhibit F-Instructions S-Scheduled A-Equipment Failure(Explain) 1-Manual for Preparation of the Data B-Maintenance or Test 2-Manual Scram Entry Sheets for Licensee C-Refueling 3-Automatic Scram Event Report (LER) File D-Regulatory Restriction 4-Continuation from (NUREG 0161)

E-Operator Training & License Previous Month Examination 5-Reduction of 20$ or F-Administrative Greater in the Past ~Exhibit H-Same Source G-Operational Error 24 Hours H-Other (Explain) 9-Other-(Explain)

AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-529 UNIT NAME PVNGS-2 DATE COMPLETED BY K A. Chavet MONTH: October 1991 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL 1 48 17 1250 18 1250 19 1248 20 1248 21 1251 22 1250 23 1225 24 1226 25 10 1249 26 1248 27 12 1249 28 13 1248 29 14 1266 30 15 1316 31 16 1288 7

REFUELING INFORMATION DOCKET NO. 50-529 UNIT NAME PVNGS-2 DATE COMPLETED BY K.A. Chavet Scheduled date for next r'efueling shutdown.

Unit was shut down on 10/17/91 for refueling.

Scheduled date for restart following refueling.

12/26/91 Will refueling or resumption of operation thereafter require a Technical Specification change or other license amendment?

No. Analyses indicate that no proposed Technical Specification change or other license amendment will be required as a result of the next refueling.

4. Scheduled date for submitting proposed licensing action and supporting information.

N/A Important Licensing considerations associated with refueling e.g., new or different fuel design or supplier, unreviewed design or performance analysis methods, significant changes in fuel design, and new operating procedures.

U2C4 is typical of PVNGS reload cycles.

The number of fuel assemblies.

a) In the core. 241 b) In the spent fuel storage pool. 204 Licensed spent fuel storage capacity. 1329 Intended change in spent fuel storage capacity. None Projected date of last refueling that can be discharged to spent fuel storage pool assuming present capacity.

2004 (18 Month reloads and full core discharge capability).

The figures in 6.a and 6.b reflect fuel assembly locations at the beginning of the month.

At the end of the month, the reactor was in the process of being defueled in accordance with the PVNGS refueling procedure.

8

SUMMARY

OF OPERATING EXPERIENCE FOR THE MONTH DOCKET NO. 50-529 UNIT NAME PVNGS-2 DATE COMPLETED BY K.A. Chavet October 1991 10/01 0000 Unit began the month in Mode 1, 100% RX power.

10/16 2100 Commenced RX power decrease for refueling outage.

10/17 0103 Entered Mode 3 when RX was manually tripped from 20% to begin refueling outage.

10/17 1253 Entered Mode 4.

10/17 2107 Entered Mode 5.

10/23 1256 Entered Mode 6.

10/31 2400 Unit ended the month in Mode 6 with the reactor partially defueled.

9

SHUTDOWNS AND POWER REDUCTIONS October 1991 DOCKET NO 50-529 UNIT NAME PVNGS-2 DATE COMPLETED BY K.A. Chavet No. Date Type Outage Duration Hours Reason Method Shutting Down of Reactor LER No.

Code'ause System Component Code~

and Corrective Action to Prevent Recurrence 91-06 10/17/91 S 359.0 N/A N/A N/A Unit shut down scheduled 70 day refueling outage.

~F- Forced ~Reason: ~Method: 4Exhibit F-Instructions S-Scheduled A-Equipment Failure(Explain) 1-Manual for Preparation of the Data B-Maintenance or Test 2-Manual Scram Entry Sheets for Licensee C-Refueling 3-Automatic Scram Event Report (LER) File D-Regulatory Restriction 4-Continuation from (NUREG 0161)

E-Operator Training & License Previous Month Examination 5-Reduction of 20% or F-Administrative Greater in the Past ~Exhibit H-Same Source G-Operational Error 24 Hours H-Other (Explain) 9-Other-(Explain) 10-

t NRC MONTHLY OPERATING REPORT t

DOCKET NO. 50-530 UNIT NAME PVNGS-3 DATE COMPLETED BY K.A. Chavet OPERATING STATUS

1. Unit Name: Palo Verde Nuclear Generatin Station Unit 3

2. Reporting Period: October 1991

3. Licensed Thermal Power (MWt): 3800

4. Nameplate Rating (Gross MWe): 1403

5. Design Electrical Rating (Net MWe): 1270

6. Maximum Dependable Capacity (Gross MWe): 1303

7. Maximum Dependable Capacity (Net MWe): 1221

8. If Changes Occur In Capacity Ratings (Item Numbers 3 Through 7)

Since Last Report, Give Reasons: N A

9. Power Level to Which Restricted, If Any (Net MWe): None

10. Reasons For Restrictions, If Any: N A (8'38Th'i sg".,M'onth':.:;ij" 8j~"::::::,',i'Cjimulat':iv'e':'.:.".',.';:."...,.'.'..

744 7,296 33,432 663.3 5,226.5 22,806.2 13 0.0 0.0 0.0

';.".':;Hours:::.:: 647.9 5,112.6 22,435.8 15 Unit ""R8e'8'e'tv'"'.::Sh8u td6w'n"'::::8'o8ur 0.0 0.0 0.0

.::,;,Gr'OSF::;;Th'er'iiial-:. BneX'gj:::;,gk'n'er'a.Led,::8:',,(tiN)2),:8:::..:~:;;::,':::;:.:;:.:;::g 2,418,423 18,635,791 82,242,018 17 ';.,:::Gi'~'ss.".: Bleciiical;:::,En'eig'y,,".',,::.,'Cherie'x~pt'id",:;:(Mt&),"',':;; 846,600 6,511,400 28,819,700 18 '";.N'e':,tiaEle'ct'r'Xe~'1,"::i'Bnerg j".; 795,134 6,117,547 27,117,022 19 ,j):Un%i:88ex'vice,.':'.;:Pac'2to.L";:,"2,('P),:;ij:."",.;i ".::,:'"~~2:,!'i7!:,;"'.g>',:,.ll::".;:>$8',.2,,)> 87.1a 70.1s 67.1%

20 '.28Unit~hvailabila.ty 'Faccor- (%.)<< 8-8 ~~ 8'i"-8q 87.1s 70. 1% 67.1s

21.  :;:',"'.xiii.'e':..'..'Cij'aiity~Pactoi;'::,.;'.t:Vi': 87.5s 68.7a 66.4S 22 "'4Qjfit '7a>>pa'c8:it j~'"'Fac to8 ji":.~(Qsin8'"'"'Qgg,'"jge8')g>> 84.2a 66.0% 63.9s 23 j:8VLll!t...;Pox,cedqOu 0'8'-"::le'4e!.;. (%)p.::;~j'j::2,': j',,':.,::,'4~qg;.:~g':) 0.0a 6.2e 8.2s

25. If Shutdown At End of Report Period, Estimated Date of Start-up: N A Forecast Achieved INITIAL CRITICALITY ~07 87 25 87 INITIAL ELECTRICITY 07787 09 87 ll

~10 01 08 8 87 88 COMMERCIAL OPERATION 11

AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-530 UNIT NAME PVNGS-3 DATE COMPLETED BY K.A Chavet MONTH: October 1991 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL 1214 125 1208 18 1259 1210 19 1262 2 3 20 1 64 1263 21 1258 1262 22 1255 1262 23 1258 1264 24 1260 1262 25 1265 10 1261 26 1268 1262 27 388 12 1261 28 13 1262 29 14 1264 30 1266 31 184 16 1264

REFUELING INFORMATION DOCKET NO. 50-530 UNIT NAME PVNGS-3 DATE COMPLETED BY K A. Chavet Scheduled date for next refueling shutdown.

09/15/92, 3rd refueling Scheduled date for restart following refueling.

11/14/92 Will refueling or resumption of operation thereafter require a Technical Specification change or other license amendment?

The need for a Technical Specification change or other license amendment has not yet been determined.

Scheduled date for submitting proposed licensing action and supporting information.

N/A Important Licensing considerations associated with refueling, e.g., new or different fuel design or supplier, unreviewed design or performance analysis methods, significant changes in fuel design, and new operating procedures.

A Technical Specification change request will be submitted to the NRC which will allow the use of advanced zircaloy-based cladding alloys instead of Zircaloy-4 on up to 80 fuel rods in two fuel assemblies.

The number of fuel assemblies.

a) In the core. 241 b) In the spent fuel storage pool. 192 Licensed spent fuel storage capacity. 1329 Intended change in spent fuel storage capacity. None Projected date of last refueling that can be discharged to spent fuel storage pool assuming present capacity.

2005 (18 Month reloads and full core discharge capability).

13

'I t t

SUMMARY

OF OPERATING EXPERIENCE FOR THE MONTH UNIT NAME PVNGS-3 COMPLETED BY K.A Chavet October 1991 10/01 0000 Unit began the month in Mode 1, 100% RX power.

10/27 0722 Entered Mode 3 when the RX/turbine tripped as a result of a lightning-induced fault on a grid secondary feeder. A momentary power load unbalance caused fast closure of all four main turbine control valves.

The resultant change in steam flow caused Quick Open signals to the steam bypass control valves and a Reactor Power Cutback. The main turbine control valves then reopened, which combined with the steam bypass control valves being open, decreased primary temperature. The power increase associated with the decreased temperature caused a reactor trip on Variable Over-Power. In addition, Safety Injection Actuation Signals (SIAS) and Containment Isolation Actuation System (CIAS) actuated due to low pressurizer pressure.

10/27 0729 Declared NUE due to SIAS.

10/27 0905 Terminated NUE.

10/30 1604 Entered Mode 2.

10/30 2103 Entered Mode l.

10/31 0728 Main generator synchronized to the grid.

10/31 2400 Ended the month in Mode 1, 50% RX power.

14

SHUTDOWNS AND POWER REDUCTIONS October 1991 DOCKET NO 50-530 UNIT NAME PVNGS-3 DATE COMPLETED BY K.A. Chavet No. Date Type Outage Duration Hours Reason Method Shutting Down of Reactor LER No.

Code'ause System Component Code~

and Corrective Action to Prevent Recurrence 91/08 10/27/91 F 96.1 H N/A N/A N/A RX/turbine trip due momentary power load unbalance from lightning induced fault. (Details on perevious page)

~F-Forced ~Reason: 3Me thod: 4Exhibit F-Instructions S-Scheduled A-Equipment Failure(Explain) 1-Manual for Preparation of the Data B-Maintenance or Test 2-Manual Scram Entry Sheets for Licensee C-Refueling 3-Automatic Scram Event Report (LER) File D-Regulatory Restriction 4.-Continuation from (NUREG 0161)

E-Operator Training & License Previous Month Examination 5-Reduction of 20% or F-Administrative Greater in the Past ~Exhibit H-Same Source G-Operational Error 24 Hours H-Other (Explain) 9-Other-(Explain) 15

'