ML20149E333

Monthly Operating Repts for June 1997 for SONGS

ML20149E333
Person / Time
Site:	San Onofre
Issue date:	06/30/1997
From:	Gibson G, Williams C SOUTHERN CALIFORNIA EDISON CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9707180170
Download: ML20149E333 (9)

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e 5001111 RN CAIIIORNIA EDISON An unson ixiiassriorat came.ny .

t July 11,'1997 F

U. S. Nuclear Regulatory Commission

' Document Control Desk-Washington, D.C. 20555 .

' Gentlemen:

Subject:

- Docket Nos. 50-361 and 50-362 .

-i Monthly Operating Reports for June 1997 San Onofre Nuclear Generating Station, Units 2 and 3 Technical Specification 5.7.1.4 of Facility Operating Licenses NPF-10 and NPF-15 for the San Onofre Nuclear Generating Station, Units 2 and 3, respectively, requires

. Edison to provide a Monthly Operating Report (MOR) of operating statistics and shutdown experience, including documentation of all challenges to pressurizer safety valves, for each unit. Enclosures 1 and 2 provide the June 1997 Monthly Operating Reports for Units 2 and 3, respectively. There were no challenges to pressurizer safety

. valves for either Unit 2 or 3.

If you have any' questions, please contact Mr. C. E. Williams at (714) 368-6707.

Sincerely, l

~@[ Gregory T. Gibson <

Manager, Compliance

. Enclosures cc: E. W.- Merschoff, Regional Administrator, NRC Region IV

, K. E. Perkins, Jr., Director, Walnut Creek Field Office, NRC Region IV J. A. Sloan, NRC Senior Resident inspector, San Onofre Units 2 & 3 M. B. Fields, NRC Project Manager, San Onofre Units 2 & 3

'9707190170 970630 %

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P. O,ihn 128 San Cimvyae, CA 92674 0128 '

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Enclosure 1

NRC Monthly Operating Report, June 1997 San Onofre Nuclear Generating Station, Unit 2 i-i' -

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USNRC MONTHLY OPERATING REPORT Docket No: 50-361

, SAN ONOFRE NUCLEAR GENERATING STATION Unit Name: SONGS-2 UNIT 2 Date: July 111997 June 1997 Completed by: C. E. Williams Telephone: (714) 368-6707 Page 1 of 3

, l OPERATING DATA REPORT L11  : Design Electrical Rating (Not MWe))! -

By [1070s 2 Maximum Dependable Capacity (Gross MWe) 1127 73i -Maximum Dependable _Capaciti (Not MWe)n - . 11070?

This Month Yr-to-Date Cumulative f4/ . Number of Hours Reactor Was Critical; 16881< s2,205) , ;iS3,6103 5 Hours Generator On-line 688 2,150 91,997

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6$ Unit Reserve Shutdown Hours (

, y10 0) 3 (0,03 10.0ji ~

7 Net Electrical Energy Generated (MWh) 740,346 2,275,375 96,866,45 l

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USNRC MONTHLY OPERATING REPORT Docket No: 50-361

SONGS-2 E AN ONOFRE NUCLEAR GENERATING STATION Unit Name:

UNIT 2 Date: July 11 1997 June 1997 Completed by: C. E Williams Telephone: (714) 368-6707 Page 2 of 3 SHUTDOWNS AND POWER REDUCTIONS 5, ' M02i !W Numbere 96

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Date June 29,1997

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• Type ~(1);.; tE M <

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WF?(Escsd)i[ s Duration (1) 32.2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> l Reason (2)1 s :2A(Equip? Failure)1 .

Method of shutting down reactor (3) 2

.LER No#

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> g2;97p0103 System Code (4) CB 4

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Component Code'(5)) i '

e Charging check valve MUO21 was stuck closed due to design defect. Valve Cause and corrective action to prevent recurrence replaced with a valve without design j defect. l l

l (1) F-Forced l S-Sches, led l (2) Reason: A Equipment Failure (Explain)

B-Meintenance or Test C-Refueling D-Regulatory Restriction E-Operator Training & Ucense Examination F-Administrative G-Operational Error (Explain)

H-Other (Explah)

(3) Method. 1-Manual 2 Manual Scram 3-Automatic Scram 4-Continuation from Previous Month 5-Reduction in the Average Daily Power Level of more than 20% from the previous day 6-Other (Explain)

(4)IEEE Std 805-1984 (5)IEEE Std 803A 1983

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• USNRC MONTHLY OPERATING REPORT Docket No: 50-361

, SAN ONOFRE NUCLEAR GENERATING STATION Unit Name: SONGS-2 UNIT 2 Date: July 111997 June 1997 Completed by: C. E. Williams Telephone: (714) 368-6707 Page 3 of 3

SUMMARY

OF OPERATING EXPERIENCE FOR THE MONTH Date Time Event 6/1/9?j '000 { Msd.e)1[99.8(Psast6f power /d158 MWi[60l0 EFPDi *' -

Unit entered 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> Technical Specification shutdown action per 3.5.2.A.

6/26/97 1413 ECCS charging line loop 2A check valve S21201MUO21 will not pass required flow.

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"4 Started reactor down power to.90% to place the unit.;within the licensing 3g

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basis of the SBl.OCA analysis 3 .

1630 Unit at 90% reactor power, approximately 1010 MWe.

Testing ofpa@ng de@aye M@cajespalve.is sW g 6/29/97? ';1102;' Commenced plant shutdown at>15% per houra Exited 72-hour action statement of Tech. Spec. 3.5.2.A and entered Action B 1413 of Tech. Spec. 3.5.2. ,

. [1534) Trippsd niair{tortine? 1 g 1548 Tripped reactor, Unit entered Mode 3.

,  ?!? L231?i- lEntirsd .M6de karidexitedjhutdown';astisN 3[5(24fA(;shargirigIcheckhl9el 6/30/97 0844 Unit entered Mode 5.

- . Unit in. Mode 5g123 degrees Ec350 sta; preparations in progress to drain to; i

mid-looo~to repair'ch'aroirid check Ya vs MUO21?

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Enclosure 2 NRC Monthly Operating Report, June 1997 San Onofre Nuclear Generating Station, Unit 3 I

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USNRC MONTHLY OPERATING REPORT Docket No: 50-362

. SAN ~ONOFRE NUCLEAR GENERATING STATION Unit Name: SONGS-3 UNIT 3 Date: July 1997 June 1997 Completed by: C. E. Williams Telephone: (714) 368-6707 Page 1 of 3

.f OPERATING DATA REPORT 51;! Design Electrical Rating (Net MWe)) ~ ^ ,

11080) 2 Maximum Dependable Capacity (Gross MWe) 1127

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23? Maximum Dependable ~ Capacity;(Net MWe)6 61080)

This Month Yr-to-Date Cumulative 04 . Number of Hours Reactor Was Critical) 404, - $2l424P 192l716V 5 Hours Generator On-line 0 2,424 90,958 563 Unit Reserve Shutdown HoursJ [0,01 , 30.0i ?io.0J 7 Net Electrical Energy Generated (MWh) (12,830) 2,576,729 94,354,740 l

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USNRC MONTHLY OPERATING REPORT Docket No: 50-362 SAN ONOFRE NUCLEAR GENERATING STATION Unit Name. SONGS-3 U::JIT 3 Date: July 1997 Ane 1997 Completed by: C. E. Williams Telephone: (714) 368-6707 Page 2 of 3 UNIT SHUTDOWNS AND POWER REDUCTIONS

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Number je3P 4 - x Date April 12,1997

Type'(1)! ,

g; }S(Scheduled)j 720 Duration (Hours)

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!!C(Refueling));

i iReason (2)P% _

Method of shutting down reactor (3) 4 (Continuation)

LER No.9 ,.

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!#M System Code (4) N/A Componont Code;(5)( > ~ jN/As  ;

Cause and corrective action to prevent recurrence N/A l

l (1) F-Forced S-Scheduled (2) Reason: A-Equipment Failure (Explain)

B-Maintenance or Test l C-Refueling D-Regulatory Restricton E-Operator Training & License Examination l F.Administratrve G-Operatonal Error (Explair:)

H-Other (Explain)

(3) Method. 1-Manual 2-Manual Scram 3-Automate Scram

4. Continuation from Previous Month 5-Reduction in the Average Daily Power Level of more than 20% from the previous day

&Other (Explain)

I (4)lEEE Std 805-1964 (5)IEEE Std 803A-1983 l

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USNRC MONTHLY OPERATING REPORT Docket No: 50-362

, SAN ONOFRE NUCLEAR GENERATING STATION Unit Name: SONGS-3 UNIT 3 Date: July 1997 June 1997 Completed by: C. E. Williams Telephone: (714) 368-6707

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SUMMARY

OF OPERATING EXPERIENCE FOR THE MONTH

, Date Time Event Mi;.D  ; Unit 3 in Mode 5; 93 degrees Fr atmospheric pressuregESEtegingjnji ,

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progress, day ~49 of a planned 75 day outage in progress 3 m *,

6/14/97 0217 Entered Mode 4.

6/15/97j L1820;; LEntersd Mode 37 f.

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6/18/97 2034 Initiated RCS cooldown and depressurization to repair CEA 91.

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- @ L235n ; Entered MedsM

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yg;3i 2340 Entered Mode 5.

6/22/97{ .l0203) Entered M6de 63 >

?! ,?,'  ; gf g 2 6/23/97 2343 Removed CEA 91 6/24/97} d634! Nsw CEA91l Installed.i M '

6/26/97 0247 Entered Mode 5.

6/27/97} lD2'1'5: :.sfas' Commenced. making preparations to drain Unit 3 RCS to mid-loop"for

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rgWadialve S31201MUO21T '

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Unit in Mode 5,95 degrees F, RCS drained to mid-loop for repair of charging 6/30/97 2400 check valve S31201MUO21.

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