ML20202J023

Monthly Operating Repts for Mar 1986

ML20202J023
Person / Time
Site:	Dresden
Issue date:	03/31/1986
From:	Maxwell D, Scott D COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF ADMINISTRATION (ADM), NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
References
86-236, NUDOCS 8604150513
Download: ML20202J023 (23)

Text

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OPERATING DATA REPORT o

DOCKET NO. 050-237 DATE April 1, 1986 COMPLETED BY D. C. Maxwell TELEPHONE 815/942-2920 OPERATING STATUS NOTES 1.

Unit Name:

Dresden II 2.

Reporting Period:

March, 1986 3.

Licensed Thermal Power (MWt):

2.527 4.

Nameplate Rating (Gross MWe):

828 5

Design Electrical Rating (Net NWe):

794 6.

Maximum Dependable Capacity (Gross MWe):

812 7.

Maximum Dependable Capacity (Net MWe):

772 8.

If Changes Occur in Capacity Ratings (items 3 Through 7) Since Last Report, Give Reasons:

N/A 9

Power Level to Which Restricted, if Any (Net MWe): N/A 10.

Reasons For Restrictions, if Any:

N/A This Month Yr-to-Date Cumulative 11.

Hours in Reporting Period 744 2,160 139,224 12.

Number of Hours Reactor Was Critical 744,0 2,067.2 105,764.7 13 Reactor Reserve Shutdown Hours 0

0 u

14.

Hours Generator On-Line 744.0 1,867.2 100,851.7 15.

Unit Reserve Shutdown Hours 0

0 0

16.

Gross Thermal Energy Generated (MWM) 1,771,120 4,355,325 205,988,964 17.

Gross Electrical Energy Generated (MWH) 578,557 1,420,975 65,920,138 18.

Het Electrical Energy Generated-(MWH) 552,989 1,355,249 62,291,363 19 Unit Service Factor 100.0 86.4

~

72.4 20.

Unit Availability Factor 21.

Unit Capacity Factor (Using MDC Net).

100.0 86.4 72.4 96.3 81.3 58.0 22.

Unit Capacity Factor (Using DER Net) 93.6 79.0 56.3 23.

Unit Forced Outage Rate 0

13.6 12.3 24.

Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each):

Mid-May for a weekend snubber inspection.

25.

If Shut Down At End Of Report Period, Estimated Date of Startup:

N/A 8604150513 860331 PDR ADOCK 05000237 R

PDR

OPERATING DATA REPORT DOCKET NO. 050-249 DATE April 1,1986 COMPLETED BY D. C. hbxwell TELEPHONE 815/942-2920 OPERATING STATUS NOTES 1.

Unit Name: Dresden III 2.

Reporting Period:

March, 1986 3

Licensed Thermal Power (MWt):

2 527 4.

Nameplate Rating (Gross NWe):

R9R 5

Design Electrical Rating (Net MWe): 794 6.

Maximum Dependable Capacity (Gross MWe): R12 7

Maximum Dependable Capacity (Net MWe):

773 8.

If Changes Occur in Capacity P.atings (items 3 Through 7) Since Last Report, Give Reasons:

N/A 9

Power Level to Which Restricted, if Any (Net MWe): N/A 10.

j Reasons For Restrictions, if Any: N/A i

a This Month Yr-to-Date Cumu.l.a t ive.

11.

Hours in Reporting Period 744 2,160 128,809 12.

Number of Hours Reactor Was Critical 0

0 96,596.7 13 Reactor Reserve Shutdown Hours 0

0 0

14.

Hours Generator On-Line 0

0 89,793.3 15.

Unit Reserva. Shutdown Hours 0

0 0

16.

Gross Thermal Energy Generated (MWH) 0 0

181,772,636 17 Gross Electrical Energy Generated (MWH) 0 0

58,839,233 i

18.

Net Electrical Energy Generated.(MWH)

-4,781

-14,715

""557'11,579

/

19 Unit Service Factor 0

0 69.7 20.

Unit Availability Factor 0

0 69.7 21.

Unit Capacity Factor (Using MDC Net) 0 0

56.0 22.

Unit Capacity Factor (Using DER Net) 0 0

54.5-23.

Unit Forced Outage Rate 0

0 12.4

~24.

Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each):

In 9th Refueling /RPR outage.

25 If Shut Down At End Of Report Period, Estimated Date of Startup:

June, 1986 I

,,----.-..,n.

...--,--n-,-..,,..

,, -,,,. - -,, - + - -.. -

t AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 050-237 UNIT II DATE April 1, 1986 COMPLETED BY D. C. Maxwell TELEPHONE 815/942-2920 MONTH March, 1986 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net)

(MWe-Net) 1 778 17 794 2

779 18 787 3

787 19 707 4

794 20 789 5

790 21 792 6

671 22 784 7

567 23 719' 8

382 24 787 9

692 25 778 10 780 26 779 11 783 27 772 12 789 28 783 i

13 790 29 698 14

-789 30 648 15 793 31 7L2 16 756 n

I

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AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 050-249 4

UNIT III DATE April 1, 1986 COMPLETED BY D. C. Maxwell TELEPHONE 815/942-2920 MONTH March, 1986 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net)

(MWe-Net) 1 0

17 0

2 0

18 0

3 0

19 0

4 0

20 0

5 0

21 0

6 0

22 0

7 0

23 0

8 0

24 0

9 0

25 0

10 0

26 0

11 0

27 0

12 0

28 0

13 0

29 0

14 0

30 0

15 0

31 0

16 0

... ~

COMMONWEALTH EDISON COMPANY-1 DRESDEN STATION l

NEXIMUM DAILY LOAD 4

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MONTH OF March. 1986 HOUR MAXIMUM DAILY LOAD DAY ENDING KW l

1 2200 826,500 2

0100 826,000 3

1600 826,700 4

1500 829,400 5

1200 827,300 6

0200 827,200 7

1300 656,000 t

8 0400 648,800 9

2900 815,900 10 1500 824,000 I

11

- 1200 825,900 12 1200 825,200 13 2100 827,000 14 0200 826,700 15 0600 826,700 16 1900 828,000 17 0100 826,000 t

i 18 1300 826,900 19 2400 810,500 1

20 1600 824,300 21 1300 823,500 22 1600 817,300 23 0100 793,200 1

1 24 1500 821,900~

f 25 1300 824,900 26 0100 818,400 27 0200 820,200 28 0900 810,200 29 0100 795,000 30 0200 786,900 31 2200 801,700

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,. _ _ _..._._ ~.. _. _,,, _.. _ _ _ _.., _ _ _. _... _ _. _. _,... _ _., _.....,,.

DOCKET NO.- 050-237 UNIT NAME II UNIT SHUTDOWNS AND POWER REDUCTIONS DATE April 1, 1986 COMPLETED BY D. C. Maxwell TELEPHONE (815) 942-2920 j

REPORT MONTH March, 1986 a

i METHOD OF LICENSEE CAUSE & CORRECTIVE l

NO.

DATE' TYPEl DURATION REASON 2 SHUTTING EVENT SYSTEM COMPONENT ACTION TO (HOURS)

DOWN REACTOR 3 REPORT F CODE 4 CODES PREVENT RECURRENCE None 4

j i

I l

4 l

i i.

l-i 1

2 3

4 F: Forced Reason:

Method:

Exhibit G-Instructions for

)

S:

Scheduled A-Equipment Failure (Explain) 1-Manual Preparation of Data

~i B-Maintenance or Test 2-Manual Scram Entry Sheets for Licensee C-Refueling 3--Automatic Scram Event Report (

) File i

D-Regulatory Restriction 4-Other (Explain)

(NUREG-0161)

E-Operator Training & License Examination.

j F-Administrative 8

G-Operational Error H-Other (Explain) a

_. _ _.. _ _ _ - _ - - ~ _ _

DOCKET NO.- 050-249

~

UNIT NAME III j

UNIT SHUTDOWNS AND POWER REDUCTIONS DATE April 1, 1986 COMPLETED BY b. C. Maxwell TELEPHONE (815) 942-2920 REPORT MONTH March, 1986 METHOD OF LICENSEE CAUSE & CORRECTIVE NO.

DATE' TYPEI DURATION REASON 2 SHUTTING EVENT SYSTEM COMPONENT ACTION TO (HOURS)

DOWN REACTOR 3 REPORT if CODE 4 CODES s

PREVENT RECURRENCE f

6

.85-10-28 S

744:00 C

4 1

Off-line manually to 9th Refueling / Recirculation Pipe i

Replacement outag'e.

4 4

3 4

i i

t

)

4-4

~

1 2

3 4

~

F: Forced Reason:

Method:

Exhibit G-Instructions for l

S: Scheduled A-Equipment Failure (Explain) 1-Manual Preparation of Data

~

B-Maintenance or Test 2-Manual Scram Entry Sheets for Licensee C-Refueling 3--Automatic Scram Event Report (

) File D-Regulatory Restriction 4-Other (Explain)

(NUREG-0161) i E-Operator Training & License Examination,

j F-Administrative G-Operational Error

]

H-Other (Explain) e

DRESDEN UNIT 2 SAFETY RELATED MAINTENANCE - MARCH, 1986 LER OR OUTAGE MALFUNCTION EQUIPMENT NATURE OF MAINTENANCE NUMBER CAUSE RESULT CORRECTIVE ACTION R; place Core Preventive W.R.

1. 35660 N/A Replace HFA relays or core assembly per Ass:mbly - U2, NRC 1.E.Bulletin 84-02.

EPN #590 (Master and 78 Slaves)

R: place Core Preventive W.R. #36758 N/A Replace / rebuild HFA relays per NRC I.E.

Ass mbly - U2,Bulletin 84-02.

EPN #1530 (78 Slaves, Master 3

in R )

R: place Core Preventive W.R. #36759 N/A Replace HFA relays per NRC 1.E. Bulletin A2ssmbly - U2, 84-02.

EPN #1430 (Master and slaves 5, 6, 3

18 and 19 in R,

total 26 slaves)

Drywall Support Corrective W.R. #43085 N/A Welded support in drywell per Traveler.

Steal - U2 B F::dwater Sup-Corrective W.R. #43258 N/A Repaired "B" feedwater line support per port #B-2-3205, Traveler.

U2 l

l Target Rock Corrective W.R. #43259 N/A Installed supports per Traveler.

Supports M-1135, U2 "A" Fcedwater Corrective W.R.

1. 43263 N/A Repaired top flange of "A" feedwater Support B2-3211, support per Traveler.

.U2 l

l MOV 1301-4, U2 Preventive W.R. #43469 N/A Spliced leads, changed grease, replaced l

internal wiring.

?

l l

I

DRESDEN UNIT 2 SAFETY RELATED MAINTENANCE - MARCH, 1986 LER OR OUTAGE MALFUNCTION EQUIPMENT NATURE OF MAINTENANCE NUMBER CAUSE RESULT CORRECTIVE ACTION MOV 220-2, U2 Preventive W.R.

1. 43582 N/A Changed grease, internal wiring, and spliced motor leads.

MOV 1501-27B, U2 Preventive W.R.

1. 43605 N/A Changed grease, internal wiring, and spliced motor leads.LPRM 48-17B, Preventive W.R.

1. 44611 N/A Checked LPRM per procedure.

2-705-002 (48 B), U2 IRM #13, U2 Corrective W.R.

1. 46872 N/A Replaced pre-amp and performed procedure.

125 VDC Battery, Freventive W.R.

1. 47721 N/A Charged and verified with hydrometer.

U2 2 "D" LPCI Pump, Preventive W.R.

1. 48201 N/A Additional taping at motor and bus 2-1502D, U2 connections.

MOV 1001-1A, U2 Preventive W.R. #48331 N/A Replaced torque switch and lug connectors.

2 "D" CCSW Pump, Corrective W.R.

1. 48696 N/A Installed new vent valve.

2D-1501-44, U2 "A" CCSW Pump Corrective W.R.

1. 48933 N/A Opened positive interlock switch and Br:aker 2A-1501-replaced overhauled breaker.

44, U2 HPCI Inlet Drain Corrective W.R.

1. 49083 N/A Sealed weld on leaking union.

Pot, U2 "A" CCSW Pump Corrective W.R. #49144 N/A Silver soldered leak.

Vault Cooler, U2 MSL Rad Monitor Corrective W.R. #49183 N/A Replaced monitor.

i Ch nns1 D, 2-1705D, U2

DRESDEN UNIT 2 j

SAFETY RELATED MAINTENANCE - MARCH, 1986 l

LER OR OUTAGE MALFUNCTION EQUIPMENT NATURE OF MAINTENANCE NUMBER CAUSE RESULT CORRECTIVE ACTION

, MO 2-1402-25B, U2 Preventive W.R. #49280 N/A Adjusted center tip on open light socket..

l l MO 2-1501-28B, U2 Preventive W.R. #49281 N/A Replaced both bulbs, verified working condition.

LPRM 3B 48-41, U2 Preventive W.R. #49401 N/A LPRM checked per procedure.

2-705-002 L

LPRM 32-25B, U2, Preventive W.R. #49410 N/A LPRM checked per procedure.

2-705-002 l

l Relay 590-102G,U2 Corrective W.R. #49418 N/A Replaced limit switch and tested.

f

!MSLRadRecorder Preventive W.R. #49518 N/A Wrong chart on recorder, right chart B/D, RR2-1705-2K, ordered.

U2 "B" H 0 Monitor, Corrective W.R. #49545 N/A Replaced regulators, 02 sensor, calibrated 2 2 2-2404B, U2 and leak checked.

125 VDC Charger, Corrective W.R. #49597 N/A Installed new timer.

EPN 8300, U2 LPRM'24-57B, Preventive W.R. #49756 N/A Checked per procedure.

2-705-002, U2 l' U2 Diesel Corrgetive W.R. #49767 N/A Removed / installed turbo charger and G:nnrator associated parts per Traveler.

D2 Diesel Preventive W.R. #49831 N/A Changed oil, added oil to housing.

G2ntrator, EPN

1. 6600 i.PRM 32-41 B Preventive W.R. #49851 N/A Checked per procedures.

(Group 2),

2-705-002, U2 l

DRESDEN UNIT 2 SAFETY RELATED MAINTENANCE - MARCH, 1986 LER OR OUTAGE MALFUNCTION EQUIPMENT NATURE OF MAINTENANCE NUMBER CAUSE RESULT CORRECTIVE ACTION LPRM 4C-16-25, Preventive W.R.

1. 50080 N/A

~---

Checked per procedures.

2-705-002, U2 l

LPRM 32-49B, U2 Preventive W.R.

1. 50139 N/A Checked per procedures.

Dies 21 Generator, Preventive W.R.

1. 50151 N/A Performed annual inspection per proce-U2 dures.

l Diesal Generator, Preventive W.R.

1. 50233 N/A Performed annual inspection per proce-U2 dures.

APRM Channel 6, Corrective W.R. #50371 N/A Replaced K-23 relay, checked per procedure.

2-700 APRM 6, U2 A0 2-2301-28, U2 Corrective W.R.

1. 50372 N/A Installed new diaphragm on A0 valve.

Starting Air to Corrective W.R. #50378 N/A Replaced upper lis" carbon steel union on Air Start Motor, motors.

U2 S rvice Water Corrective W.R.

1. 50379 N/A Installed new 4" crane valve and two new Supply to Diesel gaskets.

Gen:rator Room Cooler 2-3933-500, U2 R: actor Level Corrective W.R. #50476 N/A Peplaced manifold valve.

Indicator Switch, i LIS-263-72C, U2 l 2 "C" HSL Rad.

Corrective W.R.

1. 50477 N/A Replaced converter, calibrated per l Monitor Signal procedure.

l I:olator, SCT l 1705-2M, U2 l

4 l

DRESDEN UNIT 2 SAFETY RELATED MAINTENANCE - MARCH, 1986 LER OR OUTAGE MALFUNCTION EQUlPMENT NATURE OF MAINTENANCE NUMBER CAUSE RESULT CORRECTIVE ACTION "B" Circuit Squib Preventive W.R. #50596 N/A Replaced bulb.

Valve, U2 Containment Preventive W.R.

1. 50745 N/A Wire removed from panel.

Monitoring Panel, 2-2252-81B, U2 "A" Reactor Bldg.

Preventive W.R. #50872 N/A Remounted nut to screw, performed cali-Vent Rad. Monitor bration check.

RE 1735-A, U2 MSIV 2-203-2C, U2 Preventive W.R. #50873 N/A Rebuilt 3-way valve.

Altsrnate Rod Preventive W.R. #50884 N/A Replaced light bulb.

In=rtion Valve A

"A" Trip, 263-25b U2 Accumulator 14-Preventive W.R.

1. 50941 N/A Replaced hand wheel.

23, 2-305-111, U2 Accu:.ulator 26-Preventive W.R. #50942 N/A Replaced hand wheel.

27, 2-305-111, U2 R fumling Inter-Preventive W.R.

1. 51057 N/A Installed Raychem heat shrink tubing over lock Signal Cable damaged portion of cable.

23216, U2 ACAD Compressor, Preventive W.R. #51164 N/A Checked pressure switch per procedure.

2-25'10-020, U2 D2 "A" 0 H Corrective W.R. #51201 N/A Installed new pump.

2 2 Analyzer Pump, U2 APRM Channel 6, Preventive W.R. #51367 N/A Recalibrated LPRM.

U2

i e

DRESDEN UNIT 2/3 SAFETY RELATED MAINTENANCE - MARCH, 1986 LER OR OUTAGE MALFUNCTION EQUIPMENT NATURE OF MAINTENANCE NUMBER CAUSE RESULT CORRECTIVE ACTION Sprra Feedwater Corrective W.R.

1. 31247 N/A Rebuilt check valve.

Chick Valve, U2/3 T rg:t Rock Valve Corrective W.R.

1. 35497 N/A Rebuilt target rock valve.

Spire 2-203-3A 2/3 Diesel Preventive W.R.

1. 41507 N/A Performed biennial inspection per G:nirator procedures.

quib Valves Preventive W.R. #43901 N/A Test fired squib valve.

(SBLC) 263 Quad's Safety Corrective W.R.

1. 45657 N/A Cleaned, rebuilt and tested valve.

Valve Spare Quad's Safety Corrective W.R. #45658 N/A Rebuilt and tested valve.

Valva Spare Quad's Safety Corrective W.R.

1. 45659 N/A Rebuilt and tested valve.

Vcive Spare Quad's Safety Corrective W.R.

1. 45661 N/A Rebuilt and tested valve.

Valva Spare Train B A/C Com-Corrective W.R. #46538 N/A Replaced starter coil, repaired actuating pr ssor, U2/3 arm, motor bridged and meggered.

Control Room Corrective W.R.

1. 46591 N/A Replaced contactor starter coil, repaired Str.ndby A/C Unit auxiliary arm.

Brr k r 2/3 D/G Interlock Preventive W.R. #47846 N/A Made adjustments to make door work Door properly.

DRESDEN UNIT 2/3 SAFETY RELATED MAINTENANCE - MARCH, 1986 LER OR OUTAGE MALFUNCTION EQUIPMENT NATURE OF MAINTENANCE NUMBER CAUSE RESULT CORRECTIVE ACTION 2/3 Dissel Preventive W.R.

1. 48246 N/A Performed quarterly inspection.

Gen:rator, 2/3 6601 MOV 2/3-7505A Preventive W.R.

1. 48685 N/A Replaced bearings, butt spliced and RayChem heat shrank leads.

2/3 Diesel Preventive W.R.

1. 48794 N/A Taped connections at breaker cubicle - E.Q.

G:;n?:rator 2/3 D/G Interlock Preventive W.R.

1. 48896 N/A Replaced door interlock mechanism.

Door DTS-31, U2/3 Preventive W.R.

1. 49069 N/A Calibrated per procedures.

Rx Bldg. Crane, Preventive W.R.

1. 49345 N/A Performed restricted mode test.

U2/3 Spare MSL Log Rad Corrective W.R. #49348 N/A Replaced K-6 trip relay and trip bush-Monitor, 2/3-button switch - checked and calibrated.

1705-2 Control Rocm AHU Preventive W.R.

1. 49682 N/A Work completed on W.R. 46538 on 12/10/85.

"B", 2/3-9400-100

~

Spara NCX-1344 Preventive W.R. #49710 N/A Charged batteries.

Bnttery Cells, U2/3 l

G.E. Indicator /

Corrective W.R. #50008 N/A Replaced Q3 (2N 1711) indirect current amp.

Trip, U2/3 D3 Rx Bldg. Vent Corrective W.R. #50254 N/A Installed new seals and "0" rings.

Syrtna Inlet Iso.

Vzlva - Versa Valva (Spare)

?

DRESDEN UNIT 2/3 SAFETY RELATED MAINTENANCE - MARCH, 1986 LER OR OUTAGE MALFUNCTION EQUIPMENT NATURE OF MAINTENANCE NUMBER CAUSE RESULT CORRECTIVE ACTION "B" Sttndby Gas Preventive W.R.

1. 50562 N/A Removed restraint wire, removed test Train, B-7500, connector, installed restraint wire.

U2/3 2/3 D/G Air Start Preventive W.R. #50774 N/A Bench tested valve - no problems found.

Solanoid DTS-32, U2/3 Preventive W.R. #50812 N/A Calibrated per procedures.

DTS-31, U2/3 Preventive W.R. #50813 N/A Calibrated per procedures.

2/3 SBGT "B" Preventive W.R.

1. 51288 N/A Cleaned cylinders and installed U-rings.

Train Inlet Daup r o

a

DRESDEN UNIT 3 SAFETY RELATED MAINTENANCE - MARCH, 1986 LER OR OUTAGE MALFUNCTION EQUIPMENT NATURE OF MAINTENANCE NUMBER CAUSE RESULT CORRECTIVE ACTION

, N;w E.Q. Motor Corrective W.R. #39843 N/A Replaced cracked motor hood, i for 3-5746A l (LPCI Room Coolcr) t l

ll Pansi 903-36, U3 Preventive W.R.

1. 41012 N/A Replaced all cracked cables.

Pressure Supply Preventive W.R.

1. 42217 N/A Inspected for E.Q. acceptability.

L val Trans. LT 3-1641-5B Pr;tssure Supply Preventive W.R. #42218 N/A Inspected for E.Q. acceptability.

L: vel Trans.

3A and 3B Rx Preventive W.R.

1. 43347 N/A Performed PT examination.

R circ. Pump 3A-202 and 2B-202 Drywrll Inlet Air Corrective W.R.

1. 46783 N/A Adjusted limit to get proper indication.

Flow Control, S0-2599, U3 Torus Wide Range Preventive W.R.

1. 48340 N/A Recalibrated and checked.

Leval Indicator Torus Wide Range Preventive W.R. #48341 N/A Recalibrated and checked.

L; vel Indicator Grr.pple Load Preventive W.R. #48712 N/A Adjusted hoist load switch.

Switch, U3 i

l Dirsal Generator, Preventive W.R. #48786 N/A Additional taping at bus connections -

U3 E.Q. requirement.

_..._..____ _~-

DRESDEN UNIT 3

SAFETY RELATED MAINTENANCE - MARCil, 1986 LER OR OUTAGE MALFUNCTION EQUIPMENT NATURE OF MAINTENANCE NUMBER CAUSE RESULT CORRECTIVE ACTION 3B Core Spray Preventive W.R. #48864 N/A Drilled weep hole in bottom of main L Pu p 3-1401-B junction box - E.Q.

I 3A Core Spray Preventive W.R.

1. 48865 N/A Drilled weep hole in bottom of main Pump 3-1401-A.

junction box - E.Q.

Instrurent Rack Preventive W.R. #48959 N/A Removed, tested and reinstalled valve.

Flow Check 3-263-2-19B Instrument Rack Preventive W.R. #48960 N/A Removed, tested and reinstalled valve.

Flow Check 3-263-3-17B Instrument Flow

. Preventive W.R. #48961 N/A Removed, tested and reinstalled valve.

Chuck Valve 3-263-2-15B Instrtre.ent Rack Preventive W.R. #48962 N/A Removed, tested and reinstalled valve.

Flow Check 3-263-2-13B J.B. 3TB-129; U3 Preventive W.R. #49252 N/A Drilled weep hole in bottom of junction box - E.Q.

J.B. 3TB-181, U3 Preventive W.R. #49253 N/A Drilled weep hole in bottom of junction box - E.Q.

s..

J.B. 3TB-218, U3 Preventive W.R. #49254 N/A Drilled weep hole in bottom of junction box

'E.Q.

Rx Pressure Trans, Preventive W.R. #49298.

N/A Inspected and calibrated for E.Q.

l Calibration, PT l 3-662 l

DRESDEN UNIT 3

SAFETY RELATED MAINTENANCE - MARCH, 1986 LER OR OUTAGE MALFUNCTION EQUIPMENT NATURE OF MAINTENANCE NUMBEk CAUSE RESULT CORRECTIVE ACTION Rx Bldg. Inlet Corrective W.R. #49555 N/A Replaced inlet isolation valve and versa Irolttion Damper solenoid valve.

3-B-5241, U3 D3 Isolation Preventive W.R.

1. 49590 N/A Repacked valve.

Condenser 3-1302-500 MSL High Flow Preventive W.R.

1. 49771 N/A Performed PM&C of MSL high flow switches.

Switchrs, dPIS 3-261A thru 2S, U3 LPRM Connectors, Preventive W.R.

1. 50099 N/A Retrofitted all spare LPRM's with lemo U3 connectors.

Dissal Generator Corrective W.R.

1. 50770 N/A Installed new heat exchangers and gaskets.

Cooling System, D-3 6601, U3 accumulator Low Corrective W.R. #50958 N/A Replaced switch.

Pressure Switch for CRD 10-23 3-305-130 D/G Cooling Water

Preventive W.R.

1. 51023 N/A Cleaned sight glass and reinstalled.

Hrad Tank, U3 D/G cont. Lube Corrective W.R.

1. 51072 N/A Installed new pump and coupling.

Oil Pump, U3 Accua. Low Pres-Corrective W.R.

1. 51075 N/A Replaced switch.

sure Switch for CRD 30-47, 3-305-130

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UNIQUE REPORTING REQUIREMENTS MAIN STEAM RELIEF VALVE OPERATIONS Relief valve operations during the reporting period of March, 1986 are summarized in the following table. The table includes information as to

. which relief valve was actuated, how it was actuated, and the circum-stances resulting in its actuation.

Valves Description Unit Reporting Period Actuated Actuations Conditions of Events 2

03-01-86 to 03-31-86 None 1

3 03-01-86 to 03-31-86 None P

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SUMMARY

OF OPERATING EXPERIENCE-UNIT TWO j'

MARCH,--1986

~03-01--86 ' to 03-31-86 '

' Unit 2 operated the entire month of March at maximum.

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1' core flow (except for normal weekend surveillances) i-reaching a power level of 829 MWe, with an availability of 100% and a capacity factor of-93.24%.

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SEKMARY OF OPERATING EXPERIENCE l

UNIT THREE l

MARCH, 1986 03-01-86 to 03-31-86 Refueling outage activities continued throughout-the entire period. The unit is presently scheduled to startup-in mid-June, 1986. Major work includes:

- Normal pump (s) and valve (s) maintenance:

- Decontamination of the removed recirculation piping.

- Replacement of the recirculation piping.

- ISI inspections-

- LLRT

O Morris, Illinois 60450 Commonwealth Edison Dresden Nuclear Power St; tion R.R. #1 Telephone 815/942-2920 April 1, 1986 DJS LTR:

86-236 Director, Office of Inspection and Enforcement United States Nuclear Regulatory Commission Washington, DC 20555 Attention: Document Control Desk

Dear Sir:

Enclosed, please find Dresden Station's operating data for the month of March, 1986. This information is supplied to your office per the instructions set forth in Regulatory Guide 1.16.

Sincerely, D. J. Scott Station Manager Dresden Nuclear Power Station DJS:DCM:hjb Enclosure cc: Region III, Regulatory Operations, U.S. NRC Chief, Division Nuclear Safety, State of IL U.S. NRC, Document Management Branch Nuclear Licensing Administrator Nuclear Fuel Services Manager Nuc. Sta. Div. Vice Pres.

Manager, Tech. Nuc. Sta.

Tech. Staff A.E.

On-Site NRC Inspector Sta. Nuc. Eng. Dept.

Sta. Q.A. Dept.

Comptroller'a Office PIP Coordinator INP0 Records Center File /NRC Op. Data File / Numerical

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