ML20054B686

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Forwards Response to NRC 820120 Request for Info Re ECCS Unavailability.Encls Provide Listing of Equipment Outages Associated W/Lers,Corrective & Preventive Maint & Approx Outage Time Associated W/Surveillance Testing of ECCS
ML20054B686
Person / Time
Site: Calvert Cliffs 
Issue date: 04/13/1982
From: Lundvall A
BALTIMORE GAS & ELECTRIC CO.
To: Clark R
Office of Nuclear Reactor Regulation
References
TASK-2.K.3.02, TASK-2.K.3.17, TASK-TM NUDOCS 8204190063
Download: ML20054B686 (18)
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Text

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.a BALTI M ORE GAS AND ELECTRIC CHARLES CENTER. P. O. BOX 1475. BALTlMOR E, MARYLAND 21203 ARTHUR E. LUNDVALL. JR.

ViCE PRESIDENT SUPPLY t-n>

Office of Nuclear Reactor Regulation y

g U. S. Nuclear Regulatory Commission p

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Washington, D. C.

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b g _D S-2 fp Attn:

Mr. R. A. Clark, Chief

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S 3 Operating Reactors Branch #3 p

Division of Licensing g,g g

Subject:

Calvert Cliffs Nuclear Power Plant 4

Unit No. 1, Docket No. 50-317 tu

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TMT Action Plan Items II.K.3.2 & II.K.3.17

Reference:

Letter from R. A. Clark to A. E. Lundvall, Jr.,

dated January 20, 1982, same subject.

Gentlemen:

The referenced letter requested information on emergency core cooling system (ECCS) unavailability. The attachments to this letter are provided in response. Attachment 1 is a listing of equipment outages associated with Licensee Event Reports, corrective and preventive maintenance, and facility changes. Attachr.ent 2 provides the approximate outage duration associated with surveillance testing of ECCS and ECCS-related equipment.

You also requested additional information on pilot operated relief valves. We plan to provide this by April 21, 1982.

If you have any further questions, please contact us.

j.-

g Very truly yours, f

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J. A. Biddison, Esouire O

G. F. Trowbridge, Esquire y

Messrs. D. H. Jaffe - URC R. E. Architzel - NRC

//

8204190063 820413 PDR ADOCK 05000317 P

PDR

UNIT 1 AND COMMON ECCS EQUIPMENT ATTACHMENT 1 Page 1 l

EVENT DATE LENGTH OF CUTAGE COMPONENT l

CAUSE CORRECTIVE ACTION l

03/16/77 12 hr channel ZD lead of input resistor was replaced resistor

~

pressurizer pressure partially severed innut 03/17/77 53 hr

  1. 12 DG electricoverloadsforventilationloverloadunitsonallDG's 39 min ventilation fan fan tripped upgraded 04/25/77 44 hr
  1. 12 salt water pump discharge check valve would not travel stop on valve re-adjusted 40 min open 05/15/77 5 hr I #12 DC dirty main breaker contacts on fan breaker contacts cleaned 45 min 06/01/77 11 hr
  1. 11 DG corrective maintenance replaced bolts on air discharge 10 min piping and support for turbo charcer 06/03/77 1 hr
  1. 12 DG l loose fittings at inlets to tightened fittings 45 min cylinders #2 and #6 06/17/77 1 hr
  1. 11 DG
  1. 6 cylinder relief valve vibrated replaced relief valve 55 min loose and fell off i

06/22/77 2 hr

  1. 28 containment spray corrective maintenance repaired leaking cooler 28 min pump 07/11/77 8 hr
  1. 11 DG lube oil on exhaust manifold residue from fire cleaned and 10 min caught fire fuel injector replaced 07/13/77 48 hr
  1. 11 DG isolation valve to jacket coolant opened same pressure switch was shut 08/10/77 9 hr
  1. 11 component cooling corrective maintenance repaired salt water leak 50 min HX 08/25/77 31 min tri-sodium phosphate llessthan75ft3 TSP in added TSP to baskets (TSP) containment floor lesel baskets 09/08/77 2 hr
  1. 12 service water IIN preventive maintenance measured internal service water 58 min leakage 09/09/77 4 hr
  1. 11 service water flX corrective maintenance plugged leaking tubes 11 min

UNIT 1 AND COMMON ECCS EQUIPMENT ATTACHMENT 1 Page 2 l

EVENT DATE LENGTH OF OUTAGE COMPONENT CAUSE CORRECTIVE ACTION l

09/21/77 2 hr

  1. 12 DG corrective maintenance replaced pressure switch 40 min 09/27/77 29 hr
  1. 12 service water HX preventive maintenance tested for tube leaks 50 min l

10/03/77 6 hr

  1. 11 DG corrective maintenance repaired inlet service water 15 min control valve 10/04/77 8 hr
  1. 12 DG corrective maintenance repaired inlet service water 43 min control valve 10/07/77 7 hr
  1. 12 component cooling corrective maintenance replaced channel cover 25 min HX 10/10/77 4 hr
  1. 12 DG loose fuse holders in excitation tightened exciter and fuse 38 min circuitry holders 11/10/77 10 min
  1. 12 ECCS Pump Room Facility Change Request to elimi-new ambient temp. compensating exhaust nate the necessity of manual ad-motor control overloads installed justment of 480V motor control

& tested per FCR Program overloads due to change in ambient I

temp. conditions.

11/13/77 5 hr

  1. 11 DG fire on exhaust manifold

. extinguished fire and cleaned 16 min up soot and oil 11/15/77 9 hr

  1. 12 DG minor lube oil, fuel oil and repaired leaks 33 min cooline incket water leaks 11/16/77 4 hr
  1. 12 DG minor fuel oil, lube oil and repaired leaks 25 min cooling water leaks 12/19/77 40 min
  1. 11 component cooling corrective maintenance installed new relief valve HX 12/20/77 7 hr
  1. 12 component cooling corrective maintenance replaced channel cover and 55 min HX tested relief valve 12/28/77 1 hr
  1. 11 DG vent fan FCR, due to existing electrical added agastat to circuit to line up D/G could be started on un-start fan on all D/G starts.

42 min der-vinnltage or load bus without vent start 01/13/78 2 hr

  1. 11 DG corrective maintenance repaired fuel oil leaks 7 min l

UNIT 1 AND COMMON ECCS EQUIPMENT ATTACHMENT 1 Page 3 EVE::T DATE LENGTH OF OUTAGE l CCMPONENT CAUSE CORRECTIVE ACTION 01/23/78 2 hr I #12 LPSI Pump screw missing on circuit breaker replaced screw 02/13/78 2 hr SI Tanks improper calibration procedure transmitters re-calibrated for level transmitters 04/10/78 4 hr

  1. 12 DG control valve failed to open due spring bracket screw assembly and to positioner feed back spring lockwasher reset and tightened loose linkage.

04/10/78 13 min

  1. 12 DG overspeed trip restarted and tested 04/11/78 10 hr
  1. 11 4KV bus power lost due to breaker not breaker manually closed 35 min closing 04/13/78 50 min
  1. 11 DG start / failure alarm started DG 04/17/78 1 hr ESFAS channel ZD reading 0 volts re-energized cabinet.ZD 35 min lrepairedleak 05/30/78 3 hr

//11 salt water pump leak on header at pressure gauge

connection l

52 min 06/04/78 4 hr

  1. 11 DG fire on exhaust manifold lfireextinguished,testedand.

' restarted l

07/02/78 10 hr

  1. 11 DG dripping oil, caught fire extinguished fire and removed oil in exhaust line 07/08/78 58 min SIAS logic module B-8 logic module failed replaced module 09/24/78 23 min LPSI Pumps RAS actuated

' borated water from SFP transferred to RWT to reset RAS 12/18/78 21 min

  1. 11 DG "B" phase overload tripped overload reset and tested 02/16/79 1 hr
  1. 11 salt water pump discharge check valve failed to removed debris lodged against open disc in valve

UNIT 1 AND COMMON ECCS EQUIPMENT ATTACIIMENT 1 Page 4 EVENT DATE LENGTH OF OUTAGE COMPOSENT CAUSE CORRECTIVE ACTION 03/17/79 2 hr

  1. 11 service water HX valve would not stroke full open valve open; repaired duri g 40 min salt water outlet next outage isnintinn valve 03/21/79 1 hr ECCS Pump Room ex-airline tubing not fitted properly airline re-connected 42 min haust fan 04/11/79

< 1 hr aux HPSI hdr stop violated TS requirements for time operating instructions revised valve to open pomaintainvalveopeninModes 3

05/03/79 13 days

  1. 12 containment only 89 spray nozzles present; agg-builtn s st grggow s

header exceeds de-s ate - no cor-7 hours spray header FSAR requires 90 g

05/07/79 15 min LPSI Pump spurious recirculation actuation RAS reset and shutdown cooling signal caused by voltage transient restored 05/15/79 54 hr

  1. 12 DG blower failure repaired blower 9 min 06/15/79 4 hr
  1. 12 DG corrective maintenance repaired jacket cooling 20 min leaks on #12 cylinder 07/24/79

<72 hr

  1. 11 DG grounded primary winding in gener-replaced transformer ator exciter potential transformer,

I l

07/31/79 9 hr ESFAS A-4 logic over-voltage protection circuit adjusted actuation point actuation point out of calibration 08/23/79 1 br aux HPS1 hdr valve corrective maintenance closed valve to work on 35 min charging header 08/28/79 24 hr 1 ECCS and I contain-valves improperly positioned valves repositioned and color sig-ment spray system nal system installed to aid opera-tors in verifying positions 09/14/79 8 hr

  1. 12 HPS1 header corrective maintenance repaired weld on reducer 48 min for sample line pipe 09/14/79 l

40 min

  1. 11 & #12 DG air start air start hdrs not supported by installed seismic restraints j

hdrs seismic restraints 09/24/79 30 min

  1. 13 service water would not start on SlAS A-7 reset phase overloads pump signal

UNIT I AND COMMON ECCS EQUIPMENT ATTAuHMENT 1 Page 5 EVENT DATE LENGTH OF OUTAGE COMPONENT CAUSE CORRECTIVE ACTION 09/24/79 30 min aux high pressure failed to open on SIAS A-1 signal re-aligned valve contact loop isolation valve and tested 09/28/79 6 hr

  1. 11 shutdown cooling actuator vane arm failed new vane arm installed 30 min llX 09/29/79 14 hr
  1. 11 component cooling corrective maintenance carbon steel cap replaced 10 min HX salt water outlet with red brass or bronze cap as line recuired by ninine class 10/01/79 4 hr
  1. 11 DG calibrating series resistor out replaced resistor 35 min c f tolerance 10/18/79 1 hr
  1. 11 DG corrective maintenance changed set point 45 min 10/18/79 54 min
  1. 12 DG corrective maitenance changed set point 10/20/79 47 hr
  1. 12 DG clogged injectors cleaned and re-adjusted 40 min injectors 11/13/79 2 hr
  1. 12 DG sludge deposits on governor cleaned governor 47 min assembly 11/20/79 35 min
  1. 12 containment preventive maintenance adjusted spring tension on cooling fan controller handswitch 11/27/79 1 hr
  1. 12 DG preventive maintenance replaced automatic vent 20 min valve on service water return line 11/27/79 7 hr
  1. 11 DG corrective maintenance repaired fuel line leaks 15 min 12/04/79 1 hr
  1. 11 DG breaker auxiliary switch binding replaced switch 47 min 12/05/79 8 hr
  1. 11 component cooling corrective maintenance repaired valve 25 min HX 12/10/79 5 hr
  1. 11 salt water hdr corrective maintenance repaired #11 ECCS Pump Room 10 min valve air cooler relief valve

UNIT I AND COMMON ECCS EQUIPMENT ATTACHMENT 1 Page 6 I

I EVENT DATE LENGTH OF OUTAGE COMPONENT CAUSE CORRECTIVE ACTION 12/04/79 5 hr

  1. 12 DG corrective maintenance repaired fuel oil leaks 12/04/79 1 hr
  1. 11 DC repairs on output breaker & in-replaced breaker auxiliary switch 47 min vestigated problem with " sequence initiate" alarm 01/04/80 4 hr
  1. 12A IIPSI loop stop loose terminal on one of the tightened terminal screw electrical leads 02/02/80 15 min
  1. 11, #12, #21 DG SIAS failed to fully reset before alarm reset & diesels tested diesels were stopped causing a start failure alarm 03/17/80 4 min channel ZE corrective maintenance replaced defective isolation sensor cabinet module 05/06/80 27 hr
  1. 12 containment maintenance taken out of service pump motor vibration readings spray pump to uncouple pump from motor

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motor 6 returne-erv 05/07/80 1 hr

  1. 12 DC maintenance, time to reach rated repaired, checked and tested voltage greater than Tech. Spec.

speed switch circuit limit 05/15/80 5 hr

  1. 12 DG open circuit of speed switch repaired switch 55 min caused starting circuit to time out initiatine startinn failure 05/20/80 2 hr
  1. 11 service water service water system became air design change submitted to install 27 min system bound continuous air vents with alarm function 05/20/80 3 hr
  1. 12 service water service water system became air design change submitted to install 55 min system bound continuous air vents with alarm function 06/27/80 4 hr
  1. 12 DC preventive maintenance cleaned under diesel 10 min 06/29/80 5 hr
  1. 11 DG crankcase pressure alarm circuit diesel remained operable, alarm 5 min failure annunciator circuit was repaired and returned to service 07/01/80 19 hr salt water valve salt water valve failed to open cleaned valve actuator and 45 min
  1. 5212 fully ordered parts 07/02/80 6 hr
  1. 14 containment cooler would not shift speed to cleaned relay 35 min cooler slow

UNIT 1 AND COMMON ECCS EQUIPMENT ATTACliMENT 1 Page 7 EVENT DATE LENGTil 0F OUTAGE COMPONENT CAUSE CORRECTIVE ACTION replacedbrokenboltongovernor 07/15/80 4 hr

  1. 12 DG corrective maintenance fuel pump drive housing re-15 min placed 3 missing prease fittings on turbo charcer damner linknee 12/09/80 3 hr
  1. 12 DG oil leak on line to injector remo /ed and replaced line 9 min 07/21/80 31 min
  1. 11 DG no voltage or speed control replaced transformer and voltage regulator 07/30/80 2 hr
  1. 11, #12 DG seismic tubing required revised seismic design 35 min 1

08/06/80 1 hr ESFAS channel ZE corrective maintenance deenergized for trouble shooting 08/06/80 10 min

  1. 11 service water IIX valve opened for no apparent reason rebuilt solenoid valve outlet valve causing #11 SW hdr to decrease by 3 PSIG 09/01/80 55 min
  1. 12A SI tank tank level increased from 199" reduced tank level to 245" 09/17/80 6 hr
  1. 12 service water IIX tube leak plugged tube 45 min 09/19/80 6 hr
  1. 12 DG corrective maintenance repaired oil leaks 45 min 09/23/80 3 hr
  1. 12 DG corrective maintenance repaired oil leaks 5 min i

09/25/80 40 min channel ZD defective E/E module replaced module pressurizer pressure

~

10/25/80 6 hr

  1. 11 salt water system corrective maintenance repaired relief valve on outlet 25 min of 11 CC 11X salt water side 11/12/80 10 min
  1. 11 4KV bus breaker spuriously opened causing cause unknown; no corrective feeder breaker loss of shutdown cooling flow action 12/25/80 32 hr
  1. 11 component cooling outlet throttle valve would not repaired valve 40 min HX outlet valve open

UNIT 1 AND COMMON ECCS EQUIPMENT ATTACHMENT 1 Page 8 EVENT DATE LENGTH OF OUTAGE COMPONENT CAUSE CORRECTIVE ACTION 01/04/81 86 hr SI pumps recircu-two valves would not open when none; valves required to be lation valves CR HS actuated operational only in modes 1-4 01/12/81 55 min ESFAS Channel ZE corrective maintenance corrected erroneous sensor input 01/13/81 3 hr

  1. 12 DG switchgear would not close in on reinserted switchgear & cleared
  1. 21 4KV bus high resistance at secondary disconnect 01/19/81 16 hr
  1. 14 containment service water discharge valve replaced solenoid valve 25 min cooler failed to open 01/23/81 31 hr salt water, service broken nipple on valve isolated valve & repaired 40 min water & component nipple cooline systems 01/27/81 4 hr
  1. 12 DG fire on lagging around exhaust fire extinguished, lagging P Pe removed & inspected underneath i

45 min DG 02/17/81 3 hr ESFAS Channel ZD E/E isolation out of specs replaced E/E module 40 min S

PPed and start failure alarm reset control relays 01/08/81 9

n

  1. 12 DG received 68 hr 09/14/79
  1. 12 Cnmnt Spray motor stator coil chafted against leads tested and returned to 25 min pump incoming phase lead service 06/01/77 2 hr
  1. 12 DG failed to test and align AC power Reactor power reduced per TS 30 min sources within TS limit of ihr and AC sources were verified

UNIT 2 - ECCS EQUIPMENT ATTACHMENT 1

  1. 8 I

I l

LENGTH OF OUTAGE l

COMPONENT CAUSE CORRECTIVE ACTION EVENT DATE 02/22/77 11 hr

  1. 21 DG failed to start & assume rated started after re-assembly of 40 min cpuse unghin regu4 red time; l air start system s eed wi e t e rn i..e u 03/08/77 approximately d21 DC breaker tripped (operator error) l started #12DG l

S hours 03/22/77 13 hr

  1. 21 DG leak on service water inlet valve repaired leak 36 min causing low jacket cooling water i

04/13/77 2 hr

  1. 22 containment air

' dirty contacts in auxiliary replaced auxiliary switch 25 min cooler switch assembly assembly 05/11/77 l

159 hr

  1. 22A LPSI leak on valve repaired leak l

39 min

, header valve 05/18/77

< 1 hr

  • 21 HPSI Pump shutter over breaker cranking 23 HPSI pump aligned for backup mechanism not fully shut pre-operation.

Shut breaker, shutter venting breaker from closing and pump tested.

06/13/77 96 hr n21 salt water 11N

! leak due to corrosion of outlet repaired leak control valve 06/21/77 5 hr

'#21 DG minor oil leak tightened fittings to secure.

leaks 07/18/77 5 hr

  1. 21 DG oil leak repaired leak 08/18/77 4 hr SIAS Channel A isolation module failed

' replaced isolator 10 min sensor cabinet ZG 08/22/77 approximately TSP less than 75 ft3 TSP in added TSP 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> containment 08/25/77 8 min

  1. 21 containment spray corrective maintenance closed valve while replacing hdr isolation valve resistor in circuit 08/26/77 40 min TSP insufficient TSP (less than 75 ft3 added TSP in containment 08/31/77 164 day
  1. 21 salt water pump corrective maintenance repaired defective shaft bearing 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />

UNIT 2 - ECCS EQUIPMENT ATTACHMENT 1 Page 2 EVENT DATE LENGTH OF O'JTAGE COMPONENT CAUSE CORRECTIVE ACTION 09/28/77 unknown TSP recalculation of amount of adjusted ppm B10 in S1 & RWT TSP in containment required tanks to limit pH to 7.0 on STAS 11/01/77 26 hr

  1. 21 DG corrective maintenance replaced 8 rings & repaired 55 min leaks on #9 & #10 water jacket relief valves 11/04/77 4 hr ESFAS pressure faulty module on voltage signal replaced module 20 min transmitter isolator 11/15/77 1 hr auxiliary high pres-dirty switch contacts cleaned contacts 45 min sure header stop univo 11/16/77 13 min
  1. 21 ECCS Pump Room preventive maintenance replaced overload heaters exhaust fan 11/17/77 48 min
  1. 22 ECCS Pump Room preventive maintenance replaced overload heaters exhaust fan 11/25/77 72 hr
  1. 21 DC corrective maintenance repaired service water inlet control valve 12/13/77 18 hr HPSI header investigating / resetting relief opened auxiliary llPSI header, 35 min valve valve 01/10/78 72 hr
  1. 21 DG 1 ss of field 6 reverse power re-no corrective action, this con-lavs tripped while main turbine was dition would not occur during being loaded on the bus,/G busresulting accident conditions as the D/G in loss of load on the D would not be operating in parallel 01/11/78 11 hr
  1. 21 service water llX valve would not open further than repaired valve 55 min salt water valve 5%; shut valve & could not reopen it 01/13/78 5 hr
  1. 25 service water itX valve would not open further than repaired valve 35 min salt water valve 5%; shut valve and could not reopen it.

01/16/78 41 hr

  1. 21 salt water header corrective maintenance repaired leak on valve 25 min valve 06/06/78 15 hr
  1. 21 DG high resistance in breaker contacts replaced defective start relays 27 min 06/09/78 4 hr ESFAS Channel ZF isolation transformer non-linear replaced isolator 1

UNIT 2 - ECCS EQUIPMENT ATTACHMENT 1 Page 3 EVENT DATE LENGTH OF OUTAGE COMPONENT CAUSE CORRECTIVE ACTION 06/26/78 30 min SI Tank tank overfilled due to change in drained tank to proper level recalibration of level transmitter 07/11/78 approximately

  1. 21 DG service water control valve did not open
  1. 21 DG tested and restarted 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> inlet control valve properly 08/01/78 3 hr
  1. 21 DG service water valve failed to replaced valve plunger and 22 min open causing trip on high jacket seat cooline tennerature 09/05/78 8 hr
  1. 21B tank tank level too high (operator reduced tank level 30 min error) 09/07/78 11 hr
  1. 21B, #22B SI Tanks leaks of reactor coolant past increased boron concentration 43 min SIT outlet check valves 09/24/78 20 min SI Tank instrument level indicator out recalibrated level indicator of calibration 10/10/78 25 min
  1. 21 DG did not start on loss of 13KV bus none; TS requires only one 4KV
  1. 21 6 #24 4KV bus bus to be in operation in modes 5& 6 10/17/78 2 hr
  1. 21, #22 LPSI Pumps pumps became air bound causing loss vented pumps & restored of shutdown cooling shutdown cooling 10/17/78 17 min LPSI Pump stopped to avoid overflowing the restored system to reactor coolant out of the SG man-proper operation wavs (onernent errnr) 11/15/78 26 min refueling water tank technician failed to close sample closed sample valve valve causing low RWT level 12/13/78 50 min
  1. 22B SI Tank minor valve leakage causing repressurized tank pressure decrease i

12/13/78 33 min RWT 1cvel indicator IcVel indicator out of calibration filled RWT & calibrated

& RWT IcVel low instrument 02/08/79 30 min

  1. 22B SI Tank fill valve not shut tight; SIT closed valve level low 02/26/79 30 min
  1. 21 service water valve failed to open repaired valve on outage; left ilX salt water outlet open & used 2-CV-5210 for valve

. throttling

UNIT 2 - ECCS EQUIPMENT ATTACHMENT 1 Page 4 EVENT DATE LENGTH OF OUTAGE COMPONENT CAUSE CORRECTIVE ACTION 03/28/79 2 hr SI Tank Valve valve leaking causing low SIT level repaired leak 04/19/79 4 hr

  1. 21 B SI Tank level increased lowered tank level 50 min 04/29/79 9 hr
  1. 22A SI Tank level increased sampled tank & adjusted level 45 min 05/20/79 l

10 min

  1. 21 DG LSBrelayremainedenergizedduetohutoblockalarmaddedinControl t

slow response of lube oil pressure foomtoallowOperatorstoidentify i

switch this condition 05/25/79 106 hr

  1. 23 component cooling failed to start on SIAS A7 repaired pump 45 min pump signal during surveillance testing 05/25/79 19 hr SIAS logic module B-8 logic module failed replaced module 47 min 05/27/79 1 hr 4KV feeder breaker lost power to #24 4KV bus load shed signal automatically 33 min caused by spurious signal caused feeder breaker to open (no corrective action necessary) 06/02/79

-20 min

  1. 22B SI Tank leak on fill valve causing low closed valve and refilled tank level 06/21/79 20 min
  1. 21 DG valve for low pressure switch opened valve isolated causing trip on low pressure 07/03/79 15 hr
  1. 21 salt water system salt water inlet valve failed repaired valve 35 min 08/07/79 8 hr
  1. 21, #22 containment did not meet minimum flow re-design ability meets containment 10 min coolers quirements of STP & TS cooler requirements 09/14/79 5-7 days
  1. 21 DG corrective maintenance installed hangers on air start system 10/05/79 1 hr ESFAS channel ZF corrective maintenance replaced containment sensor 10 min voltage meter
10/22/79 3 min SI valve accidental removal of pressure re-opened valve transmitter closing valve

UNIT 2 - ECCS EQUIPMENT ATTACIIMENT 1 Page 5 EVENT DATE LENGTH OF OUTAGE COMPONENT CAUSE CORRECTIVE ACTION 10/12/79 1 hr

  1. 21 DG defective voltage regulator replaced voltage regulator 55 min 10/24/79 2 hr
  1. 21 DC corrective maintenance analyzed seismic supports 10/27/79 27 min
  1. 22 HPSI Pump seal failure, loss of boration repaired mechanical seal &

path pump internals 11/27/79 4 hr ESEAS Channel ZG corrective maintenance repaired condulet & corrected 45 min pressurizer pressure transmitter zero shift trang=ftfor 10/23/79 4 hr

  1. 21 RWT low boron concentration increased concentration 35 min 12/28/79 15 hr
  1. 21 LPSI Pump corrective maintenance repaired SI valve 51 min 01/07/80 4 hr indicator alarm defective equipment replaced RWT LED indicator circuit 01/10/80 5 hr
  1. 21 DG leaking gasket on jacket cooling repaired leak 35 min water discharge header 01/25/80 4 hr
  1. 22 containment packing gland leak installed new packing L

20 min spray header valve 02/15/80 167 hr

  1. 21 DG corrective maintenance changed injectors on #7 30 min cylinder

]

02/19/80 2 hr

  1. 22 ECCS Pump Room preventive maintenance replaced fan belts 7

15 min exhaust fan P

f 02/20/80 2 hr

  1. 21 containment spray corrective maintenance repaired valve 14 min header valve u

02/25/80 7 hr

  1. 21 LPSI Pump corrective maintenance maintenance crew removed R

30 min wrong pump; repaired pump 02/25/80 50 hr

  1. 21 containment corrective maintenance maintenance crew disassembled ggmp{nsteadofLPSIpump(see 40 min spray pump

UNIT 2 - ECCS EQUIPMENT ATTACPSENT 1 Page 6 l

LENGTIi 07 OUTACE COMPONENT CAUSE CORRECTIVE ACTION EVENT DATE l

02/27/80 46 hr

  1. 21 DG slow response of DC governor replaced governor 50 min 03/06/80 55 min
  1. 21 DG slow response of D/G governor replaced governor 03/16/80 26 hr
  1. 22 salt water tube leak plugged tube 10 min service water ilX 03/18/80 5 hr SIAS output relay faulty pin in relay socket repaired relay socket 50 min 04/16/80 3 hr ESFAS 15 VDC overvoltage relay tripped replaced relay 55 min power supply 05/05/80 10 hr
  1. 21 DG oil leak on exhaust header repaired oil leak, started and caused small fire ran D/G to verify operability 07/29/80 38 min ESFAS Channel ZE corrective maintenance replaced ZE SIAS & ZE CIS bistables 07/30/80 1 hr
  1. 21 DG corrective maintenance replaced non-seismic tubing,

25 min 07/31/80 30 min ESFAS Channel ZE maintenance - steam generator steam generator sigma was cali-pressure sigma required cali-brated and returned to service hrnrinn 09/14/80 23 hr

  1. 22 B SI Tank level indication erratic, cause level transmitter was repaired 25 min unknown and recalibrated 09/26/80 40 min ESFAS E/E module signal isolator failed replaced isolator 9

te m' 11/01/80 8 hr

  1. 21 containment air terminal shorting block flashed "fe t

cn wr fo d to 26 min cooler over, cause unkown be clean,a en & allefefonnections dry were fnun he t_

11/06/80 11 hr

  1. 21 4KV bus breaker both busses powered off 500KV red verified operability of #12, #21 bus without performance of periodic DG & assumel all AC sources oper-7 min demonstration of operability of re-able througbout event maininn AC sources giuswithoutperoth busses powered off 500KV redverified operability of #12, #21 11/06/80 11 hr
  1. 24 4KV bus breaker NST ys rpgion o{ormancgigf ergodic D/G & assumed all AC source oper-14 *i opera t o re-g able throughout event

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1 ATTACHMENT 2 Outages during Surveillance Tests - Unit 1 for period 1977 to 1981 LENGTH OF OUTAGE COMPONENT 5 hr

  1. 11 Component Cooling Pump 5 hr
  1. 12 Component Cooling Pump 5 hr
  1. 13 Component Cooling Pump 5 hr
  1. 11 Containment Spray Pump 5 hr
  1. 12 Containment Spray Pump 5 hr
  1. 11 HPSI Pump 5 hr
  1. 12 IIPSI Pump 5 hr
  1. 13 HPSI Pump 5 hr
  1. 11 LPSI Pump 5 hr
  1. 12 LPSI Pump 5 hr
  1. 11 Salt Water Pump 5 hr
  1. 12 Salt Water Pump 5 hr
  1. 13 Salt Water Pump 5 hr
  1. 11 Service Water Pump 5 hr
  1. 12 Service Water Pump 5 hr
  1. 13 Service Water Pump 288 hr
  1. 11 Diesel Cencrator 288 hr
  1. 12 Diesel Generator 16 hr Shutdown Cooling 720 hr ESFAS Channels (4 channels total) 1500 hr ESFAS Instrumentation 1500 hr SIAS Logic

1 ATTACHMENT 2 Outages during Surveillance Tests - Unit 2 for period 1977 to 1981 LENGTH OF OUTAGE COMPONENT 5 hr

  1. 21 Component Cooling Pump 5 hr
  1. 22 Component Cooling Pump 5 hr
  1. 23 Component Cooling Pump 5 hr
  1. 21 Containment Spray Pump 5 hr
  1. 22 Containment Spray Pump 5 hr
  1. 21 HPSI Pump 5 hr
  1. 22 HPSI Pump 5 hr
  1. 23 HPSI Pump 5 hr
  1. 21 LPSI Pump 5 hr
  1. 22 LPSI Pump l

5 hr

  1. 21 Salt Water Pump i

5 hr

  1. 22 Salt Water Pump I

5 hr

  1. 23 Salt Water Pump 1

5 hr

  1. 21 Service Water Pump 5 hr
  1. 22 Service Water Pump 1

5 hr

  1. 23 Service Water Pump 360 hr
  1. 21 Diesel Generator 16 hr Shutdown Cooling 720 hr ESFAS Channels (4 channels total) 1500 hr ESFAS Instrumentation 1500 hr SIAS Logic I

1 l

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