ML20028C325
| ML20028C325 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 01/04/1983 |
| From: | Garrity J Maine Yankee |
| To: | Clark R Office of Nuclear Reactor Regulation |
| References | |
| JHG-83-02, JHG-83-2, MN-83-03, MN-83-3, NUDOCS 8301070338 | |
| Download: ML20028C325 (6) | |
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EDISON DRIVE gg gg[ gggjgpguygggpy, AUGUSTA, MAINE 04336 co kd (iJi) 623-3521 O
January 4, 1982 MN-83-03 JHG-83-02 United States Nuclear Regulatory Commission Washington, D.C.
20555 Attention: Office of NJclear Reactor Regulation Division of Licensing Operating Reactors Branch No. 3 Mr. Robert A. Clark, Chief
Reference:
(a) License No. DPR-36 (Docket No. 50-309)
(b) MYAPCo Letter to USNRC, dated January 7,1981 - WMY-80-166 (c) USNRC Letter to MYAPCo, dated September 14, 1982
Subject:
Emergency Core Cooling System (ECCS) Outage
Dear Sir:
This letter provides the additional information regarding outages of ECC systems at Paine Yankee requested in Reference (c).
You specifically requested, Reference (c), outage information for the refueling water storage tank (RWST), the flow path from the RWST, and the safety injection tanks (SIT). These systems experienced no outages during the period of interest, therefore, do not appear in data.
Maintenance outages reported in Reference (b) have been revised, to incorpnrate better estimates of outage time for maintenance tasks and reacranged by regrouping under ECCS train affected (Encl. 1).
Detailed information on outages resulting from surveillance testing is not available from plant records. However, outage durations for the performance of required ECCS surveillance have been estimated. This information is provided for those monthly or quarterly surveillance actions which require taking the component out of service (Encl. 2). During the period of interest, the plant was operating for about four years and three months which resulted in 17 quarterly and 51 monthly surveillance periods.
Total outage duration can be estimated by multiplying the number of periods by the outage duration for each surveillance test of interest.
l@l 8301070338 030104 0361L - SEN PDR ADOCK 05000309 e
MAlhE YANKEE ATOMIC POWER COMPANY e
United States Nuclear Regulatory Commission Janaury 4, 1983 Attention: Mr. Robert A. Clark, Chief Page two MN-83-03 We trust that this information is satisfactory.
If you have any questions please do not hesitate to contact us.
Very truly yours, MAINE YAl*EE ATOMIC POWER COMPANY 0V John H. Garrity, Senior [irector MJclear Engineering & Licensing JHG:pjp (3 pages)
' (1 page) cc: Mr. Ronald C. Haynes Mr. Paul A. Swetland i
4 i
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0361L - SEN
Page 1 ENCLOSURE (1)
ECCS TRAIN A DATE DURATION SYSTEM COMPONENT CAUSE ACTION TAKEN (approx)
(estimated) 01-03-76 2 Hrs.
DG DG-lA
" Loss of control power" alarm Replace defective relay 03-04-77 2 Hrs.
DG DG-1A Leak Installed new gasket on fuel filter 02-18-78 2 Hrs.
DG DG-1A Electric speec control Cleaned dirty pc cards malfunction (see MY LER (78-003) 03-02-78 8 Hrs.
HPSI P14A Bearing failure during test Spare pump aligned. Pump reparied.
(See MY LER
- 78-007) 10-10-78 8 Hrs.
DG DG-1A HF0 Pressure Alarm during Tighten swedge lock fitting surveillance 08-23-78 tighten oil line fitting 11-05-79 2 Hrs.
DG DG-1A Poor contact connections in Repair / replace / clean control circuit contacts 12-10-79 2 Days DG DG-1A Turbocharger fire in DGlB Replaced turbocharger to prevent similar failure 04-08-80 30 Min LPSI LSI-M-31 Failed to operate during Valve cycled daily for 4 surveillance days satisfactorily (see MY LER #80-009) 05-06-80 30 Min LPSI LSI-M-31 Broken weld in coupling af Placed valve in open operating extension shaf t.
position. Reparied valve (see MY LER #80-112)
Page 2 ENCLOSURE (1)
ECCS TRAIN B DATE DURATION SYSTEM COMPONENT CAUSE ACTION TAKEN (approx)
(estimated) 01-26-76 6 Hrs.
DG DG-1B 011 level low Add 1 bbl oil 06-04-76 4 Hrs.
DG DG-1B Replace fuel oil filter 06-07-76 8 Hrs.
DG DG-1B Replace DC relay 08-26-76 8 Hrs.
DG DG-1B Annual PM 08-31-76 8 Hrs.
DG DG-1B Reset thermostat 10-07-76 6 Hrs.
DG 74-DC-3 Relay failed Replace relay (DG-18) 01-18-77 8 Hrs.
DG DG-1B Vibratrion Retorqued outer rim coupling bolts 01-19-77 8 Hrs.
DG DG-1B Vibration Retorqued outer rim coupling bolts 01-20-77 8 Hrs.
DG DG-1B Vibration Retorqued outer rim coupling bolts 03-29-77 8 Hrs.
DG DG-1B Replaced screening in exhaust silencer 11-01-77 8 Hrs.
DG DG-1B Replaced 4 fuel filter elements 09-25-78 8 Hrs.
DG DG-1B Governor control sluggish Air in fuel line. Line vented.
(see MY LER #78-023) 12-05-78 6 Hrs.
DG DG-1B Governor oil level increased Inspection only after diesel run 03-07-79 1 Hr.
HPSI HSI-M-54B Failed to operate during test.
Reset torque switches Improper torque switch setting (see MY LER #79-006)
Page 3 ENCLOSURE (1)
ECCS TRAIN B (CONT)
DATE DURATION SYSTEM COMPONENT CAUSE ACTION TAKEN (approx)
(estimated) 03-07-79 1 Hr.
CS CS-M-66B Failed to operate during test Reset torque switches due to improper torque switch (see MY LER #79-006) setting 06-29-79 8 Hrs.
DG DG-1B Lube oil pump shaft coupling replaced 10-16-79 6 Days OG DG-1B Turbocharger Fire Replaced turbocharger.
Changed engine drive fuel oil pump filters (see MY LER #79-026) 10-22-79 8 Hrs.
DG DG-18 Replace 4 fuel oil filters 10-23-79 8 Hrs.
DG DG-1B Replace 2 fuel oil filters 10-25-79 8 Hrs.
DG DG-1B Electric governor motor loose Remove motor-clean screws, on mounting etc., reinstall motor 11-17-79 8 Hrs.
DG DG-1B Vibration Replaced generator fan bearings, replaced blower shaft bearings 08-05-80 8 Hrs.
DG DG-1B Pinhole leak in copper gage Replaced copper tubing line from htx 08-26-80 2 Hrs.
Du DG-1B Trip during surveillance run Overspeed actuating arm loose. Tightened.
(see MY LER #80-018) 09-25-80 6 Hrs.
DG FL-308 Filter leak Replaced filter, o' ring DG-1B 09-26-80 6 Hrs.
DG DG-1B Woodward governor oil leak Tightened 8 screws on front plate
ENCLOSURE (2)
MONTHLY SURVEILLANCE DURATION PROCEDURE TITLE COMPONENT / SYSTEM TRAIN (ESTIMATED) 3.1.2 ECCS Routine Testing Spray Header A
1.0 hr.
4 Isolated Spray Header B
1.0 hr.
Isolated CS-M-66 Isolated B
5 min.
(SCAT Tank to RWST Isolation valve)
CS-M-71 Isolated A
5 min.
(SCAT Tank to RWST Isolation Valve)
Spray Pump A
30 min.
Spray Pump B
30 min.
3.1.4.A DG-1A Monthly DG-1A A
10 min.
Surveillance Test 3.1.4.B DG-1B Monthly DG-1B B
10 min.
Surveillance Test 3.1.5 Auxiliary Feed Pump Testing P 25 A A
30 min.
P 20 C B
30 min.
i QUARTERLY SURVEILLANCE 3.1.20 Safeguards Valve Testing E 3A (Spray HX)
A 5 min.
E 3B (Spray HX)
B 5 min.
DG-1A A
15 min.
DG-1B B
15 min.
I 5
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