ML20031H134
| ML20031H134 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 10/19/1981 |
| From: | Daltroff S PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Stolz J Office of Nuclear Reactor Regulation |
| References | |
| REF-GTECI-A-44, REF-GTECI-EL, TASK-A-44, TASK-OR NUDOCS 8110270171 | |
| Download: ML20031H134 (14) | |
Text
a PHILADELPHIA ELECTRIC COMPANY 2301 M ARKET STREET P.O BOX 8699 1881 -1981 PHILADELPHIA. PA.19101 SHIELDS L. D ALTROFF (215l 841-5001 n/c'r*lic"/IEuEo=
October 19, 1981 Re: Docket Nos. 50-277 50-278 b
T3 Mr. John Stolz, Chief 1j j
Operating Reactors Branch #4 Division of Licensing b
OCM 6 bOIA -9 U.S.
Nuclear Regulatory Commission d "M'fgwon
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Washington, DC 20555
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/h D
SUBJECT:
Information Request Regarding Station
[p\\D Blackout, Unresolved Safety Issue A-44, Peach Bottom Units 2 and 3
Dear Mr. Stolz:
The information raquested by your July 9, 1981 letter (for determining the reliability of the onsite standby diesel generators), is attached in the form of four tables.
The information was extracted from surveillance test reports, log books and annual modification reports and to the best of our knowledge, represents all the data available on our four diesel generators.
Two of the LER's (80-011 and 78-041) submitted by the referenced request have not been addressed since they did not directly apply to the diesel generators.
Should you have any questions or require further information, please do not hesitate to contact us.
Very truly yours, l
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. - Page 2 TA RE 2 Diesel Cencrator Scheduled Downtime Record Plant Name Peach Bottczn Calendar Year 1975/76/77 Unit No.
2& 3 llours of Downtine Reason for Reactor shutdown Reactor not shutdown Comments Downtime TCar puy UGr UGF DGf DGf DGf DGf DGf DGF 1
2 3
4 1
2 3
4 Scheduled Haintenance 1975 5/12 Overhaul 30 hr 6/1 Temp. Control Valve 5 hr.
10/30 Governor Instabi ity 1.1dy 1976 5/10-5/20 Overhaul 1 dy 23 hv.1.4dy 22hr 8/3 Oil Leak 10 hr 1977 4/27 Oil Leak 6 1/2 hr 5/31-6/20 overhaul 2 1/2 1.7 3.8 4.7 day day day lay 6/21 Fuel Leak 1.5 hr.
6/27,8/26,8/28 Ta p.
~
Switch Calib.
8 1/2 20 hr hr.
I Time DG is unavoilable for emergency service because of required tests
. - Page 2 TARE 2 Diesel Cenerator SchzJuled Downtime Record Plant Name Peach Botton
[
Calendar Year 19.23/79 Unit No.
2&3 llours of Downticae Reason for Reactor shutdown Reactor not shutdown Commerr es Downtime DGF
' UGF UGf UGF DGf DGf DGf?_l DGb DG#
DGf 1
2 3
4 1
1 4
Scheduled Haintenance 1978 2/28 CrarAcase Ejector 4 hr.
Cleaned 3/1 Engine Repair 19 hr 4/24-5/6 overhaul 2.2 2.6 2.9 L.9 days days days
' lays 6/19 Heat Exchanger Icak 3 hr.
6/30 Hect Exchanger Icak 4 hr.
8/28 Repair Valve 2 hr.
.9/27 Replace Engine Gove.
2 hr 9/28 Replace Air Tubing L hr.
1979
~
1/5 Replace Governors 2.4hr 2.5hr 3 hr.
4/22-5/2 Overhaul 3.2 1.7 2.1 1.1 days days days lays 5/18 Fuel Line Repaired 3 hr 6/19-7/15 Replace Gover.
3 hr 9/11 Megger Transformers 1 1/2 1 1/2 1 1/2 1 1/
fir hr hr hr 10/5 Replace Governor 10 hr Linkage & Full Tubing Time DC is unovoilable for emergency service because of required l
tests l
l
. - Page 2 Taut.E 2 Diesel Cenerator Scheduled Downtime Record Plant Name Peach Bottan
[
Calendar Year 193 Unit No.
2A 7 Itours of Downtime Reason for Reactor shutdown Reactor not shutdown Comments Downtime DUF 007 UGr DGF DGE DGF DG#
DGf DGf DCf 1
2 3
4 1
2 3
4 Scheduled Maintenance 1980 1/3 Maintenance 21 hr 1/7 Modify Piping 12 hr 7/8 Reset overspeed Trip 17 hr 7/19 Repair 'Ihrust Bearing 2.1 6/9 - 7/30 Overhaul 4.1 3.9 3.2 2.8 12.5 4 hr 3 hr 9 hr days days days days hr.
Time DG is unovailable for emergency service because of required tests
)
Enclegure 1 - Page 3 TAtl.E 3 D!cscl Cencrator Unscheduled Downtinac itecord Plant Name Peach Bo'. tam
)
Calendar Year 1924/75/76 Uni't No.
2&3
~
LER Abstract th Downtice !!ours Cocaents - If any of the reported failures would not have been a (Refer to attcl failure unde ~r ectergency conditions, please explain here.
ed LER Abstracts) Total
'frouble-Parts, Del - Repair /
Refer to attached LERs or the failures sisted in Table 1.
llours shooting tvery,etc teplace 1974 Valve Irak 3 days Valve installed incorrectly.
Voltage Recula-10 days Water Leakage fran heating system into voltage reaulator tor current cabinet.
transfonner Supe. % er 3 days Weld Material janined and stripped gears, replaced Diesel Oil 4 hrs Defective control transfonner replaced.
transfer pump 1975 Fuel Lines 4 hrs.
Synthetic fuel lines replaced with metal tubing; solenoid solenoid valves valves replaced with piotless models Diesel circuit 8 hrs.
Linkage straightened and testing frequency increased.
breaker Expansion tank 2 hrs.
Replaced switch.
Level Switch Cylinder Teno.
1 hr.
Cleaned contacts.
indicator Field Flashing 1 hr.
Removed dirt particles in relay.
circuit.
Diesel Generc.
1 1/3 Failed charing notor replaced g
breaker hr.
i Bearing Tanp.
I hr.
Tightened loose connection.
alann.
1976 Strainer P 2 hr.
Defective diaphragm replaced.
Switch t
I LER #2-76-2/2T 10 hr.
j Operator error - DC Feed breaker opened preventina diesel start.
I
Enclosure ! - Page 3 TAtLE 3 Dicael Cenerator Unscheduled Dawntice Record Plant Nassepeach Bottcra Calend.ar Year 19 77/78 Uni't No.
_2 & 3
- DATA NCfr AWsIIABLE.
Downtice !!ours Coments - If any of the reported failures would not have been a LER Abstract N i (Refer to attel failure unde'r ectergency conditions, please explain here.
ed LER Abstracts) Total
'frouble-Parts, Del - Repair /
Refer to attached LERs or the failures listed in Table 1.
llours shooting tvery etc toplace 1977 3-77-26/1T 6 hrs.
Valve not closed and check valves leaking on air tanks for E3 & E4 2-77-37A/1T 4 days Governor improperly installed without shims causinc oversoeed trip.
2-77-37B/lT 1 hr Operator failed to set trip device after previous test.
77-56/3L Root valve to pressure switches left closed after switch calibration.
77-63/3L 8 hrs.
Oil leak accumulation causing fire hazzard.
2-77-63/3L 8 hrs.
Oil leak and cleanup near generator.
2-77-71/3L 2 hrs.
Oil leak and fuel line repair and cleanup.
2-77-77/3L 24 hrs.
Differential relay tripped.
1978 l
2-78-01/3L 7 1/2 Repair lube oil heater.
hrs.
2-7tt-05/3L 8 hrs.
Repair lube oil heater.
2 ~78-14/3L 10 hrs.
Water pressure in the diesel oil caused trip on high crank case pressure.
78-35/3L 1 hr.
Iraking check valve in air booster relay.
Secuential loading relays out of soecification -
78-41/1T surveillanct test corrected.
Failure to statc within 10 seconds (Governor problcm.)
78-50 I
t l
8 I
- - Paco 3 TAtLE 3 Diesel Cencrator Unscheduled Downtine Itecord Plant Name Peach ITottcm Calendar Year 1979/80/81 Uni't No.
2&3
- DATA NOT AVAILABLE.
Downtica llours Cocnonts - If any of the reported failures would not have been a LER Abstract H i (Refer to attel failure unde'r ectergency conditions, please explain here.
ed LER Abstracts) Total
'frouble-Parts, Del - Repair /
Refer to attached LE!!s or the f ailures listed in Table 1.
llours shooting Ivery.ete teplace L
1979 2-79-025 13 hrs.
Loss of oil due to cracked pipe fitting.
2-79-45/3L 1/2 hr Emergencv service water shutdcwn by operator error caused lube oil tenperature trip.
1980 2-80-11 Defective procedure for the cardox svsten at the diesel generator location. Not a D/G failure.
2-80-14 Faulty storage tank level indicator caused overflow.
1981 2-81-04 Misaligned interlock switch caused breaker not to close.
2-81-30/3L Coolant jacket flange leak.
e I
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2
- - Pags 4 Taut.E 4 Casite Emergency Diesc1 Cenuracor and Plant liasmo Peach Bottom Auxiliary Equipment llodification Itecord Unit tio.
2&3 Equipment or
' Date of Reason for }!odification and procedure lfod.
Desired Improvement Description of Hodification modified TD-2 Relays 1974 Solid state relays were Changed to agastat time delay relays to sensitive to voltage spikes improve reliability and safety.
Westinghouse BFD 1978 BFD relays had hich potential Chanced to agastat relays Relays for overlookim and failure l
l i
i Diesel Generator 1978 Improve Cervice Life Improved design of fuel header and cam fuel header and follower.
Cam Follower Diesel Generator 1979 Reliability Installed Woodward Governors tbdel Governors EG-B10C on all D/G.
Diesel Fuel Oil 1980 Fire Protection Added a high temperature switch to Tank the diesel fuel oil tank.
l l
Diesel Fuel Oil 1980 To neet Reg. Guide 1.137 Added Fuel samol m lines to tanks.
Tank 5
_. _ _