ML13317B072
| ML13317B072 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 04/07/1982 |
| From: | Baskin K Southern California Edison Co |
| To: | Crutchfield D Office of Nuclear Reactor Regulation |
| References | |
| REF-GTECI-A-44, REF-GTECI-EL, TASK-A-44, TASK-OR NUDOCS 8204090247 | |
| Download: ML13317B072 (14) | |
Text
Southern California Edison Company P. 0. BOX 800 2244 WALNUT GROVE AVENUE ROSEMEAD, CALIFORNIA 91770 K. P. BASKIN TELEPHONE MANAGER OF NUCLEAR ENGINEERING, (213) 572.1401 SAFETY, AND LICENSING April 7, 1982 Director, Office of Nuclear Reactor Regulation Attention:
D. M. Crutchfield, Chief Operating Reactors Branch No. 5 Division of Licensing U. S. Nuclear Regulatory Commission Washington, D.C.
20555 Gentlemen:
Subject:
Information Request Regarding Station Blackout, Unresolved Safety Issue A-44 San Onofre Nuclear Generating Station Unit 1 By your letter dated July 9, 1981, you requested information relating to diesel generator performance for the years 1976 through 1980, inclusive.
This information was to be provided in tabular form, using an accompanying set of explanations/clarifications.
Your letter requested the above information by October, 1981.
In our reply dated August 13, 1981, we requested an extension until December 15,
,1981. During subsequent telephone contacts with members of your staff, we requested additional extensions, as the actual time and effort involved in completing a satisfactory job from the available data increased.
Enclosed herewith is the requested information pertaining to the San Onofre Nuclear Generating Station, Unit 1, diesel generators #1 and #2. These generators became operational during the October 1976-March 1977 plant outage, which accounts for the fact that data for the year 1976 is not included.
Should you have any questions relating to this submittal, please contact the undersigned.
Very truly yours, Enclosure A
820 00247 2!0407 F-~
Plant Name SONGS TABLE 1 Diesel Cenerator Operations Data Unit No.
T Calendar Year 19_U Reason for DC Niumber Number Percent Duration of Run Operation, & scheduled DC of of Loading of Before Stop For Identification of Failure Duration of Run Ho, Starts Failuret DC (KW)
Each DC Failure (Refer to attached LERs or Table 3)
Monthly Surveillance 1
9 0
73.7%-(42.MW)_
1 hr, 1 start/test 2
9 0
73.7% (4 42AJ)
Refueling:
(a) Load Test 1
1 0
0 1 hr, 1 start/tes 2
1 0
0 (b)
Overspeed Test 1
2 0
2 starts/test 1
2 0
(c): Load Rejection 1
1 n
100L (6MVA)
Test. 1/2 hour, 2
1 0
100%(6MW) 1 start/test No Load-perability 1
42 0
0 Test.
2 50 0
0 1 start/test or 2 starts*/test Full Load Operability 1
2 0
73.7%(4 42MW)
Tests.
1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />, 2
1 0
73.7%(4.42:MW) 1 start/test Partial Load 1
0 0
0 Operability Tests 2
0 0
0
- 2 starts/test where other diesel is removed fran service.
These include 1 start before removing other diesel, 1 start after removing.**Calculated using continuous kilowatt rating of 6000 KW as 100% load.
ALE2Dlagal Generatar Scheduled Downtime flecord Plant Name SONGS Calendar year 19J Unit No.
Hours of DowntmcIe Reason tat RetCor shutdown, Reactor not shutdown Comments kaiacenanca 0
038 77.2 Includes principally cleaning, servicing, adjustments, inspections, tests etc.
May include sone repai r.
mdifications &
F-ar0 0
53.2 11.8 Includes hardware changes.
Time DC to unavailable 0
0 91.2 89.0 for emergency serhics
TABLE 3 Diesel Generator Unscheduled Downtime Record Plant Name SONGS Calendar Year 1911 Unit No.
1 LER Abstract N4 Downtime Hours Comments -
It any of the reported failures would not have been a (Roter to attee failure under emergency conditions, please explain Iere.
ed LER Abstracia)Total Trouble-PartaDel-Repair/
Refer to attached LERe or the failures listed in Table 1.
IHours shooting tveryaetctleplace 9
0 0
0 0
During assembly, supports omitted on sections of fuel oil bypass lines for #1 and #2 diesel generators. Supports were installed.
01
Plant gpm.
SONGS TABLE I Desel Cenerator Operations Data Unit No.
Calendar Year 19 78 Reason for DC Num"er Nunber Percent Duration of Run Operation, & scheduled DC of of Loading of Before Stop For Identification of Failure Durntion of Diun No, Starts Fatluret DC (KW)**
Each DC Failure (Refer to attached LER. or Table 1)
Monthly Surveillance 1
12 2
71-a3(4 4iM iS'k fuel linkage, TFR'S 47 and R 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />, 1 start/test
--2 19
- n.
73 7.(4-427)
Refueling:
(a) Load Test, 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> 1
1 0
98%(5.9MW) 1 start/test 2
1 0
92%(5.5MW)
(b)
Overspeed Test
-1 2
2 starts/test 2
2 0
(c)
Load Rejection Tesi 1
1 0
50% (3W) 1 1/2
- hour, 1 start/
2 1
0 50%(3MW) test No Load Operability 1
28 0
0 Test 1 start/test or 2
32 0
0 2 starts*/Test Full Load Operability 1
273,70
%(4JL 42 MW)
Tests.
2 1
0 73.7%(4.42i MW) 1 hr., 1 start/test r1) 1 1
0 15%(0.65MW)
Partial Load Operabili:
2 0
75%(4.5MW) 4 tests 2
0 0
0 1 start/test
- 2 starts/test where other diesel is removed fram service.
These include 1 start before removing other diesel, 1 start after renoving.
- Calculated using continuous kilowatt rating of 6000 KW as 100% load.
TABLE 2 Diesel Cenerator Scheduled Downtime Record Plant Name SONGS Calendar Year 19_U8 Unit No.
1I.
Hours of Downtime Reason for Reactor shutdown Reactor not shutdown Comments Downtime Dm I Du Gi W1 DI.
DS
-1IF -UI MS7 J
P 2____________
Maintenance 18d 17d 67.0 14.0 Includes principally cleaning, 7h 13h servicing, adjustments, inspections, tests etc. May include sane repair.
Modifications &
6 92 2.0 0
Includes hardware changes.
Repair Time DC is unavailable 18d 21d 69 14 for emergency service 13h 9h
TABLE 3 Diesel Cenerator Unscheduled Dow.ntlme Record Plant Name SONGS Calendar Year 19_8 Unit No.
LER Abstract N(
Downtime Hours Comments -
If any of the reported failures would not have been a (Refer to attc failure under emergency conditions, please explain here.
d)Total Trouble-artsDel-Repair/
Refer to attached LERa or the failure. listed in Table 1.
ed LEK Abstracle Hours shooting Lvery.aetctoplace 7
2.7
- 1 diesel generator failed to start for monthly test. Stuck fuel linkage nechanism. Fuel linkage mechanism freed.
8 1
- 1 diesel generator failed to start. Insufficient lubrication in fuel linkage. Linkage lubricated and freed. Engine successfully started.
SONGS TABLE I Diesel Generator Operations Data Unit No.
1 Calendar Tear 19 79 Reason for DC NuAker Nuuder Percent Duration of Run Operation, & scheduled DC of of Loading of Before Stop For Identification of Failure Duration of Run No, Starts Failure DC (KN)** Each DO Failure (Refer to attached U09 or Table 3) monthly Surveillance 1
12 0
3.7% (4.422 )
1 hr., 1 start/test 2
12 0
73.7%(4.422 w)
Refueling Tests 1
0 0
0 2
0 0
0 No Load Operability Test 1
31 0
0 Auto voltage regulator did not perform well 1 start/test or 2
30 0
0 2 starts*/test Full Load Operability 17 Q
73.7%(4,422/)
Tests 2
_8 0
73.7%(4.422W) 1 hr., 1 start/test Low Load Operability 1
0 0
0 Tests 2
1 0
17%(1MW) 1 start/test High Load Operability L
1 0
tests 2
3 0
100%(6MW) 1 start/test
- 2 starts/test where other diesel is remnovedi from service.
These include 1 start before rem-oving other diesel, 1 start after removing.
- Calculated using continuous kilowatt rating of 6000 KW as 100% load.
TABLE 2 Diesel Generator Scheduled Downtime Record Plant Name SONGS Calendar Year 1979 Unit No.
1 Hours of Downtime Reason for Reactor shutdown Reactor not shutdown Comments Downit ime DGY ou VGgf lx-UI INGJr Dre D1-1i11 -i Gr
-uiGi Haintenance 18 0
35.5 33 Includes principally cleaning, servicing, adjustments, inspections tests, etc. May include sane repair.
Mod fications &
0 5
3.5 10 Includes hardware changes.
Repair Time Dc is unavailable 18 5
9.0 43 for emergency service
TABLIE 3 Dieael Cenerator Unscheduled Downtime Record Plant Name SONGS Calendar Year 1979 Unit No.
1 LER Abstract N(
Downtime Hours Comments -
If any of the reported failures would not have been a (Rafer to stcl failure under emergency conditions, please explain here.
ed LER Abstrac a)Total Trouble-PartaDel-Repair/
Refer to attached LERa or the failures liated in Table 1.
______Abstracts)Hours shooting Lverygetcteplace 4
7 (Max) 0 0
0
- 2 load sequencer and associated safety injection train inoperable for 7 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br /> or less.
Redundant sequencer and safety injection train not affected.
Power supply reset and sequencer tested.
5 0
0 0
0 Supports missing on piping utilized to transfer diesel fuel from storage tank to day tank associated with each diesel generator.
New supports installed.
6 4
0 0
4 Failed power supply in #2 sequencer. Reactor brought to subcritical condition. Failed power supply replaced;
Plant eae SONGS.
TABLE 1 Desel Generator Operations Data Unit No.
1 Calendar Year 19_80 Reason for DC uber Huwber Percent Duration of Run Operation. & scheduled DC of of Loading of Before Stop For Identification of Failure Duration of Ruen
-1o, Starts Failuret DC (KN)
Each DO Failure (Refer to attached LERe or Table 3)
Monthly Surveillance 1
11 0
73.7%(4.422 )
1 hr., 1 start/test 2
10 0
7 3. 70A (4 - 4 2_
__W1 Refueling:
(a) Load Test I_1_0
_7%
(2,1M) 1 hr.,l start/test 2
1 0
45.2%(2.OMW (b)
Overspeed Test 1
2 0
2 starts/test 2
2 0
(c) Load Rejection Test 1
1 50% (3MW) 1/2 hr., 1 start/
2 1
50%(3W) test No Load Operability Tes 1
30 0
0 1 start/test or 2 starts*/test 2
28 0
0 Full Load Operability 1
3 0
73.7%(4.422 )
Tests. 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />, 1 start 2 4
0 3.7%(4.422! )
test Partial Load Operabilit 1.
Tests 1
1 0
.67%
(_W) 1 start/test 2-140%???
(2_)
1 075-A(4-SiMW1
- 2 starts/test where other diesel is removed fran service.
These include 1 start before removing other diesel, 1 start after removing.
- Calculated using continuous kilowatt rating of 6000 KW as 100% load.
TABLE 2 Diesel Cenerator Scheduled Downtime Record Plant Name SONGS Calendar Year 1980 Unit No.
1 Hours of Downtime Reason for Reactor shutdown Reactor not shutdown Comments Downtime 1T0 UGY DGy DCF DGI DGI DCO DWF DGI DC0 1
2 1
2 Maintenance 6d 29d 0.75 2.75 Includes principally cleaning, servicing, adjustments, inspections, tests, etc. Nay include some repair.
Modifications &
6.5 35.5 0 17.75 Includes.hardware changes.
Repair Time DC is unavailable 6d 30d 0.75 20.5 for emergency service 18.51 9.2h
TAIl.K I Diesel Cenerator Unecheduled Downitimeo Record Plant Name SONGS Calendar Year 191M Unit No.
LFR Abstract N4 Downtime Iours any of the reported failurea would not have been a (Refer to atta failure under emergency conditions. please explain lere.
ed LER Abetracts)Total frouble-arte,Del-Repair/
Raer to attached LERs or the failures listed to Table 1.
H hours aooting Ivoryeteplace 1
0 0
0 0
Worn thrust bearings on all 4 turbochargers on #1 diesel generator.
Did not affect turbocharger performance.
2 0
0 0
0 Same as in 1 above (#1 diesel generator) 3 4
3 0
1 Water in vault of #2 diesel generator fuel oil transfer punps (G-75A, G-75B) up to level of lower motor bearing.
Pump inoperative.
Vault dewatered.
J/
TABLE 4 Onsite Emergency Diesel Generator and Plant Name SONGS Auxiliary Equipment ModificaLion Record Unit No.
1 Equipment or Date of Reason for Modification and procedure Hod.
Desired Improvement Description of Modification modified
- 1. Diesel Gen #1 Starting air system 8/05/77 Design improvement Modifications to air pressure switch and air filter dryers.
- 2. Diesel Gen #1 Instrument air 8/31/77 Design improvement Extended air receiver drain line.
canpressor
- 3.
Diesel Gen # 1 & 2 Control circuit 5/09/77 Design correction Revised fail to start circuit (#2) 5/10/77 As above (#1)
- 4.
Diesel Gen # 1& 2 (a) Pushrods 5/08/79 To locate adjusting point of Replaced diesel engine pushrods with pushrods rocker ann adjusting screw more of newer design.
nearly in its mid travel position.
(b) Starting air Longer maintenance intervals.
Replaced existing air supply filter with distributor More.resistence to corrosion.
improved air filter.
(c) Fuel injection 5/08/79 To insure that fuel pump rack Provided positive mechanical stop for diesel pumps travel is limited to point at engine cylinder fuel injection pumps.
which engine develops maximum power.
(d) Governor/
5/08/79 Improved headed pin and retaining New design terminal.lever pin forgovernor actuator bracket positively restrain pin actuator.
and prevent control loss through loss of pin.