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MONTHLY NARRATIVE REPORT OF OPERATION AND MAJOR MAINTENANCE EXPERIENCE This report describes the operating and taajor maintenance experience for-tie month of December,1986. This narrative report was prepared by the plant staff and is submitted in accordance with Section 6.9.1.7 of the Units'1 and 2 Technical Specifications.
MONTHLY NARRATIVE REPORT OF OPERATION AND MAJOR MAINTENANCE EXPERIENCE This report describes the operating and taajor maintenance experience for-tie month of December,1986. This narrative report was prepared by the plant staff and is submitted in accordance with Section 6.9.1.7 of the Units'1 and 2 Technical Specifications.
On December 1, 1986               Unit I started the month shutdown in its first refueling outage. Unit 2 started the month at full power.
On December 1, 1986 Unit I started the month shutdown in its first refueling outage. Unit 2 started the month at full power.
On December 3, 1986               Unit 2 reduced power to 50% to search for leaking condenser tubes.
On December 3, 1986 Unit 2 reduced power to 50% to search for leaking condenser tubes.
On December 4, 1986               Unit 2 returned to full power.
On December 4, 1986 Unit 2 returned to full power.
On December 5, 1986               Unit 2 reduced power to 50% to search for leaking condenser tubes.
On December 5, 1986 Unit 2 reduced power to 50% to search for leaking condenser tubes.
On December 6, 1986               Unit 2 returned to full power.
On December 6, 1986 Unit 2 returned to full power.
On December 9, 1986               Unit 1 entered Mode 4.
On December 9, 1986 Unit 1 entered Mode 4.
                        @ December 11, 1986               Unit 1 entered Mode 3.
@ December 11, 1986 Unit 1 entered Mode 3.
On December 12, 1986               Unit 2 reduced power to 50% to search for leaking condenser tubes.
On December 12, 1986 Unit 2 reduced power to 50% to search for leaking condenser tubes.
On December 13, 1986               Unit 2 returned to full power after plugging leaking condenser tubes.
On December 13, 1986 Unit 2 returned to full power after plugging leaking condenser tubes.
On December 20, 1986               Unit 1 entered Mode 2.
On December 20, 1986 Unit 1 entered Mode 2.
;                        On December 27, 1986               Unit 1 entered Mode 1.
On December 27, 1986 Unit 1 entered Mode 1.
On December 28, 1986               During the Unit 1 startup a reactor trip resulted i                                                          from a steam flow /feedwater flow mismatch l
On December 28, 1986 During the Unit 1 startup a reactor trip resulted from a steam flow /feedwater flow mismatch i
coincident with a low steam generator level.
l coincident with a low steam generator level.
While stabilizing the plant, Unit 1 experienced a second reactor trip due to low-low steam generator level.
While stabilizing the plant, Unit 1 experienced a second reactor trip due to low-low steam generator level.
On December 29, 1986               Unit I synchronized to the PGandE system. Unit 2 reduced power to 50% to search for leaking l                                                           condenser tubes and later returned to 85% power l
On December 29, 1986 Unit I synchronized to the PGandE system. Unit 2 reduced power to 50% to search for leaking l
condenser tubes and later returned to 85% power l
which was the maximum power level that could be achieved without incurring tube leakage.
which was the maximum power level that could be achieved without incurring tube leakage.
On December 31, 1986               Unit 1 ended the month at 30% while performing startup tests. Unit 2 ended the month with power at 85%.
On December 31, 1986 Unit 1 ended the month at 30% while performing startup tests. Unit 2 ended the month with power at 85%.
8701210139 861231 DR       ADOCK 0500     5 7
8701210139 861231 DR ADOCK 0500 5
M0.RPT                                                                                           /p
7 M0.RPT
/p


Unit I completed its first refueling outage which started August 29. On December 28, while disconnected from the PGandE system and at apprcximately 7% reactor power for turbine balancing, Unit 1 experienced a reactor trip.
Unit I completed its first refueling outage which started August 29. On December 28, while disconnected from the PGandE system and at apprcximately 7% reactor power for turbine balancing, Unit 1 experienced a reactor trip.
Line 46: Line 48:
The Unit 1 monthly availability factor was 5.8% and the capacity factor was 0.0%.
The Unit 1 monthly availability factor was 5.8% and the capacity factor was 0.0%.
Unit 2 operated this month with a unit availability factor of 100% and a unit capacity factor of 93.8%. Unit 2 reduced power 4 times this month. I time to search and plug leaking tubes and 3 additional times to search for leaking tubes.
Unit 2 operated this month with a unit availability factor of 100% and a unit capacity factor of 93.8%. Unit 2 reduced power 4 times this month. I time to search and plug leaking tubes and 3 additional times to search for leaking tubes.
No challenges to the steam generator safety valves or pressurizer power operated relief valves have been made. Significant Unit 1 safety related maintenance consisted of snubber washer inspections and the replacement of detectors NE-51 and N-42. Unit 2 safety related maintenance consisted of a seal replacement on centrifugal charging pump 2-2.
No challenges to the steam generator safety valves or pressurizer power operated relief valves have been made. Significant Unit 1 safety related maintenance consisted of snubber washer inspections and the replacement of detectors NE-51 and N-42.
Unit 2 safety related maintenance consisted of a seal replacement on centrifugal charging pump 2-2.
MO.RPI
MO.RPI


OPERATING DATA REPORT DOCKET N0.             50-275 DATE         01/05/87 COMPLETED BY             A.T. Keller TELEPHONE           (805)595-7351 OPERATING STATUS
OPERATING DATA REPORT DOCKET N0.
: 1. Unit Name:     Diablo Canyon Unit 1
50-275 DATE 01/05/87 COMPLETED BY A.T. Keller TELEPHONE (805)595-7351 OPERATING STATUS 1.
: 2. Reporting Period:     December 1986
Unit Name:
: 3. Licensed Thermal Power (MWt):     3338
Diablo Canyon Unit 1 2.
: 4. Nameplate Rating (Gross MWe):     1137
Reporting Period:
: 5. Design Electrical Rating (Net MWe):       1086
December 1986 3.
: 6. Maximum Dependable Capacity (Gross MWe):         1125                                               .
Licensed Thermal Power (MWt):
: 7. Maximum Dependable Capacity (Net MWe):           1073
3338 4.
: 8. If Changes Occur in Capacity Ratings (Items Number 3 Through 7) Since Last Report, Give Reasons:
Nameplate Rating (Gross MWe):
        ~~
1137 5.
N/A                                                                     1
Design Electrical Rating (Net MWe):
: 9. Power Level To Which Restricted, If Any (Net MWe):               N/A
1086 6.
: 10. Reasons For Restrictions, If Any:             None This Month         Yr-to-Date         Cumulative *
Maximum Dependable Capacity (Gross MWe):
: 11. Hours In Reporting Period                               744.0               8760.0           14494.3
1125 7.
: 12. Number Of Hours Reactor Was Critical                     227.0               5967.4           11265.7
Maximum Dependable Capacity (Net MWe):
: 13. Reactor Reserve Shutdown Hours                               0.0               0.0               0.0
1073 8.
: 14. Hours Generator On-Line                                   43.3               5758.2           10965.4
If Changes Occur in Capacity Ratings (Items Number 3 Through 7) Since Last Report, Give Reasons:
: 15. Unit Reserve Shutdown Hours                                   0.0               0.0               0.0
~~
: 16. Gross Thermal Energy Generated (MWH)                   48788             16976617         33542069
N/A 1
: 17. Gross Electrical Energy Generated (MWH)               11200             5619400         11133732
9.
: 18. Het Electrical Energy Generated (MWH)                 -10482       ** 5293477         *'10527811
Power Level To Which Restricted, If Any (Net MWe):
: 19. Unit Service Factor                                           5.8             65.7             75.7
N/A
: 20. Unit Availability Factor                                     5.8             65.7             75.7
: 10. Reasons For Restrictions, If Any:
: 21. Unit Capacity Factor (Using MDC Net)                         0.0             56.3             67.7
None This Month Yr-to-Date Cumulative *
: 22. Unit Capacity Factor (Using DER Net)                         0.0             55.6             ff
: 11. Hours In Reporting Period 744.0 8760.0 14494.3
: 23. Unit Forced Outage Rate                                   12.6                 1.1               6.1
: 12. Number Of Hours Reactor Was Critical 227.0 5967.4 11265.7
: 13. Reactor Reserve Shutdown Hours 0.0 0.0 0.0
: 14. Hours Generator On-Line 43.3 5758.2 10965.4
: 15. Unit Reserve Shutdown Hours 0.0 0.0 0.0
: 16. Gross Thermal Energy Generated (MWH) 48788 16976617 33542069
: 17. Gross Electrical Energy Generated (MWH) 11200 5619400 11133732
: 18. Het Electrical Energy Generated (MWH)
-10482
** 5293477
*'10527811
: 19. Unit Service Factor 5.8 65.7 75.7
: 20. Unit Availability Factor 5.8 65.7 75.7
: 21. Unit Capacity Factor (Using MDC Net) 0.0 56.3 67.7
: 22. Unit Capacity Factor (Using DER Net) 0.0 55.6 ff
: 23. Unit Forced Outage Rate 12.6 1.1 6.1
: 24. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each):
: 24. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each):
N/A 25.
If Shut Down At End Of Report Period, Est. Date of Start-up:
N/A
: 26. Units In Test Status (Prior to Commercial Operation):
N/A
N/A
: 25. If Shut Down At End Of Report Period, Est. Date of Start-up:                          N/A
: 26. Units In Test Status (Prior to Commercial Operation):                                N/A
* As of commercial operation on 5-7-85 at 0243.
* As of commercial operation on 5-7-85 at 0243.
  *8 - 1 time correction of +10 MW hrs. missed in April 1986.
*8 - 1 time correction of +10 MW hrs. missed in April 1986.
  ** - 1 time correction of +100 MW hrs. missed in July 1985.
** - 1 time correction of +100 MW hrs. missed in July 1985.
M0.RPT
M0.RPT


DPERATING DATA REPORT DOCKET NO.       50-323 DATE       01/05/87 COMPLETED BY         A.T. Keller TELEPHONE       (805)S95-7351 OPERATING STATUS
DPERATING DATA REPORT DOCKET NO.
: 1. Unit Name:     Diablo Canyon Unit 2
50-323 DATE 01/05/87 COMPLETED BY A.T. Keller TELEPHONE (805)S95-7351 OPERATING STATUS 1.
: 2. Reporting Period:     December 1986
Unit Name:
: 3. Licensed Thermal Power (MWt):       3411
Diablo Canyon Unit 2 2.
: 4. Nameplate Rating (Gross MWe):       1164
Reporting Period:
: 5. Design Electrical Rating (Net MWe):       1119
December 1986 3.
' 6. Maximum Dependable Capacity (Gross MWe): 1130
Licensed Thermal Power (MWt):
: 7. Maximum Dependable Capacity (Net MWe):       '1079
3411 4.
: 8. If Changes Occur in Capacity Ratings (Items Number 3 Through 7) Since Last Report, Give Reasons:
Nameplate Rating (Gross MWe):
1164 5.
Design Electrical Rating (Net MWe):
1119
' 6.
Maximum Dependable Capacity (Gross MWe):
1130 7.
Maximum Dependable Capacity (Net MWe):
'1079 8.
If Changes Occur in Capacity Ratings (Items Number 3 Through 7) Since Last Report, Give Reasons:
N/A 9.
Power Level To Which Restricted, If Any (Net MWe):
N/A
N/A
: 9. Power Level To Which Restricted, If Any (Net MWe):                N/A
: 10. Reasons For Restrictions, If Any:
: 10. Reasons For Restrictions, If Any:             None This Month         Yr-to-Date*       Cumulative *
None This Month Yr-to-Date*
: 11. Hours In Reporting Period                                 744.0             7053.0         7053.0
Cumulative *
: 12. ' Number Of Hours Reactor Was Critical                     744.0             6857.0         6857.0
: 11. Hours In Reporting Period 744.0 7053.0 7053.0
: 13. Reactor Reserve Shutdown Hours                                   0.0           0.0             0.0
: 12. ' Number Of Hours Reactor Was Critical 744.0 6857.0 6857.0
: 14. Hours Generator On-Line                                   744.0             6730.4         6730.4
: 13. Reactor Reserve Shutdown Hours 0.0 0.0 0.0
: 15. Unit Reserve Shutdosn Hours                                     0.0           0.0             0.0
: 14. Hours Generator On-Line 744.0 6730.4 6730.4
: 16. Gross Thermal Energy Generated (MWH)                   2399835         21080719         21080719
: 15. Unit Reserve Shutdosn Hours 0.0 0.0 0.0
: 17. Gross Electrical Energy Generated (MWH)                 794100           6912499         6912499
: 16. Gross Thermal Energy Generated (MWH) 2399835 21080719 21080719
: 18. Net Electrical Energy Generated (MWH)                   753397           6548174         6548174
: 17. Gross Electrical Energy Generated (MWH) 794100 6912499 6912499
: 19. Unit Service factor                                       100.0               95.4           95.4
: 18. Net Electrical Energy Generated (MWH) 753397 6548174 6548174
: 20. Unit Availability Factor                                   100.0               95.4           95.4
: 19. Unit Service factor 100.0 95.4 95.4
: 21. Unit Capacity factor (Using MDC Net)                         93.8             86.0           86.0
: 20. Unit Availability Factor 100.0 95.4 95.4
: 22. Unit Capacity Factor (Using DER Net)                         90.5             83.0           83.0
: 21. Unit Capacity factor (Using MDC Net) 93.8 86.0 86.0
: 23. Unit Forced Outage Rate                                         0.0           4.6             4.6
: 22. Unit Capacity Factor (Using DER Net) 90.5 83.0 83.0
: 23. Unit Forced Outage Rate 0.0 4.6 4.6
: 24. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each):
: 24. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each):
Unit 2 Refueling Outage, April 1, 1987, 10 weeks
Unit 2 Refueling Outage, April 1, 1987, 10 weeks 25.
: 25. If Shut Down At End Of Report Period, Est. Date of Start-up:                 N/A
If Shut Down At End Of Report Period, Est. Date of Start-up:
: 26. Units In Test Status (Prior to Commercial Operation):                         N/A
N/A
: 26. Units In Test Status (Prior to Commercial Operation):
N/A
* Year-to-date, and cumulative totals started March 13, 1986 at 0300 PST (Date of commercial operation)
* Year-to-date, and cumulative totals started March 13, 1986 at 0300 PST (Date of commercial operation)
M0.FPT
M0.FPT


e_ -
e_ -
AVERAGE DAILY UNIT POWER LEVEL DOCKET N0. 50-275 UNIT   Diablo Canyon Unit 1 DATE _0_1/05/87 COMPLETED BY   A.T. Keller TELEPHONE   (805)S95-7351 MONTH December 1986 DAY     AVERAGE DAILY POWER LEVEL                 DAY           AVERAGE DAILY POWER LEVEL (We-Net)                                                 (We-Net) 1                 -12                           17                       -37 2                 -13                           18                       -37 3                 -12                           19                       -36 4                 -13                           20                       -34 5                 -16                           21                       -34
AVERAGE DAILY UNIT POWER LEVEL DOCKET N0.
                                    -9 6                                                22                       -34 7                 -21                           23                       -35 8                 -25                           24                       -36 9                 -29                           25                       -38 10                 -25                           26                       -36 11                 -33                           27                         -34 12                 -34                           28                         -26             _
50-275 UNIT Diablo Canyon Unit 1 DATE _0_1/05/87 COMPLETED BY A.T. Keller TELEPHONE (805)S95-7351 MONTH December 1986 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (We-Net)
13                -35                           29                         -25 14                 -37                           30                         124 15                 -37                           31                       267 16                 -37 INSTRUCTIONS On this format, list the average daily unit power level in MWe-Net for each day in the reporting month. Compute to the nearest whole megawatt.
(We-Net) 1
-12 17
-37 2
-13 18
-37 3
-12 19
-36 4
-13 20
-34 5
-16 21
-34 6
-9 22
-34 7
-21 23
-35 8
-25 24
-36 9
-29 25
-38 10
-25 26
-36 11
-33 27
-34 12
-34 28
-26 13
-35 29
-25 14
-37 30 124 15
-37 31 267 16
-37 INSTRUCTIONS On this format, list the average daily unit power level in MWe-Net for each day in the reporting month. Compute to the nearest whole megawatt.
l M0.RPT i
l M0.RPT i
i
i


AVERAGE DAILY UNIT POWER LEVEL DOCKET NO.       50-323 UNIT   Diablo Canyon Unit 2 DATE   01/05/87 COMPLETED BY           A.T. Keller TELEPHONE     (805)S95-7351 MONTH December 1986 DAY     AVERAGE DAIL'I POWER LEVEL             DAY         AVERAGE DAILY POWER LEVEL (We-Net)                                               (We-Net) 1                   1083                     17                       1086             __
AVERAGE DAILY UNIT POWER LEVEL DOCKET NO.
2                  1082                     18                       1087 3                   991                     19                       1084 4                   918                     20                       1083 5                   1004                     21                       1017 ,
50-323 UNIT Diablo Canyon Unit 2 DATE 01/05/87 COMPLETED BY A.T. Keller TELEPHONE (805)S95-7351 MONTH December 1986 DAY AVERAGE DAIL'I POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (We-Net)
6                    582                     22                       1087 7                   1083                     23                       1087 8                   1087                     24                       1083 9                   1092                     25                       1083 10                   1083                     26                       1083 11                   1079                     27                       1084 12                   1004                     28                       1044 13                   709                     29                         771 14                   1083                     30                       815 15                   1087                     31                       850 16                   1083 INSTRUCTIONS On this format,' list the average daily unit power level in MWe-Net for each day in the reporting month. Compute to the nearest whole megawatt.
(We-Net) 1 1083 17 1086 2
1082 18 1087 3
991 19 1084 4
918 20 1083 5
1004 21 1017 6
582 22 1087 7
1083 23 1087 8
1087 24 1083 9
1092 25 1083 10 1083 26 1083 11 1079 27 1084 12 1004 28 1044 13 709 29 771 14 1083 30 815 15 1087 31 850 16 1083 INSTRUCTIONS On this format,' list the average daily unit power level in MWe-Net for each day in the reporting month. Compute to the nearest whole megawatt.
M0.RPT
M0.RPT


UNIT SHUTDOWNS                                                         .
UNIT SHUTDOWNS P ge 1 cf I DOCKET NO.
P ge 1 cf I                   DOCKET NO.         50-275 UNIT NAME       Diablo Cartyon Unit 1 DATE     01/05/87             -
50-275 UNIT NAME Diablo Cartyon Unit 1 DATE 01/05/87 COMPLETED BY M.T. HUG REPORT MONTH DECUEER 1986 TELEPHONE (805)S95-7351 cense Method of Duration Event System Component Action to l
COMPLETED BY         M.T. HUG REPORT MONTH DECUEER 1986                 TELEPHONE       (805)S95-7351 Method of cense    System Component Duration                            Event                                          Action to No.           Date       Type l      (Hours)   Reason 2  Shutdown3    Report i   Code 4
2 3
Code 5
4 5
Prevent Recurrence 1           8/29/86       S         700.7       C           4           N/A       N/A       N/A     Diablo Canyon Unit I completed its first refueling outage which ended on December 29, 1986.
No.
Date Type (Hours)
Reason Shutdown Report i Code Code Prevent Recurrence 1
8/29/86 S
700.7 C
4 N/A N/A N/A Diablo Canyon Unit I completed its first refueling outage which ended on December 29, 1986.
L i
L i
4 l
4 l
1                             2                                                 3                           4 F: Forced                       Reason:                                           Method:                     Exhibit G - Instructions 1             S: Scheduled                   A-Equipment Failure (Explain)                     1-Manual                     for Preparation of Data
1 2
{                                             B-Maintenance or Test                             2-Manual Scram               Entry Sheets for Licensee C-Refueling                                       3-Automatic Scram           Event Report (LER) File D-Regulatory Restriction                         4-Continuation from         (NUREG-1022)
3 4
,                                            E-Operator Training & License Examination           previous month F-Administrative                                 5-Power reduction         5 G-Operational Error (Explain)                     6,7,8-M/A                   Exhibit I - Same Source
F: Forced Reason:
;                                            H-Other (Explain)                               9-Other MO.RPT
Method:
Exhibit G - Instructions 1
S: Scheduled A-Equipment Failure (Explain) 1-Manual for Preparation of Data
{
B-Maintenance or Test 2-Manual Scram Entry Sheets for Licensee C-Refueling 3-Automatic Scram Event Report (LER) File D-Regulatory Restriction 4-Continuation from (NUREG-1022)
E-Operator Training & License Examination previous month F-Administrative 5-Power reduction 5
G-Operational Error (Explain) 6,7,8-M/A Exhibit I - Same Source H-Other (Explain) 9-Other MO.RPT


s UNIT SHUTDOWS                                                       -
s UNIT SHUTDOWS Page 1 of 1 DOCKET No.
Page 1 of 1                   DOCKET No.       50-323
50-323 UNIT NAE Diablo Canyon Unit ?
                                                                                              . UNIT NAE       Diablo Canyon Unit ?
DATE 01/05/87 COWLETED BY M.T. HUG REPORT MONTH DECEMER 1986 TELEPHONE (805)S95-7351 censee ause & Corrective Duration Event System Component Action to Method of l
DATE       01/05/87 COWLETED BY       M.T. HUG REPORT MONTH DECEMER 1986                 TELEPHONE       (805)S95-7351 Method of censee System Component ause & Corrective Duration                               Event                                         Action to 2                               4         5 No. Date   Type l  (Hours)         Reason   Shutdown 3    Report i   Code       Code               Prevent Recurrence None 1
2 3
4 5
No.
Date Type (Hours)
Reason Shutdown Report i Code Code Prevent Recurrence None 1
.I t
.I t
1                   2                                                   3                         4 i
1 2
F: Forced           Reason:                                             Method:                   Exhibit G - Instructions i       S: Scheduled       A-Equipment Failure (Explain)                         1-Manual                 for Preparation of Data
3 4
;                            B-Maintenance or Test                               2-Manual Scram           Entry Sheets for Licensee i                             C-Refueling                                         3-Automatic Scram         Event Report (LER) File D-Regulatory Restriction                             4-Continuation from       (NUREG-1022)
F: Forced Reason:
E-Operator Training & License Examination             previous month i                             F-Administrative                                     5-Power reduction       5 j                           G-Operational Error (Explain)                         6,7,8-N/A                 Exhibit 1 - Same Source j                           H-Other(Explain)                                   9-Other                       -
Method:
;    M0.RPT
Exhibit G - Instructions i
i S: Scheduled A-Equipment Failure (Explain) 1-Manual for Preparation of Data B-Maintenance or Test 2-Manual Scram Entry Sheets for Licensee i
C-Refueling 3-Automatic Scram Event Report (LER) File D-Regulatory Restriction 4-Continuation from (NUREG-1022)
E-Operator Training & License Examination previous month i
F-Administrative 5-Power reduction 5
j G-Operational Error (Explain) 6,7,8-N/A Exhibit 1 - Same Source j
H-Other(Explain) 9-Other M0.RPT


i PACIFIC GAS AND E LE C T RIC C O M PANY                                                           i
i PACIFIC GAS AND E LE C T RIC C O M PANY i
                                ,        OlABLO CANYON POWER PLANT
OlABLO CANYON POWER PLANT
[gglllllllj                 i         PO. Box 56. Avila Beach, Cahfornia 93424 * (805) 595-7351 l
[gglllllllj i
RC.THORNBERRY PLANT MANAGER January 13, 1987 1
PO. Box 56. Avila Beach, Cahfornia 93424 * (805) 595-7351 l
U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 RE:     Docket No. 50-275 and 50-323 License No. DPR-80 and DPR-82 Monthly Operating Report for December,1986 Gentlemen:
RC.THORNBERRY PLANT MANAGER January 13, 1987 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 RE:
Docket No. 50-275 and 50-323 License No. DPR-80 and DPR-82 Monthly Operating Report for December,1986 Gentlemen:
Enclosed are the completed monthly operating report forms for Diablo Canyon Units 1 and 2 for December, 1986. This report is submitted in accordance with Section 6.9.1.7 of the Units 1 and 2 Technical Specifications.
Enclosed are the completed monthly operating report forms for Diablo Canyon Units 1 and 2 for December, 1986. This report is submitted in accordance with Section 6.9.1.7 of the Units 1 and 2 Technical Specifications.
Sincerely,
Sincerely,
                                                $0f ROBERT C. THORNBERRY b
$0f ROBERT C. THORNBERRY b
RCT:lm Enclosures cc Mr. John B. Martin, Regional Administrator Region V - USNRC l
RCT:lm Enclosures cc Mr. John B. Martin, Regional Administrator Region V - USNRC l/ $
                                                                                                  /$
DC0455 i}}
DC0455 i}}

Latest revision as of 06:07, 4 December 2024

Monthly Operating Repts for Dec 1986
ML20212G712
Person / Time
Site: Diablo Canyon  
Issue date: 12/31/1986
From: Keller A, Thornberry R
PACIFIC GAS & ELECTRIC CO.
To:
NRC OFFICE OF ADMINISTRATION (ADM)
References
NUDOCS 8701210139
Download: ML20212G712 (9)
v • d • e


Text

. _.

g.-

MONTHLY NARRATIVE REPORT OF OPERATION AND MAJOR MAINTENANCE EXPERIENCE This report describes the operating and taajor maintenance experience for-tie month of December,1986. This narrative report was prepared by the plant staff and is submitted in accordance with Section 6.9.1.7 of the Units'1 and 2 Technical Specifications.

On December 1, 1986 Unit I started the month shutdown in its first refueling outage. Unit 2 started the month at full power.

On December 3, 1986 Unit 2 reduced power to 50% to search for leaking condenser tubes.

On December 4, 1986 Unit 2 returned to full power.

On December 5, 1986 Unit 2 reduced power to 50% to search for leaking condenser tubes.

On December 6, 1986 Unit 2 returned to full power.

On December 9, 1986 Unit 1 entered Mode 4.

@ December 11, 1986 Unit 1 entered Mode 3.

On December 12, 1986 Unit 2 reduced power to 50% to search for leaking condenser tubes.

On December 13, 1986 Unit 2 returned to full power after plugging leaking condenser tubes.

On December 20, 1986 Unit 1 entered Mode 2.

On December 27, 1986 Unit 1 entered Mode 1.

On December 28, 1986 During the Unit 1 startup a reactor trip resulted from a steam flow /feedwater flow mismatch i

l coincident with a low steam generator level.

While stabilizing the plant, Unit 1 experienced a second reactor trip due to low-low steam generator level.

On December 29, 1986 Unit I synchronized to the PGandE system. Unit 2 reduced power to 50% to search for leaking l

condenser tubes and later returned to 85% power l

which was the maximum power level that could be achieved without incurring tube leakage.

On December 31, 1986 Unit 1 ended the month at 30% while performing startup tests. Unit 2 ended the month with power at 85%.

8701210139 861231 DR ADOCK 0500 5

7 M0.RPT

/p

Unit I completed its first refueling outage which started August 29. On December 28, while disconnected from the PGandE system and at apprcximately 7% reactor power for turbine balancing, Unit 1 experienced a reactor trip.

During return to Mode 3 the turbine generator governor valves were closed.

Closing of the turbine generator governor valves lead to an increase in steam generator pressure. The increase in steam generator pressure caused one steam generator level to decrease to the low steam generator level trip setpoint. Also at this time, the 10 percent steam generator dump valves opened intermittently due to increasing steam generator pressure. The resulting change in steam flow through the steam dump system resulted in a momentary steam flow / feed flow mismatch signal. The low steam generator level in coincidence with the steam flow / feed flow mismatch caused a reactor trip.

While stabilizing the plant after the reactor trip, the reactor trip breakers were closed to allow latching of the turbine generator. Latching of the barbine generator allows the turbine generator stop pilot valves to close. Closing of the piloi valves therefore reduces the plant cooldown rate. During plant stabilization a low-low steam generator level reactor trip signal occurred, opening the reactor trip breakers. The Unit was not critical during the second reactor trip.

Unit I was synchronized to the PGandE system on December 29.

The Unit 1 monthly availability factor was 5.8% and the capacity factor was 0.0%.

Unit 2 operated this month with a unit availability factor of 100% and a unit capacity factor of 93.8%. Unit 2 reduced power 4 times this month. I time to search and plug leaking tubes and 3 additional times to search for leaking tubes.

No challenges to the steam generator safety valves or pressurizer power operated relief valves have been made. Significant Unit 1 safety related maintenance consisted of snubber washer inspections and the replacement of detectors NE-51 and N-42.

Unit 2 safety related maintenance consisted of a seal replacement on centrifugal charging pump 2-2.

MO.RPI

OPERATING DATA REPORT DOCKET N0.

50-275 DATE 01/05/87 COMPLETED BY A.T. Keller TELEPHONE (805)595-7351 OPERATING STATUS 1.

Unit Name:

Diablo Canyon Unit 1 2.

Reporting Period:

December 1986 3.

Licensed Thermal Power (MWt):

3338 4.

Nameplate Rating (Gross MWe):

1137 5.

Design Electrical Rating (Net MWe):

1086 6.

Maximum Dependable Capacity (Gross MWe):

1125 7.

Maximum Dependable Capacity (Net MWe):

1073 8.

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

~~

N/A 1

9.

Power Level To Which Restricted, If Any (Net MWe):

N/A

10. Reasons For Restrictions, If Any:

None This Month Yr-to-Date Cumulative *

11. Hours In Reporting Period 744.0 8760.0 14494.3
12. Number Of Hours Reactor Was Critical 227.0 5967.4 11265.7
13. Reactor Reserve Shutdown Hours 0.0 0.0 0.0
14. Hours Generator On-Line 43.3 5758.2 10965.4
15. Unit Reserve Shutdown Hours 0.0 0.0 0.0
16. Gross Thermal Energy Generated (MWH) 48788 16976617 33542069
17. Gross Electrical Energy Generated (MWH) 11200 5619400 11133732
18. Het Electrical Energy Generated (MWH)

-10482

    • 5293477
  • '10527811
19. Unit Service Factor 5.8 65.7 75.7
20. Unit Availability Factor 5.8 65.7 75.7
21. Unit Capacity Factor (Using MDC Net) 0.0 56.3 67.7
22. Unit Capacity Factor (Using DER Net) 0.0 55.6 ff
23. Unit Forced Outage Rate 12.6 1.1 6.1
24. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each):

N/A 25.

If Shut Down At End Of Report Period, Est. Date of Start-up:

N/A

26. Units In Test Status (Prior to Commercial Operation):

N/A

  • As of commercial operation on 5-7-85 at 0243.
  • 8 - 1 time correction of +10 MW hrs. missed in April 1986.
    • - 1 time correction of +100 MW hrs. missed in July 1985.

M0.RPT

DPERATING DATA REPORT DOCKET NO.

50-323 DATE 01/05/87 COMPLETED BY A.T. Keller TELEPHONE (805)S95-7351 OPERATING STATUS 1.

Unit Name:

Diablo Canyon Unit 2 2.

Reporting Period:

December 1986 3.

Licensed Thermal Power (MWt):

3411 4.

Nameplate Rating (Gross MWe):

1164 5.

Design Electrical Rating (Net MWe):

1119

' 6.

Maximum Dependable Capacity (Gross MWe):

1130 7.

Maximum Dependable Capacity (Net MWe):

'1079 8.

If Changes Occur in Capacity Ratings (Items Number 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:

None This Month Yr-to-Date*

Cumulative *

11. Hours In Reporting Period 744.0 7053.0 7053.0
12. ' Number Of Hours Reactor Was Critical 744.0 6857.0 6857.0
13. Reactor Reserve Shutdown Hours 0.0 0.0 0.0
14. Hours Generator On-Line 744.0 6730.4 6730.4
15. Unit Reserve Shutdosn Hours 0.0 0.0 0.0
16. Gross Thermal Energy Generated (MWH) 2399835 21080719 21080719
17. Gross Electrical Energy Generated (MWH) 794100 6912499 6912499
18. Net Electrical Energy Generated (MWH) 753397 6548174 6548174
19. Unit Service factor 100.0 95.4 95.4
20. Unit Availability Factor 100.0 95.4 95.4
21. Unit Capacity factor (Using MDC Net) 93.8 86.0 86.0
22. Unit Capacity Factor (Using DER Net) 90.5 83.0 83.0
23. Unit Forced Outage Rate 0.0 4.6 4.6
24. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each):

Unit 2 Refueling Outage, April 1, 1987, 10 weeks 25.

If Shut Down At End Of Report Period, Est. Date of Start-up:

N/A

26. Units In Test Status (Prior to Commercial Operation):

N/A

  • Year-to-date, and cumulative totals started March 13, 1986 at 0300 PST (Date of commercial operation)

M0.FPT

e_ -

AVERAGE DAILY UNIT POWER LEVEL DOCKET N0.

50-275 UNIT Diablo Canyon Unit 1 DATE _0_1/05/87 COMPLETED BY A.T. Keller TELEPHONE (805)S95-7351 MONTH December 1986 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (We-Net)

(We-Net) 1

-12 17

-37 2

-13 18

-37 3

-12 19

-36 4

-13 20

-34 5

-16 21

-34 6

-9 22

-34 7

-21 23

-35 8

-25 24

-36 9

-29 25

-38 10

-25 26

-36 11

-33 27

-34 12

-34 28

-26 13

-35 29

-25 14

-37 30 124 15

-37 31 267 16

-37 INSTRUCTIONS On this format, list the average daily unit power level in MWe-Net for each day in the reporting month. Compute to the nearest whole megawatt.

l M0.RPT i

i

AVERAGE DAILY UNIT POWER LEVEL DOCKET NO.

50-323 UNIT Diablo Canyon Unit 2 DATE 01/05/87 COMPLETED BY A.T. Keller TELEPHONE (805)S95-7351 MONTH December 1986 DAY AVERAGE DAIL'I POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (We-Net)

(We-Net) 1 1083 17 1086 2

1082 18 1087 3

991 19 1084 4

918 20 1083 5

1004 21 1017 6

582 22 1087 7

1083 23 1087 8

1087 24 1083 9

1092 25 1083 10 1083 26 1083 11 1079 27 1084 12 1004 28 1044 13 709 29 771 14 1083 30 815 15 1087 31 850 16 1083 INSTRUCTIONS On this format,' list the average daily unit power level in MWe-Net for each day in the reporting month. Compute to the nearest whole megawatt.

M0.RPT

UNIT SHUTDOWNS P ge 1 cf I DOCKET NO.

50-275 UNIT NAME Diablo Cartyon Unit 1 DATE 01/05/87 COMPLETED BY M.T. HUG REPORT MONTH DECUEER 1986 TELEPHONE (805)S95-7351 cense Method of Duration Event System Component Action to l

2 3

4 5

No.

Date Type (Hours)

Reason Shutdown Report i Code Code Prevent Recurrence 1

8/29/86 S

700.7 C

4 N/A N/A N/A Diablo Canyon Unit I completed its first refueling outage which ended on December 29, 1986.

L i

4 l

1 2

3 4

F: Forced Reason:

Method:

Exhibit G - Instructions 1

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

{

B-Maintenance or Test 2-Manual Scram Entry Sheets for Licensee C-Refueling 3-Automatic Scram Event Report (LER) File D-Regulatory Restriction 4-Continuation from (NUREG-1022)

E-Operator Training & License Examination previous month F-Administrative 5-Power reduction 5

G-Operational Error (Explain) 6,7,8-M/A Exhibit I - Same Source H-Other (Explain) 9-Other MO.RPT

s UNIT SHUTDOWS Page 1 of 1 DOCKET No.

50-323 UNIT NAE Diablo Canyon Unit ?

DATE 01/05/87 COWLETED BY M.T. HUG REPORT MONTH DECEMER 1986 TELEPHONE (805)S95-7351 censee ause & Corrective Duration Event System Component Action to Method of l

2 3

4 5

No.

Date Type (Hours)

Reason Shutdown Report i Code Code Prevent Recurrence None 1

.I t

1 2

3 4

F: Forced Reason:

Method:

Exhibit G - Instructions i

i S: Scheduled A-Equipment Failure (Explain) 1-Manual for Preparation of Data B-Maintenance or Test 2-Manual Scram Entry Sheets for Licensee i

C-Refueling 3-Automatic Scram Event Report (LER) File D-Regulatory Restriction 4-Continuation from (NUREG-1022)

E-Operator Training & License Examination previous month i

F-Administrative 5-Power reduction 5

j G-Operational Error (Explain) 6,7,8-N/A Exhibit 1 - Same Source j

H-Other(Explain) 9-Other M0.RPT

i PACIFIC GAS AND E LE C T RIC C O M PANY i

OlABLO CANYON POWER PLANT

[gglllllllj i

PO. Box 56. Avila Beach, Cahfornia 93424 * (805) 595-7351 l

RC.THORNBERRY PLANT MANAGER January 13, 1987 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 RE:

Docket No. 50-275 and 50-323 License No. DPR-80 and DPR-82 Monthly Operating Report for December,1986 Gentlemen:

Enclosed are the completed monthly operating report forms for Diablo Canyon Units 1 and 2 for December, 1986. This report is submitted in accordance with Section 6.9.1.7 of the Units 1 and 2 Technical Specifications.

Sincerely,

$0f ROBERT C. THORNBERRY b

RCT:lm Enclosures cc Mr. John B. Martin, Regional Administrator Region V - USNRC l/ $

DC0455 i

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