ML20199D007: Difference between revisions

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=Text=
=Text=
{{#Wiki_filter:f' '
{{#Wiki_filter:f' AVERAGE DAILY UNIT POWER LEVEL DOCKET NO.
AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-293 UNIT       Pilgrim i DATE       6/11/86 COMPLETED BY P. Hamiiton
50-293 UNIT Pilgrim i DATE 6/11/86 COMPLETED BY P. Hamiiton
                                                            -TELEPHONE (617)746-7900 MONTH     May 1986 DAY     AVERAGE DAILY POWER LEVEL   DAY     AVERAGE DAILY POWER LEVEL (MWe-Net)                           (MWe-Net) 1                   0.             17                   0.
-TELEPHONE (617)746-7900 MONTH May 1986 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net)
2                   0.             18                   0.
(MWe-Net) 1 0.
3                   0.             19                   0.
17 0.
4                   0.             20                   0.
2 0.
5                   0.             21                   0.
18 0.
6                   0.             22                   0.
3 0.
7                   0.             23                   0.
19 0.
8                   0.             24                   9.
4 0.
9                   0.             25                   0.
20 0.
10                   0.             26                   0.
5 0.
11                   0.             27                   0.
21 0.
12                   0.             28                   0.
6 0.
13                   0.             29                   0.           ,
22 0.
14                   0.             30                   0.
7 0.
15                   0               31                   0.
23 0.
16                   0.
8 0.
24 9.
9 0.
25 0.
10 0.
26 0.
11 0.
27 0.
12 0.
28 0.
13 0.
29 0.
14 0.
30 0.
15 0
31 0.
16 0.
This format, lists the average daily unit power level in MWe-Net for each day in the reporting month, computed to the nearest whole megawatt.
This format, lists the average daily unit power level in MWe-Net for each day in the reporting month, computed to the nearest whole megawatt.
8606180471 860531 3 DR   ADOCK 0500
8606180471 860531 DR ADOCK 0500 3


r     .
r OPERATING DATA REPORT DOCKET NO.
OPERATING DATA REPORT DOCKET NO.         50-293 -
50-293 -
DATE               6/11/86 ~~
DATE 6/11/86 ~~
COMPLETED BY   P. Hamilton TELEPHONE       (617)746-7900 OPERATING STATUS
COMPLETED BY P. Hamilton TELEPHONE (617)746-7900 OPERATING STATUS 1.
: 1. Unit Name                 Pilgrim 1                         Notes
Unit Name Pilgrim 1 Notes 2.
: 2. Reporting Period         May 1986
Reporting Period May 1986 3.
: 3. Licensed Thermal Power (MHt)             1998
Licensed Thermal Power (MHt) 1998 4.
: 4. Nameplate Rating (Gross MWe)               678
Nameplate Rating (Gross MWe) 678 5.
: 5. Design Electrical Rating (Net MHe)         655
Design Electrical Rating (Net MHe) 655 6.
: 6. Maximum Dependable Capacity (Gross MWe)     690
Maximum Dependable Capacity (Gross MWe) 690 7.
: 7. Maximum Dependable Capacity (Net MWe)       670
Maximum Dependable Capacity (Net MWe) 670 8.
: 8. If Changes Occur in Capacity Ratings (Items Number 3 Through 7) Since Last Report, Give Reasons:
If Changes Occur in Capacity Ratings (Items Number 3 Through 7) Since Last Report, Give Reasons:
None 9.
Power Level To Which Restricted, If Any (Net MWe)
None
None
: 9. Power Level To Which Restricted, If Any (Net MWe)        None
: 10. Reasons For Restrictions, If Any N/A This Month Yr-to-Date Cumulative.
: 10. Reasons For Restrictions, If Any                           N/A This Month Yr-to-Date Cumulative.
: 11. Hours In Reporting Period 744.0 3623.0 118127.0
: 11. Hours In Reporting Period                       744.0       3623.0     118127.0
: 12. Number Of Hours Reactor Has Critical 0.0 1715.5 -
: 12. Number Of Hours Reactor Has Critical             0.0       1715.5 -   79791.1
79791.1
: 13. Reactor Reserve Shutdown Hours                   0.0           0.0         0.0
: 13. Reactor Reserve Shutdown Hours 0.0 0.0 0.0
: 14. Hours Generator On-Line                           0.0       1646.0 ~   77229.3
: 14. Hours Generator On-Line 0.0 1646.0 ~
: 15. Unit Reserve Shutdown Hours                       0.0           0.0         0.0
77229.3
: 16. Gross Thermal Energy Generated (MWH)             0.0     3094416.0 I34999880.0
: 15. Unit Reserve Shutdown Hours 0.0 0.0 0.0
: 17. Gross Electrical Energy Generated (MHH)           0.0     1068000.0 _45444604.0
: 16. Gross Thermal Energy Generated (MWH) 0.0 3094416.0 I34999880.0
: 18. Net Electrical Energy Generated (MHH)             0.0     1027531.0 _43675429.0
: 17. Gross Electrical Energy Generated (MHH) 0.0 1068000.0 _45444604.0
: 19. Unit Service Factor                               0.0           45.4       65.4
: 18. Net Electrical Energy Generated (MHH) 0.0 1027531.0 _43675429.0
: 20. Unit Availability Factor                         0.0           45.4       65.4
: 19. Unit Service Factor 0.0 45.4 65.4
: 21. Unit Capacity Factor (Using MDC Net)             0.0           42.3       55.2
: 20. Unit Availability Factor 0.0 45.4 65.4
: 22. Unit Capacity Factor (Using DER Net)             00           43.3       56.4
: 21. Unit Capacity Factor (Using MDC Net) 0.0 42.3 55.2
: 23. Unit Forced Outage Rate                         100.0           53.8         10.8
: 22. Unit Capacity Factor (Using DER Net) 00 43.3 56.4
: 23. Unit Forced Outage Rate 100.0 53.8 10.8
: 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):
None
None
: 25. If Shut Down At End Of Report Period, Estimated Date of Startup 7/13/86
: 25. If Shut Down At End Of Report Period, Estimated Date of Startup 7/13/86
: 26. Units In Test Status (Prior to Commercial Operation):
: 26. Units In Test Status (Prior to Commercial Operation):
Forecast   Achieved INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATION (9/77)
Forecast Achieved INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATION (9/77)


REFUELING INFORMATION The following refueling information is included in the Monthly Report as requested in an NRC letter to BECo, dated January 18, 1978:
REFUELING INFORMATION The following refueling information is included in the Monthly Report as requested in an NRC letter to BECo, dated January 18, 1978:
For your convenience, the'information supplied has been enumerated so that each number. corresponds to equivalent notation utilized in the request.
For your convenience, the'information supplied has been enumerated so that each number. corresponds to equivalent notation utilized in the request.
: 1. The name of this facility is Pilgrim Nuclear Power Station, Docket Number 50-293.
1.
: 2. Scheduled date for next Refueling Shutdown:     January 1987
The name of this facility is Pilgrim Nuclear Power Station, Docket Number 50-293.
: 3. Scheduled date for restart following refueling: March 1987
2.
: 4. Due to their similarity, requests 4, 5, & 6 are responded to collectively under #6:
Scheduled date for next Refueling Shutdown:
: 5. See #6.
January 1987 3.
: 6. The new fuel, which was loaded during the 1983-84 refueling outage, is of the same P8x8R design as loaded the previous outage and consists of 160 P80RB282 assemblies. In addition, 32 GE68-P80RB282 assemblies were also loaded.
Scheduled date for restart following refueling: March 1987 4.
: 7. (a) There are 580 fuel assemblies in the core.
Due to their similarity, requests 4, 5, & 6 are responded to collectively under #6:
5.
See #6.
6.
The new fuel, which was loaded during the 1983-84 refueling outage, is of the same P8x8R design as loaded the previous outage and consists of 160 P80RB282 assemblies.
In addition, 32 GE68-P80RB282 assemblies were also loaded.
7.
(a) There are 580 fuel assemblies in the core.
(b) There are 1,128 fuel assemblies in the spent fuel pool.
(b) There are 1,128 fuel assemblies in the spent fuel pool.
: 8. (a) The station is presently licensed to store 2320 spent fuel assemblies. The actual usable spent fuel storage capacity is 2320 fuel assemblies.
8.
(a) The station is presently licensed to store 2320 spent fuel assemblies.
The actual usable spent fuel storage capacity is 2320 fuel assemblies.
(b) The planned spent fuel storage capacity is 2320 fuel assemblies.
(b) The planned spent fuel storage capacity is 2320 fuel assemblies.
: 9. With present spent fuel in storage, the spent fuel pool now has the capacity to accommodate an additional 1192 fuel assemblies.
9.
With present spent fuel in storage, the spent fuel pool now has the capacity to accommodate an additional 1192 fuel assemblies.


BOSTON EDISON COMPANY PILGRIM NUCLEAR POWER STATION DOCKET NO. 50-293 Operational Summary for May 1986 The Unit remained shutdown throughout the month. During th'e month maintenance activity on RHR valves, main steam line isolation valves, and primary containment isolation system logic circuitry continued.
BOSTON EDISON COMPANY PILGRIM NUCLEAR POWER STATION DOCKET NO. 50-293 Operational Summary for May 1986 The Unit remained shutdown throughout the month. During th'e month maintenance activity on RHR valves, main steam line isolation valves, and primary containment isolation system logic circuitry continued.
On the sixteenth a work stoppage by union personnel occurred when the existing contract expired and agreement on a new contract could not be reached. Qualifted management personnel have assumed the duties normally performed by union workers.
On the sixteenth a work stoppage by union personnel occurred when the existing contract expired and agreement on a new contract could not be reached. Qualifted management personnel have assumed the duties normally performed by union workers.
Restart of the unit is pending Boston Edison's supplemental response to Confirmatory Action Letter 86-10 and subsequent NRC authorization. Existing plans are to maintain the unit in the shutdown condition for approximately six weeks beyond the completion of the current outage work to address additional hardware and administrative items.
Restart of the unit is pending Boston Edison's supplemental response to Confirmatory Action Letter 86-10 and subsequent NRC authorization.
Existing plans are to maintain the unit in the shutdown condition for approximately six weeks beyond the completion of the current outage work to address additional hardware and administrative items.
Safety Relief Valve Challenges Month of May 1986 Requirement: NUREG-0737 T.A.P. II.K.3.3 There were no safety relief valve challenges during the month.
Safety Relief Valve Challenges Month of May 1986 Requirement: NUREG-0737 T.A.P. II.K.3.3 There were no safety relief valve challenges during the month.


F UNIT SHUTDOWNS AND POWER REDUCTIONS         DOCKET-NO.               50-293'   i UNIT NAME               Pilcril 1 DATE                     6/11/86       *'
F UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET-NO.
COMPLETED BY           P. Hamilton TELEPHONE             (617)746-7900 REPORT MONTH   May 1986 METHOD OF       LICENSE                           CAUSE & CORRECTIVE DURATION             SHUTTING         EVENT     SYSTEM COMPONENT         ACTION TO NO. DATE     TYPE'   (HOURS) REASON'     DOWN REACTOR'     REPORT #     CODE'     CODE'     PREVENT RECURRENCE 08   5/1/86       F     744.0     A             1,3         86-008     BD       ISV           The unit remained (continued)                                                     86-009     BD       ISV           shutdown for maintenance on RHR valves, MSIV's, and PCIS logic cli cul try.
50-293' i
I             2                     2                 3                 4&5 F-forced A-Equip Failure             F-Admin         1-Manual         Exhibit F & H S-Sched   B-Maint or Test           G-Oper Error     2-Manual Scram     Instructions for C-Refueling               H-Other         3-Auto Scram     Preparation of D-Regulatory Restriction                   4-Continued       Data Entry Sheet E-Operator Training                       5-Reduced Load   Licensee Event Report
UNIT NAME Pilcril 1 DATE 6/11/86 COMPLETED BY P. Hamilton TELEPHONE (617)746-7900 REPORT MONTH May 1986 METHOD OF LICENSE CAUSE & CORRECTIVE DURATION SHUTTING EVENT SYSTEM COMPONENT ACTION TO NO.
                & License Examination                   9-Other           (LER) File (NUREG-1022)
DATE TYPE' (HOURS) REASON' DOWN REACTOR' REPORT #
CODE' CODE' PREVENT RECURRENCE 08 5/1/86 F
744.0 A
1,3 86-008 BD ISV The unit remained (continued) 86-009 BD ISV shutdown for maintenance on RHR valves, MSIV's, and PCIS logic cli cul try.
I 2
2 3
4&5 F-forced A-Equip Failure F-Admin 1-Manual Exhibit F & H S-Sched B-Maint or Test G-Oper Error 2-Manual Scram Instructions for C-Refueling H-Other 3-Auto Scram Preparation of D-Regulatory Restriction 4-Continued Data Entry Sheet E-Operator Training 5-Reduced Load Licensee Event Report
& License Examination 9-Other (LER) File (NUREG-1022)


Month   May 1986                                 '
Month May 1986 PILGRIM NUCLEAR POWER STATION
                                                                                                                                      ~ '
~ '
PILGRIM NUCLEAR POWER STATION MAJOR SAFETY RELATED MAINTENANCE CORRECTIVE ACTION SYSTEM         COMPONENT     MALFUNCTION     CAUSE             MAINTENANCE           TO PREVENT         ASSOCIATED RECURRENCE               LER Salt       Pump P-2038     Excessive       Out of             balanced           routine               N/R-Service                     Vibration       balance                               maintenance Water Primary     MO 1001-28B     Indicated       As found           Refurbished         - additional admin 86-009-01 Containment                 seat leakage     testing indica-       valve               controls           (to be issued)
MAJOR SAFETY RELATED MAINTENANCE CORRECTIVE ACTION SYSTEM COMPONENT MALFUNCTION CAUSE MAINTENANCE TO PREVENT ASSOCIATED RECURRENCE LER Salt Pump P-2038 Excessive Out of balanced routine N/R-Service Vibration balance maintenance Water Primary MO 1001-28B Indicated As found Refurbished
Isolation                                     ted seat                               - enhanced instru-System                                       leakage within                           mentation limits.                               - addition of Indicated leakage                         controlled discussed in                             leakoff in response to                               secondary system CAL 86-10 Core Spray MO 1400-4A       2 Motor Mount   Insufficient       Repaired in         Modified design       N/R bolts sheared   design             accordance         via PDC 86-32 with PDC 86-32 Main Steam A0-203-IA       Failed local     Scale build-up     Refurbished the     Continued moni-       86-011 Isolation   A0-203-2A       leak rate test on seats,           8 MSIV's           toring and imple-Valves     A0-203-ID                         normal wear,                           mentation (as A0-203-20                       and/or pilot                           appropriate) of A0-203-18                         poppet stem                           BWR owners group disassociation                         recommendations are probable causes Auxillary   Differential     Burnt Up       The non-seismic     Replaced coil       Seismic relays       86-013 Electrical Lock-out switch                   relay was         of lockout         to be installed via (to be issued) for Brkr 152-509                 jarred when         relay               PDC 85-47 (A Diesel Generator)             door to breaker cabinet was opened
- additional admin 86-009-01 Containment seat leakage testing indica-valve controls (to be issued)
Isolation ted seat
- enhanced instru-System leakage within mentation limits.
- addition of Indicated leakage controlled discussed in leakoff in response to secondary system CAL 86-10 Core Spray MO 1400-4A 2 Motor Mount Insufficient Repaired in Modified design N/R bolts sheared design accordance via PDC 86-32 with PDC 86-32 Main Steam A0-203-IA Failed local Scale build-up Refurbished the Continued moni-86-011 Isolation A0-203-2A leak rate test on seats, 8 MSIV's toring and imple-Valves A0-203-ID normal wear, mentation (as A0-203-20 and/or pilot appropriate) of A0-203-18 poppet stem BWR owners group disassociation recommendations are probable causes Auxillary Differential Burnt Up The non-seismic Replaced coil Seismic relays 86-013 Electrical Lock-out switch relay was of lockout to be installed via (to be issued) for Brkr 152-509 jarred when relay PDC 85-47 (A Diesel Generator) door to breaker cabinet was opened


EOSTON EDISON COMPANY 50D EOYLaTON STmtET 50sTON. MAssACHuarns 02199 WILLIAM D. HAMRINGTON esassen veas passement me .
EOSTON EDISON COMPANY 50D EOYLaTON STmtET 50sTON. MAssACHuarns 02199 WILLIAM D. HAMRINGTON esassen veas passement me.
June 11,1986 BECo Ltr. #86-078 Otrector Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.       20555 Attn: Document Control Desk                                                       j License No. DPR-35 Docket No. 50-293
June 11,1986 BECo Ltr. #86-078 Otrector Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Attn: Document Control Desk j
License No. DPR-35 Docket No. 50-293


==Subject:==
==Subject:==
Line 107: Line 149:


==Dear Sir:==
==Dear Sir:==
In accordance with PNPS Technical Specification 6.9.A.2, a copy of the Operational Status Summary for Pilgrim Nuclear Power Station is attached for your information and planning.
In accordance with PNPS Technical Specification 6.9.A.2, a copy of the Operational Status Summary for Pilgrim Nuclear Power Station is attached for your information and planning.
Respectfully submitted, H. D. Harrington PJH:vep Attachment cc: Regional Administrator, Regior I U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA   19405
Respectfully submitted, H. D. Harrington PJH:vep Attachment cc: Regional Administrator, Regior I U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19405
                                                                                      ' t}}
' t}}

Latest revision as of 09:17, 10 December 2024

Monthly Operating Rept for May 1986
ML20199D007
Person / Time
Site: Pilgrim
Issue date: 05/31/1986
From: Hamilton P, Harrington W
BOSTON EDISON CO.
To:
NRC OFFICE OF ADMINISTRATION (ADM), NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
References
86-078, 86-78, NUDOCS 8606180471
Download: ML20199D007 (7)


Text

f' AVERAGE DAILY UNIT POWER LEVEL DOCKET NO.

50-293 UNIT Pilgrim i DATE 6/11/86 COMPLETED BY P. Hamiiton

-TELEPHONE (617)746-7900 MONTH May 1986 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net)

(MWe-Net) 1 0.

17 0.

2 0.

18 0.

3 0.

19 0.

4 0.

20 0.

5 0.

21 0.

6 0.

22 0.

7 0.

23 0.

8 0.

24 9.

9 0.

25 0.

10 0.

26 0.

11 0.

27 0.

12 0.

28 0.

13 0.

29 0.

14 0.

30 0.

15 0

31 0.

16 0.

This format, lists the average daily unit power level in MWe-Net for each day in the reporting month, computed to the nearest whole megawatt.

8606180471 860531 DR ADOCK 0500 3

r OPERATING DATA REPORT DOCKET NO.

50-293 -

DATE 6/11/86 ~~

COMPLETED BY P. Hamilton TELEPHONE (617)746-7900 OPERATING STATUS 1.

Unit Name Pilgrim 1 Notes 2.

Reporting Period May 1986 3.

Licensed Thermal Power (MHt) 1998 4.

Nameplate Rating (Gross MWe) 678 5.

Design Electrical Rating (Net MHe) 655 6.

Maximum Dependable Capacity (Gross MWe) 690 7.

Maximum Dependable Capacity (Net MWe) 670 8.

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

None 9.

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

None

10. Reasons For Restrictions, If Any N/A This Month Yr-to-Date Cumulative.
11. Hours In Reporting Period 744.0 3623.0 118127.0
12. Number Of Hours Reactor Has Critical 0.0 1715.5 -

79791.1

13. Reactor Reserve Shutdown Hours 0.0 0.0 0.0
14. Hours Generator On-Line 0.0 1646.0 ~

77229.3

15. Unit Reserve Shutdown Hours 0.0 0.0 0.0
16. Gross Thermal Energy Generated (MWH) 0.0 3094416.0 I34999880.0
17. Gross Electrical Energy Generated (MHH) 0.0 1068000.0 _45444604.0
18. Net Electrical Energy Generated (MHH) 0.0 1027531.0 _43675429.0
19. Unit Service Factor 0.0 45.4 65.4
20. Unit Availability Factor 0.0 45.4 65.4
21. Unit Capacity Factor (Using MDC Net) 0.0 42.3 55.2
22. Unit Capacity Factor (Using DER Net) 00 43.3 56.4
23. Unit Forced Outage Rate 100.0 53.8 10.8
24. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each):

None

25. If Shut Down At End Of Report Period, Estimated Date of Startup 7/13/86
26. Units In Test Status (Prior to Commercial Operation):

Forecast Achieved INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATION (9/77)

REFUELING INFORMATION The following refueling information is included in the Monthly Report as requested in an NRC letter to BECo, dated January 18, 1978:

For your convenience, the'information supplied has been enumerated so that each number. corresponds to equivalent notation utilized in the request.

1.

The name of this facility is Pilgrim Nuclear Power Station, Docket Number 50-293.

2.

Scheduled date for next Refueling Shutdown:

January 1987 3.

Scheduled date for restart following refueling: March 1987 4.

Due to their similarity, requests 4, 5, & 6 are responded to collectively under #6:

5.

See #6.

6.

The new fuel, which was loaded during the 1983-84 refueling outage, is of the same P8x8R design as loaded the previous outage and consists of 160 P80RB282 assemblies.

In addition, 32 GE68-P80RB282 assemblies were also loaded.

7.

(a) There are 580 fuel assemblies in the core.

(b) There are 1,128 fuel assemblies in the spent fuel pool.

8.

(a) The station is presently licensed to store 2320 spent fuel assemblies.

The actual usable spent fuel storage capacity is 2320 fuel assemblies.

(b) The planned spent fuel storage capacity is 2320 fuel assemblies.

9.

With present spent fuel in storage, the spent fuel pool now has the capacity to accommodate an additional 1192 fuel assemblies.

BOSTON EDISON COMPANY PILGRIM NUCLEAR POWER STATION DOCKET NO. 50-293 Operational Summary for May 1986 The Unit remained shutdown throughout the month. During th'e month maintenance activity on RHR valves, main steam line isolation valves, and primary containment isolation system logic circuitry continued.

On the sixteenth a work stoppage by union personnel occurred when the existing contract expired and agreement on a new contract could not be reached. Qualifted management personnel have assumed the duties normally performed by union workers.

Restart of the unit is pending Boston Edison's supplemental response to Confirmatory Action Letter 86-10 and subsequent NRC authorization.

Existing plans are to maintain the unit in the shutdown condition for approximately six weeks beyond the completion of the current outage work to address additional hardware and administrative items.

Safety Relief Valve Challenges Month of May 1986 Requirement: NUREG-0737 T.A.P. II.K.3.3 There were no safety relief valve challenges during the month.

F UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET-NO.

50-293' i

UNIT NAME Pilcril 1 DATE 6/11/86 COMPLETED BY P. Hamilton TELEPHONE (617)746-7900 REPORT MONTH May 1986 METHOD OF LICENSE CAUSE & CORRECTIVE DURATION SHUTTING EVENT SYSTEM COMPONENT ACTION TO NO.

DATE TYPE' (HOURS) REASON' DOWN REACTOR' REPORT #

CODE' CODE' PREVENT RECURRENCE 08 5/1/86 F

744.0 A

1,3 86-008 BD ISV The unit remained (continued)86-009 BD ISV shutdown for maintenance on RHR valves, MSIV's, and PCIS logic cli cul try.

I 2

2 3

4&5 F-forced A-Equip Failure F-Admin 1-Manual Exhibit F & H S-Sched B-Maint or Test G-Oper Error 2-Manual Scram Instructions for C-Refueling H-Other 3-Auto Scram Preparation of D-Regulatory Restriction 4-Continued Data Entry Sheet E-Operator Training 5-Reduced Load Licensee Event Report

& License Examination 9-Other (LER) File (NUREG-1022)

Month May 1986 PILGRIM NUCLEAR POWER STATION

~ '

MAJOR SAFETY RELATED MAINTENANCE CORRECTIVE ACTION SYSTEM COMPONENT MALFUNCTION CAUSE MAINTENANCE TO PREVENT ASSOCIATED RECURRENCE LER Salt Pump P-2038 Excessive Out of balanced routine N/R-Service Vibration balance maintenance Water Primary MO 1001-28B Indicated As found Refurbished

- additional admin 86-009-01 Containment seat leakage testing indica-valve controls (to be issued)

Isolation ted seat

- enhanced instru-System leakage within mentation limits.

- addition of Indicated leakage controlled discussed in leakoff in response to secondary system CAL 86-10 Core Spray MO 1400-4A 2 Motor Mount Insufficient Repaired in Modified design N/R bolts sheared design accordance via PDC 86-32 with PDC 86-32 Main Steam A0-203-IA Failed local Scale build-up Refurbished the Continued moni-86-011 Isolation A0-203-2A leak rate test on seats, 8 MSIV's toring and imple-Valves A0-203-ID normal wear, mentation (as A0-203-20 and/or pilot appropriate) of A0-203-18 poppet stem BWR owners group disassociation recommendations are probable causes Auxillary Differential Burnt Up The non-seismic Replaced coil Seismic relays86-013 Electrical Lock-out switch relay was of lockout to be installed via (to be issued) for Brkr 152-509 jarred when relay PDC 85-47 (A Diesel Generator) door to breaker cabinet was opened

EOSTON EDISON COMPANY 50D EOYLaTON STmtET 50sTON. MAssACHuarns 02199 WILLIAM D. HAMRINGTON esassen veas passement me.

June 11,1986 BECo Ltr. #86-078 Otrector Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.

20555 Attn: Document Control Desk j

License No. DPR-35 Docket No. 50-293

Subject:

May 1986 Monthly Report

Dear Sir:

In accordance with PNPS Technical Specification 6.9.A.2, a copy of the Operational Status Summary for Pilgrim Nuclear Power Station is attached for your information and planning.

Respectfully submitted, H. D. Harrington PJH:vep Attachment cc: Regional Administrator, Regior I U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19405

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