ML20205C610
| ML20205C610 | |
| Person / Time | |
|---|---|
| Site: | Byron  |
| Issue date: | 07/31/1985 |
| From: | COMMONWEALTH EDISON CO. |
| To: | |
| Shared Package | |
| ML20205C595 | List: |
| References | |
| (0625M), (625M), NUDOCS 8509230058 | |
| Download: ML20205C610 (2) | |
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Report Period July 1935 UNIT SIPN1'S/REDUCTIC3 0
BYRON O
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l No.
Date T_ype Hours Reason Method LER Number System Component Cause & Corrective Action to Prevent Recurrence j
- 23) 8/1/85 S
7.5 B
2 Continued outage as a result of 100% Reactor.
Trip Startup Test from 7/27/85.
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- 24) 8/1/85 P
7.5 A
1 Unit 1 equipment hatch failed it's l
surveillance; required to shutdown as per tech spec.
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- 25) 8/7/85 F
17.8 H*
3 I.M. removed wrong cable during surveillance on i
power range channels, which actuated the 2 out of 4 reactor trip logic.
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- 1 Inadequate N.D.E. records of rafety injection
- 26) 8/29/85 F
50.6 2
valve weld, resulting in tech. spec. required shut down.
- H:
Instrument Mechanic error.
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- H:
Tech. Spec. required shutdown.
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Sumary Byron 1 is continuing in its 100% Power Test Sequence.
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TYPE Reason Method System & Component 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 03JREG-0161) 8509230050 850911 (0625M) hDR ADOCK 05000454 PDR
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cPleaA inscrt this tcblo in the July 1985 rcport ocooooooooooooococcococcoo Report Period July 1985 UNIT SHUTDOWNS / REDUCTIONS BYRON o'
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eeeeeeeeeeeeeeeeeeeeeeeeee No.
Date Type Hours Reason Method _LER Number System Component Cause & Corrective Action to Prevent Recurrence l
- 19) 7/1/85 S-168.9 A 4
Continued scheduled outage from 6/27/85.
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- 20) 7/8/85 F
14.1 A
2 A manual turbine trip was initiated at 8% Reactor Power due j
to misalignment of control rod P-8.
A reactor trip resulted.
- 21) 7/12/85 F
10.7 B
3 The reactor tripped during performance of the 507. load rejection test..
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- 22) 7/13/85 F
211.3 A 3
The reactor tripped due to high negative flux rate which was caused by lightning.
- 23) 7/27/85 S
100.0 B 2
100% Reactor Trip Startup Test.
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l Summary Byron 1 is continuing in its 100% Power Test Sequence, econoceeeeeeee.
TYPE Reason Method System & Component I
I F-Forced A-Equip Failure F-Admin 1-Manu 1 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-0161)
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